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Diffstat (limited to 'modules/pvr/image_compress_pvrtc.cpp')
| -rw-r--r-- | modules/pvr/image_compress_pvrtc.cpp | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/modules/pvr/image_compress_pvrtc.cpp b/modules/pvr/image_compress_pvrtc.cpp new file mode 100644 index 0000000000..d2d8976694 --- /dev/null +++ b/modules/pvr/image_compress_pvrtc.cpp @@ -0,0 +1,84 @@ +/*************************************************************************/ +/* image_compress_pvrtc.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_pvrtc.h" + +#include "core/io/image.h" +#include "core/object/reference.h" + +#include <PvrTcEncoder.h> +#include <RgbaBitmap.h> + +static void _compress_pvrtc1_4bpp(Image *p_img) { + Ref<Image> img = p_img->duplicate(); + + bool make_mipmaps = false; + if (!img->is_size_po2() || img->get_width() != img->get_height()) { + make_mipmaps = img->has_mipmaps(); + img->resize_to_po2(true); + } + img->convert(Image::FORMAT_RGBA8); + if (!img->has_mipmaps() && make_mipmaps) { + img->generate_mipmaps(); + } + + bool use_alpha = img->detect_alpha(); + + Ref<Image> new_img; + new_img.instance(); + new_img->create(img->get_width(), img->get_height(), img->has_mipmaps(), use_alpha ? Image::FORMAT_PVRTC1_4A : Image::FORMAT_PVRTC1_4); + + Vector<uint8_t> data = new_img->get_data(); + { + uint8_t *wr = data.ptrw(); + const uint8_t *r = img->get_data().ptr(); + + for (int i = 0; i <= new_img->get_mipmap_count(); i++) { + int ofs, size, w, h; + img->get_mipmap_offset_size_and_dimensions(i, ofs, size, w, h); + Javelin::RgbaBitmap bm(w, h); + void *dst = (void *)bm.GetData(); + copymem(dst, &r[ofs], size); + Javelin::ColorRgba<unsigned char> *dp = bm.GetData(); + for (int j = 0; j < size / 4; j++) { + // Red and blue colors are swapped. + SWAP(dp[j].r, dp[j].b); + } + new_img->get_mipmap_offset_size_and_dimensions(i, ofs, size, w, h); + Javelin::PvrTcEncoder::EncodeRgba4Bpp(&wr[ofs], bm); + } + } + + p_img->create(new_img->get_width(), new_img->get_height(), new_img->has_mipmaps(), new_img->get_format(), data); +} + +void _register_pvrtc_compress_func() { + Image::_image_compress_pvrtc1_4bpp_func = _compress_pvrtc1_4bpp; +} |