src/tools/tileset_borderfix.cpp

   1 /* (c) Magnus Auvinen. See licence.txt in the root of the distribution for more information. */
   2 /* If you are missing that file, acquire a complete release at teeworlds.com.                */
   3 #include <base/system.h>
   4 #include <engine/external/pnglite/pnglite.h>
   5
   6 typedef struct
   7 {
   8         unsigned char r, g, b, a;
   9 } CPixel;
  10
  11 static CPixel Sample(int x, int y, int w, int h, CPixel *pData, int Pitch, float u, float v)
  12 {
  13         x = x + (int)(w*u);
  14         y = y + (int)(h*v);
  15         return pData[y*Pitch+x];
  16 }
  17
  18 static void TilesetBorderfix(int w, int h, CPixel *pSrc, CPixel *pDest)
  19 {
  20         int TileW = w/16;
  21         int TileH = h/16;
  22
  23         mem_zero(pDest, sizeof(CPixel)*w*h);
  24
  25         for(int ty = 0; ty < 16; ty++)
  26         {
  27                 for(int tx = 0; tx < 16; tx++)
  28                 {
  29                         for(int y = 0; y < TileH-2; y++)
  30                         {
  31                                 for(int x = 0; x < TileW-2; x++)
  32                                 {
  33                                         float u = 0.5f/TileW + x/(float)(TileW-2);
  34                                         float v = 0.5f/TileH + y/(float)(TileH-2);
  35                                         int k = (ty*TileH+1+y)*w + tx*TileW+x+1;
  36                                         pDest[k] = Sample(tx*TileW, ty*TileH, TileW, TileH, pSrc, w, u, v);
  37
  38                                         if(x == 0) pDest[k-1] = pDest[k];
  39                                         if(x == TileW-2-1) pDest[k+1] = pDest[k];
  40                                         if(y == 0) pDest[k-w] = pDest[k];
  41                                         if(y == TileH-2-1) pDest[k+w] = pDest[k];
  42
  43                                         if(x == 0 && y == 0) pDest[k-w-1] = pDest[k];
  44                                         if(x == TileW-2-1 && y == 0) pDest[k-w+1] = pDest[k];
  45                                         if(x == 0 && y == TileH-2-1) pDest[k+w-1] = pDest[k];
  46                                         if(x == TileW-2-1 && y == TileH-2-1) pDest[k+w+1] = pDest[k];
  47                                 }
  48                         }
  49                 }
  50         }
  51 }
  52
  53
  54 int FixFile(const char *pFileName)
  55 {
  56         png_t Png;
  57         CPixel *pBuffer[2] = {0,0};
  58
  59         png_init(0, 0);
  60         png_open_file(&Png, pFileName);
  61
  62         if(Png.color_type != PNG_TRUECOLOR_ALPHA)
  63         {
  64                 dbg_msg("tileset_borderfix", "%s: not an RGBA image", pFileName);
  65                 return 1;
  66         }
  67
  68         int w = Png.width;
  69         int h = Png.height;
  70
  71         pBuffer[0] = (CPixel*)mem_alloc(w*h*sizeof(CPixel), 1);
  72         pBuffer[1] = (CPixel*)mem_alloc(w*h*sizeof(CPixel), 1);
  73         png_get_data(&Png, (unsigned char *)pBuffer[0]);
  74         png_close_file(&Png);
  75
  76         TilesetBorderfix(w, h, pBuffer[0], pBuffer[1]);
  77
  78         // save here
  79         png_open_file_write(&Png, pFileName);
  80         png_set_data(&Png, w, h, 8, PNG_TRUECOLOR_ALPHA, (unsigned char *)pBuffer[1]);
  81         png_close_file(&Png);
  82
  83         return 0;
  84 }
  85
  86 int main(int argc, const char **argv)
  87 {
  88         dbg_logger_stdout();
  89         if(argc == 1)
  90         {
  91                 dbg_msg("Usage", "%s FILE1 [ FILE2... ]", argv[0]);
  92                 return -1;
  93         }
  94
  95         for(int i = 1; i < argc; i++)
  96                 FixFile(argv[i]);
  97         return 0;
  98 }