diff options
Diffstat (limited to 'modules/etcpak/image_compress_etcpak.cpp')
| -rw-r--r-- | modules/etcpak/image_compress_etcpak.cpp | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/modules/etcpak/image_compress_etcpak.cpp b/modules/etcpak/image_compress_etcpak.cpp new file mode 100644 index 0000000000..abc3c26188 --- /dev/null +++ b/modules/etcpak/image_compress_etcpak.cpp @@ -0,0 +1,184 @@ +/*************************************************************************/ +/* image_compress_etcpak.cpp */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* https://godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */ +/* Copyright (c) 2014-2021 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_etcpak.h" + +#include "core/os/os.h" +#include "core/string/print_string.h" + +#include "thirdparty/etcpak/ProcessDxtc.hpp" +#include "thirdparty/etcpak/ProcessRGB.hpp" + +EtcpakType _determine_etc_type(Image::UsedChannels p_channels) { + switch (p_channels) { + case Image::USED_CHANNELS_L: + return EtcpakType::ETCPAK_TYPE_ETC1; + case Image::USED_CHANNELS_LA: + return EtcpakType::ETCPAK_TYPE_ETC2_ALPHA; + case Image::USED_CHANNELS_R: + return EtcpakType::ETCPAK_TYPE_ETC2; + case Image::USED_CHANNELS_RG: + return EtcpakType::ETCPAK_TYPE_ETC2_RA_AS_RG; + case Image::USED_CHANNELS_RGB: + return EtcpakType::ETCPAK_TYPE_ETC2; + case Image::USED_CHANNELS_RGBA: + return EtcpakType::ETCPAK_TYPE_ETC2_ALPHA; + default: + return EtcpakType::ETCPAK_TYPE_ETC2_ALPHA; + } +} + +EtcpakType _determine_dxt_type(Image::UsedChannels p_channels) { + switch (p_channels) { + case Image::USED_CHANNELS_L: + return EtcpakType::ETCPAK_TYPE_DXT1; + case Image::USED_CHANNELS_LA: + return EtcpakType::ETCPAK_TYPE_DXT5; + case Image::USED_CHANNELS_R: + return EtcpakType::ETCPAK_TYPE_DXT5; + case Image::USED_CHANNELS_RG: + return EtcpakType::ETCPAK_TYPE_DXT5_RA_AS_RG; + case Image::USED_CHANNELS_RGB: + return EtcpakType::ETCPAK_TYPE_DXT5; + case Image::USED_CHANNELS_RGBA: + return EtcpakType::ETCPAK_TYPE_DXT5; + default: + return EtcpakType::ETCPAK_TYPE_DXT5; + } +} + +void _compress_etc1(Image *r_img, float p_lossy_quality) { + _compress_etcpak(EtcpakType::ETCPAK_TYPE_ETC1, r_img, p_lossy_quality); +} + +void _compress_etc2(Image *r_img, float p_lossy_quality, Image::UsedChannels p_channels) { + EtcpakType type = _determine_etc_type(p_channels); + _compress_etcpak(type, r_img, p_lossy_quality); +} + +void _compress_bc(Image *r_img, float p_lossy_quality, Image::UsedChannels p_channels) { + EtcpakType type = _determine_dxt_type(p_channels); + _compress_etcpak(type, r_img, p_lossy_quality); +} + +void _compress_etcpak(EtcpakType p_compresstype, Image *r_img, float p_lossy_quality) { + uint64_t start_time = OS::get_singleton()->get_ticks_msec(); + + // TODO: See how to handle lossy quality. + + Image::Format img_format = r_img->get_format(); + if (img_format >= Image::FORMAT_DXT1) { + return; // Do not compress, already compressed. + } + if (img_format > Image::FORMAT_RGBA8) { + // TODO: we should be able to handle FORMAT_RGBA4444 and FORMAT_RGBA5551 eventually + return; + } + + // Use RGBA8 to convert. + if (img_format != Image::FORMAT_RGBA8) { + r_img->convert(Image::FORMAT_RGBA8); + } + + // Determine output format based on Etcpak type. + Image::Format target_format = Image::FORMAT_RGBA8; + if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC1) { + target_format = Image::FORMAT_ETC; + } else if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2) { + target_format = Image::FORMAT_ETC2_RGB8; + } else if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2_RA_AS_RG) { + target_format = Image::FORMAT_ETC2_RA_AS_RG; + r_img->convert_rg_to_ra_rgba8(); + } else if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2_ALPHA) { + target_format = Image::FORMAT_ETC2_RGBA8; + } else if (p_compresstype == EtcpakType::ETCPAK_TYPE_DXT1) { + target_format = Image::FORMAT_DXT1; + } else if (p_compresstype == EtcpakType::ETCPAK_TYPE_DXT5_RA_AS_RG) { + target_format = Image::FORMAT_DXT5_RA_AS_RG; + r_img->convert_rg_to_ra_rgba8(); + } else if (p_compresstype == EtcpakType::ETCPAK_TYPE_DXT5) { + target_format = Image::FORMAT_DXT5; + } else { + ERR_FAIL_MSG("Invalid or unsupported Etcpak compression format."); + } + + // Compress image data and (if required) mipmaps. + + const bool mipmaps = r_img->has_mipmaps(); + const int width = r_img->get_width(); + const int height = r_img->get_height(); + const uint8_t *src_read = r_img->get_data().ptr(); + + print_verbose(vformat("ETCPAK: Encoding image size %dx%d to format %s.", width, height, Image::get_format_name(target_format))); + + int dest_size = Image::get_image_data_size(width, height, target_format, mipmaps); + Vector<uint8_t> dest_data; + dest_data.resize(dest_size); + uint8_t *dest_write = dest_data.ptrw(); + + int mip_count = mipmaps ? Image::get_image_required_mipmaps(width, height, target_format) : 0; + + for (int i = 0; i < mip_count + 1; i++) { + // Get write mip metrics for target image. + int mip_w, mip_h; + int mip_ofs = Image::get_image_mipmap_offset_and_dimensions(width, height, target_format, i, mip_w, mip_h); + // Ensure that mip offset is a multiple of 8 (etcpak expects uint64_t pointer). + ERR_FAIL_COND(mip_ofs % 8 != 0); + uint64_t *dest_mip_write = (uint64_t *)&dest_write[mip_ofs]; + + // Block size. Align stride to multiple of 4 (RGBA8). + mip_w = (mip_w + 3) & ~3; + mip_h = (mip_h + 3) & ~3; + const uint32_t blocks = mip_w * mip_h / 16; + + // Get mip data from source image for reading. + int src_mip_ofs = r_img->get_mipmap_offset(i); + const uint32_t *src_mip_read = (const uint32_t *)&src_read[src_mip_ofs]; + + if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC1) { + CompressEtc1RgbDither(src_mip_read, dest_mip_write, blocks, mip_w); + } else if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2 || p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2_RA_AS_RG) { + CompressEtc2Rgb(src_mip_read, dest_mip_write, blocks, mip_w); + } else if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2_ALPHA) { + CompressEtc2Rgba(src_mip_read, dest_mip_write, blocks, mip_w); + } else if (p_compresstype == EtcpakType::ETCPAK_TYPE_DXT1) { + CompressDxt1Dither(src_mip_read, dest_mip_write, blocks, mip_w); + } else if (p_compresstype == EtcpakType::ETCPAK_TYPE_DXT5 || p_compresstype == EtcpakType::ETCPAK_TYPE_DXT5_RA_AS_RG) { + CompressDxt5(src_mip_read, dest_mip_write, blocks, mip_w); + } else { + ERR_FAIL_MSG("Invalid or unsupported Etcpak compression format."); + } + } + + // Replace original image with compressed one. + r_img->create(width, height, mipmaps, target_format, dest_data); + + print_verbose(vformat("ETCPAK encode took %s ms.", rtos(OS::get_singleton()->get_ticks_msec() - start_time))); +} |