Mercurial > sdl-ios-xcode
annotate docs/man3/SDL_SetPalette.3 @ 664:abfdc08eb289
Date: Sun, 3 Aug 2003 22:07:57 +0200
From: Max Horn
Subject: SDL OSX fullscreen FIX
the attached patch fixes the fullscreen problems on SDL/OSX. The cause
was that click events are bounded by winRect. Now, winRect is set to
the size of the video surface. But if you e.g. request a 640x420
surface, you might get a 640x480 "real" surface. Still,
SDL_VideoSurface->h will be set to 420! Thus, the upper 60 pixels in my
example received no mouse down events.
My fix simply disables this clipping when in full screen mode - after
all, all clicks then should be inside the screen surface. Higher SDL
functions ensure that the coordinates then are clipped to 640x420. It
works fine in all my tests here. I don't know if it's the right thing
to do in multi screen scenarios, though.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 04 Aug 2003 01:00:30 +0000 |
| parents | e5bc29de3f0a |
| children | 546f7c1eb755 |
| rev | line source |
|---|---|
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181
e5bc29de3f0a
Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
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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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55f1f1b3e27d
Added new docs for SDL 1.2.1
Sam Lantinga <slouken@lokigames.com>
parents:
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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 | |
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181
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Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
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59 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01 |