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/*
* Copyright 2021 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.
*/
#pragma once
#ifdef WITH_METAL
# include "device/kernel.h"
# include <Metal/Metal.h>
CCL_NAMESPACE_BEGIN
class MetalDevice;
enum {
METALRT_FUNC_DEFAULT_TRI,
METALRT_FUNC_DEFAULT_BOX,
METALRT_FUNC_SHADOW_TRI,
METALRT_FUNC_SHADOW_BOX,
METALRT_FUNC_LOCAL_TRI,
METALRT_FUNC_LOCAL_BOX,
METALRT_FUNC_CURVE_RIBBON,
METALRT_FUNC_CURVE_RIBBON_SHADOW,
METALRT_FUNC_CURVE_ALL,
METALRT_FUNC_CURVE_ALL_SHADOW,
METALRT_FUNC_POINT,
METALRT_FUNC_POINT_SHADOW,
METALRT_FUNC_NUM
};
enum { METALRT_TABLE_DEFAULT, METALRT_TABLE_SHADOW, METALRT_TABLE_LOCAL, METALRT_TABLE_NUM };
/* Pipeline State Object types */
enum {
/* A kernel that can be used with all scenes, supporting all features.
* It is slow to compile, but only needs to be compiled once and is then
* cached for future render sessions. This allows a render to get underway
* on the GPU quickly.
*/
PSO_GENERIC,
/* A kernel that is relatively quick to compile, but is specialized for the
* scene being rendered. It only contains the functionality and even baked in
* constants for values that means it needs to be recompiled whenever a
* dependent setting is changed. The render performance of this kernel is
* significantly faster though, and justifies the extra compile time.
*/
/* METAL_WIP: This isn't used and will require more changes to enable. */
PSO_SPECIALISED,
PSO_NUM
};
const char *kernel_type_as_string(int kernel_type);
struct MetalKernelPipeline {
void release()
{
if (pipeline) {
[pipeline release];
pipeline = nil;
if (@available(macOS 11.0, *)) {
for (int i = 0; i < METALRT_TABLE_NUM; i++) {
if (intersection_func_table[i]) {
[intersection_func_table[i] release];
intersection_func_table[i] = nil;
}
}
}
}
if (function) {
[function release];
function = nil;
}
if (@available(macOS 11.0, *)) {
for (int i = 0; i < METALRT_TABLE_NUM; i++) {
if (intersection_func_table[i]) {
[intersection_func_table[i] release];
}
}
}
}
bool loaded = false;
id<MTLFunction> function = nil;
id<MTLComputePipelineState> pipeline = nil;
API_AVAILABLE(macos(11.0))
id<MTLIntersectionFunctionTable> intersection_func_table[METALRT_TABLE_NUM] = {nil};
};
struct MetalKernelLoadDesc {
int pso_index = 0;
const char *function_name = nullptr;
int kernel_index = 0;
int threads_per_threadgroup = 0;
MTLFunctionConstantValues *constant_values = nullptr;
NSArray *linked_functions = nullptr;
struct IntersectorFunctions {
NSArray *defaults;
NSArray *shadow;
NSArray *local;
NSArray *operator[](int index) const
{
if (index == METALRT_TABLE_DEFAULT)
return defaults;
if (index == METALRT_TABLE_SHADOW)
return shadow;
return local;
}
} intersector_functions = {nullptr};
};
/* Metal kernel and associate occupancy information. */
class MetalDeviceKernel {
public:
~MetalDeviceKernel();
bool load(MetalDevice *device, MetalKernelLoadDesc const &desc, class MD5Hash const &md5);
void mark_loaded(int pso_index)
{
pso[pso_index].loaded = true;
}
int get_num_threads_per_block() const
{
return num_threads_per_block;
}
const MetalKernelPipeline &get_pso() const;
double load_duration = 0.0;
private:
MetalKernelPipeline pso[PSO_NUM];
int num_threads_per_block = 0;
};
/* Cache of Metal kernels for each DeviceKernel. */
class MetalDeviceKernels {
public:
bool load(MetalDevice *device, int kernel_type);
bool available(DeviceKernel kernel) const;
const MetalDeviceKernel &get(DeviceKernel kernel) const;
MetalDeviceKernel kernels_[DEVICE_KERNEL_NUM];
id<MTLFunction> rt_intersection_funcs[PSO_NUM][METALRT_FUNC_NUM] = {{nil}};
string loaded_md5[PSO_NUM];
};
CCL_NAMESPACE_END
#endif /* WITH_METAL */
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