575 lines
20 KiB
C++
575 lines
20 KiB
C++
// Copyright (c) Wojciech Figat. All rights reserved.
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#pragma once
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#include "Engine/Graphics/GPUResource.h"
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#include "GPUTextureDescription.h"
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class GPUContext;
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class GPUTask;
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class TextureMipData;
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class TextureData;
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template<typename T>
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class DataContainer;
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typedef DataContainer<byte> BytesContainer;
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class Task;
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/// <summary>
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/// Defines a view for the <see cref="GPUTexture"/> surface, full resource or any of the sub-parts. Can be used to define a single subresource of the texture, volume texture or texture array. Used to render to the texture and/or use textures in the shaders.
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/// </summary>
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API_CLASS(Sealed, NoSpawn) class FLAXENGINE_API GPUTextureView : public GPUResourceView
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{
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DECLARE_SCRIPTING_TYPE_NO_SPAWN(GPUTextureView);
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protected:
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PixelFormat _format = PixelFormat::Unknown;
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MSAALevel _msaa = MSAALevel::None;
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GPUTextureView()
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: GPUResourceView(SpawnParams(Guid::New(), TypeInitializer))
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{
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}
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FORCE_INLINE void Init(GPUResource* parent, PixelFormat format, MSAALevel msaa)
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{
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_parent = parent;
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_format = format;
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_msaa = msaa;
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if (parent)
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LastRenderTime = &parent->LastRenderTime;
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}
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public:
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/// <summary>
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/// Gets the view format.
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/// </summary>
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API_PROPERTY() FORCE_INLINE PixelFormat GetFormat() const
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{
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return _format;
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}
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/// <summary>
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/// Gets view MSAA level.
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/// </summary>
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API_PROPERTY() FORCE_INLINE MSAALevel GetMSAA() const
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{
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return _msaa;
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}
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};
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/// <summary>
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/// The GPU texture resource object. This class is able to create 2D/3D textures, volume textures and render targets.
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/// </summary>
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API_CLASS(Sealed) class FLAXENGINE_API GPUTexture : public GPUResource
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{
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DECLARE_SCRIPTING_TYPE_NO_SPAWN(GPUTexture);
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static GPUTexture* Spawn(const SpawnParams& params);
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static GPUTexture* New();
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protected:
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int32 _residentMipLevels;
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bool _sRGB, _isBlockCompressed;
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GPUTextureDescription _desc;
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GPUTexture();
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public:
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/// <summary>
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/// Gets a value indicating whether this texture has any resided mip (data already uploaded to the GPU).
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/// </summary>
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API_PROPERTY() FORCE_INLINE bool HasResidentMip() const
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{
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return _residentMipLevels != 0;
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}
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/// <summary>
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/// Gets a value indicating whether this texture has been allocated.
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/// </summary>
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API_PROPERTY() FORCE_INLINE bool IsAllocated() const
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{
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return _desc.MipLevels > 0;
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}
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/// <summary>
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/// Gets texture width (in texels).
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/// </summary>
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API_PROPERTY() FORCE_INLINE int32 Width() const
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{
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return _desc.Width;
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}
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/// <summary>
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/// Gets texture height (in texels).
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/// </summary>
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API_PROPERTY() FORCE_INLINE int32 Height() const
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{
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return _desc.Height;
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}
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/// <summary>
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/// Gets texture depth (in texels).
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/// </summary>
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API_PROPERTY() FORCE_INLINE int32 Depth() const
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{
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return _desc.Depth;
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}
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/// <summary>
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/// Gets number of textures in the array.
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/// </summary>
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API_PROPERTY() FORCE_INLINE int32 ArraySize() const
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{
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return _desc.ArraySize;
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}
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/// <summary>
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/// Gets multi-sampling parameters for the texture.
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/// </summary>
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API_PROPERTY() FORCE_INLINE MSAALevel MultiSampleLevel() const
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{
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return _desc.MultiSampleLevel;
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}
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/// <summary>
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/// Gets number of mipmap levels in the texture.
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/// </summary>
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API_PROPERTY() FORCE_INLINE int32 MipLevels() const
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{
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return _desc.MipLevels;
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}
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/// <summary>
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/// Gets the number of resident mipmap levels in the texture (already uploaded to the GPU).
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/// </summary>
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API_PROPERTY() FORCE_INLINE int32 ResidentMipLevels() const
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{
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return _residentMipLevels;
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}
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/// <summary>
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/// Gets the index of the highest resident mip map (may be equal to MipLevels if no mip has been uploaded). Note: mip=0 is the highest (top quality).
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/// </summary>
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API_PROPERTY() FORCE_INLINE int32 HighestResidentMipIndex() const
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{
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return MipLevels() - ResidentMipLevels();
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}
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/// <summary>
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/// Gets texture data format.
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/// </summary>
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API_PROPERTY() FORCE_INLINE PixelFormat Format() const
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{
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return _desc.Format;
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}
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/// <summary>
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/// Gets flags of the texture.
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/// </summary>
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API_PROPERTY() FORCE_INLINE GPUTextureFlags Flags() const
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{
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return _desc.Flags;
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}
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/// <summary>
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/// Gets texture dimensions.
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/// </summary>
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API_PROPERTY() FORCE_INLINE TextureDimensions Dimensions() const
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{
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return _desc.Dimensions;
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}
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/// <summary>
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/// Gets texture description structure.
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/// </summary>
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API_PROPERTY() FORCE_INLINE const GPUTextureDescription& GetDescription() const
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{
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return _desc;
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}
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public:
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/// <summary>
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/// Gets a value indicating whether this texture is a render target.
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/// </summary>
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FORCE_INLINE bool IsRenderTarget() const
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{
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return _desc.IsRenderTarget();
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}
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/// <summary>
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/// Gets a value indicating whether this texture is a shader resource.
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/// </summary>
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FORCE_INLINE bool IsShaderResource() const
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{
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return _desc.IsShaderResource();
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}
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/// <summary>
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/// Gets a value indicating whether this texture is a depth stencil.
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/// </summary>
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FORCE_INLINE bool IsDepthStencil() const
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{
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return _desc.IsDepthStencil();
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}
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/// <summary>
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/// Gets a value indicating whether this texture is a unordered access.
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/// </summary>
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FORCE_INLINE bool IsUnorderedAccess() const
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{
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return _desc.IsUnorderedAccess();
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}
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/// <summary>
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/// Gets a value indicating whether this instance has per mip level views.
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/// </summary>
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FORCE_INLINE bool HasPerMipViews() const
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{
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return _desc.HasPerMipViews();
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}
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/// <summary>
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/// Gets a value indicating whether this instance has per slice views.
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/// </summary>
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FORCE_INLINE bool HasPerSliceViews() const
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{
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return _desc.HasPerSliceViews();
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}
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/// <summary>
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/// Gets a value indicating whether this instance is a multi sample texture.
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/// </summary>
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FORCE_INLINE bool IsMultiSample() const
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{
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return _desc.IsMultiSample();
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}
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/// <summary>
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/// Gets a value indicating whether this instance is a cubemap texture.
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/// </summary>
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FORCE_INLINE bool IsCubeMap() const
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{
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return _desc.Dimensions == TextureDimensions::CubeTexture;
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}
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/// <summary>
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/// Gets a value indicating whether this instance is a volume texture.
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/// </summary>
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FORCE_INLINE bool IsVolume() const
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{
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return _desc.Dimensions == TextureDimensions::VolumeTexture;
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}
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/// <summary>
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/// Gets a value indicating whether this instance is an array texture.
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/// </summary>
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FORCE_INLINE bool IsArray() const
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{
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return _desc.ArraySize != 1;
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}
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/// <summary>
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/// Checks if texture contains sRGB colors data.
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/// </summary>
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FORCE_INLINE bool IsSRGB() const
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{
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return _sRGB;
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}
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/// <summary>
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/// Checks if texture is normal texture asset (not render target or unordered access or depth buffer or sth else).
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/// </summary>
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FORCE_INLINE bool IsRegularTexture() const
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{
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return _desc.Flags == GPUTextureFlags::ShaderResource;
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}
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/// <summary>
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/// Checks if texture is a staging buffer (supports direct CPU access).
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/// </summary>
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bool IsStaging() const;
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/// <summary>
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/// Gets a boolean indicating whether this <see cref="GPUTexture"/> is a using a block compress format (BC1, BC2, BC3, BC4, BC5, BC6H, BC7, etc.).
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/// </summary>
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FORCE_INLINE bool IsBlockCompressed() const
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{
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return _isBlockCompressed;
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}
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public:
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/// <summary>
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/// Gets the texture total size in pixels.
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/// </summary>
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API_PROPERTY() Float2 Size() const;
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/// <summary>
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/// Gets the texture total size in pixels (with depth).
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/// </summary>
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API_PROPERTY() Float3 Size3() const;
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/// <summary>
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/// Returns true if texture has size that is power of two.
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/// </summary>
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/// <returns>True if texture has size that is power of two.</returns>
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API_PROPERTY() bool IsPowerOfTwo() const;
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/// <summary>
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/// Gets the texture mip map dimensions.
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/// </summary>
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/// <param name="mipLevelIndex">Mip level index (zero-based where 0 is top texture surface).</param>
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/// <param name="mipWidth">The calculated mip level width (in pixels).</param>
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/// <param name="mipHeight">The calculated mip level height (in pixels).</param>
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API_FUNCTION() void GetMipSize(int32 mipLevelIndex, API_PARAM(Out) int32& mipWidth, API_PARAM(Out) int32& mipHeight) const;
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/// <summary>
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/// Gets the texture mip map dimensions.
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/// </summary>
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/// <param name="mipLevelIndex">Mip level index (zero-based where 0 is top texture surface).</param>
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/// <param name="mipWidth">The calculated mip level width (in pixels).</param>
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/// <param name="mipHeight">The calculated mip level height (in pixels).</param>
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/// <param name="mipDepth">The calculated mip level depth (in pixels).</param>
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API_FUNCTION() void GetMipSize(int32 mipLevelIndex, API_PARAM(Out) int32& mipWidth, API_PARAM(Out) int32& mipHeight, API_PARAM(Out) int32& mipDepth) const;
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/// <summary>
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/// Gets current texture size (uploaded to the GPU and in use).
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/// </summary>
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/// <param name="width">The current width (in pixels).</param>
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/// <param name="height">The current height (in pixels).</param>
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void GetResidentSize(int32& width, int32& height) const;
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/// <summary>
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/// Gets current texture size (uploaded to the GPU and in use).
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/// </summary>
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/// <param name="width">The current width (in pixels).</param>
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/// <param name="height">The current height (in pixels).</param>
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/// <param name="depth">The current depth (in pixels).</param>
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void GetResidentSize(int32& width, int32& height, int32& depth) const;
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public:
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/// <summary>
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/// Calculates mip map row pitch (in bytes).
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/// </summary>
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/// <param name="mipIndex">Index of the mip.</param>
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/// <returns>Row pitch.</returns>
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uint32 RowPitch(int32 mipIndex = 0) const;
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/// <summary>
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/// Calculates mip map slice pitch (in bytes).
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/// </summary>
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/// <param name="mipIndex">Index of the mip.</param>
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/// <returns>Slice pitch.</returns>
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uint32 SlicePitch(int32 mipIndex = 0) const;
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/// <summary>
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/// Computes row and slice pitch of the mip map.
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/// </summary>
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/// <param name="mipIndex">Index of the mip.</param>
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/// <param name="rowPitch">The row pitch.</param>
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/// <param name="slicePitch">The slice pitch.</param>
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void ComputePitch(int32 mipIndex, uint32& rowPitch, uint32& slicePitch) const;
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/// <summary>
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/// Calculates the size of a particular mip.
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/// </summary>
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/// <param name="size">The size.</param>
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/// <param name="mipLevel">The mip level.</param>
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/// <returns>Mip size.</returns>
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int32 CalculateMipSize(int32 size, int32 mipLevel) const;
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public:
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int32 ComputeSubresourceSize(int32 subresource, int32 rowAlign, int32 sliceAlign) const;
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int32 ComputeBufferOffset(int32 subresource, int32 rowAlign, int32 sliceAlign) const;
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int32 ComputeBufferTotalSize(int32 rowAlign, int32 sliceAlign) const;
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int32 ComputeSlicePitch(int32 mipLevel, int32 rowAlign) const;
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int32 ComputeRowPitch(int32 mipLevel, int32 rowAlign) const;
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public:
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/// <summary>
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/// Gets the view to the first surface (only for 2D textures).
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/// </summary>
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/// <returns>The view to the main texture surface.</returns>
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API_FUNCTION() FORCE_INLINE GPUTextureView* View() const
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{
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return View(0);
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}
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/// <summary>
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/// Gets the view to the surface at index in an array.
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/// </summary>
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/// <remarks>
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/// To use per depth/array slice view you need to specify the <see cref="GPUTextureFlags.PerSliceViews"/> when creating the resource.
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/// </remarks>
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/// <param name="arrayOrDepthIndex">The index of the surface in an array (or depth slice index).</param>
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/// <returns>The view to the surface at index in an array.</returns>
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API_FUNCTION() virtual GPUTextureView* View(int32 arrayOrDepthIndex) const = 0;
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/// <summary>
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/// Gets the view to the mip map surface at index in an array.
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/// </summary>
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/// <remarks>
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/// To use per mip map view you need to specify the <see cref="GPUTextureFlags.PerMipViews"/> when creating the resource.
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/// </remarks>
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/// <param name="arrayOrDepthIndex">The index of the surface in an array (or depth slice index).</param>
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/// <param name="mipMapIndex">Index of the mip level.</param>
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/// <returns>The view to the surface at index in an array.</returns>
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API_FUNCTION() virtual GPUTextureView* View(int32 arrayOrDepthIndex, int32 mipMapIndex) const = 0;
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/// <summary>
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/// Gets the view to the array of surfaces
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/// </summary>
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/// <remarks>
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/// To use array texture view you need to create render target as an array.
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/// </remarks>
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/// <returns>The view to the array of surfaces.</returns>
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API_FUNCTION() virtual GPUTextureView* ViewArray() const = 0;
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/// <summary>
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/// Gets the view to the volume texture (3D).
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/// </summary>
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/// <remarks>
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/// To use volume texture view you need to create render target as a volume resource (3D texture with Depth > 1).
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/// </remarks>
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/// <returns>The view to the volume texture.</returns>
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API_FUNCTION() virtual GPUTextureView* ViewVolume() const = 0;
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/// <summary>
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/// Gets the view to the texture as read-only depth/stencil buffer. Valid only if graphics device supports it and the texture uses depth/stencil.
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/// </summary>
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/// <returns>The view to the depth-stencil resource descriptor as read-only depth.</returns>
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API_FUNCTION() virtual GPUTextureView* ViewReadOnlyDepth() const = 0;
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/// <summary>
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/// Implicit conversion to the first surface (only for 2D textures).
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/// </summary>
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/// <returns>The view to the main texture surface.</returns>
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FORCE_INLINE operator GPUTextureView*() const
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{
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return View(0);
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}
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public:
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/// <summary>
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/// Initializes a texture resource (allocates the GPU memory and performs the resource setup).
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/// </summary>
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/// <param name="desc">The texture description.</param>
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/// <returns>True if cannot create texture, otherwise false.</returns>
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API_FUNCTION() bool Init(API_PARAM(Ref) const GPUTextureDescription& desc);
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/// <summary>
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/// Creates new staging readback texture with the same dimensions and properties as a source texture (but without a data transferred; warning: caller must delete object).
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/// </summary>
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/// <returns>The staging readback texture.</returns>
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GPUTexture* ToStagingReadback() const;
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/// <summary>
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/// Creates new staging upload texture with the same dimensions and properties as a source texture (but without a data transferred; warning: caller must delete object).
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/// </summary>
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/// <returns>The staging upload texture.</returns>
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GPUTexture* ToStagingUpload() const;
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/// <summary>
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/// Resizes the texture. It must be created first.
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/// </summary>
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/// <param name="width">The width.</param>
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/// <param name="height">The height.</param>
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/// <param name="format">The new texture format. Use Unknown to remain texture format unchanged.</param>
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/// <returns>True if fails, otherwise false.</returns>
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API_FUNCTION() bool Resize(int32 width, int32 height, PixelFormat format = PixelFormat::Unknown)
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{
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const auto depth = IsAllocated() ? Depth() : 1;
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return Resize(width, height, depth, format);
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}
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/// <summary>
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/// Resizes the texture. It must be created first.
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/// </summary>
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/// <param name="width">The width.</param>
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/// <param name="height">The height.</param>
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/// <param name="depth">The depth.</param>
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/// <param name="format">The new texture format. Use Unknown to remain texture format unchanged.</param>
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/// <returns>True if fails, otherwise false.</returns>
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API_FUNCTION() bool Resize(int32 width, int32 height, int32 depth, PixelFormat format = PixelFormat::Unknown);
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public:
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/// <summary>
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/// Gets the native pointer to the underlying resource. It's a low-level platform-specific handle.
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/// </summary>
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/// <returns>The pointer.</returns>
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API_PROPERTY() virtual void* GetNativePtr() const = 0;
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/// <summary>
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/// Uploads mip map data to the GPU. Creates async GPU task.
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/// </summary>
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/// <param name="data">Data to upload, it must match texture dimensions. It must be valid for the next couple of frames due to GPU async task latency or use data copy.</param>
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/// <param name="mipIndex">Mip level index.</param>
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/// <param name="copyData">If true, the data will be copied to the async execution task instead of using the input pointer provided.</param>
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/// <returns>Created async task or null if cannot.</returns>
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GPUTask* UploadMipMapAsync(const BytesContainer& data, int32 mipIndex, bool copyData = false);
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/// <summary>
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/// Uploads mip map data to the GPU. Creates async GPU task.
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/// </summary>
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/// <param name="data">Data to upload, it must match texture dimensions. It must be valid for the next couple of frames due to GPU async task latency or use data copy.</param>
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/// <param name="mipIndex">Mip level index.</param>
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/// <param name="rowPitch">The data row pitch.</param>
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/// <param name="slicePitch">The data slice pitch.</param>
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/// <param name="copyData">If true, the data will be copied to the async execution task instead of using the input pointer provided.</param>
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/// <returns>Created async task or null if cannot.</returns>
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GPUTask* UploadMipMapAsync(const BytesContainer& data, int32 mipIndex, int32 rowPitch, int32 slicePitch, bool copyData = false);
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/// <summary>
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/// Uploads texture data to the GPU. Actual data copy to the GPU memory is performed via async task.
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/// </summary>
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/// <param name="data">Data to upload, it must match texture dimensions. It must be valid for the next couple of frames due to GPU async task latency or use data copy.</param>
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/// <param name="copyData">If true, the data will be copied to the async execution task instead of using the input pointer provided.</param>
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/// <returns>True if cannot upload data, otherwise false.</returns>
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API_FUNCTION() bool UploadData(TextureData& data, bool copyData = false);
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/// <summary>
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/// Downloads the texture data to be accessible from CPU. For frequent access, use staging textures, otherwise current thread will be stalled to wait for the GPU frame to copy data into staging buffer.
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/// </summary>
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/// <param name="result">The destination texture data container.</param>
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/// <returns>True if cannot download data, otherwise false.</returns>
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API_FUNCTION() bool DownloadData(TextureData& result);
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/// <summary>
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/// Creates GPU async task that will gather texture data from the GPU.
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/// </summary>
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/// <param name="result">The result data.</param>
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/// <returns>Download data task (not started yet).</returns>
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Task* DownloadDataAsync(TextureData& result);
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/// <summary>
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/// Gets texture mipmap data (raw bytes). Can be used only with textures created with Staging flag.
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/// </summary>
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/// <param name="arrayIndex">Array slice index.</param>
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/// <param name="mipMapIndex">Mip map index.</param>
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/// <param name="data">Output mip data.</param>
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/// <param name="mipRowPitch">Output mip data row pitch to use. Use 0 to use the pitch from the internal GPU storage.</param>
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/// <returns>True if failed, otherwise false.</returns>
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virtual bool GetData(int32 arrayIndex, int32 mipMapIndex, TextureMipData& data, uint32 mipRowPitch = 0) = 0;
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/// <summary>
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/// Sets the number of resident mipmap levels in the texture (already uploaded to the GPU).
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/// </summary>
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API_PROPERTY() void SetResidentMipLevels(int32 count);
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/// <summary>
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/// Event called when texture residency gets changed. Texture Mip gets loaded into GPU memory and is ready to use.
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/// </summary>
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Delegate<GPUTexture*> ResidentMipsChanged;
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protected:
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virtual bool OnInit() = 0;
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uint64 calculateMemoryUsage() const;
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virtual void OnResidentMipsChanged() = 0;
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public:
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// [GPUResource]
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String ToString() const override;
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GPUResourceType GetResourceType() const final override;
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protected:
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// [GPUResource]
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void OnReleaseGPU() override;
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};
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