Shamusworld >> Repos - apple2/blob - src/video.cpp

   1 //
   2 // VIDEO.CPP: SDL/local hardware specific video routines
   3 //
   4 // by James L. Hammons
   5 //
   6 // JLH = James L. Hammons <jlhamm@acm.org>
   7 //
   8 // WHO  WHEN        WHAT
   9 // ---  ----------  ------------------------------------------------------------
  10 // JLH  01/04/2006  Added changelog ;-)
  11 // JLH  01/20/2006  Cut out unnecessary buffering
  12 //
  13
  14 #include "video.h"
  15
  16 //#include <SDL.h>
  17 #include <string.h>     // Why??? (for memset, etc... Lazy!) Dunno why, but this just strikes me as wrong...
  18 #include <malloc.h>
  19 #include "sdlemu_opengl.h"
  20 #include "log.h"
  21 #include "settings.h"
  22 #include "icon.h"
  23
  24 #if SDL_BYTEORDER == SDL_BIG_ENDIAN
  25 #define MASK_R 0xFF000000
  26 #define MASK_G 0x00FF0000
  27 #define MASK_B 0x0000FF00
  28 #define MASK_A 0x000000FF
  29 #else
  30 #define MASK_R 0x000000FF
  31 #define MASK_G 0x0000FF00
  32 #define MASK_B 0x00FF0000
  33 #define MASK_A 0xFF000000
  34 #endif
  35
  36 //#define TEST_ALPHA_BLENDING
  37
  38 // Exported global variables (actually, these are LOCAL global variables, EXPORTED...)
  39
  40 SDL_Surface * surface, * mainSurface, * someAlphaSurface;
  41 Uint32 mainSurfaceFlags;
  42 //uint32 scrBuffer[VIRTUAL_SCREEN_WIDTH * VIRTUAL_SCREEN_HEIGHT];
  43 uint32 * scrBuffer = NULL;
  44 SDL_Joystick * joystick;
  45
  46 //
  47 // Prime SDL and create surfaces
  48 //
  49 bool InitVideo(void)
  50 {
  51         // Set up SDL library
  52         if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK | SDL_INIT_AUDIO | SDL_INIT_TIMER | SDL_INIT_NOPARACHUTE) < 0)
  53         {
  54                 WriteLog("Video: Could not initialize the SDL library: %s\n", SDL_GetError());
  55                 return false;
  56         }
  57
  58         //Set icon (mainly for Win32 target--though seems to work under KDE as well...!)
  59         SDL_Surface * iconSurf = SDL_CreateRGBSurfaceFrom(icon, 32, 32, 32, 128,
  60                 MASK_R, MASK_G, MASK_B, MASK_A);
  61         SDL_WM_SetIcon(iconSurf, NULL);
  62         SDL_FreeSurface(iconSurf);
  63
  64         // Get proper info about the platform we're running on...
  65         const SDL_VideoInfo * info = SDL_GetVideoInfo();
  66
  67         if (!info)
  68         {
  69                 WriteLog("Video: SDL is unable to get the video info: %s\n", SDL_GetError());
  70                 return false;
  71         }
  72
  73         if (settings.useOpenGL)
  74         {
  75                 mainSurfaceFlags = SDL_HWSURFACE | SDL_HWPALETTE | SDL_DOUBLEBUF | SDL_OPENGL;
  76                 SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
  77         }
  78         else
  79         {
  80                 mainSurfaceFlags = SDL_DOUBLEBUF;
  81
  82                 if (info->hw_available)
  83                 {
  84                         mainSurfaceFlags = SDL_HWSURFACE | SDL_HWPALETTE;
  85                         WriteLog("Video: Hardware available...\n");
  86                 }
  87
  88                 if (info->blit_hw)
  89                 {
  90                         mainSurfaceFlags |= SDL_HWACCEL;
  91                         WriteLog("Video: Hardware blit available...\n");
  92                 }
  93         }
  94
  95         if (settings.fullscreen)
  96                 mainSurfaceFlags |= SDL_FULLSCREEN;
  97
  98         // Create the primary SDL display (32 BPP)
  99         if (!settings.useOpenGL)
 100                 mainSurface = SDL_SetVideoMode(VIRTUAL_SCREEN_WIDTH, VIRTUAL_SCREEN_HEIGHT, 32, mainSurfaceFlags);
 101         else
 102 //              mainSurface = SDL_SetVideoMode(VIRTUAL_SCREEN_WIDTH * 2, VIRTUAL_SCREEN_HEIGHT * 2, 32, mainSurfaceFlags);
 103 //              mainSurface = SDL_SetVideoMode(VIRTUAL_SCREEN_WIDTH, VIRTUAL_SCREEN_HEIGHT * 2, 32, mainSurfaceFlags);
 104                 mainSurface = SDL_SetVideoMode(VIRTUAL_SCREEN_WIDTH, VIRTUAL_SCREEN_HEIGHT, 32, mainSurfaceFlags);
 105
 106         if (mainSurface == NULL)
 107         {
 108                 WriteLog("Video: SDL is unable to set the video mode: %s\n", SDL_GetError());
 109                 return false;
 110         }
 111
 112         SDL_WM_SetCaption("Apple 2 SDL", "Apple 2 SDL");
 113
 114         // Create the secondary SDL display (32 BPP) that we use directly
 115         surface = SDL_CreateRGBSurface(SDL_SWSURFACE, VIRTUAL_SCREEN_WIDTH, VIRTUAL_SCREEN_HEIGHT, 32,
 116                 MASK_R, MASK_G, MASK_B, MASK_A);
 117 /*WriteLog("Video: Created secondary surface with attributes:\n\n");
 118 WriteLog("\tWidth, height: %u x %u\n", surface->w, surface->h);
 119 WriteLog("\t        Pitch: %u\n", surface->pitch);
 120 WriteLog("\t      Palette: %08X\n", surface->format->palette);
 121 WriteLog("\t          BPP: %u\n", surface->format->BitsPerPixel);
 122 WriteLog("\t      BytesPP: %u\n", surface->format->BytesPerPixel);
 123 WriteLog("\t        RMask: %08X\n", surface->format->Rmask);
 124 WriteLog("\t        GMask: %08X\n", surface->format->Gmask);
 125 WriteLog("\t        BMask: %08X\n", surface->format->Bmask);
 126 WriteLog("\t        AMask: %08X\n", surface->format->Amask);
 127 WriteLog("\n");//*/
 128
 129         if (surface == NULL)
 130         {
 131                 WriteLog("Video: Could not create secondary SDL surface: %s\n", SDL_GetError());
 132                 return false;
 133         }
 134
 135         if (settings.useOpenGL)
 136                 sdlemu_init_opengl(surface, mainSurface, 1 /*method*/, settings.glFilter /*texture type (linear, nearest)*/,
 137                 0 /* Automatic bpp selection based upon src */);
 138
 139         // Initialize Joystick support under SDL
 140 /*      if (settings.useJoystick)
 141         {
 142                 if (SDL_NumJoysticks() <= 0)
 143                 {
 144                         settings.useJoystick = false;
 145                         WriteLog("Video: No joystick(s) or joypad(s) detected on your system. Using keyboard...\n");
 146                 }
 147                 else
 148                 {
 149                         if ((joystick = SDL_JoystickOpen(settings.joyport)) == 0)
 150                         {
 151                                 settings.useJoystick = false;
 152                                 WriteLog("Video: Unable to open a Joystick on port: %d\n", (int)settings.joyport);
 153                         }
 154                         else
 155                                 WriteLog("Video: Using: %s\n", SDL_JoystickName(settings.joyport));
 156                 }
 157         }//*/
 158
 159         // Set up the scrBuffer
 160         scrBuffer = (uint32 *)surface->pixels;  // Kludge--And shouldn't have to lock since it's a software surface...
 161 //needed? Dunno. Mebbe an SDL function instead?
 162 //      memset(scrBuffer, 0x00, VIRTUAL_SCREEN_WIDTH * VIRTUAL_SCREEN_HEIGHT * sizeof(uint32));
 163
 164 #ifdef TEST_ALPHA_BLENDING
 165 //Here's some code to test alpha blending...
 166 //Well whaddya know, it works. :-)
 167         someAlphaSurface = SDL_CreateRGBSurface(SDL_SWSURFACE, 30, 30, 32,
 168                 MASK_R, MASK_G, MASK_B, MASK_A);
 169
 170         for(int i=0; i<30; i++)
 171         {
 172                 for(int j=0; j<30; j++)
 173                 {
 174                         uint32 color = (uint32)(((double)(i * j) / (29.0 * 29.0)) * 255.0);
 175                         color = (color << 24) | 0x00FF00FF;
 176                         ((uint32 *)someAlphaSurface->pixels)[(j * 30) + i] = color;
 177                 }
 178         }
 179 //End test code
 180 #endif
 181
 182         WriteLog("Video: Successfully initialized.\n");
 183         return true;
 184 }
 185
 186 //
 187 // Free various SDL components
 188 //
 189 void VideoDone(void)
 190 {
 191         if (settings.useOpenGL)
 192                 sdlemu_close_opengl();
 193
 194         SDL_JoystickClose(joystick);
 195         SDL_FreeSurface(surface);
 196         SDL_QuitSubSystem(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK | SDL_INIT_AUDIO | SDL_INIT_TIMER);
 197         SDL_Quit();
 198 }
 199
 200 //
 201 // Render the screen buffer to the primary screen surface
 202 //
 203 //void RenderBackbuffer(void)
 204 void RenderScreenBuffer(void)
 205 {
 206 //WriteLog("Video: Blitting a %u x %u surface to the main surface...\n", surface->w, surface->h);
 207 //Don't need this crapola--why have a separate buffer just to copy it to THIS
 208 //buffer in order to copy it to the main screen? That's what *I* thought!
 209 /*      if (SDL_MUSTLOCK(surface))
 210                 while (SDL_LockSurface(surface) < 0)
 211                         SDL_Delay(10);
 212
 213         memcpy(surface->pixels, scrBuffer, VIRTUAL_SCREEN_WIDTH * VIRTUAL_SCREEN_HEIGHT * sizeof(uint32));
 214
 215         if (SDL_MUSTLOCK(surface))
 216                 SDL_UnlockSurface(surface);//*/
 217 #ifdef TEST_ALPHA_BLENDING
 218 SDL_Rect dstRect = { 100, 100, 30, 30 };
 219 SDL_BlitSurface(someAlphaSurface, NULL, surface, &dstRect);
 220 #endif
 221
 222         if (settings.useOpenGL)
 223                 sdlemu_draw_texture(mainSurface, surface, 1/*1=GL_QUADS*/);
 224         else
 225         {
 226 //              SDL_Rect rect = { 0, 0, surface->w, surface->h };
 227 //              SDL_BlitSurface(surface, &rect, mainSurface, &rect);
 228                 SDL_BlitSurface(surface, NULL, mainSurface, NULL);
 229                 SDL_Flip(mainSurface);
 230     }
 231 }
 232
 233 /*
 234 //
 235 // Resize the main SDL screen & scrBuffer
 236 //
 237 void ResizeScreen(uint32 width, uint32 height)
 238 {
 239         char window_title[256];
 240
 241         SDL_FreeSurface(surface);
 242         surface = SDL_CreateRGBSurface(SDL_SWSURFACE, width, height, 16,
 243                 0x7C00, 0x03E0, 0x001F, 0);
 244
 245         if (surface == NULL)
 246         {
 247                 WriteLog("Video: Could not create primary SDL surface: %s", SDL_GetError());
 248                 exit(1);
 249         }
 250
 251         if (settings.useOpenGL)
 252                 // This seems to work well for resizing (i.e., changes in the pixel width)...
 253                 sdlemu_resize_texture(surface, mainSurface, settings.glFilter);
 254         else
 255         {
 256                 mainSurface = SDL_SetVideoMode(width, height, 16, mainSurfaceFlags);
 257
 258                 if (mainSurface == NULL)
 259                 {
 260                         WriteLog("Video: SDL is unable to set the video mode: %s\n", SDL_GetError());
 261                         exit(1);
 262                 }
 263         }
 264
 265         sWriteLog(window_title, "Virtual Jaguar (%i x %i)", (int)width, (int)height);
 266         SDL_WM_SetCaption(window_title, window_title);
 267
 268         // This seems to work well for resizing (i.e., changes in the pixel width)...
 269 //      if (settings.useOpenGL)
 270 //              sdlemu_resize_texture(surface, mainSurface);
 271 }*/
 272
 273 /*
 274 //
 275 // Fullscreen <-> window switching
 276 //
 277 //NOTE: This does *NOT* work with OpenGL rendering! !!! FIX !!!
 278 void ToggleFullscreen(void)
 279 {
 280         settings.fullscreen = !settings.fullscreen;
 281         mainSurfaceFlags &= ~SDL_FULLSCREEN;
 282
 283         if (settings.fullscreen)
 284                 mainSurfaceFlags |= SDL_FULLSCREEN;
 285
 286         if (!settings.useOpenGL)
 287                 mainSurface = SDL_SetVideoMode(VIRTUAL_SCREEN_WIDTH, VIRTUAL_SCREEN_HEIGHT, 32, mainSurfaceFlags);
 288         else
 289 //              mainSurface = SDL_SetVideoMode(VIRTUAL_SCREEN_WIDTH * 2, VIRTUAL_SCREEN_HEIGHT * 2, 32, mainSurfaceFlags);
 290 //              mainSurface = SDL_SetVideoMode(VIRTUAL_SCREEN_WIDTH, VIRTUAL_SCREEN_HEIGHT * 2, 32, mainSurfaceFlags);
 291                 mainSurface = SDL_SetVideoMode(VIRTUAL_SCREEN_WIDTH, VIRTUAL_SCREEN_HEIGHT, 32, mainSurfaceFlags);
 292 //      mainSurface = SDL_SetVideoMode(tom_width, tom_height, 16, mainSurfaceFlags);
 293
 294         if (mainSurface == NULL)
 295         {
 296                 WriteLog("Video: SDL is unable to set the video mode: %s\n", SDL_GetError());
 297                 exit(1);
 298         }
 299
 300         SDL_WM_SetCaption("Apple 2 SDL", "Apple 2 SDL");
 301 }
 302 //*/