1 files changed, 37 insertions, 0 deletions
diff --git a/src/demos/hdr/shaders/cg/tonemap.cg b/src/demos/hdr/shaders/cg/tonemap.cg
new file mode 100755
index 0000000..c3d218f
--- /dev/null
+++ b/src/demos/hdr/shaders/cg/tonemap.cg
@@ -0,0 +1,37 @@
+// Tone mapping pass
+
+#include "hdr.cg"
+
+half4 main(fragin In,
+           uniform samplerRECT sceneTex     : TEXUNIT0,
+           uniform samplerRECT blurTex      : TEXUNIT1,
+           uniform sampler1D   gammaTex     : TEXUNIT2,
+           uniform samplerRECT vignetteTex  : TEXUNIT3,
+           uniform float       blurAmount,
+           uniform float4      windowSize,
+           uniform float       exposure
+           ) : COLOR
+{
+    // sum original and blurred image
+    half3 c = lerp(texRECT(sceneTex, In.tex0.xy), texRECT_bilinear(blurTex, In.tex1.xy), blurAmount).xyz;
+
+    // exposure
+    c = c * half(exposure);
+
+    // vignette effect (makes brightness drop off with distance from center)
+//    vignette(c, In.wpos, windowSize.xy, windowSize.zw);
+    c = c * texRECT(vignetteTex, In.tex0.xy).rgb;
+
+    // gamma correction
+#if 0
+    // use math
+    c = pow(c, 1.0 / 2.2);
+#else
+    // use lut
+    c.r = h1tex1D(gammaTex, c.r);
+    c.g = h1tex1D(gammaTex, c.g);
+    c.b = h1tex1D(gammaTex, c.b);
+#endif
+
+    return half4(c, 1.0);
+}