Shamusworld >> Repos - stargem2/blob - src/video.cpp

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