include/SDL_surface.h
author Sam Lantinga <slouken@libsdl.org>
Tue, 26 May 2015 06:27:46 -0700
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permissions -rw-r--r--
Updated the copyright year to 2015
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/*
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  Simple DirectMedia Layer
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  Copyright (C) 1997-2015 Sam Lantinga <slouken@libsdl.org>
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  This software is provided 'as-is', without any express or implied
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  warranty.  In no event will the authors be held liable for any damages
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  arising from the use of this software.
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  Permission is granted to anyone to use this software for any purpose,
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  including commercial applications, and to alter it and redistribute it
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  freely, subject to the following restrictions:
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  1. The origin of this software must not be misrepresented; you must not
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     claim that you wrote the original software. If you use this software
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     in a product, an acknowledgment in the product documentation would be
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     appreciated but is not required.
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  2. Altered source versions must be plainly marked as such, and must not be
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     misrepresented as being the original software.
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  3. This notice may not be removed or altered from any source distribution.
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*/
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/**
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 *  \file SDL_surface.h
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 *
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 *  Header file for ::SDL_Surface definition and management functions.
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 */
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#ifndef _SDL_surface_h
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#define _SDL_surface_h
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#include "SDL_stdinc.h"
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#include "SDL_pixels.h"
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#include "SDL_rect.h"
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#include "SDL_blendmode.h"
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#include "SDL_rwops.h"
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#include "begin_code.h"
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/* Set up for C function definitions, even when using C++ */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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 *  \name Surface flags
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 *
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 *  These are the currently supported flags for the ::SDL_Surface.
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 *
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 *  \internal
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 *  Used internally (read-only).
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 */
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/* @{ */
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#define SDL_SWSURFACE       0           /**< Just here for compatibility */
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#define SDL_PREALLOC        0x00000001  /**< Surface uses preallocated memory */
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#define SDL_RLEACCEL        0x00000002  /**< Surface is RLE encoded */
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#define SDL_DONTFREE        0x00000004  /**< Surface is referenced internally */
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/* @} *//* Surface flags */
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/**
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 *  Evaluates to true if the surface needs to be locked before access.
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 */
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#define SDL_MUSTLOCK(S) (((S)->flags & SDL_RLEACCEL) != 0)
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/**
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 * \brief A collection of pixels used in software blitting.
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 *
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 * \note  This structure should be treated as read-only, except for \c pixels,
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 *        which, if not NULL, contains the raw pixel data for the surface.
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 */
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typedef struct SDL_Surface
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{
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    Uint32 flags;               /**< Read-only */
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    SDL_PixelFormat *format;    /**< Read-only */
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    int w, h;                   /**< Read-only */
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    int pitch;                  /**< Read-only */
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    void *pixels;               /**< Read-write */
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    /** Application data associated with the surface */
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    void *userdata;             /**< Read-write */
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    /** information needed for surfaces requiring locks */
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    int locked;                 /**< Read-only */
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    void *lock_data;            /**< Read-only */
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    /** clipping information */
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    SDL_Rect clip_rect;         /**< Read-only */
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    /** info for fast blit mapping to other surfaces */
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    struct SDL_BlitMap *map;    /**< Private */
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    /** Reference count -- used when freeing surface */
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    int refcount;               /**< Read-mostly */
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} SDL_Surface;
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/**
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 * \brief The type of function used for surface blitting functions.
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 */
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typedef int (*SDL_blit) (struct SDL_Surface * src, SDL_Rect * srcrect,
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                         struct SDL_Surface * dst, SDL_Rect * dstrect);
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/**
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 *  Allocate and free an RGB surface.
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 *
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 *  If the depth is 4 or 8 bits, an empty palette is allocated for the surface.
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 *  If the depth is greater than 8 bits, the pixel format is set using the
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 *  flags '[RGB]mask'.
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 *
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 *  If the function runs out of memory, it will return NULL.
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 *
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 *  \param flags The \c flags are obsolete and should be set to 0.
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 *  \param width The width in pixels of the surface to create.
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 *  \param height The height in pixels of the surface to create.
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 *  \param depth The depth in bits of the surface to create.
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 *  \param Rmask The red mask of the surface to create.
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 *  \param Gmask The green mask of the surface to create.
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 *  \param Bmask The blue mask of the surface to create.
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 *  \param Amask The alpha mask of the surface to create.
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 */
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extern DECLSPEC SDL_Surface *SDLCALL SDL_CreateRGBSurface
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    (Uint32 flags, int width, int height, int depth,
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     Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask);
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extern DECLSPEC SDL_Surface *SDLCALL SDL_CreateRGBSurfaceFrom(void *pixels,
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                                                              int width,
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                                                              int height,
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                                                              int depth,
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                                                              int pitch,
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                                                              Uint32 Rmask,
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                                                              Uint32 Gmask,
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                                                              Uint32 Bmask,
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                                                              Uint32 Amask);
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extern DECLSPEC void SDLCALL SDL_FreeSurface(SDL_Surface * surface);
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/**
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 *  \brief Set the palette used by a surface.
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 *
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 *  \return 0, or -1 if the surface format doesn't use a palette.
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 *
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 *  \note A single palette can be shared with many surfaces.
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 */
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extern DECLSPEC int SDLCALL SDL_SetSurfacePalette(SDL_Surface * surface,
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                                                  SDL_Palette * palette);
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/**
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 *  \brief Sets up a surface for directly accessing the pixels.
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 *
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 *  Between calls to SDL_LockSurface() / SDL_UnlockSurface(), you can write
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 *  to and read from \c surface->pixels, using the pixel format stored in
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 *  \c surface->format.  Once you are done accessing the surface, you should
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 *  use SDL_UnlockSurface() to release it.
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 *
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 *  Not all surfaces require locking.  If SDL_MUSTLOCK(surface) evaluates
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 *  to 0, then you can read and write to the surface at any time, and the
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 *  pixel format of the surface will not change.
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 *
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 *  No operating system or library calls should be made between lock/unlock
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 *  pairs, as critical system locks may be held during this time.
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 *
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 *  SDL_LockSurface() returns 0, or -1 if the surface couldn't be locked.
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 *
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 *  \sa SDL_UnlockSurface()
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 */
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extern DECLSPEC int SDLCALL SDL_LockSurface(SDL_Surface * surface);
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/** \sa SDL_LockSurface() */
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extern DECLSPEC void SDLCALL SDL_UnlockSurface(SDL_Surface * surface);
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/**
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 *  Load a surface from a seekable SDL data stream (memory or file).
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 *
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 *  If \c freesrc is non-zero, the stream will be closed after being read.
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 *
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 *  The new surface should be freed with SDL_FreeSurface().
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 *
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 *  \return the new surface, or NULL if there was an error.
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 */
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extern DECLSPEC SDL_Surface *SDLCALL SDL_LoadBMP_RW(SDL_RWops * src,
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                                                    int freesrc);
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/**
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 *  Load a surface from a file.
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 *
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 *  Convenience macro.
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 */
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#define SDL_LoadBMP(file)   SDL_LoadBMP_RW(SDL_RWFromFile(file, "rb"), 1)
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/**
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 *  Save a surface to a seekable SDL data stream (memory or file).
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 *
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 *  If \c freedst is non-zero, the stream will be closed after being written.
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 *
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 *  \return 0 if successful or -1 if there was an error.
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 */
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extern DECLSPEC int SDLCALL SDL_SaveBMP_RW
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    (SDL_Surface * surface, SDL_RWops * dst, int freedst);
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/**
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 *  Save a surface to a file.
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 *
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 *  Convenience macro.
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 */
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#define SDL_SaveBMP(surface, file) \
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        SDL_SaveBMP_RW(surface, SDL_RWFromFile(file, "wb"), 1)
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/**
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 *  \brief Sets the RLE acceleration hint for a surface.
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 *
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 *  \return 0 on success, or -1 if the surface is not valid
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 *
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 *  \note If RLE is enabled, colorkey and alpha blending blits are much faster,
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 *        but the surface must be locked before directly accessing the pixels.
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 */
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extern DECLSPEC int SDLCALL SDL_SetSurfaceRLE(SDL_Surface * surface,
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                                              int flag);
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/**
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 *  \brief Sets the color key (transparent pixel) in a blittable surface.
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 *
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 *  \param surface The surface to update
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 *  \param flag Non-zero to enable colorkey and 0 to disable colorkey
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 *  \param key The transparent pixel in the native surface format
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 *
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 *  \return 0 on success, or -1 if the surface is not valid
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 *  You can pass SDL_RLEACCEL to enable RLE accelerated blits.
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 */
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extern DECLSPEC int SDLCALL SDL_SetColorKey(SDL_Surface * surface,
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                                            int flag, Uint32 key);
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/**
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 *  \brief Gets the color key (transparent pixel) in a blittable surface.
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 *
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 *  \param surface The surface to update
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 *  \param key A pointer filled in with the transparent pixel in the native
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 *             surface format
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 *
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 *  \return 0 on success, or -1 if the surface is not valid or colorkey is not
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 *          enabled.
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 */
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extern DECLSPEC int SDLCALL SDL_GetColorKey(SDL_Surface * surface,
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                                            Uint32 * key);
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/**
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 *  \brief Set an additional color value used in blit operations.
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 *
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 *  \param surface The surface to update.
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 *  \param r The red color value multiplied into blit operations.
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 *  \param g The green color value multiplied into blit operations.
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 *  \param b The blue color value multiplied into blit operations.
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 *
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 *  \return 0 on success, or -1 if the surface is not valid.
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 *
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 *  \sa SDL_GetSurfaceColorMod()
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 */
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extern DECLSPEC int SDLCALL SDL_SetSurfaceColorMod(SDL_Surface * surface,
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                                                   Uint8 r, Uint8 g, Uint8 b);
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/**
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 *  \brief Get the additional color value used in blit operations.
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 *
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 *  \param surface The surface to query.
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 *  \param r A pointer filled in with the current red color value.
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 *  \param g A pointer filled in with the current green color value.
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 *  \param b A pointer filled in with the current blue color value.
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 *
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 *  \return 0 on success, or -1 if the surface is not valid.
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 *
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 *  \sa SDL_SetSurfaceColorMod()
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 */
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extern DECLSPEC int SDLCALL SDL_GetSurfaceColorMod(SDL_Surface * surface,
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                                                   Uint8 * r, Uint8 * g,
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                                                   Uint8 * b);
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/**
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 *  \brief Set an additional alpha value used in blit operations.
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 *
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 *  \param surface The surface to update.
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 *  \param alpha The alpha value multiplied into blit operations.
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 *
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 *  \return 0 on success, or -1 if the surface is not valid.
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 *
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 *  \sa SDL_GetSurfaceAlphaMod()
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 */
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extern DECLSPEC int SDLCALL SDL_SetSurfaceAlphaMod(SDL_Surface * surface,
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                                                   Uint8 alpha);
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/**
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 *  \brief Get the additional alpha value used in blit operations.
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 *
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 *  \param surface The surface to query.
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 *  \param alpha A pointer filled in with the current alpha value.
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 *
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 *  \return 0 on success, or -1 if the surface is not valid.
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 *
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 *  \sa SDL_SetSurfaceAlphaMod()
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 */
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extern DECLSPEC int SDLCALL SDL_GetSurfaceAlphaMod(SDL_Surface * surface,
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                                                   Uint8 * alpha);
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/**
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 *  \brief Set the blend mode used for blit operations.
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 *
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 *  \param surface The surface to update.
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 *  \param blendMode ::SDL_BlendMode to use for blit blending.
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 *
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 *  \return 0 on success, or -1 if the parameters are not valid.
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 *
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 *  \sa SDL_GetSurfaceBlendMode()
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 */
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extern DECLSPEC int SDLCALL SDL_SetSurfaceBlendMode(SDL_Surface * surface,
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                                                    SDL_BlendMode blendMode);
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/**
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 *  \brief Get the blend mode used for blit operations.
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 *
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 *  \param surface   The surface to query.
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 *  \param blendMode A pointer filled in with the current blend mode.
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 *
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 *  \return 0 on success, or -1 if the surface is not valid.
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 *
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 *  \sa SDL_SetSurfaceBlendMode()
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 */
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extern DECLSPEC int SDLCALL SDL_GetSurfaceBlendMode(SDL_Surface * surface,
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                                                    SDL_BlendMode *blendMode);
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/**
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 *  Sets the clipping rectangle for the destination surface in a blit.
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 *
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 *  If the clip rectangle is NULL, clipping will be disabled.
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 *
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 *  If the clip rectangle doesn't intersect the surface, the function will
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 *  return SDL_FALSE and blits will be completely clipped.  Otherwise the
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 *  function returns SDL_TRUE and blits to the surface will be clipped to
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 *  the intersection of the surface area and the clipping rectangle.
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 *
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 *  Note that blits are automatically clipped to the edges of the source
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 *  and destination surfaces.
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 */
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extern DECLSPEC SDL_bool SDLCALL SDL_SetClipRect(SDL_Surface * surface,
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                                                 const SDL_Rect * rect);
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/**
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 *  Gets the clipping rectangle for the destination surface in a blit.
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 *
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 *  \c rect must be a pointer to a valid rectangle which will be filled
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 *  with the correct values.
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 */
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extern DECLSPEC void SDLCALL SDL_GetClipRect(SDL_Surface * surface,
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                                             SDL_Rect * rect);
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/**
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 *  Creates a new surface of the specified format, and then copies and maps
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 *  the given surface to it so the blit of the converted surface will be as
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 *  fast as possible.  If this function fails, it returns NULL.
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 *
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 *  The \c flags parameter is passed to SDL_CreateRGBSurface() and has those
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 *  semantics.  You can also pass ::SDL_RLEACCEL in the flags parameter and
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 *  SDL will try to RLE accelerate colorkey and alpha blits in the resulting
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 *  surface.
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 */
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extern DECLSPEC SDL_Surface *SDLCALL SDL_ConvertSurface
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    (SDL_Surface * src, const SDL_PixelFormat * fmt, Uint32 flags);
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extern DECLSPEC SDL_Surface *SDLCALL SDL_ConvertSurfaceFormat
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    (SDL_Surface * src, Uint32 pixel_format, Uint32 flags);
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/**
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 * \brief Copy a block of pixels of one format to another format
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 *
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 *  \return 0 on success, or -1 if there was an error
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 */
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extern DECLSPEC int SDLCALL SDL_ConvertPixels(int width, int height,
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                                              Uint32 src_format,
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                                              const void * src, int src_pitch,
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                                              Uint32 dst_format,
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                                              void * dst, int dst_pitch);
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/**
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 *  Performs a fast fill of the given rectangle with \c color.
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 *
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 *  If \c rect is NULL, the whole surface will be filled with \c color.
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 *
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 *  The color should be a pixel of the format used by the surface, and
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   381
 *  can be generated by the SDL_MapRGB() function.
7191
75360622e65f File style cleanup for the SDL 2.0 release
Sam Lantinga <slouken@libsdl.org>
parents: 7188
diff changeset
   382
 *
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   383
 *  \return 0 on success, or -1 on error.
2275
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   384
 */
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   385
extern DECLSPEC int SDLCALL SDL_FillRect
3536
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3434
diff changeset
   386
    (SDL_Surface * dst, const SDL_Rect * rect, Uint32 color);
0267b8b1595c Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents: 3434
diff changeset
   387
extern DECLSPEC int SDLCALL SDL_FillRects
5297
1800dc39b74c Changed the concept of a render clip rect to a render viewport.
Sam Lantinga <slouken@libsdl.org>
parents: 5296
diff changeset
   388
    (SDL_Surface * dst, const SDL_Rect * rects, int count, Uint32 color);
2275
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   389
3341
710139a1692d Fixed bug #826
Sam Lantinga <slouken@libsdl.org>
parents: 3103
diff changeset
   390
/**
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   391
 *  Performs a fast blit from the source surface to the destination surface.
7191
75360622e65f File style cleanup for the SDL 2.0 release
Sam Lantinga <slouken@libsdl.org>
parents: 7188
diff changeset
   392
 *
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   393
 *  This assumes that the source and destination rectangles are
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   394
 *  the same size.  If either \c srcrect or \c dstrect are NULL, the entire
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   395
 *  surface (\c src or \c dst) is copied.  The final blit rectangles are saved
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   396
 *  in \c srcrect and \c dstrect after all clipping is performed.
7191
75360622e65f File style cleanup for the SDL 2.0 release
Sam Lantinga <slouken@libsdl.org>
parents: 7188
diff changeset
   397
 *
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   398
 *  \return If the blit is successful, it returns 0, otherwise it returns -1.
2275
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   399
 *
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   400
 *  The blit function should not be called on a locked surface.
2275
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   401
 *
7502
6ff02ff3cf06 Updated blend semantics so blending uses the following formula:
Sam Lantinga <slouken@libsdl.org>
parents: 7278
diff changeset
   402
 *  The blit semantics for surfaces with and without blending and colorkey
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   403
 *  are defined as follows:
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   404
 *  \verbatim
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   405
    RGBA->RGB:
7502
6ff02ff3cf06 Updated blend semantics so blending uses the following formula:
Sam Lantinga <slouken@libsdl.org>
parents: 7278
diff changeset
   406
      Source surface blend mode set to SDL_BLENDMODE_BLEND:
6ff02ff3cf06 Updated blend semantics so blending uses the following formula:
Sam Lantinga <slouken@libsdl.org>
parents: 7278
diff changeset
   407
        alpha-blend (using the source alpha-channel and per-surface alpha)
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   408
        SDL_SRCCOLORKEY ignored.
7502
6ff02ff3cf06 Updated blend semantics so blending uses the following formula:
Sam Lantinga <slouken@libsdl.org>
parents: 7278
diff changeset
   409
      Source surface blend mode set to SDL_BLENDMODE_NONE:
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   410
        copy RGB.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   411
        if SDL_SRCCOLORKEY set, only copy the pixels matching the
7125
082c0c53ac16 Corrected spelling in header files.
Philipp Wiesemann <philipp.wiesemann@arcor.de>
parents: 6885
diff changeset
   412
        RGB values of the source color key, ignoring alpha in the
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   413
        comparison.
7191
75360622e65f File style cleanup for the SDL 2.0 release
Sam Lantinga <slouken@libsdl.org>
parents: 7188
diff changeset
   414
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   415
    RGB->RGBA:
7502
6ff02ff3cf06 Updated blend semantics so blending uses the following formula:
Sam Lantinga <slouken@libsdl.org>
parents: 7278
diff changeset
   416
      Source surface blend mode set to SDL_BLENDMODE_BLEND:
6ff02ff3cf06 Updated blend semantics so blending uses the following formula:
Sam Lantinga <slouken@libsdl.org>
parents: 7278
diff changeset
   417
        alpha-blend (using the source per-surface alpha)
6ff02ff3cf06 Updated blend semantics so blending uses the following formula:
Sam Lantinga <slouken@libsdl.org>
parents: 7278
diff changeset
   418
      Source surface blend mode set to SDL_BLENDMODE_NONE:
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   419
        copy RGB, set destination alpha to source per-surface alpha value.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   420
      both:
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   421
        if SDL_SRCCOLORKEY set, only copy the pixels matching the
7125
082c0c53ac16 Corrected spelling in header files.
Philipp Wiesemann <philipp.wiesemann@arcor.de>
parents: 6885
diff changeset
   422
        source color key.
7191
75360622e65f File style cleanup for the SDL 2.0 release
Sam Lantinga <slouken@libsdl.org>
parents: 7188
diff changeset
   423
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   424
    RGBA->RGBA:
7502
6ff02ff3cf06 Updated blend semantics so blending uses the following formula:
Sam Lantinga <slouken@libsdl.org>
parents: 7278
diff changeset
   425
      Source surface blend mode set to SDL_BLENDMODE_BLEND:
6ff02ff3cf06 Updated blend semantics so blending uses the following formula:
Sam Lantinga <slouken@libsdl.org>
parents: 7278
diff changeset
   426
        alpha-blend (using the source alpha-channel and per-surface alpha)
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   427
        SDL_SRCCOLORKEY ignored.
7502
6ff02ff3cf06 Updated blend semantics so blending uses the following formula:
Sam Lantinga <slouken@libsdl.org>
parents: 7278
diff changeset
   428
      Source surface blend mode set to SDL_BLENDMODE_NONE:
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   429
        copy all of RGBA to the destination.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   430
        if SDL_SRCCOLORKEY set, only copy the pixels matching the
7125
082c0c53ac16 Corrected spelling in header files.
Philipp Wiesemann <philipp.wiesemann@arcor.de>
parents: 6885
diff changeset
   431
        RGB values of the source color key, ignoring alpha in the
7502
6ff02ff3cf06 Updated blend semantics so blending uses the following formula:
Sam Lantinga <slouken@libsdl.org>
parents: 7278
diff changeset
   432
        comparison.
7191
75360622e65f File style cleanup for the SDL 2.0 release
Sam Lantinga <slouken@libsdl.org>
parents: 7188
diff changeset
   433
75360622e65f File style cleanup for the SDL 2.0 release
Sam Lantinga <slouken@libsdl.org>
parents: 7188
diff changeset
   434
    RGB->RGB:
7502
6ff02ff3cf06 Updated blend semantics so blending uses the following formula:
Sam Lantinga <slouken@libsdl.org>
parents: 7278
diff changeset
   435
      Source surface blend mode set to SDL_BLENDMODE_BLEND:
6ff02ff3cf06 Updated blend semantics so blending uses the following formula:
Sam Lantinga <slouken@libsdl.org>
parents: 7278
diff changeset
   436
        alpha-blend (using the source per-surface alpha)
6ff02ff3cf06 Updated blend semantics so blending uses the following formula:
Sam Lantinga <slouken@libsdl.org>
parents: 7278
diff changeset
   437
      Source surface blend mode set to SDL_BLENDMODE_NONE:
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   438
        copy RGB.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   439
      both:
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   440
        if SDL_SRCCOLORKEY set, only copy the pixels matching the
7125
082c0c53ac16 Corrected spelling in header files.
Philipp Wiesemann <philipp.wiesemann@arcor.de>
parents: 6885
diff changeset
   441
        source color key.
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   442
    \endverbatim
7191
75360622e65f File style cleanup for the SDL 2.0 release
Sam Lantinga <slouken@libsdl.org>
parents: 7188
diff changeset
   443
 *
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   444
 *  You should call SDL_BlitSurface() unless you know exactly how SDL
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   445
 *  blitting works internally and how to use the other blit functions.
2275
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   446
 */
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   447
#define SDL_BlitSurface SDL_UpperBlit
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   448
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   449
/**
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   450
 *  This is the public blit function, SDL_BlitSurface(), and it performs
3341
710139a1692d Fixed bug #826
Sam Lantinga <slouken@libsdl.org>
parents: 3103
diff changeset
   451
 *  rectangle validation and clipping before passing it to SDL_LowerBlit()
710139a1692d Fixed bug #826
Sam Lantinga <slouken@libsdl.org>
parents: 3103
diff changeset
   452
 */
2275
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   453
extern DECLSPEC int SDLCALL SDL_UpperBlit
4949
68da5a234bba The source rectangle isn't modified in SDL_UpperBlit
Sam Lantinga <slouken@libsdl.org>
parents: 4929
diff changeset
   454
    (SDL_Surface * src, const SDL_Rect * srcrect,
2275
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   455
     SDL_Surface * dst, SDL_Rect * dstrect);
3341
710139a1692d Fixed bug #826
Sam Lantinga <slouken@libsdl.org>
parents: 3103
diff changeset
   456
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   457
/**
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   458
 *  This is a semi-private blit function and it performs low-level surface
3341
710139a1692d Fixed bug #826
Sam Lantinga <slouken@libsdl.org>
parents: 3103
diff changeset
   459
 *  blitting only.
710139a1692d Fixed bug #826
Sam Lantinga <slouken@libsdl.org>
parents: 3103
diff changeset
   460
 */
2275
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   461
extern DECLSPEC int SDLCALL SDL_LowerBlit
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   462
    (SDL_Surface * src, SDL_Rect * srcrect,
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   463
     SDL_Surface * dst, SDL_Rect * dstrect);
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   464
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   465
/**
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   466
 *  \brief Perform a fast, low quality, stretch blit between two surfaces of the
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   467
 *         same pixel format.
7191
75360622e65f File style cleanup for the SDL 2.0 release
Sam Lantinga <slouken@libsdl.org>
parents: 7188
diff changeset
   468
 *
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3341
diff changeset
   469
 *  \note This function uses a static buffer, and is not thread-safe.
2275
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   470
 */
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   471
extern DECLSPEC int SDLCALL SDL_SoftStretch(SDL_Surface * src,
2828
7e5ff6cd05bf Added very slow software scaling to the X11 renderer
Sam Lantinga <slouken@libsdl.org>
parents: 2807
diff changeset
   472
                                            const SDL_Rect * srcrect,
2275
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   473
                                            SDL_Surface * dst,
2828
7e5ff6cd05bf Added very slow software scaling to the X11 renderer
Sam Lantinga <slouken@libsdl.org>
parents: 2807
diff changeset
   474
                                            const SDL_Rect * dstrect);
2275
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   475
5499
2b8e6d1e3817 Split SDL_BlitScaled into SDL_UpperBlitScaled and SDL_LowerBlitScaled.
Ken Rogoway <ken@rogoway.com>
parents: 5375
diff changeset
   476
#define SDL_BlitScaled SDL_UpperBlitScaled
2b8e6d1e3817 Split SDL_BlitScaled into SDL_UpperBlitScaled and SDL_LowerBlitScaled.
Ken Rogoway <ken@rogoway.com>
parents: 5375
diff changeset
   477
5296
48067bfc300c Software scaling support. Not very fast, but it seems to work.
Ken Rogoway <ken@rogoway.com>
parents: 5292
diff changeset
   478
/**
5499
2b8e6d1e3817 Split SDL_BlitScaled into SDL_UpperBlitScaled and SDL_LowerBlitScaled.
Ken Rogoway <ken@rogoway.com>
parents: 5375
diff changeset
   479
 *  This is the public scaled blit function, SDL_BlitScaled(), and it performs
2b8e6d1e3817 Split SDL_BlitScaled into SDL_UpperBlitScaled and SDL_LowerBlitScaled.
Ken Rogoway <ken@rogoway.com>
parents: 5375
diff changeset
   480
 *  rectangle validation and clipping before passing it to SDL_LowerBlitScaled()
5296
48067bfc300c Software scaling support. Not very fast, but it seems to work.
Ken Rogoway <ken@rogoway.com>
parents: 5292
diff changeset
   481
 */
5499
2b8e6d1e3817 Split SDL_BlitScaled into SDL_UpperBlitScaled and SDL_LowerBlitScaled.
Ken Rogoway <ken@rogoway.com>
parents: 5375
diff changeset
   482
extern DECLSPEC int SDLCALL SDL_UpperBlitScaled
5296
48067bfc300c Software scaling support. Not very fast, but it seems to work.
Ken Rogoway <ken@rogoway.com>
parents: 5292
diff changeset
   483
    (SDL_Surface * src, const SDL_Rect * srcrect,
5499
2b8e6d1e3817 Split SDL_BlitScaled into SDL_UpperBlitScaled and SDL_LowerBlitScaled.
Ken Rogoway <ken@rogoway.com>
parents: 5375
diff changeset
   484
    SDL_Surface * dst, SDL_Rect * dstrect);
2b8e6d1e3817 Split SDL_BlitScaled into SDL_UpperBlitScaled and SDL_LowerBlitScaled.
Ken Rogoway <ken@rogoway.com>
parents: 5375
diff changeset
   485
2b8e6d1e3817 Split SDL_BlitScaled into SDL_UpperBlitScaled and SDL_LowerBlitScaled.
Ken Rogoway <ken@rogoway.com>
parents: 5375
diff changeset
   486
/**
2b8e6d1e3817 Split SDL_BlitScaled into SDL_UpperBlitScaled and SDL_LowerBlitScaled.
Ken Rogoway <ken@rogoway.com>
parents: 5375
diff changeset
   487
 *  This is a semi-private blit function and it performs low-level surface
2b8e6d1e3817 Split SDL_BlitScaled into SDL_UpperBlitScaled and SDL_LowerBlitScaled.
Ken Rogoway <ken@rogoway.com>
parents: 5375
diff changeset
   488
 *  scaled blitting only.
2b8e6d1e3817 Split SDL_BlitScaled into SDL_UpperBlitScaled and SDL_LowerBlitScaled.
Ken Rogoway <ken@rogoway.com>
parents: 5375
diff changeset
   489
 */
2b8e6d1e3817 Split SDL_BlitScaled into SDL_UpperBlitScaled and SDL_LowerBlitScaled.
Ken Rogoway <ken@rogoway.com>
parents: 5375
diff changeset
   490
extern DECLSPEC int SDLCALL SDL_LowerBlitScaled
2b8e6d1e3817 Split SDL_BlitScaled into SDL_UpperBlitScaled and SDL_LowerBlitScaled.
Ken Rogoway <ken@rogoway.com>
parents: 5375
diff changeset
   491
    (SDL_Surface * src, SDL_Rect * srcrect,
2b8e6d1e3817 Split SDL_BlitScaled into SDL_UpperBlitScaled and SDL_LowerBlitScaled.
Ken Rogoway <ken@rogoway.com>
parents: 5375
diff changeset
   492
    SDL_Surface * dst, SDL_Rect * dstrect);
5296
48067bfc300c Software scaling support. Not very fast, but it seems to work.
Ken Rogoway <ken@rogoway.com>
parents: 5292
diff changeset
   493
48067bfc300c Software scaling support. Not very fast, but it seems to work.
Ken Rogoway <ken@rogoway.com>
parents: 5292
diff changeset
   494
2275
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   495
/* Ends C function definitions when using C++ */
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   496
#ifdef __cplusplus
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   497
}
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   498
#endif
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   499
#include "close_code.h"
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   500
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   501
#endif /* _SDL_surface_h */
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   502
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   503
/* vi: set ts=4 sw=4 expandtab: */