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/*************************************************************************/
/* image_compress_squish.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "image_compress_squish.h"
#include "print_string.h"
#include <squish.h>
void image_compress_squish(Image *p_image) {
int w = p_image->get_width();
int h = p_image->get_height();
if (!p_image->has_mipmaps()) {
ERR_FAIL_COND(!w || w % 4 != 0);
ERR_FAIL_COND(!h || h % 4 != 0);
} else {
ERR_FAIL_COND(!w || w != nearest_power_of_2(w));
ERR_FAIL_COND(!h || h != nearest_power_of_2(h));
};
if (p_image->get_format() >= Image::FORMAT_DXT1)
return; //do not compress, already compressed
int shift = 0;
int squish_comp = squish::kColourRangeFit;
Image::Format target_format;
if (p_image->get_format() == Image::FORMAT_LA8) {
//compressed normalmap
target_format = Image::FORMAT_DXT5;
squish_comp |= squish::kDxt5;
} else if (p_image->detect_alpha() != Image::ALPHA_NONE) {
target_format = Image::FORMAT_DXT3;
squish_comp |= squish::kDxt3;
} else {
target_format = Image::FORMAT_DXT1;
shift = 1;
squish_comp |= squish::kDxt1;
}
p_image->convert(Image::FORMAT_RGBA8); //always expects rgba
PoolVector<uint8_t> data;
int target_size = Image::get_image_data_size(w, h, target_format, p_image->has_mipmaps() ? -1 : 0);
int mm_count = p_image->has_mipmaps() ? Image::get_image_required_mipmaps(w, h, target_format) : 0;
data.resize(target_size);
PoolVector<uint8_t>::Read rb = p_image->get_data().read();
PoolVector<uint8_t>::Write wb = data.write();
int dst_ofs = 0;
for (int i = 0; i <= mm_count; i++) {
int src_ofs = p_image->get_mipmap_offset(i);
squish::CompressImage(&rb[src_ofs], w, h, &wb[dst_ofs], squish_comp);
dst_ofs += (MAX(4, w) * MAX(4, h)) >> shift;
w >>= 1;
h >>= 1;
}
rb = PoolVector<uint8_t>::Read();
wb = PoolVector<uint8_t>::Write();
p_image->create(p_image->get_width(), p_image->get_height(), p_image->has_mipmaps(), target_format, data);
}
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