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////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2013 Laurent Gomila (laurent.gom@gmail.com)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
//    you must not claim that you wrote the original software.
//    If you use this software in a product, an acknowledgment
//    in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
//    and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////

#ifndef SFML_IMAGE_H
#define SFML_IMAGE_H

////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/Graphics/Export.h>
#include <SFML/Graphics/Color.h>
#include <SFML/Graphics/Rect.h>
#include <SFML/Graphics/Types.h>
#include <SFML/System/InputStream.h>
#include <SFML/System/Vector2.h>
#include <stddef.h>


////////////////////////////////////////////////////////////
/// \brief Create an image
///
/// This image is filled with black pixels.
///
/// \param width  Width of the image
/// \param height Height of the image
///
/// \return A new sfImage object
///
////////////////////////////////////////////////////////////
CSFML_GRAPHICS_API sfImage* sfImage_create(unsigned int width, unsigned int height);

////////////////////////////////////////////////////////////
/// \brief Create an image and fill it with a unique color
///
/// \param width  Width of the image
/// \param height Height of the image
/// \param color  Fill color
///
/// \return A new sfImage object
///
////////////////////////////////////////////////////////////
CSFML_GRAPHICS_API sfImage* sfImage_createFromColor(unsigned int width, unsigned int height, sfColor color);

////////////////////////////////////////////////////////////
/// \brief Create an image from an array of pixels
///
/// The \a pixel array is assumed to contain 32-bits RGBA pixels,
/// and have the given \a width and \a height. If not, this is
/// an undefined behaviour.
/// If \a pixels is null, an empty image is created.
///
/// \param width  Width of the image
/// \param height Height of the image
/// \param pixels Array of pixels to copy to the image
///
/// \return A new sfImage object
///
////////////////////////////////////////////////////////////
CSFML_GRAPHICS_API sfImage* sfImage_createFromPixels(unsigned int width, unsigned int height, const sfUint8* pixels);

////////////////////////////////////////////////////////////
/// \brief Create an image from a file on disk
///
/// The supported image formats are bmp, png, tga, jpg, gif,
/// psd, hdr and pic. Some format options are not supported,
/// like progressive jpeg.
/// If this function fails, the image is left unchanged.
///
/// \param filename Path of the image file to load
///
/// \return A new sfImage object, or NULL if it failed
///
////////////////////////////////////////////////////////////
CSFML_GRAPHICS_API sfImage* sfImage_createFromFile(const char* filename);

////////////////////////////////////////////////////////////
/// \brief Create an image from a file in memory
///
/// The supported image formats are bmp, png, tga, jpg, gif,
/// psd, hdr and pic. Some format options are not supported,
/// like progressive jpeg.
/// If this function fails, the image is left unchanged.
///
/// \param data Pointer to the file data in memory
/// \param size Size of the data to load, in bytes
///
/// \return A new sfImage object, or NULL if it failed
///
////////////////////////////////////////////////////////////
CSFML_GRAPHICS_API sfImage* sfImage_createFromMemory(const void* data, size_t size);

////////////////////////////////////////////////////////////
/// \brief Create an image from a custom stream
///
/// The supported image formats are bmp, png, tga, jpg, gif,
/// psd, hdr and pic. Some format options are not supported,
/// like progressive jpeg.
/// If this function fails, the image is left unchanged.
///
/// \param stream Source stream to read from
///
/// \return A new sfImage object, or NULL if it failed
///
////////////////////////////////////////////////////////////
CSFML_GRAPHICS_API sfImage* sfImage_createFromStream(sfInputStream* stream);

////////////////////////////////////////////////////////////
/// \brief Copy an existing image
///
/// \param image Image to copy
///
/// \return Copied object
///
////////////////////////////////////////////////////////////
CSFML_GRAPHICS_API sfImage* sfImage_copy(const sfImage* image);

////////////////////////////////////////////////////////////
/// \brief Destroy an existing image
///
/// \param image Image to delete
///
////////////////////////////////////////////////////////////
CSFML_GRAPHICS_API void sfImage_destroy(sfImage* image);

////////////////////////////////////////////////////////////
/// \brief Save an image to a file on disk
///
/// The format of the image is automatically deduced from
/// the extension. The supported image formats are bmp, png,
/// tga and jpg. The destination file is overwritten
/// if it already exists. This function fails if the image is empty.
///
/// \param image    Image object
/// \param filename Path of the file to save
///
/// \return sfTrue if saving was successful
///
////////////////////////////////////////////////////////////
CSFML_GRAPHICS_API sfBool sfImage_saveToFile(const sfImage* image, const char* filename);

////////////////////////////////////////////////////////////
/// \brief Return the size of an image
///
/// \param image Image object
///
/// \return Size in pixels
///
////////////////////////////////////////////////////////////
CSFML_GRAPHICS_API sfVector2u sfImage_getSize(const sfImage* image);

////////////////////////////////////////////////////////////
/// \brief Create a transparency mask from a specified color-key
///
/// This function sets the alpha value of every pixel matching
/// the given color to \a alpha (0 by default), so that they
/// become transparent.
///
/// \param image Image object
/// \param color Color to make transparent
/// \param alpha Alpha value to assign to transparent pixels
///
////////////////////////////////////////////////////////////
CSFML_GRAPHICS_API void sfImage_createMaskFromColor(sfImage* image, sfColor color, sfUint8 alpha);

////////////////////////////////////////////////////////////
/// \brief Copy pixels from an image onto another
///
/// This function does a slow pixel copy and should not be
/// used intensively. It can be used to prepare a complex
/// static image from several others, but if you need this
/// kind of feature in real-time you'd better use sfRenderTexture.
///
/// If \a sourceRect is empty, the whole image is copied.
/// If \a applyAlpha is set to true, the transparency of
/// source pixels is applied. If it is false, the pixels are
/// copied unchanged with their alpha value.
///
/// \param image      Image object
/// \param source     Source image to copy
/// \param destX      X coordinate of the destination position
/// \param destY      Y coordinate of the destination position
/// \param sourceRect Sub-rectangle of the source image to copy
/// \param applyAlpha Should the copy take in account the source transparency?
///
////////////////////////////////////////////////////////////
CSFML_GRAPHICS_API void sfImage_copyImage(sfImage* image, const sfImage* source, unsigned int destX, unsigned int destY, sfIntRect sourceRect, sfBool applyAlpha);

////////////////////////////////////////////////////////////
/// \brief Change the color of a pixel in an image
///
/// This function doesn't check the validity of the pixel
/// coordinates, using out-of-range values will result in
/// an undefined behaviour.
///
/// \param image Image object
/// \param x     X coordinate of pixel to change
/// \param y     Y coordinate of pixel to change
/// \param color New color of the pixel
///
////////////////////////////////////////////////////////////
CSFML_GRAPHICS_API void sfImage_setPixel(sfImage* image, unsigned int x, unsigned int y, sfColor color);

////////////////////////////////////////////////////////////
/// \brief Get the color of a pixel in an image
///
/// This function doesn't check the validity of the pixel
/// coordinates, using out-of-range values will result in
/// an undefined behaviour.
///
/// \param image Image object
/// \param x     X coordinate of pixel to get
/// \param y     Y coordinate of pixel to get
///
/// \return Color of the pixel at coordinates (x, y)
///
////////////////////////////////////////////////////////////
CSFML_GRAPHICS_API sfColor sfImage_getPixel(const sfImage* image, unsigned int x, unsigned int y);

////////////////////////////////////////////////////////////
/// \brief Get a read-only pointer to the array of pixels of an image
///
/// The returned value points to an array of RGBA pixels made of
/// 8 bits integers components. The size of the array is
/// getWidth() * getHeight() * 4.
/// Warning: the returned pointer may become invalid if you
/// modify the image, so you should never store it for too long.
/// If the image is empty, a null pointer is returned.
///
/// \param image Image object
///
/// \return Read-only pointer to the array of pixels
///
////////////////////////////////////////////////////////////
CSFML_GRAPHICS_API const sfUint8* sfImage_getPixelsPtr(const sfImage* image);

////////////////////////////////////////////////////////////
/// \brief Flip an image horizontally (left <-> right)
///
/// \param image Image object
///
////////////////////////////////////////////////////////////
CSFML_GRAPHICS_API void sfImage_flipHorizontally(sfImage* image);

////////////////////////////////////////////////////////////
/// \brief Flip an image vertically (top <-> bottom)
///
/// \param image Image object
///
////////////////////////////////////////////////////////////
CSFML_GRAPHICS_API void sfImage_flipVertically(sfImage* image);


#endif // SFML_IMAGE_H