|
Size: 915
Comment: update formatting - enums, structs, the/an
|
Size: 1021
Comment: update content - w/ Sam; remove draft
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 3: | Line 3: |
| ||<tablewidth="100%" style="color: #FF0000;" :> DRAFT|| | |
| Line 29: | Line 28: |
| ''You can add useful comments here'' | When a 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` |
| Line 33: | Line 33: |
| .[[SDL_SetSurfaceColorMod]] |
SDL_SetSurfaceAlphaMod
Use this function to set an additional alpha value used in blit operations.
Contents
Syntax
int SDL_SetSurfaceAlphaMod(SDL_Surface* surface,
Uint8 alpha)
Function Parameters
surface |
the SDL_Surface structure to update |
alpha |
the source alpha value multiplied into blit operations |
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
When a 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
