X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=vs.vert;h=dac2df9f5e8f1a009cb816eb56fd20b60effb02c;hp=0ba2fdc8032c848fd75938c9118c88c2c974f735;hb=8e9f58fec54a4c879035b214fd7411f6ff7b3a32;hpb=f420ba91b26aad7701f781bf371f47662a19f452

diff --git a/vs.vert b/vs.vert
index 0ba2fdc..dac2df9 100644
--- a/vs.vert
+++ b/vs.vert
@@ -2,6 +2,10 @@ attribute vec2 position;
 attribute vec2 texcoord;
 varying vec2 tc;
 
+// Will be overridden by compile_glsl_program() if needed.
+// (It cannot just be prepended, as #version must be before everything.)
+#define FLIP_ORIGIN 0
+
 void main()
 {
 	// The result of glOrtho(0.0, 1.0, 0.0, 1.0, 0.0, 1.0) is:
@@ -12,4 +16,7 @@ void main()
 	//   0.000  0.000  0.000  1.000
 	gl_Position = vec4(2.0 * position.x - 1.0, 2.0 * position.y - 1.0, -1.0, 1.0);
 	tc = texcoord;
+#if FLIP_ORIGIN
+	tc.y = 1.0f - tc.y;
+#endif
 }