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cairoblur: Fix the blur code

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We weren't passing in the right "d" value, which was causing the blur to
behave incorrectly, especially in the case of 1px blurs, which would
cause no blurs at all.

The blur should now match the web.
This commit is contained in:
Jasper St. Pierre 2014-10-27 10:05:35 -07:00
parent 3013997e23
commit ac9ac55555
1 changed files with 3 additions and 2 deletions
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5
gtk/gtkcairoblur.c
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@ -147,6 +147,7 @@ _boxblur (guchar *buffer,
int radius)
{
guchar *flipped_buffer;
int d = _gtk_cairo_blur_compute_pixels (radius);
flipped_buffer = g_malloc (width * height);
@ -154,13 +155,13 @@ _boxblur (guchar *buffer,
flip_buffer (flipped_buffer, buffer, width, height);
/* Step 2: blur rows (really columns) */
blur_rows (flipped_buffer, buffer, height, width, radius);
blur_rows (flipped_buffer, buffer, height, width, d);
/* Step 3: swap rows and columns */
flip_buffer (buffer, flipped_buffer, height, width);
/* Step 4: blur rows */
blur_rows (buffer, flipped_buffer, width, height, radius);
blur_rows (buffer, flipped_buffer, width, height, d);
g_free (flipped_buffer);
}