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252 lines
11 KiB
C++
252 lines
11 KiB
C++
/**************************************************************************/
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/* image_decompress_bcdec.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_decompress_bcdec.h"
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#include "core/os/os.h"
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#include "core/string/print_string.h"
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#define BCDEC_IMPLEMENTATION
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#include "thirdparty/misc/bcdec.h"
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inline void bcdec_bc6h_half_s(const void *compressedBlock, void *decompressedBlock, int destinationPitch) {
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bcdec_bc6h_half(compressedBlock, decompressedBlock, destinationPitch, true);
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}
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inline void bcdec_bc6h_half_u(const void *compressedBlock, void *decompressedBlock, int destinationPitch) {
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bcdec_bc6h_half(compressedBlock, decompressedBlock, destinationPitch, false);
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}
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static void decompress_image(BCdecFormat format, const void *src, void *dst, const uint64_t width, const uint64_t height) {
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const uint8_t *src_blocks = reinterpret_cast<const uint8_t *>(src);
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uint8_t *dec_blocks = reinterpret_cast<uint8_t *>(dst);
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#define DECOMPRESS_LOOP(func, block_size, color_bytesize, color_components) \
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for (uint64_t y = 0; y < height; y += 4) { \
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for (uint64_t x = 0; x < width; x += 4) { \
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func(&src_blocks[src_pos], &dec_blocks[dst_pos], width *color_components); \
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src_pos += block_size; \
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dst_pos += 4 * color_bytesize; \
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} \
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dst_pos += 3 * width * color_bytesize; \
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}
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#define DECOMPRESS_LOOP_SAFE(func, block_size, color_bytesize, color_components, output) \
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for (uint64_t y = 0; y < height; y += 4) { \
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for (uint64_t x = 0; x < width; x += 4) { \
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const uint32_t yblock = MIN(height - y, 4ul); \
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const uint32_t xblock = MIN(width - x, 4ul); \
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\
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const bool incomplete = yblock < 4 && xblock < 4; \
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uint8_t *dec_out = incomplete ? output : &dec_blocks[y * 4 * width + x * color_bytesize]; \
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\
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func(&src_blocks[src_pos], dec_out, 4 * color_components); \
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src_pos += block_size; \
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\
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if (incomplete) { \
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for (uint32_t cy = 0; cy < yblock; cy++) { \
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for (uint32_t cx = 0; cx < xblock; cx++) { \
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memcpy(&dec_blocks[(y + cy) * 4 * width + (x + cx) * color_bytesize], &output[cy * 4 + cx * color_bytesize], color_bytesize); \
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} \
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} \
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} \
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} \
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}
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if (width % 4 != 0 || height % 4 != 0) {
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uint64_t src_pos = 0;
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uint8_t r8_output[4 * 4];
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uint8_t rg8_output[4 * 4 * 2];
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uint8_t rgba8_output[4 * 4 * 4];
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uint8_t rgbh_output[4 * 4 * 6];
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switch (format) {
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case BCdec_BC1: {
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DECOMPRESS_LOOP_SAFE(bcdec_bc1, BCDEC_BC1_BLOCK_SIZE, 4, 4, rgba8_output)
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} break;
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case BCdec_BC2: {
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DECOMPRESS_LOOP_SAFE(bcdec_bc2, BCDEC_BC2_BLOCK_SIZE, 4, 4, rgba8_output)
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} break;
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case BCdec_BC3: {
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DECOMPRESS_LOOP_SAFE(bcdec_bc3, BCDEC_BC3_BLOCK_SIZE, 4, 4, rgba8_output)
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} break;
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case BCdec_BC4: {
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DECOMPRESS_LOOP_SAFE(bcdec_bc4, BCDEC_BC4_BLOCK_SIZE, 1, 1, r8_output)
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} break;
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case BCdec_BC5: {
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DECOMPRESS_LOOP_SAFE(bcdec_bc5, BCDEC_BC5_BLOCK_SIZE, 2, 2, rg8_output)
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} break;
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case BCdec_BC6U: {
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DECOMPRESS_LOOP_SAFE(bcdec_bc6h_half_u, BCDEC_BC6H_BLOCK_SIZE, 6, 3, rgbh_output)
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} break;
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case BCdec_BC6S: {
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DECOMPRESS_LOOP_SAFE(bcdec_bc6h_half_s, BCDEC_BC6H_BLOCK_SIZE, 6, 3, rgbh_output)
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} break;
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case BCdec_BC7: {
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DECOMPRESS_LOOP_SAFE(bcdec_bc7, BCDEC_BC7_BLOCK_SIZE, 4, 4, rgba8_output)
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} break;
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}
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} else {
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uint64_t src_pos = 0, dst_pos = 0;
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switch (format) {
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case BCdec_BC1: {
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DECOMPRESS_LOOP(bcdec_bc1, BCDEC_BC1_BLOCK_SIZE, 4, 4)
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} break;
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case BCdec_BC2: {
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DECOMPRESS_LOOP(bcdec_bc2, BCDEC_BC2_BLOCK_SIZE, 4, 4)
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} break;
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case BCdec_BC3: {
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DECOMPRESS_LOOP(bcdec_bc3, BCDEC_BC3_BLOCK_SIZE, 4, 4)
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} break;
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case BCdec_BC4: {
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DECOMPRESS_LOOP(bcdec_bc4, BCDEC_BC4_BLOCK_SIZE, 1, 1)
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} break;
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case BCdec_BC5: {
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DECOMPRESS_LOOP(bcdec_bc5, BCDEC_BC5_BLOCK_SIZE, 2, 2)
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} break;
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case BCdec_BC6U: {
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DECOMPRESS_LOOP(bcdec_bc6h_half_u, BCDEC_BC6H_BLOCK_SIZE, 6, 3)
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} break;
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case BCdec_BC6S: {
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DECOMPRESS_LOOP(bcdec_bc6h_half_s, BCDEC_BC6H_BLOCK_SIZE, 6, 3)
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} break;
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case BCdec_BC7: {
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DECOMPRESS_LOOP(bcdec_bc7, BCDEC_BC7_BLOCK_SIZE, 4, 4)
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} break;
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}
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}
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#undef DECOMPRESS_LOOP
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#undef DECOMPRESS_LOOP_SAFE
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}
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void image_decompress_bcdec(Image *p_image) {
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uint64_t start_time = OS::get_singleton()->get_ticks_msec();
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int width = p_image->get_width();
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int height = p_image->get_height();
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// Compressed images' dimensions should be padded to the upper multiple of 4.
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// If they aren't, they need to be realigned (the actual data is correctly padded though).
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if (width % 4 != 0 || height % 4 != 0) {
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int new_width = width + (4 - (width % 4));
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int new_height = height + (4 - (height % 4));
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print_verbose(vformat("Compressed image's dimensions are not multiples of 4 (%dx%d), aligning to (%dx%d)", width, height, new_width, new_height));
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width = new_width;
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height = new_height;
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}
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Image::Format source_format = p_image->get_format();
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Image::Format target_format = Image::FORMAT_MAX;
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BCdecFormat bcdec_format = BCdec_BC1;
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switch (source_format) {
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case Image::FORMAT_DXT1:
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bcdec_format = BCdec_BC1;
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target_format = Image::FORMAT_RGBA8;
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break;
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case Image::FORMAT_DXT3:
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bcdec_format = BCdec_BC2;
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target_format = Image::FORMAT_RGBA8;
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break;
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case Image::FORMAT_DXT5:
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case Image::FORMAT_DXT5_RA_AS_RG:
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bcdec_format = BCdec_BC3;
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target_format = Image::FORMAT_RGBA8;
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break;
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case Image::FORMAT_RGTC_R:
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bcdec_format = BCdec_BC4;
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target_format = Image::FORMAT_R8;
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break;
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case Image::FORMAT_RGTC_RG:
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bcdec_format = BCdec_BC5;
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target_format = Image::FORMAT_RG8;
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break;
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case Image::FORMAT_BPTC_RGBFU:
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bcdec_format = BCdec_BC6U;
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target_format = Image::FORMAT_RGBH;
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break;
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case Image::FORMAT_BPTC_RGBF:
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bcdec_format = BCdec_BC6S;
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target_format = Image::FORMAT_RGBH;
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break;
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case Image::FORMAT_BPTC_RGBA:
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bcdec_format = BCdec_BC7;
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target_format = Image::FORMAT_RGBA8;
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break;
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default:
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ERR_FAIL_MSG("bcdec: Can't decompress unknown format: " + Image::get_format_name(source_format) + ".");
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break;
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}
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int mm_count = p_image->get_mipmap_count();
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int64_t target_size = Image::get_image_data_size(width, height, target_format, p_image->has_mipmaps());
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// Decompressed data.
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Vector<uint8_t> data;
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data.resize(target_size);
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uint8_t *wb = data.ptrw();
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// Source data.
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const uint8_t *rb = p_image->get_data().ptr();
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// Decompress mipmaps.
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for (int i = 0; i <= mm_count; i++) {
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int mipmap_w = 0, mipmap_h = 0;
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int64_t src_ofs = Image::get_image_mipmap_offset_and_dimensions(width, height, source_format, i, mipmap_w, mipmap_h);
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int64_t dst_ofs = Image::get_image_mipmap_offset(width, height, target_format, i);
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decompress_image(bcdec_format, rb + src_ofs, wb + dst_ofs, mipmap_w, mipmap_h);
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}
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p_image->set_data(width, height, p_image->has_mipmaps(), target_format, data);
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// Swap channels if the format is using a channel swizzle.
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if (source_format == Image::FORMAT_DXT5_RA_AS_RG) {
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p_image->convert_ra_rgba8_to_rg();
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}
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print_verbose(vformat("bcdec: Decompression of a %dx%d %s image with %d mipmaps took %d ms.",
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p_image->get_width(), p_image->get_height(), Image::get_format_name(source_format), p_image->get_mipmap_count(), OS::get_singleton()->get_ticks_msec() - start_time));
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}
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