Working scale and zoom

2020-05-14 22:42:39 +02:00
parent c3a71ed4e6
commit 30c8f6557f
8 changed files with 161 additions and 17 deletions
@@ -3,11 +3,31 @@
 uniform sampler2D qt_Texture0;
 varying vec2 qt_TexCoord0;
 uniform vec2 scale;
-
+uniform float a;
+uniform int stretch;

 void main(void)
 {
    vec4 color = texture2D(qt_Texture0, qt_TexCoord0);
+
+    switch(stretch)
+    {
+    case 0:
+        break;
+    case 1:
+       color = sqrt(color);
+       break;
+    case 2:
+        color = pow(color, vec4(a));
+        break;
+    case 3:
+        color = log(a*color + 1.0) / log(vec4(a+1));
+        break;
+    case 4:
+        color = asinh(color / a) / asinh(1 / a);
+        break;
+    }
+
    color = color*scale.x + scale.y;
    //float color = pow(c, 0.4545);
    gl_FragColor = color;