Cycles OSL: phong_ramp(N, exponent, colors[8]) closure added, which works like

a specular ramp shader. Note this is OSL only still, for experimenting.

Patch by Thomas.

1 files changed, 115 insertions, 0 deletions

diff --git a/intern/cycles/kernel/osl/bsdf_phong_ramp.cpp b/intern/cycles/kernel/osl/bsdf_phong_ramp.cpp
new file mode 100644
index 00000000000..fb144be7e50
--- /dev/null
+++ b/intern/cycles/kernel/osl/bsdf_phong_ramp.cpp
@@ -0,0 +1,115 @@
+/*
+ * Adapted from Open Shading Language with this license:
+ *
+ * Copyright (c) 2009-2010 Sony Pictures Imageworks Inc., et al.
+ * All Rights Reserved.
+ *
+ * Modifications Copyright 2011, Blender Foundation.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * * Neither the name of Sony Pictures Imageworks nor the names of its
+ *   contributors may be used to endorse or promote products derived from
+ *   this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <OpenImageIO/fmath.h>
+
+#include <OSL/genclosure.h>
+
+#include "osl_closures.h"
+
+#include "kernel_types.h"
+#include "closure/bsdf_phong_ramp.h"
+
+CCL_NAMESPACE_BEGIN
+
+using namespace OSL;
+
+class PhongRampClosure : public CBSDFClosure {
+public:
+	PhongRampClosure() : CBSDFClosure(LABEL_GLOSSY) {}
+	Color3 colors[8];
+	float3 fcolors[8];
+
+	size_t memsize() const { return sizeof(*this); }
+	const char *name() const { return "phong_ramp"; }
+
+	void setup()
+	{
+		sc.N = TO_FLOAT3(N);
+		m_shaderdata_flag = bsdf_phong_ramp_setup(&sc);
+
+		for(int i = 0; i < 8; i++)
+			fcolors[i] = TO_FLOAT3(colors[i]);
+	}
+
+	bool mergeable(const ClosurePrimitive *other) const
+	{
+		return false;
+	}
+
+	void blur(float roughness)
+	{
+		bsdf_phong_ramp_blur(&sc, roughness);
+	}
+
+	void print_on(std::ostream &out) const
+	{
+		out << name() << " ((" << sc.N[0] << ", " << sc.N[1] << ", " << sc.N[2] << "))";
+	}
+
+	float3 eval_reflect(const float3 &omega_out, const float3 &omega_in, float& pdf) const
+	{
+		return bsdf_phong_ramp_eval_reflect(&sc, fcolors, omega_out, omega_in, &pdf);
+	}
+
+	float3 eval_transmit(const float3 &omega_out, const float3 &omega_in, float& pdf) const
+	{
+		return bsdf_phong_ramp_eval_transmit(&sc, fcolors, omega_out, omega_in, &pdf);
+	}
+
+	int sample(const float3 &Ng,
+	           const float3 &omega_out, const float3 &domega_out_dx, const float3 &domega_out_dy,
+	           float randu, float randv,
+	           float3 &omega_in, float3 &domega_in_dx, float3 &domega_in_dy,
+	           float &pdf, float3 &eval) const
+	{
+		return bsdf_phong_ramp_sample(&sc, fcolors, Ng, omega_out, domega_out_dx, domega_out_dy,
+			randu, randv, &eval, &omega_in, &domega_in_dx, &domega_in_dy, &pdf);
+	}
+};
+
+ClosureParam *closure_bsdf_phong_ramp_params()
+{
+	static ClosureParam params[] = {
+		CLOSURE_VECTOR_PARAM(PhongRampClosure, N),
+		CLOSURE_FLOAT_PARAM(PhongRampClosure, sc.data0),
+		CLOSURE_COLOR_ARRAY_PARAM(PhongRampClosure, colors, 8),
+		CLOSURE_STRING_KEYPARAM("label"),
+	    CLOSURE_FINISH_PARAM(PhongRampClosure)
+	};
+	return params;
+}
+
+CLOSURE_PREPARE(closure_bsdf_phong_ramp_prepare, PhongRampClosure)
+
+CCL_NAMESPACE_END
+