Mercurial > sdl-ios-xcode
annotate docs/man3/SDL_SetPalette.3 @ 1282:217f5d5a49e5
Date: Sat, 15 Jan 2005 02:01:51 +0000 (UTC)
From: jimrandomh
Subject: [SDL] Re: Modifier keys pressed during initialization stick
I wrote a simple test program which initializes SDL, prints the SDL
version number, then prints any keydown and keyup events with their
modifiers. (Source code below). Compilation was done using Visual
Studio 6, release mode.
My test sequence was:
Start a command prompt. Type the name of the test program.
shift down
enter down (program starts)
Wait for window to appear
enter up
shift up
spacebar down
spacebar up
Under Windows 98, the output was correct:
SDL 1.2.8
left shift down
shift-return down
shift-return up
left shift up
space down
space up
Under Windows 2000 and under Windows XP, the output was:
SDL 1.2.8
shift-space down
shift-space up
Since shift was not held at the time space was pressed, this is
incorrect. Similar results were observed with launching in different
ways (including double-clicking in Windows Explorer), so it does not
depend on the launching terminal.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sun, 29 Jan 2006 07:57:13 +0000 |
parents | e5bc29de3f0a |
children | 546f7c1eb755 |
rev | line source |
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Sam Lantinga <slouken@libsdl.org>
parents:
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1 .TH "SDL_SetPalette" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" |
0 | 2 .SH "NAME" |
3 SDL_SetPalette\- Sets the colors in the palette of an 8-bit surface\&. | |
4 .SH "SYNOPSIS" | |
5 .PP | |
6 \fB#include "SDL\&.h" | |
7 .sp | |
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8 \fBint \fBSDL_SetPalette\fP\fR(\fBSDL_Surface *surface, int flags, SDL_Color *colors, int firstcolor, int ncolors\fR); |
0 | 9 .SH "DESCRIPTION" |
10 .PP | |
11 Sets a portion of the palette for the given 8-bit surface\&. | |
12 .PP | |
13 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)\&. \fISDL_BlitSurface\fR always uses the logical palette when blitting surfaces (if it has to convert between surface pixel formats)\&. Because of this, it is often useful to modify only one or the other palette to achieve various special color effects (e\&.g\&., screen fading, color flashes, screen dimming)\&. | |
14 .PP | |
15 This function can modify either the logical or physical palette by specifing \fBSDL_LOGPAL\fP or \fBSDL_PHYSPAL\fPthe in the \fBflags\fR parameter\&. | |
16 .PP | |
17 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_SetPalette\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\&. | |
18 .PP | |
19 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\&. | |
20 .SH "RETURN VALUE" | |
21 .PP | |
22 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_SetPalette\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\&. | |
23 .SH "EXAMPLE" | |
24 .PP | |
25 .nf | |
26 \f(CW /* Create a display surface with a grayscale palette */ | |
27 SDL_Surface *screen; | |
28 SDL_Color colors[256]; | |
29 int i; | |
30 \&. | |
31 \&. | |
32 \&. | |
33 /* Fill colors with color information */ | |
34 for(i=0;i<256;i++){ | |
35 colors[i]\&.r=i; | |
36 colors[i]\&.g=i; | |
37 colors[i]\&.b=i; | |
38 } | |
39 | |
40 /* Create display */ | |
41 screen=SDL_SetVideoMode(640, 480, 8, SDL_HWPALETTE); | |
42 if(!screen){ | |
43 printf("Couldn\&'t set video mode: %s | |
44 ", SDL_GetError()); | |
45 exit(-1); | |
46 } | |
47 | |
48 /* Set palette */ | |
49 SDL_SetPalette(screen, SDL_LOGPAL|SDL_PHYSPAL, colors, 0, 256); | |
50 \&. | |
51 \&. | |
52 \&. | |
53 \&.\fR | |
54 .fi | |
55 .PP | |
56 .SH "SEE ALSO" | |
57 .PP | |
58 \fISDL_SetColors\fR, \fISDL_SetVideoMode\fR, \fISDL_Surface\fR, \fISDL_Color\fR | |
181
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Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
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59 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01 |