/*
 * Copyright 2021 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_ResourceTypes_DEFINED
#define skgpu_graphite_ResourceTypes_DEFINED

#include "include/gpu/graphite/GraphiteTypes.h"
#include "src/core/SkEnumBitMask.h"

namespace skgpu::graphite {

/**
 * Is the Texture renderable or not
 */
enum class Renderable : bool {
    kNo = false,
    kYes = true,
};

enum class DepthStencilFlags : int {
    kNone = 0b000,
    kDepth = 0b001,
    kStencil = 0b010,
    kDepthStencil = kDepth | kStencil,
};
SK_MAKE_BITMASK_OPS(DepthStencilFlags);

/**
 * What a GPU buffer will be used for
 */
enum class BufferType {
    kVertex,
    kIndex,
    kXferCpuToGpu,
    kXferGpuToCpu,
    kUniform,
    kStorage,
};
static const int kBufferTypeCount = static_cast<int>(BufferType::kStorage) + 1;

/**
 * When creating the memory for a resource should we use a memory type that prioritizes the
 * effeciency of GPU reads even if it involves extra work to write CPU data to it. For example, we
 * would want this for buffers that we cache to read the same data many times on the GPU.
 */
enum class PrioritizeGpuReads : bool {
    kNo = false,
    kYes = true,
};

/**
 * Must the contents of the Resource be preserved af a render pass or can a more efficient
 * representation be chosen when supported by hardware.
 */
enum class Discardable : bool {
    kNo = false,
    kYes = true
};

enum class Ownership {
    kOwned,
    kWrapped,
};

/** Uniquely identifies the type of resource that is cached with a GraphiteResourceKey. */
using ResourceType = uint32_t;

/**
 * Can the resource be held by multiple users at the same time?
 * For example, stencil buffers, pipelines, etc.
 */
enum class Shareable : bool {
    kNo = false,
    kYes = true,
};

/**
 * This enum is used to notify the ResourceCache which type of ref just dropped to zero on a
 * Resource.
 */
enum class LastRemovedRef {
    kUsage,
    kCommandBuffer,
    kCache,
};

};  // namespace skgpu::graphite

#endif // skgpu_graphite_ResourceTypes_DEFINED