195 lines
7.2 KiB
C++
195 lines
7.2 KiB
C++
/*************************************************************************/
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/* image_compress_squish.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_squish.h"
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#include <squish.h>
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void image_decompress_squish(Image *p_image) {
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int w = p_image->get_width();
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int h = p_image->get_height();
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Image::Format target_format = Image::FORMAT_RGBA8;
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PoolVector<uint8_t> data;
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int target_size = Image::get_image_data_size(w, h, target_format, p_image->has_mipmaps());
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int mm_count = p_image->get_mipmap_count();
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data.resize(target_size);
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PoolVector<uint8_t>::Read rb = p_image->get_data().read();
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PoolVector<uint8_t>::Write wb = data.write();
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int squish_flags = Image::FORMAT_MAX;
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if (p_image->get_format() == Image::FORMAT_DXT1) {
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squish_flags = squish::kDxt1;
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} else if (p_image->get_format() == Image::FORMAT_DXT3) {
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squish_flags = squish::kDxt3;
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} else if (p_image->get_format() == Image::FORMAT_DXT5) {
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squish_flags = squish::kDxt5;
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} else if (p_image->get_format() == Image::FORMAT_RGTC_R) {
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squish_flags = squish::kBc4;
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} else if (p_image->get_format() == Image::FORMAT_RGTC_RG) {
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squish_flags = squish::kBc5;
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} else {
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ERR_FAIL_MSG("Squish: Can't decompress unknown format: " + itos(p_image->get_format()) + ".");
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return;
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}
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for (int i = 0; i <= mm_count; i++) {
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int src_ofs = 0, mipmap_size = 0, mipmap_w = 0, mipmap_h = 0;
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p_image->get_mipmap_offset_size_and_dimensions(i, src_ofs, mipmap_size, mipmap_w, mipmap_h);
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int dst_ofs = Image::get_image_mipmap_offset(p_image->get_width(), p_image->get_height(), target_format, i);
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squish::DecompressImage(&wb[dst_ofs], w, h, &rb[src_ofs], squish_flags);
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w >>= 1;
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h >>= 1;
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}
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p_image->create(p_image->get_width(), p_image->get_height(), p_image->has_mipmaps(), target_format, data);
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}
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void image_compress_squish(Image *p_image, float p_lossy_quality, Image::CompressSource p_source) {
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if (p_image->get_format() >= Image::FORMAT_DXT1)
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return; //do not compress, already compressed
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int w = p_image->get_width();
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int h = p_image->get_height();
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if (p_image->get_format() <= Image::FORMAT_RGBA8) {
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int squish_comp = squish::kColourRangeFit;
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if (p_lossy_quality > 0.85)
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squish_comp = squish::kColourIterativeClusterFit;
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else if (p_lossy_quality > 0.75)
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squish_comp = squish::kColourClusterFit;
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Image::Format target_format = Image::FORMAT_RGBA8;
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Image::DetectChannels dc = p_image->get_detected_channels();
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if (p_source == Image::COMPRESS_SOURCE_LAYERED) {
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//keep what comes in
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switch (p_image->get_format()) {
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case Image::FORMAT_L8: {
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dc = Image::DETECTED_L;
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} break;
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case Image::FORMAT_LA8: {
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dc = Image::DETECTED_LA;
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} break;
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case Image::FORMAT_R8: {
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dc = Image::DETECTED_R;
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} break;
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case Image::FORMAT_RG8: {
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dc = Image::DETECTED_RG;
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} break;
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case Image::FORMAT_RGB8: {
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dc = Image::DETECTED_RGB;
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} break;
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case Image::FORMAT_RGBA8:
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case Image::FORMAT_RGBA4444:
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case Image::FORMAT_RGBA5551: {
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dc = Image::DETECTED_RGBA;
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} break;
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default: {
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}
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}
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}
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p_image->convert(Image::FORMAT_RGBA8); //still uses RGBA to convert
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if (p_source == Image::COMPRESS_SOURCE_SRGB && (dc == Image::DETECTED_R || dc == Image::DETECTED_RG)) {
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//R and RG do not support SRGB
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dc = Image::DETECTED_RGB;
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}
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if (p_source == Image::COMPRESS_SOURCE_NORMAL) {
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//R and RG do not support SRGB
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dc = Image::DETECTED_RG;
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}
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switch (dc) {
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case Image::DETECTED_L: {
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target_format = Image::FORMAT_DXT1;
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squish_comp |= squish::kDxt1;
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} break;
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case Image::DETECTED_LA: {
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target_format = Image::FORMAT_DXT5;
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squish_comp |= squish::kDxt5;
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} break;
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case Image::DETECTED_R: {
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target_format = Image::FORMAT_RGTC_R;
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squish_comp |= squish::kBc4;
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} break;
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case Image::DETECTED_RG: {
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target_format = Image::FORMAT_RGTC_RG;
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squish_comp |= squish::kBc5;
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} break;
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case Image::DETECTED_RGB: {
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target_format = Image::FORMAT_DXT1;
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squish_comp |= squish::kDxt1;
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} break;
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case Image::DETECTED_RGBA: {
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//TODO, should convert both, then measure which one does a better job
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target_format = Image::FORMAT_DXT5;
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squish_comp |= squish::kDxt5;
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} break;
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default: {
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ERR_PRINT("Unknown image format, defaulting to RGBA8");
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break;
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}
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}
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PoolVector<uint8_t> data;
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int target_size = Image::get_image_data_size(w, h, target_format, p_image->has_mipmaps());
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int mm_count = p_image->has_mipmaps() ? Image::get_image_required_mipmaps(w, h, target_format) : 0;
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data.resize(target_size);
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int shift = Image::get_format_pixel_rshift(target_format);
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PoolVector<uint8_t>::Read rb = p_image->get_data().read();
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PoolVector<uint8_t>::Write wb = data.write();
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int dst_ofs = 0;
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for (int i = 0; i <= mm_count; i++) {
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int bw = w % 4 != 0 ? w + (4 - w % 4) : w;
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int bh = h % 4 != 0 ? h + (4 - h % 4) : h;
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int src_ofs = p_image->get_mipmap_offset(i);
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squish::CompressImage(&rb[src_ofs], w, h, &wb[dst_ofs], squish_comp);
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dst_ofs += (MAX(4, bw) * MAX(4, bh)) >> shift;
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w = MAX(w / 2, 1);
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h = MAX(h / 2, 1);
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}
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rb.release();
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wb.release();
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p_image->create(p_image->get_width(), p_image->get_height(), p_image->has_mipmaps(), target_format, data);
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}
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}
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