SDL_Surface
NAMESTRUCTURE DEFINITION
STRUCTURE DATA
DESCRIPTION
SEE ALSO
NAME
SDL_Surface − Graphical Surface Structure
STRUCTURE DEFINITION
typedef struct SDL_Surface {
Uint32 flags; /* Read-only */
SDL_PixelFormat *format; /* Read-only */
int w, h; /* Read-only */
Uint16 pitch; /* Read-only */
void *pixels; /* Read-write */
/* clipping information */
SDL_Rect clip_rect; /* Read-only */
/* Reference count -- used when freeing surface */
int refcount; /* Read-mostly */
/* This structure also contains private fields not shown here */
} SDL_Surface;
STRUCTURE DATA
|
flags |
Surface flags |
|||
|
format |
Pixel format |
|||
|
w, h |
Width and height of the surface |
|||
|
pitch |
Length of a surface scanline in bytes |
|||
|
pixels |
Pointer to the actual pixel data |
|||
|
clip_rect |
surface clip rectangle |
DESCRIPTION
SDL_Surface’s represent areas of "graphical" memory, memory that can be drawn to. The video framebuffer is returned as a SDL_Surface by SDL_SetVideoMode and SDL_GetVideoSurface. Most of the fields should be pretty obvious. w and h are the width and height of the surface in pixels. pixels is a pointer to the actual pixel data, the surface should be locked before accessing this field. The clip_rect field is the clipping rectangle as set by SDL_SetClipRect.
The following are supported in the flags field.
|
SDL_SWSURFACE |
Surface is stored in system memory | ||
|
SDL_HWSURFACE |
Surface is stored in video memory | ||
|
SDL_ASYNCBLIT |
Surface uses asynchronous blits if possible | ||
|
SDL_ANYFORMAT |
Allows any pixel-format (Display surface) | ||
|
SDL_HWPALETTE |
Surface has exclusive palette | ||
|
SDL_DOUBLEBUF |
Surface is double buffered (Display surface) | ||
|
SDL_FULLSCREEN |
Surface is full screen (Display Surface) | ||
|
SDL_OPENGL |
Surface has an OpenGL context (Display Surface) | ||
|
SDL_OPENGLBLIT |
Surface supports OpenGL blitting (Display Surface) | ||
|
SDL_RESIZABLE |
Surface is resizable (Display Surface) | ||
|
SDL_HWACCEL |
Surface blit uses hardware acceleration | ||
|
SDL_SRCCOLORKEY |
Surface use colorkey blitting | ||
|
SDL_RLEACCEL |
Colorkey blitting is accelerated with RLE | ||
|
SDL_SRCALPHA |
Surface blit uses alpha blending | ||
|
SDL_PREALLOC |
Surface uses preallocated memory |
SEE ALSO
SDL_PixelFormat
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