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https://github.com/godotengine/godot
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290 lines
11 KiB
C++
290 lines
11 KiB
C++
/**************************************************************************/
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/* image_compress_astcenc.cpp */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#include "image_compress_astcenc.h"
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#include "core/os/os.h"
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#include "core/string/print_string.h"
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#include <astcenc.h>
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void _compress_astc(Image *r_img, Image::ASTCFormat p_format) {
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uint64_t start_time = OS::get_singleton()->get_ticks_msec();
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// TODO: See how to handle lossy quality.
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Image::Format img_format = r_img->get_format();
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if (img_format >= Image::FORMAT_DXT1) {
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return; // Do not compress, already compressed.
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}
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bool is_hdr = false;
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if ((img_format >= Image::FORMAT_RH) && (img_format <= Image::FORMAT_RGBE9995)) {
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is_hdr = true;
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r_img->convert(Image::FORMAT_RGBAF);
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} else {
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r_img->convert(Image::FORMAT_RGBA8);
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}
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// Determine encoder output format from our enum.
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Image::Format target_format = Image::FORMAT_RGBA8;
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astcenc_profile profile = ASTCENC_PRF_LDR;
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unsigned int block_x = 4;
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unsigned int block_y = 4;
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if (p_format == Image::ASTCFormat::ASTC_FORMAT_4x4) {
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if (is_hdr) {
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target_format = Image::FORMAT_ASTC_4x4_HDR;
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profile = ASTCENC_PRF_HDR;
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} else {
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target_format = Image::FORMAT_ASTC_4x4;
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}
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} else if (p_format == Image::ASTCFormat::ASTC_FORMAT_8x8) {
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if (is_hdr) {
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target_format = Image::FORMAT_ASTC_8x8_HDR;
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profile = ASTCENC_PRF_HDR;
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} else {
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target_format = Image::FORMAT_ASTC_8x8;
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}
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block_x = 8;
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block_y = 8;
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}
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// Compress image data and (if required) mipmaps.
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const bool mipmaps = r_img->has_mipmaps();
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int width = r_img->get_width();
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int height = r_img->get_height();
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int required_width = (width % block_x) != 0 ? width + (block_x - (width % block_x)) : width;
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int required_height = (height % block_y) != 0 ? height + (block_y - (height % block_y)) : height;
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if (width != required_width || height != required_height) {
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// Resize texture to fit block size.
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r_img->resize(required_width, required_height);
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width = required_width;
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height = required_height;
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}
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print_verbose(vformat("astcenc: Encoding image size %dx%d to format %s%s.", width, height, Image::get_format_name(target_format), mipmaps ? ", with mipmaps" : ""));
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// Initialize astcenc.
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int dest_size = Image::get_image_data_size(width, height, target_format, mipmaps);
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Vector<uint8_t> dest_data;
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dest_data.resize(dest_size);
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uint8_t *dest_write = dest_data.ptrw();
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astcenc_config config;
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config.block_x = block_x;
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config.block_y = block_y;
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config.profile = profile;
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const float quality = ASTCENC_PRE_MEDIUM;
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astcenc_error status = astcenc_config_init(profile, block_x, block_y, 1, quality, 0, &config);
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ERR_FAIL_COND_MSG(status != ASTCENC_SUCCESS,
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vformat("astcenc: Configuration initialization failed: %s.", astcenc_get_error_string(status)));
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// Context allocation.
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astcenc_context *context;
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const unsigned int thread_count = 1; // Godot compresses multiple images each on a thread, which is more efficient for large amount of images imported.
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status = astcenc_context_alloc(&config, thread_count, &context);
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ERR_FAIL_COND_MSG(status != ASTCENC_SUCCESS,
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vformat("astcenc: Context allocation failed: %s.", astcenc_get_error_string(status)));
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Vector<uint8_t> image_data = r_img->get_data();
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int mip_count = mipmaps ? Image::get_image_required_mipmaps(width, height, target_format) : 0;
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for (int i = 0; i < mip_count + 1; i++) {
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int src_mip_w, src_mip_h;
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int src_ofs = Image::get_image_mipmap_offset_and_dimensions(width, height, r_img->get_format(), i, src_mip_w, src_mip_h);
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const uint8_t *slices = &image_data.ptr()[src_ofs];
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int dst_mip_w, dst_mip_h;
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int dst_ofs = Image::get_image_mipmap_offset_and_dimensions(width, height, target_format, i, dst_mip_w, dst_mip_h);
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// Ensure that mip offset is a multiple of 8 (etcpak expects uint64_t pointer).
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ERR_FAIL_COND(dst_ofs % 8 != 0);
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uint8_t *dest_mip_write = (uint8_t *)&dest_write[dst_ofs];
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// Compress image.
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astcenc_image image;
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image.dim_x = src_mip_w;
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image.dim_y = src_mip_h;
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image.dim_z = 1;
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image.data_type = ASTCENC_TYPE_U8;
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if (is_hdr) {
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image.data_type = ASTCENC_TYPE_F32;
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}
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image.data = (void **)(&slices);
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// Compute the number of ASTC blocks in each dimension.
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unsigned int block_count_x = (src_mip_w + block_x - 1) / block_x;
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unsigned int block_count_y = (src_mip_h + block_y - 1) / block_y;
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size_t comp_len = block_count_x * block_count_y * 16;
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const astcenc_swizzle swizzle = {
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ASTCENC_SWZ_R, ASTCENC_SWZ_G, ASTCENC_SWZ_B, ASTCENC_SWZ_A
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};
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status = astcenc_compress_image(context, &image, &swizzle, dest_mip_write, comp_len, 0);
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ERR_BREAK_MSG(status != ASTCENC_SUCCESS,
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vformat("astcenc: ASTC image compression failed: %s.", astcenc_get_error_string(status)));
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astcenc_compress_reset(context);
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}
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astcenc_context_free(context);
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// Replace original image with compressed one.
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r_img->set_data(width, height, mipmaps, target_format, dest_data);
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print_verbose(vformat("astcenc: Encoding took %d ms.", OS::get_singleton()->get_ticks_msec() - start_time));
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}
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void _decompress_astc(Image *r_img) {
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uint64_t start_time = OS::get_singleton()->get_ticks_msec();
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// Determine decompression parameters from image format.
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Image::Format img_format = r_img->get_format();
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bool is_hdr = false;
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unsigned int block_x = 0;
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unsigned int block_y = 0;
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if (img_format == Image::FORMAT_ASTC_4x4) {
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block_x = 4;
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block_y = 4;
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is_hdr = false;
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} else if (img_format == Image::FORMAT_ASTC_4x4_HDR) {
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block_x = 4;
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block_y = 4;
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is_hdr = true;
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} else if (img_format == Image::FORMAT_ASTC_8x8) {
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block_x = 8;
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block_y = 8;
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is_hdr = false;
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} else if (img_format == Image::FORMAT_ASTC_8x8_HDR) {
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block_x = 8;
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block_y = 8;
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is_hdr = true;
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} else {
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ERR_FAIL_MSG("astcenc: Cannot decompress Image with a non-ASTC format.");
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}
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// Initialize astcenc.
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astcenc_profile profile = ASTCENC_PRF_LDR;
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if (is_hdr) {
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profile = ASTCENC_PRF_HDR;
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}
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astcenc_config config;
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const float quality = ASTCENC_PRE_MEDIUM;
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astcenc_error status = astcenc_config_init(profile, block_x, block_y, 1, quality, 0, &config);
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ERR_FAIL_COND_MSG(status != ASTCENC_SUCCESS,
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vformat("astcenc: Configuration initialization failed: %s.", astcenc_get_error_string(status)));
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// Context allocation.
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astcenc_context *context = nullptr;
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const unsigned int thread_count = 1;
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status = astcenc_context_alloc(&config, thread_count, &context);
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ERR_FAIL_COND_MSG(status != ASTCENC_SUCCESS,
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vformat("astcenc: Context allocation failed: %s.", astcenc_get_error_string(status)));
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Image::Format target_format = is_hdr ? Image::FORMAT_RGBAF : Image::FORMAT_RGBA8;
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const bool mipmaps = r_img->has_mipmaps();
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int width = r_img->get_width();
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int height = r_img->get_height();
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int dest_size = Image::get_image_data_size(width, height, target_format, mipmaps);
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Vector<uint8_t> dest_data;
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dest_data.resize(dest_size);
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uint8_t *dest_write = dest_data.ptrw();
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// Decompress image.
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Vector<uint8_t> image_data = r_img->get_data();
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int mip_count = mipmaps ? Image::get_image_required_mipmaps(width, height, target_format) : 0;
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for (int i = 0; i < mip_count + 1; i++) {
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int src_mip_w, src_mip_h;
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int src_ofs = Image::get_image_mipmap_offset_and_dimensions(width, height, r_img->get_format(), i, src_mip_w, src_mip_h);
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const uint8_t *src_data = &image_data.ptr()[src_ofs];
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int src_size;
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if (i == mip_count) {
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src_size = image_data.size() - src_ofs;
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} else {
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int auxw, auxh;
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src_size = Image::get_image_mipmap_offset_and_dimensions(width, height, r_img->get_format(), i + 1, auxw, auxh) - src_ofs;
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}
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int dst_mip_w, dst_mip_h;
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int dst_ofs = Image::get_image_mipmap_offset_and_dimensions(width, height, target_format, i, dst_mip_w, dst_mip_h);
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// Ensure that mip offset is a multiple of 8 (etcpak expects uint64_t pointer).
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ERR_FAIL_COND(dst_ofs % 8 != 0);
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uint8_t *dest_mip_write = (uint8_t *)&dest_write[dst_ofs];
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astcenc_image image;
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image.dim_x = dst_mip_w;
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image.dim_y = dst_mip_h;
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image.dim_z = 1;
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image.data_type = ASTCENC_TYPE_U8;
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if (is_hdr) {
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target_format = Image::FORMAT_RGBAF;
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image.data_type = ASTCENC_TYPE_F32;
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}
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image.data = (void **)(&dest_mip_write);
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const astcenc_swizzle swizzle = {
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ASTCENC_SWZ_R, ASTCENC_SWZ_G, ASTCENC_SWZ_B, ASTCENC_SWZ_A
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};
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status = astcenc_decompress_image(context, src_data, src_size, &image, &swizzle, 0);
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ERR_BREAK_MSG(status != ASTCENC_SUCCESS,
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vformat("astcenc: ASTC decompression failed: %s.", astcenc_get_error_string(status)));
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ERR_BREAK_MSG(image.dim_z > 1,
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"astcenc: ASTC decompression failed because this is a 3D texture, which is not supported.");
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astcenc_compress_reset(context);
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}
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astcenc_context_free(context);
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// Replace original image with compressed one.
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r_img->set_data(width, height, mipmaps, target_format, dest_data);
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print_verbose(vformat("astcenc: Decompression took %d ms.", OS::get_singleton()->get_ticks_msec() - start_time));
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}
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