Differential D2084 Diff 7153 intern/cycles/kernel/shaders/node_rgb_ramp.osl

Changeset View

Standalone View

intern/cycles/kernel/shaders/node_rgb_ramp.osl

	/*			/*
	* Copyright 2011-2013 Blender Foundation			* Copyright 2011-2013 Blender Foundation
	*			*
	* Licensed under the Apache License, Version 2.0 (the "License");			* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.			* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at			* You may obtain a copy of the License at
	*			*
	* http://www.apache.org/licenses/LICENSE-2.0			* http://www.apache.org/licenses/LICENSE-2.0
	*			*
	* Unless required by applicable law or agreed to in writing, software			* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,			* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.			* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and			* See the License for the specific language governing permissions and
	* limitations under the License.			* limitations under the License.
	*/			*/

	#include "stdosl.h"			#include "node_ramp_util.h"
	#include "oslutil.h"

	shader node_rgb_ramp(			shader node_rgb_ramp(
	color ramp_color[] = {0.0},			color ramp_color[] = {0.0},
	float ramp_alpha[] = {0.0},			float ramp_alpha[] = {0.0},
	int interpolate = 1,			int interpolate = 1,

	float Fac = 0.0,			float Fac = 0.0,
	output color Color = 0.0,			output color Color = 0.0,
	output float Alpha = 1.0)			output float Alpha = 1.0)
	{			{
	int table_size = arraylength(ramp_color);			Color = rgb_ramp_lookup(ramp_color, Fac, interpolate, 0);
	float f = clamp(Fac, 0.0, 1.0) * (table_size - 1);			Alpha = rgb_ramp_lookup(ramp_alpha, Fac, interpolate, 0);

	/* clamp int as well in case of NaN */
	int i = (int)f;
	if (i < 0) i = 0;
	if (i >= table_size) i = table_size - 1;
	float t = f - (float)i;

	Color = ramp_color[i];
	Alpha = ramp_alpha[i];

	if (interpolate && t > 0.0) {
	Color = (1.0 - t) * Color + t * ramp_color[i + 1];
	Alpha = (1.0 - t) * Alpha + t * ramp_alpha[i + 1];
	}
	}			}