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rendernode: Blur alpha channel for cairo blur node

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The blur node still doesn't properly blur with a transform, but at least
it now doesn't turn semi-transparent stuff black.
This commit is contained in:
Benjamin Otte
2019-05-20 03:24:24 +02:00
parent b37c2216fc
commit 29cb9230bf
1 changed files with 6 additions and 0 deletions
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6
gsk/gskrendernodeimpl.c
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@@ -3666,6 +3666,7 @@ blur_once (cairo_surface_t *src,
r += c1[0];
g += c1[1];
b += c1[2];
a += c1[3];
}
p_dest_row = p_dest;
for (x = 0; x < width; x++)
@@ -3674,6 +3675,7 @@ blur_once (cairo_surface_t *src,
p_dest_row[0] = div_kernel_size[r];
p_dest_row[1] = div_kernel_size[g];
p_dest_row[2] = div_kernel_size[b];
p_dest_row[3] = div_kernel_size[a];
p_dest_row += n_channels;
/* the pixel to add to the kernel */
@@ -3692,6 +3694,7 @@ blur_once (cairo_surface_t *src,
r += c1[0] - c2[0];
g += c1[1] - c2[1];
b += c1[2] - c2[2];
a += c1[3] - c2[3];
}
p_src += src_rowstride;
@@ -3715,6 +3718,7 @@ blur_once (cairo_surface_t *src,
r += c1[0];
g += c1[1];
b += c1[2];
a += c1[3];
}
p_dest_col = p_dest;
@@ -3725,6 +3729,7 @@ blur_once (cairo_surface_t *src,
p_dest_col[0] = div_kernel_size[r];
p_dest_col[1] = div_kernel_size[g];
p_dest_col[2] = div_kernel_size[b];
p_dest_col[3] = div_kernel_size[a];
p_dest_col += dest_rowstride;
/* the pixel to add to the kernel */
@@ -3742,6 +3747,7 @@ blur_once (cairo_surface_t *src,
r += c1[0] - c2[0];
g += c1[1] - c2[1];
b += c1[2] - c2[2];
a += c1[3] - c2[3];
}
p_src += n_channels;