Mercurial > sdl-ios-xcode
annotate docs/html/sdlgetrgb.html @ 1795:398ac0f88e4d
Fixed bug #220
The AltiVec blitters don't compile, since they require __VEC__ to be enabled in
order for the compiler to understand "vector" and friends (i.e. do AltiVec)
But you don't want to turn AltiVec on globally, since then the code would only
run on a G4 (there are already runtime tests, before using the AltiVec
variants)
The solution here is to enable AltiVec locally, for the actual AltiVec code.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Tue, 09 May 2006 15:09:47 +0000 |
parents | 355632dca928 |
children |
rev | line source |
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0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >SDL_GetRGB</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_MapRGBA" | |
17 HREF="sdlmaprgba.html"><LINK | |
18 REL="NEXT" | |
19 TITLE="SDL_GetRGBA" | |
20 HREF="sdlgetrgba.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="sdlmaprgba.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="sdlgetrgba.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="SDLGETRGB" | |
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74 ></A |
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75 >SDL_GetRGB</H1 |
0 | 76 ><DIV |
77 CLASS="REFNAMEDIV" | |
78 ><A | |
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79 NAME="AEN1718" |
0 | 80 ></A |
81 ><H2 | |
82 >Name</H2 | |
83 >SDL_GetRGB -- Get RGB values from a pixel in the specified pixel format.</DIV | |
84 ><DIV | |
85 CLASS="REFSYNOPSISDIV" | |
86 ><A | |
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87 NAME="AEN1721" |
0 | 88 ></A |
89 ><H2 | |
90 >Synopsis</H2 | |
91 ><DIV | |
92 CLASS="FUNCSYNOPSIS" | |
93 ><A | |
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94 NAME="AEN1722" |
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 >void <B | |
106 CLASS="FSFUNC" | |
107 >SDL_GetRGB</B | |
108 ></CODE | |
109 >(Uint32 pixel, 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="AEN1728" |
0 | 119 ></A |
120 ><H2 | |
121 >Description</H2 | |
122 ><P | |
123 >Get RGB component values from a pixel stored in the specified pixel format.</P | |
124 ><P | |
125 >This function uses the entire 8-bit [0..255] range when converting color | |
126 components from pixel formats with less than 8-bits per RGB component | |
127 (e.g., a completely white pixel in 16-bit RGB565 format would return | |
128 [0xff, 0xff, 0xff] not [0xf8, 0xfc, 0xf8]).</P | |
129 ></DIV | |
130 ><DIV | |
131 CLASS="REFSECT1" | |
132 ><A | |
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133 NAME="AEN1732" |
0 | 134 ></A |
135 ><H2 | |
136 >See Also</H2 | |
137 ><P | |
138 ><A | |
139 HREF="sdlgetrgba.html" | |
140 ><TT | |
141 CLASS="FUNCTION" | |
142 >SDL_GetRGBA</TT | |
143 ></A | |
144 >, | |
145 <A | |
146 HREF="sdlmaprgb.html" | |
147 ><TT | |
148 CLASS="FUNCTION" | |
149 >SDL_MapRGB</TT | |
150 ></A | |
151 >, | |
152 <A | |
153 HREF="sdlmaprgba.html" | |
154 ><TT | |
155 CLASS="FUNCTION" | |
156 >SDL_MapRGBA</TT | |
157 ></A | |
158 >, | |
159 <A | |
160 HREF="sdlpixelformat.html" | |
161 ><SPAN | |
162 CLASS="STRUCTNAME" | |
163 >SDL_PixelFormat</SPAN | |
164 ></A | |
165 ></P | |
166 ></DIV | |
167 ><DIV | |
168 CLASS="NAVFOOTER" | |
169 ><HR | |
170 ALIGN="LEFT" | |
171 WIDTH="100%"><TABLE | |
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172 SUMMARY="Footer navigation table" |
0 | 173 WIDTH="100%" |
174 BORDER="0" | |
175 CELLPADDING="0" | |
176 CELLSPACING="0" | |
177 ><TR | |
178 ><TD | |
179 WIDTH="33%" | |
180 ALIGN="left" | |
181 VALIGN="top" | |
182 ><A | |
183 HREF="sdlmaprgba.html" | |
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184 ACCESSKEY="P" |
0 | 185 >Prev</A |
186 ></TD | |
187 ><TD | |
188 WIDTH="34%" | |
189 ALIGN="center" | |
190 VALIGN="top" | |
191 ><A | |
192 HREF="index.html" | |
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193 ACCESSKEY="H" |
0 | 194 >Home</A |
195 ></TD | |
196 ><TD | |
197 WIDTH="33%" | |
198 ALIGN="right" | |
199 VALIGN="top" | |
200 ><A | |
201 HREF="sdlgetrgba.html" | |
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parents:
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202 ACCESSKEY="N" |
0 | 203 >Next</A |
204 ></TD | |
205 ></TR | |
206 ><TR | |
207 ><TD | |
208 WIDTH="33%" | |
209 ALIGN="left" | |
210 VALIGN="top" | |
211 >SDL_MapRGBA</TD | |
212 ><TD | |
213 WIDTH="34%" | |
214 ALIGN="center" | |
215 VALIGN="top" | |
216 ><A | |
217 HREF="video.html" | |
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parents:
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218 ACCESSKEY="U" |
0 | 219 >Up</A |
220 ></TD | |
221 ><TD | |
222 WIDTH="33%" | |
223 ALIGN="right" | |
224 VALIGN="top" | |
225 >SDL_GetRGBA</TD | |
226 ></TR | |
227 ></TABLE | |
228 ></DIV | |
229 ></BODY | |
230 ></HTML | |
231 > |