diff -r 082bfaf38cf0 -r 43297144f196 render_mandelbrot.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/render_mandelbrot.c	Fri Jun 06 23:37:45 2008 +0300
@@ -0,0 +1,54 @@
+
+#include "common.h"
+#include "render_internal.h"
+#include "render_mandelbrot.h"
+
+#define DETAIL 255
+
+#define absdelta(a, b) (a>b ? a-b : b-a)
+
+int render_mandelbrot (struct render *ctx) {
+    // render algorithm vars
+    u_int32_t img_x, img_y;
+    double x0, y0, x, y, _x, _y, w_scale, h_scale;
+    u_int8_t iter;
+
+    // calcluate the scale factors
+    w_scale = ctx->img_w/absdelta(ctx->x1, ctx->x2);
+    h_scale = ctx->img_h/absdelta(ctx->y1, ctx->y2);
+    
+    // start rendering!
+    for (img_y=0; img_y < ctx->img_h; img_y++) {
+        // render the current row
+        for (img_x=0; img_x < ctx->img_w; img_x++) {
+            x = 0;
+            y = 0;
+            x0 = img_x/w_scale + ctx->x1;
+            y0 = img_y/h_scale + ctx->y1;
+            iter = DETAIL; 
+
+            while (x*x + y*y < (2*2) && iter > 0) {
+                _x = x*x - y*y + x0;
+                _y = 2*x*y + y0;
+
+                x = _x;
+                y = _y;
+
+                iter--;
+            }
+            
+            (*ctx->local_rowbuf_addr)[img_x] = iter;
+        }
+
+        // row cb
+        if (ctx->local_row_fn(ctx->cb_arg, (*ctx->local_rowbuf_addr)))
+            ERROR("local_row_fn");
+    }
+   
+    // return succesfully
+    return 0;
+
+error:
+    return -1;
+}
+