image_loader_tga.h

/**************************************************************************/
/*  image_loader_tga.h                                                    */
/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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#pragma once

#include "core/io/image_loader.h"

#define TGA_IMAGE_DESCRIPTOR_ALPHA_MASK 0xf

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, Ref<FileAccess> f, BitField<ImageFormatLoader::LoaderFlags> p_flags, float p_scale);
	virtual void get_recognized_extensions(List<String> *p_extensions) const;
	ImageLoaderTGA();
};