godot/modules/webp/image_loader_webp.cpp

/*************************************************************************/
/*  image_loader_webp.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_loader_webp.h"

#include "core/config/project_settings.h"
#include "core/io/marshalls.h"
#include "core/os/os.h"
#include "core/string/print_string.h"
#include "webp_common.h"

#include <stdlib.h>
#include <webp/decode.h>
#include <webp/encode.h>

static Ref<Image> _webp_mem_loader_func(const uint8_t *p_png, int p_size) {
	Ref<Image> img;
	img.instantiate();
	Error err = WebPCommon::webp_load_image_from_buffer(img.ptr(), p_png, p_size);
	ERR_FAIL_COND_V(err, Ref<Image>());
	return img;
}

Error ImageLoaderWebP::load_image(Ref<Image> p_image, Ref<FileAccess> f, uint32_t p_flags, float p_scale) {
	Vector<uint8_t> src_image;
	uint64_t src_image_len = f->get_length();
	ERR_FAIL_COND_V(src_image_len == 0, ERR_FILE_CORRUPT);
	src_image.resize(src_image_len);

	uint8_t *w = src_image.ptrw();

	f->get_buffer(&w[0], src_image_len);

	Error err = WebPCommon::webp_load_image_from_buffer(p_image.ptr(), w, src_image_len);

	return err;
}

void ImageLoaderWebP::get_recognized_extensions(List<String> *p_extensions) const {
	p_extensions->push_back("webp");
}

ImageLoaderWebP::ImageLoaderWebP() {
	Image::_webp_mem_loader_func = _webp_mem_loader_func;
	Image::webp_lossy_packer = WebPCommon::_webp_lossy_pack;
	Image::webp_lossless_packer = WebPCommon::_webp_lossless_pack;
	Image::webp_unpacker = WebPCommon::_webp_unpack;
}