Mercurial > sdl-ios-xcode
annotate docs/html/sdlgetrgba.html @ 571:8e3ce997621c
Date: Thu, 16 Jan 2003 13:48:31 +0200
From: "Mike Gorchak"
Subject: All QNX patches
whole patches concerning QNX. Almost all code has been rewritten by Julian
and me. Added initial support for hw overlays in QNX and many many others
fixes.
P.S. This patches has been reviewed by Dave Rempel from QSSL and included in
SDL 1.2.5 distribution, which coming on 3rd party CD for newest 6.2.1
version of QNX, which will be available soon.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 20 Jan 2003 01:38:37 +0000 |
| parents | e5bc29de3f0a |
| children | 355632dca928 |
| 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 1.64 |
| 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 | |
| 31 WIDTH="100%" | |
| 32 BORDER="0" | |
| 33 CELLPADDING="0" | |
| 34 CELLSPACING="0" | |
| 35 ><TR | |
| 36 ><TH | |
| 37 COLSPAN="3" | |
| 38 ALIGN="center" | |
| 39 >SDL Library Documentation</TH | |
| 40 ></TR | |
| 41 ><TR | |
| 42 ><TD | |
| 43 WIDTH="10%" | |
| 44 ALIGN="left" | |
| 45 VALIGN="bottom" | |
| 46 ><A | |
| 47 HREF="sdlgetrgb.html" | |
| 48 >Prev</A | |
| 49 ></TD | |
| 50 ><TD | |
| 51 WIDTH="80%" | |
| 52 ALIGN="center" | |
| 53 VALIGN="bottom" | |
| 54 ></TD | |
| 55 ><TD | |
| 56 WIDTH="10%" | |
| 57 ALIGN="right" | |
| 58 VALIGN="bottom" | |
| 59 ><A | |
| 60 HREF="sdlcreatergbsurface.html" | |
| 61 >Next</A | |
| 62 ></TD | |
| 63 ></TR | |
| 64 ></TABLE | |
| 65 ><HR | |
| 66 ALIGN="LEFT" | |
| 67 WIDTH="100%"></DIV | |
| 68 ><H1 | |
| 69 ><A | |
| 70 NAME="SDLGETRGBA" | |
| 71 >SDL_GetRGBA</A | |
| 72 ></H1 | |
| 73 ><DIV | |
| 74 CLASS="REFNAMEDIV" | |
| 75 ><A | |
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76 NAME="AEN1363" |
| 0 | 77 ></A |
| 78 ><H2 | |
| 79 >Name</H2 | |
| 80 >SDL_GetRGBA -- Get RGBA values from a pixel in the specified pixel format.</DIV | |
| 81 ><DIV | |
| 82 CLASS="REFSYNOPSISDIV" | |
| 83 ><A | |
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84 NAME="AEN1366" |
| 0 | 85 ></A |
| 86 ><H2 | |
| 87 >Synopsis</H2 | |
| 88 ><DIV | |
| 89 CLASS="FUNCSYNOPSIS" | |
| 90 ><A | |
|
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91 NAME="AEN1367" |
| 0 | 92 ></A |
| 93 ><P | |
| 94 ></P | |
| 95 ><PRE | |
| 96 CLASS="FUNCSYNOPSISINFO" | |
| 97 >#include "SDL.h"</PRE | |
| 98 ><P | |
| 99 ><CODE | |
| 100 ><CODE | |
| 101 CLASS="FUNCDEF" | |
| 102 >void <B | |
| 103 CLASS="FSFUNC" | |
| 104 >SDL_GetRGBA</B | |
| 105 ></CODE | |
| 106 >(Uint32 pixel, SDL_PixelFormat *fmt, Uint8 *r, Uint8 *g, Uint8 *b, Uint8 *a);</CODE | |
| 107 ></P | |
| 108 ><P | |
| 109 ></P | |
| 110 ></DIV | |
| 111 ></DIV | |
| 112 ><DIV | |
| 113 CLASS="REFSECT1" | |
| 114 ><A | |
|
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115 NAME="AEN1373" |
| 0 | 116 ></A |
| 117 ><H2 | |
| 118 >Description</H2 | |
| 119 ><P | |
| 120 >Get RGBA component values from a pixel stored in the specified pixel format.</P | |
| 121 ><P | |
| 122 >This function uses the entire 8-bit [0..255] range when converting color | |
| 123 components from pixel formats with less than 8-bits per RGB component | |
| 124 (e.g., a completely white pixel in 16-bit RGB565 format would return | |
| 125 [0xff, 0xff, 0xff] not [0xf8, 0xfc, 0xf8]).</P | |
| 126 ><P | |
| 127 >If the surface has no alpha component, the alpha will be returned as 0xff | |
| 128 (100% opaque).</P | |
| 129 ></DIV | |
| 130 ><DIV | |
| 131 CLASS="REFSECT1" | |
| 132 ><A | |
|
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133 NAME="AEN1378" |
| 0 | 134 ></A |
| 135 ><H2 | |
| 136 >See Also</H2 | |
| 137 ><P | |
| 138 ><A | |
| 139 HREF="sdlgetrgb.html" | |
| 140 >SDL_GetRGB</A | |
| 141 >, | |
| 142 <A | |
| 143 HREF="sdlmaprgb.html" | |
| 144 >SDL_MapRGB</A | |
| 145 >, | |
| 146 <A | |
| 147 HREF="sdlmaprgba.html" | |
| 148 >SDL_MapRGBA</A | |
| 149 >, | |
| 150 <A | |
| 151 HREF="sdlpixelformat.html" | |
| 152 >SDL_PixelFormat</A | |
| 153 ></P | |
| 154 ></DIV | |
| 155 ><DIV | |
| 156 CLASS="NAVFOOTER" | |
| 157 ><HR | |
| 158 ALIGN="LEFT" | |
| 159 WIDTH="100%"><TABLE | |
| 160 WIDTH="100%" | |
| 161 BORDER="0" | |
| 162 CELLPADDING="0" | |
| 163 CELLSPACING="0" | |
| 164 ><TR | |
| 165 ><TD | |
| 166 WIDTH="33%" | |
| 167 ALIGN="left" | |
| 168 VALIGN="top" | |
| 169 ><A | |
| 170 HREF="sdlgetrgb.html" | |
| 171 >Prev</A | |
| 172 ></TD | |
| 173 ><TD | |
| 174 WIDTH="34%" | |
| 175 ALIGN="center" | |
| 176 VALIGN="top" | |
| 177 ><A | |
| 178 HREF="index.html" | |
| 179 >Home</A | |
| 180 ></TD | |
| 181 ><TD | |
| 182 WIDTH="33%" | |
| 183 ALIGN="right" | |
| 184 VALIGN="top" | |
| 185 ><A | |
| 186 HREF="sdlcreatergbsurface.html" | |
| 187 >Next</A | |
| 188 ></TD | |
| 189 ></TR | |
| 190 ><TR | |
| 191 ><TD | |
| 192 WIDTH="33%" | |
| 193 ALIGN="left" | |
| 194 VALIGN="top" | |
| 195 >SDL_GetRGB</TD | |
| 196 ><TD | |
| 197 WIDTH="34%" | |
| 198 ALIGN="center" | |
| 199 VALIGN="top" | |
| 200 ><A | |
| 201 HREF="video.html" | |
| 202 >Up</A | |
| 203 ></TD | |
| 204 ><TD | |
| 205 WIDTH="33%" | |
| 206 ALIGN="right" | |
| 207 VALIGN="top" | |
| 208 >SDL_CreateRGBSurface</TD | |
| 209 ></TR | |
| 210 ></TABLE | |
| 211 ></DIV | |
| 212 ></BODY | |
| 213 ></HTML | |
| 214 > |