Mercurial > sdl-ios-xcode
annotate docs/html/sdlcreatergbsurfacefrom.html @ 270:37fa1484f71b
From: "Mattias Engdeg�rd" <f91-men@nada.kth.se>
To: slouken@devolution.com
Subject: Re: [SDL] Question about SDL_FillRect()
I benchmarked with and without clipping UpdateRects and was unable to find
any difference on my moderately slow machine. Anyway, I haven't added
clipping in this patch, but fixed a couple of bugs and generally cleaned
up some of the X11 image code. Most importantly, UpdateRects now checks
for both zero height and width. Also, I eliminated the entire code to
byteswap X11 images since X11 can do that automatically if you ask it
nicely :-)
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 18 Jan 2002 22:02:03 +0000 |
| parents | e5bc29de3f0a |
| children | 355632dca928 |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_CreateRGBSurfaceFrom</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_CreateRGBSurface" | |
| 17 HREF="sdlcreatergbsurface.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_FreeSurface" | |
| 20 HREF="sdlfreesurface.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="sdlcreatergbsurface.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="sdlfreesurface.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="SDLCREATERGBSURFACEFROM" | |
| 71 >SDL_CreateRGBSurfaceFrom</A | |
| 72 ></H1 | |
| 73 ><DIV | |
| 74 CLASS="REFNAMEDIV" | |
| 75 ><A | |
|
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76 NAME="AEN1472" |
| 0 | 77 ></A |
| 78 ><H2 | |
| 79 >Name</H2 | |
| 80 >SDL_CreateRGBSurfaceFrom -- Create an SDL_Surface from pixel data</DIV | |
| 81 ><DIV | |
| 82 CLASS="REFSYNOPSISDIV" | |
| 83 ><A | |
|
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84 NAME="AEN1475" |
| 0 | 85 ></A |
| 86 ><H2 | |
| 87 >Synopsis</H2 | |
| 88 ><DIV | |
| 89 CLASS="FUNCSYNOPSIS" | |
| 90 ><A | |
|
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91 NAME="AEN1476" |
| 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 >SDL_Surface *<B | |
| 103 CLASS="FSFUNC" | |
| 104 >SDL_CreateRGBSurfaceFrom</B | |
| 105 ></CODE | |
| 106 >(void *pixels, int width, int height, int depth, int pitch, Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask);</CODE | |
| 107 ></P | |
| 108 ><P | |
| 109 ></P | |
| 110 ></DIV | |
| 111 ></DIV | |
| 112 ><DIV | |
| 113 CLASS="REFSECT1" | |
| 114 ><A | |
|
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115 NAME="AEN1482" |
| 0 | 116 ></A |
| 117 ><H2 | |
| 118 >Description</H2 | |
| 119 ><P | |
| 120 >Creates an SDL_Surface from the provided pixel data.</P | |
| 121 ><P | |
| 122 >The data stored in <TT | |
| 123 CLASS="PARAMETER" | |
| 124 ><I | |
| 125 >pixels</I | |
| 126 ></TT | |
| 127 > is assumed to be of the <TT | |
| 128 CLASS="PARAMETER" | |
| 129 ><I | |
| 130 >depth</I | |
| 131 ></TT | |
| 132 > specified in the parameter list. The pixel data is not copied into the <SPAN | |
| 133 CLASS="STRUCTNAME" | |
| 134 >SDL_Surface</SPAN | |
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135 > structure so it should not be freed until the surface has been freed with a called to <A |
| 0 | 136 HREF="sdlfreesurface.html" |
| 137 >SDL_FreeSurface</A | |
| 138 >. <TT | |
| 139 CLASS="PARAMETER" | |
| 140 ><I | |
| 141 >pitch</I | |
| 142 ></TT | |
| 143 > is the length of each scanline in bytes. </P | |
| 144 ><P | |
| 145 >See <A | |
| 146 HREF="sdlcreatergbsurface.html" | |
| 147 ><TT | |
| 148 CLASS="FUNCTION" | |
| 149 >SDL_CreateRGBSurface</TT | |
| 150 ></A | |
| 151 > for a more detailed description of the other parameters.</P | |
| 152 ></DIV | |
| 153 ><DIV | |
| 154 CLASS="REFSECT1" | |
| 155 ><A | |
|
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156 NAME="AEN1494" |
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157 ></A |
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158 ><H2 |
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159 >Return Value</H2 |
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160 ><P |
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161 >Returns the created surface, or <SPAN |
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162 CLASS="RETURNVALUE" |
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163 >NULL</SPAN |
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164 > upon error.</P |
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165 ></DIV |
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166 ><DIV |
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167 CLASS="REFSECT1" |
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168 ><A |
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169 NAME="AEN1498" |
| 0 | 170 ></A |
| 171 ><H2 | |
| 172 >See Also</H2 | |
| 173 ><P | |
| 174 ><A | |
| 175 HREF="sdlcreatergbsurface.html" | |
| 176 ><TT | |
| 177 CLASS="FUNCTION" | |
| 178 >SDL_CreateRGBSurface</TT | |
| 179 ></A | |
| 180 >, | |
| 181 <A | |
| 182 HREF="sdlfreesurface.html" | |
| 183 ><TT | |
| 184 CLASS="FUNCTION" | |
| 185 >SDL_FreeSurface</TT | |
| 186 ></A | |
| 187 ></P | |
| 188 ></DIV | |
| 189 ><DIV | |
| 190 CLASS="NAVFOOTER" | |
| 191 ><HR | |
| 192 ALIGN="LEFT" | |
| 193 WIDTH="100%"><TABLE | |
| 194 WIDTH="100%" | |
| 195 BORDER="0" | |
| 196 CELLPADDING="0" | |
| 197 CELLSPACING="0" | |
| 198 ><TR | |
| 199 ><TD | |
| 200 WIDTH="33%" | |
| 201 ALIGN="left" | |
| 202 VALIGN="top" | |
| 203 ><A | |
| 204 HREF="sdlcreatergbsurface.html" | |
| 205 >Prev</A | |
| 206 ></TD | |
| 207 ><TD | |
| 208 WIDTH="34%" | |
| 209 ALIGN="center" | |
| 210 VALIGN="top" | |
| 211 ><A | |
| 212 HREF="index.html" | |
| 213 >Home</A | |
| 214 ></TD | |
| 215 ><TD | |
| 216 WIDTH="33%" | |
| 217 ALIGN="right" | |
| 218 VALIGN="top" | |
| 219 ><A | |
| 220 HREF="sdlfreesurface.html" | |
| 221 >Next</A | |
| 222 ></TD | |
| 223 ></TR | |
| 224 ><TR | |
| 225 ><TD | |
| 226 WIDTH="33%" | |
| 227 ALIGN="left" | |
| 228 VALIGN="top" | |
| 229 >SDL_CreateRGBSurface</TD | |
| 230 ><TD | |
| 231 WIDTH="34%" | |
| 232 ALIGN="center" | |
| 233 VALIGN="top" | |
| 234 ><A | |
| 235 HREF="video.html" | |
| 236 >Up</A | |
| 237 ></TD | |
| 238 ><TD | |
| 239 WIDTH="33%" | |
| 240 ALIGN="right" | |
| 241 VALIGN="top" | |
| 242 >SDL_FreeSurface</TD | |
| 243 ></TR | |
| 244 ></TABLE | |
| 245 ></DIV | |
| 246 ></BODY | |
| 247 ></HTML | |
| 248 > |