mirror of
https://github.com/dolphin-emu/dolphin.git
synced 2025-02-11 06:59:07 +01:00
2db54798d7
I am not replacing the following header files used by the Windows build, as I don't have a Windows build setup to test. Please point the Windows build at the header files inside these clean distribution packages and garbage collect the duplicates: GLew/*.h and SDL/Include_1.2. git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@5711 8ced0084-cf51-0410-be5f-012b33b47a6e
23 lines
1.2 KiB
Groff
23 lines
1.2 KiB
Groff
.TH "SDL_DisplayFormatAlpha" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference"
|
|
.SH "NAME"
|
|
SDL_DisplayFormatAlpha \- Convert a surface to the display format
|
|
.SH "SYNOPSIS"
|
|
.PP
|
|
\fB#include "SDL\&.h"
|
|
.sp
|
|
\fBSDL_Surface *\fBSDL_DisplayFormatAlpha\fP\fR(\fBSDL_Surface *surface\fR);
|
|
.SH "DESCRIPTION"
|
|
.PP
|
|
This function takes a surface and copies it to a new surface of the pixel format and colors of the video framebuffer plus an alpha channel, suitable for fast blitting onto the display surface\&. It calls \fISDL_ConvertSurface\fR
|
|
.PP
|
|
If you want to take advantage of hardware colorkey or alpha blit acceleration, you should set the colorkey and alpha value before calling this function\&.
|
|
.PP
|
|
This function can be used to convert a colourkey to an alpha channel, if the \fBSDL_SRCCOLORKEY\fP flag is set on the surface\&. The generated surface will then be transparent (alpha=0) where the pixels match the colourkey, and opaque (alpha=255) elsewhere\&.
|
|
.SH "RETURN VALUE"
|
|
.PP
|
|
If the conversion fails or runs out of memory, it returns \fBNULL\fR
|
|
.SH "SEE ALSO"
|
|
.PP
|
|
\fISDL_ConvertSurface\fR, \fISDL_SetAlpha\fR, \fISDL_SetColorKey\fR, \fISDL_DisplayFormat\fR, \fISDL_Surface\fR
|
|
.\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01
|