From b93fa7e2e807271dd51b9c4ec47b2f86311a61a8 Mon Sep 17 00:00:00 2001
From: Zack Rusin <zack@kde.org>
Date: Sat, 15 May 2010 00:58:02 -0400
Subject: [PATCH] vpglsl: add some simple tests with function calls

---
 progs/vpglsl/func.glsl  | 33 ++++++++++++++++++++++++++++++
 progs/vpglsl/func2.glsl | 54 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 87 insertions(+)
 create mode 100644 progs/vpglsl/func.glsl
 create mode 100644 progs/vpglsl/func2.glsl

diff --git a/progs/vpglsl/func.glsl b/progs/vpglsl/func.glsl
new file mode 100644
index 0000000..0553988
--- /dev/null
+++ b/progs/vpglsl/func.glsl
@@ -0,0 +1,33 @@
+#version 120
+const int KernelSize = 16;
+uniform float KernelValue1f[KernelSize];
+
+
+float add_two(float a, float b)
+{
+    if (a > b)
+        return a - b;
+    else
+        return a + b;
+}
+
+vec4 func(vec4 x)
+{
+    int i;
+    vec4 tmp = gl_Color;
+    vec4 sum = x;
+
+    for (i = 0; i < KernelSize; ++i) {
+        sum = vec4( add_two(sum.x, KernelValue1f[i]) );
+    }
+    return sum;
+}
+
+void main(void)
+{
+    vec4 sum = vec4(0.0);
+
+    sum = func(sum);
+    gl_Position = gl_Vertex;
+    gl_FrontColor = sum;
+}
diff --git a/progs/vpglsl/func2.glsl b/progs/vpglsl/func2.glsl
new file mode 100644
index 0000000..df964ed
--- /dev/null
+++ b/progs/vpglsl/func2.glsl
@@ -0,0 +1,54 @@
+#version 120
+const int KernelSize = 16;
+uniform float KernelValue1f[KernelSize];
+
+
+float add_two(float a, float b)
+{
+    if (a > b)
+        return a - b;
+    else
+        return a + b;
+}
+
+vec4 myfunc(vec4 x, vec4 mult, vec4 c)
+{
+   if (x.x >= 0.5) {
+      return mult * c;
+   } else {
+      return mult + c;
+   }
+}
+
+vec4 func2(vec4 x)
+{
+    int i;
+    vec4 color = vec4(0);
+       for (i = 0; i < KernelSize; ++i) {
+           vec4 tmp = vec4(1./KernelSize);
+           color += myfunc(x, tmp, gl_Color);
+       }
+    return x * color;
+}
+
+vec4 func(vec4 x)
+{
+    int i;
+    vec4 tmp = gl_Color;
+    vec4 sum = x;
+
+    for (i = 0; i < KernelSize; ++i) {
+        sum = vec4( add_two(sum.x, KernelValue1f[i]) );
+    }
+    sum = func2(sum);
+    return sum;
+}
+
+void main(void)
+{
+    vec4 sum = vec4(0.0);
+
+    sum = func(sum);
+    gl_Position = gl_Vertex;
+    gl_FrontColor = sum;
+}
-- 
2.7.4