Working scroll

2020-05-10 21:03:10 +02:00
parent 1e45a78b39
commit c3a71ed4e6
5 changed files with 148 additions and 20 deletions
@@ -1,11 +1,17 @@
 #version 130

+uniform sampler2D qt_Texture0;
 attribute vec2 qt_Vertex;
 attribute vec2 qt_MultiTexCoord0;
 varying vec2 qt_TexCoord0;
+uniform vec2 viewport;
+uniform vec2 offset;

 void main(void)
 {
+    vec2 texSize = vec2(textureSize(qt_Texture0, 0));
+    vec2 scale = viewport / texSize;
+    vec2 offsetRel = offset / texSize;
    gl_Position = vec4(qt_Vertex, 0.0, 1.0);
-    qt_TexCoord0 = qt_MultiTexCoord0;
+    qt_TexCoord0 = qt_MultiTexCoord0 * scale + offsetRel;
 }