virtualx-engine/modules/tga/image_loader_tga.h

/*************************************************************************/
/*  image_loader_tga.h                                                   */
/*************************************************************************/
/*                       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.                */
/*************************************************************************/

#ifndef IMAGE_LOADER_TGA_H
#define IMAGE_LOADER_TGA_H

#include "core/io/image_loader.h"

/**
	@author SaracenOne
*/
class ImageLoaderTGA : public ImageFormatLoader {
	enum tga_type_e {
		TGA_TYPE_NO_DATA = 0,
		TGA_TYPE_INDEXED = 1,
		TGA_TYPE_RGB = 2,
		TGA_TYPE_MONOCHROME = 3,
		TGA_TYPE_RLE_INDEXED = 9,
		TGA_TYPE_RLE_RGB = 10,
		TGA_TYPE_RLE_MONOCHROME = 11
	};

	enum tga_origin_e {
		TGA_ORIGIN_BOTTOM_LEFT = 0x00,
		TGA_ORIGIN_BOTTOM_RIGHT = 0x01,
		TGA_ORIGIN_TOP_LEFT = 0x02,
		TGA_ORIGIN_TOP_RIGHT = 0x03,
		TGA_ORIGIN_SHIFT = 0x04,
		TGA_ORIGIN_MASK = 0x30
	};

	struct tga_header_s {
		uint8_t id_length = 0;
		uint8_t color_map_type = 0;
		tga_type_e image_type;

		uint16_t first_color_entry = 0;
		uint16_t color_map_length = 0;
		uint8_t color_map_depth = 0;

		uint16_t x_origin = 0;
		uint16_t y_origin = 0;
		uint16_t image_width = 0;
		uint16_t image_height = 0;
		uint8_t pixel_depth = 0;
		uint8_t image_descriptor = 0;
	};
	static Error decode_tga_rle(const uint8_t *p_compressed_buffer, size_t p_pixel_size, uint8_t *p_uncompressed_buffer, size_t p_output_size, size_t p_input_size);
	static Error convert_to_image(Ref<Image> p_image, const uint8_t *p_buffer, const tga_header_s &p_header, const uint8_t *p_palette, const bool p_is_monochrome, size_t p_input_size);

public:
	virtual Error load_image(Ref<Image> p_image, FileAccess *f, bool p_force_linear, float p_scale);
	virtual void get_recognized_extensions(List<String> *p_extensions) const;
	ImageLoaderTGA();
};

#endif