| // 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 |
| // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #ifndef SRC_DAWN_COMMON_CONSTANTS_H_ |
| #define SRC_DAWN_COMMON_CONSTANTS_H_ |
| |
| #include <cstddef> |
| #include <cstdint> |
| |
| namespace dawn { |
| |
| static constexpr uint32_t kMaxBindGroups = 4u; |
| static constexpr uint32_t kMaxBindingsPerBindGroup = 1000u; |
| static constexpr uint8_t kMaxVertexAttributes = 30u; |
| static constexpr uint8_t kMaxVertexBuffers = 8u; |
| static constexpr uint32_t kMaxVertexBufferArrayStride = 2048u; |
| static constexpr uint32_t kMaxBindGroupsPlusVertexBuffers = 24u; |
| static constexpr uint32_t kNumStages = 3; |
| static constexpr uint8_t kMaxColorAttachments = 8u; |
| static constexpr uint32_t kTextureBytesPerRowAlignment = 256u; |
| static constexpr uint32_t kQueryResolveAlignment = 256u; |
| static constexpr uint32_t kMaxInterStageShaderComponents = 64u; |
| static constexpr uint32_t kMaxInterStageShaderVariables = 16u; |
| static constexpr uint64_t kAssumedMaxBufferSize = |
| 0x80000000u; // Use 2 GB when the limit is unavailable |
| |
| // Per stage maximum limits used to optimized Dawn internals. |
| static constexpr uint32_t kMaxSampledTexturesPerShaderStage = 16; |
| static constexpr uint32_t kMaxSamplersPerShaderStage = 16; |
| static constexpr uint32_t kMaxStorageBuffersPerShaderStage = 10; |
| static constexpr uint32_t kMaxStorageTexturesPerShaderStage = 8; |
| static constexpr uint32_t kMaxUniformBuffersPerShaderStage = 12; |
| |
| // Indirect command sizes |
| static constexpr uint64_t kDispatchIndirectSize = 3 * sizeof(uint32_t); |
| static constexpr uint64_t kDrawIndirectSize = 4 * sizeof(uint32_t); |
| static constexpr uint64_t kDrawIndexedIndirectSize = 5 * sizeof(uint32_t); |
| |
| // Non spec defined constants. |
| static constexpr float kLodMin = 0.0; |
| static constexpr float kLodMax = 1000.0; |
| |
| // 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 = 4u; |
| |
| // 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 = 4096; |
| |
| // An external texture occupies multiple binding slots. These are the per-external-texture bindings |
| // needed. |
| static constexpr uint8_t kSampledTexturesPerExternalTexture = 4u; |
| static constexpr uint8_t kSamplersPerExternalTexture = 1u; |
| static constexpr uint8_t kUniformsPerExternalTexture = 1u; |
| |
| static constexpr uint8_t kMaxPLSSlots = 4; |
| static constexpr size_t kPLSSlotByteSize = 4; |
| static constexpr uint8_t kMaxPLSSize = kMaxPLSSlots * kPLSSlotByteSize; |
| |
| // Wire buffer alignments. |
| static constexpr size_t kWireBufferAlignment = 8u; |
| |
| // Timestamp query quantization mask to perform a granularity of ~0.1ms. |
| static constexpr uint32_t kTimestampQuantizationMask = 0xFFFF0000; |
| |
| } // namespace dawn |
| |
| #endif // SRC_DAWN_COMMON_CONSTANTS_H_ |
