From 5bd2c434f63ff4a039e854d647f02ef660c544d1 Mon Sep 17 00:00:00 2001
From: Magnus Auvinen <magnus.auvinen@gmail.com>
Date: Tue, 24 Jul 2007 22:53:43 +0000
Subject: epic commit. removed tga support, removed BGR support. fixed one
 config for editor, server and client, optimized tilemap rendering (this needs
 some cleanup), added tools to fix alpha outline quirk and glitches in the
 tilemap reindering

---
 src/tools/dilate.c | 98 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 src/tools/dilate.c

(limited to 'src/tools/dilate.c')

diff --git a/src/tools/dilate.c b/src/tools/dilate.c
new file mode 100644
index 00000000..f53e7656
--- /dev/null
+++ b/src/tools/dilate.c
@@ -0,0 +1,98 @@
+
+#include "../engine/client/pnglite/pnglite.c"
+
+typedef struct pixel_t
+{
+	unsigned char r, g, b, a;
+} pixel;
+
+static int clamp(int v, int min, int max)
+{
+	if(v > max)
+		return max;
+	if(v < min)
+		return min;
+	return v;
+}
+
+static void dilate(int w, int h, pixel *src, pixel *dst)
+{
+	int x, y, k, m, c;
+	int ix, iy;
+
+	m = 0;
+	for(y = 0; y < h; y++)
+	{
+		for(x = 0; x < w; x++, m++)
+		{
+			dst[m] = src[m];
+			if(src[m].a)
+				continue;
+			
+			const int xo[] = {0, -1, 1, 0};
+			const int yo[] = {-1, 0, 0, 1};
+			for(c = 0; c < 4; c++)
+			{
+				ix = clamp(x + xo[c], 0, w-1);
+				iy = clamp(y + yo[c], 0, h-1);
+				k = iy*w+ix;
+				if(src[k].a)
+				{
+					dst[m] = src[k];
+					dst[m].a = 255;
+					break;
+				}
+			}
+		}
+	}
+}
+
+static void copy_alpha(int w, int h, pixel *src, pixel *dst)
+{
+	int x, y, m;
+
+	for(y = 0; y < h; y++)
+		for(x = 0; x < w; x++, m++)
+			dst[m].a = src[m].a;
+}
+
+int main(int argc, char **argv)
+{
+	png_t png;
+	pixel *buffer[3] = {0,0,0};
+	int i, w, h;
+	
+	png_init(0,0);
+	png_open_file(&png, argv[1]);
+	
+	if(png.color_type != PNG_TRUECOLOR_ALPHA)
+	{
+		printf("not an RGBA image\n");
+		return -1;
+	}
+	
+	buffer[0] = (pixel*)malloc(png.width*png.height*sizeof(pixel));
+	buffer[1] = (pixel*)malloc(png.width*png.height*sizeof(pixel));
+	buffer[2] = (pixel*)malloc(png.width*png.height*sizeof(pixel));
+	png_get_data(&png, (unsigned char *)buffer[0]);
+	png_close_file(&png);
+	
+	w = png.width;
+	h = png.height;
+	
+	dilate(w, h, buffer[0], buffer[1]);
+	for(i = 0; i < 5; i++)
+	{
+		dilate(w, h, buffer[1], buffer[2]);
+		dilate(w, h, buffer[2], buffer[1]);
+	}
+	
+	copy_alpha(w, h, buffer[0], buffer[1]);
+	
+	// save here
+	png_open_file_write(&png, argv[1]);
+	png_set_data(&png, w, h, 8, PNG_TRUECOLOR_ALPHA, (unsigned char *)buffer[1]);
+	png_close_file(&png);
+	
+	return 0;
+}
-- 
cgit 1.4.1