UploadBufferManager.h

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/*
 * Copyright 2022 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_UploadBufferManager_DEFINED
#define skgpu_graphite_UploadBufferManager_DEFINED
 
#include "include/core/SkRefCnt.h"
#include "src/gpu/BufferWriter.h"
#include "src/gpu/graphite/DrawTypes.h"
 
#include <string_view>
#include <tuple>
#include <vector>
 
namespace skgpu::graphite {
 
class Buffer;
class Caps;
class CommandBuffer;
class Recording;
class ResourceProvider;
 
class UploadBufferManager {
public:
    UploadBufferManager(ResourceProvider*, const Caps*);
    ~UploadBufferManager();
 
    std::tuple<TextureUploadWriter, BindBufferInfo> getTextureUploadWriter(
            size_t requiredBytes, size_t requiredAlignment);
 
    // Finalizes all buffers and transfers ownership of them to a Recording.
    void transferToRecording(Recording*);
    void transferToCommandBuffer(CommandBuffer*);
 
private:
    friend class DrawBufferManager; // to access makeBindInfo
    friend class StaticBufferManager; // to access makeBindInfo
 
 
    std::tuple<void*/*mappedPtr*/, BindBufferInfo> makeBindInfo(size_t requiredBytes,
                                                                size_t requiredAlignment,
                                                                std::string_view label);
 
    ResourceProvider* fResourceProvider;
 
    sk_sp<Buffer> fReusedBuffer;
    size_t fMinAlignment;
    size_t fReusedBufferOffset = 0;
 
    std::vector<sk_sp<Buffer>> fUsedBuffers;
};
 
}  // namespace skgpu::graphite
 
#endif  // skgpu_graphite_UploadBufferManager_DEFINED