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

   1 //
   2 // VIDEO.CPP: SDL/local hardware specific video routines
   3 //
   4 // by James Hammons
   5 //
   6 // JLH = James 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 #include <string.h>     // Why??? (for memset, etc... Lazy!) Dunno why, but this just strikes me as wrong...
  16 #include <malloc.h>
  17 //#include "gui/gui.h"
  18 #include "icon-64x64.h"
  19 #include "log.h"
  20 //#include "settings.h"
  21
  22
  23 // Exported global variables (actually, these are LOCAL global variables, EXPORTED...)
  24
  25 static SDL_Window * sdlWindow = NULL;
  26 SDL_Renderer * sdlRenderer = NULL;
  27 static SDL_Texture * sdlTexture = NULL;
  28 uint32_t scrBuffer[VIRTUAL_SCREEN_WIDTH * VIRTUAL_SCREEN_HEIGHT * sizeof(uint32_t)];
  29
  30 struct
  31 {
  32         bool fullscreen;
  33 } settings;
  34
  35 //
  36 // Prime SDL and create surfaces
  37 //
  38 bool InitVideo(void)
  39 {
  40         if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK | SDL_INIT_AUDIO | SDL_INIT_TIMER | SDL_INIT_NOPARACHUTE) != 0)
  41         {
  42                 WriteLog("Video: Could not initialize the SDL library: %s\n", SDL_GetError());
  43                 return false;
  44         }
  45
  46         int retVal = SDL_CreateWindowAndRenderer(VIRTUAL_SCREEN_WIDTH * 3, VIRTUAL_SCREEN_HEIGHT * 3, SDL_WINDOW_OPENGL, &sdlWindow, &sdlRenderer);
  47
  48         if (retVal != 0)
  49         {
  50                 WriteLog("Video: Could not create window and/or renderer: %s\n", SDL_GetError());
  51                 return false;
  52         }
  53
  54         // Make the scaled rendering look smoother.
  55 //      SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "linear");
  56         SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "nearest");
  57         SDL_RenderSetLogicalSize(sdlRenderer, VIRTUAL_SCREEN_WIDTH, VIRTUAL_SCREEN_HEIGHT);
  58
  59         // Set the application's icon & title...
  60         SDL_Surface * iconSurface = SDL_CreateRGBSurfaceFrom(icon, 64, 64, 32, 64*4, 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000);
  61         SDL_SetWindowIcon(sdlWindow, iconSurface);
  62         SDL_FreeSurface(iconSurface);
  63         SDL_SetWindowTitle(sdlWindow, "Thunder Emulator");
  64
  65         sdlTexture = SDL_CreateTexture(sdlRenderer,
  66                 SDL_PIXELFORMAT_ABGR8888, SDL_TEXTUREACCESS_STREAMING,
  67                 VIRTUAL_SCREEN_WIDTH, VIRTUAL_SCREEN_HEIGHT);
  68
  69         WriteLog("Video: Successfully initialized.\n");
  70         return true;
  71 }
  72
  73 //
  74 // Free various SDL components
  75 //
  76 void VideoDone(void)
  77 {
  78         WriteLog("Video: Shutting down SDL...\n");
  79         SDL_Quit();
  80         WriteLog("Video: Done.\n");
  81 }
  82
  83 //
  84 // Render the screen buffer to the primary screen surface
  85 //
  86 void RenderScreenBuffer(void)
  87 {
  88         SDL_UpdateTexture(sdlTexture, NULL, scrBuffer, VIRTUAL_SCREEN_WIDTH * sizeof(Uint32));
  89         SDL_RenderClear(sdlRenderer);
  90         SDL_RenderCopy(sdlRenderer, sdlTexture, NULL, NULL);
  91         SDL_RenderPresent(sdlRenderer);
  92 }
  93
  94 //
  95 // Fullscreen <-> window switching
  96 //
  97 void ToggleFullScreen(void)
  98 {
  99         settings.fullscreen = !settings.fullscreen;
 100
 101         int retVal = SDL_SetWindowFullscreen(sdlWindow, (settings.fullscreen ? SDL_WINDOW_FULLSCREEN_DESKTOP : 0));
 102         SDL_ShowCursor(settings.fullscreen ? 0 : 1);
 103
 104         if (retVal != 0)
 105                 WriteLog("Video::ToggleFullScreen: SDL error = %s\n", SDL_GetError());
 106 }