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https://github.com/yuzu-emu/FasTC.git
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233 lines
6.0 KiB
C
Executable File
233 lines
6.0 KiB
C
Executable File
/*
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* targa.h
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*
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* Copyright (C) 2006 - 2009 by Joshua S. English.
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*
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* This software is the intellectual property of Joshua S. English. This
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* software is provided 'as-is', without any express or implied warranty. In no
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* event will the author be held liable for any damages arising from the use of
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* this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software in
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* a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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*
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* 2. Altered source version must be plainly marked as such, and must not be
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* misrepresented as being original software.
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*
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* 3. This notice may not be removed or altered from any source distribution.
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*
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*
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* Notes:
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*
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* A plugin to read targa (TGA) image files into an OpenGL-compatible RGBA
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* format, header file.
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*
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* Written by Joshua S. English.
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*
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*
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* The TARGA Specification:
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*
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* Position: Length: Description:
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* -------- ------ -----------
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* 0 1 length of the image ID
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* 1 1 type of color map included (if any)
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* 0 => no color map
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* 1 => has color map
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* 2 1 image type
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* 0 => no image data
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* 1 => color-mapped image
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* 2 => true-color image
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* 3 => black & white image
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* 9 => RLE color-mapped image
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* 10 => RLE true-color image
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* 11 => RLE black & white image
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* 3 2 index of the first color-map entry as an offest
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* into the color-map table
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* 5 2 color-map length (number of entries)
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* 7 1 color-map entry length - (number of bits per entry)
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* 8 2 x-origin of image
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* 10 2 y-origin of image
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* 12 2 image width in pixels
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* 14 2 image height in pixels
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* 16 1 pixel depth - the number of bits per pixel
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* 17 1 image descriptor
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* n var image id - only exists if non-zero
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* n var color-map data - only exists if non-zero
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* n var image data
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*/
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#if !defined(_TARGA_H)
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#define _TARGA_H
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// define targa public constants
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#define TARGA_COLOR_RED 1
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#define TARGA_COLOR_GREEN 2
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#define TARGA_COLOR_BLUE 3
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#define TARGA_COLOR_ALPHA 4
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// define targa public data types
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typedef struct _Targa {
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int width;
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int height;
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int imageLength;
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unsigned char *image;
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} Targa;
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#ifdef __cplusplus
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extern "C" {
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#endif
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// declare targa public functions
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/**
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* targa_init()
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*
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* Initilize the Targa structure for utilization.
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*
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* @param targa(in) The Targa struct to initialize.
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*
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* @return An integer where zero is pass, less than zero is failure.
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*/
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int targa_init(Targa *targa);
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/**
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* targa_free()
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*
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* Free the Targa structure.
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*
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* @param targa(in) The Targa struct to free.
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*
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* @return An integer where zero is pass, less than zero is failure.
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*/
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int targa_free(Targa *targa);
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/**
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* targa_getDimensions()
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*
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* Obtain the width and height in pixels of a loaded Targa image.
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*
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* @param targa(in) The Targa struct of a loaded image.
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*
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* @param width(out) The width in pixels of a loaded Targa image.
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*
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* @param height(out) The height in pixels of a loaded Targa image.
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*
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* @return An integer where zero is pass, less than zero is failure.
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*/
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int targa_getDimensions(Targa *targa, int *width, int *height);
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/**
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* targa_getImageLength()
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*
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* Obtain the length in bytes of the serialized RGBA image.
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*
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* @param targa(in) The Targa struct of a loaded image.
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*
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* @param imageLength(out) The length in bytes of the RGBA image.
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*
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* @return An integer where zero is pass, less than zero is failure.
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*/
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int targa_getImageLength(Targa *targa, int *imageLength);
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/**
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* targa_getRgbaTexture()
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*
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* Obtain the serialized RGBA texture and its' length from a Targa image.
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*
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* @param targa(in) The Targa struct of a loaded image.
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*
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* @param texture(out) The serialized RGBA image pointer.
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*
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* @param textureLength(out) The serialized RGBA image length in bytes.
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*
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* @return An integer where zero is pass, less than zero is failure.
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*/
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int targa_getRgbaTexture(Targa *targa, char **texture, int *textureLength);
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/**
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* targa_loadFromFile()
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*
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* Load a targa file and decode it into a 32-bit RGBA serialized image.
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*
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* @param targa(in) The Targa struct of an image to load.
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*
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* @param filename(in) The filename of the image to load.
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*
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* @return An integer where zero is pass, less than zero is failure.
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*/
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int targa_loadFromFile(Targa *targa, char *filename);
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/**
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* targa_loadFromData()
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*
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* Load the targa from an in-memory location and decode it into a 32-bit RGBA
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* serialize image.
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*
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* @param targa(in) The Targa struct an image to load.
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*
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* @param data(in) A pointer to an in-memory location containing a
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* Targa image.
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*
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* @param dataLength(in) The length of the Targa in-memory image.
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*
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* @return An integer where zero is pass, less than zero is failure.
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*/
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int targa_loadFromData(Targa *targa, const unsigned char *data, int dataLength);
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/**
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* targa_applyRgbaMask()
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*
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* Apply a red, green, blue or alpha-channel additive color-mask to a loaded
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* Targa image.
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*
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* @param targa(in) The Targa struct of a loaded image.
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*
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* @param colorType(in) The color channel to mask.
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*
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* @param value(in) The color code (0 - 255) to mask.
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*
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* @return An integer where zero is pass, less than zero is failure.
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*/
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int targa_applyRgbaMask(Targa *targa, int colorType, unsigned char value);
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/**
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* targa_setRgbaChannel()
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*
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* Apply a red, green, blue or alpha-channel additive color-channel
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* replacement to a loaded Targa image.
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*
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* @param targa(in) The Targa struct of a loaded image.
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*
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* @param colorType(in) The color channel to replace.
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*
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* @param value(in) The color code (0 - 255) to replace.
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*
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* @return An integer where zero is pass, less than zero is failure.
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*/
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int targa_setRgbaChannel(Targa *targa, int colorType, unsigned char value);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // _TARGA_H
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