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https://github.com/godotengine/godot
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96 lines
3.9 KiB
C++
96 lines
3.9 KiB
C++
/**************************************************************************/
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/* image_decompress_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) 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_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 source_format = p_image->get_format();
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Image::Format target_format = Image::FORMAT_RGBA8;
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Vector<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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const uint8_t *rb = p_image->get_data().ptr();
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uint8_t *wb = data.ptrw();
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int squish_flags = 0;
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switch (source_format) {
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case Image::FORMAT_DXT1:
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squish_flags = squish::kDxt1;
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break;
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case Image::FORMAT_DXT3:
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squish_flags = squish::kDxt3;
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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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squish_flags = squish::kDxt5;
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break;
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case Image::FORMAT_RGTC_R:
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squish_flags = squish::kBc4;
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break;
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case Image::FORMAT_RGTC_RG:
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squish_flags = squish::kBc5;
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break;
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default:
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ERR_FAIL_MSG("Squish: Can't decompress unknown format: " + itos(p_image->get_format()) + ".");
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break;
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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->set_data(p_image->get_width(), p_image->get_height(), p_image->has_mipmaps(), target_format, data);
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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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}
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