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annotate docs/man3/SDL_SetColorKey.3 @ 693:6c119628180d

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Date: Sat, 16 Aug 2003 16:22:56 +0300 From: "Mike Gorchak" Subject: Package building for QNX6 I'm just completed the package description file for QNX6 - qpg, it is like a\ .spec files for Linux. Please place SDL.qpg.in file in the root of the proj\ ect, where .spec file is placed. And sdl12qpg.diff - just adding the SDL.qpg\ .in. The same for the SDL_image. I'm planning to add .qpg files creation for\ all SDL* projects. As for shared library building for QNX6. It is very hard to improve the exis\ ting libtool code to support QNX shared libraries. Much easyiest is to remov\ e libtool.m4 code from the acinclude.m4 for those persons, who building shar\ ed libraries for QNX6. I'm described all what they need to do with .so under\ QNX6 in the README.QNX file. And 90% of people used the precompiled librari\ es, so I think it is not big problem :)
author Sam Lantinga <slouken@libsdl.org>
date Sat, 23 Aug 2003 23:25:46 +0000
parents e5bc29de3f0a
children 546f7c1eb755
rev   line source
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e5bc29de3f0a Updated from the SDL Documentation Project
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1 .TH "SDL_SetColorKey" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference"
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2 .SH "NAME"
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3 SDL_SetColorKey\- Sets the color key (transparent pixel) in a blittable surface and RLE acceleration\&.
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4 .SH "SYNOPSIS"
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5 .PP
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6 \fB#include "SDL\&.h"
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7 .sp
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8 \fBint \fBSDL_SetColorKey\fP\fR(\fBSDL_Surface *surface, Uint32 flag, Uint32 key\fR);
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9 .SH "DESCRIPTION"
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10 .PP
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11 Sets the color key (transparent pixel) in a blittable surface and enables or disables RLE blit acceleration\&.
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12 .PP
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13 RLE acceleration can substantially speed up blitting of images with large horizontal runs of transparent pixels (i\&.e\&., pixels that match the \fBkey\fR value)\&. The \fBkey\fR must be of the same pixel format as the \fBsurface\fR, \fI\fBSDL_MapRGB\fP\fR is often useful for obtaining an acceptable value\&.
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14 .PP
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15 If \fBflag\fR is \fBSDL_SRCCOLORKEY\fP then \fBkey\fR is the transparent pixel value in the source image of a blit\&.
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16 .PP
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17 If \fBflag\fR is OR\&'d with \fBSDL_RLEACCEL\fP then the surface will be draw using RLE acceleration when drawn with \fISDL_BlitSurface\fR\&. The surface will actually be encoded for RLE acceleration the first time \fISDL_BlitSurface\fR or \fISDL_DisplayFormat\fR is called on the surface\&.
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18 .PP
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19 If \fBflag\fR is 0, this function clears any current color key\&.
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20 .SH "RETURN VALUE"
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21 .PP
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22 This function returns \fB0\fR, or \fB-1\fR if there was an error\&.
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23 .SH "SEE ALSO"
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24 .PP
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25 \fI\fBSDL_BlitSurface\fP\fR, \fI\fBSDL_DisplayFormat\fP\fR, \fI\fBSDL_MapRGB\fP\fR, \fI\fBSDL_SetAlpha\fP\fR
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26 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01