Mercurial > sdl-ios-xcode
annotate docs/html/sdllistmodes.html @ 3335:b8d313de8a65
Adam Strzelecki to SDL
Since current DirectFB implementation is incomplete for YUV surfaces (actually causes segmentation faults when trying Lock and use YUV planar textures) I decided to fix it a bit.
Here's a patch that should make DirectFB properly support YUV both packed and planar (3 planes).
(1) Removed SDL_BYTESPERPIXEL at all in favor of DFB_BYTES_PER_PIXEL(SDLToDFBPixelFormat(fmt)) which does return always proper BPP for YUVs too, coz SDL_BYTESPERPIXEL returns incorrect values for FOURCCs
(2) Fixed data->pixels allocation for planar YUVs in CreateTexture, it should allocate 150% more space
(3) Copy other planes for planar YUVs in UpdateTexture
(4) Moved checking if format is supported at all with DirectFB on CreateTexture at the beginning of the code
Waiting for comments,
--
Adam Strzelecki | nanoant.com
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 04 Oct 2009 04:03:37 +0000 |
| parents | 355632dca928 |
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| rev | line source |
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| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_ListModes</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_VideoDriverName" | |
| 17 HREF="sdlvideodrivername.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_VideoModeOK" | |
| 20 HREF="sdlvideomodeok.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="sdlvideodrivername.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="sdlvideomodeok.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="SDLLISTMODES" | |
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74 ></A |
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75 >SDL_ListModes</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN1159" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_ListModes -- Returns a pointer to an array of available screen dimensions for | |
| 84 the given format and video flags</DIV | |
| 85 ><DIV | |
| 86 CLASS="REFSYNOPSISDIV" | |
| 87 ><A | |
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88 NAME="AEN1162" |
| 0 | 89 ></A |
| 90 ><H2 | |
| 91 >Synopsis</H2 | |
| 92 ><DIV | |
| 93 CLASS="FUNCSYNOPSIS" | |
| 94 ><A | |
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95 NAME="AEN1163" |
| 0 | 96 ></A |
| 97 ><P | |
| 98 ></P | |
| 99 ><PRE | |
| 100 CLASS="FUNCSYNOPSISINFO" | |
| 101 >#include "SDL.h"</PRE | |
| 102 ><P | |
| 103 ><CODE | |
| 104 ><CODE | |
| 105 CLASS="FUNCDEF" | |
| 106 >SDL_Rect **<B | |
| 107 CLASS="FSFUNC" | |
| 108 >SDL_ListModes</B | |
| 109 ></CODE | |
| 110 >(SDL_PixelFormat *format, Uint32 flags);</CODE | |
| 111 ></P | |
| 112 ><P | |
| 113 ></P | |
| 114 ></DIV | |
| 115 ></DIV | |
| 116 ><DIV | |
| 117 CLASS="REFSECT1" | |
| 118 ><A | |
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119 NAME="AEN1169" |
| 0 | 120 ></A |
| 121 ><H2 | |
| 122 >Description</H2 | |
| 123 ><P | |
| 124 >Return a pointer to an array of available screen dimensions for the given | |
| 125 format and video flags, sorted largest to smallest. Returns | |
| 126 <TT | |
| 127 CLASS="LITERAL" | |
| 128 >NULL</TT | |
| 129 > if there are no dimensions available for a particular | |
| 130 format, or <SPAN | |
| 131 CLASS="RETURNVALUE" | |
| 132 >-1</SPAN | |
| 133 > if any dimension is okay for | |
| 134 the given format.</P | |
| 135 ><P | |
| 136 >If <TT | |
| 137 CLASS="PARAMETER" | |
| 138 ><I | |
| 139 >format</I | |
| 140 ></TT | |
| 141 > is <TT | |
| 142 CLASS="LITERAL" | |
| 143 >NULL</TT | |
| 144 >, the mode list | |
| 145 will be for the format returned by <A | |
| 146 HREF="sdlgetvideoinfo.html" | |
| 147 >SDL_GetVideoInfo()</A | |
| 148 >-><TT | |
| 149 CLASS="STRUCTFIELD" | |
| 150 ><I | |
| 151 >vfmt</I | |
| 152 ></TT | |
| 153 >. The <TT | |
| 154 CLASS="PARAMETER" | |
| 155 ><I | |
| 156 >flag</I | |
| 157 ></TT | |
| 158 > parameter is an OR'd combination of <A | |
| 159 HREF="sdlsurface.html" | |
| 160 >surface</A | |
| 161 > flags. The flags are the same as those used <A | |
| 162 HREF="sdlsetvideomode.html" | |
| 163 ><TT | |
| 164 CLASS="FUNCTION" | |
| 165 >SDL_SetVideoMode</TT | |
| 166 ></A | |
| 167 > and they play a strong role in deciding what modes are valid. For instance, if you pass <TT | |
| 168 CLASS="LITERAL" | |
| 169 >SDL_HWSURFACE</TT | |
| 170 > as a flag only modes that support hardware video surfaces will be returned.</P | |
| 171 ></DIV | |
| 172 ><DIV | |
| 173 CLASS="REFSECT1" | |
| 174 ><A | |
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175 NAME="AEN1184" |
| 0 | 176 ></A |
| 177 ><H2 | |
| 178 >Example</H2 | |
| 179 ><PRE | |
| 180 CLASS="PROGRAMLISTING" | |
| 181 >SDL_Rect **modes; | |
| 182 int i; | |
| 183 . | |
| 184 . | |
| 185 . | |
| 186 | |
| 187 /* Get available fullscreen/hardware modes */ | |
| 188 modes=SDL_ListModes(NULL, SDL_FULLSCREEN|SDL_HWSURFACE); | |
| 189 | |
| 190 /* Check is there are any modes available */ | |
| 191 if(modes == (SDL_Rect **)0){ | |
| 192 printf("No modes available!\n"); | |
| 193 exit(-1); | |
| 194 } | |
| 195 | |
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196 /* Check if our resolution is restricted */ |
| 0 | 197 if(modes == (SDL_Rect **)-1){ |
| 198 printf("All resolutions available.\n"); | |
| 199 } | |
| 200 else{ | |
| 201 /* Print valid modes */ | |
| 202 printf("Available Modes\n"); | |
| 203 for(i=0;modes[i];++i) | |
| 204 printf(" %d x %d\n", modes[i]->w, modes[i]->h); | |
| 205 } | |
| 206 . | |
| 207 .</PRE | |
| 208 ></DIV | |
| 209 ><DIV | |
| 210 CLASS="REFSECT1" | |
| 211 ><A | |
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212 NAME="AEN1187" |
| 0 | 213 ></A |
| 214 ><H2 | |
| 215 >See Also</H2 | |
| 216 ><P | |
| 217 ><A | |
| 218 HREF="sdlsetvideomode.html" | |
| 219 ><TT | |
| 220 CLASS="FUNCTION" | |
| 221 >SDL_SetVideoMode</TT | |
| 222 ></A | |
| 223 >, | |
| 224 <A | |
| 225 HREF="sdlgetvideoinfo.html" | |
| 226 ><TT | |
| 227 CLASS="FUNCTION" | |
| 228 >SDL_GetVideoInfo</TT | |
| 229 ></A | |
| 230 >, | |
| 231 <A | |
| 232 HREF="sdlrect.html" | |
| 233 ><SPAN | |
| 234 CLASS="STRUCTNAME" | |
| 235 >SDL_Rect</SPAN | |
| 236 ></A | |
| 237 >, | |
| 238 <A | |
| 239 HREF="sdlpixelformat.html" | |
| 240 ><SPAN | |
| 241 CLASS="STRUCTNAME" | |
| 242 >SDL_PixelFormat</SPAN | |
| 243 ></A | |
| 244 ></P | |
| 245 ></DIV | |
| 246 ><DIV | |
| 247 CLASS="NAVFOOTER" | |
| 248 ><HR | |
| 249 ALIGN="LEFT" | |
| 250 WIDTH="100%"><TABLE | |
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251 SUMMARY="Footer navigation table" |
| 0 | 252 WIDTH="100%" |
| 253 BORDER="0" | |
| 254 CELLPADDING="0" | |
| 255 CELLSPACING="0" | |
| 256 ><TR | |
| 257 ><TD | |
| 258 WIDTH="33%" | |
| 259 ALIGN="left" | |
| 260 VALIGN="top" | |
| 261 ><A | |
| 262 HREF="sdlvideodrivername.html" | |
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263 ACCESSKEY="P" |
| 0 | 264 >Prev</A |
| 265 ></TD | |
| 266 ><TD | |
| 267 WIDTH="34%" | |
| 268 ALIGN="center" | |
| 269 VALIGN="top" | |
| 270 ><A | |
| 271 HREF="index.html" | |
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272 ACCESSKEY="H" |
| 0 | 273 >Home</A |
| 274 ></TD | |
| 275 ><TD | |
| 276 WIDTH="33%" | |
| 277 ALIGN="right" | |
| 278 VALIGN="top" | |
| 279 ><A | |
| 280 HREF="sdlvideomodeok.html" | |
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281 ACCESSKEY="N" |
| 0 | 282 >Next</A |
| 283 ></TD | |
| 284 ></TR | |
| 285 ><TR | |
| 286 ><TD | |
| 287 WIDTH="33%" | |
| 288 ALIGN="left" | |
| 289 VALIGN="top" | |
| 290 >SDL_VideoDriverName</TD | |
| 291 ><TD | |
| 292 WIDTH="34%" | |
| 293 ALIGN="center" | |
| 294 VALIGN="top" | |
| 295 ><A | |
| 296 HREF="video.html" | |
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297 ACCESSKEY="U" |
| 0 | 298 >Up</A |
| 299 ></TD | |
| 300 ><TD | |
| 301 WIDTH="33%" | |
| 302 ALIGN="right" | |
| 303 VALIGN="top" | |
| 304 >SDL_VideoModeOK</TD | |
| 305 ></TR | |
| 306 ></TABLE | |
| 307 ></DIV | |
| 308 ></BODY | |
| 309 ></HTML | |
| 310 > |