1 files changed, 84 insertions, 0 deletions
diff --git a/src/tools/tileset_borderfix.cpp b/src/tools/tileset_borderfix.cpp
new file mode 100644
index 00000000..9541919f
--- /dev/null
+++ b/src/tools/tileset_borderfix.cpp
@@ -0,0 +1,84 @@
+/* (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 main(int argc, char **argv)
+{
+	png_t Png;
+	CPixel *pBuffer[2] = {0,0};
+	
+	png_init(0, 0);
+	png_open_file(&Png, argv[1]);
+	
+	if(Png.color_type != PNG_TRUECOLOR_ALPHA)
+	{
+		dbg_msg("dilate", "not an RGBA image");
+		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, argv[1]);
+	png_set_data(&Png, w, h, 8, PNG_TRUECOLOR_ALPHA, (unsigned char *)pBuffer[1]);
+	png_close_file(&Png);
+		
+	return 0;
+}