Merge lp:~robert-ancell/unity-greeter/dead-gaussian-blur-code into lp:unity-greeter

[Robert Ancell]

Drop unused code for Gaussian blur

[Robert Ancell (robert-ancell)]

review: Approve

=== modified file 'src/cairo-utils.vala'
--- src/cairo-utils.vala	2013-11-12 07:20:48 +0000
+++ src/cairo-utils.vala	2014-04-30 00:14:04 +0000
@@ -38,81 +38,6 @@
     c.rel_curve_to (0, -kappa, radius - kappa, -radius, radius, -radius);
 }
 
-class GaussianBlur
-{
-    /* Gaussian Blur, based on Mirco Mueller work on notify-osd */
-
-    public static void surface (Cairo.ImageSurface surface, uint radius, double sigma = 0.0f)
-    {
-        if (surface.get_format () != Cairo.Format.ARGB32)
-        {
-            warning ("Impossible to blur a non ARGB32-formatted ImageSurface");
-            return;
-        }
-
-        surface.flush ();
-
-        double radiusf = Math.fabs (radius) + 1.0f;
-
-        if (sigma == 0.0f)
-            sigma = Math.sqrt (-(radiusf * radiusf) / (2.0f * Math.log (1.0f / 255.0f)));
-
-        int w = surface.get_width ();
-        int h = surface.get_height ();
-        int s = surface.get_stride ();
-
-        // create pixman image for cairo image surface
-        unowned uchar[] p = surface.get_data ();
-        var src = new Pixman.Image.bits (Pixman.Format.A8R8G8B8, w, h, p, s);
-
-        // attach gaussian kernel to pixman image
-        var params = create_gaussian_blur_kernel ((int) radius, sigma);
-        src.set_filter (Pixman.Filter.CONVOLUTION, params);
-
-        // render blured image to new pixman image
-        Pixman.Image.composite (Pixman.Operation.SRC, src, null, src,
-                                0, 0, 0, 0, 0, 0, (uint16) w, (uint16) h);
-
-        surface.mark_dirty ();
-    }
-
-    private static Pixman.Fixed[] create_gaussian_blur_kernel (int radius, double sigma)
-    {
-        double scale2 = 2.0f * sigma * sigma;
-        double scale1 = 1.0f / (Math.PI * scale2);
-        int size = 2 * radius + 1;
-        int n_params = size * size;
-        double sum = 0;
-
-        var tmp = new double[n_params];
-
-        // caluclate gaussian kernel in floating point format
-        for (int i = 0, x = -radius; x <= radius; ++x)
-        {
-            for (int y = -radius; y <= radius; ++y, ++i)
-            {
-                double u = x * x;
-                double v = y * y;
-
-                tmp[i] = scale1 * Math.exp (-(u+v)/scale2);
-
-                sum += tmp[i];
-            }
-        }
-
-        // normalize gaussian kernel and convert to fixed point format
-        var params = new Pixman.Fixed[n_params + 2];
-
-        params[0] = Pixman.Fixed.int (size);
-        params[1] = Pixman.Fixed.int (size);
-
-        for (int i = 2; i < params.length; ++i)
-            params[i] = Pixman.Fixed.double (tmp[i] / sum);
-
-        return params;
-    }
-}
-
 class ExponentialBlur
 {
     /* Exponential Blur, based on the Nux version */