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// Copyright 2018 The SwiftShader Authors. All Rights Reserved.
//
// 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 VK_IMAGE_VIEW_HPP_
#define VK_IMAGE_VIEW_HPP_
#include "VkDebug.hpp"
#include "VkFormat.h"
#include "VkObject.hpp"
#include "VkImage.hpp"
#include <atomic>
namespace vk
{
class ImageView : public Object<ImageView, VkImageView>
{
public:
// Image usage:
// RAW: Use the base image as is
// SAMPLING: Image used for texture sampling
enum Usage { RAW, SAMPLING };
ImageView(const VkImageViewCreateInfo* pCreateInfo, void* mem);
~ImageView() = delete;
void destroy(const VkAllocationCallbacks* pAllocator);
static size_t ComputeRequiredAllocationSize(const VkImageViewCreateInfo* pCreateInfo);
void clear(const VkClearValue& clearValues, VkImageAspectFlags aspectMask, const VkRect2D& renderArea);
void clear(const VkClearValue& clearValue, VkImageAspectFlags aspectMask, const VkClearRect& renderArea);
void resolve(ImageView* resolveAttachment);
VkImageViewType getType() const { return viewType; }
Format getFormat(Usage usage = RAW) const;
int rowPitchBytes(VkImageAspectFlagBits aspect, uint32_t mipLevel, Usage usage = RAW) const;
int slicePitchBytes(VkImageAspectFlagBits aspect, uint32_t mipLevel, Usage usage = RAW) const;
int layerPitchBytes(VkImageAspectFlagBits aspect, Usage usage = RAW) const;
VkExtent3D getMipLevelExtent(uint32_t mipLevel) const;
int getSampleCount() const
{
switch (image->getSampleCountFlagBits())
{
case VK_SAMPLE_COUNT_1_BIT: return 1;
case VK_SAMPLE_COUNT_4_BIT: return 4;
default:
UNIMPLEMENTED("Sample count flags %d", image->getSampleCountFlagBits());
return 1;
}
}
void *getOffsetPointer(const VkOffset3D& offset, VkImageAspectFlagBits aspect, uint32_t mipLevel, uint32_t layer, Usage usage = RAW) const;
bool hasDepthAspect() const { return (subresourceRange.aspectMask & VK_IMAGE_ASPECT_DEPTH_BIT) != 0; }
bool hasStencilAspect() const { return (subresourceRange.aspectMask & VK_IMAGE_ASPECT_STENCIL_BIT) != 0; }
void prepareForSampling() const { image->prepareForSampling(subresourceRange); }
const VkComponentMapping &getComponentMapping() const { return components; }
const VkImageSubresourceRange &getSubresourceRange() const { return subresourceRange; }
size_t getImageSizeInBytes() const { return image->getMemoryRequirements().size; }
const uint32_t id = nextID++;
private:
static std::atomic<uint32_t> nextID;
friend class BufferView; // ImageView/BufferView share the ID space above.
bool imageTypesMatch(VkImageType imageType) const;
const Image* getImage(Usage usage) const;
Image *const image = nullptr;
const VkImageViewType viewType = VK_IMAGE_VIEW_TYPE_2D;
const Format format;
const VkComponentMapping components = {};
const VkImageSubresourceRange subresourceRange = {};
};
static inline ImageView* Cast(VkImageView object)
{
return reinterpret_cast<ImageView*>(object);
}
} // namespace vk
#endif // VK_IMAGE_VIEW_HPP_