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| author | Jesse Hall <jessehall@google.com> | 2012-07-09 11:27:07 -0700 |
|---|---|---|
| committer | Jesse Hall <jessehall@google.com> | 2012-07-22 00:35:08 -0700 |
| commit | 9682c8870b8ff5e4ac2e4c70b759f791c6f38c1f (patch) | |
| tree | ded6ee18c4e1f33df235e53615a6d65e2d64f4ef /distrib/sdl-1.2.15/docs/man3/SDL_DisplayFormatAlpha.3 | |
| parent | 74b55003f76dbca96e4a26d98fe464081ca5341f (diff) | |
| download | external_qemu-9682c8870b8ff5e4ac2e4c70b759f791c6f38c1f.zip external_qemu-9682c8870b8ff5e4ac2e4c70b759f791c6f38c1f.tar.gz external_qemu-9682c8870b8ff5e4ac2e4c70b759f791c6f38c1f.tar.bz2 | |
Import SDL release-1.2.15
Change-Id: I505c4aea24325cad475f217db5589814b4c75dbf
Diffstat (limited to 'distrib/sdl-1.2.15/docs/man3/SDL_DisplayFormatAlpha.3')
| -rw-r--r-- | distrib/sdl-1.2.15/docs/man3/SDL_DisplayFormatAlpha.3 | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/distrib/sdl-1.2.15/docs/man3/SDL_DisplayFormatAlpha.3 b/distrib/sdl-1.2.15/docs/man3/SDL_DisplayFormatAlpha.3 new file mode 100644 index 0000000..a87ddd5 --- /dev/null +++ b/distrib/sdl-1.2.15/docs/man3/SDL_DisplayFormatAlpha.3 @@ -0,0 +1,22 @@ +.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 |