1 files changed, 79 insertions, 0 deletions
diff --git a/intern/cycles/kernel/svm/svm_blend.h b/intern/cycles/kernel/svm/svm_blend.h
new file mode 100644
index 00000000000..b1be7b7f6bc
--- /dev/null
+++ b/intern/cycles/kernel/svm/svm_blend.h
@@ -0,0 +1,79 @@
+/*
+ * Copyright 2011, Blender Foundation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+CCL_NAMESPACE_BEGIN
+
+/* Blend */
+
+__device float svm_blend(float3 p, NodeBlendType type, NodeBlendAxis axis)
+{
+	float x, y;
+
+	if(axis == NODE_BLEND_VERTICAL) {
+		x= p.y;
+		y= p.x;
+	}
+	else {
+		x= p.x;
+		y= p.y;
+	}
+
+	if(type == NODE_BLEND_LINEAR) {
+		return (1.0f + x)/2.0f;
+	}
+	else if(type == NODE_BLEND_QUADRATIC) {
+		float r = fmaxf((1.0f + x)/2.0f, 0.0f);
+		return r*r;
+	}
+	else if(type == NODE_BLEND_EASING) {
+		float r = min(fmaxf((1.0f + x)/2.0f, 0.0f), 1.0f);
+		float t = r*r;
+		
+		return (3.0f*t - 2.0f*t*r);
+	}
+	else if(type == NODE_BLEND_DIAGONAL) {
+		return (2.0f + x + y)/4.0f;
+	}
+	else if(type == NODE_BLEND_RADIAL) {
+		return atan2(y, x)/(2.0f*M_PI_F) + 0.5f;
+	}
+	else {
+		float r = fmaxf(1.0f - sqrtf(x*x + y*y + p.z*p.z), 0.0f);
+
+		if(type == NODE_BLEND_QUADRATIC_SPHERE)
+			return r*r;
+		else if(type == NODE_BLEND_SPHERICAL)
+			return r;
+	}
+
+	return 0.0f;
+}
+
+__device void svm_node_tex_blend(ShaderData *sd, float *stack, uint4 node)
+{
+	float3 co = stack_load_float3(stack, node.z);
+	uint type, axis;
+
+	decode_node_uchar4(node.y, &type, &axis, NULL, NULL);
+
+	float f = svm_blend(co, (NodeBlendType)type, (NodeBlendAxis)axis);
+	stack_store_float(stack, node.w, f);
+}
+
+CCL_NAMESPACE_END
+