Mercurial > sdl-ios-xcode
annotate src/video/SDL_video.c @ 1844:ed2f5e31b357
Removed support for Darwin, due to build problems on ps2linux
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 17 May 2006 04:21:33 +0000 |
| parents | eacc5bc01d1c |
| children | c121d94672cb 842b03d703c5 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 9 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
|
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 /* The high-level video driver subsystem */ | |
| 25 | |
| 26 #include "SDL.h" | |
| 27 #include "SDL_sysvideo.h" | |
| 28 #include "SDL_blit.h" | |
| 29 #include "SDL_pixels_c.h" | |
| 30 #include "SDL_cursor_c.h" | |
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31 #include "../events/SDL_sysevents.h" |
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32 #include "../events/SDL_events_c.h" |
| 0 | 33 |
| 34 /* Available video drivers */ | |
| 35 static VideoBootStrap *bootstrap[] = { | |
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36 #if SDL_VIDEO_DRIVER_QUARTZ |
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37 &QZ_bootstrap, |
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38 #endif |
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39 #if SDL_VIDEO_DRIVER_X11 |
| 0 | 40 &X11_bootstrap, |
| 41 #endif | |
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42 #if SDL_VIDEO_DRIVER_DGA |
| 0 | 43 &DGA_bootstrap, |
| 44 #endif | |
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45 #if SDL_VIDEO_DRIVER_NANOX |
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46 &NX_bootstrap, |
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47 #endif |
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48 #if SDL_VIDEO_DRIVER_IPOD |
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49 &iPod_bootstrap, |
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50 #endif |
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51 #if SDL_VIDEO_DRIVER_QTOPIA |
| 567 | 52 &Qtopia_bootstrap, |
| 53 #endif | |
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54 #if SDL_VIDEO_DRIVER_WSCONS |
| 1187 | 55 &WSCONS_bootstrap, |
| 56 #endif | |
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57 #if SDL_VIDEO_DRIVER_FBCON |
| 0 | 58 &FBCON_bootstrap, |
| 59 #endif | |
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60 #if SDL_VIDEO_DRIVER_DIRECTFB |
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61 &DirectFB_bootstrap, |
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62 #endif |
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63 #if SDL_VIDEO_DRIVER_PS2GS |
| 0 | 64 &PS2GS_bootstrap, |
| 65 #endif | |
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66 #if SDL_VIDEO_DRIVER_GGI |
| 0 | 67 &GGI_bootstrap, |
| 68 #endif | |
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69 #if SDL_VIDEO_DRIVER_VGL |
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70 &VGL_bootstrap, |
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71 #endif |
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72 #if SDL_VIDEO_DRIVER_SVGALIB |
| 0 | 73 &SVGALIB_bootstrap, |
| 74 #endif | |
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75 #if SDL_VIDEO_DRIVER_GAPI |
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76 &GAPI_bootstrap, |
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77 #endif |
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78 #if SDL_VIDEO_DRIVER_WINDIB |
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79 &WINDIB_bootstrap, |
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80 #endif |
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81 #if SDL_VIDEO_DRIVER_DDRAW |
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82 &DIRECTX_bootstrap, |
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83 #endif |
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84 #if SDL_VIDEO_DRIVER_BWINDOW |
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85 &BWINDOW_bootstrap, |
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86 #endif |
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87 #if SDL_VIDEO_DRIVER_TOOLBOX |
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88 &TOOLBOX_bootstrap, |
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89 #endif |
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90 #if SDL_VIDEO_DRIVER_DRAWSPROCKET |
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91 &DSp_bootstrap, |
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92 #endif |
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93 #if SDL_VIDEO_DRIVER_CYBERGRAPHICS |
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94 &CGX_bootstrap, |
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95 #endif |
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96 #if SDL_VIDEO_DRIVER_PHOTON |
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97 &ph_bootstrap, |
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98 #endif |
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99 #if SDL_VIDEO_DRIVER_EPOC |
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100 &EPOC_bootstrap, |
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101 #endif |
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102 #if SDL_VIDEO_DRIVER_XBIOS |
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103 &XBIOS_bootstrap, |
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104 #endif |
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105 #if SDL_VIDEO_DRIVER_GEM |
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106 &GEM_bootstrap, |
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107 #endif |
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108 #if SDL_VIDEO_DRIVER_PICOGUI |
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109 &PG_bootstrap, |
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110 #endif |
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111 #if SDL_VIDEO_DRIVER_DC |
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112 &DC_bootstrap, |
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113 #endif |
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114 #if SDL_VIDEO_DRIVER_RISCOS |
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115 &RISCOS_bootstrap, |
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116 #endif |
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117 #if SDL_VIDEO_DRIVER_OS2FS |
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118 &OS2FSLib_bootstrap, |
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119 #endif |
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120 #if SDL_VIDEO_DRIVER_AALIB |
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121 &AALIB_bootstrap, |
| 0 | 122 #endif |
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123 #if SDL_VIDEO_DRIVER_DUMMY |
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124 &DUMMY_bootstrap, |
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125 #endif |
| 0 | 126 NULL |
| 127 }; | |
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128 |
| 0 | 129 SDL_VideoDevice *current_video = NULL; |
| 130 | |
| 131 /* Various local functions */ | |
| 132 int SDL_VideoInit(const char *driver_name, Uint32 flags); | |
| 133 void SDL_VideoQuit(void); | |
| 134 void SDL_GL_UpdateRectsLock(SDL_VideoDevice* this, int numrects, SDL_Rect* rects); | |
| 135 | |
| 136 static SDL_GrabMode SDL_WM_GrabInputOff(void); | |
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137 #if SDL_VIDEO_OPENGL |
| 0 | 138 static int lock_count = 0; |
| 139 #endif | |
| 140 | |
| 141 | |
| 142 /* | |
| 143 * Initialize the video and event subsystems -- determine native pixel format | |
| 144 */ | |
| 145 int SDL_VideoInit (const char *driver_name, Uint32 flags) | |
| 146 { | |
| 147 SDL_VideoDevice *video; | |
| 148 int index; | |
| 149 int i; | |
| 150 SDL_PixelFormat vformat; | |
| 151 Uint32 video_flags; | |
| 152 | |
| 153 /* Toggle the event thread flags, based on OS requirements */ | |
| 154 #if defined(MUST_THREAD_EVENTS) | |
| 155 flags |= SDL_INIT_EVENTTHREAD; | |
| 156 #elif defined(CANT_THREAD_EVENTS) | |
| 157 if ( (flags & SDL_INIT_EVENTTHREAD) == SDL_INIT_EVENTTHREAD ) { | |
| 158 SDL_SetError("OS doesn't support threaded events"); | |
| 159 return(-1); | |
| 160 } | |
| 161 #endif | |
| 162 | |
| 163 /* Check to make sure we don't overwrite 'current_video' */ | |
| 164 if ( current_video != NULL ) { | |
| 165 SDL_VideoQuit(); | |
| 166 } | |
| 167 | |
| 168 /* Select the proper video driver */ | |
| 169 index = 0; | |
| 170 video = NULL; | |
| 171 if ( driver_name != NULL ) { | |
| 172 #if 0 /* This will be replaced with a better driver selection API */ | |
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173 if ( SDL_strrchr(driver_name, ':') != NULL ) { |
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174 index = atoi(SDL_strrchr(driver_name, ':')+1); |
| 0 | 175 } |
| 176 #endif | |
| 177 for ( i=0; bootstrap[i]; ++i ) { | |
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178 if ( SDL_strncmp(bootstrap[i]->name, driver_name, |
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179 SDL_strlen(bootstrap[i]->name)) == 0 ) { |
| 0 | 180 if ( bootstrap[i]->available() ) { |
| 181 video = bootstrap[i]->create(index); | |
| 182 break; | |
| 183 } | |
| 184 } | |
| 185 } | |
| 186 } else { | |
| 187 for ( i=0; bootstrap[i]; ++i ) { | |
| 188 if ( bootstrap[i]->available() ) { | |
| 189 video = bootstrap[i]->create(index); | |
| 190 if ( video != NULL ) { | |
| 191 break; | |
| 192 } | |
| 193 } | |
| 194 } | |
| 195 } | |
| 196 if ( video == NULL ) { | |
| 197 SDL_SetError("No available video device"); | |
| 198 return(-1); | |
| 199 } | |
| 200 current_video = video; | |
| 201 current_video->name = bootstrap[i]->name; | |
| 202 | |
| 203 /* Do some basic variable initialization */ | |
| 204 video->screen = NULL; | |
| 205 video->shadow = NULL; | |
| 206 video->visible = NULL; | |
| 207 video->physpal = NULL; | |
| 208 video->gammacols = NULL; | |
| 209 video->gamma = NULL; | |
| 210 video->wm_title = NULL; | |
| 211 video->wm_icon = NULL; | |
| 212 video->offset_x = 0; | |
| 213 video->offset_y = 0; | |
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214 SDL_memset(&video->info, 0, (sizeof video->info)); |
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215 |
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216 video->displayformatalphapixel = NULL; |
| 0 | 217 |
| 218 /* Set some very sane GL defaults */ | |
| 219 video->gl_config.driver_loaded = 0; | |
| 220 video->gl_config.dll_handle = NULL; | |
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221 video->gl_config.red_size = 3; |
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222 video->gl_config.green_size = 3; |
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223 video->gl_config.blue_size = 2; |
| 0 | 224 video->gl_config.alpha_size = 0; |
| 225 video->gl_config.buffer_size = 0; | |
| 226 video->gl_config.depth_size = 16; | |
| 227 video->gl_config.stencil_size = 0; | |
| 228 video->gl_config.double_buffer = 1; | |
| 229 video->gl_config.accum_red_size = 0; | |
| 230 video->gl_config.accum_green_size = 0; | |
| 231 video->gl_config.accum_blue_size = 0; | |
| 232 video->gl_config.accum_alpha_size = 0; | |
|
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233 video->gl_config.stereo = 0; |
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234 video->gl_config.multisamplebuffers = 0; |
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235 video->gl_config.multisamplesamples = 0; |
| 1737 | 236 video->gl_config.accelerated = -1; /* not known, don't set */ |
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237 video->gl_config.swap_control = -1; /* not known, don't set */ |
| 0 | 238 |
| 239 /* Initialize the video subsystem */ | |
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240 SDL_memset(&vformat, 0, sizeof(vformat)); |
| 0 | 241 if ( video->VideoInit(video, &vformat) < 0 ) { |
| 242 SDL_VideoQuit(); | |
| 243 return(-1); | |
| 244 } | |
| 245 | |
| 246 /* Create a zero sized video surface of the appropriate format */ | |
| 247 video_flags = SDL_SWSURFACE; | |
| 248 SDL_VideoSurface = SDL_CreateRGBSurface(video_flags, 0, 0, | |
| 249 vformat.BitsPerPixel, | |
| 250 vformat.Rmask, vformat.Gmask, vformat.Bmask, 0); | |
| 251 if ( SDL_VideoSurface == NULL ) { | |
| 252 SDL_VideoQuit(); | |
| 253 return(-1); | |
| 254 } | |
| 255 SDL_PublicSurface = NULL; /* Until SDL_SetVideoMode() */ | |
| 256 | |
| 257 #if 0 /* Don't change the current palette - may be used by other programs. | |
| 258 * The application can't do anything with the display surface until | |
| 259 * a video mode has been set anyway. :) | |
| 260 */ | |
| 261 /* If we have a palettized surface, create a default palette */ | |
| 262 if ( SDL_VideoSurface->format->palette ) { | |
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263 SDL_PixelFormat *vf = SDL_VideoSurface->format; |
| 0 | 264 SDL_DitherColors(vf->palette->colors, vf->BitsPerPixel); |
| 265 video->SetColors(video, | |
| 266 0, vf->palette->ncolors, vf->palette->colors); | |
| 267 } | |
| 268 #endif | |
| 269 video->info.vfmt = SDL_VideoSurface->format; | |
| 270 | |
| 271 /* Start the event loop */ | |
| 272 if ( SDL_StartEventLoop(flags) < 0 ) { | |
| 273 SDL_VideoQuit(); | |
| 274 return(-1); | |
| 275 } | |
| 276 SDL_CursorInit(flags & SDL_INIT_EVENTTHREAD); | |
| 277 | |
| 278 /* We're ready to go! */ | |
| 279 return(0); | |
| 280 } | |
| 281 | |
| 282 char *SDL_VideoDriverName(char *namebuf, int maxlen) | |
| 283 { | |
| 284 if ( current_video != NULL ) { | |
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285 SDL_strlcpy(namebuf, current_video->name, maxlen); |
| 0 | 286 return(namebuf); |
| 287 } | |
| 288 return(NULL); | |
| 289 } | |
| 290 | |
| 291 /* | |
| 292 * Get the current display surface | |
| 293 */ | |
| 294 SDL_Surface *SDL_GetVideoSurface(void) | |
| 295 { | |
| 296 SDL_Surface *visible; | |
| 297 | |
| 298 visible = NULL; | |
| 299 if ( current_video ) { | |
| 300 visible = current_video->visible; | |
| 301 } | |
| 302 return(visible); | |
| 303 } | |
| 304 | |
| 305 /* | |
| 306 * Get the current information about the video hardware | |
| 307 */ | |
| 308 const SDL_VideoInfo *SDL_GetVideoInfo(void) | |
| 309 { | |
| 310 const SDL_VideoInfo *info; | |
| 311 | |
| 312 info = NULL; | |
| 313 if ( current_video ) { | |
| 314 info = ¤t_video->info; | |
| 315 } | |
| 316 return(info); | |
| 317 } | |
| 318 | |
| 319 /* | |
| 320 * Return a pointer to an array of available screen dimensions for the | |
| 321 * given format, sorted largest to smallest. Returns NULL if there are | |
| 322 * no dimensions available for a particular format, or (SDL_Rect **)-1 | |
| 323 * if any dimension is okay for the given format. If 'format' is NULL, | |
| 324 * the mode list will be for the format given by SDL_GetVideoInfo()->vfmt | |
| 325 */ | |
| 326 SDL_Rect ** SDL_ListModes (SDL_PixelFormat *format, Uint32 flags) | |
| 327 { | |
| 328 SDL_VideoDevice *video = current_video; | |
| 329 SDL_VideoDevice *this = current_video; | |
| 330 SDL_Rect **modes; | |
| 331 | |
| 332 modes = NULL; | |
| 333 if ( SDL_VideoSurface ) { | |
| 334 if ( format == NULL ) { | |
| 335 format = SDL_VideoSurface->format; | |
| 336 } | |
| 337 modes = video->ListModes(this, format, flags); | |
| 338 } | |
| 339 return(modes); | |
| 340 } | |
| 341 | |
| 342 /* | |
| 343 * Check to see if a particular video mode is supported. | |
| 344 * It returns 0 if the requested mode is not supported under any bit depth, | |
| 345 * or returns the bits-per-pixel of the closest available mode with the | |
| 346 * given width and height. If this bits-per-pixel is different from the | |
| 347 * one used when setting the video mode, SDL_SetVideoMode() will succeed, | |
| 348 * but will emulate the requested bits-per-pixel with a shadow surface. | |
| 349 */ | |
| 350 static Uint8 SDL_closest_depths[4][8] = { | |
| 351 /* 8 bit closest depth ordering */ | |
| 352 { 0, 8, 16, 15, 32, 24, 0, 0 }, | |
| 353 /* 15,16 bit closest depth ordering */ | |
| 354 { 0, 16, 15, 32, 24, 8, 0, 0 }, | |
| 355 /* 24 bit closest depth ordering */ | |
| 356 { 0, 24, 32, 16, 15, 8, 0, 0 }, | |
| 357 /* 32 bit closest depth ordering */ | |
| 358 { 0, 32, 16, 15, 24, 8, 0, 0 } | |
| 359 }; | |
| 360 | |
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361 |
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362 #ifdef __MACOS__ /* MPW optimization bug? */ |
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363 #define NEGATIVE_ONE 0xFFFFFFFF |
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364 #else |
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365 #define NEGATIVE_ONE -1 |
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366 #endif |
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367 |
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368 int SDL_VideoModeOK (int width, int height, int bpp, Uint32 flags) |
| 0 | 369 { |
| 370 int table, b, i; | |
| 371 int supported; | |
| 372 SDL_PixelFormat format; | |
| 373 SDL_Rect **sizes; | |
| 374 | |
| 375 /* Currently 1 and 4 bpp are not supported */ | |
| 376 if ( bpp < 8 || bpp > 32 ) { | |
| 377 return(0); | |
| 378 } | |
|
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379 if ( (width <= 0) || (height <= 0) ) { |
| 0 | 380 return(0); |
| 381 } | |
| 382 | |
| 383 /* Search through the list valid of modes */ | |
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384 SDL_memset(&format, 0, sizeof(format)); |
| 0 | 385 supported = 0; |
| 386 table = ((bpp+7)/8)-1; | |
| 387 SDL_closest_depths[table][0] = bpp; | |
| 388 SDL_closest_depths[table][7] = 0; | |
| 389 for ( b = 0; !supported && SDL_closest_depths[table][b]; ++b ) { | |
| 390 format.BitsPerPixel = SDL_closest_depths[table][b]; | |
| 391 sizes = SDL_ListModes(&format, flags); | |
| 392 if ( sizes == (SDL_Rect **)0 ) { | |
| 393 /* No sizes supported at this bit-depth */ | |
| 394 continue; | |
| 395 } else | |
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396 if (sizes == (SDL_Rect **)NEGATIVE_ONE) { |
| 0 | 397 /* Any size supported at this bit-depth */ |
| 398 supported = 1; | |
| 399 continue; | |
|
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400 } else if (current_video->handles_any_size) { |
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401 /* Driver can center a smaller surface to simulate fullscreen */ |
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402 for ( i=0; sizes[i]; ++i ) { |
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403 if ((sizes[i]->w >= width) && (sizes[i]->h >= height)) { |
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404 supported = 1; /* this mode can fit the centered window. */ |
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405 break; |
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406 } |
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407 } |
| 0 | 408 } else |
| 409 for ( i=0; sizes[i]; ++i ) { | |
| 410 if ((sizes[i]->w == width) && (sizes[i]->h == height)) { | |
| 411 supported = 1; | |
| 412 break; | |
| 413 } | |
| 414 } | |
| 415 } | |
| 416 if ( supported ) { | |
| 417 --b; | |
| 418 return(SDL_closest_depths[table][b]); | |
| 419 } else { | |
| 420 return(0); | |
| 421 } | |
| 422 } | |
| 423 | |
| 424 /* | |
| 425 * Get the closest non-emulated video mode to the one requested | |
| 426 */ | |
| 427 static int SDL_GetVideoMode (int *w, int *h, int *BitsPerPixel, Uint32 flags) | |
| 428 { | |
| 429 int table, b, i; | |
| 430 int supported; | |
| 431 int native_bpp; | |
| 432 SDL_PixelFormat format; | |
| 433 SDL_Rect **sizes; | |
| 434 | |
|
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435 /* Check parameters */ |
|
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436 if ( *BitsPerPixel < 8 || *BitsPerPixel > 32 ) { |
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437 SDL_SetError("Invalid bits per pixel (range is {8...32})"); |
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438 return(0); |
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439 } |
|
430
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440 if ((*w <= 0) || (*h <= 0)) { |
|
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441 SDL_SetError("Invalid width or height"); |
|
430
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442 return(0); |
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443 } |
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444 |
| 0 | 445 /* Try the original video mode, get the closest depth */ |
| 446 native_bpp = SDL_VideoModeOK(*w, *h, *BitsPerPixel, flags); | |
| 447 if ( native_bpp == *BitsPerPixel ) { | |
| 448 return(1); | |
| 449 } | |
| 450 if ( native_bpp > 0 ) { | |
| 451 *BitsPerPixel = native_bpp; | |
| 452 return(1); | |
| 453 } | |
| 454 | |
| 455 /* No exact size match at any depth, look for closest match */ | |
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456 SDL_memset(&format, 0, sizeof(format)); |
| 0 | 457 supported = 0; |
| 458 table = ((*BitsPerPixel+7)/8)-1; | |
| 459 SDL_closest_depths[table][0] = *BitsPerPixel; | |
| 460 SDL_closest_depths[table][7] = SDL_VideoSurface->format->BitsPerPixel; | |
| 461 for ( b = 0; !supported && SDL_closest_depths[table][b]; ++b ) { | |
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462 int best; |
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463 |
| 0 | 464 format.BitsPerPixel = SDL_closest_depths[table][b]; |
| 465 sizes = SDL_ListModes(&format, flags); | |
| 466 if ( sizes == (SDL_Rect **)0 ) { | |
| 467 /* No sizes supported at this bit-depth */ | |
| 468 continue; | |
| 469 } | |
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470 best=0; |
| 0 | 471 for ( i=0; sizes[i]; ++i ) { |
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472 /* Mode with both dimensions bigger or equal than asked ? */ |
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473 if ((sizes[i]->w >= *w) && (sizes[i]->h >= *h)) { |
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474 /* Mode with any dimension smaller or equal than current best ? */ |
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475 if ((sizes[i]->w <= sizes[best]->w) || (sizes[i]->h <= sizes[best]->h)) { |
|
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[PATCH] SDL_GetVideoMode() does not find best mode, part 2
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476 /* Now choose the mode that has less pixels */ |
|
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477 if ((sizes[i]->w * sizes[i]->h) <= (sizes[best]->w * sizes[best]->h)) { |
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478 best=i; |
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479 supported = 1; |
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480 } |
| 0 | 481 } |
| 482 } | |
| 483 } | |
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484 if (supported) { |
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485 *w=sizes[best]->w; |
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486 *h=sizes[best]->h; |
| 0 | 487 *BitsPerPixel = SDL_closest_depths[table][b]; |
| 488 } | |
| 489 } | |
| 490 if ( ! supported ) { | |
| 491 SDL_SetError("No video mode large enough for %dx%d", *w, *h); | |
| 492 } | |
| 493 return(supported); | |
| 494 } | |
| 495 | |
| 496 /* This should probably go somewhere else -- like SDL_surface.c */ | |
| 497 static void SDL_ClearSurface(SDL_Surface *surface) | |
| 498 { | |
| 499 Uint32 black; | |
| 500 | |
| 501 black = SDL_MapRGB(surface->format, 0, 0, 0); | |
| 502 SDL_FillRect(surface, NULL, black); | |
| 503 if ((surface->flags&SDL_HWSURFACE) && (surface->flags&SDL_DOUBLEBUF)) { | |
| 504 SDL_Flip(surface); | |
| 505 SDL_FillRect(surface, NULL, black); | |
| 506 } | |
| 507 SDL_Flip(surface); | |
| 508 } | |
| 509 | |
| 510 /* | |
| 511 * Create a shadow surface suitable for fooling the app. :-) | |
| 512 */ | |
| 513 static void SDL_CreateShadowSurface(int depth) | |
| 514 { | |
| 515 Uint32 Rmask, Gmask, Bmask; | |
| 516 | |
| 517 /* Allocate the shadow surface */ | |
| 518 if ( depth == (SDL_VideoSurface->format)->BitsPerPixel ) { | |
| 519 Rmask = (SDL_VideoSurface->format)->Rmask; | |
| 520 Gmask = (SDL_VideoSurface->format)->Gmask; | |
| 521 Bmask = (SDL_VideoSurface->format)->Bmask; | |
| 522 } else { | |
| 523 Rmask = Gmask = Bmask = 0; | |
| 524 } | |
| 525 SDL_ShadowSurface = SDL_CreateRGBSurface(SDL_SWSURFACE, | |
| 526 SDL_VideoSurface->w, SDL_VideoSurface->h, | |
| 527 depth, Rmask, Gmask, Bmask, 0); | |
| 528 if ( SDL_ShadowSurface == NULL ) { | |
| 529 return; | |
| 530 } | |
| 531 | |
| 532 /* 8-bit shadow surfaces report that they have exclusive palette */ | |
| 533 if ( SDL_ShadowSurface->format->palette ) { | |
| 534 SDL_ShadowSurface->flags |= SDL_HWPALETTE; | |
| 535 if ( depth == (SDL_VideoSurface->format)->BitsPerPixel ) { | |
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536 SDL_memcpy(SDL_ShadowSurface->format->palette->colors, |
| 0 | 537 SDL_VideoSurface->format->palette->colors, |
| 538 SDL_VideoSurface->format->palette->ncolors* | |
| 539 sizeof(SDL_Color)); | |
| 540 } else { | |
| 541 SDL_DitherColors( | |
| 542 SDL_ShadowSurface->format->palette->colors, depth); | |
| 543 } | |
| 544 } | |
| 545 | |
| 546 /* If the video surface is resizable, the shadow should say so */ | |
| 547 if ( (SDL_VideoSurface->flags & SDL_RESIZABLE) == SDL_RESIZABLE ) { | |
| 548 SDL_ShadowSurface->flags |= SDL_RESIZABLE; | |
| 549 } | |
| 550 /* If the video surface has no frame, the shadow should say so */ | |
| 551 if ( (SDL_VideoSurface->flags & SDL_NOFRAME) == SDL_NOFRAME ) { | |
| 552 SDL_ShadowSurface->flags |= SDL_NOFRAME; | |
| 553 } | |
| 554 /* If the video surface is fullscreen, the shadow should say so */ | |
| 555 if ( (SDL_VideoSurface->flags & SDL_FULLSCREEN) == SDL_FULLSCREEN ) { | |
| 556 SDL_ShadowSurface->flags |= SDL_FULLSCREEN; | |
| 557 } | |
| 558 /* If the video surface is flippable, the shadow should say so */ | |
| 559 if ( (SDL_VideoSurface->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) { | |
| 560 SDL_ShadowSurface->flags |= SDL_DOUBLEBUF; | |
| 561 } | |
| 562 return; | |
| 563 } | |
| 564 | |
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565 #ifdef __QNXNTO__ |
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566 #include <sys/neutrino.h> |
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567 #endif /* __QNXNTO__ */ |
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568 |
| 0 | 569 /* |
| 570 * Set the requested video mode, allocating a shadow buffer if necessary. | |
| 571 */ | |
| 572 SDL_Surface * SDL_SetVideoMode (int width, int height, int bpp, Uint32 flags) | |
| 573 { | |
| 574 SDL_VideoDevice *video, *this; | |
| 575 SDL_Surface *prev_mode, *mode; | |
| 576 int video_w; | |
| 577 int video_h; | |
| 578 int video_bpp; | |
| 579 int is_opengl; | |
| 580 SDL_GrabMode saved_grab; | |
| 581 | |
| 582 /* Start up the video driver, if necessary.. | |
| 583 WARNING: This is the only function protected this way! | |
| 584 */ | |
| 585 if ( ! current_video ) { | |
| 586 if ( SDL_Init(SDL_INIT_VIDEO|SDL_INIT_NOPARACHUTE) < 0 ) { | |
| 587 return(NULL); | |
| 588 } | |
| 589 } | |
| 590 this = video = current_video; | |
| 591 | |
|
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592 /* Default to the current width and height */ |
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593 if ( width == 0 ) { |
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594 width = video->info.current_w; |
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595 } |
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596 if ( height == 0 ) { |
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597 height = video->info.current_h; |
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598 } |
| 0 | 599 /* Default to the current video bpp */ |
| 600 if ( bpp == 0 ) { | |
| 601 flags |= SDL_ANYFORMAT; | |
| 602 bpp = SDL_VideoSurface->format->BitsPerPixel; | |
| 603 } | |
| 604 | |
| 605 /* Get a good video mode, the closest one possible */ | |
| 606 video_w = width; | |
| 607 video_h = height; | |
| 608 video_bpp = bpp; | |
| 609 if ( ! SDL_GetVideoMode(&video_w, &video_h, &video_bpp, flags) ) { | |
| 610 return(NULL); | |
| 611 } | |
| 612 | |
| 613 /* Check the requested flags */ | |
| 614 /* There's no palette in > 8 bits-per-pixel mode */ | |
| 615 if ( video_bpp > 8 ) { | |
| 616 flags &= ~SDL_HWPALETTE; | |
| 617 } | |
| 618 #if 0 | |
| 619 if ( (flags&SDL_FULLSCREEN) != SDL_FULLSCREEN ) { | |
| 620 /* There's no windowed double-buffering */ | |
| 621 flags &= ~SDL_DOUBLEBUF; | |
| 622 } | |
| 623 #endif | |
| 624 if ( (flags&SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) { | |
| 625 /* Use hardware surfaces when double-buffering */ | |
| 626 flags |= SDL_HWSURFACE; | |
| 627 } | |
| 628 | |
| 629 is_opengl = ( ( flags & SDL_OPENGL ) == SDL_OPENGL ); | |
| 630 if ( is_opengl ) { | |
| 631 /* These flags are for 2D video modes only */ | |
| 632 flags &= ~(SDL_HWSURFACE|SDL_DOUBLEBUF); | |
| 633 } | |
| 634 | |
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635 /* Reset the keyboard here so event callbacks can run */ |
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636 SDL_ResetKeyboard(); |
|
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637 SDL_ResetMouse(); |
| 1296 | 638 SDL_cursorstate &= ~CURSOR_USINGSW; |
|
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639 |
| 0 | 640 /* Clean up any previous video mode */ |
| 641 if ( SDL_PublicSurface != NULL ) { | |
| 642 SDL_PublicSurface = NULL; | |
| 643 } | |
| 644 if ( SDL_ShadowSurface != NULL ) { | |
| 645 SDL_Surface *ready_to_go; | |
| 646 ready_to_go = SDL_ShadowSurface; | |
| 647 SDL_ShadowSurface = NULL; | |
| 648 SDL_FreeSurface(ready_to_go); | |
| 649 } | |
| 650 if ( video->physpal ) { | |
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651 SDL_free(video->physpal->colors); |
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652 SDL_free(video->physpal); |
| 0 | 653 video->physpal = NULL; |
| 654 } | |
| 655 if( video->gammacols) { | |
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656 SDL_free(video->gammacols); |
| 0 | 657 video->gammacols = NULL; |
| 658 } | |
| 659 | |
| 660 /* Save the previous grab state and turn off grab for mode switch */ | |
| 661 saved_grab = SDL_WM_GrabInputOff(); | |
| 662 | |
| 663 /* Try to set the video mode, along with offset and clipping */ | |
| 664 prev_mode = SDL_VideoSurface; | |
| 665 SDL_LockCursor(); | |
| 666 SDL_VideoSurface = NULL; /* In case it's freed by driver */ | |
| 667 mode = video->SetVideoMode(this, prev_mode,video_w,video_h,video_bpp,flags); | |
| 668 if ( mode ) { /* Prevent resize events from mode change */ | |
| 1190 | 669 /* But not on OS/2 */ |
| 670 #ifndef __OS2__ | |
| 0 | 671 SDL_PrivateResize(mode->w, mode->h); |
| 1190 | 672 #endif |
|
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673 |
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674 /* Sam - If we asked for OpenGL mode, and didn't get it, fail */ |
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675 if ( is_opengl && !(mode->flags & SDL_OPENGL) ) { |
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676 mode = NULL; |
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677 SDL_SetError("OpenGL not available"); |
|
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678 } |
|
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679 } |
| 0 | 680 /* |
| 681 * rcg11292000 | |
| 682 * If you try to set an SDL_OPENGL surface, and fail to find a | |
| 683 * matching visual, then the next call to SDL_SetVideoMode() | |
| 684 * will segfault, since we no longer point to a dummy surface, | |
| 685 * but rather NULL. | |
| 686 * Sam 11/29/00 | |
| 687 * WARNING, we need to make sure that the previous mode hasn't | |
| 688 * already been freed by the video driver. What do we do in | |
| 689 * that case? Should we call SDL_VideoInit() again? | |
| 690 */ | |
| 691 SDL_VideoSurface = (mode != NULL) ? mode : prev_mode; | |
| 692 | |
| 693 if ( (mode != NULL) && (!is_opengl) ) { | |
| 694 /* Sanity check */ | |
| 695 if ( (mode->w < width) || (mode->h < height) ) { | |
| 696 SDL_SetError("Video mode smaller than requested"); | |
| 697 return(NULL); | |
| 698 } | |
| 699 | |
| 700 /* If we have a palettized surface, create a default palette */ | |
| 701 if ( mode->format->palette ) { | |
|
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702 SDL_PixelFormat *vf = mode->format; |
| 0 | 703 SDL_DitherColors(vf->palette->colors, vf->BitsPerPixel); |
| 704 video->SetColors(this, 0, vf->palette->ncolors, | |
| 705 vf->palette->colors); | |
| 706 } | |
| 707 | |
| 708 /* Clear the surface to black */ | |
| 709 video->offset_x = 0; | |
| 710 video->offset_y = 0; | |
| 711 mode->offset = 0; | |
| 712 SDL_SetClipRect(mode, NULL); | |
| 713 SDL_ClearSurface(mode); | |
| 714 | |
| 715 /* Now adjust the offsets to match the desired mode */ | |
| 716 video->offset_x = (mode->w-width)/2; | |
| 717 video->offset_y = (mode->h-height)/2; | |
| 718 mode->offset = video->offset_y*mode->pitch + | |
| 719 video->offset_x*mode->format->BytesPerPixel; | |
| 720 #ifdef DEBUG_VIDEO | |
| 721 fprintf(stderr, | |
| 722 "Requested mode: %dx%dx%d, obtained mode %dx%dx%d (offset %d)\n", | |
| 723 width, height, bpp, | |
| 724 mode->w, mode->h, mode->format->BitsPerPixel, mode->offset); | |
| 725 #endif | |
| 726 mode->w = width; | |
| 727 mode->h = height; | |
| 728 SDL_SetClipRect(mode, NULL); | |
| 729 } | |
| 730 SDL_ResetCursor(); | |
| 731 SDL_UnlockCursor(); | |
| 732 | |
| 733 /* If we failed setting a video mode, return NULL... (Uh Oh!) */ | |
| 734 if ( mode == NULL ) { | |
| 735 return(NULL); | |
| 736 } | |
| 737 | |
| 738 /* If there is no window manager, set the SDL_NOFRAME flag */ | |
| 739 if ( ! video->info.wm_available ) { | |
| 740 mode->flags |= SDL_NOFRAME; | |
| 741 } | |
| 742 | |
| 743 /* Reset the mouse cursor and grab for new video mode */ | |
| 744 SDL_SetCursor(NULL); | |
| 745 if ( video->UpdateMouse ) { | |
| 746 video->UpdateMouse(this); | |
| 747 } | |
| 748 SDL_WM_GrabInput(saved_grab); | |
| 749 SDL_GetRelativeMouseState(NULL, NULL); /* Clear first large delta */ | |
| 750 | |
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751 #if SDL_VIDEO_OPENGL |
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752 /* Load GL symbols (before MakeCurrent, where we need glGetString). */ |
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753 if ( flags & (SDL_OPENGL | SDL_OPENGLBLIT) ) { |
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754 |
|
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755 #if defined(__QNXNTO__) && (_NTO_VERSION < 630) |
|
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756 #define __SDL_NOGETPROCADDR__ |
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757 #elif defined(__MINT__) |
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758 #define __SDL_NOGETPROCADDR__ |
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759 #endif |
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760 #ifdef __SDL_NOGETPROCADDR__ |
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761 #define SDL_PROC(ret,func,params) video->func=func; |
|
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762 #else |
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763 #define SDL_PROC(ret,func,params) \ |
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764 do { \ |
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765 video->func = SDL_GL_GetProcAddress(#func); \ |
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766 if ( ! video->func ) { \ |
|
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767 SDL_SetError("Couldn't load GL function %s: %s\n", #func, SDL_GetError()); \ |
|
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768 return(NULL); \ |
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769 } \ |
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770 } while ( 0 ); |
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771 |
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772 #endif /* __SDL_NOGETPROCADDR__ */ |
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773 |
|
650
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774 #include "SDL_glfuncs.h" |
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775 #undef SDL_PROC |
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776 } |
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777 #endif /* SDL_VIDEO_OPENGL */ |
|
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778 |
| 0 | 779 /* If we're running OpenGL, make the context current */ |
| 780 if ( (video->screen->flags & SDL_OPENGL) && | |
| 781 video->GL_MakeCurrent ) { | |
| 782 if ( video->GL_MakeCurrent(this) < 0 ) { | |
| 783 return(NULL); | |
| 784 } | |
| 785 } | |
| 786 | |
| 787 /* Set up a fake SDL surface for OpenGL "blitting" */ | |
| 788 if ( (flags & SDL_OPENGLBLIT) == SDL_OPENGLBLIT ) { | |
| 789 /* Load GL functions for performing the texture updates */ | |
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790 #if SDL_VIDEO_OPENGL |
| 0 | 791 |
| 792 /* Create a software surface for blitting */ | |
| 793 #ifdef GL_VERSION_1_2 | |
| 794 /* If the implementation either supports the packed pixels | |
| 795 extension, or implements the core OpenGL 1.2 API, it will | |
| 796 support the GL_UNSIGNED_SHORT_5_6_5 texture format. | |
| 797 */ | |
| 798 if ( (bpp == 16) && | |
|
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799 (SDL_strstr((const char *)video->glGetString(GL_EXTENSIONS), "GL_EXT_packed_pixels") || |
|
1341
d02b552e5304
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Sam Lantinga <slouken@libsdl.org>
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|
800 (SDL_atof((const char *)video->glGetString(GL_VERSION)) >= 1.2f)) |
|
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|
801 ) { |
| 0 | 802 video->is_32bit = 0; |
| 803 SDL_VideoSurface = SDL_CreateRGBSurface( | |
| 804 flags, | |
| 805 width, | |
| 806 height, | |
| 807 16, | |
| 808 31 << 11, | |
| 809 63 << 5, | |
| 810 31, | |
| 811 0 | |
| 812 ); | |
| 813 } | |
| 814 else | |
| 815 #endif /* OpenGL 1.2 */ | |
| 816 { | |
| 817 video->is_32bit = 1; | |
| 818 SDL_VideoSurface = SDL_CreateRGBSurface( | |
| 819 flags, | |
| 820 width, | |
| 821 height, | |
| 822 32, | |
| 823 #if SDL_BYTEORDER == SDL_LIL_ENDIAN | |
| 824 0x000000FF, | |
| 825 0x0000FF00, | |
| 826 0x00FF0000, | |
| 827 0xFF000000 | |
| 828 #else | |
| 829 0xFF000000, | |
| 830 0x00FF0000, | |
| 831 0x0000FF00, | |
| 832 0x000000FF | |
| 833 #endif | |
| 834 ); | |
| 835 } | |
| 836 if ( ! SDL_VideoSurface ) { | |
| 837 return(NULL); | |
| 838 } | |
| 839 SDL_VideoSurface->flags = mode->flags | SDL_OPENGLBLIT; | |
| 840 | |
| 841 /* Free the original video mode surface (is this safe?) */ | |
| 842 SDL_FreeSurface(mode); | |
| 843 | |
|
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844 /* Set the surface completely opaque & white by default */ |
|
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|
845 SDL_memset( SDL_VideoSurface->pixels, 255, SDL_VideoSurface->h * SDL_VideoSurface->pitch ); |
| 0 | 846 video->glGenTextures( 1, &video->texture ); |
| 847 video->glBindTexture( GL_TEXTURE_2D, video->texture ); | |
| 848 video->glTexImage2D( | |
| 849 GL_TEXTURE_2D, | |
| 850 0, | |
| 851 video->is_32bit ? GL_RGBA : GL_RGB, | |
| 852 256, | |
| 853 256, | |
| 854 0, | |
| 855 video->is_32bit ? GL_RGBA : GL_RGB, | |
| 856 #ifdef GL_VERSION_1_2 | |
| 857 video->is_32bit ? GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT_5_6_5, | |
| 858 #else | |
| 859 GL_UNSIGNED_BYTE, | |
| 860 #endif | |
| 861 NULL); | |
| 862 | |
| 863 video->UpdateRects = SDL_GL_UpdateRectsLock; | |
| 864 #else | |
|
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|
865 SDL_SetError("Somebody forgot to #define SDL_VIDEO_OPENGL"); |
| 0 | 866 return(NULL); |
| 867 #endif | |
| 868 } | |
| 869 | |
| 870 /* Create a shadow surface if necessary */ | |
| 871 /* There are three conditions under which we create a shadow surface: | |
| 872 1. We need a particular bits-per-pixel that we didn't get. | |
| 873 2. We need a hardware palette and didn't get one. | |
| 874 3. We need a software surface and got a hardware surface. | |
| 875 */ | |
| 876 if ( !(SDL_VideoSurface->flags & SDL_OPENGL) && | |
| 877 ( | |
| 878 ( !(flags&SDL_ANYFORMAT) && | |
| 879 (SDL_VideoSurface->format->BitsPerPixel != bpp)) || | |
| 880 ( (flags&SDL_HWPALETTE) && | |
| 881 !(SDL_VideoSurface->flags&SDL_HWPALETTE)) || | |
| 882 /* If the surface is in hardware, video writes are visible | |
| 883 as soon as they are performed, so we need to buffer them | |
| 884 */ | |
| 885 ( ((flags&SDL_HWSURFACE) == SDL_SWSURFACE) && | |
|
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886 (SDL_VideoSurface->flags&SDL_HWSURFACE)) || |
|
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887 ( (flags&SDL_DOUBLEBUF) && |
|
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888 (SDL_VideoSurface->flags&SDL_HWSURFACE) && |
|
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889 !(SDL_VideoSurface->flags&SDL_DOUBLEBUF)) |
| 0 | 890 ) ) { |
| 891 SDL_CreateShadowSurface(bpp); | |
| 892 if ( SDL_ShadowSurface == NULL ) { | |
| 893 SDL_SetError("Couldn't create shadow surface"); | |
| 894 return(NULL); | |
| 895 } | |
| 896 SDL_PublicSurface = SDL_ShadowSurface; | |
| 897 } else { | |
| 898 SDL_PublicSurface = SDL_VideoSurface; | |
| 899 } | |
| 900 video->info.vfmt = SDL_VideoSurface->format; | |
|
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901 video->info.current_w = SDL_VideoSurface->w; |
|
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902 video->info.current_h = SDL_VideoSurface->h; |
| 0 | 903 |
| 904 /* We're done! */ | |
| 905 return(SDL_PublicSurface); | |
| 906 } | |
| 907 | |
| 908 /* | |
| 909 * Convert a surface into the video pixel format. | |
| 910 */ | |
| 911 SDL_Surface * SDL_DisplayFormat (SDL_Surface *surface) | |
| 912 { | |
| 913 Uint32 flags; | |
| 914 | |
| 915 if ( ! SDL_PublicSurface ) { | |
| 916 SDL_SetError("No video mode has been set"); | |
| 917 return(NULL); | |
| 918 } | |
| 919 /* Set the flags appropriate for copying to display surface */ | |
|
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920 if (((SDL_PublicSurface->flags&SDL_HWSURFACE) == SDL_HWSURFACE) && current_video->info.blit_hw) |
|
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921 flags = SDL_HWSURFACE; |
|
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922 else |
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923 flags = SDL_SWSURFACE; |
| 0 | 924 #ifdef AUTORLE_DISPLAYFORMAT |
| 925 flags |= (surface->flags & (SDL_SRCCOLORKEY|SDL_SRCALPHA)); | |
| 926 flags |= SDL_RLEACCELOK; | |
| 927 #else | |
| 928 flags |= surface->flags & (SDL_SRCCOLORKEY|SDL_SRCALPHA|SDL_RLEACCELOK); | |
| 929 #endif | |
| 930 return(SDL_ConvertSurface(surface, SDL_PublicSurface->format, flags)); | |
| 931 } | |
| 932 | |
| 933 /* | |
| 934 * Convert a surface into a format that's suitable for blitting to | |
| 935 * the screen, but including an alpha channel. | |
| 936 */ | |
| 937 SDL_Surface *SDL_DisplayFormatAlpha(SDL_Surface *surface) | |
| 938 { | |
| 939 SDL_PixelFormat *vf; | |
| 940 SDL_PixelFormat *format; | |
| 941 SDL_Surface *converted; | |
| 942 Uint32 flags; | |
| 943 /* default to ARGB8888 */ | |
| 944 Uint32 amask = 0xff000000; | |
| 945 Uint32 rmask = 0x00ff0000; | |
| 946 Uint32 gmask = 0x0000ff00; | |
| 947 Uint32 bmask = 0x000000ff; | |
| 948 | |
| 949 if ( ! SDL_PublicSurface ) { | |
| 950 SDL_SetError("No video mode has been set"); | |
| 951 return(NULL); | |
| 952 } | |
| 953 vf = SDL_PublicSurface->format; | |
| 954 | |
| 955 switch(vf->BytesPerPixel) { | |
| 956 case 2: | |
| 957 /* For XGY5[56]5, use, AXGY8888, where {X, Y} = {R, B}. | |
| 958 For anything else (like ARGB4444) it doesn't matter | |
| 959 since we have no special code for it anyway */ | |
| 960 if ( (vf->Rmask == 0x1f) && | |
| 961 (vf->Bmask == 0xf800 || vf->Bmask == 0x7c00)) { | |
| 962 rmask = 0xff; | |
| 963 bmask = 0xff0000; | |
| 964 } | |
| 965 break; | |
| 966 | |
| 967 case 3: | |
| 968 case 4: | |
| 969 /* Keep the video format, as long as the high 8 bits are | |
| 970 unused or alpha */ | |
| 971 if ( (vf->Rmask == 0xff) && (vf->Bmask == 0xff0000) ) { | |
| 972 rmask = 0xff; | |
| 973 bmask = 0xff0000; | |
| 974 } | |
| 975 break; | |
| 976 | |
| 977 default: | |
| 978 /* We have no other optimised formats right now. When/if a new | |
| 979 optimised alpha format is written, add the converter here */ | |
| 980 break; | |
| 981 } | |
| 982 format = SDL_AllocFormat(32, rmask, gmask, bmask, amask); | |
| 983 flags = SDL_PublicSurface->flags & SDL_HWSURFACE; | |
| 984 flags |= surface->flags & (SDL_SRCALPHA | SDL_RLEACCELOK); | |
| 985 converted = SDL_ConvertSurface(surface, format, flags); | |
| 986 SDL_FreeFormat(format); | |
| 987 return(converted); | |
| 988 } | |
| 989 | |
| 990 /* | |
| 991 * Update a specific portion of the physical screen | |
| 992 */ | |
| 993 void SDL_UpdateRect(SDL_Surface *screen, Sint32 x, Sint32 y, Uint32 w, Uint32 h) | |
| 994 { | |
| 995 if ( screen ) { | |
| 996 SDL_Rect rect; | |
| 997 | |
| 998 /* Perform some checking */ | |
| 999 if ( w == 0 ) | |
| 1000 w = screen->w; | |
| 1001 if ( h == 0 ) | |
| 1002 h = screen->h; | |
| 1003 if ( (int)(x+w) > screen->w ) | |
| 1004 return; | |
| 1005 if ( (int)(y+h) > screen->h ) | |
| 1006 return; | |
| 1007 | |
| 1008 /* Fill the rectangle */ | |
|
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1009 rect.x = (Sint16)x; |
|
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1010 rect.y = (Sint16)y; |
|
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1011 rect.w = (Uint16)w; |
|
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1012 rect.h = (Uint16)h; |
| 0 | 1013 SDL_UpdateRects(screen, 1, &rect); |
| 1014 } | |
| 1015 } | |
| 1016 void SDL_UpdateRects (SDL_Surface *screen, int numrects, SDL_Rect *rects) | |
| 1017 { | |
| 1018 int i; | |
| 1019 SDL_VideoDevice *video = current_video; | |
| 1020 SDL_VideoDevice *this = current_video; | |
| 1021 | |
|
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1022 if ( (screen->flags & (SDL_OPENGL | SDL_OPENGLBLIT)) == SDL_OPENGL ) { |
|
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1023 SDL_SetError("OpenGL active, use SDL_GL_SwapBuffers()"); |
|
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1024 return; |
|
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1025 } |
| 0 | 1026 if ( screen == SDL_ShadowSurface ) { |
| 1027 /* Blit the shadow surface using saved mapping */ | |
|
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1028 SDL_Palette *pal = screen->format->palette; |
| 0 | 1029 SDL_Color *saved_colors = NULL; |
|
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1030 if ( pal && !(SDL_VideoSurface->flags & SDL_HWPALETTE) ) { |
| 0 | 1031 /* simulated 8bpp, use correct physical palette */ |
| 1032 saved_colors = pal->colors; | |
| 1033 if ( video->gammacols ) { | |
| 1034 /* gamma-corrected palette */ | |
| 1035 pal->colors = video->gammacols; | |
| 1036 } else if ( video->physpal ) { | |
| 1037 /* physical palette different from logical */ | |
| 1038 pal->colors = video->physpal->colors; | |
| 1039 } | |
| 1040 } | |
| 1041 if ( SHOULD_DRAWCURSOR(SDL_cursorstate) ) { | |
| 1042 SDL_LockCursor(); | |
| 1043 SDL_DrawCursor(SDL_ShadowSurface); | |
| 1044 for ( i=0; i<numrects; ++i ) { | |
| 1045 SDL_LowerBlit(SDL_ShadowSurface, &rects[i], | |
| 1046 SDL_VideoSurface, &rects[i]); | |
| 1047 } | |
| 1048 SDL_EraseCursor(SDL_ShadowSurface); | |
| 1049 SDL_UnlockCursor(); | |
| 1050 } else { | |
| 1051 for ( i=0; i<numrects; ++i ) { | |
| 1052 SDL_LowerBlit(SDL_ShadowSurface, &rects[i], | |
| 1053 SDL_VideoSurface, &rects[i]); | |
| 1054 } | |
| 1055 } | |
|
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1056 if ( saved_colors ) { |
| 0 | 1057 pal->colors = saved_colors; |
|
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1058 } |
| 0 | 1059 |
| 1060 /* Fall through to video surface update */ | |
| 1061 screen = SDL_VideoSurface; | |
| 1062 } | |
| 1063 if ( screen == SDL_VideoSurface ) { | |
| 1064 /* Update the video surface */ | |
| 1065 if ( screen->offset ) { | |
| 1066 for ( i=0; i<numrects; ++i ) { | |
| 1067 rects[i].x += video->offset_x; | |
| 1068 rects[i].y += video->offset_y; | |
| 1069 } | |
| 1070 video->UpdateRects(this, numrects, rects); | |
| 1071 for ( i=0; i<numrects; ++i ) { | |
| 1072 rects[i].x -= video->offset_x; | |
| 1073 rects[i].y -= video->offset_y; | |
| 1074 } | |
| 1075 } else { | |
| 1076 video->UpdateRects(this, numrects, rects); | |
| 1077 } | |
| 1078 } | |
| 1079 } | |
| 1080 | |
| 1081 /* | |
| 1082 * Performs hardware double buffering, if possible, or a full update if not. | |
| 1083 */ | |
| 1084 int SDL_Flip(SDL_Surface *screen) | |
| 1085 { | |
| 1086 SDL_VideoDevice *video = current_video; | |
| 1087 /* Copy the shadow surface to the video surface */ | |
| 1088 if ( screen == SDL_ShadowSurface ) { | |
| 1089 SDL_Rect rect; | |
|
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|
1090 SDL_Palette *pal = screen->format->palette; |
| 0 | 1091 SDL_Color *saved_colors = NULL; |
|
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|
1092 if ( pal && !(SDL_VideoSurface->flags & SDL_HWPALETTE) ) { |
| 0 | 1093 /* simulated 8bpp, use correct physical palette */ |
| 1094 saved_colors = pal->colors; | |
| 1095 if ( video->gammacols ) { | |
| 1096 /* gamma-corrected palette */ | |
| 1097 pal->colors = video->gammacols; | |
| 1098 } else if ( video->physpal ) { | |
| 1099 /* physical palette different from logical */ | |
| 1100 pal->colors = video->physpal->colors; | |
| 1101 } | |
| 1102 } | |
| 1103 | |
| 1104 rect.x = 0; | |
| 1105 rect.y = 0; | |
| 1106 rect.w = screen->w; | |
| 1107 rect.h = screen->h; | |
|
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1108 if ( SHOULD_DRAWCURSOR(SDL_cursorstate) ) { |
|
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1109 SDL_LockCursor(); |
|
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1110 SDL_DrawCursor(SDL_ShadowSurface); |
|
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1111 SDL_LowerBlit(SDL_ShadowSurface, &rect, |
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1112 SDL_VideoSurface, &rect); |
|
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1113 SDL_EraseCursor(SDL_ShadowSurface); |
|
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1114 SDL_UnlockCursor(); |
|
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1115 } else { |
|
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1116 SDL_LowerBlit(SDL_ShadowSurface, &rect, |
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1117 SDL_VideoSurface, &rect); |
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1118 } |
|
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1119 if ( saved_colors ) { |
|
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1120 pal->colors = saved_colors; |
|
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1121 } |
| 0 | 1122 |
|
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1123 /* Fall through to video surface update */ |
| 0 | 1124 screen = SDL_VideoSurface; |
| 1125 } | |
| 1126 if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) { | |
| 1127 SDL_VideoDevice *this = current_video; | |
| 1128 return(video->FlipHWSurface(this, SDL_VideoSurface)); | |
| 1129 } else { | |
| 1130 SDL_UpdateRect(screen, 0, 0, 0, 0); | |
| 1131 } | |
| 1132 return(0); | |
| 1133 } | |
| 1134 | |
| 1135 static void SetPalette_logical(SDL_Surface *screen, SDL_Color *colors, | |
| 1136 int firstcolor, int ncolors) | |
| 1137 { | |
|
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1138 SDL_Palette *pal = screen->format->palette; |
| 0 | 1139 SDL_Palette *vidpal; |
| 1140 | |
| 1141 if ( colors != (pal->colors + firstcolor) ) { | |
|
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1142 SDL_memcpy(pal->colors + firstcolor, colors, |
| 0 | 1143 ncolors * sizeof(*colors)); |
| 1144 } | |
| 1145 | |
| 1146 vidpal = SDL_VideoSurface->format->palette; | |
| 1147 if ( (screen == SDL_ShadowSurface) && vidpal ) { | |
|
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1148 /* |
| 0 | 1149 * This is a shadow surface, and the physical |
| 1150 * framebuffer is also indexed. Propagate the | |
| 1151 * changes to its logical palette so that | |
| 1152 * updates are always identity blits | |
| 1153 */ | |
|
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1154 SDL_memcpy(vidpal->colors + firstcolor, colors, |
| 0 | 1155 ncolors * sizeof(*colors)); |
| 1156 } | |
| 1157 SDL_FormatChanged(screen); | |
| 1158 } | |
| 1159 | |
| 1160 static int SetPalette_physical(SDL_Surface *screen, | |
| 1161 SDL_Color *colors, int firstcolor, int ncolors) | |
| 1162 { | |
| 1163 SDL_VideoDevice *video = current_video; | |
| 1164 int gotall = 1; | |
| 1165 | |
| 1166 if ( video->physpal ) { | |
| 1167 /* We need to copy the new colors, since we haven't | |
| 1168 * already done the copy in the logical set above. | |
| 1169 */ | |
|
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|
1170 SDL_memcpy(video->physpal->colors + firstcolor, |
| 0 | 1171 colors, ncolors * sizeof(*colors)); |
| 1172 } | |
| 1173 if ( screen == SDL_ShadowSurface ) { | |
| 1174 if ( SDL_VideoSurface->flags & SDL_HWPALETTE ) { | |
| 1175 /* | |
| 1176 * The real screen is also indexed - set its physical | |
| 1177 * palette. The physical palette does not include the | |
| 1178 * gamma modification, we apply it directly instead, | |
| 1179 * but this only happens if we have hardware palette. | |
| 1180 */ | |
| 1181 screen = SDL_VideoSurface; | |
| 1182 } else { | |
| 1183 /* | |
| 1184 * The video surface is not indexed - invalidate any | |
| 1185 * active shadow-to-video blit mappings. | |
| 1186 */ | |
| 1187 if ( screen->map->dst == SDL_VideoSurface ) { | |
| 1188 SDL_InvalidateMap(screen->map); | |
| 1189 } | |
| 1190 if ( video->gamma ) { | |
| 1191 if( ! video->gammacols ) { | |
| 1192 SDL_Palette *pp = video->physpal; | |
| 1193 if(!pp) | |
| 1194 pp = screen->format->palette; | |
|
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|
1195 video->gammacols = SDL_malloc(pp->ncolors |
| 0 | 1196 * sizeof(SDL_Color)); |
| 1197 SDL_ApplyGamma(video->gamma, | |
| 1198 pp->colors, | |
| 1199 video->gammacols, | |
| 1200 pp->ncolors); | |
| 1201 } else { | |
| 1202 SDL_ApplyGamma(video->gamma, colors, | |
| 1203 video->gammacols | |
| 1204 + firstcolor, | |
| 1205 ncolors); | |
| 1206 } | |
| 1207 } | |
| 1208 SDL_UpdateRect(screen, 0, 0, 0, 0); | |
| 1209 } | |
| 1210 } | |
| 1211 | |
| 1212 if ( screen == SDL_VideoSurface ) { | |
| 1213 SDL_Color gcolors[256]; | |
| 1214 | |
|
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Date: Sun, 27 Jul 2003 22:37:59 +0200
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|
1215 if ( video->gamma ) { |
|
66c02f83f5bf
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656
diff
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|
1216 SDL_ApplyGamma(video->gamma, colors, gcolors, ncolors); |
| 0 | 1217 colors = gcolors; |
| 1218 } | |
| 1219 gotall = video->SetColors(video, firstcolor, ncolors, colors); | |
| 1220 if ( ! gotall ) { | |
| 1221 /* The video flags shouldn't have SDL_HWPALETTE, and | |
| 1222 the video driver is responsible for copying back the | |
| 1223 correct colors into the video surface palette. | |
| 1224 */ | |
| 1225 ; | |
| 1226 } | |
| 1227 SDL_CursorPaletteChanged(); | |
| 1228 } | |
| 1229 return gotall; | |
| 1230 } | |
| 1231 | |
| 1232 /* | |
| 1233 * Set the physical and/or logical colormap of a surface: | |
| 1234 * Only the screen has a physical colormap. It determines what is actually | |
| 1235 * sent to the display. | |
| 1236 * The logical colormap is used to map blits to/from the surface. | |
| 1237 * 'which' is one or both of SDL_LOGPAL, SDL_PHYSPAL | |
| 1238 * | |
| 1239 * Return nonzero if all colours were set as requested, or 0 otherwise. | |
| 1240 */ | |
| 1241 int SDL_SetPalette(SDL_Surface *screen, int which, | |
| 1242 SDL_Color *colors, int firstcolor, int ncolors) | |
| 1243 { | |
|
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|
1244 SDL_Palette *pal; |
| 0 | 1245 int gotall; |
| 1246 int palsize; | |
| 1247 | |
| 34 | 1248 if ( ! current_video ) { |
| 1249 return 0; | |
| 1250 } | |
| 0 | 1251 if ( screen != SDL_PublicSurface ) { |
|
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|
1252 /* only screens have physical palettes */ |
|
66c02f83f5bf
Date: Sun, 27 Jul 2003 22:37:59 +0200
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|
1253 which &= ~SDL_PHYSPAL; |
| 0 | 1254 } else if( (screen->flags & SDL_HWPALETTE) != SDL_HWPALETTE ) { |
|
662
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Sam Lantinga <slouken@libsdl.org>
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|
1255 /* hardware palettes required for split colormaps */ |
|
66c02f83f5bf
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656
diff
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|
1256 which |= SDL_PHYSPAL | SDL_LOGPAL; |
| 0 | 1257 } |
| 1258 | |
| 1259 /* Verify the parameters */ | |
| 1260 pal = screen->format->palette; | |
| 1261 if( !pal ) { | |
|
662
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Date: Sun, 27 Jul 2003 22:37:59 +0200
Sam Lantinga <slouken@libsdl.org>
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|
1262 return 0; /* not a palettized surface */ |
| 0 | 1263 } |
| 1264 gotall = 1; | |
| 1265 palsize = 1 << screen->format->BitsPerPixel; | |
| 1266 if ( ncolors > (palsize - firstcolor) ) { | |
|
662
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Date: Sun, 27 Jul 2003 22:37:59 +0200
Sam Lantinga <slouken@libsdl.org>
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656
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|
1267 ncolors = (palsize - firstcolor); |
| 0 | 1268 gotall = 0; |
| 1269 } | |
| 1270 | |
| 1271 if ( which & SDL_LOGPAL ) { | |
| 1272 /* | |
| 1273 * Logical palette change: The actual screen isn't affected, | |
| 1274 * but the internal colormap is altered so that the | |
| 1275 * interpretation of the pixel values (for blits etc) is | |
| 1276 * changed. | |
| 1277 */ | |
|
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|
1278 SetPalette_logical(screen, colors, firstcolor, ncolors); |
| 0 | 1279 } |
| 1280 if ( which & SDL_PHYSPAL ) { | |
| 1281 SDL_VideoDevice *video = current_video; | |
|
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Date: Sun, 27 Jul 2003 22:37:59 +0200
Sam Lantinga <slouken@libsdl.org>
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656
diff
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|
1282 /* |
| 0 | 1283 * Physical palette change: This doesn't affect the |
| 1284 * program's idea of what the screen looks like, but changes | |
| 1285 * its actual appearance. | |
| 1286 */ | |
|
662
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diff
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|
1287 if(!video) |
|
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|
1288 return gotall; /* video not yet initialized */ |
| 0 | 1289 if(!video->physpal && !(which & SDL_LOGPAL) ) { |
| 1290 /* Lazy physical palette allocation */ | |
|
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Sam Lantinga <slouken@libsdl.org>
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656
diff
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|
1291 int size; |
|
1336
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Sam Lantinga <slouken@libsdl.org>
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1330
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|
1292 SDL_Palette *pp = SDL_malloc(sizeof(*pp)); |
|
944
cdea7cbc3e23
Date: Wed, 28 Jul 2004 14:56:57 +0800
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parents:
916
diff
changeset
|
1293 if ( !pp ) { |
|
cdea7cbc3e23
Date: Wed, 28 Jul 2004 14:56:57 +0800
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|
1294 return 0; |
|
cdea7cbc3e23
Date: Wed, 28 Jul 2004 14:56:57 +0800
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
1295 } |
| 0 | 1296 current_video->physpal = pp; |
| 1297 pp->ncolors = pal->ncolors; | |
| 1298 size = pp->ncolors * sizeof(SDL_Color); | |
|
1336
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1330
diff
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|
1299 pp->colors = SDL_malloc(size); |
|
944
cdea7cbc3e23
Date: Wed, 28 Jul 2004 14:56:57 +0800
Sam Lantinga <slouken@libsdl.org>
parents:
916
diff
changeset
|
1300 if ( !pp->colors ) { |
|
cdea7cbc3e23
Date: Wed, 28 Jul 2004 14:56:57 +0800
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diff
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|
1301 return 0; |
|
cdea7cbc3e23
Date: Wed, 28 Jul 2004 14:56:57 +0800
Sam Lantinga <slouken@libsdl.org>
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diff
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|
1302 } |
|
1336
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Sam Lantinga <slouken@libsdl.org>
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1330
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|
1303 SDL_memcpy(pp->colors, pal->colors, size); |
| 0 | 1304 } |
| 1305 if ( ! SetPalette_physical(screen, | |
| 1306 colors, firstcolor, ncolors) ) { | |
| 1307 gotall = 0; | |
| 1308 } | |
| 1309 } | |
| 1310 return gotall; | |
| 1311 } | |
| 1312 | |
| 1313 int SDL_SetColors(SDL_Surface *screen, SDL_Color *colors, int firstcolor, | |
| 1314 int ncolors) | |
| 1315 { | |
|
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656
diff
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|
1316 return SDL_SetPalette(screen, SDL_LOGPAL | SDL_PHYSPAL, |
| 0 | 1317 colors, firstcolor, ncolors); |
| 1318 } | |
| 1319 | |
| 1320 /* | |
| 1321 * Clean up the video subsystem | |
| 1322 */ | |
| 1323 void SDL_VideoQuit (void) | |
| 1324 { | |
| 1325 SDL_Surface *ready_to_go; | |
| 1326 | |
| 1327 if ( current_video ) { | |
| 1328 SDL_VideoDevice *video = current_video; | |
| 1329 SDL_VideoDevice *this = current_video; | |
| 1330 | |
| 1331 /* Halt event processing before doing anything else */ | |
| 1332 SDL_StopEventLoop(); | |
| 1333 | |
| 1334 /* Clean up allocated window manager items */ | |
| 1335 if ( SDL_PublicSurface ) { | |
| 1336 SDL_PublicSurface = NULL; | |
| 1337 } | |
| 1338 SDL_CursorQuit(); | |
| 1339 | |
| 1340 /* Just in case... */ | |
| 1341 SDL_WM_GrabInputOff(); | |
| 1342 | |
| 1343 /* Clean up the system video */ | |
| 1344 video->VideoQuit(this); | |
| 1345 | |
| 1346 /* Free any lingering surfaces */ | |
| 1347 ready_to_go = SDL_ShadowSurface; | |
| 1348 SDL_ShadowSurface = NULL; | |
| 1349 SDL_FreeSurface(ready_to_go); | |
| 1350 if ( SDL_VideoSurface != NULL ) { | |
| 1351 ready_to_go = SDL_VideoSurface; | |
| 1352 SDL_VideoSurface = NULL; | |
| 1353 SDL_FreeSurface(ready_to_go); | |
| 1354 } | |
| 1355 SDL_PublicSurface = NULL; | |
| 1356 | |
| 1357 /* Clean up miscellaneous memory */ | |
| 1358 if ( video->physpal ) { | |
|
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|
1359 SDL_free(video->physpal->colors); |
|
3692456e7b0f
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Sam Lantinga <slouken@libsdl.org>
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1330
diff
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|
1360 SDL_free(video->physpal); |
| 0 | 1361 video->physpal = NULL; |
| 1362 } | |
| 1363 if ( video->gammacols ) { | |
|
1336
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|
1364 SDL_free(video->gammacols); |
| 0 | 1365 video->gammacols = NULL; |
| 1366 } | |
| 1367 if ( video->gamma ) { | |
|
1336
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Sam Lantinga <slouken@libsdl.org>
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1330
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|
1368 SDL_free(video->gamma); |
| 0 | 1369 video->gamma = NULL; |
| 1370 } | |
|
58
bd6b0a910a65
* Removed fullscreen menu option from the "Window" menu
Sam Lantinga <slouken@lokigames.com>
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diff
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|
1371 if ( video->wm_title != NULL ) { |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
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diff
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|
1372 SDL_free(video->wm_title); |
|
58
bd6b0a910a65
* Removed fullscreen menu option from the "Window" menu
Sam Lantinga <slouken@lokigames.com>
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diff
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|
1373 video->wm_title = NULL; |
| 0 | 1374 } |
|
58
bd6b0a910a65
* Removed fullscreen menu option from the "Window" menu
Sam Lantinga <slouken@lokigames.com>
parents:
47
diff
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|
1375 if ( video->wm_icon != NULL ) { |
|
1336
3692456e7b0f
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|
1376 SDL_free(video->wm_icon); |
|
58
bd6b0a910a65
* Removed fullscreen menu option from the "Window" menu
Sam Lantinga <slouken@lokigames.com>
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47
diff
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|
1377 video->wm_icon = NULL; |
| 0 | 1378 } |
| 1379 | |
| 1380 /* Finish cleaning up video subsystem */ | |
| 1381 video->free(this); | |
| 1382 current_video = NULL; | |
| 1383 } | |
| 1384 return; | |
| 1385 } | |
| 1386 | |
| 1387 /* Load the GL driver library */ | |
| 1388 int SDL_GL_LoadLibrary(const char *path) | |
| 1389 { | |
| 1390 SDL_VideoDevice *video = current_video; | |
| 1391 SDL_VideoDevice *this = current_video; | |
| 1392 int retval; | |
| 1393 | |
| 1394 retval = -1; | |
|
423
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More correct error reported when calling SDL_GL_LoadLibrary() without
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|
1395 if ( video == NULL ) { |
|
d1565c52ded5
More correct error reported when calling SDL_GL_LoadLibrary() without
Ryan C. Gordon <icculus@icculus.org>
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diff
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|
1396 SDL_SetError("Video subsystem has not been initialized"); |
| 0 | 1397 } else { |
|
423
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More correct error reported when calling SDL_GL_LoadLibrary() without
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|
1398 if ( video->GL_LoadLibrary ) { |
|
d1565c52ded5
More correct error reported when calling SDL_GL_LoadLibrary() without
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|
1399 retval = video->GL_LoadLibrary(this, path); |
|
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|
1400 } else { |
|
d1565c52ded5
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|
1401 SDL_SetError("No dynamic GL support in video driver"); |
|
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|
1402 } |
| 0 | 1403 } |
| 1404 return(retval); | |
| 1405 } | |
| 1406 | |
| 1407 void *SDL_GL_GetProcAddress(const char* proc) | |
| 1408 { | |
| 1409 SDL_VideoDevice *video = current_video; | |
| 1410 SDL_VideoDevice *this = current_video; | |
| 1411 void *func; | |
| 1412 | |
| 1413 func = NULL; | |
| 1414 if ( video->GL_GetProcAddress ) { | |
| 1415 if ( video->gl_config.driver_loaded ) { | |
| 1416 func = video->GL_GetProcAddress(this, proc); | |
| 1417 } else { | |
| 1418 SDL_SetError("No GL driver has been loaded"); | |
| 1419 } | |
| 1420 } else { | |
| 1421 SDL_SetError("No dynamic GL support in video driver"); | |
| 1422 } | |
| 1423 return func; | |
| 1424 } | |
| 1425 | |
| 1426 /* Set the specified GL attribute for setting up a GL video mode */ | |
| 1427 int SDL_GL_SetAttribute( SDL_GLattr attr, int value ) | |
| 1428 { | |
| 1429 int retval; | |
| 1430 SDL_VideoDevice *video = current_video; | |
| 1431 | |
| 1432 retval = 0; | |
| 1433 switch (attr) { | |
| 1434 case SDL_GL_RED_SIZE: | |
| 1435 video->gl_config.red_size = value; | |
| 1436 break; | |
| 1437 case SDL_GL_GREEN_SIZE: | |
| 1438 video->gl_config.green_size = value; | |
| 1439 break; | |
| 1440 case SDL_GL_BLUE_SIZE: | |
| 1441 video->gl_config.blue_size = value; | |
| 1442 break; | |
| 1443 case SDL_GL_ALPHA_SIZE: | |
| 1444 video->gl_config.alpha_size = value; | |
| 1445 break; | |
| 1446 case SDL_GL_DOUBLEBUFFER: | |
| 1447 video->gl_config.double_buffer = value; | |
| 1448 break; | |
|
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Date: Sun, 27 Jul 2003 22:37:59 +0200
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|
1449 case SDL_GL_BUFFER_SIZE: |
|
66c02f83f5bf
Date: Sun, 27 Jul 2003 22:37:59 +0200
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|
1450 video->gl_config.buffer_size = value; |
| 0 | 1451 break; |
| 1452 case SDL_GL_DEPTH_SIZE: | |
| 1453 video->gl_config.depth_size = value; | |
| 1454 break; | |
| 1455 case SDL_GL_STENCIL_SIZE: | |
| 1456 video->gl_config.stencil_size = value; | |
| 1457 break; | |
|
450
8a43e0cbf02f
Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
1458 case SDL_GL_ACCUM_RED_SIZE: |
| 0 | 1459 video->gl_config.accum_red_size = value; |
| 1460 break; | |
|
450
8a43e0cbf02f
Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
1461 case SDL_GL_ACCUM_GREEN_SIZE: |
| 0 | 1462 video->gl_config.accum_green_size = value; |
| 1463 break; | |
|
450
8a43e0cbf02f
Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
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433
diff
changeset
|
1464 case SDL_GL_ACCUM_BLUE_SIZE: |
| 0 | 1465 video->gl_config.accum_blue_size = value; |
| 1466 break; | |
|
450
8a43e0cbf02f
Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
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433
diff
changeset
|
1467 case SDL_GL_ACCUM_ALPHA_SIZE: |
| 0 | 1468 video->gl_config.accum_alpha_size = value; |
| 1469 break; | |
|
450
8a43e0cbf02f
Added SDL_GL_STEREO for stereoscopic OpenGL contexts
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433
diff
changeset
|
1470 case SDL_GL_STEREO: |
|
8a43e0cbf02f
Added SDL_GL_STEREO for stereoscopic OpenGL contexts
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diff
changeset
|
1471 video->gl_config.stereo = value; |
|
8a43e0cbf02f
Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
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changeset
|
1472 break; |
|
656
864e2d2a9a55
Merged in Ryan's multisample code for MacOS, and changed the constants to match.
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changeset
|
1473 case SDL_GL_MULTISAMPLEBUFFERS: |
|
864e2d2a9a55
Merged in Ryan's multisample code for MacOS, and changed the constants to match.
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
1474 video->gl_config.multisamplebuffers = value; |
|
655
9c42ee1b7d77
Date: Thu, 24 Apr 2003 15:13:47 -0400
Sam Lantinga <slouken@libsdl.org>
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650
diff
changeset
|
1475 break; |
|
656
864e2d2a9a55
Merged in Ryan's multisample code for MacOS, and changed the constants to match.
Sam Lantinga <slouken@libsdl.org>
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655
diff
changeset
|
1476 case SDL_GL_MULTISAMPLESAMPLES: |
|
864e2d2a9a55
Merged in Ryan's multisample code for MacOS, and changed the constants to match.
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
1477 video->gl_config.multisamplesamples = value; |
|
655
9c42ee1b7d77
Date: Thu, 24 Apr 2003 15:13:47 -0400
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parents:
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diff
changeset
|
1478 break; |
| 1737 | 1479 case SDL_GL_ACCELERATED_VISUAL: |
| 1480 video->gl_config.accelerated = value; | |
| 1481 break; | |
|
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1482 case SDL_GL_SWAP_CONTROL: |
|
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|
1483 video->gl_config.swap_control = value; |
|
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1484 break; |
| 0 | 1485 default: |
| 1486 SDL_SetError("Unknown OpenGL attribute"); | |
| 1487 retval = -1; | |
| 1488 break; | |
| 1489 } | |
| 1490 return(retval); | |
| 1491 } | |
| 1492 | |
| 1493 /* Retrieve an attribute value from the windowing system. */ | |
| 1494 int SDL_GL_GetAttribute(SDL_GLattr attr, int* value) | |
| 1495 { | |
| 1496 int retval = -1; | |
| 1497 SDL_VideoDevice* video = current_video; | |
| 1498 SDL_VideoDevice* this = current_video; | |
| 1499 | |
| 1500 if ( video->GL_GetAttribute ) { | |
| 1501 retval = this->GL_GetAttribute(this, attr, value); | |
|
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1502 } else { |
|
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|
1503 *value = 0; |
|
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|
1504 SDL_SetError("GL_GetAttribute not supported"); |
| 0 | 1505 } |
| 1506 return retval; | |
| 1507 } | |
| 1508 | |
| 1509 /* Perform a GL buffer swap on the current GL context */ | |
| 1510 void SDL_GL_SwapBuffers(void) | |
| 1511 { | |
| 1512 SDL_VideoDevice *video = current_video; | |
| 1513 SDL_VideoDevice *this = current_video; | |
| 1514 | |
| 1515 if ( video->screen->flags & SDL_OPENGL ) { | |
|
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|
1516 video->GL_SwapBuffers(this); |
|
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1517 } else { |
|
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1518 SDL_SetError("OpenGL video mode has not been set"); |
| 0 | 1519 } |
| 1520 } | |
| 1521 | |
| 1522 /* Update rects with locking */ | |
| 1523 void SDL_GL_UpdateRectsLock(SDL_VideoDevice* this, int numrects, SDL_Rect *rects) | |
| 1524 { | |
| 1525 SDL_GL_Lock(); | |
| 1526 SDL_GL_UpdateRects(numrects, rects); | |
| 1527 SDL_GL_Unlock(); | |
| 1528 } | |
| 1529 | |
| 1530 /* Update rects without state setting and changing (the caller is responsible for it) */ | |
| 1531 void SDL_GL_UpdateRects(int numrects, SDL_Rect *rects) | |
| 1532 { | |
|
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|
1533 #if SDL_VIDEO_OPENGL |
| 0 | 1534 SDL_VideoDevice *this = current_video; |
| 1535 SDL_Rect update, tmp; | |
| 1536 int x, y, i; | |
| 1537 | |
| 1538 for ( i = 0; i < numrects; i++ ) | |
| 1539 { | |
| 1540 tmp.y = rects[i].y; | |
| 1541 tmp.h = rects[i].h; | |
| 1542 for ( y = 0; y <= rects[i].h / 256; y++ ) | |
| 1543 { | |
| 1544 tmp.x = rects[i].x; | |
| 1545 tmp.w = rects[i].w; | |
| 1546 for ( x = 0; x <= rects[i].w / 256; x++ ) | |
| 1547 { | |
| 1548 update.x = tmp.x; | |
| 1549 update.y = tmp.y; | |
| 1550 update.w = tmp.w; | |
| 1551 update.h = tmp.h; | |
| 1552 | |
| 1553 if ( update.w > 256 ) | |
| 1554 update.w = 256; | |
| 1555 | |
| 1556 if ( update.h > 256 ) | |
| 1557 update.h = 256; | |
| 1558 | |
| 1559 this->glFlush(); | |
| 1560 this->glTexSubImage2D( | |
| 1561 GL_TEXTURE_2D, | |
| 1562 0, | |
| 1563 0, | |
| 1564 0, | |
| 1565 update.w, | |
| 1566 update.h, | |
| 1567 this->is_32bit? GL_RGBA : GL_RGB, | |
| 1568 #ifdef GL_VERSION_1_2 | |
| 1569 this->is_32bit ? GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT_5_6_5, | |
| 1570 #else | |
| 1571 GL_UNSIGNED_BYTE, | |
| 1572 #endif | |
| 1573 (Uint8 *)this->screen->pixels + | |
| 1574 this->screen->format->BytesPerPixel * update.x + | |
| 1575 update.y * this->screen->pitch ); | |
| 1576 | |
| 1577 this->glFlush(); | |
| 1578 /* | |
| 1579 * Note the parens around the function name: | |
| 1580 * This is because some OpenGL implementations define glTexCoord etc | |
| 1581 * as macros, and we don't want them expanded here. | |
| 1582 */ | |
| 1583 this->glBegin(GL_TRIANGLE_STRIP); | |
| 1584 (this->glTexCoord2f)( 0.0, 0.0 ); | |
| 1585 (this->glVertex2i)( update.x, update.y ); | |
| 1586 (this->glTexCoord2f)( (float)(update.w / 256.0), 0.0 ); | |
| 1587 (this->glVertex2i)( update.x + update.w, update.y ); | |
| 1588 (this->glTexCoord2f)( 0.0, (float)(update.h / 256.0) ); | |
| 1589 (this->glVertex2i)( update.x, update.y + update.h ); | |
| 1590 (this->glTexCoord2f)( (float)(update.w / 256.0), (float)(update.h / 256.0) ); | |
| 1591 (this->glVertex2i)( update.x + update.w , update.y + update.h ); | |
| 1592 this->glEnd(); | |
| 1593 | |
| 1594 tmp.x += 256; | |
| 1595 tmp.w -= 256; | |
| 1596 } | |
| 1597 tmp.y += 256; | |
| 1598 tmp.h -= 256; | |
| 1599 } | |
| 1600 } | |
| 1601 #endif | |
| 1602 } | |
| 1603 | |
| 1604 /* Lock == save current state */ | |
| 1605 void SDL_GL_Lock() | |
| 1606 { | |
|
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|
1607 #if SDL_VIDEO_OPENGL |
| 0 | 1608 lock_count--; |
| 1609 if (lock_count==-1) | |
| 1610 { | |
| 1611 SDL_VideoDevice *this = current_video; | |
| 1612 | |
| 1613 this->glPushAttrib( GL_ALL_ATTRIB_BITS ); /* TODO: narrow range of what is saved */ | |
|
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|
1614 #ifdef GL_CLIENT_PIXEL_STORE_BIT |
| 0 | 1615 this->glPushClientAttrib( GL_CLIENT_PIXEL_STORE_BIT ); |
|
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|
1616 #endif |
| 0 | 1617 |
| 1618 this->glEnable(GL_TEXTURE_2D); | |
| 1619 this->glEnable(GL_BLEND); | |
| 1620 this->glDisable(GL_FOG); | |
| 1621 this->glDisable(GL_ALPHA_TEST); | |
| 1622 this->glDisable(GL_DEPTH_TEST); | |
| 1623 this->glDisable(GL_SCISSOR_TEST); | |
| 1624 this->glDisable(GL_STENCIL_TEST); | |
| 1625 this->glDisable(GL_CULL_FACE); | |
| 1626 | |
| 1627 this->glBindTexture( GL_TEXTURE_2D, this->texture ); | |
| 1628 this->glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ); | |
| 1629 this->glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST ); | |
| 1630 this->glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST ); | |
| 1631 this->glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT ); | |
| 1632 this->glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT ); | |
| 1633 | |
| 1634 this->glPixelStorei( GL_UNPACK_ROW_LENGTH, this->screen->pitch / this->screen->format->BytesPerPixel ); | |
| 1635 this->glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); | |
| 1636 (this->glColor4f)(1.0, 1.0, 1.0, 1.0); /* Solaris workaround */ | |
| 1637 | |
| 1638 this->glViewport(0, 0, this->screen->w, this->screen->h); | |
| 1639 this->glMatrixMode(GL_PROJECTION); | |
| 1640 this->glPushMatrix(); | |
| 1641 this->glLoadIdentity(); | |
| 1642 | |
| 1643 this->glOrtho(0.0, (GLdouble) this->screen->w, (GLdouble) this->screen->h, 0.0, 0.0, 1.0); | |
| 1644 | |
| 1645 this->glMatrixMode(GL_MODELVIEW); | |
| 1646 this->glPushMatrix(); | |
| 1647 this->glLoadIdentity(); | |
| 1648 } | |
| 1649 #endif | |
| 1650 } | |
| 1651 | |
| 1652 /* Unlock == restore saved state */ | |
| 1653 void SDL_GL_Unlock() | |
| 1654 { | |
|
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1655 #if SDL_VIDEO_OPENGL |
| 0 | 1656 lock_count++; |
| 1657 if (lock_count==0) | |
| 1658 { | |
| 1659 SDL_VideoDevice *this = current_video; | |
| 1660 | |
| 1661 this->glPopMatrix(); | |
| 1662 this->glMatrixMode(GL_PROJECTION); | |
| 1663 this->glPopMatrix(); | |
| 1664 | |
| 1665 this->glPopClientAttrib(); | |
| 1666 this->glPopAttrib(); | |
| 1667 } | |
| 1668 #endif | |
| 1669 } | |
| 1670 | |
| 1671 /* | |
| 1672 * Sets/Gets the title and icon text of the display window, if any. | |
| 1673 */ | |
| 1674 void SDL_WM_SetCaption (const char *title, const char *icon) | |
| 1675 { | |
| 1676 SDL_VideoDevice *video = current_video; | |
| 1677 SDL_VideoDevice *this = current_video; | |
| 1678 | |
|
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|
1679 if ( video ) { |
|
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|
1680 if ( title ) { |
|
bd6b0a910a65
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|
1681 if ( video->wm_title ) { |
|
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|
1682 SDL_free(video->wm_title); |
|
58
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|
1683 } |
|
1379
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|
1684 video->wm_title = SDL_strdup(title); |
| 0 | 1685 } |
|
58
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|
1686 if ( icon ) { |
|
bd6b0a910a65
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diff
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|
1687 if ( video->wm_icon ) { |
|
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|
1688 SDL_free(video->wm_icon); |
|
58
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|
1689 } |
|
1379
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Sam Lantinga <slouken@libsdl.org>
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1361
diff
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|
1690 video->wm_icon = SDL_strdup(icon); |
| 0 | 1691 } |
|
58
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|
1692 if ( (title || icon) && (video->SetCaption != NULL) ) { |
|
bd6b0a910a65
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diff
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|
1693 video->SetCaption(this, video->wm_title,video->wm_icon); |
| 0 | 1694 } |
| 1695 } | |
| 1696 } | |
| 1697 void SDL_WM_GetCaption (char **title, char **icon) | |
| 1698 { | |
|
58
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Sam Lantinga <slouken@lokigames.com>
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|
1699 SDL_VideoDevice *video = current_video; |
|
bd6b0a910a65
* Removed fullscreen menu option from the "Window" menu
Sam Lantinga <slouken@lokigames.com>
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diff
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|
1700 |
|
bd6b0a910a65
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diff
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|
1701 if ( video ) { |
|
bd6b0a910a65
* Removed fullscreen menu option from the "Window" menu
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diff
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|
1702 if ( title ) { |
|
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diff
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|
1703 *title = video->wm_title; |
|
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* Removed fullscreen menu option from the "Window" menu
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diff
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|
1704 } |
|
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diff
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|
1705 if ( icon ) { |
|
bd6b0a910a65
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diff
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|
1706 *icon = video->wm_icon; |
|
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|
1707 } |
| 0 | 1708 } |
| 1709 } | |
| 1710 | |
|
541
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Support 1-bit alpha on surfaces passed to SDL_WM_SetIcon() (thanks Glenn!)
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|
1711 /* Utility function used by SDL_WM_SetIcon(); |
|
796f2fe699be
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|
1712 * flags & 1 for color key, flags & 2 for alpha channel. */ |
|
796f2fe699be
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|
1713 static void CreateMaskFromColorKeyOrAlpha(SDL_Surface *icon, Uint8 *mask, int flags) |
| 0 | 1714 { |
| 1715 int x, y; | |
| 1716 Uint32 colorkey; | |
| 1717 #define SET_MASKBIT(icon, x, y, mask) \ | |
| 1718 mask[(y*((icon->w+7)/8))+(x/8)] &= ~(0x01<<(7-(x%8))) | |
| 1719 | |
| 1720 colorkey = icon->format->colorkey; | |
| 1721 switch (icon->format->BytesPerPixel) { | |
| 1722 case 1: { Uint8 *pixels; | |
| 1723 for ( y=0; y<icon->h; ++y ) { | |
| 1724 pixels = (Uint8 *)icon->pixels + y*icon->pitch; | |
| 1725 for ( x=0; x<icon->w; ++x ) { | |
| 1726 if ( *pixels++ == colorkey ) { | |
| 1727 SET_MASKBIT(icon, x, y, mask); | |
| 1728 } | |
| 1729 } | |
| 1730 } | |
| 1731 } | |
| 1732 break; | |
| 1733 | |
| 1734 case 2: { Uint16 *pixels; | |
| 1735 for ( y=0; y<icon->h; ++y ) { | |
| 1736 pixels = (Uint16 *)icon->pixels + | |
| 1737 y*icon->pitch/2; | |
| 1738 for ( x=0; x<icon->w; ++x ) { | |
|
541
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|
1739 if ( (flags & 1) && *pixels == colorkey ) { |
|
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|
1740 SET_MASKBIT(icon, x, y, mask); |
|
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|
1741 } else if((flags & 2) && (*pixels & icon->format->Amask) == 0) { |
| 0 | 1742 SET_MASKBIT(icon, x, y, mask); |
| 1743 } | |
|
541
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|
1744 pixels++; |
| 0 | 1745 } |
| 1746 } | |
| 1747 } | |
| 1748 break; | |
| 1749 | |
| 1750 case 4: { Uint32 *pixels; | |
| 1751 for ( y=0; y<icon->h; ++y ) { | |
| 1752 pixels = (Uint32 *)icon->pixels + | |
| 1753 y*icon->pitch/4; | |
| 1754 for ( x=0; x<icon->w; ++x ) { | |
|
541
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|
1755 if ( (flags & 1) && *pixels == colorkey ) { |
|
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|
1756 SET_MASKBIT(icon, x, y, mask); |
|
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|
1757 } else if((flags & 2) && (*pixels & icon->format->Amask) == 0) { |
| 0 | 1758 SET_MASKBIT(icon, x, y, mask); |
| 1759 } | |
|
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|
1760 pixels++; |
| 0 | 1761 } |
| 1762 } | |
| 1763 } | |
| 1764 break; | |
| 1765 } | |
| 1766 } | |
| 1767 | |
| 1768 /* | |
| 1769 * Sets the window manager icon for the display window. | |
| 1770 */ | |
| 1771 void SDL_WM_SetIcon (SDL_Surface *icon, Uint8 *mask) | |
| 1772 { | |
| 1773 SDL_VideoDevice *video = current_video; | |
| 1774 SDL_VideoDevice *this = current_video; | |
| 1775 | |
| 1776 if ( icon && video->SetIcon ) { | |
| 1777 /* Generate a mask if necessary, and create the icon! */ | |
| 1778 if ( mask == NULL ) { | |
| 1779 int mask_len = icon->h*(icon->w+7)/8; | |
|
541
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|
1780 int flags = 0; |
|
1336
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|
1781 mask = (Uint8 *)SDL_malloc(mask_len); |
| 0 | 1782 if ( mask == NULL ) { |
| 1783 return; | |
| 1784 } | |
|
1336
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|
1785 SDL_memset(mask, ~0, mask_len); |
|
541
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|
1786 if ( icon->flags & SDL_SRCCOLORKEY ) flags |= 1; |
|
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|
1787 if ( icon->flags & SDL_SRCALPHA ) flags |= 2; |
|
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|
1788 if( flags ) { |
|
796f2fe699be
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|
1789 CreateMaskFromColorKeyOrAlpha(icon, mask, flags); |
| 0 | 1790 } |
| 1791 video->SetIcon(video, icon, mask); | |
|
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1792 SDL_free(mask); |
| 0 | 1793 } else { |
| 1794 video->SetIcon(this, icon, mask); | |
| 1795 } | |
| 1796 } | |
| 1797 } | |
| 1798 | |
| 1799 /* | |
| 1800 * Grab or ungrab the keyboard and mouse input. | |
| 1801 * This function returns the final grab mode after calling the | |
| 1802 * driver dependent function. | |
| 1803 */ | |
| 1804 static SDL_GrabMode SDL_WM_GrabInputRaw(SDL_GrabMode mode) | |
| 1805 { | |
| 1806 SDL_VideoDevice *video = current_video; | |
| 1807 SDL_VideoDevice *this = current_video; | |
| 1808 | |
| 1809 /* Only do something if we have support for grabs */ | |
| 1810 if ( video->GrabInput == NULL ) { | |
| 1811 return(video->input_grab); | |
| 1812 } | |
| 1813 | |
| 1814 /* If the final grab mode if off, only then do we actually grab */ | |
| 1815 #ifdef DEBUG_GRAB | |
| 1816 printf("SDL_WM_GrabInputRaw(%d) ... ", mode); | |
| 1817 #endif | |
| 1818 if ( mode == SDL_GRAB_OFF ) { | |
| 1819 if ( video->input_grab != SDL_GRAB_OFF ) { | |
| 1820 mode = video->GrabInput(this, mode); | |
| 1821 } | |
| 1822 } else { | |
| 1823 if ( video->input_grab == SDL_GRAB_OFF ) { | |
| 1824 mode = video->GrabInput(this, mode); | |
| 1825 } | |
| 1826 } | |
| 1827 if ( mode != video->input_grab ) { | |
| 1828 video->input_grab = mode; | |
| 1829 if ( video->CheckMouseMode ) { | |
| 1830 video->CheckMouseMode(this); | |
| 1831 } | |
| 1832 } | |
| 1833 #ifdef DEBUG_GRAB | |
| 1834 printf("Final mode %d\n", video->input_grab); | |
| 1835 #endif | |
| 1836 | |
| 1837 /* Return the final grab state */ | |
| 1838 if ( mode >= SDL_GRAB_FULLSCREEN ) { | |
| 1839 mode -= SDL_GRAB_FULLSCREEN; | |
| 1840 } | |
| 1841 return(mode); | |
| 1842 } | |
| 1843 SDL_GrabMode SDL_WM_GrabInput(SDL_GrabMode mode) | |
| 1844 { | |
| 1845 SDL_VideoDevice *video = current_video; | |
| 1846 | |
|
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1847 /* If the video isn't initialized yet, we can't do anything */ |
|
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1848 if ( ! video ) { |
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1849 return SDL_GRAB_OFF; |
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1850 } |
| 0 | 1851 |
| 1852 /* Return the current mode on query */ | |
| 1853 if ( mode == SDL_GRAB_QUERY ) { | |
| 1854 mode = video->input_grab; | |
| 1855 if ( mode >= SDL_GRAB_FULLSCREEN ) { | |
| 1856 mode -= SDL_GRAB_FULLSCREEN; | |
| 1857 } | |
| 1858 return(mode); | |
| 1859 } | |
| 1860 | |
| 1861 #ifdef DEBUG_GRAB | |
| 1862 printf("SDL_WM_GrabInput(%d) ... ", mode); | |
| 1863 #endif | |
| 1864 /* If the video surface is fullscreen, we always grab */ | |
| 1865 if ( mode >= SDL_GRAB_FULLSCREEN ) { | |
| 1866 mode -= SDL_GRAB_FULLSCREEN; | |
| 1867 } | |
| 1868 if ( SDL_VideoSurface && (SDL_VideoSurface->flags & SDL_FULLSCREEN) ) { | |
| 1869 mode += SDL_GRAB_FULLSCREEN; | |
| 1870 } | |
| 1871 return(SDL_WM_GrabInputRaw(mode)); | |
| 1872 } | |
| 1873 static SDL_GrabMode SDL_WM_GrabInputOff(void) | |
| 1874 { | |
| 1875 SDL_GrabMode mode; | |
| 1876 | |
| 1877 /* First query the current grab state */ | |
| 1878 mode = SDL_WM_GrabInput(SDL_GRAB_QUERY); | |
| 1879 | |
| 1880 /* Now explicitly turn off input grab */ | |
| 1881 SDL_WM_GrabInputRaw(SDL_GRAB_OFF); | |
| 1882 | |
| 1883 /* Return the old state */ | |
| 1884 return(mode); | |
| 1885 } | |
| 1886 | |
| 1887 /* | |
| 1888 * Iconify the window in window managed environments. | |
| 1889 * A successful iconification will result in an SDL_APPACTIVE loss event. | |
| 1890 */ | |
| 1891 int SDL_WM_IconifyWindow(void) | |
| 1892 { | |
| 1893 SDL_VideoDevice *video = current_video; | |
| 1894 SDL_VideoDevice *this = current_video; | |
| 1895 int retval; | |
| 1896 | |
| 1897 retval = 0; | |
| 1898 if ( video->IconifyWindow ) { | |
| 1899 retval = video->IconifyWindow(this); | |
| 1900 } | |
| 1901 return(retval); | |
| 1902 } | |
| 1903 | |
| 1904 /* | |
| 1905 * Toggle fullscreen mode | |
| 1906 */ | |
| 1907 int SDL_WM_ToggleFullScreen(SDL_Surface *surface) | |
| 1908 { | |
| 1909 SDL_VideoDevice *video = current_video; | |
| 1910 SDL_VideoDevice *this = current_video; | |
| 1911 int toggled; | |
| 1912 | |
| 1913 toggled = 0; | |
| 1914 if ( SDL_PublicSurface && (surface == SDL_PublicSurface) && | |
| 1915 video->ToggleFullScreen ) { | |
| 1916 if ( surface->flags & SDL_FULLSCREEN ) { | |
| 1917 toggled = video->ToggleFullScreen(this, 0); | |
| 1918 if ( toggled ) { | |
| 1919 SDL_VideoSurface->flags &= ~SDL_FULLSCREEN; | |
| 1920 SDL_PublicSurface->flags &= ~SDL_FULLSCREEN; | |
| 1921 } | |
| 1922 } else { | |
| 1923 toggled = video->ToggleFullScreen(this, 1); | |
| 1924 if ( toggled ) { | |
| 1925 SDL_VideoSurface->flags |= SDL_FULLSCREEN; | |
| 1926 SDL_PublicSurface->flags |= SDL_FULLSCREEN; | |
| 1927 } | |
| 1928 } | |
| 1929 /* Double-check the grab state inside SDL_WM_GrabInput() */ | |
| 1930 if ( toggled ) { | |
| 1931 SDL_WM_GrabInput(video->input_grab); | |
| 1932 } | |
| 1933 } | |
| 1934 return(toggled); | |
| 1935 } | |
| 1936 | |
| 1937 /* | |
| 1938 * Get some platform dependent window manager information | |
| 1939 */ | |
| 1940 int SDL_GetWMInfo (SDL_SysWMinfo *info) | |
| 1941 { | |
| 1942 SDL_VideoDevice *video = current_video; | |
| 1943 SDL_VideoDevice *this = current_video; | |
| 1944 | |
| 1945 if ( video && video->GetWMInfo ) { | |
| 1946 return(video->GetWMInfo(this, info)); | |
| 1947 } else { | |
| 1948 return(0); | |
| 1949 } | |
| 1950 } |