chromium/third_party/dawn/src/dawn/common/Constants.h

// Copyright 2017 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
//    contributors may be used to endorse or promote products derived from
//    this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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#ifndef SRC_DAWN_COMMON_CONSTANTS_H_
#define SRC_DAWN_COMMON_CONSTANTS_H_

#include <cstddef>
#include <cstdint>

namespace dawn {

static constexpr uint32_t kMaxBindGroups = …;
static constexpr uint32_t kMaxBindingsPerBindGroup = …;
static constexpr uint8_t kMaxVertexAttributes = …;
static constexpr uint8_t kMaxVertexBuffers = …;
static constexpr uint32_t kMaxVertexBufferArrayStride = …;
static constexpr uint32_t kMaxBindGroupsPlusVertexBuffers = …;
static constexpr uint32_t kNumStages = …;
static constexpr uint8_t kMaxColorAttachments = …;
static constexpr uint32_t kTextureBytesPerRowAlignment = …;
static constexpr uint32_t kQueryResolveAlignment = …;
static constexpr uint32_t kMaxInterStageShaderComponents = …;
static constexpr uint32_t kMaxInterStageShaderVariables = …;
static constexpr uint64_t kAssumedMaxBufferSize = …;  // Use 2 GB when the limit is unavailable

// Per stage maximum limits used to optimized Dawn internals.
static constexpr uint32_t kMaxSampledTexturesPerShaderStage = …;
static constexpr uint32_t kMaxSamplersPerShaderStage = …;
static constexpr uint32_t kMaxStorageBuffersPerShaderStage = …;
static constexpr uint32_t kMaxStorageTexturesPerShaderStage = …;
static constexpr uint32_t kMaxUniformBuffersPerShaderStage = …;

// Indirect command sizes
static constexpr uint64_t kDispatchIndirectSize = …;
static constexpr uint64_t kDrawIndirectSize = …;
static constexpr uint64_t kDrawIndexedIndirectSize = …;

// Non spec defined constants.
static constexpr float kLodMin = …;
static constexpr float kLodMax = …;

// Offset alignment for CopyB2B. Strictly speaking this alignment is required only
// on macOS, but we decide to do it on all platforms.
static constexpr uint64_t kCopyBufferToBufferOffsetAlignment = …;

// Metal has a maximum size of 32Kb for a counter set buffer. Each query is 8 bytes.
// So, the maximum nymber of queries is 32Kb / 8.
static constexpr uint32_t kMaxQueryCount = …;

// An external texture occupies multiple binding slots. These are the per-external-texture bindings
// needed.
static constexpr uint8_t kSampledTexturesPerExternalTexture = …;
static constexpr uint8_t kSamplersPerExternalTexture = …;
static constexpr uint8_t kUniformsPerExternalTexture = …;

static constexpr uint8_t kMaxPLSSlots = …;
static constexpr size_t kPLSSlotByteSize = …;
static constexpr uint8_t kMaxPLSSize = …;

// Wire buffer alignments.
static constexpr size_t kWireBufferAlignment = …;

// Timestamp query quantization mask to perform a granularity of ~0.1ms.
static constexpr uint32_t kTimestampQuantizationMask = …;

}  // namespace dawn

#endif  // SRC_DAWN_COMMON_CONSTANTS_H_