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/*************************************************************************/
/* image_compress_pvrtc.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2022 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/ref_counted.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);
// Resizing can fail for some formats
if (!img->is_size_po2() || img->get_width() != img->get_height()) {
ERR_FAIL_MSG("Failed to resize the image for compression.");
}
}
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.instantiate();
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();
memcpy(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;
}
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