/*
* Copyright (c) 2020 - 2026 ThorVG project. All rights reserved.
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "tvgStr.h"
#include "tvgMath.h"
#include "tvgColor.h"
#include "tvgLoader.h"
#include "tvgXmlParser.h"
#include "tvgSvgLoader.h"
#include "tvgSvgSceneBuilder.h"
#include "tvgSvgCssStyle.h"
#include "tvgSvgUtil.h"
/************************************************************************/
/* Internal Class Implementation */
/************************************************************************/
/*
* According to: https://www.w3.org/TR/SVG2/coords.html#Units
* and: https://www.w3.org/TR/css-values-4/#absolute-lengths
*/
#define PX_PER_IN 96 //1 in = 96 px
#define PX_PER_PC 16 //1 pc = 1/6 in -> PX_PER_IN/6
#define PX_PER_PT 1.333333f //1 pt = 1/72 in -> PX_PER_IN/72
#define PX_PER_MM 3.779528f //1 in = 25.4 mm -> PX_PER_IN/25.4
#define PX_PER_CM 37.79528f //1 in = 2.54 cm -> PX_PER_IN/2.54
typedef bool (*parseAttributes)(const char* buf, unsigned bufLength, xmlAttributeCb func, const void* data);
typedef SvgNode* (*FactoryMethod)(SvgLoaderData* loader, SvgNode* parent, const char* buf, unsigned bufLength, parseAttributes func);
typedef SvgStyleGradient* (*GradientFactoryMethod)(SvgLoaderData* loader, const char* buf, unsigned bufLength);
static bool _parseStyleAttr(void* data, const char* key, const char* value);
static bool _parseStyleAttr(void* data, const char* key, const char* value, bool style);
static void _copyId(char** to, const char* from)
{
tvg::free(*to);
if (from) {
if (*from == '\0') *to = nullptr;
else *to = duplicate(from);
} else {
*to = nullptr;
}
}
static bool _parseNumber(const char** content, const char** end, float* number)
{
auto _end = end ? *end : nullptr;
*number = toFloat(*content, (char**)&_end);
//If the start of string is not number
if ((*content) == _end) {
if (end) *end = _end;
return false;
}
//Skip comma if any
*content = svgUtilSkipWhiteSpaceAndComma(_end);
if (end) *end = _end;
return true;
}
static constexpr struct
{
AspectRatioAlign align;
const char* tag;
} alignTags[] = {
{ AspectRatioAlign::XMinYMin, "xMinYMin" },
{ AspectRatioAlign::XMidYMin, "xMidYMin" },
{ AspectRatioAlign::XMaxYMin, "xMaxYMin" },
{ AspectRatioAlign::XMinYMid, "xMinYMid" },
{ AspectRatioAlign::XMidYMid, "xMidYMid" },
{ AspectRatioAlign::XMaxYMid, "xMaxYMid" },
{ AspectRatioAlign::XMinYMax, "xMinYMax" },
{ AspectRatioAlign::XMidYMax, "xMidYMax" },
{ AspectRatioAlign::XMaxYMax, "xMaxYMax" },
};
static void _parseAspectRatio(const char** content, AspectRatioAlign* align, AspectRatioMeetOrSlice* meetOrSlice)
{
if (STR_AS(*content, "none")) {
*align = AspectRatioAlign::None;
return;
}
for (unsigned int i = 0; i < sizeof(alignTags) / sizeof(alignTags[0]); i++) {
if (!strncmp(*content, alignTags[i].tag, 8)) {
*align = alignTags[i].align;
*content += 8;
*content = svgUtilSkipWhiteSpace(*content, nullptr);
break;
}
}
if (STR_AS(*content, "meet")) {
*meetOrSlice = AspectRatioMeetOrSlice::Meet;
} else if (STR_AS(*content, "slice")) {
*meetOrSlice = AspectRatioMeetOrSlice::Slice;
}
}
// According to https://www.w3.org/TR/SVG/coords.html#Units
static float _toFloat(const SvgParser* svgParse, const char* str, SvgParserLengthType type)
{
float parsedValue = toFloat(str, nullptr);
if (strstr(str, "cm")) parsedValue *= PX_PER_CM;
else if (strstr(str, "mm")) parsedValue *= PX_PER_MM;
else if (strstr(str, "pt")) parsedValue *= PX_PER_PT;
else if (strstr(str, "pc")) parsedValue *= PX_PER_PC;
else if (strstr(str, "in")) parsedValue *= PX_PER_IN;
else if (strstr(str, "%")) {
if (type == SvgParserLengthType::Vertical) parsedValue = (parsedValue / 100.0f) * svgParse->global.h;
else if (type == SvgParserLengthType::Horizontal) parsedValue = (parsedValue / 100.0f) * svgParse->global.w;
else if (type == SvgParserLengthType::Diagonal) parsedValue = (sqrtf(powf(svgParse->global.w, 2) + powf(svgParse->global.h, 2)) / sqrtf(2.0f)) * (parsedValue / 100.0f);
else //if other than it's radius
{
float max = svgParse->global.w;
if (max < svgParse->global.h)
max = svgParse->global.h;
parsedValue = (parsedValue / 100.0f) * max;
}
}
//TODO: Implement 'em', 'ex' attributes
return parsedValue;
}
static float _gradientToFloat(const SvgParser* svgParse, const char* str, bool& isPercentage)
{
char* end = nullptr;
auto parsedValue = toFloat(str, &end);
isPercentage = false;
if (strstr(str, "%")) {
parsedValue = parsedValue / 100.0f;
isPercentage = true;
}
else if (strstr(str, "cm")) parsedValue *= PX_PER_CM;
else if (strstr(str, "mm")) parsedValue *= PX_PER_MM;
else if (strstr(str, "pt")) parsedValue *= PX_PER_PT;
else if (strstr(str, "pc")) parsedValue *= PX_PER_PC;
else if (strstr(str, "in")) parsedValue *= PX_PER_IN;
//TODO: Implement 'em', 'ex' attributes
return parsedValue;
}
static float _toOffset(const char* str)
{
char* end = nullptr;
auto strEnd = str + strlen(str);
auto parsedValue = toFloat(str, &end);
end = (char*)svgUtilSkipWhiteSpace(end, nullptr);
auto ptr = strstr(str, "%");
if (ptr) {
parsedValue = parsedValue / 100.0f;
if (end != ptr || (end + 1) != strEnd) return 0;
} else if (end != strEnd) return 0;
return parsedValue;
}
static int _toOpacity(const char* str)
{
char* end = nullptr;
auto opacity = toFloat(str, &end);
if (end) {
if (end[0] == '%' && end[1] == '\0') return lrint(opacity * 2.55f);
else if (*end == '\0') return lrint(opacity * 255);
}
return 255;
}
static SvgMaskType _toMaskType(const char* str)
{
return STR_AS(str, "Alpha") ? SvgMaskType::Alpha : SvgMaskType::Luminance;
}
//The default rendering order: fill, stroke, markers
//If any is omitted, will be rendered in its default order after the specified ones.
static bool _toPaintOrder(const char* str)
{
auto position = 1;
auto strokePosition = 0;
auto fillPosition = 0;
while (*str != '\0') {
str = svgUtilSkipWhiteSpace(str, nullptr);
if (!strncmp(str, "fill", 4)) {
fillPosition = position++;
str += 4;
} else if (!strncmp(str, "stroke", 6)) {
strokePosition = position++;
str += 6;
} else if (!strncmp(str, "markers", 7)) {
str += 7;
} else {
return _toPaintOrder("fill stroke");
}
}
if (fillPosition == 0) fillPosition = position++;
if (strokePosition == 0) strokePosition = position++;
return fillPosition < strokePosition;
}
#define _PARSE_TAG(Type, Name, Name1, Tags_Array, Default) \
static Type _to##Name1(const char* str) \
{ \
unsigned int i; \
\
for (i = 0; i < sizeof(Tags_Array) / sizeof(Tags_Array[0]); i++) { \
if (STR_AS(str, Tags_Array[i].tag)) return Tags_Array[i].Name; \
} \
return Default; \
}
/* parse the line cap used during stroking a path.
* Value: butt | round | square | inherit
* Initial: butt
* https://www.w3.org/TR/SVG/painting.html
*/
static constexpr struct
{
StrokeCap lineCap;
const char* tag;
} lineCapTags[] = {
{ StrokeCap::Butt, "butt" },
{ StrokeCap::Round, "round" },
{ StrokeCap::Square, "square" }
};
_PARSE_TAG(StrokeCap, lineCap, LineCap, lineCapTags, StrokeCap::Butt)
/* parse the line join used during stroking a path.
* Value: miter | round | bevel | inherit
* Initial: miter
* https://www.w3.org/TR/SVG/painting.html
*/
static constexpr struct
{
StrokeJoin lineJoin;
const char* tag;
} lineJoinTags[] = {
{ StrokeJoin::Miter, "miter" },
{ StrokeJoin::Round, "round" },
{ StrokeJoin::Bevel, "bevel" }
};
_PARSE_TAG(StrokeJoin, lineJoin, LineJoin, lineJoinTags, StrokeJoin::Miter)
/* parse the fill rule used during filling a path.
* Value: nonzero | evenodd | inherit
* Initial: nonzero
* https://www.w3.org/TR/SVG/painting.html
*/
static constexpr struct
{
FillRule fillRule;
const char* tag;
} fillRuleTags[] = {
{ FillRule::EvenOdd, "evenodd" }
};
_PARSE_TAG(FillRule, fillRule, FillRule, fillRuleTags, FillRule::NonZero)
/* parse the dash pattern used during stroking a path.
* Value: none | <dasharray> | inherit
* Initial: none
* https://www.w3.org/TR/SVG/painting.html
*/
static void _parseDashArray(SvgLoaderData* loader, const char *str, SvgDash* dash)
{
if (!strncmp(str, "none", 4)) return;
char *end = nullptr;
while (*str) {
str = svgUtilSkipWhiteSpaceAndComma(str);
auto parsedValue = toFloat(str, &end);
if (str == end) break;
if (parsedValue < 0.0f) {
dash->array.reset();
return;
}
if (*end == '%') {
++end;
//Refers to the diagonal length of the viewport.
//https://www.w3.org/TR/SVG2/coords.html#Units
parsedValue = (sqrtf(powf(loader->svgParse->global.w, 2) + powf(loader->svgParse->global.h, 2)) / sqrtf(2.0f)) * (parsedValue / 100.0f);
}
dash->array.push(parsedValue);
str = end;
}
}
static char* _idFromUrl(const char* url)
{
auto open = strchr(url, '(');
auto close = strchr(url, ')');
if (!open || !close || open >= close) return nullptr;
open = strchr(url, '#');
if (!open || open >= close) return nullptr;
++open;
--close;
//trim the rest of the spaces and the quote marks if any
while (open < close && (*close == ' ' || *close == '\'' || *close == '\"')) --close;
//quick verification
for (auto id = open; id < close; id++) {
if (*id == ' ' || *id == '\'') return nullptr;
}
return duplicate(open, (close - open + 1));
}
static size_t _srcFromUrl(const char* url, char*& src)
{
src = (char*)strchr(url, '(');
auto close = strchr(url, ')');
if (!src || !close || src >= close) return 0;
src = strchr(src, '\'');
if (!src || src >= close) return 0;
++src;
close = strchr(src, '\'');
if (!close || close == src) return 0;
--close;
while (src < close && *src == ' ') ++src;
while (src < close && *close == ' ') --close;
return close - src + 1;
}
static unsigned char _parseColor(const char* value, char** end)
{
auto r = toFloat(value, end);
*end = (char*)svgUtilSkipWhiteSpace(*end, nullptr);
if (**end == '%') {
r = 255 * r / 100;
(*end)++;
}
*end = (char*)svgUtilSkipWhiteSpace(*end, nullptr);
if (r < 0 || r > 255) {
*end = nullptr;
return 0;
}
return lrint(r);
}
static constexpr struct
{
const char* name;
unsigned int value;
} colors[] = {
{ "aliceblue", 0xfff0f8ff },
{ "antiquewhite", 0xfffaebd7 },
{ "aqua", 0xff00ffff },
{ "aquamarine", 0xff7fffd4 },
{ "azure", 0xfff0ffff },
{ "beige", 0xfff5f5dc },
{ "bisque", 0xffffe4c4 },
{ "black", 0xff000000 },
{ "blanchedalmond", 0xffffebcd },
{ "blue", 0xff0000ff },
{ "blueviolet", 0xff8a2be2 },
{ "brown", 0xffa52a2a },
{ "burlywood", 0xffdeb887 },
{ "cadetblue", 0xff5f9ea0 },
{ "chartreuse", 0xff7fff00 },
{ "chocolate", 0xffd2691e },
{ "coral", 0xffff7f50 },
{ "cornflowerblue", 0xff6495ed },
{ "cornsilk", 0xfffff8dc },
{ "crimson", 0xffdc143c },
{ "cyan", 0xff00ffff },
{ "darkblue", 0xff00008b },
{ "darkcyan", 0xff008b8b },
{ "darkgoldenrod", 0xffb8860b },
{ "darkgray", 0xffa9a9a9 },
{ "darkgrey", 0xffa9a9a9 },
{ "darkgreen", 0xff006400 },
{ "darkkhaki", 0xffbdb76b },
{ "darkmagenta", 0xff8b008b },
{ "darkolivegreen", 0xff556b2f },
{ "darkorange", 0xffff8c00 },
{ "darkorchid", 0xff9932cc },
{ "darkred", 0xff8b0000 },
{ "darksalmon", 0xffe9967a },
{ "darkseagreen", 0xff8fbc8f },
{ "darkslateblue", 0xff483d8b },
{ "darkslategray", 0xff2f4f4f },
{ "darkslategrey", 0xff2f4f4f },
{ "darkturquoise", 0xff00ced1 },
{ "darkviolet", 0xff9400d3 },
{ "deeppink", 0xffff1493 },
{ "deepskyblue", 0xff00bfff },
{ "dimgray", 0xff696969 },
{ "dimgrey", 0xff696969 },
{ "dodgerblue", 0xff1e90ff },
{ "firebrick", 0xffb22222 },
{ "floralwhite", 0xfffffaf0 },
{ "forestgreen", 0xff228b22 },
{ "fuchsia", 0xffff00ff },
{ "gainsboro", 0xffdcdcdc },
{ "ghostwhite", 0xfff8f8ff },
{ "gold", 0xffffd700 },
{ "goldenrod", 0xffdaa520 },
{ "gray", 0xff808080 },
{ "grey", 0xff808080 },
{ "green", 0xff008000 },
{ "greenyellow", 0xffadff2f },
{ "honeydew", 0xfff0fff0 },
{ "hotpink", 0xffff69b4 },
{ "indianred", 0xffcd5c5c },
{ "indigo", 0xff4b0082 },
{ "ivory", 0xfffffff0 },
{ "khaki", 0xfff0e68c },
{ "lavender", 0xffe6e6fa },
{ "lavenderblush", 0xfffff0f5 },
{ "lawngreen", 0xff7cfc00 },
{ "lemonchiffon", 0xfffffacd },
{ "lightblue", 0xffadd8e6 },
{ "lightcoral", 0xfff08080 },
{ "lightcyan", 0xffe0ffff },
{ "lightgoldenrodyellow", 0xfffafad2 },
{ "lightgray", 0xffd3d3d3 },
{ "lightgrey", 0xffd3d3d3 },
{ "lightgreen", 0xff90ee90 },
{ "lightpink", 0xffffb6c1 },
{ "lightsalmon", 0xffffa07a },
{ "lightseagreen", 0xff20b2aa },
{ "lightskyblue", 0xff87cefa },
{ "lightslategray", 0xff778899 },
{ "lightslategrey", 0xff778899 },
{ "lightsteelblue", 0xffb0c4de },
{ "lightyellow", 0xffffffe0 },
{ "lime", 0xff00ff00 },
{ "limegreen", 0xff32cd32 },
{ "linen", 0xfffaf0e6 },
{ "magenta", 0xffff00ff },
{ "maroon", 0xff800000 },
{ "mediumaquamarine", 0xff66cdaa },
{ "mediumblue", 0xff0000cd },
{ "mediumorchid", 0xffba55d3 },
{ "mediumpurple", 0xff9370d8 },
{ "mediumseagreen", 0xff3cb371 },
{ "mediumslateblue", 0xff7b68ee },
{ "mediumspringgreen", 0xff00fa9a },
{ "mediumturquoise", 0xff48d1cc },
{ "mediumvioletred", 0xffc71585 },
{ "midnightblue", 0xff191970 },
{ "mintcream", 0xfff5fffa },
{ "mistyrose", 0xffffe4e1 },
{ "moccasin", 0xffffe4b5 },
{ "navajowhite", 0xffffdead },
{ "navy", 0xff000080 },
{ "oldlace", 0xfffdf5e6 },
{ "olive", 0xff808000 },
{ "olivedrab", 0xff6b8e23 },
{ "orange", 0xffffa500 },
{ "orangered", 0xffff4500 },
{ "orchid", 0xffda70d6 },
{ "palegoldenrod", 0xffeee8aa },
{ "palegreen", 0xff98fb98 },
{ "paleturquoise", 0xffafeeee },
{ "palevioletred", 0xffd87093 },
{ "papayawhip", 0xffffefd5 },
{ "peachpuff", 0xffffdab9 },
{ "peru", 0xffcd853f },
{ "pink", 0xffffc0cb },
{ "plum", 0xffdda0dd },
{ "powderblue", 0xffb0e0e6 },
{ "purple", 0xff800080 },
{ "red", 0xffff0000 },
{ "rosybrown", 0xffbc8f8f },
{ "royalblue", 0xff4169e1 },
{ "saddlebrown", 0xff8b4513 },
{ "salmon", 0xfffa8072 },
{ "sandybrown", 0xfff4a460 },
{ "seagreen", 0xff2e8b57 },
{ "seashell", 0xfffff5ee },
{ "sienna", 0xffa0522d },
{ "silver", 0xffc0c0c0 },
{ "skyblue", 0xff87ceeb },
{ "slateblue", 0xff6a5acd },
{ "slategray", 0xff708090 },
{ "slategrey", 0xff708090 },
{ "snow", 0xfffffafa },
{ "springgreen", 0xff00ff7f },
{ "steelblue", 0xff4682b4 },
{ "tan", 0xffd2b48c },
{ "teal", 0xff008080 },
{ "thistle", 0xffd8bfd8 },
{ "tomato", 0xffff6347 },
{ "turquoise", 0xff40e0d0 },
{ "violet", 0xffee82ee },
{ "wheat", 0xfff5deb3 },
{ "white", 0xffffffff },
{ "whitesmoke", 0xfff5f5f5 },
{ "yellow", 0xffffff00 },
{ "yellowgreen", 0xff9acd32 }
};
static bool _toColor(const char* str, uint8_t& r, uint8_t&g, uint8_t& b, char** ref)
{
auto len = strlen(str);
if (len == 4 && str[0] == '#') {
//Case for "#456" should be interpreted as "#445566"
if (isxdigit(str[1]) && isxdigit(str[2]) && isxdigit(str[3])) {
char tmp[3] = { '\0', '\0', '\0' };
tmp[0] = str[1];
tmp[1] = str[1];
r = strtol(tmp, nullptr, 16);
tmp[0] = str[2];
tmp[1] = str[2];
g = strtol(tmp, nullptr, 16);
tmp[0] = str[3];
tmp[1] = str[3];
b = strtol(tmp, nullptr, 16);
}
return true;
} else if (len == 7 && str[0] == '#') {
if (isxdigit(str[1]) && isxdigit(str[2]) && isxdigit(str[3]) && isxdigit(str[4]) && isxdigit(str[5]) && isxdigit(str[6])) {
char tmp[3] = { '\0', '\0', '\0' };
tmp[0] = str[1];
tmp[1] = str[2];
r = strtol(tmp, nullptr, 16);
tmp[0] = str[3];
tmp[1] = str[4];
g = strtol(tmp, nullptr, 16);
tmp[0] = str[5];
tmp[1] = str[6];
b = strtol(tmp, nullptr, 16);
}
return true;
} else if (len >= 10 && (str[0] == 'r' || str[0] == 'R') && (str[1] == 'g' || str[1] == 'G') && (str[2] == 'b' || str[2] == 'B') && str[3] == '(' && str[len - 1] == ')') {
char *red, *green, *blue;
auto tr = _parseColor(str + 4, &red);
if (red && *red == ',') {
auto tg = _parseColor(red + 1, &green);
if (green && *green == ',') {
auto tb = _parseColor(green + 1, &blue);
if (blue && blue[0] == ')' && blue[1] == '\0') {
r = tr;
g = tg;
b = tb;
}
}
}
return true;
} else if (ref && len >= 3 && !strncmp(str, "url", 3)) {
tvg::free(*ref);
*ref = _idFromUrl((const char*)(str + 3));
return true;
} else if (len >= 10 && (str[0] == 'h' || str[0] == 'H') && (str[1] == 's' || str[1] == 'S') && (str[2] == 'l' || str[2] == 'L') && str[3] == '(' && str[len - 1] == ')') {
tvg::HSL hsl;
const char* content = svgUtilSkipWhiteSpace(str + 4, nullptr);
const char* hue = nullptr;
if (_parseNumber(&content, &hue, &hsl.h) && hue) {
const char* saturation = nullptr;
hue = svgUtilSkipWhiteSpace(hue, nullptr);
hue = (char*)svgUtilSkipWhiteSpaceAndComma(hue);
hue = svgUtilSkipWhiteSpace(hue, nullptr);
if (_parseNumber(&hue, &saturation, &hsl.s) && saturation && *saturation == '%') {
const char* brightness = nullptr;
hsl.s /= 100.0f;
saturation = svgUtilSkipWhiteSpace(saturation + 1, nullptr);
saturation = (char*)svgUtilSkipWhiteSpaceAndComma(saturation);
saturation = svgUtilSkipWhiteSpace(saturation, nullptr);
if (_parseNumber(&saturation, &brightness, &hsl.l) && brightness && *brightness == '%') {
hsl.l /= 100.0f;
brightness = svgUtilSkipWhiteSpace(brightness + 1, nullptr);
if (brightness && brightness[0] == ')' && brightness[1] == '\0') {
hsl2rgb(hsl.h, tvg::clamp(hsl.s, 0.0f, 1.0f), tvg::clamp(hsl.l, 0.0f, 1.0f), r, g, b);
return true;
}
}
}
}
} else {
//Handle named color
for (unsigned int i = 0; i < (sizeof(colors) / sizeof(colors[0])); i++) {
if (!strcasecmp(colors[i].name, str)) {
r = ((uint8_t*)(&(colors[i].value)))[2];
g = ((uint8_t*)(&(colors[i].value)))[1];
b = ((uint8_t*)(&(colors[i].value)))[0];
return true;
}
}
}
return false;
}
static char* _parseNumbersArray(char* str, float* points, int* ptCount, int len)
{
int count = 0;
str = (char*)svgUtilSkipWhiteSpace(str, nullptr);
while ((count < len) && (isdigit(*str) || *str == '-' || *str == '+' || *str == '.')) {
char* end = nullptr;
points[count++] = toFloat(str, &end);
str = end;
str = (char*)svgUtilSkipWhiteSpaceAndComma(str);
//Eat the rest of space
str = (char*)svgUtilSkipWhiteSpace(str, nullptr);
}
*ptCount = count;
return str;
}
enum class MatrixState {
Unknown,
Matrix,
Translate,
Rotate,
Scale,
SkewX,
SkewY
};
#define MATRIX_DEF(Name, Value) \
{ \
#Name, sizeof(#Name), Value \
}
static constexpr struct
{
const char* tag;
int sz;
MatrixState state;
} matrixTags[] = {
MATRIX_DEF(matrix, MatrixState::Matrix),
MATRIX_DEF(translate, MatrixState::Translate),
MATRIX_DEF(rotate, MatrixState::Rotate),
MATRIX_DEF(scale, MatrixState::Scale),
MATRIX_DEF(skewX, MatrixState::SkewX),
MATRIX_DEF(skewY, MatrixState::SkewY)
};
/* parse transform attribute
* https://www.w3.org/TR/SVG/coords.html#TransformAttribute
*/
static Matrix* _parseTransformationMatrix(const char* value)
{
const int POINT_CNT = 8;
auto matrix = tvg::malloc<Matrix>(sizeof(Matrix));
tvg::identity(matrix);
float points[POINT_CNT];
int ptCount = 0;
auto str = (char*)value;
auto end = str + strlen(str);
while (str < end) {
auto state = MatrixState::Unknown;
if (isspace(*str) || (*str == ',')) {
++str;
continue;
}
for (unsigned int i = 0; i < sizeof(matrixTags) / sizeof(matrixTags[0]); i++) {
if (!strncmp(matrixTags[i].tag, str, matrixTags[i].sz - 1)) {
state = matrixTags[i].state;
str += (matrixTags[i].sz - 1);
break;
}
}
if (state == MatrixState::Unknown) goto error;
str = (char*)svgUtilSkipWhiteSpace(str, end);
if (*str != '(') goto error;
++str;
str = _parseNumbersArray(str, points, &ptCount, POINT_CNT);
if (*str != ')') goto error;
++str;
if (state == MatrixState::Matrix) {
if (ptCount != 6) goto error;
Matrix tmp = {points[0], points[2], points[4], points[1], points[3], points[5], 0, 0, 1};
*matrix *= tmp;
} else if (state == MatrixState::Translate) {
if (ptCount == 1) {
Matrix tmp = {1, 0, points[0], 0, 1, 0, 0, 0, 1};
*matrix *= tmp;
} else if (ptCount == 2) {
Matrix tmp = {1, 0, points[0], 0, 1, points[1], 0, 0, 1};
*matrix *= tmp;
} else goto error;
} else if (state == MatrixState::Rotate) {
//Transform to signed.
points[0] = fmodf(points[0], 360.0f);
if (points[0] < 0) points[0] += 360.0f;
auto c = cosf(deg2rad(points[0]));
auto s = sinf(deg2rad(points[0]));
if (ptCount == 1) {
Matrix tmp = { c, -s, 0, s, c, 0, 0, 0, 1 };
*matrix *= tmp;
} else if (ptCount == 3) {
Matrix tmp = { 1, 0, points[1], 0, 1, points[2], 0, 0, 1 };
*matrix *= tmp;
tmp = { c, -s, 0, s, c, 0, 0, 0, 1 };
*matrix *= tmp;
tmp = { 1, 0, -points[1], 0, 1, -points[2], 0, 0, 1 };
*matrix *= tmp;
} else {
goto error;
}
} else if (state == MatrixState::Scale) {
if (ptCount < 1 || ptCount > 2) goto error;
auto sx = points[0];
auto sy = sx;
if (ptCount == 2) sy = points[1];
Matrix tmp = { sx, 0, 0, 0, sy, 0, 0, 0, 1 };
*matrix *= tmp;
} else if (state == MatrixState::SkewX) {
if (ptCount != 1) goto error;
auto deg = tanf(deg2rad(points[0]));
Matrix tmp = { 1, deg, 0, 0, 1, 0, 0, 0, 1 };
*matrix *= tmp;
} else if (state == MatrixState::SkewY) {
if (ptCount != 1) goto error;
auto deg = tanf(deg2rad(points[0]));
Matrix tmp = { 1, 0, 0, deg, 1, 0, 0, 0, 1 };
*matrix *= tmp;
}
}
return matrix;
error:
tvg::free(matrix);
return nullptr;
}
#define LENGTH_DEF(Name, Value) \
{ \
#Name, sizeof(#Name), Value \
}
static bool _attrParseSvgNode(void* data, const char* key, const char* value)
{
SvgLoaderData* loader = (SvgLoaderData*)data;
SvgNode* node = loader->svgParse->node;
SvgDocNode* doc = &(node->node.doc);
if (STR_AS(key, "width")) {
doc->w = _toFloat(loader->svgParse, value, SvgParserLengthType::Horizontal);
if (strstr(value, "%") && !(doc->viewFlag & SvgViewFlag::Viewbox)) {
doc->viewFlag = (doc->viewFlag | SvgViewFlag::WidthInPercent);
} else {
doc->viewFlag = (doc->viewFlag | SvgViewFlag::Width);
}
} else if (STR_AS(key, "height")) {
doc->h = _toFloat(loader->svgParse, value, SvgParserLengthType::Vertical);
if (strstr(value, "%") && !(doc->viewFlag & SvgViewFlag::Viewbox)) {
doc->viewFlag = (doc->viewFlag | SvgViewFlag::HeightInPercent);
} else {
doc->viewFlag = (doc->viewFlag | SvgViewFlag::Height);
}
} else if (STR_AS(key, "viewBox")) {
if (_parseNumber(&value, nullptr, &doc->vbox.x)) {
if (_parseNumber(&value, nullptr, &doc->vbox.y)) {
if (_parseNumber(&value, nullptr, &doc->vbox.w)) {
if (_parseNumber(&value, nullptr, &doc->vbox.h)) {
doc->viewFlag = (doc->viewFlag | SvgViewFlag::Viewbox);
loader->svgParse->global.h = doc->vbox.h;
}
loader->svgParse->global.w = doc->vbox.w;
}
loader->svgParse->global.y = doc->vbox.y;
}
loader->svgParse->global.x = doc->vbox.x;
}
if ((doc->viewFlag & SvgViewFlag::Viewbox) && (doc->vbox.w < 0.0f || doc->vbox.h < 0.0f)) {
doc->viewFlag = (SvgViewFlag)((uint32_t)doc->viewFlag & ~(uint32_t)SvgViewFlag::Viewbox);
TVGLOG("SVG", "Negative values of the <viewBox> width and/or height - the attribute invalidated.");
}
if (!(doc->viewFlag & SvgViewFlag::Viewbox)) {
loader->svgParse->global.x = loader->svgParse->global.y = 0.0f;
loader->svgParse->global.w = loader->svgParse->global.h = 1.0f;
}
} else if (STR_AS(key, "preserveAspectRatio")) {
_parseAspectRatio(&value, &doc->align, &doc->meetOrSlice);
} else if (STR_AS(key, "style")) {
return xmlParseW3CAttribute(value, strlen(value), _parseStyleAttr, loader);
#ifdef THORVG_LOG_ENABLED
} else if ((STR_AS(key, "x") || STR_AS(key, "y")) && fabsf(toFloat(value, nullptr)) > FLOAT_EPSILON) {
TVGLOG("SVG", "Unsupported attributes used [Elements type: Svg][Attribute: %s][Value: %s]", key, value);
#endif
} else {
return _parseStyleAttr(loader, key, value, false);
}
return true;
}
//https://www.w3.org/TR/SVGTiny12/painting.html#SpecifyingPaint
static void _handlePaintAttr(SvgPaint* paint, const char* value)
{
if (STR_AS(value, "none")) {
//No paint property
paint->none = true;
return;
}
if (STR_AS(value, "currentColor")) {
paint->curColor = true;
paint->none = false;
return;
}
if (_toColor(value, paint->color.r, paint->color.g, paint->color.b, &paint->url)) paint->none = false;
}
static void _handleColorAttr(TVG_UNUSED SvgLoaderData* loader, SvgNode* node, const char* value)
{
auto style = node->style;
if (_toColor(value, style->color.r, style->color.g, style->color.b, nullptr)) {
style->curColorSet = true;
}
}
static void _handleFillAttr(TVG_UNUSED SvgLoaderData* loader, SvgNode* node, const char* value)
{
auto style = node->style;
style->fill.flags = (style->fill.flags | SvgFillFlags::Paint);
_handlePaintAttr(&style->fill.paint, value);
}
static void _handleStrokeAttr(TVG_UNUSED SvgLoaderData* loader, SvgNode* node, const char* value)
{
auto style = node->style;
style->stroke.flags = (style->stroke.flags | SvgStrokeFlags::Paint);
_handlePaintAttr(&style->stroke.paint, value);
}
static void _handleStrokeOpacityAttr(TVG_UNUSED SvgLoaderData* loader, SvgNode* node, const char* value)
{
node->style->stroke.flags = (node->style->stroke.flags | SvgStrokeFlags::Opacity);
node->style->stroke.opacity = _toOpacity(value);
}
static void _handleStrokeDashArrayAttr(SvgLoaderData* loader, SvgNode* node, const char* value)
{
node->style->stroke.flags = (node->style->stroke.flags | SvgStrokeFlags::Dash);
_parseDashArray(loader, value, &node->style->stroke.dash);
}
static void _handleStrokeDashOffsetAttr(SvgLoaderData* loader, SvgNode* node, const char* value)
{
node->style->stroke.flags = (node->style->stroke.flags | SvgStrokeFlags::DashOffset);
node->style->stroke.dash.offset = _toFloat(loader->svgParse, value, SvgParserLengthType::Horizontal);
}
static void _handleStrokeWidthAttr(SvgLoaderData* loader, SvgNode* node, const char* value)
{
node->style->stroke.flags = (node->style->stroke.flags | SvgStrokeFlags::Width);
node->style->stroke.width = _toFloat(loader->svgParse, value, SvgParserLengthType::Diagonal);
}
static void _handleStrokeLineCapAttr(TVG_UNUSED SvgLoaderData* loader, SvgNode* node, const char* value)
{
node->style->stroke.flags = (node->style->stroke.flags | SvgStrokeFlags::Cap);
node->style->stroke.cap = _toLineCap(value);
}
static void _handleStrokeLineJoinAttr(TVG_UNUSED SvgLoaderData* loader, SvgNode* node, const char* value)
{
node->style->stroke.flags = (node->style->stroke.flags | SvgStrokeFlags::Join);
node->style->stroke.join = _toLineJoin(value);
}
static void _handleStrokeMiterlimitAttr(SvgLoaderData* loader, SvgNode* node, const char* value)
{
char* end = nullptr;
const float miterlimit = toFloat(value, &end);
// https://www.w3.org/TR/SVG2/painting.html#LineJoin
// - A negative value for stroke-miterlimit must be treated as an illegal value.
if (miterlimit < 0.0f) {
TVGERR("SVG", "A stroke-miterlimit change (%f <- %f) with a negative value is omitted.", node->style->stroke.miterlimit, miterlimit);
return;
}
node->style->stroke.flags = (node->style->stroke.flags | SvgStrokeFlags::Miterlimit);
node->style->stroke.miterlimit = miterlimit;
}
static void _handleFillRuleAttr(TVG_UNUSED SvgLoaderData* loader, SvgNode* node, const char* value)
{
node->style->fill.flags = (node->style->fill.flags | SvgFillFlags::FillRule);
node->style->fill.fillRule = _toFillRule(value);
}
static void _handleOpacityAttr(TVG_UNUSED SvgLoaderData* loader, SvgNode* node, const char* value)
{
node->style->flags = (node->style->flags | SvgStyleFlags::Opacity);
node->style->opacity = _toOpacity(value);
}
static void _handleFillOpacityAttr(TVG_UNUSED SvgLoaderData* loader, SvgNode* node, const char* value)
{
node->style->fill.flags = (node->style->fill.flags | SvgFillFlags::Opacity);
node->style->fill.opacity = _toOpacity(value);
}
static void _handleTransformAttr(TVG_UNUSED SvgLoaderData* loader, SvgNode* node, const char* value)
{
node->transform = _parseTransformationMatrix(value);
}
static void _handleClipPathAttr(TVG_UNUSED SvgLoaderData* loader, SvgNode* node, const char* value)
{
auto style = node->style;
int len = strlen(value);
if (len >= 3 && !strncmp(value, "url", 3)) {
tvg::free(style->clipPath.url);
style->clipPath.url = _idFromUrl((const char*)(value + 3));
}
}
static void _handleMaskAttr(TVG_UNUSED SvgLoaderData* loader, SvgNode* node, const char* value)
{
auto style = node->style;
int len = strlen(value);
if (len >= 3 && !strncmp(value, "url", 3)) {
tvg::free(style->mask.url);
style->mask.url = _idFromUrl((const char*)(value + 3));
}
}
static void _handleFilterAttr(TVG_UNUSED SvgLoaderData* loader, SvgNode* node, const char* value)
{
auto style = node->style;
int len = strlen(value);
if (len >= 3 && !strncmp(value, "url", 3)) {
if (style->filter.url) tvg::free(style->filter.url);
style->filter.url = _idFromUrl((const char*)(value + 3));
}
}
static void _handleMaskTypeAttr(TVG_UNUSED SvgLoaderData* loader, SvgNode* node, const char* value)
{
node->node.mask.type = _toMaskType(value);
}
static void _handleDisplayAttr(TVG_UNUSED SvgLoaderData* loader, SvgNode* node, const char* value)
{
//TODO : The display attribute can have various values as well as "none".
// The default is "inline" which means visible and "none" means invisible.
// Depending on the type of node, additional functionality may be required.
// refer to https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/display
node->style->flags = (node->style->flags | SvgStyleFlags::Display);
if (STR_AS(value, "none")) node->style->display = false;
else node->style->display = true;
}
static bool _cssApplyClass(SvgNode* node, const char* classString, SvgNode* styleRoot);
static void _handlePaintOrderAttr(TVG_UNUSED SvgLoaderData* loader, SvgNode* node, const char* value)
{
node->style->flags = (node->style->flags | SvgStyleFlags::PaintOrder);
node->style->paintOrder = _toPaintOrder(value);
}
static void _handleCssClassAttr(SvgLoaderData* loader, SvgNode* node, const char* value)
{
auto cssClass = &node->style->cssClass;
_copyId(cssClass, value);
if (!_cssApplyClass(node, *cssClass, loader->cssStyle)) {
loader->nodesToStyle.push({node, *cssClass});
}
}
typedef void (*styleMethod)(SvgLoaderData* loader, SvgNode* node, const char* value);
#define STYLE_DEF(Name, Name1, Flag) { #Name, sizeof(#Name), _handle##Name1##Attr, Flag }
static constexpr struct
{
const char* tag;
int sz;
styleMethod tagHandler;
SvgStyleFlags flag;
} styleTags[] = {
STYLE_DEF(color, Color, SvgStyleFlags::Color),
STYLE_DEF(fill, Fill, SvgStyleFlags::Fill),
STYLE_DEF(fill-rule, FillRule, SvgStyleFlags::FillRule),
STYLE_DEF(fill-opacity, FillOpacity, SvgStyleFlags::FillOpacity),
STYLE_DEF(opacity, Opacity, SvgStyleFlags::Opacity),
STYLE_DEF(stroke, Stroke, SvgStyleFlags::Stroke),
STYLE_DEF(stroke-width, StrokeWidth, SvgStyleFlags::StrokeWidth),
STYLE_DEF(stroke-linejoin, StrokeLineJoin, SvgStyleFlags::StrokeLineJoin),
STYLE_DEF(stroke-miterlimit, StrokeMiterlimit, SvgStyleFlags::StrokeMiterlimit),
STYLE_DEF(stroke-linecap, StrokeLineCap, SvgStyleFlags::StrokeLineCap),
STYLE_DEF(stroke-opacity, StrokeOpacity, SvgStyleFlags::StrokeOpacity),
STYLE_DEF(stroke-dasharray, StrokeDashArray, SvgStyleFlags::StrokeDashArray),
STYLE_DEF(stroke-dashoffset, StrokeDashOffset, SvgStyleFlags::StrokeDashOffset),
STYLE_DEF(transform, Transform, SvgStyleFlags::Transform),
STYLE_DEF(clip-path, ClipPath, SvgStyleFlags::ClipPath),
STYLE_DEF(mask, Mask, SvgStyleFlags::Mask),
STYLE_DEF(mask-type, MaskType, SvgStyleFlags::MaskType),
STYLE_DEF(display, Display, SvgStyleFlags::Display),
STYLE_DEF(paint-order, PaintOrder, SvgStyleFlags::PaintOrder),
STYLE_DEF(filter, Filter, SvgStyleFlags::Filter)
};
static SvgXmlSpace _toXmlSpace(const char* str)
{
if (STR_AS(str, "default")) return SvgXmlSpace::Default;
if (STR_AS(str, "preserve")) return SvgXmlSpace::Preserve;
return SvgXmlSpace::None;
}
static bool _parseStyleAttr(void* data, const char* key, const char* value, bool style)
{
if (!key || !value) return false;
//Trim the white space
key = svgUtilSkipWhiteSpace(key, nullptr);
value = svgUtilSkipWhiteSpace(value, nullptr);
auto loader = (SvgLoaderData*)data;
auto node = loader->svgParse->node;
if (!style && STR_AS(key, "xml:space")) {
node->xmlSpace = _toXmlSpace(value);
return true;
}
int sz = strlen(key);
for (unsigned int i = 0; i < sizeof(styleTags) / sizeof(styleTags[0]); i++) {
if (styleTags[i].sz - 1 == sz && !strncmp(styleTags[i].tag, key, sz)) {
bool importance = false;
if (auto ptr = strstr(value, "!important")) {
size_t size = ptr - value;
while (size > 0 && isspace(value[size - 1])) {
size--;
}
value = duplicate(value, size);
importance = true;
}
if (style) {
if (importance || !(node->style->flagsImportance & styleTags[i].flag)) {
styleTags[i].tagHandler(loader, node, value);
node->style->flags = (node->style->flags | styleTags[i].flag);
}
} else if (!(node->style->flags & styleTags[i].flag)) {
styleTags[i].tagHandler(loader, node, value);
}
if (importance) {
node->style->flagsImportance = (node->style->flags | styleTags[i].flag);
tvg::free(const_cast<char*>(value));
}
return true;
}
}
return false;
}
static bool _parseStyleAttr(void* data, const char* key, const char* value)
{
return _parseStyleAttr(data, key, value, true);
}
/* parse g node
* https://www.w3.org/TR/SVG/struct.html#Groups
*/
static bool _attrParseGNode(void* data, const char* key, const char* value)
{
auto loader = (SvgLoaderData*)data;
auto node = loader->svgParse->node;
if (STR_AS(key, "style")) return xmlParseW3CAttribute(value, strlen(value), _parseStyleAttr, loader);
else if (STR_AS(key, "transform")) node->transform = _parseTransformationMatrix(value);
else if (STR_AS(key, "id")) _copyId(&node->id, value);
else if (STR_AS(key, "class")) _handleCssClassAttr(loader, node, value);
else if (STR_AS(key, "clip-path")) _handleClipPathAttr(loader, node, value);
else if (STR_AS(key, "mask")) _handleMaskAttr(loader, node, value);
else if (STR_AS(key, "filter")) _handleFilterAttr(loader, node, value);
else return _parseStyleAttr(loader, key, value, false);
return true;
}
/* parse clipPath node
* https://www.w3.org/TR/SVG/struct.html#Groups
*/
static bool _attrParseClipPathNode(void* data, const char* key, const char* value)
{
auto loader = (SvgLoaderData*)data;
auto node = loader->svgParse->node;
auto clip = &node->node.clip;
if (STR_AS(key, "style")) {
return xmlParseW3CAttribute(value, strlen(value), _parseStyleAttr, loader);
} else if (STR_AS(key, "transform")) {
node->transform = _parseTransformationMatrix(value);
} else if (STR_AS(key, "id")) {
_copyId(&node->id, value);
} else if (STR_AS(key, "class")) {
_handleCssClassAttr(loader, node, value);
} else if (STR_AS(key, "clipPathUnits")) {
if (STR_AS(value, "objectBoundingBox")) clip->userSpace = false;
} else {
return _parseStyleAttr(loader, key, value, false);
}
return true;
}
static bool _attrParseMaskNode(void* data, const char* key, const char* value)
{
auto loader = (SvgLoaderData*)data;
auto node = loader->svgParse->node;
auto mask = &node->node.mask;
if (STR_AS(key, "style")) {
return xmlParseW3CAttribute(value, strlen(value), _parseStyleAttr, loader);
} else if (STR_AS(key, "transform")) {
node->transform = _parseTransformationMatrix(value);
} else if (STR_AS(key, "id")) {
_copyId(&node->id, value);
} else if (STR_AS(key, "class")) {
_handleCssClassAttr(loader, node, value);
} else if (STR_AS(key, "maskContentUnits")) {
if (STR_AS(value, "objectBoundingBox")) mask->userSpace = false;
} else if (STR_AS(key, "mask-type")) {
mask->type = _toMaskType(value);
} else {
return _parseStyleAttr(loader, key, value, false);
}
return true;
}
static bool _attrParseCssStyleNode(void* data, const char* key, const char* value)
{
auto loader = (SvgLoaderData*)data;
auto node = loader->svgParse->node;
if (STR_AS(key, "id")) _copyId(&node->id, value);
else return _parseStyleAttr(loader, key, value, false);
return true;
}
static bool _attrParseSymbolNode(void* data, const char* key, const char* value)
{
auto loader = (SvgLoaderData*)data;
auto node = loader->svgParse->node;
auto symbol = &node->node.symbol;
if (STR_AS(key, "viewBox")) {
if (!_parseNumber(&value, nullptr, &symbol->vx) || !_parseNumber(&value, nullptr, &symbol->vy)) return false;
if (!_parseNumber(&value, nullptr, &symbol->vw) || !_parseNumber(&value, nullptr, &symbol->vh)) return false;
symbol->hasViewBox = true;
} else if (STR_AS(key, "width")) {
symbol->w = _toFloat(loader->svgParse, value, SvgParserLengthType::Horizontal);
symbol->hasWidth = true;
} else if (STR_AS(key, "height")) {
symbol->h = _toFloat(loader->svgParse, value, SvgParserLengthType::Vertical);
symbol->hasHeight = true;
} else if (STR_AS(key, "preserveAspectRatio")) {
_parseAspectRatio(&value, &symbol->align, &symbol->meetOrSlice);
} else if (STR_AS(key, "overflow")) {
if (STR_AS(value, "visible")) symbol->overflowVisible = true;
} else {
return _attrParseGNode(data, key, value);
}
return true;
}
static constexpr struct
{
const char* tag;
SvgParserLengthType type;
int sz;
size_t offset;
} boxTags[] = {
{"x", SvgParserLengthType::Horizontal, sizeof("x"), offsetof(Box, x)},
{"y", SvgParserLengthType::Vertical, sizeof("y"), offsetof(Box, y)},
{"width", SvgParserLengthType::Horizontal, sizeof("width"), offsetof(Box, w)},
{"height", SvgParserLengthType::Vertical, sizeof("height"), offsetof(Box, h)}
};
static bool _parseBox(const char* key, const char* value, Box* box, bool (&isPercentage)[4])
{
auto array = (unsigned char*)box;
int sz = strlen(key);
for (unsigned int i = 0; i < sizeof(boxTags) / sizeof(boxTags[0]); i++) {
if (boxTags[i].sz - 1 == sz && !strncmp(boxTags[i].tag, key, sz)) {
*(float*)(array + boxTags[i].offset) = _gradientToFloat(nullptr, value, isPercentage[i]);
return true;
}
}
return false;
}
static void _recalcBox(const SvgLoaderData* loader, Box* box, bool (&isPercentage)[4])
{
auto array = (unsigned char*)box;
for (unsigned int i = 0; i < sizeof(boxTags) / sizeof(boxTags[0]); i++) {
if (!isPercentage[i]) continue;
if (boxTags[i].type == SvgParserLengthType::Horizontal) *(float*)(array + boxTags[i].offset) *= loader->svgParse->global.w;
else *(float*)(array + boxTags[i].offset) *= loader->svgParse->global.h;
}
}
static bool _attrParseFilterNode(void* data, const char* key, const char* value)
{
auto loader = (SvgLoaderData*)data;
auto node = loader->svgParse->node;
auto filter = &node->node.filter;
_parseBox(key, value, &filter->box, filter->isPercentage);
if (STR_AS(key, "id")) {
_copyId(&node->id, value);
} else if (STR_AS(key, "primitiveUnits")) {
if (STR_AS(value, "objectBoundingBox")) filter->primitiveUserSpace = false;
} else if (STR_AS(key, "filterUnits")) {
if (STR_AS(value, "userSpaceOnUse")) filter->filterUserSpace = true;
}
return true;
}
static void _parseGaussianBlurStdDeviation(const char** content, float* x, float* y)
{
auto str = *content;
char* end = nullptr;
float deviation[2] = {0, 0};
int n = 0;
while (*str && n < 2) {
str = svgUtilSkipWhiteSpaceAndComma(str);
auto parsedValue = toFloat(str, &end);
if (parsedValue < 0.0f) break;
deviation[n++] = parsedValue;
str = end;
}
*x = deviation[0];
*y = n == 1 ? deviation[0] : deviation[1];
}
static bool _attrParseGaussianBlurNode(void* data, const char* key, const char* value)
{
SvgLoaderData* loader = (SvgLoaderData*)data;
SvgNode* node = loader->svgParse->node;
SvgGaussianBlurNode* gaussianBlur = &node->node.gaussianBlur;
if (_parseBox(key, value, &gaussianBlur->box, gaussianBlur->isPercentage)) gaussianBlur->hasBox = true;
if (STR_AS(key, "id")) {
_copyId(&node->id, value);
} else if (STR_AS(key, "stdDeviation")) {
_parseGaussianBlurStdDeviation(&value, &gaussianBlur->stdDevX, &gaussianBlur->stdDevY);
} else if (STR_AS(key, "edgeMode")) {
if (STR_AS(value, "wrap")) gaussianBlur->edgeModeWrap = true;
} else return _parseStyleAttr(loader, key, value, false);
return true;
}
static SvgNode* _createNode(SvgNode* parent, SvgNodeType type)
{
SvgNode* node = tvg::calloc<SvgNode>(1, sizeof(SvgNode));
//Default fill property
node->style = tvg::calloc<SvgStyleProperty>(1, sizeof(SvgStyleProperty));
//Set the default values other than 0/false: https://www.w3.org/TR/SVGTiny12/painting.html#SpecifyingPaint
node->style->opacity = 255;
node->style->fill.opacity = 255;
node->style->fill.fillRule = FillRule::NonZero;
node->style->stroke.paint.none = true;
node->style->stroke.opacity = 255;
node->style->stroke.width = 1;
node->style->stroke.cap = StrokeCap::Butt;
node->style->stroke.join = StrokeJoin::Miter;
node->style->stroke.miterlimit = 4.0f;
node->style->stroke.scale = 1.0;
node->style->paintOrder = _toPaintOrder("fill stroke");
node->style->display = true;
node->parent = parent;
node->type = type;
node->xmlSpace = SvgXmlSpace::None;
if (parent) parent->child.push(node);
return node;
}
static SvgNode* _createDefsNode(TVG_UNUSED SvgLoaderData* loader, TVG_UNUSED SvgNode* parent, const char* buf, unsigned bufLength, TVG_UNUSED parseAttributes func)
{
if (loader->def && loader->doc->node.doc.defs) return loader->def;
loader->def = loader->doc->node.doc.defs = _createNode(nullptr, SvgNodeType::Defs);
return loader->def;
}
static SvgNode* _createGNode(TVG_UNUSED SvgLoaderData* loader, SvgNode* parent, const char* buf, unsigned bufLength, parseAttributes func)
{
loader->svgParse->node = _createNode(parent, SvgNodeType::G);
func(buf, bufLength, _attrParseGNode, loader);
return loader->svgParse->node;
}
static SvgNode* _createSvgNode(SvgLoaderData* loader, SvgNode* parent, const char* buf, unsigned bufLength, parseAttributes func)
{
loader->svgParse->node = _createNode(parent, SvgNodeType::Doc);
auto doc = &loader->svgParse->node->node.doc;
loader->svgParse->global.w = 1.0f;
loader->svgParse->global.h = 1.0f;
doc->align = AspectRatioAlign::XMidYMid;
doc->meetOrSlice = AspectRatioMeetOrSlice::Meet;
doc->viewFlag = SvgViewFlag::None;
func(buf, bufLength, _attrParseSvgNode, loader);
if (!(doc->viewFlag & SvgViewFlag::Viewbox)) {
if (doc->viewFlag & SvgViewFlag::Width) {
loader->svgParse->global.w = doc->w;
}
if (doc->viewFlag & SvgViewFlag::Height) {
loader->svgParse->global.h = doc->h;
}
}
return loader->svgParse->node;
}
static SvgNode* _createMaskNode(SvgLoaderData* loader, SvgNode* parent, TVG_UNUSED const char* buf, TVG_UNUSED unsigned bufLength, parseAttributes func)
{
loader->svgParse->node = _createNode(parent, SvgNodeType::Mask);
if (!loader->svgParse->node) return nullptr;
loader->svgParse->node->node.mask.userSpace = true;
loader->svgParse->node->node.mask.type = SvgMaskType::Luminance;
func(buf, bufLength, _attrParseMaskNode, loader);
return loader->svgParse->node;
}
static SvgNode* _createClipPathNode(SvgLoaderData* loader, SvgNode* parent, const char* buf, unsigned bufLength, parseAttributes func)
{
loader->svgParse->node = _createNode(parent, SvgNodeType::ClipPath);
if (!loader->svgParse->node) return nullptr;
loader->svgParse->node->style->display = false;
loader->svgParse->node->node.clip.userSpace = true;
func(buf, bufLength, _attrParseClipPathNode, loader);
return loader->svgParse->node;
}
static SvgNode* _createCssStyleNode(SvgLoaderData* loader, SvgNode* parent, const char* buf, unsigned bufLength, parseAttributes func)
{
loader->svgParse->node = _createNode(parent, SvgNodeType::CssStyle);
if (!loader->svgParse->node) return nullptr;
func(buf, bufLength, _attrParseCssStyleNode, loader);
return loader->svgParse->node;
}
static SvgNode* _createSymbolNode(SvgLoaderData* loader, SvgNode* parent, const char* buf, unsigned bufLength, parseAttributes func)
{
loader->svgParse->node = _createNode(parent, SvgNodeType::Symbol);
if (!loader->svgParse->node) return nullptr;
loader->svgParse->node->node.symbol.align = AspectRatioAlign::XMidYMid;
loader->svgParse->node->node.symbol.meetOrSlice = AspectRatioMeetOrSlice::Meet;
func(buf, bufLength, _attrParseSymbolNode, loader);
return loader->svgParse->node;
}
static SvgNode* _createGaussianBlurNode(SvgLoaderData* loader, SvgNode* parent, const char* buf, unsigned bufLength, parseAttributes func)
{
loader->svgParse->node = _createNode(parent, SvgNodeType::GaussianBlur);
if (!loader->svgParse->node) return nullptr;
loader->svgParse->node->style->display = false;
loader->svgParse->node->node.gaussianBlur.box = {0.0f, 0.0f, 1.0f, 1.0f};
func(buf, bufLength, _attrParseGaussianBlurNode, loader);
return loader->svgParse->node;
}
static SvgNode* _createFilterNode(SvgLoaderData* loader, SvgNode* parent, const char* buf, unsigned bufLength, parseAttributes func)
{
loader->svgParse->node = _createNode(parent, SvgNodeType::Filter);
if (!loader->svgParse->node) return nullptr;
SvgFilterNode& filter = loader->svgParse->node->node.filter;
loader->svgParse->node->style->display = false;
filter.box = {-0.1f, -0.1f, 1.2f, 1.2f};
filter.primitiveUserSpace = true;
func(buf, bufLength, _attrParseFilterNode, loader);
if (filter.filterUserSpace) _recalcBox(loader, &filter.box, filter.isPercentage);
return loader->svgParse->node;
}
static bool _attrParsePathNode(void* data, const char* key, const char* value)
{
auto loader = (SvgLoaderData*)data;
auto node = loader->svgParse->node;
auto path = &node->node.path;
if (STR_AS(key, "d")) _copyId(&path->path, value); // Temporary: need to copy
else if (STR_AS(key, "style")) return xmlParseW3CAttribute(value, strlen(value), _parseStyleAttr, loader);
else if (STR_AS(key, "clip-path")) _handleClipPathAttr(loader, node, value);
else if (STR_AS(key, "mask")) _handleMaskAttr(loader, node, value);
else if (STR_AS(key, "filter")) _handleFilterAttr(loader, node, value);
else if (STR_AS(key, "id")) _copyId(&node->id, value);
else if (STR_AS(key, "class")) _handleCssClassAttr(loader, node, value);
else return _parseStyleAttr(loader, key, value, false);
return true;
}
static SvgNode* _createPathNode(SvgLoaderData* loader, SvgNode* parent, const char* buf, unsigned bufLength, parseAttributes func)
{
loader->svgParse->node = _createNode(parent, SvgNodeType::Path);
if (!loader->svgParse->node) return nullptr;
func(buf, bufLength, _attrParsePathNode, loader);
return loader->svgParse->node;
}
static constexpr struct
{
const char* tag;
SvgParserLengthType type;
int sz;
size_t offset;
} circleTags[] = {
{"cx", SvgParserLengthType::Horizontal, sizeof("cx"), offsetof(SvgCircleNode, cx)},
{"cy", SvgParserLengthType::Vertical, sizeof("cy"), offsetof(SvgCircleNode, cy)},
{"r", SvgParserLengthType::Diagonal, sizeof("r"), offsetof(SvgCircleNode, r)}
};
/* parse the attributes for a circle element.
* https://www.w3.org/TR/SVG/shapes.html#CircleElement
*/
static bool _attrParseCircleNode(void* data, const char* key, const char* value)
{
auto loader = (SvgLoaderData*)data;
auto node = loader->svgParse->node;
auto circle = &node->node.circle;
unsigned char* array;
int sz = strlen(key);
array = (unsigned char*)circle;
for (unsigned int i = 0; i < sizeof(circleTags) / sizeof(circleTags[0]); i++) {
if (circleTags[i].sz - 1 == sz && !strncmp(circleTags[i].tag, key, sz)) {
*((float*)(array + circleTags[i].offset)) = _toFloat(loader->svgParse, value, circleTags[i].type);
return true;
}
}
if (STR_AS(key, "style")) return xmlParseW3CAttribute(value, strlen(value), _parseStyleAttr, loader);
else if (STR_AS(key, "clip-path")) _handleClipPathAttr(loader, node, value);
else if (STR_AS(key, "mask")) _handleMaskAttr(loader, node, value);
else if (STR_AS(key, "filter")) _handleFilterAttr(loader, node, value);
else if (STR_AS(key, "id")) _copyId(&node->id, value);
else if (STR_AS(key, "class")) _handleCssClassAttr(loader, node, value);
else return _parseStyleAttr(loader, key, value, false);
return true;
}
static SvgNode* _createCircleNode(SvgLoaderData* loader, SvgNode* parent, const char* buf, unsigned bufLength, parseAttributes func)
{
loader->svgParse->node = _createNode(parent, SvgNodeType::Circle);
if (!loader->svgParse->node) return nullptr;
func(buf, bufLength, _attrParseCircleNode, loader);
return loader->svgParse->node;
}
static constexpr struct
{
const char* tag;
SvgParserLengthType type;
int sz;
size_t offset;
} ellipseTags[] = {
{"cx", SvgParserLengthType::Horizontal, sizeof("cx"), offsetof(SvgEllipseNode, cx)},
{"cy", SvgParserLengthType::Vertical, sizeof("cy"), offsetof(SvgEllipseNode, cy)},
{"rx", SvgParserLengthType::Horizontal, sizeof("rx"), offsetof(SvgEllipseNode, rx)},
{"ry", SvgParserLengthType::Vertical, sizeof("ry"), offsetof(SvgEllipseNode, ry)}
};
/* parse the attributes for an ellipse element.
* https://www.w3.org/TR/SVG/shapes.html#EllipseElement
*/
static bool _attrParseEllipseNode(void* data, const char* key, const char* value)
{
SvgLoaderData* loader = (SvgLoaderData*)data;
SvgNode* node = loader->svgParse->node;
SvgEllipseNode* ellipse = &(node->node.ellipse);
unsigned char* array;
int sz = strlen(key);
array = (unsigned char*)ellipse;
for (unsigned int i = 0; i < sizeof(ellipseTags) / sizeof(ellipseTags[0]); i++) {
if (ellipseTags[i].sz - 1 == sz && !strncmp(ellipseTags[i].tag, key, sz)) {
*((float*)(array + ellipseTags[i].offset)) = _toFloat(loader->svgParse, value, ellipseTags[i].type);
return true;
}
}
if (STR_AS(key, "id")) _copyId(&node->id, value);
else if (STR_AS(key, "class")) _handleCssClassAttr(loader, node, value);
else if (STR_AS(key, "style")) return xmlParseW3CAttribute(value, strlen(value), _parseStyleAttr, loader);
else if (STR_AS(key, "clip-path")) _handleClipPathAttr(loader, node, value);
else if (STR_AS(key, "mask")) _handleMaskAttr(loader, node, value);
else if (STR_AS(key, "filter")) _handleFilterAttr(loader, node, value);
else return _parseStyleAttr(loader, key, value, false);
return true;
}
static SvgNode* _createEllipseNode(SvgLoaderData* loader, SvgNode* parent, const char* buf, unsigned bufLength, parseAttributes func)
{
loader->svgParse->node = _createNode(parent, SvgNodeType::Ellipse);
if (!loader->svgParse->node) return nullptr;
func(buf, bufLength, _attrParseEllipseNode, loader);
return loader->svgParse->node;
}
static bool _attrParsePolygonPoints(const char* str, SvgPolygonNode* polygon)
{
float num_x, num_y;
while (_parseNumber(&str, nullptr, &num_x) && _parseNumber(&str, nullptr, &num_y)) {
polygon->pts.push(num_x);
polygon->pts.push(num_y);
}
return true;
}
/* parse the attributes for a polygon element.
* https://www.w3.org/TR/SVG/shapes.html#PolylineElement
*/
static bool _attrParsePolygonNode(void* data, const char* key, const char* value)
{
auto loader = (SvgLoaderData*)data;
auto node = loader->svgParse->node;
SvgPolygonNode* polygon = nullptr;
if (node->type == SvgNodeType::Polygon) polygon = &node->node.polygon;
else polygon = &node->node.polyline;
if (STR_AS(key, "points")) return _attrParsePolygonPoints(value, polygon);
else if (STR_AS(key, "style")) return xmlParseW3CAttribute(value, strlen(value), _parseStyleAttr, loader);
else if (STR_AS(key, "clip-path")) _handleClipPathAttr(loader, node, value);
else if (STR_AS(key, "mask")) _handleMaskAttr(loader, node, value);
else if (STR_AS(key, "filter")) _handleFilterAttr(loader, node, value);
else if (STR_AS(key, "id")) _copyId(&node->id, value);
else if (STR_AS(key, "class")) _handleCssClassAttr(loader, node, value);
else return _parseStyleAttr(loader, key, value, false);
return true;
}
static SvgNode* _createPolygonNode(SvgLoaderData* loader, SvgNode* parent, const char* buf, unsigned bufLength, parseAttributes func)
{
loader->svgParse->node = _createNode(parent, SvgNodeType::Polygon);
if (!loader->svgParse->node) return nullptr;
func(buf, bufLength, _attrParsePolygonNode, loader);
return loader->svgParse->node;
}
static SvgNode* _createPolylineNode(SvgLoaderData* loader, SvgNode* parent, const char* buf, unsigned bufLength, parseAttributes func)
{
loader->svgParse->node = _createNode(parent, SvgNodeType::Polyline);
if (!loader->svgParse->node) return nullptr;
func(buf, bufLength, _attrParsePolygonNode, loader);
return loader->svgParse->node;
}
static constexpr struct
{
const char* tag;
SvgParserLengthType type;
int sz;
size_t offset;
} rectTags[] = {
{"x", SvgParserLengthType::Horizontal, sizeof("x"), offsetof(SvgRectNode, x)},
{"y", SvgParserLengthType::Vertical, sizeof("y"), offsetof(SvgRectNode, y)},
{"width", SvgParserLengthType::Horizontal, sizeof("width"), offsetof(SvgRectNode, w)},
{"height", SvgParserLengthType::Vertical, sizeof("height"), offsetof(SvgRectNode, h)},
{"rx", SvgParserLengthType::Horizontal, sizeof("rx"), offsetof(SvgRectNode, rx)},
{"ry", SvgParserLengthType::Vertical, sizeof("ry"), offsetof(SvgRectNode, ry)}
};
/* parse the attributes for a rect element.
* https://www.w3.org/TR/SVG/shapes.html#RectElement
*/
static bool _attrParseRectNode(void* data, const char* key, const char* value)
{
auto loader = (SvgLoaderData*)data;
auto node = loader->svgParse->node;
auto rect = &node->node.rect;
unsigned char* array;
bool ret = true;
int sz = strlen(key);
array = (unsigned char*)rect;
for (unsigned int i = 0; i < sizeof(rectTags) / sizeof(rectTags[0]); i++) {
if (rectTags[i].sz - 1 == sz && !strncmp(rectTags[i].tag, key, sz)) {
*((float*)(array + rectTags[i].offset)) = _toFloat(loader->svgParse, value, rectTags[i].type);
//Case if only rx or ry is declared
if (!strncmp(rectTags[i].tag, "rx", sz)) rect->hasRx = true;
if (!strncmp(rectTags[i].tag, "ry", sz)) rect->hasRy = true;
if ((rect->rx >= FLOAT_EPSILON) && (rect->ry < FLOAT_EPSILON) && rect->hasRx && !rect->hasRy) rect->ry = rect->rx;
if ((rect->ry >= FLOAT_EPSILON) && (rect->rx < FLOAT_EPSILON) && !rect->hasRx && rect->hasRy) rect->rx = rect->ry;
return ret;
}
}
if (STR_AS(key, "id")) _copyId(&node->id, value);
else if (STR_AS(key, "class")) _handleCssClassAttr(loader, node, value);
else if (STR_AS(key, "style")) ret = xmlParseW3CAttribute(value, strlen(value), _parseStyleAttr, loader);
else if (STR_AS(key, "clip-path")) _handleClipPathAttr(loader, node, value);
else if (STR_AS(key, "mask")) _handleMaskAttr(loader, node, value);
else if (STR_AS(key, "filter")) _handleFilterAttr(loader, node, value);
else ret = _parseStyleAttr(loader, key, value, false);
return ret;
}
static SvgNode* _createRectNode(SvgLoaderData* loader, SvgNode* parent, const char* buf, unsigned bufLength, parseAttributes func)
{
loader->svgParse->node = _createNode(parent, SvgNodeType::Rect);
if (!loader->svgParse->node) return nullptr;
func(buf, bufLength, _attrParseRectNode, loader);
return loader->svgParse->node;
}
static constexpr struct
{
const char* tag;
SvgParserLengthType type;
int sz;
size_t offset;
} lineTags[] = {
{"x1", SvgParserLengthType::Horizontal, sizeof("x1"), offsetof(SvgLineNode, x1)},
{"y1", SvgParserLengthType::Vertical, sizeof("y1"), offsetof(SvgLineNode, y1)},
{"x2", SvgParserLengthType::Horizontal, sizeof("x2"), offsetof(SvgLineNode, x2)},
{"y2", SvgParserLengthType::Vertical, sizeof("y2"), offsetof(SvgLineNode, y2)}
};
/* parse the attributes for a line element.
* https://www.w3.org/TR/SVG/shapes.html#LineElement
*/
static bool _attrParseLineNode(void* data, const char* key, const char* value)
{
auto loader = (SvgLoaderData*)data;
auto node = loader->svgParse->node;
auto line = &node->node.line;
unsigned char* array;
int sz = strlen(key);
array = (unsigned char*)line;
for (unsigned int i = 0; i < sizeof(lineTags) / sizeof(lineTags[0]); i++) {
if (lineTags[i].sz - 1 == sz && !strncmp(lineTags[i].tag, key, sz)) {
*((float*)(array + lineTags[i].offset)) = _toFloat(loader->svgParse, value, lineTags[i].type);
return true;
}
}
if (STR_AS(key, "id")) _copyId(&node->id, value);
else if (STR_AS(key, "class")) _handleCssClassAttr(loader, node, value);
else if (STR_AS(key, "style")) return xmlParseW3CAttribute(value, strlen(value), _parseStyleAttr, loader);
else if (STR_AS(key, "clip-path")) _handleClipPathAttr(loader, node, value);
else if (STR_AS(key, "mask")) _handleMaskAttr(loader, node, value);
else if (STR_AS(key, "filter")) _handleFilterAttr(loader, node, value);
else return _parseStyleAttr(loader, key, value, false);
return true;
}
static SvgNode* _createLineNode(SvgLoaderData* loader, SvgNode* parent, const char* buf, unsigned bufLength, parseAttributes func)
{
loader->svgParse->node = _createNode(parent, SvgNodeType::Line);
if (!loader->svgParse->node) return nullptr;
func(buf, bufLength, _attrParseLineNode, loader);
return loader->svgParse->node;
}
static char* _idFromHref(const char* href)
{
href = svgUtilSkipWhiteSpace(href, nullptr);
if ((*href) == '#') href++;
return duplicate(href);
}
static constexpr struct
{
const char* tag;
SvgParserLengthType type;
int sz;
size_t offset;
} imageTags[] = {
{"x", SvgParserLengthType::Horizontal, sizeof("x"), offsetof(SvgRectNode, x)},
{"y", SvgParserLengthType::Vertical, sizeof("y"), offsetof(SvgRectNode, y)},
{"width", SvgParserLengthType::Horizontal, sizeof("width"), offsetof(SvgRectNode, w)},
{"height", SvgParserLengthType::Vertical, sizeof("height"), offsetof(SvgRectNode, h)},
};
/* parse the attributes for a image element.
* https://www.w3.org/TR/SVG/embedded.html#ImageElement
*/
static bool _attrParseImageNode(void* data, const char* key, const char* value)
{
SvgLoaderData* loader = (SvgLoaderData*)data;
SvgNode* node = loader->svgParse->node;
SvgImageNode* image = &(node->node.image);
unsigned char* array;
int sz = strlen(key);
array = (unsigned char*)image;
for (unsigned int i = 0; i < sizeof(imageTags) / sizeof(imageTags[0]); i++) {
if (imageTags[i].sz - 1 == sz && !strncmp(imageTags[i].tag, key, sz)) {
*((float*)(array + imageTags[i].offset)) = _toFloat(loader->svgParse, value, imageTags[i].type);
return true;
}
}
if (STR_AS(key, "href") || STR_AS(key, "xlink:href")) {
if (value) tvg::free(image->href);
image->href = _idFromHref(value);
} else if (STR_AS(key, "id")) _copyId(&node->id, value);
else if (STR_AS(key, "class")) _handleCssClassAttr(loader, node, value);
else if (STR_AS(key, "style")) return xmlParseW3CAttribute(value, strlen(value), _parseStyleAttr, loader);
else if (STR_AS(key, "clip-path")) _handleClipPathAttr(loader, node, value);
else if (STR_AS(key, "mask")) _handleMaskAttr(loader, node, value);
else if (STR_AS(key, "filter")) _handleFilterAttr(loader, node, value);
else if (STR_AS(key, "transform")) node->transform = _parseTransformationMatrix(value);
else return _parseStyleAttr(loader, key, value);
return true;
}
static SvgNode* _createImageNode(SvgLoaderData* loader, SvgNode* parent, const char* buf, unsigned bufLength, parseAttributes func)
{
loader->svgParse->node = _createNode(parent, SvgNodeType::Image);
if (!loader->svgParse->node) return nullptr;
func(buf, bufLength, _attrParseImageNode, loader);
return loader->svgParse->node;
}
static char* _unquote(const char* str)
{
auto len = str ? strlen(str) : 0;
if (len >= 2 && str[0] == '\'' && str[len - 1] == '\'') return duplicate(str + 1, len - 2);
return duplicate(str);
}
static bool _attrParseFontFace(void* data, const char* key, const char* value)
{
if (!key || !value) return false;
key = svgUtilSkipWhiteSpace(key, nullptr);
value = svgUtilSkipWhiteSpace(value, nullptr);
auto loader = (SvgLoaderData*)data;
auto& font = loader->fonts.last();
if (STR_AS(key, "font-family")) {
if (font.name) tvg::free(font.name);
font.name = _unquote(value);
} else if (STR_AS(key, "src")) {
font.srcLen = _srcFromUrl(value, font.src);
}
return true;
}
static void _createFontFace(SvgLoaderData* loader, const char* buf, unsigned bufLength, parseAttributes func)
{
loader->fonts.push(FontFace());
func(buf, bufLength, _attrParseFontFace, loader);
}
static SvgNode* _getDefsNode(SvgNode* node)
{
if (!node) return nullptr;
while (node->parent) {
node = node->parent;
}
if (node->type == SvgNodeType::Doc) return node->node.doc.defs;
if (node->type == SvgNodeType::Defs) return node;
return nullptr;
}
static SvgNode* _findNodeById(SvgNode *node, const char* id)
{
if (!node) return nullptr;
if (node->id && STR_AS(node->id, id)) return node;
if (node->child.count > 0) {
ARRAY_FOREACH(p, node->child) {
if (auto result = _findNodeById(*p, id)) return result;
}
}
return nullptr;
}
static SvgNode* _findParentById(SvgNode* node, char* id, SvgNode* doc)
{
SvgNode *parent = node->parent;
while (parent != nullptr && parent != doc) {
if (parent->id && STR_AS(parent->id, id)) {
return parent;
}
parent = parent->parent;
}
return nullptr;
}
static bool _checkPostponed(SvgNode* node, SvgNode* cloneNode, int depth)
{
if (node == cloneNode) return true;
if (depth == 512) {
TVGERR("SVG", "Infinite recursive call - stopped after %d calls! Svg file may be incorrectly formatted.", depth);
return false;
}
ARRAY_FOREACH(p, node->child) {
if (_checkPostponed(*p, cloneNode, depth + 1)) return true;
}
return false;
}
static constexpr struct
{
const char* tag;
SvgParserLengthType type;
int sz;
size_t offset;
} useTags[] = {
{"x", SvgParserLengthType::Horizontal, sizeof("x"), offsetof(SvgUseNode, x)},
{"y", SvgParserLengthType::Vertical, sizeof("y"), offsetof(SvgUseNode, y)},
{"width", SvgParserLengthType::Horizontal, sizeof("width"), offsetof(SvgUseNode, w)},
{"height", SvgParserLengthType::Vertical, sizeof("height"), offsetof(SvgUseNode, h)}
};
static void _cloneNode(SvgNode* from, SvgNode* parent, int depth);
static bool _attrParseUseNode(void* data, const char* key, const char* value)
{
SvgLoaderData* loader = (SvgLoaderData*)data;
SvgNode *defs, *nodeFrom, *node = loader->svgParse->node;
char* id;
SvgUseNode* use = &(node->node.use);
int sz = strlen(key);
unsigned char* array = (unsigned char*)use;
for (unsigned int i = 0; i < sizeof(useTags) / sizeof(useTags[0]); i++) {
if (useTags[i].sz - 1 == sz && !strncmp(useTags[i].tag, key, sz)) {
*((float*)(array + useTags[i].offset)) = _toFloat(loader->svgParse, value, useTags[i].type);
if (useTags[i].offset == offsetof(SvgUseNode, w)) use->isWidthSet = true;
else if (useTags[i].offset == offsetof(SvgUseNode, h)) use->isHeightSet = true;
return true;
}
}
if (STR_AS(key, "href") || STR_AS(key, "xlink:href")) {
id = _idFromHref(value);
defs = _getDefsNode(node);
nodeFrom = _findNodeById(defs, id);
if (nodeFrom) {
if (!_findParentById(node, id, loader->doc)) {
//Check if none of nodeFrom's children are in the cloneNodes list
auto postpone = false;
INLIST_FOREACH(loader->cloneNodes, pair) {
if (_checkPostponed(nodeFrom, pair->node, 1)) {
postpone = true;
loader->cloneNodes.back(new(tvg::malloc<SvgNodeIdPair>(sizeof(SvgNodeIdPair))) SvgNodeIdPair(node, id));
break;
}
}
//None of the children of nodeFrom are on the cloneNodes list, so it can be cloned immediately
if (!postpone) {
_cloneNode(nodeFrom, node, 0);
if (nodeFrom->type == SvgNodeType::Symbol) use->symbol = nodeFrom;
tvg::free(id);
}
} else {
TVGLOG("SVG", "%s is ancestor element. This reference is invalid.", id);
tvg::free(id);
}
} else {
//some svg export software include <defs> element at the end of the file
//if so the 'from' element won't be found now and we have to repeat finding
//after the whole file is parsed
loader->cloneNodes.back(new(tvg::malloc<SvgNodeIdPair>(sizeof(SvgNodeIdPair))) SvgNodeIdPair(node, id));
}
} else {
return _attrParseGNode(data, key, value);
}
return true;
}
static SvgNode* _createUseNode(SvgLoaderData* loader, SvgNode* parent, const char* buf, unsigned bufLength, parseAttributes func)
{
loader->svgParse->node = _createNode(parent, SvgNodeType::Use);
if (!loader->svgParse->node) return nullptr;
func(buf, bufLength, _attrParseUseNode, loader);
return loader->svgParse->node;
}
static constexpr struct
{
const char* tag;
SvgParserLengthType type;
int sz;
size_t offset;
} textTags[] = {
{"x", SvgParserLengthType::Horizontal, sizeof("x"), offsetof(SvgTextNode, x)},
{"y", SvgParserLengthType::Vertical, sizeof("y"), offsetof(SvgTextNode, y)},
{"font-size", SvgParserLengthType::Vertical, sizeof("font-size"), offsetof(SvgTextNode, fontSize)}
};
static bool _attrParseTextNode(void* data, const char* key, const char* value)
{
auto loader = (SvgLoaderData*)data;
auto node = loader->svgParse->node;
auto text = &node->node.text;
unsigned char* array;
int sz = strlen(key);
array = (unsigned char*)text;
for (unsigned int i = 0; i < sizeof(textTags) / sizeof(textTags[0]); i++) {
if (textTags[i].sz - 1 == sz && !strncmp(textTags[i].tag, key, sz)) {
*((float*)(array + textTags[i].offset)) = _toFloat(loader->svgParse, value, textTags[i].type);
return true;
}
}
if (STR_AS(key, "font-family")) svgUtilReplace(&text->fontFamily, value);
else if (STR_AS(key, "style")) return xmlParseW3CAttribute(value, strlen(value), _parseStyleAttr, loader);
else if (STR_AS(key, "clip-path")) _handleClipPathAttr(loader, node, value);
else if (STR_AS(key, "mask")) _handleMaskAttr(loader, node, value);
else if (STR_AS(key, "filter")) _handleFilterAttr(loader, node, value);
else if (STR_AS(key, "id")) _copyId(&node->id, value);
else if (STR_AS(key, "class")) _handleCssClassAttr(loader, node, value);
else return _parseStyleAttr(loader, key, value, false);
return true;
}
static SvgNode* _createTextNode(SvgLoaderData* loader, SvgNode* parent, const char* buf, unsigned bufLength, parseAttributes func)
{
loader->svgParse->node = _createNode(parent, SvgNodeType::Text);
if (!loader->svgParse->node) return nullptr;
//TODO: support the def font and size as used in a system?
loader->svgParse->node->node.text.fontSize = 10.0f;
func(buf, bufLength, _attrParseTextNode, loader);
return loader->svgParse->node;
}
static constexpr struct
{
const char* tag;
int sz;
FactoryMethod tagHandler;
} graphicsTags[] = {
{"use", sizeof("use"), _createUseNode},
{"circle", sizeof("circle"), _createCircleNode},
{"ellipse", sizeof("ellipse"), _createEllipseNode},
{"path", sizeof("path"), _createPathNode},
{"polygon", sizeof("polygon"), _createPolygonNode},
{"rect", sizeof("rect"), _createRectNode},
{"polyline", sizeof("polyline"), _createPolylineNode},
{"line", sizeof("line"), _createLineNode},
{"image", sizeof("image"), _createImageNode},
{"text", sizeof("text"), _createTextNode},
{"feGaussianBlur", sizeof("feGaussianBlur"), _createGaussianBlurNode}
};
static constexpr struct
{
const char* tag;
int sz;
FactoryMethod tagHandler;
} groupTags[] = {
{"defs", sizeof("defs"), _createDefsNode},
{"g", sizeof("g"), _createGNode},
{"svg", sizeof("svg"), _createSvgNode},
{"mask", sizeof("mask"), _createMaskNode},
{"clipPath", sizeof("clipPath"), _createClipPathNode},
{"style", sizeof("style"), _createCssStyleNode},
{"symbol", sizeof("symbol"), _createSymbolNode},
{"filter", sizeof("filter"), _createFilterNode}
};
#define FIND_FACTORY(Short_Name, Tags_Array) \
static FactoryMethod \
_find##Short_Name##Factory(const char* name) \
{ \
unsigned int i; \
int sz = strlen(name); \
\
for (i = 0; i < sizeof(Tags_Array) / sizeof(Tags_Array[0]); i++) { \
if (Tags_Array[i].sz - 1 == sz && !strncmp(Tags_Array[i].tag, name, sz)) { \
return Tags_Array[i].tagHandler; \
} \
} \
return nullptr; \
}
FIND_FACTORY(Group, groupTags)
FIND_FACTORY(Graphics, graphicsTags)
FillSpread _parseSpreadValue(const char* value)
{
auto spread = FillSpread::Pad;
if (STR_AS(value, "reflect")) {
spread = FillSpread::Reflect;
} else if (STR_AS(value, "repeat")) {
spread = FillSpread::Repeat;
}
return spread;
}
static void _handleRadialCxAttr(SvgLoaderData* loader, SvgRadialGradient* radial, const char* value)
{
radial->cx = _gradientToFloat(loader->svgParse, value, radial->isCxPercentage);
if (!loader->svgParse->gradient.parsedFx) {
radial->fx = radial->cx;
radial->isFxPercentage = radial->isCxPercentage;
}
}
static void _handleRadialCyAttr(SvgLoaderData* loader, SvgRadialGradient* radial, const char* value)
{
radial->cy = _gradientToFloat(loader->svgParse, value, radial->isCyPercentage);
if (!loader->svgParse->gradient.parsedFy) {
radial->fy = radial->cy;
radial->isFyPercentage = radial->isCyPercentage;
}
}
static void _handleRadialFxAttr(SvgLoaderData* loader, SvgRadialGradient* radial, const char* value)
{
radial->fx = _gradientToFloat(loader->svgParse, value, radial->isFxPercentage);
loader->svgParse->gradient.parsedFx = true;
}
static void _handleRadialFyAttr(SvgLoaderData* loader, SvgRadialGradient* radial, const char* value)
{
radial->fy = _gradientToFloat(loader->svgParse, value, radial->isFyPercentage);
loader->svgParse->gradient.parsedFy = true;
}
static void _handleRadialFrAttr(SvgLoaderData* loader, SvgRadialGradient* radial, const char* value)
{
radial->fr = _gradientToFloat(loader->svgParse, value, radial->isFrPercentage);
}
static void _handleRadialRAttr(SvgLoaderData* loader, SvgRadialGradient* radial, const char* value)
{
radial->r = _gradientToFloat(loader->svgParse, value, radial->isRPercentage);
}
static void _recalcRadialCxAttr(SvgLoaderData* loader, SvgRadialGradient* radial, bool userSpace)
{
if (userSpace && !radial->isCxPercentage) radial->cx = radial->cx / loader->svgParse->global.w;
}
static void _recalcRadialCyAttr(SvgLoaderData* loader, SvgRadialGradient* radial, bool userSpace)
{
if (userSpace && !radial->isCyPercentage) radial->cy = radial->cy / loader->svgParse->global.h;
}
static void _recalcRadialFxAttr(SvgLoaderData* loader, SvgRadialGradient* radial, bool userSpace)
{
if (userSpace && !radial->isFxPercentage) radial->fx = radial->fx / loader->svgParse->global.w;
}
static void _recalcRadialFyAttr(SvgLoaderData* loader, SvgRadialGradient* radial, bool userSpace)
{
if (userSpace && !radial->isFyPercentage) radial->fy = radial->fy / loader->svgParse->global.h;
}
static void _recalcRadialFrAttr(SvgLoaderData* loader, SvgRadialGradient* radial, bool userSpace)
{
// scaling factor based on the Units paragraph from : https://www.w3.org/TR/2015/WD-SVG2-20150915/coords.html
if (userSpace && !radial->isFrPercentage) radial->fr = radial->fr / (sqrtf(powf(loader->svgParse->global.h, 2) + powf(loader->svgParse->global.w, 2)) / sqrtf(2.0));
}
static void _recalcRadialRAttr(SvgLoaderData* loader, SvgRadialGradient* radial, bool userSpace)
{
// scaling factor based on the Units paragraph from : https://www.w3.org/TR/2015/WD-SVG2-20150915/coords.html
if (userSpace && !radial->isRPercentage) radial->r = radial->r / (sqrtf(powf(loader->svgParse->global.h, 2) + powf(loader->svgParse->global.w, 2)) / sqrtf(2.0));
}
static void _recalcInheritedRadialCxAttr(SvgLoaderData* loader, SvgRadialGradient* radial, bool userSpace)
{
if (!radial->isCxPercentage) {
if (userSpace) radial->cx /= loader->svgParse->global.w;
else radial->cx *= loader->svgParse->global.w;
}
}
static void _recalcInheritedRadialCyAttr(SvgLoaderData* loader, SvgRadialGradient* radial, bool userSpace)
{
if (!radial->isCyPercentage) {
if (userSpace) radial->cy /= loader->svgParse->global.h;
else radial->cy *= loader->svgParse->global.h;
}
}
static void _recalcInheritedRadialFxAttr(SvgLoaderData* loader, SvgRadialGradient* radial, bool userSpace)
{
if (!radial->isFxPercentage) {
if (userSpace) radial->fx /= loader->svgParse->global.w;
else radial->fx *= loader->svgParse->global.w;
}
}
static void _recalcInheritedRadialFyAttr(SvgLoaderData* loader, SvgRadialGradient* radial, bool userSpace)
{
if (!radial->isFyPercentage) {
if (userSpace) radial->fy /= loader->svgParse->global.h;
else radial->fy *= loader->svgParse->global.h;
}
}
static void _recalcInheritedRadialFrAttr(SvgLoaderData* loader, SvgRadialGradient* radial, bool userSpace)
{
if (!radial->isFrPercentage) {
if (userSpace) radial->fr /= sqrtf(powf(loader->svgParse->global.h, 2) + powf(loader->svgParse->global.w, 2)) / sqrtf(2.0);
else radial->fr *= sqrtf(powf(loader->svgParse->global.h, 2) + powf(loader->svgParse->global.w, 2)) / sqrtf(2.0);
}
}
static void _recalcInheritedRadialRAttr(SvgLoaderData* loader, SvgRadialGradient* radial, bool userSpace)
{
if (!radial->isRPercentage) {
if (userSpace) radial->r /= sqrtf(powf(loader->svgParse->global.h, 2) + powf(loader->svgParse->global.w, 2)) / sqrtf(2.0);
else radial->r *= sqrtf(powf(loader->svgParse->global.h, 2) + powf(loader->svgParse->global.w, 2)) / sqrtf(2.0);
}
}
static void _inheritRadialCxAttr(SvgStyleGradient* to, SvgStyleGradient* from)
{
to->radial->cx = from->radial->cx;
to->radial->isCxPercentage = from->radial->isCxPercentage;
to->flags = (to->flags | SvgGradientFlags::Cx);
}
static void _inheritRadialCyAttr(SvgStyleGradient* to, SvgStyleGradient* from)
{
to->radial->cy = from->radial->cy;
to->radial->isCyPercentage = from->radial->isCyPercentage;
to->flags = (to->flags | SvgGradientFlags::Cy);
}
static void _inheritRadialFxAttr(SvgStyleGradient* to, SvgStyleGradient* from)
{
to->radial->fx = from->radial->fx;
to->radial->isFxPercentage = from->radial->isFxPercentage;
to->flags = (to->flags | SvgGradientFlags::Fx);
}
static void _inheritRadialFyAttr(SvgStyleGradient* to, SvgStyleGradient* from)
{
to->radial->fy = from->radial->fy;
to->radial->isFyPercentage = from->radial->isFyPercentage;
to->flags = (to->flags | SvgGradientFlags::Fy);
}
static void _inheritRadialFrAttr(SvgStyleGradient* to, SvgStyleGradient* from)
{
to->radial->fr = from->radial->fr;
to->radial->isFrPercentage = from->radial->isFrPercentage;
to->flags = (to->flags | SvgGradientFlags::Fr);
}
static void _inheritRadialRAttr(SvgStyleGradient* to, SvgStyleGradient* from)
{
to->radial->r = from->radial->r;
to->radial->isRPercentage = from->radial->isRPercentage;
to->flags = (to->flags | SvgGradientFlags::R);
}
typedef void (*radialMethod)(SvgLoaderData* loader, SvgRadialGradient* radial, const char* value);
typedef void (*radialInheritMethod)(SvgStyleGradient* to, SvgStyleGradient* from);
typedef void (*radialMethodRecalc)(SvgLoaderData* loader, SvgRadialGradient* radial, bool userSpace);
#define RADIAL_DEF(Name, Name1, Flag) \
{ \
#Name, sizeof(#Name), _handleRadial##Name1##Attr, _inheritRadial##Name1##Attr, _recalcRadial##Name1##Attr, _recalcInheritedRadial##Name1##Attr, Flag \
}
static constexpr struct
{
const char* tag;
int sz;
radialMethod tagHandler;
radialInheritMethod tagInheritHandler;
radialMethodRecalc tagRecalc;
radialMethodRecalc tagInheritedRecalc;
SvgGradientFlags flag;
} radialTags[] = {
RADIAL_DEF(cx, Cx, SvgGradientFlags::Cx),
RADIAL_DEF(cy, Cy, SvgGradientFlags::Cy),
RADIAL_DEF(fx, Fx, SvgGradientFlags::Fx),
RADIAL_DEF(fy, Fy, SvgGradientFlags::Fy),
RADIAL_DEF(r, R, SvgGradientFlags::R),
RADIAL_DEF(fr, Fr, SvgGradientFlags::Fr)
};
static bool _attrParseRadialGradientNode(void* data, const char* key, const char* value)
{
auto loader = (SvgLoaderData*)data;
auto grad = loader->svgParse->styleGrad;
auto radial = grad->radial;
int sz = strlen(key);
for (unsigned int i = 0; i < sizeof(radialTags) / sizeof(radialTags[0]); i++) {
if (radialTags[i].sz - 1 == sz && !strncmp(radialTags[i].tag, key, sz)) {
radialTags[i].tagHandler(loader, radial, value);
grad->flags = (grad->flags | radialTags[i].flag);
return true;
}
}
if (STR_AS(key, "id")) {
_copyId(&grad->id, value);
} else if (STR_AS(key, "spreadMethod")) {
grad->spread = _parseSpreadValue(value);
grad->flags = (grad->flags | SvgGradientFlags::SpreadMethod);
} else if (STR_AS(key, "href") || STR_AS(key, "xlink:href")) {
if (value) tvg::free(grad->ref);
grad->ref = _idFromHref(value);
} else if (STR_AS(key, "gradientUnits")) {
if (STR_AS(value, "userSpaceOnUse")) grad->userSpace = true;
grad->flags = (grad->flags | SvgGradientFlags::GradientUnits);
} else if (STR_AS(key, "gradientTransform")) {
grad->transform = _parseTransformationMatrix(value);
} else {
return false;
}
return true;
}
static SvgStyleGradient* _createRadialGradient(SvgLoaderData* loader, const char* buf, unsigned bufLength)
{
auto grad = tvg::calloc<SvgStyleGradient>(1, sizeof(SvgStyleGradient));
loader->svgParse->styleGrad = grad;
grad->flags = SvgGradientFlags::None;
grad->type = SvgGradientType::Radial;
grad->radial = tvg::calloc<SvgRadialGradient>(1, sizeof(SvgRadialGradient));
// default values of gradient transformed into global percentage
grad->radial->cx = 0.5f;
grad->radial->cy = 0.5f;
grad->radial->fx = 0.5f;
grad->radial->fy = 0.5f;
grad->radial->r = 0.5f;
grad->radial->isCxPercentage = true;
grad->radial->isCyPercentage = true;
grad->radial->isFxPercentage = true;
grad->radial->isFyPercentage = true;
grad->radial->isRPercentage = true;
grad->radial->isFrPercentage = true;
loader->svgParse->gradient.parsedFx = false;
loader->svgParse->gradient.parsedFy = false;
xmlParseAttributes(buf, bufLength,
_attrParseRadialGradientNode, loader);
for (unsigned int i = 0; i < sizeof(radialTags) / sizeof(radialTags[0]); i++) {
radialTags[i].tagRecalc(loader, grad->radial, grad->userSpace);
}
return loader->svgParse->styleGrad;
}
static SvgColor* _findLatestColor(const SvgLoaderData* loader)
{
auto parent = loader->stack.count > 0 ? loader->stack.last() : loader->doc;
while (parent != nullptr) {
if (parent->style->curColorSet) return &parent->style->color;
parent = parent->parent;
}
return nullptr;
}
static bool _attrParseStopsStyle(void* data, const char* key, const char* value)
{
SvgLoaderData* loader = (SvgLoaderData*)data;
auto stop = &loader->svgParse->gradStop;
if (STR_AS(key, "stop-opacity")) {
stop->a = _toOpacity(value);
loader->svgParse->flags = (loader->svgParse->flags | SvgStopStyleFlags::StopOpacity);
} else if (STR_AS(key, "stop-color")) {
if (STR_AS(value, "currentColor")) {
if (auto latestColor = _findLatestColor(loader)) {
stop->r = latestColor->r;
stop->g = latestColor->g;
stop->b = latestColor->b;
}
} else if (_toColor(value, stop->r, stop->g, stop->b, nullptr)) {
loader->svgParse->flags = (loader->svgParse->flags | SvgStopStyleFlags::StopColor);
}
} else {
return false;
}
return true;
}
static bool _attrParseStops(void* data, const char* key, const char* value)
{
SvgLoaderData* loader = (SvgLoaderData*)data;
auto stop = &loader->svgParse->gradStop;
if (STR_AS(key, "offset")) {
stop->offset = _toOffset(value);
} else if (STR_AS(key, "stop-opacity")) {
if (!(loader->svgParse->flags & SvgStopStyleFlags::StopOpacity)) {
stop->a = _toOpacity(value);
}
} else if (STR_AS(key, "stop-color")) {
if (STR_AS(value, "currentColor")) {
if (auto latestColor = _findLatestColor(loader)) {
stop->r = latestColor->r;
stop->g = latestColor->g;
stop->b = latestColor->b;
}
} else if (!(loader->svgParse->flags & SvgStopStyleFlags::StopColor)) {
_toColor(value, stop->r, stop->g, stop->b, nullptr);
}
} else if (STR_AS(key, "style")) {
xmlParseW3CAttribute(value, strlen(value), _attrParseStopsStyle, data);
} else {
return false;
}
return true;
}
static void _handleLinearX1Attr(SvgLoaderData* loader, SvgLinearGradient* linear, const char* value)
{
linear->x1 = _gradientToFloat(loader->svgParse, value, linear->isX1Percentage);
}
static void _handleLinearY1Attr(SvgLoaderData* loader, SvgLinearGradient* linear, const char* value)
{
linear->y1 = _gradientToFloat(loader->svgParse, value, linear->isY1Percentage);
}
static void _handleLinearX2Attr(SvgLoaderData* loader, SvgLinearGradient* linear, const char* value)
{
linear->x2 = _gradientToFloat(loader->svgParse, value, linear->isX2Percentage);
}
static void _handleLinearY2Attr(SvgLoaderData* loader, SvgLinearGradient* linear, const char* value)
{
linear->y2 = _gradientToFloat(loader->svgParse, value, linear->isY2Percentage);
}
static void _recalcLinearX1Attr(SvgLoaderData* loader, SvgLinearGradient* linear, bool userSpace)
{
if (userSpace && !linear->isX1Percentage) linear->x1 = linear->x1 / loader->svgParse->global.w;
}
static void _recalcLinearY1Attr(SvgLoaderData* loader, SvgLinearGradient* linear, bool userSpace)
{
if (userSpace && !linear->isY1Percentage) linear->y1 = linear->y1 / loader->svgParse->global.h;
}
static void _recalcLinearX2Attr(SvgLoaderData* loader, SvgLinearGradient* linear, bool userSpace)
{
if (userSpace && !linear->isX2Percentage) linear->x2 = linear->x2 / loader->svgParse->global.w;
}
static void _recalcLinearY2Attr(SvgLoaderData* loader, SvgLinearGradient* linear, bool userSpace)
{
if (userSpace && !linear->isY2Percentage) linear->y2 = linear->y2 / loader->svgParse->global.h;
}
static void _recalcInheritedLinearX1Attr(SvgLoaderData* loader, SvgLinearGradient* linear, bool userSpace)
{
if (!linear->isX1Percentage) {
if (userSpace) linear->x1 /= loader->svgParse->global.w;
else linear->x1 *= loader->svgParse->global.w;
}
}
static void _recalcInheritedLinearX2Attr(SvgLoaderData* loader, SvgLinearGradient* linear, bool userSpace)
{
if (!linear->isX2Percentage) {
if (userSpace) linear->x2 /= loader->svgParse->global.w;
else linear->x2 *= loader->svgParse->global.w;
}
}
static void _recalcInheritedLinearY1Attr(SvgLoaderData* loader, SvgLinearGradient* linear, bool userSpace)
{
if (!linear->isY1Percentage) {
if (userSpace) linear->y1 /= loader->svgParse->global.h;
else linear->y1 *= loader->svgParse->global.h;
}
}
static void _recalcInheritedLinearY2Attr(SvgLoaderData* loader, SvgLinearGradient* linear, bool userSpace)
{
if (!linear->isY2Percentage) {
if (userSpace) linear->y2 /= loader->svgParse->global.h;
else linear->y2 *= loader->svgParse->global.h;
}
}
static void _inheritLinearX1Attr(SvgStyleGradient* to, SvgStyleGradient* from)
{
to->linear->x1 = from->linear->x1;
to->linear->isX1Percentage = from->linear->isX1Percentage;
to->flags = (to->flags | SvgGradientFlags::X1);
}
static void _inheritLinearX2Attr(SvgStyleGradient* to, SvgStyleGradient* from)
{
to->linear->x2 = from->linear->x2;
to->linear->isX2Percentage = from->linear->isX2Percentage;
to->flags = (to->flags | SvgGradientFlags::X2);
}
static void _inheritLinearY1Attr(SvgStyleGradient* to, SvgStyleGradient* from)
{
to->linear->y1 = from->linear->y1;
to->linear->isY1Percentage = from->linear->isY1Percentage;
to->flags = (to->flags | SvgGradientFlags::Y1);
}
static void _inheritLinearY2Attr(SvgStyleGradient* to, SvgStyleGradient* from)
{
to->linear->y2 = from->linear->y2;
to->linear->isY2Percentage = from->linear->isY2Percentage;
to->flags = (to->flags | SvgGradientFlags::Y2);
}
typedef void (*Linear_Method)(SvgLoaderData* loader, SvgLinearGradient* linear, const char* value);
typedef void (*Linear_Inherit_Method)(SvgStyleGradient* to, SvgStyleGradient* from);
typedef void (*Linear_Method_Recalc)(SvgLoaderData* loader, SvgLinearGradient* linear, bool userSpace);
#define LINEAR_DEF(Name, Name1, Flag) \
{ \
#Name, sizeof(#Name), _handleLinear##Name1##Attr, _inheritLinear##Name1##Attr, _recalcLinear##Name1##Attr, _recalcInheritedLinear##Name1##Attr, Flag \
}
static constexpr struct
{
const char* tag;
int sz;
Linear_Method tagHandler;
Linear_Inherit_Method tagInheritHandler;
Linear_Method_Recalc tagRecalc;
Linear_Method_Recalc tagInheritedRecalc;
SvgGradientFlags flag;
} linear_tags[] = {
LINEAR_DEF(x1, X1, SvgGradientFlags::X1),
LINEAR_DEF(y1, Y1, SvgGradientFlags::Y1),
LINEAR_DEF(x2, X2, SvgGradientFlags::X2),
LINEAR_DEF(y2, Y2, SvgGradientFlags::Y2)
};
static bool _attrParseLinearGradientNode(void* data, const char* key, const char* value)
{
auto loader = (SvgLoaderData*)data;
auto grad = loader->svgParse->styleGrad;
auto linear = grad->linear;
int sz = strlen(key);
for (unsigned int i = 0; i < sizeof(linear_tags) / sizeof(linear_tags[0]); i++) {
if (linear_tags[i].sz - 1 == sz && !strncmp(linear_tags[i].tag, key, sz)) {
linear_tags[i].tagHandler(loader, linear, value);
grad->flags = (grad->flags | linear_tags[i].flag);
return true;
}
}
if (STR_AS(key, "id")) {
_copyId(&grad->id, value);
} else if (STR_AS(key, "spreadMethod")) {
grad->spread = _parseSpreadValue(value);
grad->flags = (grad->flags | SvgGradientFlags::SpreadMethod);
} else if (STR_AS(key, "href") || STR_AS(key, "xlink:href")) {
if (value) tvg::free(grad->ref);
grad->ref = _idFromHref(value);
} else if (STR_AS(key, "gradientUnits")) {
if (STR_AS(value, "userSpaceOnUse")) grad->userSpace = true;
grad->flags = (grad->flags | SvgGradientFlags::GradientUnits);
} else if (STR_AS(key, "gradientTransform")) {
grad->transform = _parseTransformationMatrix(value);
} else {
return false;
}
return true;
}
static SvgStyleGradient* _createLinearGradient(SvgLoaderData* loader, const char* buf, unsigned bufLength)
{
auto grad = tvg::calloc<SvgStyleGradient>(1, sizeof(SvgStyleGradient));
loader->svgParse->styleGrad = grad;
grad->flags = SvgGradientFlags::None;
grad->type = SvgGradientType::Linear;
grad->linear = tvg::calloc<SvgLinearGradient>(1, sizeof(SvgLinearGradient));
// default value of x2 is 100% - transformed to the global percentage
grad->linear->x2 = 1.0f;
grad->linear->isX2Percentage = true;
xmlParseAttributes(buf, bufLength, _attrParseLinearGradientNode, loader);
for (unsigned int i = 0; i < sizeof(linear_tags) / sizeof(linear_tags[0]); i++) {
linear_tags[i].tagRecalc(loader, grad->linear, grad->userSpace);
}
return loader->svgParse->styleGrad;
}
#define GRADIENT_DEF(Name, Name1) \
{ \
#Name, sizeof(#Name), _create##Name1 \
}
/**
* In the case when the gradients lengths are given as numbers (not percentages)
* in the current user coordinate system, they are recalculated into percentages
* related to the canvas width and height.
*/
static constexpr struct
{
const char* tag;
int sz;
GradientFactoryMethod tagHandler;
} gradientTags[] = {
GRADIENT_DEF(linearGradient, LinearGradient),
GRADIENT_DEF(radialGradient, RadialGradient)
};
static GradientFactoryMethod _findGradientFactory(const char* name)
{
int sz = strlen(name);
for (unsigned int i = 0; i < sizeof(gradientTags) / sizeof(gradientTags[0]); i++) {
if (gradientTags[i].sz - 1 == sz && !strncmp(gradientTags[i].tag, name, sz)) {
return gradientTags[i].tagHandler;
}
}
return nullptr;
}
static void _cloneGradStops(Array<Fill::ColorStop>& dst, const Array<Fill::ColorStop>& src)
{
ARRAY_FOREACH(p, src) {
dst.push(*p);
}
}
static void _inheritGradient(SvgLoaderData* loader, SvgStyleGradient* to, SvgStyleGradient* from)
{
if (!to || !from) return;
if (!(to->flags & SvgGradientFlags::SpreadMethod) && (from->flags & SvgGradientFlags::SpreadMethod)) {
to->spread = from->spread;
to->flags = (to->flags | SvgGradientFlags::SpreadMethod);
}
bool gradUnitSet = (to->flags & SvgGradientFlags::GradientUnits);
if (!(to->flags & SvgGradientFlags::GradientUnits) && (from->flags & SvgGradientFlags::GradientUnits)) {
to->userSpace = from->userSpace;
to->flags = (to->flags | SvgGradientFlags::GradientUnits);
}
if (!to->transform && from->transform) {
to->transform = tvg::malloc<Matrix>(sizeof(Matrix));
*to->transform = *from->transform;
}
if (to->type == SvgGradientType::Linear) {
for (unsigned int i = 0; i < sizeof(linear_tags) / sizeof(linear_tags[0]); i++) {
bool coordSet = to->flags & linear_tags[i].flag;
if (!(to->flags & linear_tags[i].flag) && (from->flags & linear_tags[i].flag)) {
linear_tags[i].tagInheritHandler(to, from);
}
//GradUnits not set directly, coord set
if (!gradUnitSet && coordSet) {
linear_tags[i].tagRecalc(loader, to->linear, to->userSpace);
}
//GradUnits set, coord not set directly
if (to->userSpace == from->userSpace) continue;
if (gradUnitSet && !coordSet) {
linear_tags[i].tagInheritedRecalc(loader, to->linear, to->userSpace);
}
}
} else if (to->type == SvgGradientType::Radial) {
for (unsigned int i = 0; i < sizeof(radialTags) / sizeof(radialTags[0]); i++) {
bool coordSet = (to->flags & radialTags[i].flag);
if (!(to->flags & radialTags[i].flag) && (from->flags & radialTags[i].flag)) {
radialTags[i].tagInheritHandler(to, from);
}
//GradUnits not set directly, coord set
if (!gradUnitSet && coordSet) {
radialTags[i].tagRecalc(loader, to->radial, to->userSpace);
//If fx and fy are not set, set cx and cy.
if (STR_AS(radialTags[i].tag, "cx") && !(to->flags & SvgGradientFlags::Fx)) to->radial->fx = to->radial->cx;
if (STR_AS(radialTags[i].tag, "cy") && !(to->flags & SvgGradientFlags::Fy)) to->radial->fy = to->radial->cy;
}
//GradUnits set, coord not set directly
if (to->userSpace == from->userSpace) continue;
if (gradUnitSet && !coordSet) {
//If fx and fx are not set, do not call recalc.
if (STR_AS(radialTags[i].tag, "fx") && !(to->flags & SvgGradientFlags::Fx)) continue;
if (STR_AS(radialTags[i].tag, "fy") && !(to->flags & SvgGradientFlags::Fy)) continue;
radialTags[i].tagInheritedRecalc(loader, to->radial, to->userSpace);
}
}
}
if (to->stops.empty()) _cloneGradStops(to->stops, from->stops);
}
static SvgStyleGradient* _cloneGradient(SvgStyleGradient* from)
{
if (!from) return nullptr;
auto grad = tvg::calloc<SvgStyleGradient>(1, sizeof(SvgStyleGradient));
grad->type = from->type;
_copyId(&grad->id, from->id);
_copyId(&grad->ref, from->ref);
grad->spread = from->spread;
grad->userSpace = from->userSpace;
grad->flags = from->flags;
if (from->transform) {
grad->transform = tvg::calloc<Matrix>(1, sizeof(Matrix));
*grad->transform = *from->transform;
}
if (grad->type == SvgGradientType::Linear) {
grad->linear = tvg::calloc<SvgLinearGradient>(1, sizeof(SvgLinearGradient));
memcpy(grad->linear, from->linear, sizeof(SvgLinearGradient));
} else if (grad->type == SvgGradientType::Radial) {
grad->radial = tvg::calloc<SvgRadialGradient>(1, sizeof(SvgRadialGradient));
memcpy(grad->radial, from->radial, sizeof(SvgRadialGradient));
}
_cloneGradStops(grad->stops, from->stops);
return grad;
}
static void _styleInherit(SvgStyleProperty* child, const SvgStyleProperty* parent)
{
if (!parent) return;
//Inherit the property of parent if not present in child.
if (!child->curColorSet) {
child->color = parent->color;
child->curColorSet = parent->curColorSet;
}
if (!(child->flags & SvgStyleFlags::PaintOrder)) child->paintOrder = parent->paintOrder;
//Fill
if (!(child->fill.flags & SvgFillFlags::Paint)) {
child->fill.paint.color = parent->fill.paint.color;
child->fill.paint.none = parent->fill.paint.none;
child->fill.paint.curColor = parent->fill.paint.curColor;
if (parent->fill.paint.url) _copyId(&child->fill.paint.url, parent->fill.paint.url);
}
if (!(child->fill.flags & SvgFillFlags::Opacity)) child->fill.opacity = parent->fill.opacity;
if (!(child->fill.flags & SvgFillFlags::FillRule)) child->fill.fillRule = parent->fill.fillRule;
//Stroke
if (!(child->stroke.flags & SvgStrokeFlags::Paint)) {
child->stroke.paint.color = parent->stroke.paint.color;
child->stroke.paint.none = parent->stroke.paint.none;
child->stroke.paint.curColor = parent->stroke.paint.curColor;
if (parent->stroke.paint.url) _copyId(&child->stroke.paint.url, parent->stroke.paint.url);
}
if (!(child->stroke.flags & SvgStrokeFlags::Opacity)) child->stroke.opacity = parent->stroke.opacity;
if (!(child->stroke.flags & SvgStrokeFlags::Width)) child->stroke.width = parent->stroke.width;
if (!(child->stroke.flags & SvgStrokeFlags::Dash)) {
if (parent->stroke.dash.array.count > 0) {
child->stroke.dash.array.clear();
child->stroke.dash.array.reserve(parent->stroke.dash.array.count);
ARRAY_FOREACH(p, parent->stroke.dash.array) {
child->stroke.dash.array.push(*p);
}
}
}
if (!(child->stroke.flags & SvgStrokeFlags::DashOffset)) child->stroke.dash.offset = parent->stroke.dash.offset;
if (!(child->stroke.flags & SvgStrokeFlags::Cap)) child->stroke.cap = parent->stroke.cap;
if (!(child->stroke.flags & SvgStrokeFlags::Join)) child->stroke.join = parent->stroke.join;
if (!(child->stroke.flags & SvgStrokeFlags::Miterlimit)) child->stroke.miterlimit = parent->stroke.miterlimit;
}
static void _styleCopy(SvgStyleProperty* to, const SvgStyleProperty* from)
{
if (!from) return;
//Copy the properties of 'from' only if they were explicitly set (not the default ones).
if (from->curColorSet) {
to->color = from->color;
to->curColorSet = true;
}
if (from->flags & SvgStyleFlags::Opacity) to->opacity = from->opacity;
if (from->flags & SvgStyleFlags::PaintOrder) to->paintOrder = from->paintOrder;
if (from->flags & SvgStyleFlags::Display) to->display = from->display;
//Fill
to->fill.flags = (to->fill.flags | from->fill.flags);
if (from->fill.flags & SvgFillFlags::Paint) {
to->fill.paint.color = from->fill.paint.color;
to->fill.paint.none = from->fill.paint.none;
to->fill.paint.curColor = from->fill.paint.curColor;
if (from->fill.paint.url) _copyId(&to->fill.paint.url, from->fill.paint.url);
}
if (from->fill.flags & SvgFillFlags::Opacity) to->fill.opacity = from->fill.opacity;
if (from->fill.flags & SvgFillFlags::FillRule) to->fill.fillRule = from->fill.fillRule;
//Stroke
to->stroke.flags = (to->stroke.flags | from->stroke.flags);
if (from->stroke.flags & SvgStrokeFlags::Paint) {
to->stroke.paint.color = from->stroke.paint.color;
to->stroke.paint.none = from->stroke.paint.none;
to->stroke.paint.curColor = from->stroke.paint.curColor;
if (from->stroke.paint.url) _copyId(&to->stroke.paint.url, from->stroke.paint.url);
}
if (from->stroke.flags & SvgStrokeFlags::Opacity) to->stroke.opacity = from->stroke.opacity;
if (from->stroke.flags & SvgStrokeFlags::Width) to->stroke.width = from->stroke.width;
if (from->stroke.flags & SvgStrokeFlags::Dash) {
if (from->stroke.dash.array.count > 0) {
to->stroke.dash.array.clear();
to->stroke.dash.array.reserve(from->stroke.dash.array.count);
ARRAY_FOREACH(p, from->stroke.dash.array) {
to->stroke.dash.array.push(*p);
}
}
}
if (from->stroke.flags & SvgStrokeFlags::DashOffset) to->stroke.dash.offset = from->stroke.dash.offset;
if (from->stroke.flags & SvgStrokeFlags::Cap) to->stroke.cap = from->stroke.cap;
if (from->stroke.flags & SvgStrokeFlags::Join) to->stroke.join = from->stroke.join;
if (from->stroke.flags & SvgStrokeFlags::Miterlimit) to->stroke.miterlimit = from->stroke.miterlimit;
}
static void _copyAttr(SvgNode* to, const SvgNode* from)
{
//Copy matrix attribute
if (from->transform) {
to->transform = tvg::malloc<Matrix>(sizeof(Matrix));
*to->transform = *from->transform;
}
//Copy style attribute
_styleCopy(to->style, from->style);
to->style->flags = (to->style->flags | from->style->flags);
svgUtilReplace(&to->style->clipPath.url, from->style->clipPath.url);
svgUtilReplace(&to->style->mask.url, from->style->mask.url);
svgUtilReplace(&to->style->filter.url, from->style->filter.url);
//Copy node attribute
switch (from->type) {
case SvgNodeType::Circle: {
to->node.circle = from->node.circle;
break;
}
case SvgNodeType::Ellipse: {
to->node.ellipse = from->node.ellipse;
break;
}
case SvgNodeType::Rect: {
to->node.rect = from->node.rect;
break;
}
case SvgNodeType::Line: {
to->node.line = from->node.line;
break;
}
case SvgNodeType::Path: {
svgUtilReplace(&to->node.path.path, from->node.path.path);
break;
}
case SvgNodeType::Polygon: {
if ((to->node.polygon.pts.count = from->node.polygon.pts.count)) {
to->node.polygon.pts = from->node.polygon.pts;
}
break;
}
case SvgNodeType::Polyline: {
if ((to->node.polyline.pts.count = from->node.polyline.pts.count)) {
to->node.polyline.pts = from->node.polyline.pts;
}
break;
}
case SvgNodeType::Image: {
to->node.image.x = from->node.image.x;
to->node.image.y = from->node.image.y;
to->node.image.w = from->node.image.w;
to->node.image.h = from->node.image.h;
svgUtilReplace(&to->node.image.href, from->node.image.href);
break;
}
case SvgNodeType::Use: {
to->node.use = from->node.use;
break;
}
case SvgNodeType::Text: {
to->node.text.x = from->node.text.x;
to->node.text.y = from->node.text.y;
to->node.text.fontSize = from->node.text.fontSize;
svgUtilReplace(&to->node.text.text, from->node.text.text);
svgUtilReplace(&to->node.text.fontFamily, from->node.text.fontFamily);
break;
}
default: {
break;
}
}
}
static void _cloneNode(SvgNode* from, SvgNode* parent, int depth)
{
/* Exception handling: Prevent invalid SVG data input.
The size is the arbitrary value, we need an experimental size. */
if (depth == 8192) {
TVGERR("SVG", "Infinite recursive call - stopped after %d calls! Svg file may be incorrectly formatted.", depth);
return;
}
SvgNode* newNode;
if (!from || !parent || from == parent) return;
newNode = _createNode(parent, from->type);
if (!newNode) return;
_styleInherit(newNode->style, parent->style);
_copyAttr(newNode, from);
ARRAY_FOREACH(p, from->child) {
_cloneNode(*p, newNode, depth + 1);
}
}
static void _clonePostponedNodes(Inlist<SvgNodeIdPair>* cloneNodes, SvgNode* doc)
{
auto nodeIdPair = cloneNodes->front();
while (nodeIdPair) {
if (!_findParentById(nodeIdPair->node, nodeIdPair->id, doc)) {
//Check if none of nodeFrom's children are in the cloneNodes list
auto postpone = false;
auto nodeFrom = _findNodeById(_getDefsNode(nodeIdPair->node), nodeIdPair->id);
if (!nodeFrom) nodeFrom = _findNodeById(doc, nodeIdPair->id);
if (nodeFrom) {
INLIST_FOREACH((*cloneNodes), pair) {
if (_checkPostponed(nodeFrom, pair->node, 1)) {
postpone = true;
cloneNodes->back(nodeIdPair);
break;
}
}
}
//Since none of the child nodes of nodeFrom are present in the cloneNodes list, it can be cloned immediately
if (!postpone) {
_cloneNode(nodeFrom, nodeIdPair->node, 0);
if (nodeFrom && nodeFrom->type == SvgNodeType::Symbol && nodeIdPair->node->type == SvgNodeType::Use) {
nodeIdPair->node->node.use.symbol = nodeFrom;
}
tvg::free(nodeIdPair->id);
tvg::free(nodeIdPair);
}
} else {
TVGLOG("SVG", "%s is ancestor element. This reference is invalid.", nodeIdPair->id);
tvg::free(nodeIdPair->id);
tvg::free(nodeIdPair);
}
nodeIdPair = cloneNodes->front();
}
}
static void _svgLoaderParserXmlClose(SvgLoaderData* loader, const char* content, unsigned int length)
{
const char* itr = nullptr;
int sz = length;
char tagName[20] = "";
content = svgUtilSkipWhiteSpace(content, nullptr);
itr = content;
while ((itr != nullptr) && *itr != '>') itr++;
if (itr) {
sz = itr - content;
while ((sz > 0) && (isspace(content[sz - 1]))) sz--;
if ((unsigned int)sz >= sizeof(tagName)) sz = sizeof(tagName) - 1;
strncpy(tagName, content, sz);
tagName[sz] = '\0';
}
else return;
for (unsigned int i = 0; i < sizeof(groupTags) / sizeof(groupTags[0]); i++) {
if (!strncmp(tagName, groupTags[i].tag, sz)) {
loader->stack.pop();
break;
}
}
for (unsigned int i = 0; i < sizeof(gradientTags) / sizeof(gradientTags[0]); i++) {
if (!strncmp(tagName, gradientTags[i].tag, sz)) {
loader->gradientStack.pop();
break;
}
}
for (unsigned int i = 0; i < sizeof(graphicsTags) / sizeof(graphicsTags[0]); i++) {
if (!strncmp(tagName, graphicsTags[i].tag, sz)) {
loader->currentGraphicsNode = nullptr;
if (!strncmp(tagName, "text", 4)) loader->openedTag = OpenedTagType::Other;
loader->stack.pop();
break;
}
}
loader->level--;
}
static void _svgLoaderParserXmlOpen(SvgLoaderData* loader, const char* content, unsigned int length, bool empty)
{
const char* attrs = nullptr;
int attrsLength = 0;
int sz = length;
char tagName[20] = "";
FactoryMethod method;
GradientFactoryMethod gradientMethod;
SvgNode *node = nullptr, *parent = nullptr;
loader->level++;
attrs = xmlFindAttributesTag(content, length);
if (!attrs) {
//Parse the empty tag
attrs = content;
while ((attrs != nullptr) && *attrs != '>') attrs++;
if (empty) attrs--;
}
if (attrs) {
//Find out the tag name starting from content till sz length
sz = attrs - content;
while ((sz > 0) && (isspace(content[sz - 1]))) sz--;
if ((unsigned)sz >= sizeof(tagName)) return;
strncpy(tagName, content, sz);
tagName[sz] = '\0';
attrsLength = length - sz;
}
if ((method = _findGroupFactory(tagName))) {
//Group
if (empty) return;
if (!loader->doc) {
if (!STR_AS(tagName, "svg")) return; //Not a valid svg document
node = method(loader, nullptr, attrs, attrsLength, xmlParseAttributes);
loader->doc = node;
} else {
if (STR_AS(tagName, "svg")) return; //Already loaded <svg>(SvgNodeType::Doc) tag
if (loader->stack.count > 0) parent = loader->stack.last();
else parent = loader->doc;
if (STR_AS(tagName, "style")) {
// TODO: For now only the first style node is saved. After the css id selector
// is introduced this if condition shouldn't be necessary any more
if (!loader->cssStyle) {
node = method(loader, nullptr, attrs, attrsLength, xmlParseAttributes);
loader->cssStyle = node;
loader->doc->node.doc.style = node;
loader->openedTag = OpenedTagType::Style;
}
} else {
node = method(loader, parent, attrs, attrsLength, xmlParseAttributes);
}
}
if (!node) return;
if (node->type != SvgNodeType::Defs || !empty) {
loader->stack.push(node);
}
} else if ((method = _findGraphicsFactory(tagName))) {
if (loader->stack.count > 0) parent = loader->stack.last();
else parent = loader->doc;
node = method(loader, parent, attrs, attrsLength, xmlParseAttributes);
if (node && !empty) {
if (STR_AS(tagName, "text")) loader->openedTag = OpenedTagType::Text;
auto defs = _createDefsNode(loader, nullptr, nullptr, 0, nullptr);
loader->stack.push(defs);
loader->currentGraphicsNode = node;
}
} else if ((gradientMethod = _findGradientFactory(tagName))) {
SvgStyleGradient* gradient;
gradient = gradientMethod(loader, attrs, attrsLength);
//Gradients do not allow nested declarations, so only the earliest declared Gradient is valid.
if (loader->gradientStack.count == 0) {
//FIXME: The current parsing structure does not distinguish end tags.
// There is no way to know if the currently parsed gradient is in defs.
// If a gradient is declared outside of defs after defs is set, it is included in the gradients of defs.
// But finally, the loader has a gradient style list regardless of defs.
// This is only to support this when multiple gradients are declared, even if no defs are declared.
// refer to: https://developer.mozilla.org/en-US/docs/Web/SVG/Element/defs
if (loader->def && loader->doc->node.doc.defs) {
loader->def->node.defs.gradients.push(gradient);
} else {
loader->gradients.push(gradient);
}
}
if (!empty) loader->gradientStack.push(gradient);
} else if (STR_AS(tagName, "stop")) {
if (loader->gradientStack.count == 0) {
TVGLOG("SVG", "Stop element is used outside of the Gradient element");
return;
}
/* default value for opacity */
loader->svgParse->gradStop = {0.0f, 0, 0, 0, 255};
loader->svgParse->flags = SvgStopStyleFlags::StopDefault;
xmlParseAttributes(attrs, attrsLength, _attrParseStops, loader);
loader->gradientStack.last()->stops.push(loader->svgParse->gradStop);
} else {
if (!isIgnoreUnsupportedLogElements(tagName)) TVGLOG("SVG", "Unsupported elements used [Elements: %s]", tagName);
}
}
static void _svgLoaderParserText(SvgLoaderData* loader, const char* content, unsigned int length)
{
auto& text = loader->svgParse->node->node.text;
text.text = append(text.text, content, length);
}
static char* _parseName(char* str, const char* delims, char** saveptr)
{
auto pch = strtok_r(str, delims, saveptr);
while (pch) {
while (*pch && isspace(*pch)) pch++;
if (*pch == '\0') {
pch = strtok_r(nullptr, delims, saveptr);
continue;
}
auto end = pch + strlen(pch) - 1;
while (end > pch && isspace(*end)) *end-- = '\0';
if (*pch == '\0') {
pch = strtok_r(nullptr, delims, saveptr);
continue;
}
break;
}
return pch;
}
static void _free(SvgStyleProperty* style)
{
if (!style) return;
//style->clipPath.node/mask.node/filter.node has only the addresses of node. Therefore, node is released from _freeNode.
tvg::free(style->clipPath.url);
tvg::free(style->mask.url);
tvg::free(style->filter.url);
tvg::free(style->cssClass);
if (style->fill.paint.gradient) {
style->fill.paint.gradient->clear();
tvg::free(style->fill.paint.gradient);
}
if (style->stroke.paint.gradient) {
style->stroke.paint.gradient->clear();
tvg::free(style->stroke.paint.gradient);
}
tvg::free(style->fill.paint.url);
tvg::free(style->stroke.paint.url);
style->stroke.dash.array.reset();
tvg::free(style);
}
static void _free(SvgNode* node)
{
if (!node) return;
ARRAY_FOREACH(p, node->child) _free(*p);
node->child.reset();
tvg::free(node->id);
tvg::free(node->transform);
_free(node->style);
switch (node->type) {
case SvgNodeType::Path: {
tvg::free(node->node.path.path);
break;
}
case SvgNodeType::Polygon: {
tvg::free(node->node.polygon.pts.data);
break;
}
case SvgNodeType::Polyline: {
tvg::free(node->node.polyline.pts.data);
break;
}
case SvgNodeType::Doc: {
_free(node->node.doc.defs);
_free(node->node.doc.style);
break;
}
case SvgNodeType::Defs: {
ARRAY_FOREACH(p, node->node.defs.gradients) {
(*p)->clear();
tvg::free(*p);
}
node->node.defs.gradients.reset();
break;
}
case SvgNodeType::Image: {
tvg::free(node->node.image.href);
break;
}
case SvgNodeType::Text: {
tvg::free(node->node.text.text);
tvg::free(node->node.text.fontFamily);
break;
}
default: {
break;
}
}
tvg::free(node);
}
static bool _cssApplyClass(SvgNode* node, const char* classString, SvgNode* styleRoot)
{
if (!classString || !styleRoot) return false;
auto classes = duplicate(classString);
bool allFound = true;
auto tempNode = tvg::calloc<SvgNode>(1, sizeof(SvgNode));
tempNode->style = tvg::calloc<SvgStyleProperty>(1, sizeof(SvgStyleProperty));
tempNode->type = node->type;
tempNode->style->opacity = 255;
tempNode->style->fill.opacity = 255;
tempNode->style->stroke.opacity = 255;
char* tokPtr = nullptr;
auto name = _parseName(classes, " ", &tokPtr);
tvg::Array<const char*> applyClasses;
while (name) {
auto isDuplicate = false;
ARRAY_FOREACH(p, applyClasses) {
if (STR_AS(*p, name)) {
isDuplicate = true;
break;
}
}
if (isDuplicate) {
name = _parseName(nullptr, " ", &tokPtr);
continue;
}
applyClasses.push(name);
auto found = false;
//css styling: tag.name has higher priority than .name
if (auto cssNode = cssFindStyleNode(styleRoot, name)) {
cssCopyStyleAttr(tempNode, cssNode, true);
found = true;
}
if (auto cssNode = cssFindStyleNode(styleRoot, name, node->type)) {
cssCopyStyleAttr(tempNode, cssNode, true);
found = true;
}
if (!found) allFound = false;
name = _parseName(nullptr, " ", &tokPtr);
}
tvg::free(classes);
//Apply the merged style to the node (without overwriting existing styles)
cssCopyStyleAttr(node, tempNode);
_free(tempNode);
return allFound;
}
static void _cssApplyStyleToPostponeds(Array<SvgNodeIdPair>& postponeds, SvgNode* style)
{
ARRAY_FOREACH(p, postponeds) {
auto nodeIdPair = *p;
_cssApplyClass(nodeIdPair.node, nodeIdPair.id, style);
}
}
static void _svgLoaderParserXmlCssStyle(SvgLoaderData* loader, const char* content, unsigned int length)
{
char* tag;
char* name;
const char* attrs = nullptr;
unsigned int attrsLength = 0;
FactoryMethod method;
GradientFactoryMethod gradientMethod;
SvgNode *node = nullptr;
while (auto next = xmlParseCSSAttribute(content, length, &tag, &name, &attrs, &attrsLength)) {
if ((method = _findGroupFactory(tag))) {
if ((node = method(loader, loader->cssStyle, attrs, attrsLength, xmlParseW3CAttribute))) _copyId(&node->id, name);
} else if ((method = _findGraphicsFactory(tag))) {
if ((node = method(loader, loader->cssStyle, attrs, attrsLength, xmlParseW3CAttribute))) _copyId(&node->id, name);
} else if ((gradientMethod = _findGradientFactory(tag))) {
TVGLOG("SVG", "Unsupported elements used in the internal CSS style sheets [Elements: %s]", tag);
} else if (STR_AS(tag, "stop")) {
TVGLOG("SVG", "Unsupported elements used in the internal CSS style sheets [Elements: %s]", tag);
} else if (STR_AS(tag, "all")) {
char* tokPtr = nullptr;
auto id = _parseName(name, ",", &tokPtr);
while (id) {
if (*id == '.') id++;
if (auto cssNode = cssFindStyleNode(loader->cssStyle, id)) {
auto oldNode = loader->svgParse->node;
loader->svgParse->node = cssNode;
xmlParseW3CAttribute(attrs, attrsLength, _attrParseCssStyleNode, loader);
loader->svgParse->node = oldNode;
} else {
if ((node = _createCssStyleNode(loader, loader->cssStyle, attrs, attrsLength, xmlParseW3CAttribute))) _copyId(&node->id, id);
}
id = _parseName(nullptr, ",", &tokPtr);
}
} else if (STR_AS(tag, "@font-face")) { //css at-rule specifying font
_createFontFace(loader, attrs, attrsLength, xmlParseW3CAttribute);
} else if (!isIgnoreUnsupportedLogElements(tag)) {
TVGLOG("SVG", "Unsupported elements used in the internal CSS style sheets [Elements: %s]", tag);
}
length -= next - content;
content = next;
tvg::free(tag);
tvg::free(name);
}
loader->openedTag = OpenedTagType::Other;
}
static bool _svgLoaderParser(void* data, XMLType type, const char* content, unsigned int length)
{
SvgLoaderData* loader = (SvgLoaderData*)data;
switch (type) {
case XMLType::Open: {
_svgLoaderParserXmlOpen(loader, content, length, false);
break;
}
case XMLType::OpenEmpty: {
_svgLoaderParserXmlOpen(loader, content, length, true);
break;
}
case XMLType::Close: {
_svgLoaderParserXmlClose(loader, content, length);
break;
}
case XMLType::Data:
case XMLType::CData: {
if (loader->openedTag == OpenedTagType::Style) _svgLoaderParserXmlCssStyle(loader, content, length);
else if (loader->openedTag == OpenedTagType::Text) _svgLoaderParserText(loader, content, length);
break;
}
case XMLType::DoctypeChild: {
break;
}
case XMLType::Ignored:
case XMLType::Comment:
case XMLType::Doctype: {
break;
}
default: {
break;
}
}
return true;
}
static void _updateStyle(SvgNode* node, SvgStyleProperty* parentStyle)
{
_styleInherit(node->style, parentStyle);
ARRAY_FOREACH(p, node->child) {
_updateStyle(*p, node->style);
}
}
static void _updateGradient(SvgLoaderData* loader, SvgNode* node, Array<SvgStyleGradient*>* gradients)
{
auto duplicate = [&](SvgLoaderData* loader, Array<SvgStyleGradient*>* gradients, const char* id) -> SvgStyleGradient* {
SvgStyleGradient* result = nullptr;
ARRAY_FOREACH(p, *gradients) {
if ((*p)->id && STR_AS((*p)->id, id)) {
result = _cloneGradient(*p);
break;
}
}
if (result && result->ref) {
ARRAY_FOREACH(p, *gradients) {
if ((*p)->id && STR_AS((*p)->id, result->ref)) {
_inheritGradient(loader, result, *p);
break;
}
}
}
return result;
};
if (node->child.count > 0) {
ARRAY_FOREACH(p, node->child) {
_updateGradient(loader, *p, gradients);
}
} else {
if (node->style->fill.paint.url) {
auto newGrad = duplicate(loader, gradients, node->style->fill.paint.url);
if (newGrad) {
if (node->style->fill.paint.gradient) {
node->style->fill.paint.gradient->clear();
tvg::free(node->style->fill.paint.gradient);
}
node->style->fill.paint.gradient = newGrad;
}
}
if (node->style->stroke.paint.url) {
auto newGrad = duplicate(loader, gradients, node->style->stroke.paint.url);
if (newGrad) {
if (node->style->stroke.paint.gradient) {
node->style->stroke.paint.gradient->clear();
tvg::free(node->style->stroke.paint.gradient);
}
node->style->stroke.paint.gradient = newGrad;
}
}
}
}
static void _updateComposite(SvgNode* node, SvgNode* root)
{
if (node->style->clipPath.url && !node->style->clipPath.node) {
SvgNode* findResult = _findNodeById(root, node->style->clipPath.url);
if (findResult) node->style->clipPath.node = findResult;
}
if (node->style->mask.url && !node->style->mask.node) {
SvgNode* findResult = _findNodeById(root, node->style->mask.url);
if (findResult) node->style->mask.node = findResult;
}
if (node->child.count > 0) {
ARRAY_FOREACH(p, node->child) {
_updateComposite(*p, root);
}
}
}
static void _updateFilter(SvgNode* node, SvgNode* root)
{
if (node->style->filter.url && !node->style->filter.node) {
node->style->filter.node = _findNodeById(root, node->style->filter.url);
}
ARRAY_FOREACH(child, node->child) {
_updateFilter(*child, root);
}
}
static bool _svgLoaderParserForValidCheckXmlOpen(SvgLoaderData* loader, const char* content, unsigned int length)
{
const char* attrs = nullptr;
int sz = length;
char tagName[20] = "";
FactoryMethod method;
SvgNode *node = nullptr;
int attrsLength = 0;
loader->level++;
attrs = xmlFindAttributesTag(content, length);
if (!attrs) {
//Parse the empty tag
attrs = content;
while ((attrs != nullptr) && *attrs != '>') attrs++;
}
if (attrs) {
sz = attrs - content;
while ((sz > 0) && (isspace((unsigned char)content[sz - 1]))) sz--;
if ((unsigned)sz >= sizeof(tagName)) return false;
strncpy(tagName, content, sz);
tagName[sz] = '\0';
attrsLength = length - sz;
}
if ((method = _findGroupFactory(tagName))) {
if (!loader->doc) {
if (!STR_AS(tagName, "svg")) return true; //Not a valid svg document
node = method(loader, nullptr, attrs, attrsLength, xmlParseAttributes);
loader->doc = node;
loader->stack.push(node);
return false;
}
}
return true;
}
static bool _svgLoaderParserForValidCheck(void* data, XMLType type, const char* content, unsigned int length)
{
switch (type) {
case XMLType::Open:
case XMLType::OpenEmpty: {
//If 'res' is false, it means <svg> tag is found.
return _svgLoaderParserForValidCheckXmlOpen(static_cast<SvgLoaderData*>(data), content, length);
}
default: return true;
}
}
void SvgLoader::clear(bool all)
{
//flush out the intermediate data
tvg::free(loaderData.svgParse);
loaderData.svgParse = nullptr;
ARRAY_FOREACH(p, loaderData.gradients) {
(*p)->clear();
tvg::free(*p);
}
loaderData.gradients.reset();
loaderData.gradientStack.reset();
_free(loaderData.doc);
loaderData.doc = nullptr;
loaderData.stack.reset();
if (!all) return;
ARRAY_FOREACH(p, loaderData.images) tvg::free(*p);
loaderData.images.reset();
ARRAY_FOREACH(p, loaderData.fonts) {
Text::unload(p->name);
tvg::free(p->decoded);
tvg::free(p->name);
}
loaderData.fonts.reset();
if (copy) tvg::free((char*)content);
if (root) {
root->unref();
root = nullptr;
}
size = 0;
content = nullptr;
copy = false;
}
void SvgLoader::run(unsigned tid)
{
//According to the SVG standard the value of the width/height of the viewbox set to 0 disables rendering
if ((viewFlag & SvgViewFlag::Viewbox) && (fabsf(vbox.w) <= FLOAT_EPSILON || fabsf(vbox.h) <= FLOAT_EPSILON)) {
TVGLOG("SVG", "The <viewBox> width and/or height set to 0 - rendering disabled.");
root = Scene::gen();
} else {
if (xmlParse(content, size, true, _svgLoaderParser, &(loaderData))) {
if (loaderData.doc) {
auto defs = loaderData.doc->node.doc.defs;
if (loaderData.nodesToStyle.count > 0) _cssApplyStyleToPostponeds(loaderData.nodesToStyle, loaderData.cssStyle);
if (loaderData.cssStyle) cssUpdateStyle(loaderData.doc, loaderData.cssStyle);
if (!loaderData.cloneNodes.empty()) _clonePostponedNodes(&loaderData.cloneNodes, loaderData.doc);
_updateComposite(loaderData.doc, loaderData.doc);
if (defs) _updateComposite(loaderData.doc, defs);
_updateFilter(loaderData.doc, loaderData.doc);
if (defs) _updateFilter(loaderData.doc, defs);
_updateStyle(loaderData.doc, nullptr);
if (defs) _updateStyle(defs, nullptr);
if (loaderData.gradients.count > 0) _updateGradient(&loaderData, loaderData.doc, &loaderData.gradients);
if (defs) _updateGradient(&loaderData, loaderData.doc, &defs->node.defs.gradients);
root = svgSceneBuild(loaderData, vbox, w, h, align, meetOrSlice, svgPath, viewFlag);
//In case no viewbox and width/height data is provided the completion of loading
//has to be forced, in order to establish this data based on the whole picture.
if (!(viewFlag & SvgViewFlag::Viewbox)) {
//Override viewbox & size again after svg loading.
vbox = loaderData.doc->node.doc.vbox;
w = loaderData.doc->node.doc.w;
h = loaderData.doc->node.doc.h;
}
}
}
}
root->ref();
clear(false);
}
/************************************************************************/
/* External Class Implementation */
/************************************************************************/
SvgLoader::SvgLoader() : ImageLoader(FileType::Svg)
{
}
SvgLoader::~SvgLoader()
{
done();
clear();
}
bool SvgLoader::header()
{
//For valid check, only <svg> tag is parsed first.
//If the <svg> tag is found, the loaded file is valid and stores viewbox information.
//After that, the remaining content data is parsed in order with async.
loaderData.svgParse = tvg::malloc<SvgParser>(sizeof(SvgParser));
loaderData.svgParse->flags = SvgStopStyleFlags::StopDefault;
viewFlag = SvgViewFlag::None;
xmlParse(content, size, true, _svgLoaderParserForValidCheck, &(loaderData));
if (!loaderData.doc || loaderData.doc->type != SvgNodeType::Doc) {
TVGLOG("SVG", "No SVG File. There is no <svg/>");
return false;
}
viewFlag = loaderData.doc->node.doc.viewFlag;
align = loaderData.doc->node.doc.align;
meetOrSlice = loaderData.doc->node.doc.meetOrSlice;
if (viewFlag & SvgViewFlag::Viewbox) {
vbox = loaderData.doc->node.doc.vbox;
if (viewFlag & SvgViewFlag::Width) w = loaderData.doc->node.doc.w;
else {
w = loaderData.doc->node.doc.vbox.w;
if (viewFlag & SvgViewFlag::WidthInPercent) {
w *= loaderData.doc->node.doc.w;
viewFlag = (viewFlag ^ SvgViewFlag::WidthInPercent);
}
viewFlag = (viewFlag | SvgViewFlag::Width);
}
if (viewFlag & SvgViewFlag::Height) h = loaderData.doc->node.doc.h;
else {
h = loaderData.doc->node.doc.vbox.h;
if (viewFlag & SvgViewFlag::HeightInPercent) {
h *= loaderData.doc->node.doc.h;
viewFlag = (viewFlag ^ SvgViewFlag::HeightInPercent);
}
viewFlag = (viewFlag | SvgViewFlag::Height);
}
//In case no viewbox and width/height data is provided the completion of loading
//has to be forced, in order to establish this data based on the whole picture.
} else {
//Before loading, set default viewbox & size if they are empty
vbox.x = vbox.y = 0.0f;
if (viewFlag & SvgViewFlag::Width) {
vbox.w = w = loaderData.doc->node.doc.w;
} else {
vbox.w = 1.0f;
if (viewFlag & SvgViewFlag::WidthInPercent) {
w = loaderData.doc->node.doc.w;
} else w = 1.0f;
}
if (viewFlag & SvgViewFlag::Height) {
vbox.h = h = loaderData.doc->node.doc.h;
} else {
vbox.h = 1.0f;
if (viewFlag & SvgViewFlag::HeightInPercent) {
h = loaderData.doc->node.doc.h;
} else h = 1.0f;
}
run(0);
}
return true;
}
bool SvgLoader::open(const char* data, uint32_t size, TVG_UNUSED const char* rpath, bool copy)
{
if (copy) {
content = tvg::malloc<char>(size + 1);
memcpy((char*)content, data, size);
content[size] = '\0';
} else content = (char*)data;
this->size = size;
this->copy = copy;
return header();
}
bool SvgLoader::open(const char* path)
{
#ifdef THORVG_FILE_IO_SUPPORT
if ((content = LoadModule::open(path, size, true))) {
copy = true;
return header();
}
#endif
return false;
}
bool SvgLoader::resize(Paint* paint, float w, float h)
{
if (!paint) return false;
auto sx = w / this->w;
auto sy = h / this->h;
Matrix m = {sx, 0, 0, 0, sy, 0, 0, 0, 1};
paint->transform(m);
return true;
}
bool SvgLoader::read()
{
if (!content || size == 0) return false;
if (!LoadModule::read() || root) return true;
TaskScheduler::request(this);
return true;
}
bool SvgLoader::close()
{
if (!LoadModule::close()) return false;
this->done();
clear();
return true;
}
Paint* SvgLoader::paint()
{
this->done();
if (root) {
//Primary usage: sharing the svg
if (root->refCnt() == 1) return root;
return root->duplicate();
}
return nullptr;
}