| // Copyright 2017 The Dawn Authors |
| // |
| // 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. |
| |
| #ifndef COMMON_CONSTANTS_H_ |
| #define COMMON_CONSTANTS_H_ |
| |
| #include <cstdint> |
| |
| static constexpr uint32_t kMaxBindGroups = 4u; |
| // TODO(cwallez@chromium.org): investigate bindgroup limits |
| static constexpr uint32_t kMaxBindingsPerGroup = 16u; |
| static constexpr uint32_t kMaxVertexAttributes = 16u; |
| // Vulkan has a standalone limit named maxVertexInputAttributeOffset (2047u at least) for vertex |
| // attribute offset. The limit might be meaningless because Vulkan has another limit named |
| // maxVertexInputBindingStride (2048u at least). We use maxVertexAttributeEnd (2048u) here to |
| // verify vertex attribute offset, which equals to maxOffset + smallest size of vertex format |
| // (char). We may use maxVertexInputBindingStride (maxVertexBufferStride below) instead to replace |
| // maxVertexAttributeEnd in future. |
| static constexpr uint32_t kMaxVertexAttributeEnd = 2048u; |
| static constexpr uint32_t kMaxVertexBuffers = 16u; |
| static constexpr uint32_t kMaxVertexBufferStride = 2048u; |
| static constexpr uint32_t kNumStages = 3; |
| static constexpr uint32_t kMaxColorAttachments = 4u; |
| static constexpr uint32_t kTextureBytesPerRowAlignment = 256u; |
| // Dynamic buffer offsets require offset to be divisible by 256 |
| static constexpr uint64_t kMinDynamicBufferOffsetAlignment = 256u; |
| // Max numbers of dynamic uniform buffers |
| static constexpr uint32_t kMaxDynamicUniformBufferCount = 8u; |
| // Max numbers of dynamic storage buffers |
| static constexpr uint32_t kMaxDynamicStorageBufferCount = 4u; |
| // Max numbers of dynamic buffers |
| static constexpr uint32_t kMaxDynamicBufferCount = |
| kMaxDynamicUniformBufferCount + kMaxDynamicStorageBufferCount; |
| // 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; |
| |
| // Max texture size constants |
| static constexpr uint32_t kMaxTextureSize = 8192u; |
| static constexpr uint32_t kMaxTexture2DArrayLayers = 256u; |
| static constexpr uint32_t kMaxTexture2DMipLevels = 14u; |
| static_assert(1 << (kMaxTexture2DMipLevels - 1) == kMaxTextureSize, |
| "kMaxTexture2DMipLevels and kMaxTextureSize size mismatch"); |
| |
| #endif // COMMON_CONSTANTS_H_ |
