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// Copyright 2018 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 DAWNNATIVE_VULKAN_RENDERPASSCACHE_H_
#define DAWNNATIVE_VULKAN_RENDERPASSCACHE_H_
#include "common/vulkan_platform.h"
#include "common/Constants.h"
#include "dawn_native/dawn_platform.h"
#include <array>
#include <bitset>
#include <unordered_map>
namespace dawn_native { namespace vulkan {
class Device;
// This is a key to query the RenderPassCache, it can be sparse meaning that only the
// information for bits set in colorMask or hasDepthStencil need to be provided and the rest can
// be uninintialized.
struct RenderPassCacheQuery {
// Use these helpers to build the query, they make sure all relevant data is initialized and
// masks set.
void SetColor(uint32_t index, dawn::TextureFormat format, dawn::LoadOp loadOp);
void SetDepthStencil(dawn::TextureFormat format,
dawn::LoadOp depthLoadOp,
dawn::LoadOp stencilLoadOp);
std::bitset<kMaxColorAttachments> colorMask;
std::array<dawn::TextureFormat, kMaxColorAttachments> colorFormats;
std::array<dawn::LoadOp, kMaxColorAttachments> colorLoadOp;
bool hasDepthStencil = false;
dawn::TextureFormat depthStencilFormat;
dawn::LoadOp depthLoadOp;
dawn::LoadOp stencilLoadOp;
};
// Caches VkRenderPasses so that we don't create duplicate ones for every RenderPipeline or
// render pass.
// TODO(cwallez@chromium.org): Make it an LRU cache somehow?
class RenderPassCache {
public:
RenderPassCache(Device* device);
~RenderPassCache();
VkRenderPass GetRenderPass(const RenderPassCacheQuery& query);
private:
// Does the actual VkRenderPass creation on a cache miss.
VkRenderPass CreateRenderPassForQuery(const RenderPassCacheQuery& query) const;
// Implements the functors necessary for to use RenderPassCacheQueries as unordered_map
// keys.
struct CacheFuncs {
size_t operator()(const RenderPassCacheQuery& query) const;
bool operator()(const RenderPassCacheQuery& a, const RenderPassCacheQuery& b) const;
};
using Cache =
std::unordered_map<RenderPassCacheQuery, VkRenderPass, CacheFuncs, CacheFuncs>;
Device* mDevice = nullptr;
Cache mCache;
};
}} // namespace dawn_native::vulkan
#endif // DAWNNATIVE_VULKAN_RENDERPASSCACHE_H_