Mercurial > sdl-ios-xcode
annotate docs/html/sdlgetrgba.html @ 3261:72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
The linux code appears to be complete and *should* be the base of all Unix and GCC based versions. The macosx and win32 versions
are currently just copies of the dummy code. I will begin working on the windows version as soon as this check in is done. I
need someone to work on the Mac OS X version.
I'm afraid that this check in will break QNX (Sorry!)
| author | Bob Pendleton <bob@pendleton.com> |
|---|---|
| date | Thu, 17 Sep 2009 20:35:12 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_GetRGBA</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_GetRGB" | |
| 17 HREF="sdlgetrgb.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_CreateRGBSurface" | |
| 20 HREF="sdlcreatergbsurface.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="sdlgetrgb.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="sdlcreatergbsurface.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="SDLGETRGBA" | |
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74 ></A |
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75 >SDL_GetRGBA</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN1747" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_GetRGBA -- Get RGBA values from a pixel in the specified pixel format.</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSYNOPSISDIV" | |
| 86 ><A | |
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87 NAME="AEN1750" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Synopsis</H2 | |
| 91 ><DIV | |
| 92 CLASS="FUNCSYNOPSIS" | |
| 93 ><A | |
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94 NAME="AEN1751" |
| 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_GetRGBA</B | |
| 108 ></CODE | |
| 109 >(Uint32 pixel, SDL_PixelFormat *fmt, Uint8 *r, Uint8 *g, Uint8 *b, Uint8 *a);</CODE | |
| 110 ></P | |
| 111 ><P | |
| 112 ></P | |
| 113 ></DIV | |
| 114 ></DIV | |
| 115 ><DIV | |
| 116 CLASS="REFSECT1" | |
| 117 ><A | |
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118 NAME="AEN1757" |
| 0 | 119 ></A |
| 120 ><H2 | |
| 121 >Description</H2 | |
| 122 ><P | |
| 123 >Get RGBA 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 ><P | |
| 130 >If the surface has no alpha component, the alpha will be returned as 0xff | |
| 131 (100% opaque).</P | |
| 132 ></DIV | |
| 133 ><DIV | |
| 134 CLASS="REFSECT1" | |
| 135 ><A | |
|
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136 NAME="AEN1762" |
| 0 | 137 ></A |
| 138 ><H2 | |
| 139 >See Also</H2 | |
| 140 ><P | |
| 141 ><A | |
| 142 HREF="sdlgetrgb.html" | |
| 143 >SDL_GetRGB</A | |
| 144 >, | |
| 145 <A | |
| 146 HREF="sdlmaprgb.html" | |
| 147 >SDL_MapRGB</A | |
| 148 >, | |
| 149 <A | |
| 150 HREF="sdlmaprgba.html" | |
| 151 >SDL_MapRGBA</A | |
| 152 >, | |
| 153 <A | |
| 154 HREF="sdlpixelformat.html" | |
| 155 >SDL_PixelFormat</A | |
| 156 ></P | |
| 157 ></DIV | |
| 158 ><DIV | |
| 159 CLASS="NAVFOOTER" | |
| 160 ><HR | |
| 161 ALIGN="LEFT" | |
| 162 WIDTH="100%"><TABLE | |
|
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163 SUMMARY="Footer navigation table" |
| 0 | 164 WIDTH="100%" |
| 165 BORDER="0" | |
| 166 CELLPADDING="0" | |
| 167 CELLSPACING="0" | |
| 168 ><TR | |
| 169 ><TD | |
| 170 WIDTH="33%" | |
| 171 ALIGN="left" | |
| 172 VALIGN="top" | |
| 173 ><A | |
| 174 HREF="sdlgetrgb.html" | |
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803
355632dca928
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Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
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175 ACCESSKEY="P" |
| 0 | 176 >Prev</A |
| 177 ></TD | |
| 178 ><TD | |
| 179 WIDTH="34%" | |
| 180 ALIGN="center" | |
| 181 VALIGN="top" | |
| 182 ><A | |
| 183 HREF="index.html" | |
|
803
355632dca928
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parents:
181
diff
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184 ACCESSKEY="H" |
| 0 | 185 >Home</A |
| 186 ></TD | |
| 187 ><TD | |
| 188 WIDTH="33%" | |
| 189 ALIGN="right" | |
| 190 VALIGN="top" | |
| 191 ><A | |
| 192 HREF="sdlcreatergbsurface.html" | |
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803
355632dca928
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Sam Lantinga <slouken@libsdl.org>
parents:
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193 ACCESSKEY="N" |
| 0 | 194 >Next</A |
| 195 ></TD | |
| 196 ></TR | |
| 197 ><TR | |
| 198 ><TD | |
| 199 WIDTH="33%" | |
| 200 ALIGN="left" | |
| 201 VALIGN="top" | |
| 202 >SDL_GetRGB</TD | |
| 203 ><TD | |
| 204 WIDTH="34%" | |
| 205 ALIGN="center" | |
| 206 VALIGN="top" | |
| 207 ><A | |
| 208 HREF="video.html" | |
|
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355632dca928
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parents:
181
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209 ACCESSKEY="U" |
| 0 | 210 >Up</A |
| 211 ></TD | |
| 212 ><TD | |
| 213 WIDTH="33%" | |
| 214 ALIGN="right" | |
| 215 VALIGN="top" | |
| 216 >SDL_CreateRGBSurface</TD | |
| 217 ></TR | |
| 218 ></TABLE | |
| 219 ></DIV | |
| 220 ></BODY | |
| 221 ></HTML | |
| 222 > |