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- added libdrawtext
[demo_prior]
/
sdr
/
vignette.p.glsl
diff --git a/sdr/vignette.p.glsl
b/sdr/vignette.p.glsl
new file mode 100644
(file)
index 0000000..
ca28cb9
--- /dev/null
+++ b/
sdr/vignette.p.glsl
@@ -0,0
+1,11
@@
+uniform vec3 color;
+uniform float offset, sharpness;
+
+void main()
+{
+ vec2 p = gl_TexCoord[0].st * 2.0 - 1.0;
+ float d = max(length(p) - offset, 0.0);
+ float vnt = pow(d, sharpness);
+
+ gl_FragColor = vec4(color, gl_Color.a * vnt);
+}