1 files changed, 17 insertions, 0 deletions
diff --git a/src/demos/hdr/shaders/cg/shrink.cg b/src/demos/hdr/shaders/cg/shrink.cg
new file mode 100755
index 0000000..7e01947
--- /dev/null
+++ b/src/demos/hdr/shaders/cg/shrink.cg
@@ -0,0 +1,17 @@
+// downsample float image by half
+
+#include "hdr.cg"
+
+half4 main(fragin In,
+	   uniform samplerRECT sceneTex : TEXUNIT0
+           ) : COLOR
+{
+    // should calculate texcoords in vertex shader here:
+    half4 c;
+    c = texRECT(sceneTex, In.tex0.xy);
+    c = c + texRECT(sceneTex, In.tex0.xy + float2(1, 0));
+    c = c + texRECT(sceneTex, In.tex0.xy + float2(0, 1));
+    c = c + texRECT(sceneTex, In.tex0.xy + float2(1, 1));
+    c = c * 0.25;
+    return c;
+}