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From: "Alex Volkov" Date: Thu, 10 Nov 2005 21:53:40 -0500 Subject: [SDL] BUG[?]: 32bpp RGBA->RGB colorkey blit, no SDL_SRCALPHA It seems there is either a documentation vs. reality mismatch or a real bug in SDL_blit_N.c:BlitNtoNKey(). The exact blit in question is a 32bpp RGBA->RGB, where RGBA has SDL_COLORKEY and *no* SDL_SRCALPHA flags. The doc in SDL_video.h states: * RGBA->RGB: * SDL_SRCALPHA not set: * copy RGB. * if SDL_SRCCOLORKEY set, only copy the pixels matching the * RGB values of the source colour key, ignoring alpha in the * comparison. BlitNtoNKey(), however, forgets to "ignore alpha in the comparison". The documentation makes perfect sense, so I think it is the code that is faulty. The attached patch corrects the code.
author Sam Lantinga <slouken@libsdl.org>
date Wed, 15 Mar 2006 15:43:15 +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_SetModState" "3" "Tue 11 Sep 2001, 23:00" "SDL" "SDL API Reference"
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2 .SH "NAME"
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3 SDL_SetModState\- Set the current key modifier state
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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 \fBvoid \fBSDL_SetModState\fP\fR(\fBSDLMod modstate\fR);
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9 .SH "DESCRIPTION"
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10 .PP
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11 The inverse of \fI\fBSDL_GetModState\fP\fR, \fBSDL_SetModState\fP allows you to impose modifier key states on your application\&.
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12 .PP
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13 Simply pass your desired modifier states into \fBmodstate\fR\&. This value my be a logical OR\&'d combination of the following:
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14 .PP
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15 .nf
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16 \f(CWtypedef enum {
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17 KMOD_NONE = 0x0000,
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18 KMOD_LSHIFT= 0x0001,
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19 KMOD_RSHIFT= 0x0002,
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20 KMOD_LCTRL = 0x0040,
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21 KMOD_RCTRL = 0x0080,
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22 KMOD_LALT = 0x0100,
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23 KMOD_RALT = 0x0200,
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24 KMOD_LMETA = 0x0400,
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25 KMOD_RMETA = 0x0800,
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26 KMOD_NUM = 0x1000,
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27 KMOD_CAPS = 0x2000,
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28 KMOD_MODE = 0x4000,
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29 } SDLMod;\fR
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30 .fi
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31 .PP
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32 .SH "SEE ALSO"
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33 .PP
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34 \fI\fBSDL_GetModState\fP\fR
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35 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:00