Move everything into a separate futatabi/ subdir, for the upcoming merge with Nageru.

[nageru] / futatabi / chroma_subsample.vert

diff --git a/futatabi/chroma_subsample.vert b/futatabi/chroma_subsample.vert
new file mode 100644 (file)
index 0000000..81e1004
--- /dev/null
+++ b/futatabi/chroma_subsample.vert
@@ -0,0 +1,21 @@
+#version 450 core
+
+layout(location=0) in vec2 position;
+out vec2 tc0, tc1;
+uniform vec2 chroma_offset_0;
+uniform vec2 chroma_offset_1;
+
+void main()
+{
+       // The result of glOrtho(0.0, 1.0, 0.0, 1.0, 0.0, 1.0) is:
+       //
+       //   2.000  0.000  0.000 -1.000
+       //   0.000  2.000  0.000 -1.000
+       //   0.000  0.000 -2.000 -1.000
+       //   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);
+       vec2 flipped_tc = position;
+       tc0 = flipped_tc + chroma_offset_0;
+       tc1 = flipped_tc + chroma_offset_1;
+}
+