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Diffstat (limited to 'dependencies/include/SDL/SDL_surface.h')
| -rw-r--r-- | dependencies/include/SDL/SDL_surface.h | 997 |
1 files changed, 997 insertions, 0 deletions
diff --git a/dependencies/include/SDL/SDL_surface.h b/dependencies/include/SDL/SDL_surface.h new file mode 100644 index 0000000..838de65 --- /dev/null +++ b/dependencies/include/SDL/SDL_surface.h @@ -0,0 +1,997 @@ +/* + 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) + +typedef struct SDL_BlitMap SDL_BlitMap; /* this is an opaque type. */ + +/** + * \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 */ + 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: */ |