Mercurial > sdl-ios-xcode
annotate docs/html/sdloverlay.html @ 136:717f739d6ec1
Added hardware stretching code to scale 640x480 to TV resolution
There's a bug of some kind in the 16bpp code. ??
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 01 Aug 2001 08:41:45 +0000 |
| parents | 55f1f1b3e27d |
| children | e5bc29de3f0a |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_Overlay</TITLE | |
| 5 ><META | |
| 6 NAME="GENERATOR" | |
|
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55f1f1b3e27d
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changeset
|
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_VideoInfo" | |
| 17 HREF="sdlvideoinfo.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="Window Management" | |
| 20 HREF="wm.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="sdlvideoinfo.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="wm.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="SDLOVERLAY" | |
| 71 >SDL_Overlay</A | |
| 72 ></H1 | |
| 73 ><DIV | |
| 74 CLASS="REFNAMEDIV" | |
| 75 ><A | |
|
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55f1f1b3e27d
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Sam Lantinga <slouken@lokigames.com>
parents:
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diff
changeset
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76 NAME="AEN3042" |
| 0 | 77 ></A |
| 78 ><H2 | |
| 79 >Name</H2 | |
| 80 >SDL_Overlay -- YUV video overlay</DIV | |
| 81 ><DIV | |
| 82 CLASS="REFSECT1" | |
| 83 ><A | |
|
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55f1f1b3e27d
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Sam Lantinga <slouken@lokigames.com>
parents:
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diff
changeset
|
84 NAME="AEN3045" |
| 0 | 85 ></A |
| 86 ><H2 | |
| 87 >Structure Definition</H2 | |
| 88 ><PRE | |
| 89 CLASS="PROGRAMLISTING" | |
| 90 >typedef struct{ | |
| 91 Uint32 format; | |
| 92 int w, h; | |
| 93 int planes; | |
| 94 Uint16 *pitches; | |
| 95 Uint8 **pixels; | |
| 96 Uint32 hw_overlay:1; | |
| 97 } SDL_Overlay;</PRE | |
| 98 ></DIV | |
| 99 ><DIV | |
| 100 CLASS="REFSECT1" | |
| 101 ><A | |
|
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55f1f1b3e27d
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Sam Lantinga <slouken@lokigames.com>
parents:
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diff
changeset
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102 NAME="AEN3048" |
| 0 | 103 ></A |
| 104 ><H2 | |
| 105 >Structure Data</H2 | |
| 106 ><DIV | |
| 107 CLASS="INFORMALTABLE" | |
| 108 ><A | |
|
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55f1f1b3e27d
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Sam Lantinga <slouken@lokigames.com>
parents:
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diff
changeset
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109 NAME="AEN3050" |
| 0 | 110 ></A |
| 111 ><P | |
| 112 ></P | |
| 113 ><TABLE | |
| 114 BORDER="0" | |
| 115 CLASS="CALSTABLE" | |
| 116 ><TBODY | |
| 117 ><TR | |
| 118 ><TD | |
| 119 ALIGN="LEFT" | |
| 120 VALIGN="TOP" | |
| 121 ><TT | |
| 122 CLASS="STRUCTFIELD" | |
| 123 ><I | |
| 124 >format</I | |
| 125 ></TT | |
| 126 ></TD | |
| 127 ><TD | |
| 128 ALIGN="LEFT" | |
| 129 VALIGN="TOP" | |
| 130 >Overlay format (see below)</TD | |
| 131 ></TR | |
| 132 ><TR | |
| 133 ><TD | |
| 134 ALIGN="LEFT" | |
| 135 VALIGN="TOP" | |
| 136 ><TT | |
| 137 CLASS="STRUCTFIELD" | |
| 138 ><I | |
| 139 >w, h</I | |
| 140 ></TT | |
| 141 ></TD | |
| 142 ><TD | |
| 143 ALIGN="LEFT" | |
| 144 VALIGN="TOP" | |
| 145 >Width and height of overlay</TD | |
| 146 ></TR | |
| 147 ><TR | |
| 148 ><TD | |
| 149 ALIGN="LEFT" | |
| 150 VALIGN="TOP" | |
| 151 ><TT | |
| 152 CLASS="STRUCTFIELD" | |
| 153 ><I | |
| 154 >planes</I | |
| 155 ></TT | |
| 156 ></TD | |
| 157 ><TD | |
| 158 ALIGN="LEFT" | |
| 159 VALIGN="TOP" | |
| 160 >Number of planes in the overlay. Usually either 1 or 3</TD | |
| 161 ></TR | |
| 162 ><TR | |
| 163 ><TD | |
| 164 ALIGN="LEFT" | |
| 165 VALIGN="TOP" | |
| 166 ><TT | |
| 167 CLASS="STRUCTFIELD" | |
| 168 ><I | |
| 169 >pitches</I | |
| 170 ></TT | |
| 171 ></TD | |
| 172 ><TD | |
| 173 ALIGN="LEFT" | |
| 174 VALIGN="TOP" | |
| 175 >An array of pitches, one for each plane. Pitch is the length of a row in bytes.</TD | |
| 176 ></TR | |
| 177 ><TR | |
| 178 ><TD | |
| 179 ALIGN="LEFT" | |
| 180 VALIGN="TOP" | |
| 181 ><TT | |
| 182 CLASS="STRUCTFIELD" | |
| 183 ><I | |
| 184 >pixels</I | |
| 185 ></TT | |
| 186 ></TD | |
| 187 ><TD | |
| 188 ALIGN="LEFT" | |
| 189 VALIGN="TOP" | |
| 190 >An array of pointers to teh data of each plane. The overlay should be locked before these pointers are used.</TD | |
| 191 ></TR | |
| 192 ><TR | |
| 193 ><TD | |
| 194 ALIGN="LEFT" | |
| 195 VALIGN="TOP" | |
| 196 ><TT | |
| 197 CLASS="STRUCTFIELD" | |
| 198 ><I | |
| 199 >hw_overlay</I | |
| 200 ></TT | |
| 201 ></TD | |
| 202 ><TD | |
| 203 ALIGN="LEFT" | |
| 204 VALIGN="TOP" | |
| 205 >This will be set to 1 if the overlay is hardware accelerated.</TD | |
| 206 ></TR | |
| 207 ></TBODY | |
| 208 ></TABLE | |
| 209 ><P | |
| 210 ></P | |
| 211 ></DIV | |
| 212 ></DIV | |
| 213 ><DIV | |
| 214 CLASS="REFSECT1" | |
| 215 ><A | |
|
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55f1f1b3e27d
Added new docs for SDL 1.2.1
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
216 NAME="AEN3077" |
| 0 | 217 ></A |
| 218 ><H2 | |
| 219 >Description</H2 | |
| 220 ><P | |
| 221 >A <SPAN | |
| 222 CLASS="STRUCTNAME" | |
| 223 >SDL_Overlay</SPAN | |
| 224 > is similar to a <A | |
| 225 HREF="sdlsurface.html" | |
| 226 ><SPAN | |
| 227 CLASS="STRUCTNAME" | |
| 228 >SDL_Surface</SPAN | |
| 229 ></A | |
| 230 > except it stores a YUV overlay. All the fields are read only, except for <TT | |
| 231 CLASS="STRUCTFIELD" | |
| 232 ><I | |
| 233 >pixels</I | |
| 234 ></TT | |
| 235 > which should be <A | |
| 236 HREF="sdllockyuvoverlay.html" | |
| 237 >locked</A | |
| 238 > before use. The <TT | |
| 239 CLASS="STRUCTFIELD" | |
| 240 ><I | |
| 241 >format</I | |
| 242 ></TT | |
| 243 > field stores the format of the overlay which is one of the following: | |
| 244 <PRE | |
| 245 CLASS="PROGRAMLISTING" | |
| 246 >#define SDL_YV12_OVERLAY 0x32315659 /* Planar mode: Y + V + U */ | |
| 247 #define SDL_IYUV_OVERLAY 0x56555949 /* Planar mode: Y + U + V */ | |
| 248 #define SDL_YUY2_OVERLAY 0x32595559 /* Packed mode: Y0+U0+Y1+V0 */ | |
| 249 #define SDL_UYVY_OVERLAY 0x59565955 /* Packed mode: U0+Y0+V0+Y1 */ | |
| 250 #define SDL_YVYU_OVERLAY 0x55595659 /* Packed mode: Y0+V0+Y1+U0 */</PRE | |
| 251 > | |
| 252 More information on YUV formats can be found at <A | |
| 253 HREF="http://www.webartz.com/fourcc/indexyuv.htm" | |
| 254 TARGET="_top" | |
| 255 >http://www.webartz.com/fourcc/indexyuv.htm</A | |
| 256 >.</P | |
| 257 ></DIV | |
| 258 ><DIV | |
| 259 CLASS="REFSECT1" | |
| 260 ><A | |
|
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parents:
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diff
changeset
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261 NAME="AEN3088" |
| 0 | 262 ></A |
| 263 ><H2 | |
| 264 >See Also</H2 | |
| 265 ><P | |
| 266 ><A | |
| 267 HREF="sdlcreateyuvoverlay.html" | |
| 268 ><TT | |
| 269 CLASS="FUNCTION" | |
| 270 >SDL_CreateYUVOverlay</TT | |
| 271 ></A | |
| 272 >, | |
| 273 <A | |
| 274 HREF="sdllockyuvoverlay.html" | |
| 275 ><TT | |
| 276 CLASS="FUNCTION" | |
| 277 >SDL_LockYUVOverlay</TT | |
| 278 ></A | |
| 279 >, | |
| 280 <A | |
| 281 HREF="sdlunlockyuvoverlay.html" | |
| 282 ><TT | |
| 283 CLASS="FUNCTION" | |
| 284 >SDL_UnlockYUVOverlay</TT | |
| 285 ></A | |
| 286 >, | |
| 287 <A | |
| 288 HREF="sdlfreeyuvoverlay.html" | |
| 289 ><TT | |
| 290 CLASS="FUNCTION" | |
| 291 >SDL_FreeYUVOverlay</TT | |
| 292 ></A | |
| 293 ></P | |
| 294 ></DIV | |
| 295 ><DIV | |
| 296 CLASS="NAVFOOTER" | |
| 297 ><HR | |
| 298 ALIGN="LEFT" | |
| 299 WIDTH="100%"><TABLE | |
| 300 WIDTH="100%" | |
| 301 BORDER="0" | |
| 302 CELLPADDING="0" | |
| 303 CELLSPACING="0" | |
| 304 ><TR | |
| 305 ><TD | |
| 306 WIDTH="33%" | |
| 307 ALIGN="left" | |
| 308 VALIGN="top" | |
| 309 ><A | |
| 310 HREF="sdlvideoinfo.html" | |
| 311 >Prev</A | |
| 312 ></TD | |
| 313 ><TD | |
| 314 WIDTH="34%" | |
| 315 ALIGN="center" | |
| 316 VALIGN="top" | |
| 317 ><A | |
| 318 HREF="index.html" | |
| 319 >Home</A | |
| 320 ></TD | |
| 321 ><TD | |
| 322 WIDTH="33%" | |
| 323 ALIGN="right" | |
| 324 VALIGN="top" | |
| 325 ><A | |
| 326 HREF="wm.html" | |
| 327 >Next</A | |
| 328 ></TD | |
| 329 ></TR | |
| 330 ><TR | |
| 331 ><TD | |
| 332 WIDTH="33%" | |
| 333 ALIGN="left" | |
| 334 VALIGN="top" | |
| 335 >SDL_VideoInfo</TD | |
| 336 ><TD | |
| 337 WIDTH="34%" | |
| 338 ALIGN="center" | |
| 339 VALIGN="top" | |
| 340 ><A | |
| 341 HREF="video.html" | |
| 342 >Up</A | |
| 343 ></TD | |
| 344 ><TD | |
| 345 WIDTH="33%" | |
| 346 ALIGN="right" | |
| 347 VALIGN="top" | |
| 348 >Window Management</TD | |
| 349 ></TR | |
| 350 ></TABLE | |
| 351 ></DIV | |
| 352 ></BODY | |
| 353 ></HTML | |
| 354 > |