SDL_RenderReadPixels
Use this function to read pixels from the current rendering target.
Syntax
int SDL_RenderReadPixels(SDL_Renderer* renderer,
const SDL_Rect* rect,
Uint32 format,
void* pixels,
int pitch)
Function Parameters
renderer |
the rendering context |
rect |
an SDL_Rect structure representing the area to read, or NULL for the entire render target |
format |
the desired format of the pixel data, or 0 to use the format of the rendering target; see Remarks for details |
pixels |
a pointer filled in with the pixel data |
pitch |
the pitch of the pixels parameter; see Remarks for details |
Return Value
Returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.
Code Examples
You can add your code example here
Remarks
![/!\](/moin_static198/fixedleft/img/alert.png "/!\"){kind=small}
WARNING: This is a very slow operation, and should not be used frequently.
format may be one of the following:
SDL_PIXELFORMAT_UNKNOWN |
|
SDL_PIXELFORMAT_INDEX1LSB |
|
SDL_PIXELFORMAT_INDEX1MSB |
|
SDL_PIXELFORMAT_INDEX4LSB |
|
SDL_PIXELFORMAT_INDEX4MSB |
|
SDL_PIXELFORMAT_INDEX8 |
|
SDL_PIXELFORMAT_RGB332 |
|
SDL_PIXELFORMAT_RGB444 |
|
SDL_PIXELFORMAT_RGB555 |
|
SDL_PIXELFORMAT_BGR555 |
|
SDL_PIXELFORMAT_ARGB4444 |
|
SDL_PIXELFORMAT_RGBA4444 |
|
SDL_PIXELFORMAT_ABGR4444 |
|
SDL_PIXELFORMAT_BGRA4444 |
|
SDL_PIXELFORMAT_ARGB1555 |
|
SDL_PIXELFORMAT_RGBA5551 |
|
SDL_PIXELFORMAT_ABGR1555 |
|
SDL_PIXELFORMAT_BGRA5551 |
|
SDL_PIXELFORMAT_RGB565 |
|
SDL_PIXELFORMAT_BGR565 |
|
SDL_PIXELFORMAT_RGB24 |
|
SDL_PIXELFORMAT_BGR24 |
|
SDL_PIXELFORMAT_RGB888 |
|
SDL_PIXELFORMAT_RGBX8888 |
|
SDL_PIXELFORMAT_BGR888 |
|
SDL_PIXELFORMAT_BGRX8888 |
|
SDL_PIXELFORMAT_ARGB8888 |
|
SDL_PIXELFORMAT_RGBA8888 |
|
SDL_PIXELFORMAT_ABGR8888 |
|
SDL_PIXELFORMAT_BGRA8888 |
|
SDL_PIXELFORMAT_ARGB2101010 |
|
SDL_PIXELFORMAT_RGBA32 |
alias for RGBA byte array of color data, for the current platform (>= SDL 2.0.5) |
SDL_PIXELFORMAT_ARGB32 |
alias for ARGB byte array of color data, for the current platform (>= SDL 2.0.5) |
SDL_PIXELFORMAT_BGRA32 |
alias for BGRA byte array of color data, for the current platform (>= SDL 2.0.5) |
SDL_PIXELFORMAT_ABGR32 |
alias for ABGR byte array of color data, for the current platform (>= SDL 2.0.5) |
SDL_PIXELFORMAT_YV12 |
planar mode: Y + V + U (3 planes) |
SDL_PIXELFORMAT_IYUV |
planar mode: Y + U + V (3 planes) |
SDL_PIXELFORMAT_YUY2 |
packed mode: Y0+U0+Y1+V0 (1 plane) |
SDL_PIXELFORMAT_UYVY |
packed mode: U0+Y0+V0+Y1 (1 plane) |
SDL_PIXELFORMAT_YVYU |
packed mode: Y0+V0+Y1+U0 (1 plane) |
SDL_PIXELFORMAT_NV12 |
planar mode: Y + U/V interleaved (2 planes) (>= SDL 2.0.4) |
SDL_PIXELFORMAT_NV21 |
planar mode: Y + V/U interleaved (2 planes) (>= SDL 2.0.4) |
pitch specifies the number of bytes between rows of pixels. This allows you to use a subrectangle of a larger pixels array or have padded rows in the pixel data. Generally, this should equal the number of pixels per row of pixel data times the number of bytes per pixel.
