/* * Copyright 2022 Google LLC * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #ifndef skgpu_graphite_ComputeTypes_DEFINED #define skgpu_graphite_ComputeTypes_DEFINED #include "src/gpu/graphite/ResourceTypes.h" namespace skgpu::graphite { // The maximum number of shared resource binding slots permitted for ComputeSteps of a DispatchGroup constexpr int kMaxComputeDataFlowSlots = …; // The minimum element stride of an indirect dispatch argument array in bytes struct IndirectDispatchArgs { … }; constexpr size_t kIndirectDispatchArgumentSize = …; /** * Defines the space that a compute shader operates on. A problem space is logically divided into * abstract "work groups" (or "thread groups" in Metal/D3D12). * * The "work group count" or "global size" of the work group is a 3-dimensional number that defines * the size of the problem space. The user must provide the global size to define the number of * work groups that execute as part of a dispatch. * * The local size of a work group defines the number of parallel execution units that run in that * group. The local group size is defined in terms of the "raw number of threads" that run within * the group. * * A local group is further divided into fixed-sized SIMD units called "subgroups" (in Vulkan * terminology - these are referred to as "SIMD groups"/"threads" in Metal, "wavefronts" in OpenCL, * "warps" in CUDA). * * The local size is defined in 3 dimensions and must be determined based on hardware limitations, * which can be queried via Caps::maxComputeWorkgroupSize() (for each individual dimension) and * Caps::maxComputeInvocationsPerWorkgroup(). * * The WorkgroupSize type is used to represent both global size and local size. */ struct WorkgroupSize { … }; } // namespace skgpu::graphite #endif // skgpu_graphite_ComputeTypes_DEFINED
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