Shamusworld >> Repos - apple2/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 "log.h"
  19 #include "settings.h"
  20
  21
  22 // Exported global variables (actually, these are LOCAL global variables, EXPORTED...)
  23
  24 static SDL_Window * sdlWindow = NULL;
  25 SDL_Renderer * sdlRenderer = NULL;
  26 static SDL_Texture * sdlTexture = NULL;
  27 uint32_t scrBuffer[VIRTUAL_SCREEN_WIDTH * VIRTUAL_SCREEN_HEIGHT * sizeof(uint32_t)];
  28
  29
  30 //
  31 // Prime SDL and create surfaces
  32 //
  33 bool InitVideo(void)
  34 {
  35         if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK | SDL_INIT_AUDIO | SDL_INIT_TIMER | SDL_INIT_NOPARACHUTE) != 0)
  36         {
  37                 WriteLog("Video: Could not initialize the SDL library: %s\n", SDL_GetError());
  38                 return false;
  39         }
  40
  41         int retVal = SDL_CreateWindowAndRenderer(VIRTUAL_SCREEN_WIDTH * 2, VIRTUAL_SCREEN_HEIGHT * 2, SDL_WINDOW_OPENGL, &sdlWindow, &sdlRenderer);
  42
  43         if (retVal != 0)
  44         {
  45                 WriteLog("Video: Could not window and/or renderer: %s\n", SDL_GetError());
  46                 return false;
  47         }
  48
  49         // Make the scaled rendering look smoother.
  50         SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "linear");
  51 //      SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "nearest");
  52         SDL_RenderSetLogicalSize(sdlRenderer, VIRTUAL_SCREEN_WIDTH, VIRTUAL_SCREEN_HEIGHT);
  53
  54         sdlTexture = SDL_CreateTexture(sdlRenderer,
  55                 SDL_PIXELFORMAT_ABGR8888, SDL_TEXTUREACCESS_STREAMING,
  56                 VIRTUAL_SCREEN_WIDTH, VIRTUAL_SCREEN_HEIGHT);
  57
  58         WriteLog("Video: Successfully initialized.\n");
  59         return true;
  60 }
  61
  62
  63 //
  64 // Free various SDL components
  65 //
  66 void VideoDone(void)
  67 {
  68         WriteLog("Video: Shutting down SDL...\n");
  69         SDL_Quit();
  70         WriteLog("Video: Done.\n");
  71 }
  72
  73
  74 //
  75 // Render the screen buffer to the primary screen surface
  76 //
  77 void RenderScreenBuffer(void)
  78 {
  79         SDL_UpdateTexture(sdlTexture, NULL, scrBuffer, VIRTUAL_SCREEN_WIDTH * sizeof(Uint32));
  80         SDL_RenderClear(sdlRenderer);
  81         SDL_RenderCopy(sdlRenderer, sdlTexture, NULL, NULL);
  82 }
  83
  84
  85 //
  86 // Fullscreen <-> window switching
  87 //
  88 void ToggleFullScreen(void)
  89 {
  90         settings.fullscreen = !settings.fullscreen;
  91
  92         int retVal = SDL_SetWindowFullscreen(sdlWindow, (settings.fullscreen ? SDL_WINDOW_FULLSCREEN_DESKTOP : 0));
  93         SDL_ShowCursor(settings.fullscreen ? 0 : 1);
  94
  95         if (retVal != 0)
  96                 WriteLog("Video::ToggleFullScreen: SDL error = %s\n", SDL_GetError());
  97 }
  98
  99