998 lines
36 KiB
C
998 lines
36 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2024 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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#define SDL_SIMD_ALIGNED 0x00000008 /**< Surface uses aligned memory */
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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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typedef struct SDL_BlitMap SDL_BlitMap; /* this is an opaque type. */
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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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/** list of BlitMap that hold a reference to this surface */
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void *list_blitmap; /**< Private */
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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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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 (SDLCALL *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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* \brief The formula used for converting between YUV and RGB
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*/
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typedef enum
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{
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SDL_YUV_CONVERSION_JPEG, /**< Full range JPEG */
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SDL_YUV_CONVERSION_BT601, /**< BT.601 (the default) */
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SDL_YUV_CONVERSION_BT709, /**< BT.709 */
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SDL_YUV_CONVERSION_AUTOMATIC /**< BT.601 for SD content, BT.709 for HD content */
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} SDL_YUV_CONVERSION_MODE;
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/**
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* Allocate a new RGB surface.
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*
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* If `depth` is 4 or 8 bits, an empty palette is allocated for the surface.
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* If `depth` is greater than 8 bits, the pixel format is set using the
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* [RGBA]mask parameters.
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*
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* The [RGBA]mask parameters are the bitmasks used to extract that color from
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* a pixel. For instance, `Rmask` being 0xFF000000 means the red data is
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* stored in the most significant byte. Using zeros for the RGB masks sets a
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* default value, based on the depth. For example:
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*
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* ```c++
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* SDL_CreateRGBSurface(0,w,h,32,0,0,0,0);
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* ```
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*
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* However, using zero for the Amask results in an Amask of 0.
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*
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* By default surfaces with an alpha mask are set up for blending as with:
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*
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* ```c++
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* SDL_SetSurfaceBlendMode(surface, SDL_BLENDMODE_BLEND)
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* ```
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*
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* You can change this by calling SDL_SetSurfaceBlendMode() and selecting a
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* different `blendMode`.
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*
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* \param flags the flags are unused and should be set to 0
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* \param width the width of the surface
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* \param height the height of the surface
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* \param depth the depth of the surface in bits
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* \param Rmask the red mask for the pixels
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* \param Gmask the green mask for the pixels
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* \param Bmask the blue mask for the pixels
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* \param Amask the alpha mask for the pixels
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* \returns the new SDL_Surface structure that is created or NULL if it fails;
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* call SDL_GetError() for more information.
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*
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* \since This function is available since SDL 2.0.0.
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*
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* \sa SDL_CreateRGBSurfaceFrom
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* \sa SDL_CreateRGBSurfaceWithFormat
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* \sa SDL_FreeSurface
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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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/* !!! FIXME for 2.1: why does this ask for depth? Format provides that. */
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/**
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* Allocate a new RGB surface with a specific pixel format.
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*
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* This function operates mostly like SDL_CreateRGBSurface(), except instead
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* of providing pixel color masks, you provide it with a predefined format
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* from SDL_PixelFormatEnum.
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*
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* \param flags the flags are unused and should be set to 0
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* \param width the width of the surface
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* \param height the height of the surface
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* \param depth the depth of the surface in bits
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* \param format the SDL_PixelFormatEnum for the new surface's pixel format.
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* \returns the new SDL_Surface structure that is created or NULL if it fails;
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* call SDL_GetError() for more information.
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*
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* \since This function is available since SDL 2.0.5.
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*
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* \sa SDL_CreateRGBSurface
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* \sa SDL_CreateRGBSurfaceFrom
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* \sa SDL_FreeSurface
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*/
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extern DECLSPEC SDL_Surface *SDLCALL SDL_CreateRGBSurfaceWithFormat
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(Uint32 flags, int width, int height, int depth, Uint32 format);
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/**
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* Allocate a new RGB surface with existing pixel data.
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*
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* This function operates mostly like SDL_CreateRGBSurface(), except it does
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* not allocate memory for the pixel data, instead the caller provides an
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* existing buffer of data for the surface to use.
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*
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* No copy is made of the pixel data. Pixel data is not managed automatically;
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* you must free the surface before you free the pixel data.
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*
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* \param pixels a pointer to existing pixel data
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* \param width the width of the surface
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* \param height the height of the surface
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* \param depth the depth of the surface in bits
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* \param pitch the pitch of the surface in bytes
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* \param Rmask the red mask for the pixels
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* \param Gmask the green mask for the pixels
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* \param Bmask the blue mask for the pixels
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* \param Amask the alpha mask for the pixels
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* \returns the new SDL_Surface structure that is created or NULL if it fails;
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* call SDL_GetError() for more information.
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*
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* \since This function is available since SDL 2.0.0.
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*
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* \sa SDL_CreateRGBSurface
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* \sa SDL_CreateRGBSurfaceWithFormat
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* \sa SDL_FreeSurface
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*/
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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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/* !!! FIXME for 2.1: why does this ask for depth? Format provides that. */
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/**
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* Allocate a new RGB surface with with a specific pixel format and existing
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* pixel data.
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*
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* This function operates mostly like SDL_CreateRGBSurfaceFrom(), except
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* instead of providing pixel color masks, you provide it with a predefined
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* format from SDL_PixelFormatEnum.
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*
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* No copy is made of the pixel data. Pixel data is not managed automatically;
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* you must free the surface before you free the pixel data.
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*
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* \param pixels a pointer to existing pixel data
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* \param width the width of the surface
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* \param height the height of the surface
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* \param depth the depth of the surface in bits
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* \param pitch the pitch of the surface in bytes
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* \param format the SDL_PixelFormatEnum for the new surface's pixel format.
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* \returns the new SDL_Surface structure that is created or NULL if it fails;
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* call SDL_GetError() for more information.
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*
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* \since This function is available since SDL 2.0.5.
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*
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* \sa SDL_CreateRGBSurfaceFrom
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* \sa SDL_CreateRGBSurfaceWithFormat
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* \sa SDL_FreeSurface
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*/
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extern DECLSPEC SDL_Surface *SDLCALL SDL_CreateRGBSurfaceWithFormatFrom
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(void *pixels, int width, int height, int depth, int pitch, Uint32 format);
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/**
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* Free an RGB surface.
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*
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* It is safe to pass NULL to this function.
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*
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* \param surface the SDL_Surface to free.
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*
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* \since This function is available since SDL 2.0.0.
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*
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* \sa SDL_CreateRGBSurface
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* \sa SDL_CreateRGBSurfaceFrom
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* \sa SDL_LoadBMP
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* \sa SDL_LoadBMP_RW
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*/
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extern DECLSPEC void SDLCALL SDL_FreeSurface(SDL_Surface * surface);
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/**
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* Set the palette used by a surface.
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*
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* A single palette can be shared with many surfaces.
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*
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* \param surface the SDL_Surface structure to update
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* \param palette the SDL_Palette structure to use
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* \returns 0 on success or a negative error code on failure; call
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* SDL_GetError() for more information.
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*
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* \since This function is available since SDL 2.0.0.
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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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* Set 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 to
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* and read from `surface->pixels`, using the pixel format stored in
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* `surface->format`. Once you are done accessing the surface, you should use
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* SDL_UnlockSurface() to release it.
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*
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* Not all surfaces require locking. If `SDL_MUSTLOCK(surface)` evaluates to
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* 0, then you can read and write to the surface at any time, and the pixel
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* format of the surface will not change.
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*
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* \param surface the SDL_Surface structure to be locked
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* \returns 0 on success or a negative error code on failure; call
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* SDL_GetError() for more information.
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*
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* \since This function is available since SDL 2.0.0.
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*
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* \sa SDL_MUSTLOCK
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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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/**
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* Release a surface after directly accessing the pixels.
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*
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* \param surface the SDL_Surface structure to be unlocked
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*
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* \since This function is available since SDL 2.0.0.
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*
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* \sa SDL_LockSurface
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*/
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extern DECLSPEC void SDLCALL SDL_UnlockSurface(SDL_Surface * surface);
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/**
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* Load a BMP image from a seekable SDL data stream.
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*
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* The new surface should be freed with SDL_FreeSurface(). Not doing so will
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* result in a memory leak.
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*
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* src is an open SDL_RWops buffer, typically loaded with SDL_RWFromFile.
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* Alternitavely, you might also use the macro SDL_LoadBMP to load a bitmap
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* from a file, convert it to an SDL_Surface and then close the file.
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*
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* \param src the data stream for the surface
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* \param freesrc non-zero to close the stream after being read
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* \returns a pointer to a new SDL_Surface structure or NULL if there was an
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* error; call SDL_GetError() for more information.
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*
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* \since This function is available since SDL 2.0.0.
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*
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* \sa SDL_FreeSurface
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* \sa SDL_RWFromFile
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* \sa SDL_LoadBMP
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* \sa SDL_SaveBMP_RW
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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 in BMP format.
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*
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* Surfaces with a 24-bit, 32-bit and paletted 8-bit format get saved in the
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* BMP directly. Other RGB formats with 8-bit or higher get converted to a
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* 24-bit surface or, if they have an alpha mask or a colorkey, to a 32-bit
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* surface before they are saved. YUV and paletted 1-bit and 4-bit formats are
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* not supported.
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*
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* \param surface the SDL_Surface structure containing the image to be saved
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* \param dst a data stream to save to
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* \param freedst non-zero to close the stream after being written
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* \returns 0 on success or a negative error code on failure; call
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* SDL_GetError() for more information.
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*
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* \since This function is available since SDL 2.0.0.
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*
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* \sa SDL_LoadBMP_RW
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* \sa SDL_SaveBMP
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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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* Set the RLE acceleration hint for a surface.
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*
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* If RLE is enabled, color key and alpha blending blits are much faster, but
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* the surface must be locked before directly accessing the pixels.
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*
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* \param surface the SDL_Surface structure to optimize
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* \param flag 0 to disable, non-zero to enable RLE acceleration
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* \returns 0 on success or a negative error code on failure; call
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* SDL_GetError() for more information.
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*
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* \since This function is available since SDL 2.0.0.
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*
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* \sa SDL_BlitSurface
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* \sa SDL_LockSurface
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* \sa SDL_UnlockSurface
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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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* Returns whether the surface is RLE enabled
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*
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* It is safe to pass a NULL `surface` here; it will return SDL_FALSE.
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*
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* \param surface the SDL_Surface structure to query
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* \returns SDL_TRUE if the surface is RLE enabled, SDL_FALSE otherwise.
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*
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* \since This function is available since SDL 2.0.14.
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*
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* \sa SDL_SetSurfaceRLE
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*/
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extern DECLSPEC SDL_bool SDLCALL SDL_HasSurfaceRLE(SDL_Surface * surface);
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/**
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* Set the color key (transparent pixel) in a surface.
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*
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* The color key defines a pixel value that will be treated as transparent in
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* a blit. For example, one can use this to specify that cyan pixels should be
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* considered transparent, and therefore not rendered.
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*
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* It is a pixel of the format used by the surface, as generated by
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* SDL_MapRGB().
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*
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* RLE acceleration can substantially speed up blitting of images with large
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* horizontal runs of transparent pixels. See SDL_SetSurfaceRLE() for details.
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*
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* \param surface the SDL_Surface structure to update
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* \param flag SDL_TRUE to enable color key, SDL_FALSE to disable color key
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* \param key the transparent pixel
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* \returns 0 on success or a negative error code on failure; call
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* SDL_GetError() for more information.
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*
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* \since This function is available since SDL 2.0.0.
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*
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* \sa SDL_BlitSurface
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* \sa SDL_GetColorKey
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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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* Returns whether the surface has a color key
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*
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* It is safe to pass a NULL `surface` here; it will return SDL_FALSE.
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*
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* \param surface the SDL_Surface structure to query
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* \return SDL_TRUE if the surface has a color key, SDL_FALSE otherwise.
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*
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* \since This function is available since SDL 2.0.9.
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*
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* \sa SDL_SetColorKey
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* \sa SDL_GetColorKey
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*/
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extern DECLSPEC SDL_bool SDLCALL SDL_HasColorKey(SDL_Surface * surface);
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/**
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* Get the color key (transparent pixel) for a surface.
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*
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* The color key is a pixel of the format used by the surface, as generated by
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* SDL_MapRGB().
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*
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* If the surface doesn't have color key enabled this function returns -1.
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*
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* \param surface the SDL_Surface structure to query
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* \param key a pointer filled in with the transparent pixel
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* \returns 0 on success or a negative error code on failure; call
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* SDL_GetError() for more information.
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*
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* \since This function is available since SDL 2.0.0.
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*
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* \sa SDL_BlitSurface
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* \sa SDL_SetColorKey
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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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* Set an additional color value multiplied into blit operations.
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*
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* When this surface is blitted, during the blit operation each source color
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* channel is modulated by the appropriate color value according to the
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* following formula:
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*
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* `srcC = srcC * (color / 255)`
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*
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* \param surface the SDL_Surface structure 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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* \returns 0 on success or a negative error code on failure; call
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* SDL_GetError() for more information.
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*
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|
* \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
|
|
}
|
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#endif
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#include "close_code.h"
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#endif /* SDL_surface_h_ */
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/* vi: set ts=4 sw=4 expandtab: */
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