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89 lines
3.9 KiB
C++
89 lines
3.9 KiB
C++
/*************************************************************************/
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/* image_compress_pvrtc.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "image_compress_pvrtc.h"
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#include "core/io/image.h"
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#include "core/object/ref_counted.h"
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#include <PvrTcEncoder.h>
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#include <RgbaBitmap.h>
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static void _compress_pvrtc1_4bpp(Image *p_img) {
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Ref<Image> img = p_img->duplicate();
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bool make_mipmaps = false;
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if (!img->is_size_po2() || img->get_width() != img->get_height()) {
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make_mipmaps = img->has_mipmaps();
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img->resize_to_po2(true);
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// Resizing can fail for some formats
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if (!img->is_size_po2() || img->get_width() != img->get_height()) {
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ERR_FAIL_MSG("Failed to resize the image for compression.");
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}
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}
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img->convert(Image::FORMAT_RGBA8);
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if (!img->has_mipmaps() && make_mipmaps) {
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img->generate_mipmaps();
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}
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bool use_alpha = img->detect_alpha();
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Ref<Image> new_img;
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new_img.instantiate();
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new_img->create(img->get_width(), img->get_height(), img->has_mipmaps(), use_alpha ? Image::FORMAT_PVRTC1_4A : Image::FORMAT_PVRTC1_4);
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Vector<uint8_t> data = new_img->get_data();
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{
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uint8_t *wr = data.ptrw();
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const uint8_t *r = img->get_data().ptr();
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for (int i = 0; i <= new_img->get_mipmap_count(); i++) {
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int ofs, size, w, h;
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img->get_mipmap_offset_size_and_dimensions(i, ofs, size, w, h);
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Javelin::RgbaBitmap bm(w, h);
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void *dst = (void *)bm.GetData();
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memcpy(dst, &r[ofs], size);
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Javelin::ColorRgba<unsigned char> *dp = bm.GetData();
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for (int j = 0; j < size / 4; j++) {
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// Red and blue colors are swapped.
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SWAP(dp[j].r, dp[j].b);
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}
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new_img->get_mipmap_offset_size_and_dimensions(i, ofs, size, w, h);
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Javelin::PvrTcEncoder::EncodeRgba4Bpp(&wr[ofs], bm);
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}
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}
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p_img->create(new_img->get_width(), new_img->get_height(), new_img->has_mipmaps(), new_img->get_format(), data);
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}
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void _register_pvrtc_compress_func() {
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Image::_image_compress_pvrtc1_4bpp_func = _compress_pvrtc1_4bpp;
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}
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