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/*
* Copyright 2011-2016 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.
*/
#ifndef __DEVICE_SPLIT_KERNEL_H__
#define __DEVICE_SPLIT_KERNEL_H__
#include "device.h"
#include "buffers.h"
CCL_NAMESPACE_BEGIN
/* When allocate global memory in chunks. We may not be able to
* allocate exactly "CL_DEVICE_MAX_MEM_ALLOC_SIZE" bytes in chunks;
* Since some bytes may be needed for aligning chunks of memory;
* This is the amount of memory that we dedicate for that purpose.
*/
#define DATA_ALLOCATION_MEM_FACTOR 5000000 //5MB
/* Types used for split kernel */
class KernelDimensions {
public:
size_t global_size[2];
size_t local_size[2];
KernelDimensions(size_t global_size_[2], size_t local_size_[2])
{
memcpy(global_size, global_size_, sizeof(global_size));
memcpy(local_size, local_size_, sizeof(local_size));
}
};
class SplitKernelFunction {
public:
virtual ~SplitKernelFunction() {}
/* enqueue the kernel, returns false if there is an error */
virtual bool enqueue(const KernelDimensions& dim, device_memory& kg, device_memory& data) = 0;
};
class DeviceSplitKernel {
private:
Device *device;
SplitKernelFunction *kernel_path_init;
SplitKernelFunction *kernel_scene_intersect;
SplitKernelFunction *kernel_lamp_emission;
SplitKernelFunction *kernel_queue_enqueue;
SplitKernelFunction *kernel_background_buffer_update;
SplitKernelFunction *kernel_shader_eval;
SplitKernelFunction *kernel_holdout_emission_blurring_pathtermination_ao;
SplitKernelFunction *kernel_direct_lighting;
SplitKernelFunction *kernel_shadow_blocked;
SplitKernelFunction *kernel_next_iteration_setup;
/* Global memory variables [porting]; These memory is used for
* co-operation between different kernels; Data written by one
* kernel will be available to another kernel via this global
* memory.
*/
device_memory split_data;
device_vector<uchar> ray_state;
device_memory queue_index; /* Array of size num_queues * sizeof(int) that tracks the size of each queue. */
/* Flag to make sceneintersect and lampemission kernel use queues. */
device_memory use_queues_flag;
/* Approximate time it takes to complete one sample */
double avg_time_per_sample;
/* Work pool with respect to each work group. */
device_memory work_pool_wgs;
/* clos_max value for which the kernels have been loaded currently. */
int current_max_closure;
/* Marked True in constructor and marked false at the end of path_trace(). */
bool first_tile;
public:
explicit DeviceSplitKernel(Device* device);
virtual ~DeviceSplitKernel();
bool load_kernels(const DeviceRequestedFeatures& requested_features);
bool path_trace(DeviceTask *task,
RenderTile& rtile,
device_memory& kgbuffer,
device_memory& kernel_data);
virtual size_t state_buffer_size(device_memory& kg, device_memory& data, size_t num_threads) = 0;
size_t max_elements_for_max_buffer_size(device_memory& kg, device_memory& data, size_t max_buffer_size);
virtual bool enqueue_split_kernel_data_init(const KernelDimensions& dim,
RenderTile& rtile,
int num_global_elements,
device_memory& kernel_globals,
device_memory& kernel_data_,
device_memory& split_data,
device_memory& ray_state,
device_memory& queue_index,
device_memory& use_queues_flag,
device_memory& work_pool_wgs) = 0;
virtual SplitKernelFunction* get_split_kernel_function(string kernel_name, const DeviceRequestedFeatures&) = 0;
virtual int2 split_kernel_local_size() = 0;
virtual int2 split_kernel_global_size(device_memory& kg, device_memory& data, DeviceTask *task) = 0;
};
CCL_NAMESPACE_END
#endif /* __DEVICE_SPLIT_KERNEL_H__ */
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