mirror of
https://github.com/godotengine/godot.git
synced 2024-11-22 04:06:14 +00:00
47d991678d
Update scene/resources/portable_compressed_texture.cpp Co-authored-by: Rémi Verschelde <rverschelde@gmail.com>
108 lines
4.4 KiB
C++
108 lines
4.4 KiB
C++
/**************************************************************************/
|
|
/* image_loader_png.cpp */
|
|
/**************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/**************************************************************************/
|
|
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
|
|
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
|
|
/* */
|
|
/* 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/string/print_string.h"
|
|
#include "drivers/png/png_driver_common.h"
|
|
|
|
#include <string.h>
|
|
|
|
Error ImageLoaderPNG::load_image(Ref<Image> p_image, Ref<FileAccess> f, BitField<ImageFormatLoader::LoaderFlags> p_flags, float p_scale) {
|
|
const uint64_t buffer_size = f->get_length();
|
|
Vector<uint8_t> file_buffer;
|
|
Error err = file_buffer.resize(buffer_size);
|
|
if (err) {
|
|
return err;
|
|
}
|
|
{
|
|
uint8_t *writer = file_buffer.ptrw();
|
|
f->get_buffer(writer, buffer_size);
|
|
}
|
|
const uint8_t *reader = file_buffer.ptr();
|
|
return PNGDriverCommon::png_to_image(reader, buffer_size, p_flags & FLAG_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.instantiate();
|
|
|
|
// 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::unpack_mem_png(const uint8_t *p_png, int p_size) {
|
|
ERR_FAIL_COND_V(p_size < 4, Ref<Image>());
|
|
ERR_FAIL_COND_V(p_png[0] != 'P' || p_png[1] != 'N' || p_png[2] != 'G' || p_png[3] != ' ', Ref<Image>());
|
|
return load_mem_png(&p_png[4], p_size - 4);
|
|
}
|
|
|
|
Ref<Image> ImageLoaderPNG::lossless_unpack_png(const Vector<uint8_t> &p_data) {
|
|
return unpack_mem_png(p_data.ptr(), p_data.size());
|
|
}
|
|
|
|
Vector<uint8_t> ImageLoaderPNG::lossless_pack_png(const Ref<Image> &p_image) {
|
|
Vector<uint8_t> out_buffer;
|
|
|
|
// add Godot's own "PNG " prefix
|
|
if (out_buffer.resize(4) != OK) {
|
|
ERR_FAIL_V(Vector<uint8_t>());
|
|
}
|
|
|
|
// scope for writer lifetime
|
|
{
|
|
// must be closed before call to image_to_png
|
|
uint8_t *writer = out_buffer.ptrw();
|
|
memcpy(writer, "PNG ", 4);
|
|
}
|
|
|
|
Error err = PNGDriverCommon::image_to_png(p_image, out_buffer);
|
|
if (err) {
|
|
ERR_FAIL_V(Vector<uint8_t>());
|
|
}
|
|
|
|
return out_buffer;
|
|
}
|
|
|
|
ImageLoaderPNG::ImageLoaderPNG() {
|
|
Image::_png_mem_loader_func = load_mem_png;
|
|
Image::_png_mem_unpacker_func = unpack_mem_png;
|
|
Image::png_unpacker = lossless_unpack_png;
|
|
Image::png_packer = lossless_pack_png;
|
|
}
|