70ae90e0e8
We've been using standard C library functions `memcpy`/`memset` for these since
2016 with 67f65f6639.
There was still the possibility for third-party platform ports to override the
definitions with a custom header, but this doesn't seem useful anymore.
Backport of #48239.
113 lines
4.3 KiB
C++
113 lines
4.3 KiB
C++
/*************************************************************************/
|
|
/* image_loader_png.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_loader_png.h"
|
|
|
|
#include "core/os/os.h"
|
|
#include "core/print_string.h"
|
|
#include "drivers/png/png_driver_common.h"
|
|
|
|
#include <string.h>
|
|
|
|
Error ImageLoaderPNG::load_image(Ref<Image> p_image, FileAccess *f, bool p_force_linear, float p_scale) {
|
|
|
|
const size_t buffer_size = f->get_len();
|
|
PoolVector<uint8_t> file_buffer;
|
|
Error err = file_buffer.resize(buffer_size);
|
|
if (err) {
|
|
f->close();
|
|
return err;
|
|
}
|
|
{
|
|
PoolVector<uint8_t>::Write writer = file_buffer.write();
|
|
f->get_buffer(writer.ptr(), buffer_size);
|
|
f->close();
|
|
}
|
|
PoolVector<uint8_t>::Read reader = file_buffer.read();
|
|
return PNGDriverCommon::png_to_image(reader.ptr(), buffer_size, p_force_linear, p_image);
|
|
}
|
|
|
|
void ImageLoaderPNG::get_recognized_extensions(List<String> *p_extensions) const {
|
|
|
|
p_extensions->push_back("png");
|
|
}
|
|
|
|
Ref<Image> ImageLoaderPNG::load_mem_png(const uint8_t *p_png, int p_size) {
|
|
|
|
Ref<Image> img;
|
|
img.instance();
|
|
|
|
// the value of p_force_linear does not matter since it only applies to 16 bit
|
|
Error err = PNGDriverCommon::png_to_image(p_png, p_size, false, img);
|
|
ERR_FAIL_COND_V(err, Ref<Image>());
|
|
|
|
return img;
|
|
}
|
|
|
|
Ref<Image> ImageLoaderPNG::lossless_unpack_png(const PoolVector<uint8_t> &p_data) {
|
|
|
|
const int len = p_data.size();
|
|
ERR_FAIL_COND_V(len < 4, Ref<Image>());
|
|
PoolVector<uint8_t>::Read r = p_data.read();
|
|
ERR_FAIL_COND_V(r[0] != 'P' || r[1] != 'N' || r[2] != 'G' || r[3] != ' ', Ref<Image>());
|
|
return load_mem_png(&r[4], len - 4);
|
|
}
|
|
|
|
PoolVector<uint8_t> ImageLoaderPNG::lossless_pack_png(const Ref<Image> &p_image) {
|
|
|
|
PoolVector<uint8_t> out_buffer;
|
|
|
|
// add Godot's own "PNG " prefix
|
|
if (out_buffer.resize(4) != OK) {
|
|
ERR_FAIL_V(PoolVector<uint8_t>());
|
|
}
|
|
|
|
// scope for writer lifetime
|
|
{
|
|
// must be closed before call to image_to_png
|
|
PoolVector<uint8_t>::Write writer = out_buffer.write();
|
|
memcpy(writer.ptr(), "PNG ", 4);
|
|
}
|
|
|
|
Error err = PNGDriverCommon::image_to_png(p_image, out_buffer);
|
|
if (err) {
|
|
ERR_FAIL_V(PoolVector<uint8_t>());
|
|
}
|
|
|
|
return out_buffer;
|
|
}
|
|
|
|
ImageLoaderPNG::ImageLoaderPNG() {
|
|
|
|
Image::_png_mem_loader_func = load_mem_png;
|
|
Image::lossless_unpacker = lossless_unpack_png;
|
|
Image::lossless_packer = lossless_pack_png;
|
|
}
|