1 files changed, 26 insertions, 0 deletions
diff --git a/demos/gtk-demo/transition3.glsl b/demos/gtk-demo/transition3.glsl
new file mode 100644
index 0000000000..6b0dee2c77
--- /dev/null
+++ b/demos/gtk-demo/transition3.glsl
@@ -0,0 +1,26 @@
+float progress = u_args.y;
+
+vec4 getFromColor (vec2 uv) {
+  return texture(u_source, uv);
+}
+
+vec4 getToColor (vec2 uv) {
+  return texture(u_source2, uv);
+}
+
+
+// Source: https://gl-transitions.com/editor/crosswarp
+// Author: Eke Péter <peterekepeter@gmail.com>
+// License: MIT
+
+vec4 transition(vec2 p) {
+  float x = progress;
+  x=smoothstep(.0,1.0,(x*2.0+p.x-1.0));
+  return mix(getFromColor((p-.5)*(1.-x)+.5), getToColor((p-.5)*x+.5), x);
+}
+
+
+void mainImage(out vec4 fragColor, in vec2 fragCoord, in vec2 resolution, in vec2 uv)
+{
+  fragColor = transition(uv);
+}