0ab928e060
Avoid unnecessary allocation of temporary buffers for each mip, and creates only one Image with the compressed data. Also renames variable and reorders code for clarity. Clarify that squish is now only used for decompression. Documented which formats can be decompressed in Image.
185 lines
8 KiB
C++
185 lines
8 KiB
C++
/*************************************************************************/
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/* image_compress_etcpak.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) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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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_etcpak.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 "thirdparty/etcpak/ProcessDxtc.hpp"
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#include "thirdparty/etcpak/ProcessRGB.hpp"
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EtcpakType _determine_etc_type(Image::UsedChannels p_channels) {
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switch (p_channels) {
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case Image::USED_CHANNELS_L:
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return EtcpakType::ETCPAK_TYPE_ETC1;
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case Image::USED_CHANNELS_LA:
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return EtcpakType::ETCPAK_TYPE_ETC2_ALPHA;
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case Image::USED_CHANNELS_R:
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return EtcpakType::ETCPAK_TYPE_ETC2;
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case Image::USED_CHANNELS_RG:
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return EtcpakType::ETCPAK_TYPE_ETC2_RA_AS_RG;
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case Image::USED_CHANNELS_RGB:
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return EtcpakType::ETCPAK_TYPE_ETC2;
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case Image::USED_CHANNELS_RGBA:
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return EtcpakType::ETCPAK_TYPE_ETC2_ALPHA;
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default:
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return EtcpakType::ETCPAK_TYPE_ETC2_ALPHA;
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}
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}
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EtcpakType _determine_dxt_type(Image::UsedChannels p_channels) {
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switch (p_channels) {
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case Image::USED_CHANNELS_L:
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return EtcpakType::ETCPAK_TYPE_DXT1;
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case Image::USED_CHANNELS_LA:
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return EtcpakType::ETCPAK_TYPE_DXT5;
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case Image::USED_CHANNELS_R:
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return EtcpakType::ETCPAK_TYPE_DXT5;
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case Image::USED_CHANNELS_RG:
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return EtcpakType::ETCPAK_TYPE_DXT5_RA_AS_RG;
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case Image::USED_CHANNELS_RGB:
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return EtcpakType::ETCPAK_TYPE_DXT5;
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case Image::USED_CHANNELS_RGBA:
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return EtcpakType::ETCPAK_TYPE_DXT5;
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default:
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return EtcpakType::ETCPAK_TYPE_DXT5;
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}
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}
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void _compress_etc1(Image *r_img, float p_lossy_quality) {
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_compress_etcpak(EtcpakType::ETCPAK_TYPE_ETC1, r_img, p_lossy_quality);
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}
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void _compress_etc2(Image *r_img, float p_lossy_quality, Image::UsedChannels p_channels) {
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EtcpakType type = _determine_etc_type(p_channels);
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_compress_etcpak(type, r_img, p_lossy_quality);
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}
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void _compress_bc(Image *r_img, float p_lossy_quality, Image::UsedChannels p_channels) {
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EtcpakType type = _determine_dxt_type(p_channels);
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_compress_etcpak(type, r_img, p_lossy_quality);
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}
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void _compress_etcpak(EtcpakType p_compresstype, Image *r_img, float p_lossy_quality) {
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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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if (img_format > Image::FORMAT_RGBA8) {
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// TODO: we should be able to handle FORMAT_RGBA4444 and FORMAT_RGBA5551 eventually
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return;
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}
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// Use RGBA8 to convert.
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if (img_format != Image::FORMAT_RGBA8) {
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r_img->convert(Image::FORMAT_RGBA8);
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}
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// Determine output format based on Etcpak type.
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Image::Format target_format = Image::FORMAT_RGBA8;
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if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC1) {
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target_format = Image::FORMAT_ETC;
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} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2) {
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target_format = Image::FORMAT_ETC2_RGB8;
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} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2_RA_AS_RG) {
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target_format = Image::FORMAT_ETC2_RA_AS_RG;
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r_img->convert_rg_to_ra_rgba8();
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} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2_ALPHA) {
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target_format = Image::FORMAT_ETC2_RGBA8;
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} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_DXT1) {
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target_format = Image::FORMAT_DXT1;
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} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_DXT5_RA_AS_RG) {
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target_format = Image::FORMAT_DXT5_RA_AS_RG;
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r_img->convert_rg_to_ra_rgba8();
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} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_DXT5) {
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target_format = Image::FORMAT_DXT5;
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} else {
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ERR_FAIL_MSG("Invalid or unsupported Etcpak compression format.");
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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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const int width = r_img->get_width();
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const int height = r_img->get_height();
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const uint8_t *src_read = r_img->get_data().ptr();
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print_verbose(vformat("ETCPAK: Encoding image size %dx%d to format %s.", width, height, Image::get_format_name(target_format)));
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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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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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// Get write mip metrics for target image.
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int mip_w, mip_h;
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int mip_ofs = Image::get_image_mipmap_offset_and_dimensions(width, height, target_format, i, mip_w, 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(mip_ofs % 8 != 0);
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uint64_t *dest_mip_write = (uint64_t *)&dest_write[mip_ofs];
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// Block size. Align stride to multiple of 4 (RGBA8).
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mip_w = (mip_w + 3) & ~3;
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mip_h = (mip_h + 3) & ~3;
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const uint32_t blocks = mip_w * mip_h / 16;
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// Get mip data from source image for reading.
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int src_mip_ofs = r_img->get_mipmap_offset(i);
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const uint32_t *src_mip_read = (const uint32_t *)&src_read[src_mip_ofs];
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if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC1) {
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CompressEtc1RgbDither(src_mip_read, dest_mip_write, blocks, mip_w);
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} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2 || p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2_RA_AS_RG) {
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CompressEtc2Rgb(src_mip_read, dest_mip_write, blocks, mip_w);
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} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2_ALPHA) {
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CompressEtc2Rgba(src_mip_read, dest_mip_write, blocks, mip_w);
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} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_DXT1) {
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CompressDxt1Dither(src_mip_read, dest_mip_write, blocks, mip_w);
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} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_DXT5 || p_compresstype == EtcpakType::ETCPAK_TYPE_DXT5_RA_AS_RG) {
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CompressDxt5(src_mip_read, dest_mip_write, blocks, mip_w);
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} else {
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ERR_FAIL_MSG("Invalid or unsupported Etcpak compression format.");
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}
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}
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// Replace original image with compressed one.
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r_img->create(width, height, mipmaps, target_format, dest_data);
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print_verbose(vformat("ETCPAK encode took %s ms.", rtos(OS::get_singleton()->get_ticks_msec() - start_time)));
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}
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