Shamusworld >> Repos - virtualjaguar/blob - src/video.cpp

   1 //
   2 // VIDEO.CPP: SDL/local hardware specific video routines
   3 //
   4 // by James L. Hammons
   5 //
   6
   7 #include "video.h"
   8
   9 #include "gui.h"                                                                // For "finished"
  10 #include "log.h"
  11 #include "tom.h"
  12 #include "sdlemu_opengl.h"
  13 #include "settings.h"
  14
  15 // External global variables
  16
  17 //shouldn't these exist here??? Prolly.
  18 //And now, they do! :-)
  19 SDL_Surface * surface, * mainSurface;
  20 SDL_Joystick * joystick;
  21 Uint32 mainSurfaceFlags;
  22 //int16 * backbuffer;
  23 uint32 * backbuffer;
  24
  25 // One of the reasons why OpenGL is slower then normal SDL rendering, is because
  26 // the data is being pumped into the buffer every frame with a overflow as result.
  27 // So, we going tot render every 1 frame instead of every 0 frame.
  28
  29 // [Shamus] This isn't the case. OpenGL is slower because 60 frames a second is a
  30 //          lot of data to pump through the system. In any case, frameskip is probably
  31 //          a good idea for now, since most systems are probably too slow to run at
  32 //          60 FPS. But doing so will have some nasty side effects in some games.
  33 //          You have been warned!
  34
  35 int frame_ticker = 0;
  36
  37 //
  38 // Create SDL/OpenGL surfaces
  39 //
  40 bool VideoInit(void)
  41 {
  42         // Get proper info about the platform we're running on...
  43         const SDL_VideoInfo * info = SDL_GetVideoInfo();
  44
  45         if (!info)
  46         {
  47                 WriteLog("VJ: SDL is unable to get the video info: %s\n", SDL_GetError());
  48                 return false;
  49         }
  50
  51         if (vjs.useOpenGL)
  52         {
  53                 // Initializing SDL attributes with OpenGL
  54                 SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
  55                 SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
  56                 mainSurfaceFlags = SDL_OPENGL;
  57         }
  58         else
  59         {
  60                 if (info->hw_available)
  61                         mainSurfaceFlags = SDL_HWSURFACE | SDL_HWPALETTE | SDL_DOUBLEBUF;
  62
  63                 if (info->blit_hw)
  64                         mainSurfaceFlags |= SDL_HWACCEL;
  65         }
  66
  67         if (vjs.fullscreen)
  68                 mainSurfaceFlags |= SDL_FULLSCREEN;
  69
  70 /*      if (!vjs.useOpenGL)
  71 //              mainSurface = SDL_SetVideoMode(VIRTUAL_SCREEN_WIDTH, VIRTUAL_SCREEN_HEIGHT_NTSC, 16, mainSurfaceFlags);
  72                 mainSurface = SDL_SetVideoMode(VIRTUAL_SCREEN_WIDTH,
  73                         (vjs.hardwareTypeNTSC ? VIRTUAL_SCREEN_HEIGHT_NTSC : VIRTUAL_SCREEN_HEIGHT_PAL),
  74                         16, mainSurfaceFlags);
  75         else
  76                 // When OpenGL is used, we're going to use a standard resolution of 640x480.
  77                 // This way we have good scaling functionality and when the screen is resized
  78                 // because of the NTSC <-> PAL resize, we only have to re-create the texture
  79                 // instead of initializing the entire OpenGL texture en screens.
  80                 mainSurface = SDL_SetVideoMode(640, 480, 16, mainSurfaceFlags);//*/
  81 //24BPP
  82         if (!vjs.useOpenGL)
  83 //              mainSurface = SDL_SetVideoMode(VIRTUAL_SCREEN_WIDTH, VIRTUAL_SCREEN_HEIGHT_NTSC, 16, mainSurfaceFlags);
  84                 mainSurface = SDL_SetVideoMode(VIRTUAL_SCREEN_WIDTH,
  85                         (vjs.hardwareTypeNTSC ? VIRTUAL_SCREEN_HEIGHT_NTSC : VIRTUAL_SCREEN_HEIGHT_PAL),
  86                         32, mainSurfaceFlags);
  87         else
  88                 // When OpenGL is used, we're going to use a standard resolution of 640x480.
  89                 // This way we have good scaling functionality and when the screen is resized
  90                 // because of the NTSC <-> PAL resize, we only have to re-create the texture
  91                 // instead of initializing the entire OpenGL texture en screens.
  92                 mainSurface = SDL_SetVideoMode(640, 480, 32, mainSurfaceFlags);//*/
  93
  94         if (mainSurface == NULL)
  95         {
  96                 WriteLog("VJ: SDL is unable to set the video mode: %s\n", SDL_GetError());
  97                 return false;
  98         }
  99
 100         SDL_WM_SetCaption("Virtual Jaguar", "Virtual Jaguar");
 101
 102         // Create the primary SDL display (16 BPP, 5/5/5 RGB format)
 103 /*      surface = SDL_CreateRGBSurface(SDL_SWSURFACE, VIRTUAL_SCREEN_WIDTH,
 104                 (vjs.hardwareTypeNTSC ? VIRTUAL_SCREEN_HEIGHT_NTSC : VIRTUAL_SCREEN_HEIGHT_PAL),
 105                 16, 0x7C00, 0x03E0, 0x001F, 0);//*/
 106
 107         uint32 vsWidth = (vjs.renderType == RT_TV ? 1280 : VIRTUAL_SCREEN_WIDTH),
 108                 vsHeight = (vjs.hardwareTypeNTSC ? VIRTUAL_SCREEN_HEIGHT_NTSC : VIRTUAL_SCREEN_HEIGHT_PAL);
 109
 110 //      if (vjs.renderType == RT_TV)
 111 //              vsWidth = 1280;
 112 //24BPP
 113 //      surface = SDL_CreateRGBSurface(SDL_SWSURFACE, VIRTUAL_SCREEN_WIDTH,
 114         surface = SDL_CreateRGBSurface(SDL_SWSURFACE, vsWidth, vsHeight, 32,
 115 #if SDL_BYTEORDER == SDL_BIG_ENDIAN
 116                  0xFF000000, 0x00FF0000, 0x0000FF00, 0x000000FF);
 117 #else
 118                  0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000);
 119 #endif//*/
 120
 121         if (surface == NULL)
 122         {
 123                 WriteLog("VJ: Could not create primary SDL surface: %s\n", SDL_GetError());
 124                 return false;
 125         }
 126
 127         if (vjs.useOpenGL)
 128                 // Let us setup OpenGL and our rendering texture. We give the src (surface) and the
 129                 // dst (mainSurface) display as well as the automatic bpp selection as options so that
 130                 // our texture is automatically created :)
 131                 sdlemu_init_opengl(surface, mainSurface, 1 /*method*/,
 132                         vjs.glFilter /*texture type (linear, nearest)*/,
 133                         0 /* Automatic bpp selection based upon src */);
 134
 135         // Initialize Joystick support under SDL
 136
 137         if (vjs.useJoystick)
 138         {
 139                 if (SDL_NumJoysticks() <= 0)
 140                 {
 141                         vjs.useJoystick = false;
 142                         printf("VJ: No joystick(s) or joypad(s) detected on your system. Using keyboard...\n");
 143                 }
 144                 else
 145                 {
 146                         if ((joystick = SDL_JoystickOpen(vjs.joyport)) == 0)
 147                         {
 148                                 vjs.useJoystick = false;
 149                                 printf("VJ: Unable to open a Joystick on port: %d\n", (int)vjs.joyport);
 150                         }
 151                         else
 152                                 printf("VJ: Using: %s\n", SDL_JoystickName(vjs.joyport));
 153                 }
 154         }
 155
 156         // Set up the backbuffer
 157         // To be safe, this should be 1280 * 625 * 2...
 158         backbuffer = (uint32 *)malloc(1280 * 625 * sizeof(uint32));
 159         memset(backbuffer, 0x44, VIRTUAL_SCREEN_WIDTH *
 160                 (vjs.hardwareTypeNTSC ? VIRTUAL_SCREEN_HEIGHT_NTSC : VIRTUAL_SCREEN_HEIGHT_PAL)
 161                 * sizeof(uint32));
 162
 163         return true;
 164 }
 165
 166 //
 167 // Free various SDL components
 168 //
 169 void VideoDone(void)
 170 {
 171         if (vjs.useOpenGL)
 172                 sdlemu_close_opengl();
 173
 174         SDL_JoystickClose(joystick);
 175         SDL_FreeSurface(surface);
 176         free(backbuffer);
 177 }
 178
 179 //
 180 // Render the backbuffer to the primary screen surface
 181 //
 182 void RenderBackbuffer(void)
 183 {
 184         // Handle frameskip *before* we do any heavy lifting here...
 185
 186         if (frame_ticker > 0)
 187         {
 188                 frame_ticker--;
 189                 return;
 190         }
 191
 192         frame_ticker = vjs.frameSkip;                           // Reset frame_ticker
 193
 194         if (SDL_MUSTLOCK(surface))
 195                 while (SDL_LockSurface(surface) < 0)
 196                         SDL_Delay(10);
 197
 198 //      memcpy(surface->pixels, backbuffer, tom_getVideoModeWidth() * tom_getVideoModeHeight() * 2);
 199 // This memcpy is expensive--do some profiling to see what the impact is!
 200         if (vjs.renderType == RT_NORMAL)
 201                 memcpy(surface->pixels, backbuffer, TOMGetVideoModeWidth() * TOMGetVideoModeHeight() * 4);
 202         else if (vjs.renderType == RT_TV)
 203                 memcpy(surface->pixels, backbuffer, 1280 * TOMGetVideoModeHeight() * 4);
 204
 205         if (SDL_MUSTLOCK(surface))
 206                 SDL_UnlockSurface(surface);
 207
 208         if (vjs.useOpenGL)
 209                 // One of the reasons why OpenGL is slower then normal SDL rendering, is because
 210                 // the data is being pumped into the buffer every frame with a overflow as result.
 211                 // So, we going to render every 1 fps instead of every 0 fps.
 212                 // [Shamus] This is isn't why it's slower--see top of file for explanation... ;-)
 213 //The problem lies in this function...
 214                 sdlemu_draw_texture(mainSurface, surface, 1/*1=GL_QUADS*/);
 215         else
 216         {
 217                 SDL_Rect rect = { 0, 0, surface->w, surface->h };
 218                 SDL_BlitSurface(surface, &rect, mainSurface, &rect);
 219                 SDL_Flip(mainSurface);
 220     }
 221 }
 222
 223 //
 224 // Resize the main SDL screen & backbuffer
 225 //
 226 void ResizeScreen(uint32 width, uint32 height)
 227 {
 228         SDL_FreeSurface(surface);
 229         surface = SDL_CreateRGBSurface(SDL_SWSURFACE, width, height, 32,
 230 #if SDL_BYTEORDER == SDL_BIG_ENDIAN
 231                  0xFF000000, 0x00FF0000, 0x0000FF00, 0x000000FF);
 232 #else
 233                  0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000);
 234 #endif//*/
 235
 236         if (surface == NULL)
 237         {
 238                 WriteLog("Video: Could not create primary SDL surface: %s", SDL_GetError());
 239 //This is just crappy. We shouldn't exit this way--it leaves all kinds of memory leaks
 240 //as well as screwing up SDL... !!! FIX !!!
 241 //              exit(1);
 242                 // OK, this is cleaner. We can't continue if there is no surface created!
 243                 finished = true;
 244         }
 245
 246         if (vjs.useOpenGL)
 247         {
 248                 // Recreate the texture because of the NTSC <-> PAL screen resize.
 249 //Not sure why this is here...
 250 //Is it because of the resized surface up above?
 251                 sdlemu_create_texture(surface, mainSurface, vjs.glFilter, 0);
 252         }
 253         else
 254         {
 255                 mainSurface = SDL_SetVideoMode(width, height, 32, mainSurfaceFlags);
 256
 257                 if (mainSurface == NULL)
 258                 {
 259                         WriteLog("Video: SDL is unable to set the video mode: %s\n", SDL_GetError());
 260 // Don't exit because we can't resize!
 261 //                      exit(1);
 262                 }
 263         }
 264
 265         char window_title[64];
 266
 267         sprintf(window_title, "Virtual Jaguar (%i x %i)", (int)width, (int)height);
 268         SDL_WM_SetCaption((vjs.useOpenGL ? "Virtual Jaguar (OpenGL)" : window_title), "Virtual Jaguar");
 269 }
 270
 271 //
 272 // Return the screen's width in pixels
 273 //
 274 uint32 GetSDLScreenWidthInPixels(void)
 275 {
 276         return surface->pitch / 4;                                              // Pitch / 4 since we're in 32BPP mode
 277 }
 278
 279 //
 280 // Fullscreen <-> window switching
 281 //
 282 void ToggleFullscreen(void)
 283 {
 284         // Set our internal variable, then toggle the SDL flag
 285         vjs.fullscreen = !vjs.fullscreen;
 286         mainSurfaceFlags ^= SDL_FULLSCREEN;
 287 //      mainSurfaceFlags = (vjs.fullscreen ? mainSurfaceFlags | SDL_FULLSCREEN :
 288 //              mainSurfaceFlags & ~SDL_FULLSCREEN);
 289
 290 //      mainSurfaceFlags &= ~SDL_FULLSCREEN;
 291
 292 //      if (vjs.fullscreen)
 293 //              mainSurfaceFlags |= SDL_FULLSCREEN;
 294
 295         if (vjs.useOpenGL)
 296         {
 297                 // When OpenGL is used, we're going to use a standard resolution of 640x480.
 298                 // This way we have good scaling functionality and when the screen is resized
 299                 // because of the NTSC <-> PAL resize, we only have to re-create the texture
 300                 // instead of initializing the entire OpenGL texture en screens.
 301                 mainSurface = SDL_SetVideoMode(640, 480, 32, mainSurfaceFlags);
 302
 303                 // Reset viewport, etc.
 304                 glViewport(0, 0, mainSurface->w, mainSurface->h);
 305                 glMatrixMode(GL_PROJECTION);
 306                 glPushMatrix();
 307                 glLoadIdentity();
 308                 glOrtho(0.0, (GLdouble)mainSurface->w, (GLdouble)mainSurface->h, 0.0, 0.0, 1.0);
 309                 glMatrixMode(GL_MODELVIEW);
 310                 glPushMatrix();
 311                 glLoadIdentity();
 312         }
 313         else
 314                 mainSurface = SDL_SetVideoMode(VIRTUAL_SCREEN_WIDTH,
 315                         (vjs.hardwareTypeNTSC ? VIRTUAL_SCREEN_HEIGHT_NTSC : VIRTUAL_SCREEN_HEIGHT_PAL),
 316                         32, mainSurfaceFlags);
 317
 318         if (mainSurface == NULL)
 319         {
 320                 WriteLog("Video: SDL was unable to switch the video to %s: %s\n", (vjs.fullscreen ? "fullscreen" : "windowed"), SDL_GetError());
 321 // Shouldn't exit because we can't switch! BAD!!!
 322 //              exit(1);
 323                 return;
 324         }
 325
 326         SDL_WM_SetCaption((vjs.useOpenGL ? "Virtual Jaguar (OpenGL)" : "Virtual Jaguar"), "Virtual Jaguar");
 327
 328         return;
 329 }