Mercurial > sdl-ios-xcode
annotate docs/man3/SDL_SetColors.3 @ 1032:c1c2efca4548
Date: Mon, 24 Jan 2005 21:37:56 +0800
From: Chris Taylor
Subject: Patch to put back dynamic OpenGL loading for MPW
I sent a patch a while ago that removes dynamic OpenGL loading for
Macintosh Programmer's Workshop. Dynamic loading DOES actually work
when an SDL program is built with MPW, it just has to be set up for it.
(Whoops!!) This is the ideal way to get OpenGL extensions to work,
which D2X uses quite a few of.
This patch puts dynamic loading back in SDL for Mac OS 9. It applies to
current CVS. I noticed that two members need to be set when
DrawSprocket is used.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 25 Jan 2005 16:57:11 +0000 |
| parents | e5bc29de3f0a |
| children | 546f7c1eb755 |
| rev | line source |
|---|---|
|
181
e5bc29de3f0a
Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
1 .TH "SDL_SetColors" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" |
| 0 | 2 .SH "NAME" |
| 3 SDL_SetColors\- Sets a portion of the colormap for the given 8-bit surface\&. | |
| 4 .SH "SYNOPSIS" | |
| 5 .PP | |
| 6 \fB#include "SDL\&.h" | |
| 7 .sp | |
| 8 \fBint \fBSDL_SetColors\fP\fR(\fBSDL_Surface *surface, SDL_Color *colors, int firstcolor, int ncolors\fR); | |
| 9 .SH "DESCRIPTION" | |
| 10 .PP | |
| 11 Sets a portion of the colormap for the given 8-bit surface\&. | |
| 12 .PP | |
| 13 When \fBsurface\fR is the surface associated with the current display, the display colormap will be updated with the requested colors\&. If \fBSDL_HWPALETTE\fP was set in \fISDL_SetVideoMode\fR flags, \fBSDL_SetColors\fP will always return \fB1\fR, and the palette is guaranteed to be set the way you desire, even if the window colormap has to be warped or run under emulation\&. | |
| 14 .PP | |
| 15 The color components of a \fI\fBSDL_Color\fR\fR structure are 8-bits in size, giving you a total of 256^3 =16777216 colors\&. | |
| 16 .PP | |
| 17 Palettized (8-bit) screen surfaces with the \fBSDL_HWPALETTE\fP flag have two palettes, a logical palette that is used for mapping blits to/from the surface and a physical palette (that determines how the hardware will map the colors to the display)\&. \fBSDL_SetColors\fP modifies both palettes (if present), and is equivalent to calling \fISDL_SetPalette\fR with the \fBflags\fR set to \fB(SDL_LOGPAL | SDL_PHYSPAL)\fP\&. | |
| 18 .SH "RETURN VALUE" | |
| 19 .PP | |
| 20 If \fBsurface\fR is not a palettized surface, this function does nothing, returning \fB0\fR\&. If all of the colors were set as passed to \fBSDL_SetColors\fP, it will return \fB1\fR\&. If not all the color entries were set exactly as given, it will return \fB0\fR, and you should look at the surface palette to determine the actual color palette\&. | |
| 21 .SH "EXAMPLE" | |
| 22 .PP | |
| 23 .nf | |
| 24 \f(CW/* Create a display surface with a grayscale palette */ | |
| 25 SDL_Surface *screen; | |
| 26 SDL_Color colors[256]; | |
| 27 int i; | |
| 28 \&. | |
| 29 \&. | |
| 30 \&. | |
| 31 /* Fill colors with color information */ | |
| 32 for(i=0;i<256;i++){ | |
| 33 colors[i]\&.r=i; | |
| 34 colors[i]\&.g=i; | |
| 35 colors[i]\&.b=i; | |
| 36 } | |
| 37 | |
| 38 /* Create display */ | |
| 39 screen=SDL_SetVideoMode(640, 480, 8, SDL_HWPALETTE); | |
| 40 if(!screen){ | |
| 41 printf("Couldn\&'t set video mode: %s | |
| 42 ", SDL_GetError()); | |
| 43 exit(-1); | |
| 44 } | |
| 45 | |
| 46 /* Set palette */ | |
| 47 SDL_SetColors(screen, colors, 0, 256); | |
| 48 \&. | |
| 49 \&. | |
| 50 \&. | |
| 51 \&.\fR | |
| 52 .fi | |
| 53 .PP | |
| 54 .SH "SEE ALSO" | |
| 55 .PP | |
| 56 \fI\fBSDL_Color\fR\fR \fI\fBSDL_Surface\fR\fR, \fI\fBSDL_SetPalette\fP\fR, \fI\fBSDL_SetVideoMode\fP\fR | |
|
181
e5bc29de3f0a
Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
57 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01 |