VulkanDescriptorPool.h

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/*
* Copyright 2023 Google LLC
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
 
#ifndef skgpu_graphite_VulkanDescriptorPool_DEFINED
#define skgpu_graphite_VulkanDescriptorPool_DEFINED
 
#include "include/core/SkRefCnt.h"
 
#include "include/core/SkSpan.h"
#include "src/gpu/graphite/DescriptorData.h"
#include "src/gpu/graphite/vk/VulkanGraphiteUtilsPriv.h"
 
namespace skgpu::graphite {
 
class VulkanSharedContext;
 
class VulkanDescriptorPool : public SkRefCnt {
public:
    // Conservative upper bound of number of sets supported per pool.
    static constexpr int kMaxNumSets = 512;
    /**
     * Given a span of descriptor types and counts, a descriptor pool will be created which houses
     * enough of the descriptor types and quantities requested to allocate the maximum number of
     * sets possible (kMaxNumSets). Counts must be > 0.
    */
    static sk_sp<VulkanDescriptorPool> Make(const VulkanSharedContext*,
                                            SkSpan<DescriptorData>,
                                            VkDescriptorSetLayout);
 
    VkDescriptorPool descPool() { return fDescPool; }
 
    const VkDescriptorSetLayout* descSetLayout() {
        SkASSERT(fDescSetLayout != VK_NULL_HANDLE);
        return &fDescSetLayout;
    }
 
private:
    // Conservative overestimation of a maximum number of descriptors of any given type that can be
    // requested.
    static constexpr int kMaxNumDescriptors = 1024;
 
    VulkanDescriptorPool(const VulkanSharedContext*,
                         VkDescriptorPool,
                         VkDescriptorSetLayout);
    ~VulkanDescriptorPool() override;
 
    const VulkanSharedContext*       fSharedContext;
    VkDescriptorPool                 fDescPool;
    // The VulkanDescriptorPool has ownership of the VkDescSetLayout used to allocate sets from this
    // pool.
    VkDescriptorSetLayout            fDescSetLayout;
};
} // namespace skgpu::graphite
 
#endif // skgpu_graphite_VulkanDescriptorPool_DEFINED