forked from bartvdbraak/blender
7808360c5f
MSVC 2008 ignores alignement attribute when assigning from unaligned float4 vector, returned from other function. Now Cycles uses unaligned loads instead of casts for win32 in x86 mode.
91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/*
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* Copyright 2011-2013 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License
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*/
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CCL_NAMESPACE_BEGIN
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ccl_device float4 film_map(KernelGlobals *kg, float4 irradiance, float scale)
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{
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float exposure = kernel_data.film.exposure;
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float4 result = irradiance*scale;
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/* conversion to srgb */
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result.x = color_scene_linear_to_srgb(result.x*exposure);
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result.y = color_scene_linear_to_srgb(result.y*exposure);
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result.z = color_scene_linear_to_srgb(result.z*exposure);
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/* clamp since alpha might be > 1.0 due to russian roulette */
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result.w = clamp(result.w, 0.0f, 1.0f);
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return result;
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}
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ccl_device uchar4 film_float_to_byte(float4 color)
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{
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uchar4 result;
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/* simple float to byte conversion */
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result.x = (uchar)clamp(color.x*255.0f, 0.0f, 255.0f);
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result.y = (uchar)clamp(color.y*255.0f, 0.0f, 255.0f);
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result.z = (uchar)clamp(color.z*255.0f, 0.0f, 255.0f);
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result.w = (uchar)clamp(color.w*255.0f, 0.0f, 255.0f);
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return result;
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}
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ccl_device void kernel_film_convert_to_byte(KernelGlobals *kg,
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ccl_global uchar4 *rgba, ccl_global float *buffer,
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float sample_scale, int x, int y, int offset, int stride)
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{
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/* buffer offset */
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int index = offset + x + y*stride;
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rgba += index;
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buffer += index*kernel_data.film.pass_stride;
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/* map colors */
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float4 irradiance = *((ccl_global float4*)buffer);
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float4 float_result = film_map(kg, irradiance, sample_scale);
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uchar4 byte_result = film_float_to_byte(float_result);
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*rgba = byte_result;
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}
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ccl_device void kernel_film_convert_to_half_float(KernelGlobals *kg,
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ccl_global uchar4 *rgba, ccl_global float *buffer,
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float sample_scale, int x, int y, int offset, int stride)
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{
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/* buffer offset */
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int index = offset + x + y*stride;
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ccl_global float4 *in = (ccl_global float4*)(buffer + index*kernel_data.film.pass_stride);
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ccl_global half *out = (ccl_global half*)rgba + index*4;
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float exposure = kernel_data.film.exposure;
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float4 rgba_in = *in;
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if(exposure != 1.0f) {
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rgba_in.x *= exposure;
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rgba_in.y *= exposure;
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rgba_in.z *= exposure;
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}
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float4_store_half(out, rgba_in, sample_scale);
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}
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CCL_NAMESPACE_END
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