First version OpenGL drawing

image.frag

@@ -0,0 +1,13 @@
+#version 130
+
+uniform sampler2D qt_Texture0;
+varying vec2 qt_TexCoord0;
+uniform vec2 scale;
+
+void main(void)
+{
+    float c = texture2D(qt_Texture0, qt_TexCoord0).r;
+    c = c*scale.x + scale.y;
+    float color = pow(c, 0.4545);
+    gl_FragColor = vec4(color, color, color, 1.0);
+}