b9ce231060
More information in this post: http://code.blender.org/ Thanks to all contributes for giving their permission!
125 lines
3.3 KiB
C
125 lines
3.3 KiB
C
/*
|
|
* 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
|
|
*/
|
|
|
|
/* Constant Globals */
|
|
|
|
CCL_NAMESPACE_BEGIN
|
|
|
|
/* On the CPU, we pass along the struct KernelGlobals to nearly everywhere in
|
|
* the kernel, to access constant data. These are all stored as "textures", but
|
|
* these are really just standard arrays. We can't use actually globals because
|
|
* multiple renders may be running inside the same process. */
|
|
|
|
#ifdef __KERNEL_CPU__
|
|
|
|
#ifdef __OSL__
|
|
struct OSLGlobals;
|
|
struct OSLThreadData;
|
|
struct OSLShadingSystem;
|
|
#endif
|
|
|
|
#define MAX_BYTE_IMAGES 512
|
|
#define MAX_FLOAT_IMAGES 5
|
|
|
|
typedef struct KernelGlobals {
|
|
texture_image_uchar4 texture_byte_images[MAX_BYTE_IMAGES];
|
|
texture_image_float4 texture_float_images[MAX_FLOAT_IMAGES];
|
|
|
|
#define KERNEL_TEX(type, ttype, name) ttype name;
|
|
#define KERNEL_IMAGE_TEX(type, ttype, name)
|
|
#include "kernel_textures.h"
|
|
|
|
KernelData __data;
|
|
|
|
#ifdef __OSL__
|
|
/* On the CPU, we also have the OSL globals here. Most data structures are shared
|
|
* with SVM, the difference is in the shaders and object/mesh attributes. */
|
|
OSLGlobals *osl;
|
|
OSLShadingSystem *osl_ss;
|
|
OSLThreadData *osl_tdata;
|
|
#endif
|
|
|
|
} KernelGlobals;
|
|
|
|
#endif
|
|
|
|
/* For CUDA, constant memory textures must be globals, so we can't put them
|
|
* into a struct. As a result we don't actually use this struct and use actual
|
|
* globals and simply pass along a NULL pointer everywhere, which we hope gets
|
|
* optimized out. */
|
|
|
|
#ifdef __KERNEL_CUDA__
|
|
|
|
__constant__ KernelData __data;
|
|
typedef struct KernelGlobals {} KernelGlobals;
|
|
|
|
#define KERNEL_TEX(type, ttype, name) ttype name;
|
|
#define KERNEL_IMAGE_TEX(type, ttype, name) ttype name;
|
|
#include "kernel_textures.h"
|
|
|
|
#endif
|
|
|
|
/* OpenCL */
|
|
|
|
#ifdef __KERNEL_OPENCL__
|
|
|
|
typedef struct KernelGlobals {
|
|
__constant KernelData *data;
|
|
|
|
#define KERNEL_TEX(type, ttype, name) \
|
|
__global type *name;
|
|
#include "kernel_textures.h"
|
|
} KernelGlobals;
|
|
|
|
#endif
|
|
|
|
/* Interpolated lookup table access */
|
|
|
|
__device float lookup_table_read(KernelGlobals *kg, float x, int offset, int size)
|
|
{
|
|
x = clamp(x, 0.0f, 1.0f)*(size-1);
|
|
|
|
int index = min(float_to_int(x), size-1);
|
|
int nindex = min(index+1, size-1);
|
|
float t = x - index;
|
|
|
|
float data0 = kernel_tex_fetch(__lookup_table, index + offset);
|
|
if(t == 0.0f)
|
|
return data0;
|
|
|
|
float data1 = kernel_tex_fetch(__lookup_table, nindex + offset);
|
|
return (1.0f - t)*data0 + t*data1;
|
|
}
|
|
|
|
__device float lookup_table_read_2D(KernelGlobals *kg, float x, float y, int offset, int xsize, int ysize)
|
|
{
|
|
y = clamp(y, 0.0f, 1.0f)*(ysize-1);
|
|
|
|
int index = min(float_to_int(y), ysize-1);
|
|
int nindex = min(index+1, ysize-1);
|
|
float t = y - index;
|
|
|
|
float data0 = lookup_table_read(kg, x, offset + xsize*index, xsize);
|
|
if(t == 0.0f)
|
|
return data0;
|
|
|
|
float data1 = lookup_table_read(kg, x, offset + xsize*nindex, xsize);
|
|
return (1.0f - t)*data0 + t*data1;
|
|
}
|
|
|
|
CCL_NAMESPACE_END
|
|
|