/**************************************************************************/
/* image_compress_astcenc.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* 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 "image_compress_astcenc.h"
#include "core/os/os.h"
#include "core/string/print_string.h"
#include <astcenc.h>
#ifdef TOOLS_ENABLED
void _compress_astc(Image *r_img, Image::ASTCFormat p_format) {
const uint64_t start_time = OS::get_singleton()->get_ticks_msec();
if (r_img->is_compressed()) {
return; // Do not compress, already compressed.
}
const Image::Format src_format = r_img->get_format();
const bool is_hdr = src_format >= Image::FORMAT_RF && src_format <= Image::FORMAT_RGBE9995;
if (src_format >= Image::FORMAT_RH && src_format <= Image::FORMAT_RGBAH) {
r_img->convert(Image::FORMAT_RGBAH);
} else if (src_format >= Image::FORMAT_RF && src_format <= Image::FORMAT_RGBE9995) {
r_img->convert(Image::FORMAT_RGBAF);
} else {
r_img->convert(Image::FORMAT_RGBA8);
}
// Determine encoder output format from our enum.
const astcenc_profile profile = is_hdr ? ASTCENC_PRF_HDR : ASTCENC_PRF_LDR;
Image::Format target_format = Image::FORMAT_MAX;
unsigned int block_x = 4;
unsigned int block_y = 4;
if (p_format == Image::ASTCFormat::ASTC_FORMAT_4x4) {
if (is_hdr) {
target_format = Image::FORMAT_ASTC_4x4_HDR;
} else {
target_format = Image::FORMAT_ASTC_4x4;
}
} else if (p_format == Image::ASTCFormat::ASTC_FORMAT_8x8) {
if (is_hdr) {
target_format = Image::FORMAT_ASTC_8x8_HDR;
} else {
target_format = Image::FORMAT_ASTC_8x8;
}
block_x = 8;
block_y = 8;
}
// Compress image data and (if required) mipmaps.
const bool has_mipmaps = r_img->has_mipmaps();
int width = r_img->get_width();
int height = r_img->get_height();
int required_width = (width % block_x) != 0 ? width + (block_x - (width % block_x)) : width;
int required_height = (height % block_y) != 0 ? height + (block_y - (height % block_y)) : height;
if (width != required_width || height != required_height) {
// Resize texture to fit block size.
r_img->resize(required_width, required_height);
width = required_width;
height = required_height;
}
print_verbose(vformat("astcenc: Encoding image size %dx%d to format %s%s.", width, height, Image::get_format_name(target_format), has_mipmaps ? ", with mipmaps" : ""));
// Initialize astcenc.
const int64_t dest_size = Image::get_image_data_size(width, height, target_format, has_mipmaps);
Vector<uint8_t> dest_data;
dest_data.resize(dest_size);
uint8_t *dest_write = dest_data.ptrw();
astcenc_config config;
config.block_x = block_x;
config.block_y = block_y;
config.profile = profile;
const float quality = ASTCENC_PRE_MEDIUM;
astcenc_error status = astcenc_config_init(profile, block_x, block_y, 1, quality, 0, &config);
ERR_FAIL_COND_MSG(status != ASTCENC_SUCCESS,
vformat("astcenc: Configuration initialization failed: %s.", astcenc_get_error_string(status)));
// Context allocation.
astcenc_context *context;
const unsigned int thread_count = 1; // Godot compresses multiple images each on a thread, which is more efficient for large amount of images imported.
status = astcenc_context_alloc(&config, thread_count, &context);
ERR_FAIL_COND_MSG(status != ASTCENC_SUCCESS,
vformat("astcenc: Context allocation failed: %s.", astcenc_get_error_string(status)));
const int mip_count = has_mipmaps ? Image::get_image_required_mipmaps(width, height, target_format) : 0;
const uint8_t *src_data = r_img->ptr();
for (int i = 0; i < mip_count + 1; i++) {
int src_mip_w, src_mip_h;
const int64_t src_ofs = Image::get_image_mipmap_offset_and_dimensions(width, height, r_img->get_format(), i, src_mip_w, src_mip_h);
const uint8_t *mip_data = &src_data[src_ofs];
const int64_t dst_ofs = Image::get_image_mipmap_offset(width, height, target_format, i);
uint8_t *dest_mip_write = &dest_write[dst_ofs];
// Ensure that mip offset is a multiple of 8 (etcpak expects uint64_t pointer).
if (unlikely(dst_ofs % 8 != 0)) {
astcenc_context_free(context);
ERR_FAIL_MSG("astcenc: Mip offset is not a multiple of 8.");
}
// Compress image.
astcenc_image image;
image.dim_x = src_mip_w;
image.dim_y = src_mip_h;
image.dim_z = 1;
if (r_img->get_format() == Image::FORMAT_RGBA8) {
image.data_type = ASTCENC_TYPE_U8;
} else if (r_img->get_format() == Image::FORMAT_RGBAH) {
image.data_type = ASTCENC_TYPE_F16;
} else {
image.data_type = ASTCENC_TYPE_F32;
}
image.data = (void **)(&mip_data);
// Compute the number of ASTC blocks in each dimension.
unsigned int block_count_x = (src_mip_w + block_x - 1) / block_x;
unsigned int block_count_y = (src_mip_h + block_y - 1) / block_y;
size_t comp_len = block_count_x * block_count_y * 16;
const astcenc_swizzle swizzle = {
ASTCENC_SWZ_R, ASTCENC_SWZ_G, ASTCENC_SWZ_B, ASTCENC_SWZ_A
};
status = astcenc_compress_image(context, &image, &swizzle, dest_mip_write, comp_len, 0);
ERR_BREAK_MSG(status != ASTCENC_SUCCESS,
vformat("astcenc: ASTC image compression failed: %s.", astcenc_get_error_string(status)));
astcenc_compress_reset(context);
}
astcenc_context_free(context);
// Replace original image with compressed one.
r_img->set_data(width, height, has_mipmaps, target_format, dest_data);
print_verbose(vformat("astcenc: Encoding took %d ms.", OS::get_singleton()->get_ticks_msec() - start_time));
}
#endif // TOOLS_ENABLED
void _decompress_astc(Image *r_img) {
const uint64_t start_time = OS::get_singleton()->get_ticks_msec();
// Determine decompression parameters from image format.
const Image::Format src_format = r_img->get_format();
bool is_hdr = false;
unsigned int block_x = 0;
unsigned int block_y = 0;
switch (src_format) {
case Image::FORMAT_ASTC_4x4: {
block_x = 4;
block_y = 4;
is_hdr = false;
} break;
case Image::FORMAT_ASTC_4x4_HDR: {
block_x = 4;
block_y = 4;
is_hdr = true;
} break;
case Image::FORMAT_ASTC_8x8: {
block_x = 8;
block_y = 8;
is_hdr = false;
} break;
case Image::FORMAT_ASTC_8x8_HDR: {
block_x = 8;
block_y = 8;
is_hdr = true;
} break;
default: {
ERR_FAIL_MSG(vformat("astcenc: Cannot decompress Image with a non-ASTC format: %s.", Image::get_format_name(src_format)));
} break;
}
// Initialize astcenc.
const astcenc_profile profile = is_hdr ? ASTCENC_PRF_HDR : ASTCENC_PRF_LDR;
astcenc_config config;
const float quality = ASTCENC_PRE_MEDIUM;
const uint32_t flags = ASTCENC_FLG_DECOMPRESS_ONLY;
astcenc_error status = astcenc_config_init(profile, block_x, block_y, 1, quality, flags, &config);
ERR_FAIL_COND_MSG(status != ASTCENC_SUCCESS,
vformat("astcenc: Configuration initialization failed: %s.", astcenc_get_error_string(status)));
// Context allocation.
astcenc_context *context = nullptr;
const unsigned int thread_count = 1;
status = astcenc_context_alloc(&config, thread_count, &context);
ERR_FAIL_COND_MSG(status != ASTCENC_SUCCESS,
vformat("astcenc: Context allocation failed: %s.", astcenc_get_error_string(status)));
const Image::Format target_format = is_hdr ? Image::FORMAT_RGBAH : Image::FORMAT_RGBA8;
const bool has_mipmaps = r_img->has_mipmaps();
int width = r_img->get_width();
int height = r_img->get_height();
const int64_t dest_size = Image::get_image_data_size(width, height, target_format, has_mipmaps);
Vector<uint8_t> dest_data;
dest_data.resize(dest_size);
uint8_t *dest_write = dest_data.ptrw();
// Decompress image.
const int mip_count = has_mipmaps ? Image::get_image_required_mipmaps(width, height, target_format) : 0;
const uint8_t *src_data = r_img->ptr();
for (int i = 0; i < mip_count + 1; i++) {
const int64_t src_ofs = Image::get_image_mipmap_offset(width, height, src_format, i);
const uint8_t *mip_data = &src_data[src_ofs];
int64_t src_size;
if (i == mip_count) {
src_size = r_img->get_data_size() - src_ofs;
} else {
src_size = Image::get_image_mipmap_offset(width, height, src_format, i + 1) - src_ofs;
}
int dst_mip_w, dst_mip_h;
const int64_t dst_ofs = Image::get_image_mipmap_offset_and_dimensions(width, height, target_format, i, dst_mip_w, dst_mip_h);
// Ensure that mip offset is a multiple of 8 (etcpak expects uint64_t pointer).
ERR_FAIL_COND(dst_ofs % 8 != 0);
uint8_t *dest_mip_write = &dest_write[dst_ofs];
astcenc_image image;
image.dim_x = dst_mip_w;
image.dim_y = dst_mip_h;
image.dim_z = 1;
image.data_type = is_hdr ? ASTCENC_TYPE_F16 : ASTCENC_TYPE_U8;
image.data = (void **)(&dest_mip_write);
const astcenc_swizzle swizzle = {
ASTCENC_SWZ_R, ASTCENC_SWZ_G, ASTCENC_SWZ_B, ASTCENC_SWZ_A
};
status = astcenc_decompress_image(context, mip_data, src_size, &image, &swizzle, 0);
ERR_BREAK_MSG(status != ASTCENC_SUCCESS, vformat("astcenc: ASTC decompression failed: %s.", astcenc_get_error_string(status)));
ERR_BREAK_MSG(image.dim_z > 1, "astcenc: ASTC decompression failed because this is a 3D texture, which is not supported.");
astcenc_compress_reset(context);
}
astcenc_context_free(context);
// Replace original image with compressed one.
r_img->set_data(width, height, has_mipmaps, target_format, dest_data);
print_verbose(vformat("astcenc: Decompression took %d ms.", OS::get_singleton()->get_ticks_msec() - start_time));
}