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326 lines
12 KiB
C++
326 lines
12 KiB
C++
/**************************************************************************/
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/* image_compress_basisu.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_basisu.h"
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#include "servers/rendering_server.h"
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#include <transcoder/basisu_transcoder.h>
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#ifdef TOOLS_ENABLED
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#include <encoder/basisu_comp.h>
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#endif
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void basis_universal_init() {
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#ifdef TOOLS_ENABLED
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basisu::basisu_encoder_init();
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#endif
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basist::basisu_transcoder_init();
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}
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#ifdef TOOLS_ENABLED
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Vector<uint8_t> basis_universal_packer(const Ref<Image> &p_image, Image::UsedChannels p_channels) {
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Ref<Image> image = p_image->duplicate();
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image->convert(Image::FORMAT_RGBA8);
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basisu::basis_compressor_params params;
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params.m_uastc = true;
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params.m_quality_level = basisu::BASISU_QUALITY_MIN;
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params.m_pack_uastc_flags &= ~basisu::cPackUASTCLevelMask;
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params.m_pack_uastc_flags |= basisu::cPackUASTCLevelFastest;
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params.m_rdo_uastc = 0.0f;
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params.m_rdo_uastc_quality_scalar = 0.0f;
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params.m_rdo_uastc_dict_size = 1024;
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params.m_mip_fast = true;
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params.m_multithreading = true;
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params.m_check_for_alpha = false;
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basisu::job_pool job_pool(OS::get_singleton()->get_processor_count());
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params.m_pJob_pool = &job_pool;
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BasisDecompressFormat decompress_format = BASIS_DECOMPRESS_RG;
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switch (p_channels) {
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case Image::USED_CHANNELS_L: {
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decompress_format = BASIS_DECOMPRESS_RGB;
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} break;
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case Image::USED_CHANNELS_LA: {
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params.m_force_alpha = true;
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decompress_format = BASIS_DECOMPRESS_RGBA;
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} break;
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case Image::USED_CHANNELS_R: {
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decompress_format = BASIS_DECOMPRESS_RGB;
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} break;
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case Image::USED_CHANNELS_RG: {
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// Currently RG textures are compressed as DXT5/ETC2_RGBA8 with a RA -> RG swizzle,
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// as BasisUniversal didn't use to support ETC2_RG11 transcoding.
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params.m_force_alpha = true;
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image->convert_rg_to_ra_rgba8();
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decompress_format = BASIS_DECOMPRESS_RG_AS_RA;
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} break;
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case Image::USED_CHANNELS_RGB: {
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decompress_format = BASIS_DECOMPRESS_RGB;
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} break;
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case Image::USED_CHANNELS_RGBA: {
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params.m_force_alpha = true;
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decompress_format = BASIS_DECOMPRESS_RGBA;
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} break;
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}
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// Copy the source image data with mipmaps into BasisU.
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{
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const int orig_width = image->get_width();
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const int orig_height = image->get_height();
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bool is_res_div_4 = (orig_width % 4 == 0) && (orig_height % 4 == 0);
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// Image's resolution rounded up to the nearest values divisible by 4.
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int next_width = orig_width <= 2 ? orig_width : (orig_width + 3) & ~3;
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int next_height = orig_height <= 2 ? orig_height : (orig_height + 3) & ~3;
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Vector<uint8_t> image_data = image->get_data();
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basisu::vector<basisu::image> basisu_mipmaps;
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// Buffer for storing padded mipmap data.
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Vector<uint32_t> mip_data_padded;
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for (int32_t i = 0; i <= image->get_mipmap_count(); i++) {
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int ofs, size, width, height;
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image->get_mipmap_offset_size_and_dimensions(i, ofs, size, width, height);
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const uint8_t *image_mip_data = image_data.ptr() + ofs;
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// Pad the mipmap's data if its resolution isn't divisible by 4.
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if (image->has_mipmaps() && !is_res_div_4 && (width > 2 && height > 2) && (width != next_width || height != next_height)) {
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// Source mip's data interpreted as 32-bit RGBA blocks to help with copying pixel data.
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const uint32_t *mip_src_data = reinterpret_cast<const uint32_t *>(image_mip_data);
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// Reserve space in the padded buffer.
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mip_data_padded.resize(next_width * next_height);
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uint32_t *data_padded_ptr = mip_data_padded.ptrw();
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// Pad mipmap to the nearest block by smearing.
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int x = 0, y = 0;
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for (y = 0; y < height; y++) {
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for (x = 0; x < width; x++) {
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data_padded_ptr[next_width * y + x] = mip_src_data[width * y + x];
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}
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// First, smear in x.
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for (; x < next_width; x++) {
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data_padded_ptr[next_width * y + x] = data_padded_ptr[next_width * y + x - 1];
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}
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}
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// Then, smear in y.
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for (; y < next_height; y++) {
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for (x = 0; x < next_width; x++) {
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data_padded_ptr[next_width * y + x] = data_padded_ptr[next_width * y + x - next_width];
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}
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}
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// Override the image_mip_data pointer with our temporary Vector.
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image_mip_data = reinterpret_cast<const uint8_t *>(mip_data_padded.ptr());
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// Override the mipmap's properties.
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width = next_width;
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height = next_height;
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size = mip_data_padded.size() * 4;
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}
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// Get the next mipmap's resolution.
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next_width /= 2;
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next_height /= 2;
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// Copy the source mipmap's data to a BasisU image.
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basisu::image basisu_image(width, height);
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memcpy(basisu_image.get_ptr(), image_mip_data, size);
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if (i == 0) {
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params.m_source_images.push_back(basisu_image);
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} else {
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basisu_mipmaps.push_back(basisu_image);
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}
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}
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params.m_source_mipmap_images.push_back(basisu_mipmaps);
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}
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// Encode the image data.
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Vector<uint8_t> basisu_data;
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basisu::basis_compressor compressor;
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compressor.init(params);
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int basisu_err = compressor.process();
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ERR_FAIL_COND_V(basisu_err != basisu::basis_compressor::cECSuccess, basisu_data);
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const basisu::uint8_vec &basisu_out = compressor.get_output_basis_file();
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basisu_data.resize(basisu_out.size() + 4);
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// Copy the encoded data to the buffer.
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{
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uint8_t *wb = basisu_data.ptrw();
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*(uint32_t *)wb = decompress_format;
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memcpy(wb + 4, basisu_out.get_ptr(), basisu_out.size());
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}
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return basisu_data;
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}
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#endif // TOOLS_ENABLED
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Ref<Image> basis_universal_unpacker_ptr(const uint8_t *p_data, int p_size) {
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Ref<Image> image;
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ERR_FAIL_NULL_V_MSG(p_data, image, "Cannot unpack invalid BasisUniversal data.");
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const uint8_t *src_ptr = p_data;
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int src_size = p_size;
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basist::transcoder_texture_format basisu_format = basist::transcoder_texture_format::cTFTotalTextureFormats;
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Image::Format image_format = Image::FORMAT_MAX;
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// Get supported compression formats.
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bool bptc_supported = RS::get_singleton()->has_os_feature("bptc");
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bool astc_supported = RS::get_singleton()->has_os_feature("astc");
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bool s3tc_supported = RS::get_singleton()->has_os_feature("s3tc");
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bool etc2_supported = RS::get_singleton()->has_os_feature("etc2");
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bool needs_ra_rg_swap = false;
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switch (*(uint32_t *)(src_ptr)) {
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case BASIS_DECOMPRESS_RG: {
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// RGTC transcoding is currently performed with RG_AS_RA, fail.
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ERR_FAIL_V(image);
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} break;
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case BASIS_DECOMPRESS_RGB: {
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if (bptc_supported) {
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basisu_format = basist::transcoder_texture_format::cTFBC7_M6_OPAQUE_ONLY;
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image_format = Image::FORMAT_BPTC_RGBA;
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} else if (astc_supported) {
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basisu_format = basist::transcoder_texture_format::cTFASTC_4x4_RGBA;
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image_format = Image::FORMAT_ASTC_4x4;
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} else if (s3tc_supported) {
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basisu_format = basist::transcoder_texture_format::cTFBC1;
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image_format = Image::FORMAT_DXT1;
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} else if (etc2_supported) {
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basisu_format = basist::transcoder_texture_format::cTFETC1;
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image_format = Image::FORMAT_ETC2_RGB8;
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} else {
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// No supported VRAM compression formats, decompress.
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basisu_format = basist::transcoder_texture_format::cTFRGBA32;
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image_format = Image::FORMAT_RGBA8;
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}
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} break;
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case BASIS_DECOMPRESS_RGBA: {
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if (bptc_supported) {
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basisu_format = basist::transcoder_texture_format::cTFBC7_M5;
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image_format = Image::FORMAT_BPTC_RGBA;
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} else if (astc_supported) {
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basisu_format = basist::transcoder_texture_format::cTFASTC_4x4_RGBA;
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image_format = Image::FORMAT_ASTC_4x4;
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} else if (s3tc_supported) {
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basisu_format = basist::transcoder_texture_format::cTFBC3;
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image_format = Image::FORMAT_DXT5;
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} else if (etc2_supported) {
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basisu_format = basist::transcoder_texture_format::cTFETC2;
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image_format = Image::FORMAT_ETC2_RGBA8;
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} else {
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// No supported VRAM compression formats, decompress.
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basisu_format = basist::transcoder_texture_format::cTFRGBA32;
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image_format = Image::FORMAT_RGBA8;
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}
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} break;
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case BASIS_DECOMPRESS_RG_AS_RA: {
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if (s3tc_supported) {
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basisu_format = basist::transcoder_texture_format::cTFBC3;
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image_format = Image::FORMAT_DXT5_RA_AS_RG;
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} else if (etc2_supported) {
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basisu_format = basist::transcoder_texture_format::cTFETC2;
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image_format = Image::FORMAT_ETC2_RA_AS_RG;
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} else {
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// No supported VRAM compression formats, decompress.
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basisu_format = basist::transcoder_texture_format::cTFRGBA32;
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image_format = Image::FORMAT_RGBA8;
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needs_ra_rg_swap = true;
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}
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} break;
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}
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src_ptr += 4;
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src_size -= 4;
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basist::basisu_transcoder transcoder;
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ERR_FAIL_COND_V(!transcoder.validate_header(src_ptr, src_size), image);
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transcoder.start_transcoding(src_ptr, src_size);
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basist::basisu_image_info basisu_info;
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transcoder.get_image_info(src_ptr, src_size, basisu_info, 0);
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// Create the buffer for transcoded/decompressed data.
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Vector<uint8_t> out_data;
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out_data.resize(Image::get_image_data_size(basisu_info.m_width, basisu_info.m_height, image_format, basisu_info.m_total_levels > 1));
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uint8_t *dst = out_data.ptrw();
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memset(dst, 0, out_data.size());
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for (uint32_t i = 0; i < basisu_info.m_total_levels; i++) {
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basist::basisu_image_level_info basisu_level;
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transcoder.get_image_level_info(src_ptr, src_size, basisu_level, 0, i);
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uint32_t mip_block_or_pixel_count = Image::is_format_compressed(image_format) ? basisu_level.m_total_blocks : basisu_level.m_orig_width * basisu_level.m_orig_height;
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int ofs = Image::get_image_mipmap_offset(basisu_info.m_width, basisu_info.m_height, image_format, i);
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bool result = transcoder.transcode_image_level(src_ptr, src_size, 0, i, dst + ofs, mip_block_or_pixel_count, basisu_format);
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if (!result) {
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print_line(vformat("BasisUniversal cannot unpack level %d.", i));
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break;
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}
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}
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image = Image::create_from_data(basisu_info.m_width, basisu_info.m_height, basisu_info.m_total_levels > 1, image_format, out_data);
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if (needs_ra_rg_swap) {
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// Swap uncompressed RA-as-RG texture's color channels.
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image->convert_ra_rgba8_to_rg();
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}
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return image;
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}
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Ref<Image> basis_universal_unpacker(const Vector<uint8_t> &p_buffer) {
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return basis_universal_unpacker_ptr(p_buffer.ptr(), p_buffer.size());
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}
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