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Use libsquish to decompress DXT textures.

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This commit is contained in:
Ferenc Arn
2017-04-29 20:14:14 -05:00
parent a75623f436
commit 3c175115eb
5 changed files with 47 additions and 328 deletions
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42
modules/squish/image_compress_squish.cpp
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@@ -39,6 +39,46 @@
#include <squish.h>
void image_decompress_squish(Image *p_image) {
int w = p_image->get_width();
int h = p_image->get_height();
Image::Format target_format = Image::FORMAT_RGBA8;
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->get_mipmap_count();
data.resize(target_size);
PoolVector<uint8_t>::Read rb = p_image->get_data().read();
PoolVector<uint8_t>::Write wb = data.write();
int squish_flags = Image::FORMAT_MAX;
if (p_image->get_format() == Image::FORMAT_DXT1) {
squish_flags = squish::kDxt1;
} else if (p_image->get_format() == Image::FORMAT_DXT3) {
squish_flags = squish::kDxt3;
} else if (p_image->get_format() == Image::FORMAT_DXT5) {
squish_flags = squish::kDxt5;
} else if (p_image->get_format() == Image::FORMAT_ATI1) {
squish_flags = squish::kBc4;
} else if (p_image->get_format() == Image::FORMAT_ATI2) {
squish_flags = squish::kBc5;
} else {
ERR_FAIL_COND(true);
return;
}
int dst_ofs = 0;
for (int i = 0; i <= mm_count; i++) {
int src_ofs = 0, mipmap_size = 0, mipmap_w = 0, mipmap_h = 0;
p_image->get_mipmap_offset_size_and_dimensions(i, src_ofs, mipmap_size, mipmap_w, mipmap_h);
squish::DecompressImage(&wb[dst_ofs], mipmap_w, mipmap_h, &rb[src_ofs], squish_flags);
}
p_image->create(p_image->get_width(), p_image->get_height(), p_image->has_mipmaps(), target_format, data);
}
void image_compress_squish(Image *p_image) {
int w = p_image->get_width();
@@ -56,7 +96,7 @@ void image_compress_squish(Image *p_image) {
return; //do not compress, already compressed
int shift = 0;
int squish_comp = squish::kColourRangeFit;
int squish_comp = squish::kColourRangeFit; // TODO: use lossy quality setting to determine the quality
Image::Format target_format;
if (p_image->get_format() == Image::FORMAT_LA8) {