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/* (c) Magnus Auvinen. See licence.txt in the root of the distribution for more information. */
/* If you are missing that file, acquire a complete release at teeworlds.com. */
#include <base/system.h>
#include <engine/external/pnglite/pnglite.h>
typedef struct
{
unsigned char r, g, b, a;
} CPixel;
static CPixel Sample(int x, int y, int w, int h, CPixel *pData, int Pitch, float u, float v)
{
x = x + (int)(w*u);
y = y + (int)(h*v);
return pData[y*Pitch+x];
}
static void TilesetBorderfix(int w, int h, CPixel *pSrc, CPixel *pDest)
{
int TileW = w/16;
int TileH = h/16;
mem_zero(pDest, sizeof(CPixel)*w*h);
for(int ty = 0; ty < 16; ty++)
{
for(int tx = 0; tx < 16; tx++)
{
for(int y = 0; y < TileH-2; y++)
{
for(int x = 0; x < TileW-2; x++)
{
float u = 0.5f/TileW + x/(float)(TileW-2);
float v = 0.5f/TileH + y/(float)(TileH-2);
int k = (ty*TileH+1+y)*w + tx*TileW+x+1;
pDest[k] = Sample(tx*TileW, ty*TileH, TileW, TileH, pSrc, w, u, v);
if(x == 0) pDest[k-1] = pDest[k];
if(x == TileW-2-1) pDest[k+1] = pDest[k];
if(y == 0) pDest[k-w] = pDest[k];
if(y == TileH-2-1) pDest[k+w] = pDest[k];
if(x == 0 && y == 0) pDest[k-w-1] = pDest[k];
if(x == TileW-2-1 && y == 0) pDest[k-w+1] = pDest[k];
if(x == 0 && y == TileH-2-1) pDest[k+w-1] = pDest[k];
if(x == TileW-2-1 && y == TileH-2-1) pDest[k+w+1] = pDest[k];
}
}
}
}
}
int FixFile(const char *pFileName)
{
png_t Png;
CPixel *pBuffer[2] = {0,0};
png_init(0, 0);
png_open_file(&Png, pFileName);
if(Png.color_type != PNG_TRUECOLOR_ALPHA)
{
dbg_msg("tileset_borderfix", "%s: not an RGBA image", pFileName);
return 1;
}
int w = Png.width;
int h = Png.height;
pBuffer[0] = (CPixel*)mem_alloc(w*h*sizeof(CPixel), 1);
pBuffer[1] = (CPixel*)mem_alloc(w*h*sizeof(CPixel), 1);
png_get_data(&Png, (unsigned char *)pBuffer[0]);
png_close_file(&Png);
TilesetBorderfix(w, h, pBuffer[0], pBuffer[1]);
// save here
png_open_file_write(&Png, pFileName);
png_set_data(&Png, w, h, 8, PNG_TRUECOLOR_ALPHA, (unsigned char *)pBuffer[1]);
png_close_file(&Png);
return 0;
}
int main(int argc, const char **argv)
{
dbg_logger_stdout();
if(argc == 1)
{
dbg_msg("Usage", "%s FILE1 [ FILE2... ]", argv[0]);
return -1;
}
for(int i = 1; i < argc; i++)
FixFile(argv[i]);
return 0;
}
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