/*
* 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 "tvgMath.h"
#include "tvgSwCommon.h"
/************************************************************************/
/* Internal Class Implementation */
/************************************************************************/
static inline bool _onlyShifted(const Matrix& m)
{
if (tvg::equal(m.e11, 1.0f) && tvg::equal(m.e22, 1.0f) && tvg::zero(m.e12) && tvg::zero(m.e21)) return true;
return false;
}
static bool _genOutline(SwImage& image, const Matrix& transform, SwMpool* mpool, unsigned tid)
{
image.outline = mpool->outline(tid);
auto outline = image.outline;
outline->pts.reserve(5);
outline->types.reserve(5);
outline->cntrs.reserve(1);
outline->closed.reserve(1);
Point to[4];
auto w = static_cast<float>(image.w);
auto h = static_cast<float>(image.h);
to[0] = {0, 0};
to[1] = {w, 0};
to[2] = {w, h};
to[3] = {0, h};
for (int i = 0; i < 4; i++) {
outline->pts.push(mathTransform(&to[i], transform));
outline->types.push(SW_CURVE_TYPE_POINT);
}
outline->pts.push(outline->pts[0]);
outline->types.push(SW_CURVE_TYPE_POINT);
outline->cntrs.push(outline->pts.count - 1);
outline->closed.push(true);
image.outline = outline;
image.outline->fillRule = FillRule::NonZero;
return true;
}
/************************************************************************/
/* External Class Implementation */
/************************************************************************/
bool imagePrepare(SwImage& image, const Matrix& transform, const RenderRegion& clipBox, RenderRegion& renderBox, SwMpool* mpool, unsigned tid)
{
image.direct = _onlyShifted(transform);
//Fast track: Non-transformed image but just shifted.
if (image.direct) {
image.ox = -static_cast<int32_t>(nearbyint(transform.e13));
image.oy = -static_cast<int32_t>(nearbyint(transform.e23));
//Figure out the scale factor by transform matrix
} else {
auto scaleX = sqrtf((transform.e11 * transform.e11) + (transform.e21 * transform.e21));
auto scaleY = sqrtf((transform.e22 * transform.e22) + (transform.e12 * transform.e12));
image.scale = (fabsf(scaleX - scaleY) > 0.01f) ? 1.0f : scaleX;
if (tvg::zero(transform.e12) && tvg::zero(transform.e21)) image.scaled = true;
else image.scaled = false;
}
if (!_genOutline(image, transform, mpool, tid)) return false;
return mathUpdateOutlineBBox(image.outline, clipBox, renderBox, image.direct);
}
bool imageGenRle(SwImage& image, const RenderRegion& renderBox, SwMpool* mpool, unsigned tid, bool antiAlias)
{
if ((image.rle = rleRender(image.rle, image.outline, renderBox, mpool, tid, antiAlias))) return true;
return false;
}
void imageDelOutline(SwImage& image, SwMpool* mpool, uint32_t tid)
{
image.outline = nullptr;
}
void imageReset(SwImage& image)
{
rleReset(image.rle);
}
void imageFree(SwImage& image)
{
rleFree(image.rle);
image.rle = nullptr;
}