src/video.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4
   5 #include "video.h"
   6
   7
   8 ////////////////////////////////////////////////////////////////////////////////
   9 SDL_Surface *screen = NULL;
  10 Uint32 palette[256]; // converted
  11 Uint8 font[256][8];
  12
  13
  14 ////////////////////////////////////////////////////////////////////////////////
  15 static void quitCleanupCB (void) {
  16   //if (TTF_WasInit()) TTF_Quit();
  17   SDL_Quit();
  18 }
  19
  20
  21 ////////////////////////////////////////////////////////////////////////////////
  22 void sdlInit (void) {
  23   if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER) < 0) {
  24     fprintf(stderr, "FATAL: can't set videomode!\n");
  25     exit(1);
  26   }
  27   atexit(quitCleanupCB);
  28   //
  29   SDL_WM_SetCaption("Awish", "Awish");
  30   SDL_EnableKeyRepeat(200, 25);
  31   //SDL_EnableUNICODE(1); // just4fun
  32   SDL_EnableUNICODE(0); // just4fun
  33 }
  34
  35
  36 void initVideo (void) {
  37   screen = SDL_SetVideoMode(640, 400, 32, SDL_SWSURFACE/*|SDL_DOUBLEBUF*/);
  38   if (screen == NULL) {
  39     fprintf(stderr, "FATAL: can't set videomode!\n");
  40     exit(1);
  41   }
  42   //fprintf(stderr, "BPP: %u\n", screen->format->BytesPerPixel);
  43 }
  44
  45
  46 ////////////////////////////////////////////////////////////////////////////////
  47 // create 24bpp surface with color key
  48 SDL_Surface *createSurface (int w, int h) {
  49   //Uint32 rmask, gmask, bmask/*, amask*/;
  50   SDL_Surface *s;
  51   //
  52   if (w < 1 || h < 1) return NULL;
  53 /*
  54 #if SDL_BYTEORDER == SDL_BIG_ENDIAN
  55     rmask = 0xff000000;
  56     gmask = 0x00ff0000;
  57     bmask = 0x0000ff00;
  58     //amask = 0x000000ff;
  59 #else
  60     rmask = 0x000000ff;
  61     gmask = 0x0000ff00;
  62     bmask = 0x00ff0000;
  63     //amask = 0xff000000;
  64 #endif
  65   s = SDL_CreateRGBSurface(SDL_SRCCOLORKEY, w, h, 32, rmask, gmask, bmask, amask);
  66 */
  67   s = SDL_CreateRGBSurface(SDL_SRCCOLORKEY, w, h, screen->format->BitsPerPixel, screen->format->Rmask, screen->format->Gmask, screen->format->Bmask, screen->format->Amask);
  68   if (s != NULL) {
  69     SDL_SetColorKey(s, SDL_SRCCOLORKEY, palette[255]);
  70   }
  71   return s;
  72 }
  73
  74
  75 void blitSurfaceEx (SDL_Surface *dests, int destx, int desty, SDL_Surface *srcs, int srcx, int srcy, int srcw, int srch) {
  76   SDL_Rect src, dst;
  77   //
  78   if (srcw < 0) srcw = srcs->w;
  79   if (srch < 0) srch = srcs->h;
  80   src.x = srcx;
  81   src.y = srcy;
  82   src.w = srcw;
  83   src.h = srch;
  84   dst.x = destx;
  85   dst.y = desty;
  86   SDL_BlitSurface(srcs, &src, dests, &dst);
  87 }
  88
  89
  90 ////////////////////////////////////////////////////////////////////////////////
  91 void lockSurface (SurfaceLock *lock, SDL_Surface *s) {
  92   if (lock) {
  93     lock->s = s;
  94     lock->needUnlock = 0;
  95     if (s != NULL && SDL_MUSTLOCK(s)) {
  96       lock->needUnlock = (SDL_LockSurface(s) == 0);
  97     }
  98   }
  99 }
 100
 101
 102 void unlockSurface (SurfaceLock *lock) {
 103   if (lock && lock->s && lock->needUnlock) {
 104     SDL_UnlockSurface(lock->s);
 105     lock->needUnlock = 0;
 106   }
 107 }
 108
 109
 110 ////////////////////////////////////////////////////////////////////////////////
 111 // surface must be locked!
 112 void drawChar (SDL_Surface *s, char ch, int x, int y, Uint8 clr) {
 113   unsigned char c = (unsigned char)(ch);
 114   //
 115   for (int dy = 0; dy < 8; ++dy) {
 116     Uint8 b = font[c][dy];
 117     //
 118     for (int dx = 0; dx < 8; ++dx) {
 119       if (b&0x80) putPixel2x(s, x+dx, y+dy, clr);
 120       b = (b&0x7f)<<1;
 121     }
 122   }
 123 }
 124
 125
 126 void drawString (SDL_Surface *s, const char *str, int x, int y, Uint8 clr) {
 127   for (; *str; ++str) {
 128     drawChar(s, *str, x, y, clr);
 129     x += 8;
 130   }
 131 }