Shamusworld >> Repos - legend/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 //
  11
  12 #include "video.h"
  13 #include <string.h>     // Why??? (for memset, etc... Lazy!) Dunno why, but this just strikes me as wrong...
  14 #include <malloc.h>
  15 #include <SDL2/SDL_image.h>
  16 #include "log.h"
  17
  18
  19 // Exported global variables (actually, these are LOCAL global variables, EXPORTED...)
  20
  21 static SDL_Window * sdlWindow = NULL;
  22 SDL_Renderer * sdlRenderer = NULL;
  23 static SDL_Texture * sdlTexture = NULL;
  24 uint32_t scrBuffer[VIRTUAL_SCREEN_WIDTH * VIRTUAL_SCREEN_HEIGHT * sizeof(uint32_t)];
  25 bool fullscreen = false;
  26
  27
  28 //
  29 // Prime SDL and create surfaces
  30 //
  31 bool InitVideo(void)
  32 {
  33         if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK | SDL_INIT_AUDIO | SDL_INIT_TIMER | SDL_INIT_NOPARACHUTE) != 0)
  34         {
  35                 WriteLog("Video: Could not initialize the SDL library: %s\n", SDL_GetError());
  36                 return false;
  37         }
  38
  39         int retVal = SDL_CreateWindowAndRenderer(VIRTUAL_SCREEN_WIDTH * 2, VIRTUAL_SCREEN_HEIGHT * 2, SDL_WINDOW_OPENGL, &sdlWindow, &sdlRenderer);
  40
  41         if (retVal != 0)
  42         {
  43                 WriteLog("Video: Could not window and/or renderer: %s\n", SDL_GetError());
  44                 return false;
  45         }
  46
  47         // Set up SDL_image
  48         retVal = IMG_Init(IMG_INIT_PNG);
  49
  50         if (retVal != IMG_INIT_PNG)
  51         {
  52                 WriteLog("Video: Could not init SDL_image for PNG loading!\n");
  53                 WriteLog("IMG_Init: %s\n", IMG_GetError());
  54         }
  55
  56         // Make the scaled rendering look smoother.
  57         SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "linear");
  58 //      SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "nearest");
  59         SDL_RenderSetLogicalSize(sdlRenderer, VIRTUAL_SCREEN_WIDTH, VIRTUAL_SCREEN_HEIGHT);
  60
  61         // Set the application's icon & title...
  62 //      SDL_Surface * iconSurface = SDL_CreateRGBSurfaceFrom(icon, 64, 64, 32, 64*4, 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000);
  63 //      SDL_SetWindowIcon(sdlWindow, iconSurface);
  64 //      SDL_FreeSurface(iconSurface);
  65         SDL_SetWindowTitle(sdlWindow, "Legend of ?");
  66
  67         sdlTexture = SDL_CreateTexture(sdlRenderer,
  68                 SDL_PIXELFORMAT_ABGR8888, SDL_TEXTUREACCESS_STREAMING,
  69                 VIRTUAL_SCREEN_WIDTH, VIRTUAL_SCREEN_HEIGHT);
  70
  71         WriteLog("Video: Successfully initialized.\n");
  72         return true;
  73 }
  74
  75
  76 //
  77 // Free various SDL components
  78 //
  79 void VideoDone(void)
  80 {
  81         WriteLog("Video: Shutting down SDL...\n");
  82         IMG_Quit();
  83         SDL_Quit();
  84         WriteLog("Video: Done.\n");
  85 }
  86
  87
  88 //
  89 // Render the screen buffer to the primary screen surface
  90 //
  91 void RenderScreenBuffer(void)
  92 {
  93         SDL_UpdateTexture(sdlTexture, NULL, scrBuffer, VIRTUAL_SCREEN_WIDTH * sizeof(Uint32));
  94         SDL_RenderClear(sdlRenderer);
  95         SDL_RenderCopy(sdlRenderer, sdlTexture, NULL, NULL);
  96 }
  97
  98
  99 //
 100 // Fullscreen <-> window switching
 101 //
 102 void ToggleFullScreen(void)
 103 {
 104         fullscreen = !fullscreen;
 105
 106         int retVal = SDL_SetWindowFullscreen(sdlWindow, (fullscreen ? SDL_WINDOW_FULLSCREEN_DESKTOP : 0));
 107         SDL_ShowCursor(fullscreen ? 0 : 1);
 108
 109         if (retVal != 0)
 110                 WriteLog("Video::ToggleFullScreen: SDL error = %s\n", SDL_GetError());
 111 }
 112
 113