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Diffstat (limited to 'modules/squish/image_compress_squish.cpp')
| -rw-r--r-- | modules/squish/image_compress_squish.cpp | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/modules/squish/image_compress_squish.cpp b/modules/squish/image_compress_squish.cpp new file mode 100644 index 0000000000..ac7c935ceb --- /dev/null +++ b/modules/squish/image_compress_squish.cpp @@ -0,0 +1,92 @@ +/*************************************************************************/ +/* image_compress_squish.cpp */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* http://www.godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2016 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->get_mipmaps() == 0) { + 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_BC1) + 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_GRAYSCALE_ALPHA) { + //compressed normalmap + target_format = Image::FORMAT_BC3; squish_comp|=squish::kDxt5;; + } else if (p_image->detect_alpha()!=Image::ALPHA_NONE) { + + target_format = Image::FORMAT_BC2; squish_comp|=squish::kDxt3;; + } else { + target_format = Image::FORMAT_BC1; shift=1; squish_comp|=squish::kDxt1;; + } + + p_image->convert(Image::FORMAT_RGBA); //always expects rgba + + int mm_count = p_image->get_mipmaps(); + + DVector<uint8_t> data; + int target_size = Image::get_image_data_size(w,h,target_format,mm_count); + data.resize(target_size); + + DVector<uint8_t>::Read rb = p_image->get_data().read(); + DVector<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 = DVector<uint8_t>::Read(); + wb = DVector<uint8_t>::Write(); + + p_image->create(p_image->get_width(),p_image->get_height(),p_image->get_mipmaps(),target_format,data); + +} |