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gl: Make blur nodes with radius ∈ ]0; 1[

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Otherwise, the radius here ends up being 0 and we don't draw anything at
all.
This commit is contained in:
Timm Bäder 2018-02-27 14:22:08 +01:00
parent cac3e7705d
commit d2b5436462
1 changed files with 1 additions and 1 deletions
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gsk/resources/glsl/blur.fs.glsl
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@ -14,7 +14,7 @@ vec4 blur_pixel (in vec2 uv) {
// XXX The magic value here is GAUSSIAN_SCALE_FACTOR from gskcairoblur.c
float radius = u_blur_radius * 2.30348;
int half_radius = int(radius / 2.0);
int half_radius = max(int(radius / 2.0), 1);
for (int y = -half_radius; y < half_radius; y ++) {
float fy = Gaussian (radius / 2.0, float(y));