Shamusworld >> Repos - stargem2/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 #include <SDL2/SDL.h>
   9 #include <string.h>     // Why??? (for memset, etc... Lazy!) Dunno why, but this just strikes me as wrong...
  10 #include <malloc.h>
  11 #include "log.h"
  12 #include "settings.h"
  13
  14
  15 // Exported global variables (actually, these are LOCAL global variables, EXPORTED...)
  16
  17 static SDL_Window * sdlWindow = NULL;
  18 static SDL_Renderer * sdlRenderer = NULL;
  19 static SDL_Texture * sdlTexture = NULL;
  20 uint32_t scrBuffer[VIRTUAL_SCREEN_WIDTH * VIRTUAL_SCREEN_HEIGHT * sizeof(uint32_t)];
  21
  22
  23 //
  24 // Prime SDL and create surfaces
  25 //
  26 bool InitVideo(void)
  27 {
  28         if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK | SDL_INIT_AUDIO | SDL_INIT_TIMER | SDL_INIT_NOPARACHUTE) != 0)
  29         {
  30                 WriteLog("Video: Could not initialize the SDL library: %s\n", SDL_GetError());
  31                 return false;
  32         }
  33
  34         int retVal = SDL_CreateWindowAndRenderer(VIRTUAL_SCREEN_WIDTH * 3, VIRTUAL_SCREEN_HEIGHT * 3, SDL_WINDOW_OPENGL, &sdlWindow, &sdlRenderer);
  35
  36         if (retVal != 0)
  37         {
  38                 WriteLog("Video: Could not window and/or renderer: %s\n", SDL_GetError());
  39                 return false;
  40         }
  41
  42         // Make the scaled rendering look smoother.
  43 //      SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "linear");
  44         SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "nearest");
  45         SDL_RenderSetLogicalSize(sdlRenderer, VIRTUAL_SCREEN_WIDTH, VIRTUAL_SCREEN_HEIGHT);
  46
  47         sdlTexture = SDL_CreateTexture(sdlRenderer,
  48                 SDL_PIXELFORMAT_ABGR8888, SDL_TEXTUREACCESS_STREAMING,
  49                 VIRTUAL_SCREEN_WIDTH, VIRTUAL_SCREEN_HEIGHT);
  50
  51         WriteLog("Video: Successfully initialized.\n");
  52         return true;
  53 }
  54
  55
  56 //
  57 // Free various SDL components
  58 //
  59 void VideoDone(void)
  60 {
  61         SDL_Quit();
  62 }
  63
  64
  65 //
  66 // Render the backbuffer to the primary screen surface
  67 //
  68 void RenderScreenBuffer(void)
  69 {
  70         SDL_UpdateTexture(sdlTexture, NULL, scrBuffer, VIRTUAL_SCREEN_WIDTH * sizeof(Uint32));
  71         SDL_RenderClear(sdlRenderer);
  72         SDL_RenderCopy(sdlRenderer, sdlTexture, NULL, NULL);
  73         SDL_RenderPresent(sdlRenderer);
  74 }
  75
  76
  77 //
  78 // Fullscreen <-> window switching
  79 //
  80 void ToggleFullScreen(void)
  81 {
  82         settings.fullscreen = !settings.fullscreen;
  83         int retVal;
  84
  85         if (settings.fullscreen)
  86         {
  87                 retVal = SDL_SetWindowFullscreen(sdlWindow, SDL_WINDOW_FULLSCREEN_DESKTOP);
  88                 SDL_ShowCursor(0);
  89         }
  90         else
  91         {
  92                 retVal = SDL_SetWindowFullscreen(sdlWindow, 0);
  93                 SDL_ShowCursor(1);
  94         }
  95
  96         if (retVal != 0)
  97         {
  98                 WriteLog("Video::ToggleFullScreen: SDL error = %s\n", SDL_GetError());
  99         }
 100 }
 101