Mercurial > sdl-ios-xcode
annotate docs/html/video.html @ 2303:d87417504c75
First pass implementation of new SDL scancode concept, as discussed with
Christian Walther. Currently only implemented on Mac OS X for sanity
checking purposes.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 05 Feb 2008 07:19:23 +0000 |
| parents | 355632dca928 |
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| rev | line source |
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| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >Video</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="SDL Reference" | |
| 14 HREF="reference.html"><LINK | |
| 15 REL="PREVIOUS" | |
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16 TITLE="SDL_envvars" |
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17 HREF="sdlenvvars.html"><LINK |
| 0 | 18 REL="NEXT" |
| 19 TITLE="SDL_GetVideoSurface" | |
| 20 HREF="sdlgetvideosurface.html"><META | |
| 21 NAME="KEYWORD" | |
| 22 CONTENT="video"><META | |
| 23 NAME="KEYWORD" | |
| 24 CONTENT="function"></HEAD | |
| 25 ><BODY | |
| 26 CLASS="CHAPTER" | |
| 27 BGCOLOR="#FFF8DC" | |
| 28 TEXT="#000000" | |
| 29 LINK="#0000ee" | |
| 30 VLINK="#551a8b" | |
| 31 ALINK="#ff0000" | |
| 32 ><DIV | |
| 33 CLASS="NAVHEADER" | |
| 34 ><TABLE | |
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35 SUMMARY="Header navigation table" |
| 0 | 36 WIDTH="100%" |
| 37 BORDER="0" | |
| 38 CELLPADDING="0" | |
| 39 CELLSPACING="0" | |
| 40 ><TR | |
| 41 ><TH | |
| 42 COLSPAN="3" | |
| 43 ALIGN="center" | |
| 44 >SDL Library Documentation</TH | |
| 45 ></TR | |
| 46 ><TR | |
| 47 ><TD | |
| 48 WIDTH="10%" | |
| 49 ALIGN="left" | |
| 50 VALIGN="bottom" | |
| 51 ><A | |
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52 HREF="sdlenvvars.html" |
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53 ACCESSKEY="P" |
| 0 | 54 >Prev</A |
| 55 ></TD | |
| 56 ><TD | |
| 57 WIDTH="80%" | |
| 58 ALIGN="center" | |
| 59 VALIGN="bottom" | |
| 60 ></TD | |
| 61 ><TD | |
| 62 WIDTH="10%" | |
| 63 ALIGN="right" | |
| 64 VALIGN="bottom" | |
| 65 ><A | |
| 66 HREF="sdlgetvideosurface.html" | |
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67 ACCESSKEY="N" |
| 0 | 68 >Next</A |
| 69 ></TD | |
| 70 ></TR | |
| 71 ></TABLE | |
| 72 ><HR | |
| 73 ALIGN="LEFT" | |
| 74 WIDTH="100%"></DIV | |
| 75 ><DIV | |
| 76 CLASS="CHAPTER" | |
| 77 ><H1 | |
| 78 ><A | |
| 79 NAME="VIDEO" | |
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80 ></A |
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81 >Chapter 6. Video</H1 |
| 0 | 82 ><DIV |
| 83 CLASS="TOC" | |
| 84 ><DL | |
| 85 ><DT | |
| 86 ><B | |
| 87 >Table of Contents</B | |
| 88 ></DT | |
| 89 ><DT | |
| 90 ><A | |
| 91 HREF="sdlgetvideosurface.html" | |
| 92 >SDL_GetVideoSurface</A | |
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93 > -- returns a pointer to the current display surface</DT |
| 0 | 94 ><DT |
| 95 ><A | |
| 96 HREF="sdlgetvideoinfo.html" | |
| 97 >SDL_GetVideoInfo</A | |
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98 > -- returns a pointer to information about the video hardware</DT |
| 0 | 99 ><DT |
| 100 ><A | |
| 101 HREF="sdlvideodrivername.html" | |
| 102 >SDL_VideoDriverName</A | |
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103 > -- Obtain the name of the video driver</DT |
| 0 | 104 ><DT |
| 105 ><A | |
| 106 HREF="sdllistmodes.html" | |
| 107 >SDL_ListModes</A | |
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108 > -- Returns a pointer to an array of available screen dimensions for |
| 0 | 109 the given format and video flags</DT |
| 110 ><DT | |
| 111 ><A | |
| 112 HREF="sdlvideomodeok.html" | |
| 113 >SDL_VideoModeOK</A | |
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114 > -- Check to see if a particular video mode is supported.</DT |
| 0 | 115 ><DT |
| 116 ><A | |
| 117 HREF="sdlsetvideomode.html" | |
| 118 >SDL_SetVideoMode</A | |
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119 > -- Set up a video mode with the specified width, height and bits-per-pixel.</DT |
| 0 | 120 ><DT |
| 121 ><A | |
| 122 HREF="sdlupdaterect.html" | |
| 123 >SDL_UpdateRect</A | |
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124 > -- Makes sure the given area is updated on the given screen.</DT |
| 0 | 125 ><DT |
| 126 ><A | |
| 127 HREF="sdlupdaterects.html" | |
| 128 >SDL_UpdateRects</A | |
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129 > -- Makes sure the given list of rectangles is updated on the given screen.</DT |
| 0 | 130 ><DT |
| 131 ><A | |
| 132 HREF="sdlflip.html" | |
| 133 >SDL_Flip</A | |
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134 > -- Swaps screen buffers</DT |
| 0 | 135 ><DT |
| 136 ><A | |
| 137 HREF="sdlsetcolors.html" | |
| 138 >SDL_SetColors</A | |
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139 > -- Sets a portion of the colormap for the given 8-bit surface.</DT |
| 0 | 140 ><DT |
| 141 ><A | |
| 142 HREF="sdlsetpalette.html" | |
| 143 >SDL_SetPalette</A | |
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144 > -- Sets the colors in the palette of an 8-bit surface.</DT |
| 0 | 145 ><DT |
| 146 ><A | |
| 147 HREF="sdlsetgamma.html" | |
| 148 >SDL_SetGamma</A | |
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149 > -- Sets the color gamma function for the display</DT |
| 0 | 150 ><DT |
| 151 ><A | |
| 152 HREF="sdlgetgammaramp.html" | |
| 153 >SDL_GetGammaRamp</A | |
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154 > -- Gets the color gamma lookup tables for the display</DT |
| 0 | 155 ><DT |
| 156 ><A | |
| 157 HREF="sdlsetgammaramp.html" | |
| 158 >SDL_SetGammaRamp</A | |
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159 > -- Sets the color gamma lookup tables for the display</DT |
| 0 | 160 ><DT |
| 161 ><A | |
| 162 HREF="sdlmaprgb.html" | |
| 163 >SDL_MapRGB</A | |
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164 > -- Map a RGB color value to a pixel format.</DT |
| 0 | 165 ><DT |
| 166 ><A | |
| 167 HREF="sdlmaprgba.html" | |
| 168 >SDL_MapRGBA</A | |
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169 > -- Map a RGBA color value to a pixel format.</DT |
| 0 | 170 ><DT |
| 171 ><A | |
| 172 HREF="sdlgetrgb.html" | |
| 173 >SDL_GetRGB</A | |
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174 > -- Get RGB values from a pixel in the specified pixel format.</DT |
| 0 | 175 ><DT |
| 176 ><A | |
| 177 HREF="sdlgetrgba.html" | |
| 178 >SDL_GetRGBA</A | |
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179 > -- Get RGBA values from a pixel in the specified pixel format.</DT |
| 0 | 180 ><DT |
| 181 ><A | |
| 182 HREF="sdlcreatergbsurface.html" | |
| 183 >SDL_CreateRGBSurface</A | |
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184 > -- Create an empty SDL_Surface</DT |
| 0 | 185 ><DT |
| 186 ><A | |
| 187 HREF="sdlcreatergbsurfacefrom.html" | |
| 188 >SDL_CreateRGBSurfaceFrom</A | |
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189 > -- Create an SDL_Surface from pixel data</DT |
| 0 | 190 ><DT |
| 191 ><A | |
| 192 HREF="sdlfreesurface.html" | |
| 193 >SDL_FreeSurface</A | |
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194 > -- Frees (deletes) a SDL_Surface</DT |
| 0 | 195 ><DT |
| 196 ><A | |
| 197 HREF="sdllocksurface.html" | |
| 198 >SDL_LockSurface</A | |
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199 > -- Lock a surface for directly access.</DT |
| 0 | 200 ><DT |
| 201 ><A | |
| 202 HREF="sdlunlocksurface.html" | |
| 203 >SDL_UnlockSurface</A | |
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204 > -- Unlocks a previously locked surface.</DT |
| 0 | 205 ><DT |
| 206 ><A | |
| 207 HREF="sdlloadbmp.html" | |
| 208 >SDL_LoadBMP</A | |
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209 > -- Load a Windows BMP file into an SDL_Surface.</DT |
| 0 | 210 ><DT |
| 211 ><A | |
| 212 HREF="sdlsavebmp.html" | |
| 213 >SDL_SaveBMP</A | |
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214 > -- Save an SDL_Surface as a Windows BMP file.</DT |
| 0 | 215 ><DT |
| 216 ><A | |
| 217 HREF="sdlsetcolorkey.html" | |
| 218 >SDL_SetColorKey</A | |
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219 > -- Sets the color key (transparent pixel) in a blittable surface and |
| 0 | 220 RLE acceleration.</DT |
| 221 ><DT | |
| 222 ><A | |
| 223 HREF="sdlsetalpha.html" | |
| 224 >SDL_SetAlpha</A | |
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225 > -- Adjust the alpha properties of a surface</DT |
| 0 | 226 ><DT |
| 227 ><A | |
| 228 HREF="sdlsetcliprect.html" | |
| 229 >SDL_SetClipRect</A | |
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230 > -- Sets the clipping rectangle for a surface.</DT |
| 0 | 231 ><DT |
| 232 ><A | |
| 233 HREF="sdlgetcliprect.html" | |
| 234 >SDL_GetClipRect</A | |
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235 > -- Gets the clipping rectangle for a surface.</DT |
| 0 | 236 ><DT |
| 237 ><A | |
| 238 HREF="sdlconvertsurface.html" | |
| 239 >SDL_ConvertSurface</A | |
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240 > -- Converts a surface to the same format as another surface.</DT |
| 0 | 241 ><DT |
| 242 ><A | |
| 243 HREF="sdlblitsurface.html" | |
| 244 >SDL_BlitSurface</A | |
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245 > -- This performs a fast blit from the source surface to the destination surface.</DT |
| 0 | 246 ><DT |
| 247 ><A | |
| 248 HREF="sdlfillrect.html" | |
| 249 >SDL_FillRect</A | |
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250 > -- This function performs a fast fill of the given rectangle with some color</DT |
| 0 | 251 ><DT |
| 252 ><A | |
| 253 HREF="sdldisplayformat.html" | |
| 254 >SDL_DisplayFormat</A | |
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255 > -- Convert a surface to the display format</DT |
| 0 | 256 ><DT |
| 257 ><A | |
| 258 HREF="sdldisplayformatalpha.html" | |
| 259 >SDL_DisplayFormatAlpha</A | |
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260 > -- Convert a surface to the display format</DT |
| 0 | 261 ><DT |
| 262 ><A | |
| 263 HREF="sdlwarpmouse.html" | |
| 264 >SDL_WarpMouse</A | |
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265 > -- Set the position of the mouse cursor.</DT |
| 0 | 266 ><DT |
| 267 ><A | |
| 268 HREF="sdlcreatecursor.html" | |
| 269 >SDL_CreateCursor</A | |
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270 > -- Creates a new mouse cursor.</DT |
| 0 | 271 ><DT |
| 272 ><A | |
| 273 HREF="sdlfreecursor.html" | |
| 274 >SDL_FreeCursor</A | |
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275 > -- Frees a cursor created with SDL_CreateCursor.</DT |
| 0 | 276 ><DT |
| 277 ><A | |
| 278 HREF="sdlsetcursor.html" | |
| 279 >SDL_SetCursor</A | |
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280 > -- Set the currently active mouse cursor.</DT |
| 0 | 281 ><DT |
| 282 ><A | |
| 283 HREF="sdlgetcursor.html" | |
| 284 >SDL_GetCursor</A | |
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285 > -- Get the currently active mouse cursor.</DT |
| 0 | 286 ><DT |
| 287 ><A | |
| 288 HREF="sdlshowcursor.html" | |
| 289 >SDL_ShowCursor</A | |
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290 > -- Toggle whether or not the cursor is shown on the screen.</DT |
| 0 | 291 ><DT |
| 292 ><A | |
| 293 HREF="sdlglloadlibrary.html" | |
| 294 >SDL_GL_LoadLibrary</A | |
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295 > -- Specify an OpenGL library</DT |
| 0 | 296 ><DT |
| 297 ><A | |
| 298 HREF="sdlglgetprocaddress.html" | |
| 299 >SDL_GL_GetProcAddress</A | |
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300 > -- Get the address of a GL function</DT |
| 0 | 301 ><DT |
| 302 ><A | |
| 303 HREF="sdlglgetattribute.html" | |
| 304 >SDL_GL_GetAttribute</A | |
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305 > -- Get the value of a special SDL/OpenGL attribute</DT |
| 0 | 306 ><DT |
| 307 ><A | |
| 308 HREF="sdlglsetattribute.html" | |
| 309 >SDL_GL_SetAttribute</A | |
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310 > -- Set a special SDL/OpenGL attribute</DT |
| 0 | 311 ><DT |
| 312 ><A | |
| 313 HREF="sdlglswapbuffers.html" | |
| 314 >SDL_GL_SwapBuffers</A | |
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315 > -- Swap OpenGL framebuffers/Update Display</DT |
| 0 | 316 ><DT |
| 317 ><A | |
| 318 HREF="sdlcreateyuvoverlay.html" | |
| 319 >SDL_CreateYUVOverlay</A | |
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320 > -- Create a YUV video overlay</DT |
| 0 | 321 ><DT |
| 322 ><A | |
| 323 HREF="sdllockyuvoverlay.html" | |
| 324 >SDL_LockYUVOverlay</A | |
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325 > -- Lock an overlay</DT |
| 0 | 326 ><DT |
| 327 ><A | |
| 328 HREF="sdlunlockyuvoverlay.html" | |
| 329 >SDL_UnlockYUVOverlay</A | |
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330 > -- Unlock an overlay</DT |
| 0 | 331 ><DT |
| 332 ><A | |
| 333 HREF="sdldisplayyuvoverlay.html" | |
| 334 >SDL_DisplayYUVOverlay</A | |
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335 > -- Blit the overlay to the display</DT |
| 0 | 336 ><DT |
| 337 ><A | |
| 338 HREF="sdlfreeyuvoverlay.html" | |
| 339 >SDL_FreeYUVOverlay</A | |
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340 > -- Free a YUV video overlay</DT |
| 0 | 341 ><DT |
| 342 ><A | |
| 343 HREF="sdlglattr.html" | |
| 344 >SDL_GLattr</A | |
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345 > -- SDL GL Attributes</DT |
| 0 | 346 ><DT |
| 347 ><A | |
| 348 HREF="sdlrect.html" | |
| 349 >SDL_Rect</A | |
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350 > -- Defines a rectangular area</DT |
| 0 | 351 ><DT |
| 352 ><A | |
| 353 HREF="sdlcolor.html" | |
| 354 >SDL_Color</A | |
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355 > -- Format independent color description</DT |
| 0 | 356 ><DT |
| 357 ><A | |
| 358 HREF="sdlpalette.html" | |
| 359 >SDL_Palette</A | |
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360 > -- Color palette for 8-bit pixel formats</DT |
| 0 | 361 ><DT |
| 362 ><A | |
| 363 HREF="sdlpixelformat.html" | |
| 364 >SDL_PixelFormat</A | |
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365 > -- Stores surface format information</DT |
| 0 | 366 ><DT |
| 367 ><A | |
| 368 HREF="sdlsurface.html" | |
| 369 >SDL_Surface</A | |
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370 > -- Graphical Surface Structure</DT |
| 0 | 371 ><DT |
| 372 ><A | |
| 373 HREF="sdlvideoinfo.html" | |
| 374 >SDL_VideoInfo</A | |
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375 > -- Video Target information</DT |
| 0 | 376 ><DT |
| 377 ><A | |
| 378 HREF="sdloverlay.html" | |
| 379 >SDL_Overlay</A | |
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380 > -- YUV video overlay</DT |
| 0 | 381 ></DL |
| 382 ></DIV | |
| 383 ><P | |
| 384 >SDL presents a very simple interface to the display framebuffer. The | |
| 385 framebuffer is represented as an offscreen surface to which you can write | |
| 386 directly. If you want the screen to show what you have written, call the <A | |
| 387 HREF="sdlupdaterects.html" | |
| 388 >update</A | |
| 389 > function which will | |
| 390 guarantee that the desired portion of the screen is updated.</P | |
| 391 ><P | |
| 392 >Before you call any of the SDL video functions, you must first call | |
| 393 <SPAN | |
| 394 CLASS="TOKEN" | |
| 395 >SDL_Init(SDL_INIT_VIDEO)</SPAN | |
| 396 >, which initializes the video | |
| 397 and events in the SDL library. Check the return code, which should be | |
| 398 <SPAN | |
| 399 CLASS="RETURNVALUE" | |
| 400 >0</SPAN | |
| 401 >, to see if there were any errors in starting up.</P | |
| 402 ><P | |
| 403 >If you use both sound and video in your application, you need to call | |
| 404 <SPAN | |
| 405 CLASS="TOKEN" | |
| 406 >SDL_Init(SDL_INIT_AUDIO | SDL_INIT_VIDEO)</SPAN | |
| 407 > before opening the | |
| 408 sound device, otherwise under Win32 DirectX, you won't be able to set | |
| 409 full-screen display modes.</P | |
| 410 ><P | |
| 411 >After you have initialized the library, you can start up the video display in a | |
| 412 number of ways. The easiest way is to pick a common screen resolution and | |
| 413 depth and just initialize the video, checking for errors. You will probably | |
| 414 get what you want, but SDL may be emulating your requested mode and converting | |
| 415 the display on update. The best way is to | |
| 416 <A | |
| 417 HREF="sdlgetvideoinfo.html" | |
| 418 >query</A | |
| 419 >, for the best | |
| 420 video mode closest to the desired one, and then | |
| 421 <A | |
| 422 HREF="sdldisplayformat.html" | |
| 423 >convert</A | |
| 424 > | |
| 425 your images to that pixel format.</P | |
| 426 ><P | |
| 427 >SDL currently supports any bit depth >= 8 bits per pixel. 8 bpp formats are | |
| 428 considered 8-bit palettized modes, while 12, 15, 16, 24, and 32 bits per pixel | |
| 429 are considered "packed pixel" modes, meaning each pixel contains the RGB color | |
| 430 components packed in the bits of the pixel.</P | |
| 431 ><P | |
| 432 >After you have initialized your video mode, you can take the surface that was | |
| 433 returned, and write to it like any other framebuffer, calling the update | |
| 434 routine as you go.</P | |
| 435 ><P | |
| 436 >When you have finished your video access and are ready to quit your | |
| 437 application, you should call "<SPAN | |
| 438 CLASS="TOKEN" | |
| 439 >SDL_Quit()</SPAN | |
| 440 >" to shutdown the | |
| 441 video and events.</P | |
| 442 ></DIV | |
| 443 ><DIV | |
| 444 CLASS="NAVFOOTER" | |
| 445 ><HR | |
| 446 ALIGN="LEFT" | |
| 447 WIDTH="100%"><TABLE | |
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448 SUMMARY="Footer navigation table" |
| 0 | 449 WIDTH="100%" |
| 450 BORDER="0" | |
| 451 CELLPADDING="0" | |
| 452 CELLSPACING="0" | |
| 453 ><TR | |
| 454 ><TD | |
| 455 WIDTH="33%" | |
| 456 ALIGN="left" | |
| 457 VALIGN="top" | |
| 458 ><A | |
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459 HREF="sdlenvvars.html" |
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460 ACCESSKEY="P" |
| 0 | 461 >Prev</A |
| 462 ></TD | |
| 463 ><TD | |
| 464 WIDTH="34%" | |
| 465 ALIGN="center" | |
| 466 VALIGN="top" | |
| 467 ><A | |
| 468 HREF="index.html" | |
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469 ACCESSKEY="H" |
| 0 | 470 >Home</A |
| 471 ></TD | |
| 472 ><TD | |
| 473 WIDTH="33%" | |
| 474 ALIGN="right" | |
| 475 VALIGN="top" | |
| 476 ><A | |
| 477 HREF="sdlgetvideosurface.html" | |
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478 ACCESSKEY="N" |
| 0 | 479 >Next</A |
| 480 ></TD | |
| 481 ></TR | |
| 482 ><TR | |
| 483 ><TD | |
| 484 WIDTH="33%" | |
| 485 ALIGN="left" | |
| 486 VALIGN="top" | |
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487 >SDL_envvars</TD |
| 0 | 488 ><TD |
| 489 WIDTH="34%" | |
| 490 ALIGN="center" | |
| 491 VALIGN="top" | |
| 492 ><A | |
| 493 HREF="reference.html" | |
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494 ACCESSKEY="U" |
| 0 | 495 >Up</A |
| 496 ></TD | |
| 497 ><TD | |
| 498 WIDTH="33%" | |
| 499 ALIGN="right" | |
| 500 VALIGN="top" | |
| 501 >SDL_GetVideoSurface</TD | |
| 502 ></TR | |
| 503 ></TABLE | |
| 504 ></DIV | |
| 505 ></BODY | |
| 506 ></HTML | |
| 507 > |