1cb93a386Sopenharmony_ci// Copyright 2017 The Dawn Authors 2cb93a386Sopenharmony_ci// 3cb93a386Sopenharmony_ci// Licensed under the Apache License, Version 2.0 (the "License"); 4cb93a386Sopenharmony_ci// you may not use this file except in compliance with the License. 5cb93a386Sopenharmony_ci// You may obtain a copy of the License at 6cb93a386Sopenharmony_ci// 7cb93a386Sopenharmony_ci// http://www.apache.org/licenses/LICENSE-2.0 8cb93a386Sopenharmony_ci// 9cb93a386Sopenharmony_ci// Unless required by applicable law or agreed to in writing, software 10cb93a386Sopenharmony_ci// distributed under the License is distributed on an "AS IS" BASIS, 11cb93a386Sopenharmony_ci// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12cb93a386Sopenharmony_ci// See the License for the specific language governing permissions and 13cb93a386Sopenharmony_ci// limitations under the License. 14cb93a386Sopenharmony_ci 15cb93a386Sopenharmony_ci#ifndef COMMON_CONSTANTS_H_ 16cb93a386Sopenharmony_ci#define COMMON_CONSTANTS_H_ 17cb93a386Sopenharmony_ci 18cb93a386Sopenharmony_ci#include <cstdint> 19cb93a386Sopenharmony_ci 20cb93a386Sopenharmony_cistatic constexpr uint32_t kMaxBindGroups = 4u; 21cb93a386Sopenharmony_cistatic constexpr uint8_t kMaxVertexAttributes = 16u; 22cb93a386Sopenharmony_cistatic constexpr uint8_t kMaxVertexBuffers = 8u; 23cb93a386Sopenharmony_cistatic constexpr uint32_t kMaxVertexBufferArrayStride = 2048u; 24cb93a386Sopenharmony_cistatic constexpr uint32_t kNumStages = 3; 25cb93a386Sopenharmony_cistatic constexpr uint8_t kMaxColorAttachments = 8u; 26cb93a386Sopenharmony_cistatic constexpr uint32_t kTextureBytesPerRowAlignment = 256u; 27cb93a386Sopenharmony_cistatic constexpr uint32_t kMaxInterStageShaderComponents = 60u; 28cb93a386Sopenharmony_cistatic constexpr uint32_t kMaxInterStageShaderVariables = kMaxInterStageShaderComponents / 4; 29cb93a386Sopenharmony_ci 30cb93a386Sopenharmony_ci// Per stage limits 31cb93a386Sopenharmony_cistatic constexpr uint32_t kMaxSampledTexturesPerShaderStage = 16; 32cb93a386Sopenharmony_cistatic constexpr uint32_t kMaxSamplersPerShaderStage = 16; 33cb93a386Sopenharmony_cistatic constexpr uint32_t kMaxStorageBuffersPerShaderStage = 8; 34cb93a386Sopenharmony_cistatic constexpr uint32_t kMaxStorageTexturesPerShaderStage = 4; 35cb93a386Sopenharmony_cistatic constexpr uint32_t kMaxUniformBuffersPerShaderStage = 12; 36cb93a386Sopenharmony_ci 37cb93a386Sopenharmony_ci// Per pipeline layout limits 38cb93a386Sopenharmony_cistatic constexpr uint32_t kMaxDynamicUniformBuffersPerPipelineLayout = 8u; 39cb93a386Sopenharmony_cistatic constexpr uint32_t kMaxDynamicStorageBuffersPerPipelineLayout = 4u; 40cb93a386Sopenharmony_ci 41cb93a386Sopenharmony_ci// Indirect command sizes 42cb93a386Sopenharmony_cistatic constexpr uint64_t kDispatchIndirectSize = 3 * sizeof(uint32_t); 43cb93a386Sopenharmony_cistatic constexpr uint64_t kDrawIndirectSize = 4 * sizeof(uint32_t); 44cb93a386Sopenharmony_cistatic constexpr uint64_t kDrawIndexedIndirectSize = 5 * sizeof(uint32_t); 45cb93a386Sopenharmony_ci 46cb93a386Sopenharmony_ci// Non spec defined constants. 47cb93a386Sopenharmony_cistatic constexpr float kLodMin = 0.0; 48cb93a386Sopenharmony_cistatic constexpr float kLodMax = 1000.0; 49cb93a386Sopenharmony_ci 50cb93a386Sopenharmony_ci// Offset alignment for CopyB2B. Strictly speaking this alignment is required only 51cb93a386Sopenharmony_ci// on macOS, but we decide to do it on all platforms. 52cb93a386Sopenharmony_cistatic constexpr uint64_t kCopyBufferToBufferOffsetAlignment = 4u; 53cb93a386Sopenharmony_ci 54cb93a386Sopenharmony_ci// The maximum size of visibilityResultBuffer is 256KB on Metal, to fit the restriction, limit the 55cb93a386Sopenharmony_ci// maximum size of query set to 64KB. The size of a query is 8-bytes, the maximum query count is 64 56cb93a386Sopenharmony_ci// * 1024 / 8. 57cb93a386Sopenharmony_cistatic constexpr uint32_t kMaxQueryCount = 8192u; 58cb93a386Sopenharmony_ci 59cb93a386Sopenharmony_ci// An external texture occupies multiple binding slots. These are the per-external-texture bindings 60cb93a386Sopenharmony_ci// needed. 61cb93a386Sopenharmony_cistatic constexpr uint8_t kSampledTexturesPerExternalTexture = 3u; 62cb93a386Sopenharmony_cistatic constexpr uint8_t kSamplersPerExternalTexture = 1u; 63cb93a386Sopenharmony_cistatic constexpr uint8_t kUniformsPerExternalTexture = 1u; 64cb93a386Sopenharmony_ci 65cb93a386Sopenharmony_ci#endif // COMMON_CONSTANTS_H_ 66