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/*
* Copyright 2011-2013 Blender Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
CCL_NAMESPACE_BEGIN
ccl_device_noinline void svm_node_tex_white_noise(KernelGlobals kg,
ccl_private ShaderData *sd,
ccl_private float *stack,
uint dimensions,
uint inputs_stack_offsets,
uint ouptuts_stack_offsets)
{
uint vector_stack_offset, w_stack_offset, value_stack_offset, color_stack_offset;
svm_unpack_node_uchar2(inputs_stack_offsets, &vector_stack_offset, &w_stack_offset);
svm_unpack_node_uchar2(ouptuts_stack_offsets, &value_stack_offset, &color_stack_offset);
float3 vector = stack_load_float3(stack, vector_stack_offset);
float w = stack_load_float(stack, w_stack_offset);
if (stack_valid(color_stack_offset)) {
float3 color;
switch (dimensions) {
case 1:
color = hash_float_to_float3(w);
break;
case 2:
color = hash_float2_to_float3(make_float2(vector.x, vector.y));
break;
case 3:
color = hash_float3_to_float3(vector);
break;
case 4:
color = hash_float4_to_float3(make_float4(vector.x, vector.y, vector.z, w));
break;
default:
color = make_float3(1.0f, 0.0f, 1.0f);
kernel_assert(0);
break;
}
stack_store_float3(stack, color_stack_offset, color);
}
if (stack_valid(value_stack_offset)) {
float value;
switch (dimensions) {
case 1:
value = hash_float_to_float(w);
break;
case 2:
value = hash_float2_to_float(make_float2(vector.x, vector.y));
break;
case 3:
value = hash_float3_to_float(vector);
break;
case 4:
value = hash_float4_to_float(make_float4(vector.x, vector.y, vector.z, w));
break;
default:
value = 0.0f;
kernel_assert(0);
break;
}
stack_store_float(stack, value_stack_offset, value);
}
}
CCL_NAMESPACE_END
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