Mercurial > sdl-ios-xcode
annotate docs/html/sdlmaprgb.html @ 4106:12bb6311fd5d SDL-1.2
Hans de Goede fixed bug #495
When running boswars: http://www.boswars.org/ on a machine with intel
integrathed graphics it crashes when it tries to play the initial theora
splashscreen video:
X Error of failed request: BadAlloc (insufficient resources for operation)
Major opcode of failed request: 140 (XVideo)
Minor opcode of failed request: 19 ()
Serial number of failed request: 25
Current serial number in output stream: 26
boswars: xcb_xlib.c:41: xcb_xlib_lock: Assertion `!c->xlib.lock' failed.
Aborted
I recognized this problem from a few years back, when I encountered it while
working on the Xv blitter for xmame. The problem is that for some reason
creation the Xvport and XvImage succeeds, and failure (lack of resources / hw
capability?) is only indicated during the first XvPut[Shm]Image. I've written a
patch for SDL using the work around for this I developed for xmame (and which
is still used successfully in xmame after many years of usage).
I'll admit it isn't very pretty, but after investigating several possibilities
this was the best option, any other fixes would need changes to the SDL api and
abi.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sat, 29 Dec 2007 02:23:48 +0000 |
parents | 355632dca928 |
children |
rev | line source |
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0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >SDL_MapRGB</TITLE | |
5 ><META | |
6 NAME="GENERATOR" | |
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7 CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ |
0 | 8 "><LINK |
9 REL="HOME" | |
10 TITLE="SDL Library Documentation" | |
11 HREF="index.html"><LINK | |
12 REL="UP" | |
13 TITLE="Video" | |
14 HREF="video.html"><LINK | |
15 REL="PREVIOUS" | |
16 TITLE="SDL_SetGammaRamp" | |
17 HREF="sdlsetgammaramp.html"><LINK | |
18 REL="NEXT" | |
19 TITLE="SDL_MapRGBA" | |
20 HREF="sdlmaprgba.html"></HEAD | |
21 ><BODY | |
22 CLASS="REFENTRY" | |
23 BGCOLOR="#FFF8DC" | |
24 TEXT="#000000" | |
25 LINK="#0000ee" | |
26 VLINK="#551a8b" | |
27 ALINK="#ff0000" | |
28 ><DIV | |
29 CLASS="NAVHEADER" | |
30 ><TABLE | |
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31 SUMMARY="Header navigation table" |
0 | 32 WIDTH="100%" |
33 BORDER="0" | |
34 CELLPADDING="0" | |
35 CELLSPACING="0" | |
36 ><TR | |
37 ><TH | |
38 COLSPAN="3" | |
39 ALIGN="center" | |
40 >SDL Library Documentation</TH | |
41 ></TR | |
42 ><TR | |
43 ><TD | |
44 WIDTH="10%" | |
45 ALIGN="left" | |
46 VALIGN="bottom" | |
47 ><A | |
48 HREF="sdlsetgammaramp.html" | |
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49 ACCESSKEY="P" |
0 | 50 >Prev</A |
51 ></TD | |
52 ><TD | |
53 WIDTH="80%" | |
54 ALIGN="center" | |
55 VALIGN="bottom" | |
56 ></TD | |
57 ><TD | |
58 WIDTH="10%" | |
59 ALIGN="right" | |
60 VALIGN="bottom" | |
61 ><A | |
62 HREF="sdlmaprgba.html" | |
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63 ACCESSKEY="N" |
0 | 64 >Next</A |
65 ></TD | |
66 ></TR | |
67 ></TABLE | |
68 ><HR | |
69 ALIGN="LEFT" | |
70 WIDTH="100%"></DIV | |
71 ><H1 | |
72 ><A | |
73 NAME="SDLMAPRGB" | |
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74 ></A |
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75 >SDL_MapRGB</H1 |
0 | 76 ><DIV |
77 CLASS="REFNAMEDIV" | |
78 ><A | |
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79 NAME="AEN1652" |
0 | 80 ></A |
81 ><H2 | |
82 >Name</H2 | |
83 >SDL_MapRGB -- Map a RGB color value to a pixel format.</DIV | |
84 ><DIV | |
85 CLASS="REFSYNOPSISDIV" | |
86 ><A | |
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87 NAME="AEN1655" |
0 | 88 ></A |
89 ><H2 | |
90 >Synopsis</H2 | |
91 ><DIV | |
92 CLASS="FUNCSYNOPSIS" | |
93 ><A | |
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94 NAME="AEN1656" |
0 | 95 ></A |
96 ><P | |
97 ></P | |
98 ><PRE | |
99 CLASS="FUNCSYNOPSISINFO" | |
100 >#include "SDL.h"</PRE | |
101 ><P | |
102 ><CODE | |
103 ><CODE | |
104 CLASS="FUNCDEF" | |
105 >Uint32 <B | |
106 CLASS="FSFUNC" | |
107 >SDL_MapRGB</B | |
108 ></CODE | |
109 >(SDL_PixelFormat *fmt, Uint8 r, Uint8 g, Uint8 b);</CODE | |
110 ></P | |
111 ><P | |
112 ></P | |
113 ></DIV | |
114 ></DIV | |
115 ><DIV | |
116 CLASS="REFSECT1" | |
117 ><A | |
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118 NAME="AEN1662" |
0 | 119 ></A |
120 ><H2 | |
121 >Description</H2 | |
122 ><P | |
123 >Maps the RGB color value to the specified pixel format and returns the | |
124 pixel value as a 32-bit int.</P | |
125 ><P | |
126 >If the format has a palette (8-bit) the index of the closest matching | |
127 color in the palette will be returned.</P | |
128 ><P | |
129 >If the specified pixel format has an alpha component it will be returned | |
130 as all 1 bits (fully opaque).</P | |
131 ></DIV | |
132 ><DIV | |
133 CLASS="REFSECT1" | |
134 ><A | |
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135 NAME="AEN1667" |
0 | 136 ></A |
137 ><H2 | |
138 >Return Value</H2 | |
139 ><P | |
140 >A pixel value best approximating the given RGB color value for a given | |
141 pixel format. If the pixel format bpp (color depth) is less than 32-bpp | |
142 then the unused upper bits of the return value can safely be ignored | |
143 (e.g., with a 16-bpp format the return value can be assigned to a | |
144 <SPAN | |
145 CLASS="TYPE" | |
146 >Uint16</SPAN | |
147 >, and similarly a <SPAN | |
148 CLASS="TYPE" | |
149 >Uint8</SPAN | |
150 > for an 8-bpp | |
151 format).</P | |
152 ></DIV | |
153 ><DIV | |
154 CLASS="REFSECT1" | |
155 ><A | |
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156 NAME="AEN1672" |
0 | 157 ></A |
158 ><H2 | |
159 >See Also</H2 | |
160 ><P | |
161 ><A | |
162 HREF="sdlgetrgb.html" | |
163 ><TT | |
164 CLASS="FUNCTION" | |
165 >SDL_GetRGB</TT | |
166 ></A | |
167 >, | |
168 <A | |
169 HREF="sdlgetrgba.html" | |
170 ><TT | |
171 CLASS="FUNCTION" | |
172 >SDL_GetRGBA</TT | |
173 ></A | |
174 >, | |
175 <A | |
176 HREF="sdlmaprgba.html" | |
177 ><TT | |
178 CLASS="FUNCTION" | |
179 >SDL_MapRGBA</TT | |
180 ></A | |
181 >, | |
182 <A | |
183 HREF="sdlpixelformat.html" | |
184 ><SPAN | |
185 CLASS="STRUCTNAME" | |
186 >SDL_PixelFormat</SPAN | |
187 ></A | |
188 ></P | |
189 ></DIV | |
190 ><DIV | |
191 CLASS="NAVFOOTER" | |
192 ><HR | |
193 ALIGN="LEFT" | |
194 WIDTH="100%"><TABLE | |
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195 SUMMARY="Footer navigation table" |
0 | 196 WIDTH="100%" |
197 BORDER="0" | |
198 CELLPADDING="0" | |
199 CELLSPACING="0" | |
200 ><TR | |
201 ><TD | |
202 WIDTH="33%" | |
203 ALIGN="left" | |
204 VALIGN="top" | |
205 ><A | |
206 HREF="sdlsetgammaramp.html" | |
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207 ACCESSKEY="P" |
0 | 208 >Prev</A |
209 ></TD | |
210 ><TD | |
211 WIDTH="34%" | |
212 ALIGN="center" | |
213 VALIGN="top" | |
214 ><A | |
215 HREF="index.html" | |
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216 ACCESSKEY="H" |
0 | 217 >Home</A |
218 ></TD | |
219 ><TD | |
220 WIDTH="33%" | |
221 ALIGN="right" | |
222 VALIGN="top" | |
223 ><A | |
224 HREF="sdlmaprgba.html" | |
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225 ACCESSKEY="N" |
0 | 226 >Next</A |
227 ></TD | |
228 ></TR | |
229 ><TR | |
230 ><TD | |
231 WIDTH="33%" | |
232 ALIGN="left" | |
233 VALIGN="top" | |
234 >SDL_SetGammaRamp</TD | |
235 ><TD | |
236 WIDTH="34%" | |
237 ALIGN="center" | |
238 VALIGN="top" | |
239 ><A | |
240 HREF="video.html" | |
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241 ACCESSKEY="U" |
0 | 242 >Up</A |
243 ></TD | |
244 ><TD | |
245 WIDTH="33%" | |
246 ALIGN="right" | |
247 VALIGN="top" | |
248 >SDL_MapRGBA</TD | |
249 ></TR | |
250 ></TABLE | |
251 ></DIV | |
252 ></BODY | |
253 ></HTML | |
254 > |