code:
/*
  Simple DirectMedia Layer
  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>

  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.
*/

/**
 *  \file SDL_surface.h
 *
 *  Header file for ::SDL_Surface definition and management functions.
 */

#ifndef SDL_surface_h_
#define SDL_surface_h_

#include "SDL_stdinc.h"
#include "SDL_pixels.h"
#include "SDL_rect.h"
#include "SDL_blendmode.h"
#include "SDL_rwops.h"

#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
extern "C" {
#endif

/**
 *  \name Surface flags
 *
 *  These are the currently supported flags for the ::SDL_Surface.
 *
 *  \internal
 *  Used internally (read-only).
 */
/* @{ */
#define SDL_SWSURFACE       0           /**< Just here for compatibility */
#define SDL_PREALLOC        0x00000001  /**< Surface uses preallocated memory */
#define SDL_RLEACCEL        0x00000002  /**< Surface is RLE encoded */
#define SDL_DONTFREE        0x00000004  /**< Surface is referenced internally */
#define SDL_SIMD_ALIGNED    0x00000008  /**< Surface uses aligned memory */
/* @} *//* Surface flags */

/**
 *  Evaluates to true if the surface needs to be locked before access.
 */
#define SDL_MUSTLOCK(S) (((S)->flags & SDL_RLEACCEL) != 0)

/**
 * \brief A collection of pixels used in software blitting.
 *
 * \note  This structure should be treated as read-only, except for \c pixels,
 *        which, if not NULL, contains the raw pixel data for the surface.
 */
typedef struct SDL_Surface
{
    Uint32 flags;               /**< Read-only */
    SDL_PixelFormat *format;    /**< Read-only */
    int w, h;                   /**< Read-only */
    int pitch;                  /**< Read-only */
    void *pixels;               /**< Read-write */

    /** Application data associated with the surface */
    void *userdata;             /**< Read-write */

    /** information needed for surfaces requiring locks */
    int locked;                 /**< Read-only */

    /** list of BlitMap that hold a reference to this surface */
    void *list_blitmap;         /**< Private */

    /** clipping information */
    SDL_Rect clip_rect;         /**< Read-only */

    /** info for fast blit mapping to other surfaces */
    struct SDL_BlitMap *map;    /**< Private */

    /** Reference count -- used when freeing surface */
    int refcount;               /**< Read-mostly */
} SDL_Surface;

/**
 * \brief The type of function used for surface blitting functions.
 */
typedef int (SDLCALL *SDL_blit) (struct SDL_Surface * src, SDL_Rect * srcrect,
                                 struct SDL_Surface * dst, SDL_Rect * dstrect);

/**
 * \brief The formula used for converting between YUV and RGB
 */
typedef enum
{
    SDL_YUV_CONVERSION_JPEG,        /**< Full range JPEG */
    SDL_YUV_CONVERSION_BT601,       /**< BT.601 (the default) */
    SDL_YUV_CONVERSION_BT709,       /**< BT.709 */
    SDL_YUV_CONVERSION_AUTOMATIC    /**< BT.601 for SD content, BT.709 for HD content */
} SDL_YUV_CONVERSION_MODE;

/**
 * Allocate a new RGB surface.
 *
 * If `depth` is 4 or 8 bits, an empty palette is allocated for the surface.
 * If `depth` is greater than 8 bits, the pixel format is set using the
 * [RGBA]mask parameters.
 *
 * The [RGBA]mask parameters are the bitmasks used to extract that color from
 * a pixel. For instance, `Rmask` being 0xFF000000 means the red data is
 * stored in the most significant byte. Using zeros for the RGB masks sets a
 * default value, based on the depth. For example:
 *
 * ```c++
 * SDL_CreateRGBSurface(0,w,h,32,0,0,0,0);
 * ```
 *
 * However, using zero for the Amask results in an Amask of 0.
 *
 * By default surfaces with an alpha mask are set up for blending as with:
 *
 * ```c++
 * SDL_SetSurfaceBlendMode(surface, SDL_BLENDMODE_BLEND)
 * ```
 *
 * You can change this by calling SDL_SetSurfaceBlendMode() and selecting a
 * different `blendMode`.
 *
 * \param flags the flags are unused and should be set to 0
 * \param width the width of the surface
 * \param height the height of the surface
 * \param depth the depth of the surface in bits
 * \param Rmask the red mask for the pixels
 * \param Gmask the green mask for the pixels
 * \param Bmask the blue mask for the pixels
 * \param Amask the alpha mask for the pixels
 * \returns the new SDL_Surface structure that is created or NULL if it fails;
 *          call SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_CreateRGBSurfaceFrom
 * \sa SDL_CreateRGBSurfaceWithFormat
 * \sa SDL_FreeSurface
 */
extern DECLSPEC SDL_Surface *SDLCALL SDL_CreateRGBSurface
    (Uint32 flags, int width, int height, int depth,
     Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask);

/* !!! FIXME for 2.1: why does this ask for depth? Format provides that. */

/**
 * Allocate a new RGB surface with a specific pixel format.
 *
 * This function operates mostly like SDL_CreateRGBSurface(), except instead
 * of providing pixel color masks, you provide it with a predefined format
 * from SDL_PixelFormatEnum.
 *
 * \param flags the flags are unused and should be set to 0
 * \param width the width of the surface
 * \param height the height of the surface
 * \param depth the depth of the surface in bits
 * \param format the SDL_PixelFormatEnum for the new surface's pixel format.
 * \returns the new SDL_Surface structure that is created or NULL if it fails;
 *          call SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.5.
 *
 * \sa SDL_CreateRGBSurface
 * \sa SDL_CreateRGBSurfaceFrom
 * \sa SDL_FreeSurface
 */
extern DECLSPEC SDL_Surface *SDLCALL SDL_CreateRGBSurfaceWithFormat
    (Uint32 flags, int width, int height, int depth, Uint32 format);

/**
 * Allocate a new RGB surface with existing pixel data.
 *
 * This function operates mostly like SDL_CreateRGBSurface(), except it does
 * not allocate memory for the pixel data, instead the caller provides an
 * existing buffer of data for the surface to use.
 *
 * No copy is made of the pixel data. Pixel data is not managed automatically;
 * you must free the surface before you free the pixel data.
 *
 * \param pixels a pointer to existing pixel data
 * \param width the width of the surface
 * \param height the height of the surface
 * \param depth the depth of the surface in bits
 * \param pitch the pitch of the surface in bytes
 * \param Rmask the red mask for the pixels
 * \param Gmask the green mask for the pixels
 * \param Bmask the blue mask for the pixels
 * \param Amask the alpha mask for the pixels
 * \returns the new SDL_Surface structure that is created or NULL if it fails;
 *          call SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_CreateRGBSurface
 * \sa SDL_CreateRGBSurfaceWithFormat
 * \sa SDL_FreeSurface
 */
extern DECLSPEC SDL_Surface *SDLCALL SDL_CreateRGBSurfaceFrom(void *pixels,
                                                              int width,
                                                              int height,
                                                              int depth,
                                                              int pitch,
                                                              Uint32 Rmask,
                                                              Uint32 Gmask,
                                                              Uint32 Bmask,
                                                              Uint32 Amask);

/* !!! FIXME for 2.1: why does this ask for depth? Format provides that. */

/**
 * Allocate a new RGB surface with with a specific pixel format and existing
 * pixel data.
 *
 * This function operates mostly like SDL_CreateRGBSurfaceFrom(), except
 * instead of providing pixel color masks, you provide it with a predefined
 * format from SDL_PixelFormatEnum.
 *
 * No copy is made of the pixel data. Pixel data is not managed automatically;
 * you must free the surface before you free the pixel data.
 *
 * \param pixels a pointer to existing pixel data
 * \param width the width of the surface
 * \param height the height of the surface
 * \param depth the depth of the surface in bits
 * \param pitch the pitch of the surface in bytes
 * \param format the SDL_PixelFormatEnum for the new surface's pixel format.
 * \returns the new SDL_Surface structure that is created or NULL if it fails;
 *          call SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.5.
 *
 * \sa SDL_CreateRGBSurfaceFrom
 * \sa SDL_CreateRGBSurfaceWithFormat
 * \sa SDL_FreeSurface
 */
extern DECLSPEC SDL_Surface *SDLCALL SDL_CreateRGBSurfaceWithFormatFrom
    (void *pixels, int width, int height, int depth, int pitch, Uint32 format);

/**
 * Free an RGB surface.
 *
 * It is safe to pass NULL to this function.
 *
 * \param surface the SDL_Surface to free.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_CreateRGBSurface
 * \sa SDL_CreateRGBSurfaceFrom
 * \sa SDL_LoadBMP
 * \sa SDL_LoadBMP_RW
 */
extern DECLSPEC void SDLCALL SDL_FreeSurface(SDL_Surface * surface);

/**
 * Set the palette used by a surface.
 *
 * A single palette can be shared with many surfaces.
 *
 * \param surface the SDL_Surface structure to update
 * \param palette the SDL_Palette structure to use
 * \returns 0 on success or a negative error code on failure; call
 *          SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 */
extern DECLSPEC int SDLCALL SDL_SetSurfacePalette(SDL_Surface * surface,
                                                  SDL_Palette * palette);

/**
 * Set up a surface for directly accessing the pixels.
 *
 * Between calls to SDL_LockSurface() / SDL_UnlockSurface(), you can write to
 * and read from `surface->pixels`, using the pixel format stored in
 * `surface->format`. Once you are done accessing the surface, you should use
 * SDL_UnlockSurface() to release it.
 *
 * Not all surfaces require locking. If `SDL_MUSTLOCK(surface)` evaluates to
 * 0, then you can read and write to the surface at any time, and the pixel
 * format of the surface will not change.
 *
 * \param surface the SDL_Surface structure to be locked
 * \returns 0 on success or a negative error code on failure; call
 *          SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_MUSTLOCK
 * \sa SDL_UnlockSurface
 */
extern DECLSPEC int SDLCALL SDL_LockSurface(SDL_Surface * surface);

/**
 * Release a surface after directly accessing the pixels.
 *
 * \param surface the SDL_Surface structure to be unlocked
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_LockSurface
 */
extern DECLSPEC void SDLCALL SDL_UnlockSurface(SDL_Surface * surface);

/**
 * Load a BMP image from a seekable SDL data stream.
 *
 * The new surface should be freed with SDL_FreeSurface(). Not doing so will
 * result in a memory leak.
 *
 * src is an open SDL_RWops buffer, typically loaded with SDL_RWFromFile.
 * Alternitavely, you might also use the macro SDL_LoadBMP to load a bitmap
 * from a file, convert it to an SDL_Surface and then close the file.
 *
 * \param src the data stream for the surface
 * \param freesrc non-zero to close the stream after being read
 * \returns a pointer to a new SDL_Surface structure or NULL if there was an
 *          error; call SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_FreeSurface
 * \sa SDL_RWFromFile
 * \sa SDL_LoadBMP
 * \sa SDL_SaveBMP_RW
 */
extern DECLSPEC SDL_Surface *SDLCALL SDL_LoadBMP_RW(SDL_RWops * src,
                                                    int freesrc);

/**
 * Load a surface from a file.
 *
 * Convenience macro.
 */
#define SDL_LoadBMP(file)   SDL_LoadBMP_RW(SDL_RWFromFile(file, "rb"), 1)

/**
 * Save a surface to a seekable SDL data stream in BMP format.
 *
 * Surfaces with a 24-bit, 32-bit and paletted 8-bit format get saved in the
 * BMP directly. Other RGB formats with 8-bit or higher get converted to a
 * 24-bit surface or, if they have an alpha mask or a colorkey, to a 32-bit
 * surface before they are saved. YUV and paletted 1-bit and 4-bit formats are
 * not supported.
 *
 * \param surface the SDL_Surface structure containing the image to be saved
 * \param dst a data stream to save to
 * \param freedst non-zero to close the stream after being written
 * \returns 0 on success or a negative error code on failure; call
 *          SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_LoadBMP_RW
 * \sa SDL_SaveBMP
 */
extern DECLSPEC int SDLCALL SDL_SaveBMP_RW
    (SDL_Surface * surface, SDL_RWops * dst, int freedst);

/**
 *  Save a surface to a file.
 *
 *  Convenience macro.
 */
#define SDL_SaveBMP(surface, file) \
        SDL_SaveBMP_RW(surface, SDL_RWFromFile(file, "wb"), 1)

/**
 * Set the RLE acceleration hint for a surface.
 *
 * If RLE is enabled, color key and alpha blending blits are much faster, but
 * the surface must be locked before directly accessing the pixels.
 *
 * \param surface the SDL_Surface structure to optimize
 * \param flag 0 to disable, non-zero to enable RLE acceleration
 * \returns 0 on success or a negative error code on failure; call
 *          SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_BlitSurface
 * \sa SDL_LockSurface
 * \sa SDL_UnlockSurface
 */
extern DECLSPEC int SDLCALL SDL_SetSurfaceRLE(SDL_Surface * surface,
                                              int flag);

/**
 * Returns whether the surface is RLE enabled
 *
 * It is safe to pass a NULL `surface` here; it will return SDL_FALSE.
 *
 * \param surface the SDL_Surface structure to query
 * \returns SDL_TRUE if the surface is RLE enabled, SDL_FALSE otherwise.
 *
 * \since This function is available since SDL 2.0.14.
 *
 * \sa SDL_SetSurfaceRLE
 */
extern DECLSPEC SDL_bool SDLCALL SDL_HasSurfaceRLE(SDL_Surface * surface);

/**
 * Set the color key (transparent pixel) in a surface.
 *
 * The color key defines a pixel value that will be treated as transparent in
 * a blit. For example, one can use this to specify that cyan pixels should be
 * considered transparent, and therefore not rendered.
 *
 * It is a pixel of the format used by the surface, as generated by
 * SDL_MapRGB().
 *
 * RLE acceleration can substantially speed up blitting of images with large
 * horizontal runs of transparent pixels. See SDL_SetSurfaceRLE() for details.
 *
 * \param surface the SDL_Surface structure to update
 * \param flag SDL_TRUE to enable color key, SDL_FALSE to disable color key
 * \param key the transparent pixel
 * \returns 0 on success or a negative error code on failure; call
 *          SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_BlitSurface
 * \sa SDL_GetColorKey
 */
extern DECLSPEC int SDLCALL SDL_SetColorKey(SDL_Surface * surface,
                                            int flag, Uint32 key);

/**
 * Returns whether the surface has a color key
 *
 * It is safe to pass a NULL `surface` here; it will return SDL_FALSE.
 *
 * \param surface the SDL_Surface structure to query
 * \return SDL_TRUE if the surface has a color key, SDL_FALSE otherwise.
 *
 * \since This function is available since SDL 2.0.9.
 *
 * \sa SDL_SetColorKey
 * \sa SDL_GetColorKey
 */
extern DECLSPEC SDL_bool SDLCALL SDL_HasColorKey(SDL_Surface * surface);

/**
 * Get the color key (transparent pixel) for a surface.
 *
 * The color key is a pixel of the format used by the surface, as generated by
 * SDL_MapRGB().
 *
 * If the surface doesn't have color key enabled this function returns -1.
 *
 * \param surface the SDL_Surface structure to query
 * \param key a pointer filled in with the transparent pixel
 * \returns 0 on success or a negative error code on failure; call
 *          SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_BlitSurface
 * \sa SDL_SetColorKey
 */
extern DECLSPEC int SDLCALL SDL_GetColorKey(SDL_Surface * surface,
                                            Uint32 * key);

/**
 * Set an additional color value multiplied into blit operations.
 *
 * When this surface is blitted, during the blit operation each source color
 * channel is modulated by the appropriate color value according to the
 * following formula:
 *
 * `srcC = srcC * (color / 255)`
 *
 * \param surface the SDL_Surface structure to update
 * \param r the red color value multiplied into blit operations
 * \param g the green color value multiplied into blit operations
 * \param b the blue color value multiplied into blit operations
 * \returns 0 on success or a negative error code on failure; call
 *          SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_GetSurfaceColorMod
 * \sa SDL_SetSurfaceAlphaMod
 */
extern DECLSPEC int SDLCALL SDL_SetSurfaceColorMod(SDL_Surface * surface,
                                                   Uint8 r, Uint8 g, Uint8 b);

/**
 * Get the additional color value multiplied into blit operations.
 *
 * \param surface the SDL_Surface structure to query
 * \param r a pointer filled in with the current red color value
 * \param g a pointer filled in with the current green color value
 * \param b a pointer filled in with the current blue color value
 * \returns 0 on success or a negative error code on failure; call
 *          SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_GetSurfaceAlphaMod
 * \sa SDL_SetSurfaceColorMod
 */
extern DECLSPEC int SDLCALL SDL_GetSurfaceColorMod(SDL_Surface * surface,
                                                   Uint8 * r, Uint8 * g,
                                                   Uint8 * b);

/**
 * Set an additional alpha value used in blit operations.
 *
 * When this surface is blitted, during the blit operation the source alpha
 * value is modulated by this alpha value according to the following formula:
 *
 * `srcA = srcA * (alpha / 255)`
 *
 * \param surface the SDL_Surface structure to update
 * \param alpha the alpha value multiplied into blit operations
 * \returns 0 on success or a negative error code on failure; call
 *          SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_GetSurfaceAlphaMod
 * \sa SDL_SetSurfaceColorMod
 */
extern DECLSPEC int SDLCALL SDL_SetSurfaceAlphaMod(SDL_Surface * surface,
                                                   Uint8 alpha);

/**
 * Get the additional alpha value used in blit operations.
 *
 * \param surface the SDL_Surface structure to query
 * \param alpha a pointer filled in with the current alpha value
 * \returns 0 on success or a negative error code on failure; call
 *          SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_GetSurfaceColorMod
 * \sa SDL_SetSurfaceAlphaMod
 */
extern DECLSPEC int SDLCALL SDL_GetSurfaceAlphaMod(SDL_Surface * surface,
                                                   Uint8 * alpha);

/**
 * Set the blend mode used for blit operations.
 *
 * To copy a surface to another surface (or texture) without blending with the
 * existing data, the blendmode of the SOURCE surface should be set to
 * `SDL_BLENDMODE_NONE`.
 *
 * \param surface the SDL_Surface structure to update
 * \param blendMode the SDL_BlendMode to use for blit blending
 * \returns 0 on success or a negative error code on failure; call
 *          SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_GetSurfaceBlendMode
 */
extern DECLSPEC int SDLCALL SDL_SetSurfaceBlendMode(SDL_Surface * surface,
                                                    SDL_BlendMode blendMode);

/**
 * Get the blend mode used for blit operations.
 *
 * \param surface the SDL_Surface structure to query
 * \param blendMode a pointer filled in with the current SDL_BlendMode
 * \returns 0 on success or a negative error code on failure; call
 *          SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_SetSurfaceBlendMode
 */
extern DECLSPEC int SDLCALL SDL_GetSurfaceBlendMode(SDL_Surface * surface,
                                                    SDL_BlendMode *blendMode);

/**
 * Set the clipping rectangle for a surface.
 *
 * When `surface` is the destination of a blit, only the area within the clip
 * rectangle is drawn into.
 *
 * Note that blits are automatically clipped to the edges of the source and
 * destination surfaces.
 *
 * \param surface the SDL_Surface structure to be clipped
 * \param rect the SDL_Rect structure representing the clipping rectangle, or
 *             NULL to disable clipping
 * \returns SDL_TRUE if the rectangle intersects the surface, otherwise
 *          SDL_FALSE and blits will be completely clipped.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_BlitSurface
 * \sa SDL_GetClipRect
 */
extern DECLSPEC SDL_bool SDLCALL SDL_SetClipRect(SDL_Surface * surface,
                                                 const SDL_Rect * rect);

/**
 * Get the clipping rectangle for a surface.
 *
 * When `surface` is the destination of a blit, only the area within the clip
 * rectangle is drawn into.
 *
 * \param surface the SDL_Surface structure representing the surface to be
 *                clipped
 * \param rect an SDL_Rect structure filled in with the clipping rectangle for
 *             the surface
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_BlitSurface
 * \sa SDL_SetClipRect
 */
extern DECLSPEC void SDLCALL SDL_GetClipRect(SDL_Surface * surface,
                                             SDL_Rect * rect);

/*
 * Creates a new surface identical to the existing surface.
 *
 * The returned surface should be freed with SDL_FreeSurface().
 *
 * \param surface the surface to duplicate.
 * \returns a copy of the surface, or NULL on failure; call SDL_GetError() for
 *          more information.
 */
extern DECLSPEC SDL_Surface *SDLCALL SDL_DuplicateSurface(SDL_Surface * surface);

/**
 * Copy an existing surface to a new surface of the specified format.
 *
 * This function is used to optimize images for faster *repeat* blitting. This
 * is accomplished by converting the original and storing the result as a new
 * surface. The new, optimized surface can then be used as the source for
 * future blits, making them faster.
 *
 * \param src the existing SDL_Surface structure to convert
 * \param fmt the SDL_PixelFormat structure that the new surface is optimized
 *            for
 * \param flags the flags are unused and should be set to 0; this is a
 *              leftover from SDL 1.2's API
 * \returns the new SDL_Surface structure that is created or NULL if it fails;
 *          call SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_AllocFormat
 * \sa SDL_ConvertSurfaceFormat
 * \sa SDL_CreateRGBSurface
 */
extern DECLSPEC SDL_Surface *SDLCALL SDL_ConvertSurface
    (SDL_Surface * src, const SDL_PixelFormat * fmt, Uint32 flags);

/**
 * Copy an existing surface to a new surface of the specified format enum.
 *
 * This function operates just like SDL_ConvertSurface(), but accepts an
 * SDL_PixelFormatEnum value instead of an SDL_PixelFormat structure. As such,
 * it might be easier to call but it doesn't have access to palette
 * information for the destination surface, in case that would be important.
 *
 * \param src the existing SDL_Surface structure to convert
 * \param pixel_format the SDL_PixelFormatEnum that the new surface is
 *                     optimized for
 * \param flags the flags are unused and should be set to 0; this is a
 *              leftover from SDL 1.2's API
 * \returns the new SDL_Surface structure that is created or NULL if it fails;
 *          call SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_AllocFormat
 * \sa SDL_ConvertSurface
 * \sa SDL_CreateRGBSurface
 */
extern DECLSPEC SDL_Surface *SDLCALL SDL_ConvertSurfaceFormat
    (SDL_Surface * src, Uint32 pixel_format, Uint32 flags);

/**
 * Copy a block of pixels of one format to another format.
 *
 * \param width the width of the block to copy, in pixels
 * \param height the height of the block to copy, in pixels
 * \param src_format an SDL_PixelFormatEnum value of the `src` pixels format
 * \param src a pointer to the source pixels
 * \param src_pitch the pitch of the source pixels, in bytes
 * \param dst_format an SDL_PixelFormatEnum value of the `dst` pixels format
 * \param dst a pointer to be filled in with new pixel data
 * \param dst_pitch the pitch of the destination pixels, in bytes
 * \returns 0 on success or a negative error code on failure; call
 *          SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 */
extern DECLSPEC int SDLCALL SDL_ConvertPixels(int width, int height,
                                              Uint32 src_format,
                                              const void * src, int src_pitch,
                                              Uint32 dst_format,
                                              void * dst, int dst_pitch);

/**
 * Premultiply the alpha on a block of pixels.
 *
 * This is safe to use with src == dst, but not for other overlapping areas.
 *
 * This function is currently only implemented for SDL_PIXELFORMAT_ARGB8888.
 *
 * \param width the width of the block to convert, in pixels
 * \param height the height of the block to convert, in pixels
 * \param src_format an SDL_PixelFormatEnum value of the `src` pixels format
 * \param src a pointer to the source pixels
 * \param src_pitch the pitch of the source pixels, in bytes
 * \param dst_format an SDL_PixelFormatEnum value of the `dst` pixels format
 * \param dst a pointer to be filled in with premultiplied pixel data
 * \param dst_pitch the pitch of the destination pixels, in bytes
 * \returns 0 on success or a negative error code on failure; call
 *          SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.18.
 */
extern DECLSPEC int SDLCALL SDL_PremultiplyAlpha(int width, int height,
                                                 Uint32 src_format,
                                                 const void * src, int src_pitch,
                                                 Uint32 dst_format,
                                                 void * dst, int dst_pitch);

/**
 * Perform a fast fill of a rectangle with a specific color.
 *
 * `color` should be a pixel of the format used by the surface, and can be
 * generated by SDL_MapRGB() or SDL_MapRGBA(). If the color value contains an
 * alpha component then the destination is simply filled with that alpha
 * information, no blending takes place.
 *
 * If there is a clip rectangle set on the destination (set via
 * SDL_SetClipRect()), then this function will fill based on the intersection
 * of the clip rectangle and `rect`.
 *
 * \param dst the SDL_Surface structure that is the drawing target
 * \param rect the SDL_Rect structure representing the rectangle to fill, or
 *             NULL to fill the entire surface
 * \param color the color to fill with
 * \returns 0 on success or a negative error code on failure; call
 *          SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_FillRects
 */
extern DECLSPEC int SDLCALL SDL_FillRect
    (SDL_Surface * dst, const SDL_Rect * rect, Uint32 color);

/**
 * Perform a fast fill of a set of rectangles with a specific color.
 *
 * `color` should be a pixel of the format used by the surface, and can be
 * generated by SDL_MapRGB() or SDL_MapRGBA(). If the color value contains an
 * alpha component then the destination is simply filled with that alpha
 * information, no blending takes place.
 *
 * If there is a clip rectangle set on the destination (set via
 * SDL_SetClipRect()), then this function will fill based on the intersection
 * of the clip rectangle and `rect`.
 *
 * \param dst the SDL_Surface structure that is the drawing target
 * \param rects an array of SDL_Rects representing the rectangles to fill.
 * \param count the number of rectangles in the array
 * \param color the color to fill with
 * \returns 0 on success or a negative error code on failure; call
 *          SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_FillRect
 */
extern DECLSPEC int SDLCALL SDL_FillRects
    (SDL_Surface * dst, const SDL_Rect * rects, int count, Uint32 color);

/* !!! FIXME: merge this documentation with the wiki */
/**
 *  Performs a fast blit from the source surface to the destination surface.
 *
 *  This assumes that the source and destination rectangles are
 *  the same size.  If either \c srcrect or \c dstrect are NULL, the entire
 *  surface (\c src or \c dst) is copied.  The final blit rectangles are saved
 *  in \c srcrect and \c dstrect after all clipping is performed.
 *
 *  \returns 0 if the blit is successful, otherwise it returns -1.
 *
 *  The blit function should not be called on a locked surface.
 *
 *  The blit semantics for surfaces with and without blending and colorkey
 *  are defined as follows:
 *  \verbatim
    RGBA->RGB:
      Source surface blend mode set to SDL_BLENDMODE_BLEND:
        alpha-blend (using the source alpha-channel and per-surface alpha)
        SDL_SRCCOLORKEY ignored.
      Source surface blend mode set to SDL_BLENDMODE_NONE:
        copy RGB.
        if SDL_SRCCOLORKEY set, only copy the pixels matching the
        RGB values of the source color key, ignoring alpha in the
        comparison.

    RGB->RGBA:
      Source surface blend mode set to SDL_BLENDMODE_BLEND:
        alpha-blend (using the source per-surface alpha)
      Source surface blend mode set to SDL_BLENDMODE_NONE:
        copy RGB, set destination alpha to source per-surface alpha value.
      both:
        if SDL_SRCCOLORKEY set, only copy the pixels matching the
        source color key.

    RGBA->RGBA:
      Source surface blend mode set to SDL_BLENDMODE_BLEND:
        alpha-blend (using the source alpha-channel and per-surface alpha)
        SDL_SRCCOLORKEY ignored.
      Source surface blend mode set to SDL_BLENDMODE_NONE:
        copy all of RGBA to the destination.
        if SDL_SRCCOLORKEY set, only copy the pixels matching the
        RGB values of the source color key, ignoring alpha in the
        comparison.

    RGB->RGB:
      Source surface blend mode set to SDL_BLENDMODE_BLEND:
        alpha-blend (using the source per-surface alpha)
      Source surface blend mode set to SDL_BLENDMODE_NONE:
        copy RGB.
      both:
        if SDL_SRCCOLORKEY set, only copy the pixels matching the
        source color key.
    \endverbatim
 *
 *  You should call SDL_BlitSurface() unless you know exactly how SDL
 *  blitting works internally and how to use the other blit functions.
 */
#define SDL_BlitSurface SDL_UpperBlit

/**
 * Perform a fast blit from the source surface to the destination surface.
 *
 * SDL_UpperBlit() has been replaced by SDL_BlitSurface(), which is merely a
 * macro for this function with a less confusing name.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_BlitSurface
 */
extern DECLSPEC int SDLCALL SDL_UpperBlit
    (SDL_Surface * src, const SDL_Rect * srcrect,
     SDL_Surface * dst, SDL_Rect * dstrect);

/**
 * Perform low-level surface blitting only.
 *
 * This is a semi-private blit function and it performs low-level surface
 * blitting, assuming the input rectangles have already been clipped.
 *
 * Unless you know what you're doing, you should be using SDL_BlitSurface()
 * instead.
 *
 * \param src the SDL_Surface structure to be copied from
 * \param srcrect the SDL_Rect structure representing the rectangle to be
 *                copied, or NULL to copy the entire surface
 * \param dst the SDL_Surface structure that is the blit target
 * \param dstrect the SDL_Rect structure representing the rectangle that is
 *                copied into
 * \returns 0 on success or a negative error code on failure; call
 *          SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_BlitSurface
 */
extern DECLSPEC int SDLCALL SDL_LowerBlit
    (SDL_Surface * src, SDL_Rect * srcrect,
     SDL_Surface * dst, SDL_Rect * dstrect);

/**
 * Perform a fast, low quality, stretch blit between two surfaces of the same
 * format.
 *
 * Please use SDL_BlitScaled() instead.
 *
 * \since This function is available since SDL 2.0.0.
 */
extern DECLSPEC int SDLCALL SDL_SoftStretch(SDL_Surface * src,
                                            const SDL_Rect * srcrect,
                                            SDL_Surface * dst,
                                            const SDL_Rect * dstrect);

/**
 * Perform bilinear scaling between two surfaces of the same format, 32BPP.
 *
 * \since This function is available since SDL 2.0.16.
 */
extern DECLSPEC int SDLCALL SDL_SoftStretchLinear(SDL_Surface * src,
                                            const SDL_Rect * srcrect,
                                            SDL_Surface * dst,
                                            const SDL_Rect * dstrect);

#define SDL_BlitScaled SDL_UpperBlitScaled

/**
 * Perform a scaled surface copy to a destination surface.
 *
 * SDL_UpperBlitScaled() has been replaced by SDL_BlitScaled(), which is
 * merely a macro for this function with a less confusing name.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_BlitScaled
 */
extern DECLSPEC int SDLCALL SDL_UpperBlitScaled
    (SDL_Surface * src, const SDL_Rect * srcrect,
    SDL_Surface * dst, SDL_Rect * dstrect);

/**
 * Perform low-level surface scaled blitting only.
 *
 * This is a semi-private function and it performs low-level surface blitting,
 * assuming the input rectangles have already been clipped.
 *
 * \param src the SDL_Surface structure to be copied from
 * \param srcrect the SDL_Rect structure representing the rectangle to be
 *                copied
 * \param dst the SDL_Surface structure that is the blit target
 * \param dstrect the SDL_Rect structure representing the rectangle that is
 *                copied into
 * \returns 0 on success or a negative error code on failure; call
 *          SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_BlitScaled
 */
extern DECLSPEC int SDLCALL SDL_LowerBlitScaled
    (SDL_Surface * src, SDL_Rect * srcrect,
    SDL_Surface * dst, SDL_Rect * dstrect);

/**
 * Set the YUV conversion mode
 *
 * \since This function is available since SDL 2.0.8.
 */
extern DECLSPEC void SDLCALL SDL_SetYUVConversionMode(SDL_YUV_CONVERSION_MODE mode);

/**
 * Get the YUV conversion mode
 *
 * \since This function is available since SDL 2.0.8.
 */
extern DECLSPEC SDL_YUV_CONVERSION_MODE SDLCALL SDL_GetYUVConversionMode(void);

/**
 * Get the YUV conversion mode, returning the correct mode for the resolution
 * when the current conversion mode is SDL_YUV_CONVERSION_AUTOMATIC
 *
 * \since This function is available since SDL 2.0.8.
 */
extern DECLSPEC SDL_YUV_CONVERSION_MODE SDLCALL SDL_GetYUVConversionModeForResolution(int width, int height);

/* Ends C function definitions when using C++ */
#ifdef __cplusplus
}
#endif
#include "close_code.h"

#endif /* SDL_surface_h_ */

/* vi: set ts=4 sw=4 expandtab: */


code:
/*
  Simple DirectMedia Layer
  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>

  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.
*/

/**
 *  \file SDL_system.h
 *
 *  Include file for platform specific SDL API functions
 */

#ifndef SDL_system_h_
#define SDL_system_h_

#include "SDL_stdinc.h"
#include "SDL_keyboard.h"
#include "SDL_render.h"
#include "SDL_video.h"

#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
extern "C" {
#endif

/* Platform specific functions for Windows */
#ifdef __WIN32__

typedef void (SDLCALL * SDL_WindowsMessageHook)(void *userdata, void *hWnd, unsigned int message, Uint64 wParam, Sint64 lParam);

/**
 * Set a callback for every Windows message, run before TranslateMessage().
 *
 * \param callback The SDL_WindowsMessageHook function to call.
 * \param userdata a pointer to pass to every iteration of `callback`
 *
 * \since This function is available since SDL 2.0.4.
 */
extern DECLSPEC void SDLCALL SDL_SetWindowsMessageHook(SDL_WindowsMessageHook callback, void *userdata);

/**
 * Get the D3D9 adapter index that matches the specified display index.
 *
 * The returned adapter index can be passed to `IDirect3D9::CreateDevice` and
 * controls on which monitor a full screen application will appear.
 *
 * \param displayIndex the display index for which to get the D3D9 adapter
 *                     index
 * \returns the D3D9 adapter index on success or a negative error code on
 *          failure; call SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.1.
 */
extern DECLSPEC int SDLCALL SDL_Direct3D9GetAdapterIndex( int displayIndex );

typedef struct IDirect3DDevice9 IDirect3DDevice9;

/**
 * Get the D3D9 device associated with a renderer.
 *
 * Once you are done using the device, you should release it to avoid a
 * resource leak.
 *
 * \param renderer the renderer from which to get the associated D3D device
 * \returns the D3D9 device associated with given renderer or NULL if it is
 *          not a D3D9 renderer; call SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.1.
 */
extern DECLSPEC IDirect3DDevice9* SDLCALL SDL_RenderGetD3D9Device(SDL_Renderer * renderer);

typedef struct ID3D11Device ID3D11Device;

/**
 * Get the D3D11 device associated with a renderer.
 *
 * Once you are done using the device, you should release it to avoid a
 * resource leak.
 *
 * \param renderer the renderer from which to get the associated D3D11 device
 * \returns the D3D11 device associated with given renderer or NULL if it is
 *          not a D3D11 renderer; call SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.16.
 */
extern DECLSPEC ID3D11Device* SDLCALL SDL_RenderGetD3D11Device(SDL_Renderer * renderer);

/**
 * Get the DXGI Adapter and Output indices for the specified display index.
 *
 * The DXGI Adapter and Output indices can be passed to `EnumAdapters` and
 * `EnumOutputs` respectively to get the objects required to create a DX10 or
 * DX11 device and swap chain.
 *
 * Before SDL 2.0.4 this function did not return a value. Since SDL 2.0.4 it
 * returns an SDL_bool.
 *
 * \param displayIndex the display index for which to get both indices
 * \param adapterIndex a pointer to be filled in with the adapter index
 * \param outputIndex a pointer to be filled in with the output index
 * \returns SDL_TRUE on success or SDL_FALSE on failure; call SDL_GetError()
 *          for more information.
 *
 * \since This function is available since SDL 2.0.2.
 */
extern DECLSPEC SDL_bool SDLCALL SDL_DXGIGetOutputInfo( int displayIndex, int *adapterIndex, int *outputIndex );

#endif /* __WIN32__ */

/* Platform specific functions for Linux */
#ifdef __LINUX__

/**
 * Sets the UNIX nice value for a thread.
 *
 * This uses setpriority() if possible, and RealtimeKit if available.
 *
 * \param threadID the Unix thread ID to change priority of.
 * \param priority The new, Unix-specific, priority value.
 * \returns 0 on success, or -1 on error.
 *
 * \since This function is available since SDL 2.0.9.
 */
extern DECLSPEC int SDLCALL SDL_LinuxSetThreadPriority(Sint64 threadID, int priority);

/**
 * Sets the priority (not nice level) and scheduling policy for a thread.
 *
 * This uses setpriority() if possible, and RealtimeKit if available.
 *
 * \param threadID The Unix thread ID to change priority of.
 * \param sdlPriority The new SDL_ThreadPriority value.
 * \param schedPolicy The new scheduling policy (SCHED_FIFO, SCHED_RR,
 *                    SCHED_OTHER, etc...)
 * \returns 0 on success, or -1 on error.
 *
 * \since This function is available since SDL 2.0.18.
 */
extern DECLSPEC int SDLCALL SDL_LinuxSetThreadPriorityAndPolicy(Sint64 threadID, int sdlPriority, int schedPolicy);

#endif /* __LINUX__ */

/* Platform specific functions for iOS */
#ifdef __IPHONEOS__

#define SDL_iOSSetAnimationCallback(window, interval, callback, callbackParam) SDL_iPhoneSetAnimationCallback(window, interval, callback, callbackParam)

/**
 * Use this function to set the animation callback on Apple iOS.
 *
 * The function prototype for `callback` is:
 *
 * ```c
 * void callback(void* callbackParam);
 * ```
 *
 * Where its parameter, `callbackParam`, is what was passed as `callbackParam`
 * to SDL_iPhoneSetAnimationCallback().
 *
 * This function is only available on Apple iOS.
 *
 * For more information see:
 * [README-ios.md](https://hg.libsdl.org/SDL/file/default/docs/README-ios.md)
 *
 * This functions is also accessible using the macro
 * SDL_iOSSetAnimationCallback() since SDL 2.0.4.
 *
 * \param window the window for which the animation callback should be set
 * \param interval the number of frames after which **callback** will be
 *                 called
 * \param callback the function to call for every frame.
 * \param callbackParam a pointer that is passed to `callback`.
 * \returns 0 on success or a negative error code on failure; call
 *          SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_iPhoneSetEventPump
 */
extern DECLSPEC int SDLCALL SDL_iPhoneSetAnimationCallback(SDL_Window * window, int interval, void (*callback)(void*), void *callbackParam);

#define SDL_iOSSetEventPump(enabled) SDL_iPhoneSetEventPump(enabled)

/**
 * Use this function to enable or disable the SDL event pump on Apple iOS.
 *
 * This function is only available on Apple iOS.
 *
 * This functions is also accessible using the macro SDL_iOSSetEventPump()
 * since SDL 2.0.4.
 *
 * \param enabled SDL_TRUE to enable the event pump, SDL_FALSE to disable it
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_iPhoneSetAnimationCallback
 */
extern DECLSPEC void SDLCALL SDL_iPhoneSetEventPump(SDL_bool enabled);

#endif /* __IPHONEOS__ */

/* Platform specific functions for Android */
#ifdef __ANDROID__

/**
 * Get the Android Java Native Interface Environment of the current thread.
 *
 * This is the JNIEnv one needs to access the Java virtual machine from native
 * code, and is needed for many Android APIs to be usable from C.
 *
 * The prototype of the function in SDL's code actually declare a void* return
 * type, even if the implementation returns a pointer to a JNIEnv. The
 * rationale being that the SDL headers can avoid including jni.h.
 *
 * \returns a pointer to Java native interface object (JNIEnv) to which the
 *          current thread is attached, or 0 on error.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_AndroidGetActivity
 */
extern DECLSPEC void * SDLCALL SDL_AndroidGetJNIEnv(void);

/**
 * Retrieve the Java instance of the Android activity class.
 *
 * The prototype of the function in SDL's code actually declares a void*
 * return type, even if the implementation returns a jobject. The rationale
 * being that the SDL headers can avoid including jni.h.
 *
 * The jobject returned by the function is a local reference and must be
 * released by the caller. See the PushLocalFrame() and PopLocalFrame() or
 * DeleteLocalRef() functions of the Java native interface:
 *
 * https://docs.oracle.com/javase/1.5.0/docs/guide/jni/spec/functions.html
 *
 * \returns the jobject representing the instance of the Activity class of the
 *          Android application, or NULL on error.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_AndroidGetJNIEnv
 */
extern DECLSPEC void * SDLCALL SDL_AndroidGetActivity(void);

/**
 * Query Android API level of the current device.
 *
 * - API level 31: Android 12
 * - API level 30: Android 11
 * - API level 29: Android 10
 * - API level 28: Android 9
 * - API level 27: Android 8.1
 * - API level 26: Android 8.0
 * - API level 25: Android 7.1
 * - API level 24: Android 7.0
 * - API level 23: Android 6.0
 * - API level 22: Android 5.1
 * - API level 21: Android 5.0
 * - API level 20: Android 4.4W
 * - API level 19: Android 4.4
 * - API level 18: Android 4.3
 * - API level 17: Android 4.2
 * - API level 16: Android 4.1
 * - API level 15: Android 4.0.3
 * - API level 14: Android 4.0
 * - API level 13: Android 3.2
 * - API level 12: Android 3.1
 * - API level 11: Android 3.0
 * - API level 10: Android 2.3.3
 *
 * \returns the Android API level.
 *
 * \since This function is available since SDL 2.0.12.
 */
extern DECLSPEC int SDLCALL SDL_GetAndroidSDKVersion(void);

/**
 * Query if the application is running on Android TV.
 *
 * \returns SDL_TRUE if this is Android TV, SDL_FALSE otherwise.
 *
 * \since This function is available since SDL 2.0.8.
 */
extern DECLSPEC SDL_bool SDLCALL SDL_IsAndroidTV(void);

/**
 * Query if the application is running on a Chromebook.
 *
 * \returns SDL_TRUE if this is a Chromebook, SDL_FALSE otherwise.
 *
 * \since This function is available since SDL 2.0.9.
 */
extern DECLSPEC SDL_bool SDLCALL SDL_IsChromebook(void);

/**
 * Query if the application is running on a Samsung DeX docking station.
 *
 * \returns SDL_TRUE if this is a DeX docking station, SDL_FALSE otherwise.
 *
 * \since This function is available since SDL 2.0.9.
 */
extern DECLSPEC SDL_bool SDLCALL SDL_IsDeXMode(void);

/**
 * Trigger the Android system back button behavior.
 *
 * \since This function is available since SDL 2.0.9.
 */
extern DECLSPEC void SDLCALL SDL_AndroidBackButton(void);

/**
   See the official Android developer guide for more information:
   http://developer.android.com/guide/topics/data/data-storage.html
*/
#define SDL_ANDROID_EXTERNAL_STORAGE_READ   0x01
#define SDL_ANDROID_EXTERNAL_STORAGE_WRITE  0x02

/**
 * Get the path used for internal storage for this application.
 *
 * This path is unique to your application and cannot be written to by other
 * applications.
 *
 * Your internal storage path is typically:
 * `/data/data/your.app.package/files`.
 *
 * \returns the path used for internal storage or NULL on failure; call
 *          SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_AndroidGetExternalStorageState
 */
extern DECLSPEC const char * SDLCALL SDL_AndroidGetInternalStoragePath(void);

/**
 * Get the current state of external storage.
 *
 * The current state of external storage, a bitmask of these values:
 * `SDL_ANDROID_EXTERNAL_STORAGE_READ`, `SDL_ANDROID_EXTERNAL_STORAGE_WRITE`.
 *
 * If external storage is currently unavailable, this will return 0.
 *
 * \returns the current state of external storage on success or 0 on failure;
 *          call SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_AndroidGetExternalStoragePath
 */
extern DECLSPEC int SDLCALL SDL_AndroidGetExternalStorageState(void);

/**
 * Get the path used for external storage for this application.
 *
 * This path is unique to your application, but is public and can be written
 * to by other applications.
 *
 * Your external storage path is typically:
 * `/storage/sdcard0/Android/data/your.app.package/files`.
 *
 * \returns the path used for external storage for this application on success
 *          or NULL on failure; call SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 *
 * \sa SDL_AndroidGetExternalStorageState
 */
extern DECLSPEC const char * SDLCALL SDL_AndroidGetExternalStoragePath(void);

/**
 * Request permissions at runtime.
 *
 * This blocks the calling thread until the permission is granted or denied.
 *
 * \param permission The permission to request.
 * \returns SDL_TRUE if the permission was granted, SDL_FALSE otherwise.
 *
 * \since This function is available since SDL 2.0.14.
 */
extern DECLSPEC SDL_bool SDLCALL SDL_AndroidRequestPermission(const char *permission);

/**
 * Shows an Android toast notification.
 *
 * Toasts are a sort of lightweight notification that are unique to Android.
 *
 * https://developer.android.com/guide/topics/ui/notifiers/toasts
 *
 * Shows toast in UI thread.
 *
 * For the `gravity` parameter, choose a value from here, or -1 if you don't
 * have a preference:
 *
 * https://developer.android.com/reference/android/view/Gravity
 *
 * \param message text message to be shown
 * \param duration 0=short, 1=long
 * \param gravity where the notification should appear on the screen.
 * \param xoffset set this parameter only when gravity >=0
 * \param yoffset set this parameter only when gravity >=0
 * \returns 0 if success, -1 if any error occurs.
 *
 * \since This function is available since SDL 2.0.16.
 */
extern DECLSPEC int SDLCALL SDL_AndroidShowToast(const char* message, int duration, int gravity, int xoffset, int yoffset);

/**
 * Send a user command to SDLActivity.
 *
 * Override "boolean onUnhandledMessage(Message msg)" to handle the message.
 *
 * \param command user command that must be greater or equal to 0x8000
 * \param param user parameter
 *
 * \since This function is available since SDL 2.0.22.
 */
extern DECLSPEC int SDLCALL SDL_AndroidSendMessage(Uint32 command, int param);

#endif /* __ANDROID__ */

/* Platform specific functions for WinRT */
#ifdef __WINRT__

/**
 *  \brief WinRT / Windows Phone path types
 */
typedef enum
{
    /** \brief The installed app's root directory.
        Files here are likely to be read-only. */
    SDL_WINRT_PATH_INSTALLED_LOCATION,

    /** \brief The app's local data store.  Files may be written here */
    SDL_WINRT_PATH_LOCAL_FOLDER,

    /** \brief The app's roaming data store.  Unsupported on Windows Phone.
        Files written here may be copied to other machines via a network
        connection.
    */
    SDL_WINRT_PATH_ROAMING_FOLDER,

    /** \brief The app's temporary data store.  Unsupported on Windows Phone.
        Files written here may be deleted at any time. */
    SDL_WINRT_PATH_TEMP_FOLDER
} SDL_WinRT_Path;

/**
 *  \brief WinRT Device Family
 */
typedef enum
{
    /** \brief Unknown family  */
    SDL_WINRT_DEVICEFAMILY_UNKNOWN,

    /** \brief Desktop family*/
    SDL_WINRT_DEVICEFAMILY_DESKTOP,

    /** \brief Mobile family (for example smartphone) */
    SDL_WINRT_DEVICEFAMILY_MOBILE,

    /** \brief XBox family */
    SDL_WINRT_DEVICEFAMILY_XBOX,
} SDL_WinRT_DeviceFamily;

/**
 * Retrieve a WinRT defined path on the local file system.
 *
 * Not all paths are available on all versions of Windows. This is especially
 * true on Windows Phone. Check the documentation for the given SDL_WinRT_Path
 * for more information on which path types are supported where.
 *
 * Documentation on most app-specific path types on WinRT can be found on
 * MSDN, at the URL:
 *
 * https://msdn.microsoft.com/en-us/library/windows/apps/hh464917.aspx
 *
 * \param pathType the type of path to retrieve, one of SDL_WinRT_Path
 * \returns a UCS-2 string (16-bit, wide-char) containing the path, or NULL if
 *          the path is not available for any reason; call SDL_GetError() for
 *          more information.
 *
 * \since This function is available since SDL 2.0.3.
 *
 * \sa SDL_WinRTGetFSPathUTF8
 */
extern DECLSPEC const wchar_t * SDLCALL SDL_WinRTGetFSPathUNICODE(SDL_WinRT_Path pathType);

/**
 * Retrieve a WinRT defined path on the local file system.
 *
 * Not all paths are available on all versions of Windows. This is especially
 * true on Windows Phone. Check the documentation for the given SDL_WinRT_Path
 * for more information on which path types are supported where.
 *
 * Documentation on most app-specific path types on WinRT can be found on
 * MSDN, at the URL:
 *
 * https://msdn.microsoft.com/en-us/library/windows/apps/hh464917.aspx
 *
 * \param pathType the type of path to retrieve, one of SDL_WinRT_Path
 * \returns a UTF-8 string (8-bit, multi-byte) containing the path, or NULL if
 *          the path is not available for any reason; call SDL_GetError() for
 *          more information.
 *
 * \since This function is available since SDL 2.0.3.
 *
 * \sa SDL_WinRTGetFSPathUNICODE
 */
extern DECLSPEC const char * SDLCALL SDL_WinRTGetFSPathUTF8(SDL_WinRT_Path pathType);

/**
 * Detects the device family of WinRT plattform at runtime.
 *
 * \returns a value from the SDL_WinRT_DeviceFamily enum.
 *
 * \since This function is available since SDL 2.0.8.
 */
extern DECLSPEC SDL_WinRT_DeviceFamily SDLCALL SDL_WinRTGetDeviceFamily();

#endif /* __WINRT__ */

/**
 * Query if the current device is a tablet.
 *
 * If SDL can't determine this, it will return SDL_FALSE.
 *
 * \returns SDL_TRUE if the device is a tablet, SDL_FALSE otherwise.
 *
 * \since This function is available since SDL 2.0.9.
 */
extern DECLSPEC SDL_bool SDLCALL SDL_IsTablet(void);

/* Functions used by iOS application delegates to notify SDL about state changes */
extern DECLSPEC void SDLCALL SDL_OnApplicationWillTerminate(void);
extern DECLSPEC void SDLCALL SDL_OnApplicationDidReceiveMemoryWarning(void);
extern DECLSPEC void SDLCALL SDL_OnApplicationWillResignActive(void);
extern DECLSPEC void SDLCALL SDL_OnApplicationDidEnterBackground(void);
extern DECLSPEC void SDLCALL SDL_OnApplicationWillEnterForeground(void);
extern DECLSPEC void SDLCALL SDL_OnApplicationDidBecomeActive(void);
#ifdef __IPHONEOS__
extern DECLSPEC void SDLCALL SDL_OnApplicationDidChangeStatusBarOrientation(void);
#endif

/* Ends C function definitions when using C++ */
#ifdef __cplusplus
}
#endif
#include "close_code.h"

#endif /* SDL_system_h_ */

/* vi: set ts=4 sw=4 expandtab: */

repo_name: orochi/nblood

license: mit


code:
/*
  Simple DirectMedia Layer
  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>

  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.
*/

/**
 *  \file SDL_syswm.h
 *
 *  Include file for SDL custom system window manager hooks.
 */

#ifndef SDL_syswm_h_
#define SDL_syswm_h_

#include "SDL_stdinc.h"
#include "SDL_error.h"
#include "SDL_video.h"
#include "SDL_version.h"

/**
 *  \brief SDL_syswm.h
 *
 *  Your application has access to a special type of event ::SDL_SYSWMEVENT,
 *  which contains window-manager specific information and arrives whenever
 *  an unhandled window event occurs.  This event is ignored by default, but
 *  you can enable it with SDL_EventState().
 */
struct SDL_SysWMinfo;

#if !defined(SDL_PROTOTYPES_ONLY)

#if defined(SDL_VIDEO_DRIVER_WINDOWS)
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
#ifndef NOMINMAX   /* don't define min() and max(). */
#define NOMINMAX
#endif
#include <windows.h>
#endif

#if defined(SDL_VIDEO_DRIVER_WINRT)
#include <Inspectable.h>
#endif

/* This is the structure for custom window manager events */
#if defined(SDL_VIDEO_DRIVER_X11)
#if defined(__APPLE__) && defined(__MACH__)
/* conflicts with Quickdraw.h */
#define Cursor X11Cursor
#endif

#include <X11/Xlib.h>
#include <X11/Xatom.h>

#if defined(__APPLE__) && defined(__MACH__)
/* matches the re-define above */
#undef Cursor
#endif

#endif /* defined(SDL_VIDEO_DRIVER_X11) */

#if defined(SDL_VIDEO_DRIVER_DIRECTFB)
#include <directfb.h>
#endif

#if defined(SDL_VIDEO_DRIVER_COCOA)
#ifdef __OBJC__
@class NSWindow;
#else
typedef struct _NSWindow NSWindow;
#endif
#endif

#if defined(SDL_VIDEO_DRIVER_UIKIT)
#ifdef __OBJC__
#include <UIKit/UIKit.h>
#else
typedef struct _UIWindow UIWindow;
typedef struct _UIViewController UIViewController;
#endif
typedef Uint32 GLuint;
#endif

#if defined(SDL_VIDEO_VULKAN) || defined(SDL_VIDEO_METAL)
#define SDL_METALVIEW_TAG 255
#endif

#if defined(SDL_VIDEO_DRIVER_ANDROID)
typedef struct ANativeWindow ANativeWindow;
typedef void *EGLSurface;
#endif

#if defined(SDL_VIDEO_DRIVER_VIVANTE)
#include "SDL_egl.h"
#endif

#if defined(SDL_VIDEO_DRIVER_OS2)
#define INCL_WIN
#include <os2.h>
#endif
#endif /* SDL_PROTOTYPES_ONLY */

#if defined(SDL_VIDEO_DRIVER_KMSDRM)
struct gbm_device;
#endif

#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
extern "C" {
#endif

#if !defined(SDL_PROTOTYPES_ONLY)
/**
 *  These are the various supported windowing subsystems
 */
typedef enum
{
    SDL_SYSWM_UNKNOWN,
    SDL_SYSWM_WINDOWS,
    SDL_SYSWM_X11,
    SDL_SYSWM_DIRECTFB,
    SDL_SYSWM_COCOA,
    SDL_SYSWM_UIKIT,
    SDL_SYSWM_WAYLAND,
    SDL_SYSWM_MIR,  /* no longer available, left for API/ABI compatibility. Remove in 2.1! */
    SDL_SYSWM_WINRT,
    SDL_SYSWM_ANDROID,
    SDL_SYSWM_VIVANTE,
    SDL_SYSWM_OS2,
    SDL_SYSWM_HAIKU,
    SDL_SYSWM_KMSDRM,
    SDL_SYSWM_RISCOS
} SDL_SYSWM_TYPE;

/**
 *  The custom event structure.
 */
struct SDL_SysWMmsg
{
    SDL_version version;
    SDL_SYSWM_TYPE subsystem;
    union
    {
#if defined(SDL_VIDEO_DRIVER_WINDOWS)
        struct {
            HWND hwnd;                  /**< The window for the message */
            UINT msg;                   /**< The type of message */
            WPARAM wParam;              /**< WORD message parameter */
            LPARAM lParam;              /**< LONG message parameter */
        } win;
#endif
#if defined(SDL_VIDEO_DRIVER_X11)
        struct {
            XEvent event;
        } x11;
#endif
#if defined(SDL_VIDEO_DRIVER_DIRECTFB)
        struct {
            DFBEvent event;
        } dfb;
#endif
#if defined(SDL_VIDEO_DRIVER_COCOA)
        struct
        {
            /* Latest version of Xcode clang complains about empty structs in C v. C++:
                 error: empty struct has size 0 in C, size 1 in C++
             */
            int dummy;
            /* No Cocoa window events yet */
        } cocoa;
#endif
#if defined(SDL_VIDEO_DRIVER_UIKIT)
        struct
        {
            int dummy;
            /* No UIKit window events yet */
        } uikit;
#endif
#if defined(SDL_VIDEO_DRIVER_VIVANTE)
        struct
        {
            int dummy;
            /* No Vivante window events yet */
        } vivante;
#endif
#if defined(SDL_VIDEO_DRIVER_OS2)
        struct
        {
            BOOL fFrame;                /**< TRUE if hwnd is a frame window */
            HWND hwnd;                  /**< The window receiving the message */
            ULONG msg;                  /**< The message identifier */
            MPARAM mp1;                 /**< The first first message parameter */
            MPARAM mp2;                 /**< The second first message parameter */
        } os2;
#endif
        /* Can't have an empty union */
        int dummy;
    } msg;
};

/**
 *  The custom window manager information structure.
 *
 *  When this structure is returned, it holds information about which
 *  low level system it is using, and will be one of SDL_SYSWM_TYPE.
 */
struct SDL_SysWMinfo
{
    SDL_version version;
    SDL_SYSWM_TYPE subsystem;
    union
    {
#if defined(SDL_VIDEO_DRIVER_WINDOWS)
        struct
        {
            HWND window;                /**< The window handle */
            HDC hdc;                    /**< The window device context */
            HINSTANCE hinstance;        /**< The instance handle */
        } win;
#endif
#if defined(SDL_VIDEO_DRIVER_WINRT)
        struct
        {
            IInspectable * window;      /**< The WinRT CoreWindow */
        } winrt;
#endif
#if defined(SDL_VIDEO_DRIVER_X11)
        struct
        {
            Display *display;           /**< The X11 display */
            Window window;              /**< The X11 window */
        } x11;
#endif
#if defined(SDL_VIDEO_DRIVER_DIRECTFB)
        struct
        {
            IDirectFB *dfb;             /**< The directfb main interface */
            IDirectFBWindow *window;    /**< The directfb window handle */
            IDirectFBSurface *surface;  /**< The directfb client surface */
        } dfb;
#endif
#if defined(SDL_VIDEO_DRIVER_COCOA)
        struct
        {
#if defined(__OBJC__) && defined(__has_feature)
        #if __has_feature(objc_arc)
            NSWindow __unsafe_unretained *window; /**< The Cocoa window */
        #else
            NSWindow *window;                     /**< The Cocoa window */
        #endif
#else
            NSWindow *window;                     /**< The Cocoa window */
#endif
        } cocoa;
#endif
#if defined(SDL_VIDEO_DRIVER_UIKIT)
        struct
        {
#if defined(__OBJC__) && defined(__has_feature)
        #if __has_feature(objc_arc)
            UIWindow __unsafe_unretained *window; /**< The UIKit window */
        #else
            UIWindow *window;                     /**< The UIKit window */
        #endif
#else
            UIWindow *window;                     /**< The UIKit window */
#endif
            GLuint framebuffer; /**< The GL view's Framebuffer Object. It must be bound when rendering to the screen using GL. */
            GLuint colorbuffer; /**< The GL view's color Renderbuffer Object. It must be bound when SDL_GL_SwapWindow is called. */
            GLuint resolveFramebuffer; /**< The Framebuffer Object which holds the resolve color Renderbuffer, when MSAA is used. */
        } uikit;
#endif
#if defined(SDL_VIDEO_DRIVER_WAYLAND)
        struct
        {
            struct wl_display *display;             /**< Wayland display */
            struct wl_surface *surface;             /**< Wayland surface */
            void *shell_surface;                    /**< DEPRECATED Wayland shell_surface (window manager handle) */
            struct wl_egl_window *egl_window;       /**< Wayland EGL window (native window) */
            struct xdg_surface *xdg_surface;        /**< Wayland xdg surface (window manager handle) */
            struct xdg_toplevel *xdg_toplevel;      /**< Wayland xdg toplevel role */
            struct xdg_popup *xdg_popup;            /**< Wayland xdg popup role */
            struct xdg_positioner *xdg_positioner;  /**< Wayland xdg positioner, for popup */
        } wl;
#endif
#if defined(SDL_VIDEO_DRIVER_MIR)  /* no longer available, left for API/ABI compatibility. Remove in 2.1! */
        struct
        {
            void *connection;  /**< Mir display server connection */
            void *surface;  /**< Mir surface */
        } mir;
#endif

#if defined(SDL_VIDEO_DRIVER_ANDROID)
        struct
        {
            ANativeWindow *window;
            EGLSurface surface;
        } android;
#endif

#if defined(SDL_VIDEO_DRIVER_OS2)
        struct
        {
            HWND hwnd;                  /**< The window handle */
            HWND hwndFrame;             /**< The frame window handle */
        } os2;
#endif

#if defined(SDL_VIDEO_DRIVER_VIVANTE)
        struct
        {
            EGLNativeDisplayType display;
            EGLNativeWindowType window;
        } vivante;
#endif

#if defined(SDL_VIDEO_DRIVER_KMSDRM)
        struct
        {
            int dev_index;               /**< Device index (ex: the X in /dev/dri/cardX) */
            int drm_fd;                  /**< DRM FD (unavailable on Vulkan windows) */
            struct gbm_device *gbm_dev;  /**< GBM device (unavailable on Vulkan windows) */
        } kmsdrm;
#endif

        /* Make sure this union is always 64 bytes (8 64-bit pointers). */
        /* Be careful not to overflow this if you add a new target! */
        Uint8 dummy[64];
    } info;
};

#endif /* SDL_PROTOTYPES_ONLY */

typedef struct SDL_SysWMinfo SDL_SysWMinfo;

/**
 * Get driver-specific information about a window.
 *
 * You must include SDL_syswm.h for the declaration of SDL_SysWMinfo.
 *
 * The caller must initialize the `info` structure's version by using
 * `SDL_VERSION(&info.version)`, and then this function will fill in the rest
 * of the structure with information about the given window.
 *
 * \param window the window about which information is being requested
 * \param info an SDL_SysWMinfo structure filled in with window information
 * \returns SDL_TRUE if the function is implemented and the `version` member
 *          of the `info` struct is valid, or SDL_FALSE if the information
 *          could not be retrieved; call SDL_GetError() for more information.
 *
 * \since This function is available since SDL 2.0.0.
 */
extern DECLSPEC SDL_bool SDLCALL SDL_GetWindowWMInfo(SDL_Window * window,
                                                     SDL_SysWMinfo * info);

/* Ends C function definitions when using C++ */
#ifdef __cplusplus
}
#endif
#include "close_code.h"

#endif /* SDL_syswm_h_ */

/* vi: set ts=4 sw=4 expandtab: */


code:
/*
  Simple DirectMedia Layer
  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>

  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.
*/

/**
 *  \file SDL_test.h
 *
 *  Include file for SDL test framework.
 *
 *  This code is a part of the SDL2_test library, not the main SDL library.
 */

#ifndef SDL_test_h_
#define SDL_test_h_

#include "SDL.h"
#include "SDL_test_assert.h"
#include "SDL_test_common.h"
#include "SDL_test_compare.h"
#include "SDL_test_crc32.h"
#include "SDL_test_font.h"
#include "SDL_test_fuzzer.h"
#include "SDL_test_harness.h"
#include "SDL_test_images.h"
#include "SDL_test_log.h"
#include "SDL_test_md5.h"
#include "SDL_test_memory.h"
#include "SDL_test_random.h"

#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
extern "C" {
#endif

/* Global definitions */

/*
 * Note: Maximum size of SDLTest log message is less than SDL's limit
 * to ensure we can fit additional information such as the timestamp.
 */
#define SDLTEST_MAX_LOGMESSAGE_LENGTH   3584

/* Ends C function definitions when using C++ */
#ifdef __cplusplus
}
#endif
#include "close_code.h"

#endif /* SDL_test_h_ */

/* vi: set ts=4 sw=4 expandtab: */


code:
/*
  Simple DirectMedia Layer
  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>

  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.
*/

/**
 *  \file SDL_test_assert.h
 *
 *  Include file for SDL test framework.
 *
 *  This code is a part of the SDL2_test library, not the main SDL library.
 */

/*
 *
 * Assert API for test code and test cases
 *
 */

#ifndef SDL_test_assert_h_
#define SDL_test_assert_h_

#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
extern "C" {
#endif

/**
 * \brief Fails the assert.
 */
#define ASSERT_FAIL     0

/**
 * \brief Passes the assert.
 */
#define ASSERT_PASS     1

/**
 * \brief Assert that logs and break execution flow on failures.
 *
 * \param assertCondition Evaluated condition or variable to assert; fail (==0) or pass (!=0).
 * \param assertDescription Message to log with the assert describing it.
 */
void SDLTest_Assert(int assertCondition, SDL_PRINTF_FORMAT_STRING const char *assertDescription, ...) SDL_PRINTF_VARARG_FUNC(2);

/**
 * \brief Assert for test cases that logs but does not break execution flow on failures. Updates assertion counters.
 *
 * \param assertCondition Evaluated condition or variable to assert; fail (==0) or pass (!=0).
 * \param assertDescription Message to log with the assert describing it.
 *
 * \returns the assertCondition so it can be used to externally to break execution flow if desired.
 */
int SDLTest_AssertCheck(int assertCondition, SDL_PRINTF_FORMAT_STRING const char *assertDescription, ...) SDL_PRINTF_VARARG_FUNC(2);

/**
 * \brief Explicitly pass without checking an assertion condition. Updates assertion counter.
 *
 * \param assertDescription Message to log with the assert describing it.
 */
void SDLTest_AssertPass(SDL_PRINTF_FORMAT_STRING const char *assertDescription, ...) SDL_PRINTF_VARARG_FUNC(1);

/**
 * \brief Resets the assert summary counters to zero.
 */
void SDLTest_ResetAssertSummary(void);

/**
 * \brief Logs summary of all assertions (total, pass, fail) since last reset as INFO or ERROR.
 */
void SDLTest_LogAssertSummary(void);

/**
 * \brief Converts the current assert summary state to a test result.
 *
 * \returns TEST_RESULT_PASSED, TEST_RESULT_FAILED, or TEST_RESULT_NO_ASSERT
 */
int SDLTest_AssertSummaryToTestResult(void);

#ifdef __cplusplus
}
#endif
#include "close_code.h"

#endif /* SDL_test_assert_h_ */

/* vi: set ts=4 sw=4 expandtab: */


code:
/*
  Simple DirectMedia Layer
  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>

  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.
*/

/**
 *  \file SDL_test_common.h
 *
 *  Include file for SDL test framework.
 *
 *  This code is a part of the SDL2_test library, not the main SDL library.
 */

/* Ported from original test\common.h file. */

#ifndef SDL_test_common_h_
#define SDL_test_common_h_

#include "SDL.h"

#if defined(__PSP__)
#define DEFAULT_WINDOW_WIDTH  480
#define DEFAULT_WINDOW_HEIGHT 272
#elif defined(__VITA__)
#define DEFAULT_WINDOW_WIDTH  960
#define DEFAULT_WINDOW_HEIGHT 544
#else
#define DEFAULT_WINDOW_WIDTH  640
#define DEFAULT_WINDOW_HEIGHT 480
#endif

#define VERBOSE_VIDEO   0x00000001
#define VERBOSE_MODES   0x00000002
#define VERBOSE_RENDER  0x00000004
#define VERBOSE_EVENT   0x00000008
#define VERBOSE_AUDIO   0x00000010

typedef struct
{
    /* SDL init flags */
    char **argv;
    Uint32 flags;
    Uint32 verbose;

    /* Video info */
    const char *videodriver;
    int display;
    const char *window_title;
    const char *window_icon;
    Uint32 window_flags;
    SDL_bool flash_on_focus_loss;
    int window_x;
    int window_y;
    int window_w;
    int window_h;
    int window_minW;
    int window_minH;
    int window_maxW;
    int window_maxH;
    int logical_w;
    int logical_h;
    float scale;
    int depth;
    int refresh_rate;
    int num_windows;
    SDL_Window **windows;

    /* Renderer info */
    const char *renderdriver;
    Uint32 render_flags;
    SDL_bool skip_renderer;
    SDL_Renderer **renderers;
    SDL_Texture **targets;

    /* Audio info */
    const char *audiodriver;
    SDL_AudioSpec audiospec;

    /* GL settings */
    int gl_red_size;
    int gl_green_size;
    int gl_blue_size;
    int gl_alpha_size;
    int gl_buffer_size;
    int gl_depth_size;
    int gl_stencil_size;
    int gl_double_buffer;
    int gl_accum_red_size;
    int gl_accum_green_size;
    int gl_accum_blue_size;
    int gl_accum_alpha_size;
    int gl_stereo;
    int gl_multisamplebuffers;
    int gl_multisamplesamples;
    int gl_retained_backing;
    int gl_accelerated;
    int gl_major_version;
    int gl_minor_version;
    int gl_debug;
    int gl_profile_mask;

    /* Additional fields added in 2.0.18 */
    SDL_Rect confine;

} SDLTest_CommonState;

#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
extern "C" {
#endif

/* Function prototypes */

/**
 * \brief Parse command line parameters and create common state.
 *
 * \param argv Array of command line parameters
 * \param flags Flags indicating which subsystem to initialize (i.e. SDL_INIT_VIDEO | SDL_INIT_AUDIO)
 *
 * \returns a newly allocated common state object.
 */
SDLTest_CommonState *SDLTest_CommonCreateState(char **argv, Uint32 flags);

/**
 * \brief Process one common argument.
 *
 * \param state The common state describing the test window to create.
 * \param index The index of the argument to process in argv[].
 *
 * \returns the number of arguments processed (i.e. 1 for --fullscreen, 2 for --video [videodriver], or -1 on error.
 */
int SDLTest_CommonArg(SDLTest_CommonState * state, int index);

/**
 * \brief Logs command line usage info.
 *
 * This logs the appropriate command line options for the subsystems in use
 *  plus other common options, and then any application-specific options.
 *  This uses the SDL_Log() function and splits up output to be friendly to
 *  80-character-wide terminals.
 *
 * \param state The common state describing the test window for the app.
 * \param argv0 argv[0], as passed to main/SDL_main.
 * \param options an array of strings for application specific options. The last element of the array should be NULL.
 */
void SDLTest_CommonLogUsage(SDLTest_CommonState * state, const char *argv0, const char **options);

/**
 * \brief Returns common usage information
 *
 * You should (probably) be using SDLTest_CommonLogUsage() instead, but this
 *  function remains for binary compatibility. Strings returned from this
 *  function are valid until SDLTest_CommonQuit() is called, in which case
 *  those strings' memory is freed and can no longer be used.
 *
 * \param state The common state describing the test window to create.
 * \returns a string with usage information
 */
const char *SDLTest_CommonUsage(SDLTest_CommonState * state);

/**
 * \brief Open test window.
 *
 * \param state The common state describing the test window to create.
 *
 * \returns SDL_TRUE if initialization succeeded, false otherwise
 */
SDL_bool SDLTest_CommonInit(SDLTest_CommonState * state);

/**
 * \brief Easy argument handling when test app doesn't need any custom args.
 *
 * \param state The common state describing the test window to create.
 * \param argc argc, as supplied to SDL_main
 * \param argv argv, as supplied to SDL_main
 *
 * \returns SDL_FALSE if app should quit, true otherwise.
 */
SDL_bool SDLTest_CommonDefaultArgs(SDLTest_CommonState * state, const int argc, char **argv);

/**
 * \brief Common event handler for test windows.
 *
 * \param state The common state used to create test window.
 * \param event The event to handle.
 * \param done Flag indicating we are done.
 *
 */
void SDLTest_CommonEvent(SDLTest_CommonState * state, SDL_Event * event, int *done);

/**
 * \brief Close test window.
 *
 * \param state The common state used to create test window.
 *
 */
void SDLTest_CommonQuit(SDLTest_CommonState * state);

/**
 * \brief Draws various window information (position, size, etc.) to the renderer.
 *
 * \param renderer The renderer to draw to.
 * \param window The window whose information should be displayed.
 * \param usedHeight Returns the height used, so the caller can draw more below.
 *
 */
void SDLTest_CommonDrawWindowInfo(SDL_Renderer * renderer, SDL_Window * window, int * usedHeight);

/* Ends C function definitions when using C++ */
#ifdef __cplusplus
}
#endif
#include "close_code.h"

#endif /* SDL_test_common_h_ */

/* vi: set ts=4 sw=4 expandtab: */


code:
/*
  Simple DirectMedia Layer
  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>

  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.
*/

/**
 *  \file SDL_test_compare.h
 *
 *  Include file for SDL test framework.
 *
 *  This code is a part of the SDL2_test library, not the main SDL library.
 */

/*

 Defines comparison functions (i.e. for surfaces).

*/

#ifndef SDL_test_compare_h_
#define SDL_test_compare_h_

#include "SDL.h"

#include "SDL_test_images.h"

#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
extern "C" {
#endif

/**
 * \brief Compares a surface and with reference image data for equality
 *
 * \param surface Surface used in comparison
 * \param referenceSurface Test Surface used in comparison
 * \param allowable_error Allowable difference (=sum of squared difference for each RGB component) in blending accuracy.
 *
 * \returns 0 if comparison succeeded, >0 (=number of pixels for which the comparison failed) if comparison failed, -1 if any of the surfaces were NULL, -2 if the surface sizes differ.
 */
int SDLTest_CompareSurfaces(SDL_Surface *surface, SDL_Surface *referenceSurface, int allowable_error);

/* Ends C function definitions when using C++ */
#ifdef __cplusplus
}
#endif
#include "close_code.h"

#endif /* SDL_test_compare_h_ */

/* vi: set ts=4 sw=4 expandtab: */


code:
/*
  Simple DirectMedia Layer
  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>

  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.
*/

/**
 *  \file SDL_test_crc32.h
 *
 *  Include file for SDL test framework.
 *
 *  This code is a part of the SDL2_test library, not the main SDL library.
 */

/*

 Implements CRC32 calculations (default output is Perl String::CRC32 compatible).

*/

#ifndef SDL_test_crc32_h_
#define SDL_test_crc32_h_

#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
extern "C" {
#endif

/* ------------ Definitions --------- */

/* Definition shared by all CRC routines */

#ifndef CrcUint32
 #define CrcUint32  unsigned int
#endif
#ifndef CrcUint8
 #define CrcUint8   unsigned char
#endif

#ifdef ORIGINAL_METHOD
 #define CRC32_POLY 0x04c11db7   /* AUTODIN II, Ethernet, & FDDI */
#else
 #define CRC32_POLY 0xEDB88320   /* Perl String::CRC32 compatible */
#endif

/**
 * Data structure for CRC32 (checksum) computation
 */
  typedef struct {
    CrcUint32    crc32_table[256]; /* CRC table */
  } SDLTest_Crc32Context;

/* ---------- Function Prototypes ------------- */

/**
 * \brief Initialize the CRC context
 *
 * Note: The function initializes the crc table required for all crc calculations.
 *
 * \param crcContext        pointer to context variable
 *
 * \returns 0 for OK, -1 on error
 *
 */
 int SDLTest_Crc32Init(SDLTest_Crc32Context * crcContext);

/**
 * \brief calculate a crc32 from a data block
 *
 * \param crcContext         pointer to context variable
 * \param inBuf              input buffer to checksum
 * \param inLen              length of input buffer
 * \param crc32              pointer to Uint32 to store the final CRC into
 *
 * \returns 0 for OK, -1 on error
 *
 */
int SDLTest_Crc32Calc(SDLTest_Crc32Context * crcContext, CrcUint8 *inBuf, CrcUint32 inLen, CrcUint32 *crc32);

/* Same routine broken down into three steps */
int SDLTest_Crc32CalcStart(SDLTest_Crc32Context * crcContext, CrcUint32 *crc32);
int SDLTest_Crc32CalcEnd(SDLTest_Crc32Context * crcContext, CrcUint32 *crc32);
int SDLTest_Crc32CalcBuffer(SDLTest_Crc32Context * crcContext, CrcUint8 *inBuf, CrcUint32 inLen, CrcUint32 *crc32);

/**
 * \brief clean up CRC context
 *
 * \param crcContext        pointer to context variable
 *
 * \returns 0 for OK, -1 on error
 *
*/

int SDLTest_Crc32Done(SDLTest_Crc32Context * crcContext);

/* Ends C function definitions when using C++ */
#ifdef __cplusplus
}
#endif
#include "close_code.h"

#endif /* SDL_test_crc32_h_ */

/* vi: set ts=4 sw=4 expandtab: */


code:
/*
  Simple DirectMedia Layer
  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>

  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.
*/

/**
 *  \file SDL_test_font.h
 *
 *  Include file for SDL test framework.
 *
 *  This code is a part of the SDL2_test library, not the main SDL library.
 */

#ifndef SDL_test_font_h_
#define SDL_test_font_h_

#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
extern "C" {
#endif

/* Function prototypes */

#define FONT_CHARACTER_SIZE  8

/**
 *  \brief Draw a string in the currently set font.
 *
 *  \param renderer The renderer to draw on.
 *  \param x The X coordinate of the upper left corner of the character.
 *  \param y The Y coordinate of the upper left corner of the character.
 *  \param c The character to draw.
 *
 *  \returns 0 on success, -1 on failure.
 */
int SDLTest_DrawCharacter(SDL_Renderer *renderer, int x, int y, char c);

/**
 *  \brief Draw a string in the currently set font.
 *
 *  \param renderer The renderer to draw on.
 *  \param x The X coordinate of the upper left corner of the string.
 *  \param y The Y coordinate of the upper left corner of the string.
 *  \param s The string to draw.
 *
 *  \returns 0 on success, -1 on failure.
 */
int SDLTest_DrawString(SDL_Renderer *renderer, int x, int y, const char *s);

/**
 *  \brief Cleanup textures used by font drawing functions.
 */
void SDLTest_CleanupTextDrawing(void);

/* Ends C function definitions when using C++ */
#ifdef __cplusplus
}
#endif
#include "close_code.h"

#endif /* SDL_test_font_h_ */

/* vi: set ts=4 sw=4 expandtab: */