/*************************************************************************/ /* image_compress_squish.cpp */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */ /* */ /* 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 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 data; int target_size = Image::get_image_data_size(w, h, target_format, p_image->has_mipmaps()); int mm_count = p_image->get_mipmap_count(); data.resize(target_size); PoolVector::Read rb = p_image->get_data().read(); PoolVector::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 || p_image->get_format() == Image::FORMAT_DXT5_RA_AS_RG) { squish_flags = squish::kDxt5; } else if (p_image->get_format() == Image::FORMAT_RGTC_R) { squish_flags = squish::kBc4; } else if (p_image->get_format() == Image::FORMAT_RGTC_RG) { squish_flags = squish::kBc5; } else { ERR_FAIL_MSG("Squish: Can't decompress unknown format: " + itos(p_image->get_format()) + "."); return; } 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); int dst_ofs = Image::get_image_mipmap_offset(p_image->get_width(), p_image->get_height(), target_format, i); squish::DecompressImage(&wb[dst_ofs], w, h, &rb[src_ofs], squish_flags); w >>= 1; h >>= 1; } p_image->create(p_image->get_width(), p_image->get_height(), p_image->has_mipmaps(), target_format, data); if (p_image->get_format() == Image::FORMAT_DXT5_RA_AS_RG) { p_image->convert_ra_rgba8_to_rg(); } } void image_compress_squish(Image *p_image, float p_lossy_quality, Image::UsedChannels p_channels) { if (p_image->get_format() >= Image::FORMAT_DXT1) return; //do not compress, already compressed int w = p_image->get_width(); int h = p_image->get_height(); if (p_image->get_format() <= Image::FORMAT_RGBA8) { int squish_comp = squish::kColourRangeFit; if (p_lossy_quality > 0.85) squish_comp = squish::kColourIterativeClusterFit; else if (p_lossy_quality > 0.75) squish_comp = squish::kColourClusterFit; Image::Format target_format = Image::FORMAT_RGBA8; p_image->convert(Image::FORMAT_RGBA8); //still uses RGBA to convert switch (p_channels) { case Image::USED_CHANNELS_L: { target_format = Image::FORMAT_DXT1; squish_comp |= squish::kDxt1; } break; case Image::USED_CHANNELS_LA: { target_format = Image::FORMAT_DXT5; squish_comp |= squish::kDxt5; } break; case Image::USED_CHANNELS_R: { target_format = Image::FORMAT_RGTC_R; squish_comp |= squish::kBc4; } break; case Image::USED_CHANNELS_RG: { target_format = Image::FORMAT_RGTC_RG; squish_comp |= squish::kBc5; } break; case Image::USED_CHANNELS_RGB: { target_format = Image::FORMAT_DXT1; squish_comp |= squish::kDxt1; } break; case Image::USED_CHANNELS_RGBA: { //TODO, should convert both, then measure which one does a better job target_format = Image::FORMAT_DXT5; squish_comp |= squish::kDxt5; } break; default: { ERR_PRINT("Unknown image format, defaulting to RGBA8"); break; } } PoolVector data; int target_size = Image::get_image_data_size(w, h, target_format, p_image->has_mipmaps()); int mm_count = p_image->has_mipmaps() ? Image::get_image_required_mipmaps(w, h, target_format) : 0; data.resize(target_size); int shift = Image::get_format_pixel_rshift(target_format); PoolVector::Read rb = p_image->get_data().read(); PoolVector::Write wb = data.write(); int dst_ofs = 0; for (int i = 0; i <= mm_count; i++) { int bw = w % 4 != 0 ? w + (4 - w % 4) : w; int bh = h % 4 != 0 ? h + (4 - h % 4) : h; 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, bw) * MAX(4, bh)) >> shift; w = MAX(w / 2, 1); h = MAX(h / 2, 1); } rb.release(); wb.release(); p_image->create(p_image->get_width(), p_image->get_height(), p_image->has_mipmaps(), target_format, data); } }