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UnrealEngineUWP/Engine/Source/Runtime/OpenGLDrv/Private/OpenGLTexture.cpp
Marcus Wassmer 11ff098ea0 Bind clear color to rendertargets at creation time. 
#codereview Rolando.caloca

[CL 2615534 by Marcus Wassmer in Main branch]
2015-07-09 15:11:37 -04:00

2174 lines
75 KiB
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// Copyright 1998-2015 Epic Games, Inc. All Rights Reserved.
/*=============================================================================
OpenGLVertexBuffer.cpp: OpenGL texture RHI implementation.
=============================================================================*/
#include "OpenGLDrvPrivate.h"
#include "ShaderCache.h"
/*-----------------------------------------------------------------------------
Texture allocator support.
-----------------------------------------------------------------------------*/
/** Caching it here, to avoid getting it every time we create a texture. 0 is no multisampling. */
GLint GMaxOpenGLColorSamples = 0;
GLint GMaxOpenGLDepthSamples = 0;
GLint GMaxOpenGLIntegerSamples = 0;
// in bytes, never change after RHI, needed to scale game features
int64 GOpenGLDedicatedVideoMemory = 0;
// In bytes. Never changed after RHI init. Our estimate of the amount of memory that we can use for graphics resources in total.
int64 GOpenGLTotalGraphicsMemory = 0;
static bool ShouldCountAsTextureMemory(uint32 Flags)
{
return (Flags & (TexCreate_RenderTargetable | TexCreate_ResolveTargetable | TexCreate_DepthStencilTargetable)) == 0;
}
void OpenGLTextureAllocated(FRHITexture* Texture, uint32 Flags)
{
int32 TextureSize = 0;
FOpenGLTextureCube* TextureCube = 0;
FOpenGLTexture2D* Texture2D = 0;
FOpenGLTexture2DArray* Texture2DArray = 0;
FOpenGLTexture3D* Texture3D = 0;
bool bRenderTarget = !ShouldCountAsTextureMemory(Flags);
if (( TextureCube = (FOpenGLTextureCube*)Texture->GetTextureCube()) != NULL)
{
TextureSize = CalcTextureSize( TextureCube->GetSize(), TextureCube->GetSize(), TextureCube->GetFormat(), TextureCube->GetNumMips() );
TextureSize *= TextureCube->GetArraySize() * (TextureCube->GetArraySize() == 1 ? 6 : 1);
TextureCube->SetMemorySize( TextureSize );
TextureCube->SetIsPowerOfTwo(FMath::IsPowerOfTwo(TextureCube->GetSizeX()) && FMath::IsPowerOfTwo(TextureCube->GetSizeY()));
if (bRenderTarget)
{
INC_MEMORY_STAT_BY(STAT_RenderTargetMemoryCube,TextureSize);
}
else
{
INC_MEMORY_STAT_BY(STAT_TextureMemoryCube,TextureSize);
}
}
else if ((Texture2D = (FOpenGLTexture2D*)Texture->GetTexture2D()) != NULL)
{
TextureSize = CalcTextureSize( Texture2D->GetSizeX(), Texture2D->GetSizeY(), Texture2D->GetFormat(), Texture2D->GetNumMips() )*Texture2D->GetNumSamples();
Texture2D->SetMemorySize( TextureSize );
Texture2D->SetIsPowerOfTwo(FMath::IsPowerOfTwo(Texture2D->GetSizeX()) && FMath::IsPowerOfTwo(Texture2D->GetSizeY()));
if (bRenderTarget)
{
INC_MEMORY_STAT_BY(STAT_RenderTargetMemory2D,TextureSize);
}
else
{
INC_MEMORY_STAT_BY(STAT_TextureMemory2D,TextureSize);
}
}
else if ((Texture3D = (FOpenGLTexture3D*)Texture->GetTexture3D()) != NULL)
{
TextureSize = CalcTextureSize3D( Texture3D->GetSizeX(), Texture3D->GetSizeY(), Texture3D->GetSizeZ(), Texture3D->GetFormat(), Texture3D->GetNumMips() );
Texture3D->SetMemorySize( TextureSize );
Texture3D->SetIsPowerOfTwo(FMath::IsPowerOfTwo(Texture3D->GetSizeX()) && FMath::IsPowerOfTwo(Texture3D->GetSizeY()) && FMath::IsPowerOfTwo(Texture3D->GetSizeZ()));
if (bRenderTarget)
{
INC_MEMORY_STAT_BY(STAT_RenderTargetMemory3D,TextureSize);
}
else
{
INC_MEMORY_STAT_BY(STAT_TextureMemory3D,TextureSize);
}
}
else if ((Texture2DArray = (FOpenGLTexture2DArray*)Texture->GetTexture2DArray()) != NULL)
{
TextureSize = Texture2DArray->GetSizeZ() * CalcTextureSize( Texture2DArray->GetSizeX(), Texture2DArray->GetSizeY(), Texture2DArray->GetFormat(), Texture2DArray->GetNumMips() );
Texture2DArray->SetMemorySize( TextureSize );
Texture2DArray->SetIsPowerOfTwo(FMath::IsPowerOfTwo(Texture2DArray->GetSizeX()) && FMath::IsPowerOfTwo(Texture2DArray->GetSizeY()));
if (bRenderTarget)
{
INC_MEMORY_STAT_BY(STAT_RenderTargetMemory2D,TextureSize);
}
else
{
INC_MEMORY_STAT_BY(STAT_TextureMemory2D,TextureSize);
}
}
else
{
check(0); // Add handling of other texture types
}
if( bRenderTarget )
{
GCurrentRendertargetMemorySize += Align(TextureSize, 1024) / 1024;
}
else
{
GCurrentTextureMemorySize += Align(TextureSize, 1024) / 1024;
}
}
void OpenGLTextureDeleted( FRHITexture* Texture )
{
FShaderCache::RemoveTexture(Texture);
bool bRenderTarget = !ShouldCountAsTextureMemory(Texture->GetFlags());
int32 TextureSize = 0;
if (Texture->GetTextureCube())
{
TextureSize = ((FOpenGLTextureCube*)Texture->GetTextureCube())->GetMemorySize();
if (bRenderTarget)
{
DEC_MEMORY_STAT_BY(STAT_RenderTargetMemory3D,TextureSize);
}
else
{
DEC_MEMORY_STAT_BY(STAT_TextureMemory3D,TextureSize);
}
}
else if (Texture->GetTexture2D())
{
TextureSize = ((FOpenGLTexture2D*)Texture->GetTexture2D())->GetMemorySize();
if (bRenderTarget)
{
DEC_MEMORY_STAT_BY(STAT_RenderTargetMemory2D,TextureSize);
}
else
{
DEC_MEMORY_STAT_BY(STAT_TextureMemory2D,TextureSize);
}
}
else if (Texture->GetTexture3D())
{
TextureSize = ((FOpenGLTexture3D*)Texture->GetTexture3D())->GetMemorySize();
if (bRenderTarget)
{
DEC_MEMORY_STAT_BY(STAT_RenderTargetMemory3D,TextureSize);
}
else
{
DEC_MEMORY_STAT_BY(STAT_TextureMemory3D,TextureSize);
}
}
else if (Texture->GetTexture2DArray())
{
TextureSize = ((FOpenGLTexture2DArray*)Texture->GetTexture2DArray())->GetMemorySize();
if (bRenderTarget)
{
DEC_MEMORY_STAT_BY(STAT_RenderTargetMemory2D,TextureSize);
}
else
{
DEC_MEMORY_STAT_BY(STAT_TextureMemory2D,TextureSize);
}
}
else
{
check(0); // Add handling of other texture types
}
if( bRenderTarget )
{
GCurrentRendertargetMemorySize -= Align(TextureSize, 1024) / 1024;
}
else
{
GCurrentTextureMemorySize -= Align(TextureSize, 1024) / 1024;
}
}
uint64 FOpenGLDynamicRHI::RHICalcTexture2DPlatformSize(uint32 SizeX, uint32 SizeY, uint8 Format, uint32 NumMips, uint32 NumSamples, uint32 Flags, uint32& OutAlign)
{
OutAlign = 0;
return CalcTextureSize(SizeX, SizeY, (EPixelFormat)Format, NumMips);
}
uint64 FOpenGLDynamicRHI::RHICalcTexture3DPlatformSize(uint32 SizeX, uint32 SizeY, uint32 SizeZ, uint8 Format, uint32 NumMips, uint32 Flags, uint32& OutAlign)
{
OutAlign = 0;
return CalcTextureSize3D(SizeX, SizeY, SizeZ, (EPixelFormat)Format, NumMips);
}
uint64 FOpenGLDynamicRHI::RHICalcTextureCubePlatformSize(uint32 Size, uint8 Format, uint32 NumMips, uint32 Flags, uint32& OutAlign)
{
OutAlign = 0;
return CalcTextureSize(Size, Size, (EPixelFormat)Format, NumMips) * 6;
}
/**
* Retrieves texture memory stats. Unsupported with this allocator.
*
* @return false, indicating that out variables were left unchanged.
*/
void FOpenGLDynamicRHI::RHIGetTextureMemoryStats(FTextureMemoryStats& OutStats)
{
OutStats.DedicatedVideoMemory = GOpenGLDedicatedVideoMemory;
OutStats.DedicatedSystemMemory = 0;
OutStats.SharedSystemMemory = 0;
OutStats.TotalGraphicsMemory = GOpenGLTotalGraphicsMemory ? GOpenGLTotalGraphicsMemory : -1;
OutStats.AllocatedMemorySize = int64(GCurrentTextureMemorySize) * 1024;
OutStats.TexturePoolSize = GTexturePoolSize;
OutStats.PendingMemoryAdjustment = 0;
}
/**
* Fills a texture with to visualize the texture pool memory.
*
* @param TextureData Start address
* @param SizeX Number of pixels along X
* @param SizeY Number of pixels along Y
* @param Pitch Number of bytes between each row
* @param PixelSize Number of bytes each pixel represents
*
* @return true if successful, false otherwise
*/
bool FOpenGLDynamicRHI::RHIGetTextureMemoryVisualizeData( FColor* /*TextureData*/, int32 /*SizeX*/, int32 /*SizeY*/, int32 /*Pitch*/, int32 /*PixelSize*/ )
{
return false;
}
FRHITexture* FOpenGLDynamicRHI::CreateOpenGLTexture(uint32 SizeX, uint32 SizeY, bool bCubeTexture, bool bArrayTexture, uint8 Format, uint32 NumMips, uint32 NumSamples, uint32 ArraySize, uint32 Flags, const FClearValueBinding& InClearValue, FResourceBulkDataInterface* BulkData)
{
VERIFY_GL_SCOPE();
SCOPE_CYCLE_COUNTER(STAT_OpenGLCreateTextureTime);
bool bAllocatedStorage = false;
if(NumMips == 0)
{
if(NumSamples <= 1)
{
NumMips = FindMaxMipmapLevel(SizeX, SizeY);
}
else
{
NumMips = 1;
}
}
#if UE_BUILD_DEBUG
check( !( NumSamples > 1 && bCubeTexture) );
check( bArrayTexture != (ArraySize == 1));
#endif
if (GMaxRHIFeatureLevel <= ERHIFeatureLevel::ES2)
{
// Remove sRGB read flag when not supported
Flags &= ~TexCreate_SRGB;
}
GLuint TextureID = 0;
FOpenGL::GenTextures(1, &TextureID);
GLenum Target = GL_NONE;
if(bCubeTexture)
{
if ( FOpenGL::SupportsTexture3D() )
{
Target = bArrayTexture ? GL_TEXTURE_CUBE_MAP_ARRAY : GL_TEXTURE_CUBE_MAP;
}
else
{
check(!bArrayTexture);
Target = GL_TEXTURE_CUBE_MAP;
}
check(SizeX == SizeY);
}
else
{
Target = (NumSamples > 1) ? GL_TEXTURE_2D_MULTISAMPLE : GL_TEXTURE_2D;
// @todo: refactor 2d texture array support here?
check(!bArrayTexture);
}
check(Target != GL_NONE);
const bool bSRGB = (Flags&TexCreate_SRGB) != 0;
const FOpenGLTextureFormat& GLFormat = GOpenGLTextureFormats[Format];
if (GLFormat.InternalFormat[bSRGB] == GL_NONE)
{
UE_LOG(LogRHI, Fatal,TEXT("Texture format '%s' not supported (sRGB=%d)."), GPixelFormats[Format].Name, bSRGB);
}
FOpenGLContextState& ContextState = GetContextStateForCurrentContext();
// Make sure PBO is disabled
CachedBindPixelUnpackBuffer(ContextState,0);
// Use a texture stage that's not likely to be used for draws, to avoid waiting
CachedSetupTextureStage(ContextState, FOpenGL::GetMaxCombinedTextureImageUnits() - 1, Target, TextureID, 0, NumMips);
// For client storage textures we allocate a single backing store buffer.
uint8* TextureRange = nullptr;
if (NumSamples == 1)
{
if (!FMath::IsPowerOfTwo(SizeX) || !FMath::IsPowerOfTwo(SizeY))
{
glTexParameteri(Target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(Target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
if ( FOpenGL::SupportsTexture3D() )
{
glTexParameteri(Target, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
}
}
else
{
glTexParameteri(Target, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(Target, GL_TEXTURE_WRAP_T, GL_REPEAT);
if ( FOpenGL::SupportsTexture3D() )
{
glTexParameteri(Target, GL_TEXTURE_WRAP_R, GL_REPEAT);
}
}
glTexParameteri(Target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(Target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
if( FOpenGL::SupportsTextureFilterAnisotropic() )
{
glTexParameteri(Target, GL_TEXTURE_MAX_ANISOTROPY_EXT, 1);
}
if ( FOpenGL::SupportsTextureBaseLevel() )
{
glTexParameteri(Target, GL_TEXTURE_BASE_LEVEL, 0);
}
if ( FOpenGL::SupportsTextureMaxLevel() )
{
glTexParameteri(Target, GL_TEXTURE_MAX_LEVEL, NumMips - 1);
}
if (FOpenGL::SupportsTextureSwizzle() && GLFormat.bBGRA && !(Flags & TexCreate_RenderTargetable))
{
glTexParameteri(Target, GL_TEXTURE_SWIZZLE_R, GL_BLUE);
glTexParameteri(Target, GL_TEXTURE_SWIZZLE_B, GL_RED);
}
if (bArrayTexture)
{
FOpenGL::TexStorage3D( Target, NumMips, GLFormat.InternalFormat[bSRGB], SizeX, SizeY, ArraySize, GLFormat.Format, GLFormat.Type);
}
else
{
// Should we use client-storage to improve update time on platforms that require it
bool const bRenderable = (Flags & (TexCreate_RenderTargetable|TexCreate_ResolveTargetable|TexCreate_DepthStencilTargetable)) != 0;
bool const bUseClientStorage = (FOpenGL::SupportsClientStorage() && !FOpenGL::SupportsTextureView() && !bRenderable && !GLFormat.bCompressed);
if(bUseClientStorage)
{
const bool bIsCubeTexture = Target == GL_TEXTURE_CUBE_MAP;
const uint32 TextureSize = CalcTextureSize(SizeX, SizeY, (EPixelFormat)Format, NumMips) * (bIsCubeTexture ? 6 : 1);
const GLenum FirstTarget = bIsCubeTexture ? GL_TEXTURE_CUBE_MAP_POSITIVE_X : Target;
const uint32 NumTargets = bIsCubeTexture ? 6 : 1;
TextureRange = new uint8[TextureSize];
check(TextureRange);
if(FOpenGL::SupportsTextureRange())
{
FOpenGL::TextureRange(Target, TextureSize, TextureRange);
glTexParameteri(Target, GL_TEXTURE_STORAGE_HINT_APPLE, GL_STORAGE_CACHED_APPLE);
}
glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
uint8* MipPointer = TextureRange;
for(uint32 MipIndex = 0; MipIndex < uint32(NumMips); MipIndex++)
{
const uint32 MipSize = CalcTextureMipMapSize(SizeX, SizeY, (EPixelFormat)Format, MipIndex);
for(uint32 TargetIndex = 0; TargetIndex < NumTargets; TargetIndex++)
{
glTexImage2D(
FirstTarget + TargetIndex,
MipIndex,
GLFormat.InternalFormat[bSRGB],
FMath::Max<uint32>(1,(SizeX >> MipIndex)),
FMath::Max<uint32>(1,(SizeY >> MipIndex)),
0,
GLFormat.Format,
GLFormat.Type,
MipPointer
);
MipPointer += MipSize;
}
}
glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_FALSE);
if(FOpenGL::SupportsTextureRange())
{
FOpenGL::TextureRange(Target, 0, 0);
glTexParameteri(Target, GL_TEXTURE_STORAGE_HINT_APPLE, GL_STORAGE_PRIVATE_APPLE);
}
// Leave bAllocatedStorage as false, so that the client storage buffers are setup only when the texture is locked
}
// Try to allocate using TexStorage2D
else if( FOpenGL::TexStorage2D( Target, NumMips, GLFormat.SizedInternalFormat[bSRGB], SizeX, SizeY, GLFormat.Format, GLFormat.Type, Flags) )
{
bAllocatedStorage = true;
}
else if (!GLFormat.bCompressed)
{
// Otherwise, allocate storage for each mip using TexImage2D
// We can't do so for compressed textures because we can't pass NULL in to CompressedTexImage2D!
bAllocatedStorage = true;
const bool bIsCubeTexture = Target == GL_TEXTURE_CUBE_MAP;
const GLenum FirstTarget = bIsCubeTexture ? GL_TEXTURE_CUBE_MAP_POSITIVE_X : Target;
const uint32 NumTargets = bIsCubeTexture ? 6 : 1;
for(uint32 MipIndex = 0; MipIndex < uint32(NumMips); MipIndex++)
{
for(uint32 TargetIndex = 0; TargetIndex < NumTargets; TargetIndex++)
{
glTexImage2D(
FirstTarget + TargetIndex,
MipIndex,
GLFormat.InternalFormat[bSRGB],
FMath::Max<uint32>(1,(SizeX >> MipIndex)),
FMath::Max<uint32>(1,(SizeY >> MipIndex)),
0,
GLFormat.Format,
GLFormat.Type,
NULL
);
}
}
}
}
if (BulkData != NULL)
{
uint8* Data = (uint8*)BulkData->GetResourceBulkData();
uint32 MipOffset = 0;
for(uint32 MipIndex = 0; MipIndex < NumMips; MipIndex++)
{
if(bArrayTexture )
{
if(bCubeTexture)
{
check(FOpenGL::SupportsTexture3D());
FOpenGL::TexSubImage3D(
/*Target=*/ Target,
/*Level=*/ MipIndex,
/* XOffset */ 0,
/* YOffset */ 0,
/* ZOffset */ 0,
/*SizeX=*/ FMath::Max<uint32>(1,(SizeX >> MipIndex)),
/*SizeY=*/ FMath::Max<uint32>(1,(SizeY >> MipIndex)),
/*SizeZ=*/ ArraySize,
/*Format=*/ GLFormat.Format,
/*Type=*/ GLFormat.Type,
/*Data=*/ &Data[MipOffset]
);
}
else
{
// @todo: refactor 2d texture arrays here?
check(!bCubeTexture);
}
}
else
{
GLenum FirstTarget = bCubeTexture ? GL_TEXTURE_CUBE_MAP_POSITIVE_X : Target;
uint32 NumTargets = bCubeTexture ? 6 : 1;
for(uint32 TargetIndex = 0; TargetIndex < NumTargets; TargetIndex++)
{
glTexSubImage2D(
/*Target=*/ FirstTarget + TargetIndex,
/*Level=*/ MipIndex,
/*XOffset*/ 0,
/*YOffset*/ 0,
/*SizeX=*/ FMath::Max<uint32>(1,(SizeX >> MipIndex)),
/*SizeY=*/ FMath::Max<uint32>(1,(SizeY >> MipIndex)),
/*Format=*/ GLFormat.Format,
/*Type=*/ GLFormat.Type,
/*Data=*/ &Data[MipOffset]
);
}
}
uint32 NumBlocksX = FMath::Max<uint32>(1,(SizeX >> MipIndex) / GPixelFormats[Format].BlockSizeX);
uint32 NumBlocksY = FMath::Max<uint32>(1,(SizeY >> MipIndex) / GPixelFormats[Format].BlockSizeY);
uint32 NumLayers = FMath::Max<uint32>(1,ArraySize);
MipOffset += NumBlocksX * NumBlocksY * NumLayers * GPixelFormats[Format].BlockBytes;
}
}
}
else
{
check( FOpenGL::SupportsMultisampledTextures() );
check( BulkData == NULL);
// Try to create an immutable texture and fallback if it fails
if (!FOpenGL::TexStorage2DMultisample( Target, NumSamples, GLFormat.InternalFormat[bSRGB], SizeX, SizeY, true))
{
FOpenGL::TexImage2DMultisample(
Target,
NumSamples,
GLFormat.InternalFormat[bSRGB],
SizeX,
SizeY,
true
);
}
}
// Determine the attachment point for the texture.
GLenum Attachment = GL_NONE;
if((Flags & TexCreate_RenderTargetable) || (Flags & TexCreate_CPUReadback))
{
Attachment = GL_COLOR_ATTACHMENT0;
}
else if(Flags & TexCreate_DepthStencilTargetable)
{
Attachment = (Format == PF_DepthStencil && FOpenGL::SupportsPackedDepthStencil()) ? GL_DEPTH_STENCIL_ATTACHMENT : GL_DEPTH_ATTACHMENT;
}
else if(Flags & TexCreate_ResolveTargetable)
{
Attachment = (Format == PF_DepthStencil && FOpenGL::SupportsPackedDepthStencil())
? GL_DEPTH_STENCIL_ATTACHMENT
: ((Format == PF_ShadowDepth || Format == PF_D24)
? GL_DEPTH_ATTACHMENT
: GL_COLOR_ATTACHMENT0);
}
switch(Attachment)
{
case GL_COLOR_ATTACHMENT0:
check(GMaxOpenGLColorSamples>=(GLint)NumSamples);
break;
case GL_DEPTH_ATTACHMENT:
case GL_DEPTH_STENCIL_ATTACHMENT:
check(GMaxOpenGLDepthSamples>=(GLint)NumSamples);
break;
default:
break;
}
// @todo: If integer pixel format
//check(GMaxOpenGLIntegerSamples>=NumSamples);
FRHITexture* Texture;
if (bCubeTexture)
{
FOpenGLTextureCube* TextureCube = new FOpenGLTextureCube(this, TextureID, Target, Attachment, SizeX, SizeY, 0, NumMips, 1, ArraySize, (EPixelFormat)Format, true, bAllocatedStorage, Flags, TextureRange, InClearValue);
Texture = TextureCube;
}
else
{
FOpenGLTexture2D* Texture2D = new FOpenGLTexture2D(this,TextureID,Target,Attachment,SizeX,SizeY,0,NumMips,NumSamples, 1, (EPixelFormat)Format,false,bAllocatedStorage,Flags,TextureRange, InClearValue);
Texture = Texture2D;
}
OpenGLTextureAllocated( Texture, Flags );
// No need to restore texture stage; leave it like this,
// and the next draw will take care of cleaning it up; or
// next operation that needs the stage will switch something else in on it.
return Texture;
}
#if PLATFORM_MAC || PLATFORM_ANDROIDES31 // Flithy hack to workaround radr://16011763
GLuint FOpenGLTextureBase::GetOpenGLFramebuffer(uint32 ArrayIndices, uint32 MipmapLevels)
{
GLuint FBO = 0;
switch(Attachment)
{
case GL_COLOR_ATTACHMENT0:
{
FOpenGLTextureBase* RenderTarget[] = {this};
FBO = OpenGLRHI->GetOpenGLFramebuffer(1, RenderTarget, &ArrayIndices, &MipmapLevels, NULL);
break;
}
case GL_DEPTH_ATTACHMENT:
case GL_DEPTH_STENCIL_ATTACHMENT:
{
FBO = OpenGLRHI->GetOpenGLFramebuffer(1, NULL, &ArrayIndices, &MipmapLevels, this);
break;
}
default:
break;
}
return FBO;
}
#endif
void FOpenGLTextureBase::InvalidateTextureResourceInCache()
{
OpenGLRHI->InvalidateTextureResourceInCache(Resource);
}
template<typename RHIResourceType>
void TOpenGLTexture<RHIResourceType>::Resolve(uint32 MipIndex,uint32 ArrayIndex)
{
VERIFY_GL_SCOPE();
#if UE_BUILD_DEBUG
if((FOpenGLTexture2D*)this->GetTexture2D())
{
check( ((FOpenGLTexture2D*)this->GetTexture2D())->GetNumSamples() == 1 );
}
#endif
// Calculate the dimensions of the mip-map.
EPixelFormat PixelFormat = this->GetFormat();
const uint32 BlockSizeX = GPixelFormats[PixelFormat].BlockSizeX;
const uint32 BlockSizeY = GPixelFormats[PixelFormat].BlockSizeY;
const uint32 BlockBytes = GPixelFormats[PixelFormat].BlockBytes;
const uint32 MipSizeX = FMath::Max(this->GetSizeX() >> MipIndex,BlockSizeX);
const uint32 MipSizeY = FMath::Max(this->GetSizeY() >> MipIndex,BlockSizeY);
uint32 NumBlocksX = (MipSizeX + BlockSizeX - 1) / BlockSizeX;
uint32 NumBlocksY = (MipSizeY + BlockSizeY - 1) / BlockSizeY;
if ( PixelFormat == PF_PVRTC2 || PixelFormat == PF_PVRTC4 )
{
// PVRTC has minimum 2 blocks width and height
NumBlocksX = FMath::Max<uint32>(NumBlocksX, 2);
NumBlocksY = FMath::Max<uint32>(NumBlocksY, 2);
}
const uint32 MipBytes = NumBlocksX * NumBlocksY * BlockBytes;
const int32 BufferIndex = MipIndex * (bCubemap ? 6 : 1) * this->GetEffectiveSizeZ() + ArrayIndex;
// Standard path with a PBO mirroring ever slice of a texture to allow multiple simulataneous maps
if (!IsValidRef(PixelBuffers[BufferIndex]))
{
PixelBuffers[BufferIndex] = new FOpenGLPixelBuffer(0, MipBytes, BUF_Dynamic);
}
TRefCountPtr<FOpenGLPixelBuffer> PixelBuffer = PixelBuffers[BufferIndex];
check(PixelBuffer->GetSize() == MipBytes);
check(!PixelBuffer->IsLocked());
check( FOpenGL::SupportsPixelBuffers() );
// Transfer data from texture to pixel buffer.
// This may be further optimized by caching information if surface content was changed since last lock.
const FOpenGLTextureFormat& GLFormat = GOpenGLTextureFormats[PixelFormat];
const bool bSRGB = (this->GetFlags() & TexCreate_SRGB) != 0;
// Use a texture stage that's not likely to be used for draws, to avoid waiting
FOpenGLContextState& ContextState = OpenGLRHI->GetContextStateForCurrentContext();
OpenGLRHI->CachedSetupTextureStage(ContextState, FOpenGL::GetMaxCombinedTextureImageUnits() - 1, Target, Resource, -1, this->GetNumMips());
glBindBuffer( GL_PIXEL_PACK_BUFFER, PixelBuffer->Resource );
#if PLATFORM_MAC || PLATFORM_ANDROIDES31 // glReadPixels is async with PBOs - glGetTexImage is not: radr://16011763
if(Attachment == GL_COLOR_ATTACHMENT0 && !GLFormat.bCompressed)
{
GLuint SourceFBO = GetOpenGLFramebuffer(ArrayIndex, MipIndex);
check(SourceFBO > 0);
glBindFramebuffer(UGL_READ_FRAMEBUFFER, SourceFBO);
FOpenGL::ReadBuffer(Attachment);
glPixelStorei(GL_PACK_ALIGNMENT, 1);
glReadPixels(0, 0, MipSizeX, MipSizeY, GLFormat.Format, GLFormat.Type, 0 );
glPixelStorei(GL_PACK_ALIGNMENT, 4);
ContextState.Framebuffer = (GLuint)-1;
}
else
#endif
{
if( this->GetSizeZ() )
{
// apparently it's not possible to retrieve compressed image from GL_TEXTURE_2D_ARRAY in OpenGL for compressed images
// and for uncompressed ones it's not possible to specify the image index
check(0);
}
else
{
if (GLFormat.bCompressed)
{
FOpenGL::GetCompressedTexImage(
bCubemap ? GL_TEXTURE_CUBE_MAP_POSITIVE_X + ArrayIndex : Target,
MipIndex,
0); // offset into PBO
}
else
{
glPixelStorei(GL_PACK_ALIGNMENT, 1);
FOpenGL::GetTexImage(
bCubemap ? GL_TEXTURE_CUBE_MAP_POSITIVE_X + ArrayIndex : Target,
MipIndex,
GLFormat.Format,
GLFormat.Type,
0); // offset into PBO
glPixelStorei(GL_PACK_ALIGNMENT, 4);
}
}
}
glBindBuffer( GL_PIXEL_PACK_BUFFER, 0 );
// No need to restore texture stage; leave it like this,
// and the next draw will take care of cleaning it up; or
// next operation that needs the stage will switch something else in on it.
}
template<typename RHIResourceType>
void* TOpenGLTexture<RHIResourceType>::Lock(uint32 InMipIndex,uint32 ArrayIndex,EResourceLockMode LockMode,uint32& DestStride)
{
VERIFY_GL_SCOPE();
#if UE_BUILD_DEBUG
if((FOpenGLTexture2D*)this->GetTexture2D())
{
check( ((FOpenGLTexture2D*)this->GetTexture2D())->GetNumSamples() == 1 );
}
#endif
SCOPE_CYCLE_COUNTER(STAT_OpenGLLockTextureTime);
void* result = NULL;
// Calculate the dimensions of the mip-map.
EPixelFormat PixelFormat = this->GetFormat();
const uint32 BlockSizeX = GPixelFormats[PixelFormat].BlockSizeX;
const uint32 BlockSizeY = GPixelFormats[PixelFormat].BlockSizeY;
const uint32 BlockBytes = GPixelFormats[PixelFormat].BlockBytes;
const uint32 MipSizeX = FMath::Max(this->GetSizeX() >> InMipIndex,BlockSizeX);
const uint32 MipSizeY = FMath::Max(this->GetSizeY() >> InMipIndex,BlockSizeY);
uint32 NumBlocksX = (MipSizeX + BlockSizeX - 1) / BlockSizeX;
uint32 NumBlocksY = (MipSizeY + BlockSizeY - 1) / BlockSizeY;
if ( PixelFormat == PF_PVRTC2 || PixelFormat == PF_PVRTC4 )
{
// PVRTC has minimum 2 blocks width and height
NumBlocksX = FMath::Max<uint32>(NumBlocksX, 2);
NumBlocksY = FMath::Max<uint32>(NumBlocksY, 2);
}
const uint32 MipBytes = NumBlocksX * NumBlocksY * BlockBytes;
DestStride = NumBlocksX * BlockBytes;
const int32 BufferIndex = InMipIndex * (bCubemap ? 6 : 1) * this->GetEffectiveSizeZ() + ArrayIndex;
// Should we use client-storage to improve update time on platforms that require it
const FOpenGLTextureFormat& GLFormat = GOpenGLTextureFormats[PixelFormat];
bool const bRenderable = (this->GetFlags() & (TexCreate_RenderTargetable|TexCreate_ResolveTargetable|TexCreate_DepthStencilTargetable)) != 0;
bool const bUseClientStorage = FOpenGL::SupportsClientStorage() && !FOpenGL::SupportsTextureView() && !bRenderable && !this->GetSizeZ() && !GLFormat.bCompressed;
if(!bUseClientStorage)
{
// Standard path with a PBO mirroring ever slice of a texture to allow multiple simulataneous maps
bool bBufferExists = true;
if (!IsValidRef(PixelBuffers[BufferIndex]))
{
bBufferExists = false;
PixelBuffers[BufferIndex] = new FOpenGLPixelBuffer(0, MipBytes, BUF_Dynamic);
}
TRefCountPtr<FOpenGLPixelBuffer> PixelBuffer = PixelBuffers[BufferIndex];
check(PixelBuffer->GetSize() == MipBytes);
check(!PixelBuffer->IsLocked());
// If the buffer already exists & the flags are such that the texture cannot be rendered to & is CPU accessible then we can skip the internal resolve for read locks. This makes HZB occlusion faster.
const bool bCPUTexResolved = bBufferExists && (this->GetFlags() & TexCreate_CPUReadback) && !(this->GetFlags() & (TexCreate_RenderTargetable|TexCreate_DepthStencilTargetable));
if( LockMode != RLM_WriteOnly && !bCPUTexResolved && FOpenGL::SupportsPixelBuffers() )
{
Resolve(InMipIndex, ArrayIndex);
}
result = PixelBuffer->Lock(0, PixelBuffer->GetSize(), LockMode == RLM_ReadOnly, LockMode != RLM_ReadOnly);
}
else
{
// Use APPLE_client_storage to reduce memory usage and improve performance
// GL's which support this extension only need copy a pointer, not the memory contents
check( FOpenGL::SupportsClientStorage() && !FOpenGL::SupportsTextureView() );
if(GetAllocatedStorageForMip(InMipIndex,ArrayIndex))
{
result = ClientStorageBuffers[BufferIndex].Data;
}
else
{
// The assumption at present is that this only applies to 2D & cubemap textures
// Array, 3D and variants thereof aren't supported.
const bool bIsCubeTexture = Target == GL_TEXTURE_CUBE_MAP;
const GLenum FirstTarget = bIsCubeTexture ? GL_TEXTURE_CUBE_MAP_POSITIVE_X : Target;
const uint32 NumTargets = bIsCubeTexture ? 6 : 1;
uint8* MipPointer = TextureRange;
for(uint32 MipIndex = 0; MipIndex < FOpenGLTextureBase::NumMips; MipIndex++)
{
const uint32 MipSize = CalcTextureMipMapSize(this->GetSizeX(), this->GetSizeY(), PixelFormat, MipIndex);
for(uint32 TargetIndex = 0; TargetIndex < NumTargets; TargetIndex++)
{
const int32 ClientIndex = (MipIndex * NumTargets) + TargetIndex;
ClientStorageBuffers[ClientIndex].Data = MipPointer;
ClientStorageBuffers[ClientIndex].Size = MipSize;
ClientStorageBuffers[ClientIndex].bReadOnly = false;
MipPointer += MipSize;
SetAllocatedStorageForMip(MipIndex,TargetIndex);
}
}
result = ClientStorageBuffers[BufferIndex].Data;
}
}
return result;
}
// Copied from OpenGLDebugFrameDump.
inline uint32 HalfFloatToFloatInteger(uint16 HalfFloat)
{
uint32 Sign = (HalfFloat >> 15) & 0x00000001;
uint32 Exponent = (HalfFloat >> 10) & 0x0000001f;
uint32 Mantiss = HalfFloat & 0x000003ff;
if (Exponent == 0)
{
if (Mantiss == 0) // Plus or minus zero
{
return Sign << 31;
}
else // Denormalized number -- renormalize it
{
while ((Mantiss & 0x00000400) == 0)
{
Mantiss <<= 1;
Exponent -= 1;
}
Exponent += 1;
Mantiss &= ~0x00000400;
}
}
else if (Exponent == 31)
{
if (Mantiss == 0) // Inf
return (Sign << 31) | 0x7f800000;
else // NaN
return (Sign << 31) | 0x7f800000 | (Mantiss << 13);
}
Exponent = Exponent + (127 - 15);
Mantiss = Mantiss << 13;
return (Sign << 31) | (Exponent << 23) | Mantiss;
}
inline float HalfFloatToFloat(uint16 HalfFloat)
{
union
{
float F;
uint32 I;
} Convert;
Convert.I = HalfFloatToFloatInteger(HalfFloat);
return Convert.F;
}
template<typename RHIResourceType>
void TOpenGLTexture<RHIResourceType>::Unlock(uint32 MipIndex,uint32 ArrayIndex)
{
VERIFY_GL_SCOPE();
SCOPE_CYCLE_COUNTER(STAT_OpenGLUnlockTextureTime);
const int32 BufferIndex = MipIndex * (bCubemap ? 6 : 1) * this->GetEffectiveSizeZ() + ArrayIndex;
TRefCountPtr<FOpenGLPixelBuffer> PixelBuffer = PixelBuffers[BufferIndex];
const FOpenGLTextureFormat& GLFormat = GOpenGLTextureFormats[this->GetFormat()];
const bool bSRGB = (this->GetFlags() & TexCreate_SRGB) != 0;
// Should we use client-storage to improve update time on platforms that require it
bool const bRenderable = (this->GetFlags() & (TexCreate_RenderTargetable|TexCreate_ResolveTargetable|TexCreate_DepthStencilTargetable)) != 0;
bool const bUseClientStorage = FOpenGL::SupportsClientStorage() && !FOpenGL::SupportsTextureView() && !bRenderable && !this->GetSizeZ() && !GLFormat.bCompressed;
check(bUseClientStorage || IsValidRef(PixelBuffers[BufferIndex]));
#if PLATFORM_ANDROID
// check for FloatRGBA to RGBA8 conversion needed
if (this->GetFormat() == PF_FloatRGBA && GLFormat.Type == GL_UNSIGNED_BYTE)
{
UE_LOG(LogRHI, Warning, TEXT("Converting texture from PF_FloatRGBA to RGBA8! Only supported for limited cases of 0.0 to 1.0 values (clamped)"));
// Code path for non-PBO: and always uncompressed!
// Volume/array textures are currently only supported if PixelBufferObjects are also supported.
check(this->GetSizeZ() == 0);
// Use a texture stage that's not likely to be used for draws, to avoid waiting
FOpenGLContextState& ContextState = OpenGLRHI->GetContextStateForCurrentContext();
OpenGLRHI->CachedSetupTextureStage(ContextState, FOpenGL::GetMaxCombinedTextureImageUnits() - 1, Target, Resource, -1, this->GetNumMips());
CachedBindPixelUnpackBuffer(0);
// get the source data and size
uint16* floatData = (uint16*)PixelBuffer->GetLockedBuffer();
int32 texWidth = FMath::Max<uint32>(1, (this->GetSizeX() >> MipIndex));
int32 texHeight = FMath::Max<uint32>(1, (this->GetSizeY() >> MipIndex));
// always RGBA8 so 4 bytes / pixel
int nValues = texWidth * texHeight * 4;
uint8* rgbaData = (uint8*)FMemory::Malloc(nValues);
// convert to GL_BYTE (saturate)
uint8* outPtr = rgbaData;
while (nValues--)
{
int32 pixelValue = (int32)(HalfFloatToFloat(*floatData++) * 255.0f);
*outPtr++ = (uint8)(pixelValue < 0 ? 0 : (pixelValue < 256 ? pixelValue : 255));
}
// All construction paths should have called TexStorage2D or TexImage2D. So we will
// always call TexSubImage2D.
check(GetAllocatedStorageForMip(MipIndex, ArrayIndex) == true);
glTexSubImage2D(
bCubemap ? GL_TEXTURE_CUBE_MAP_POSITIVE_X + ArrayIndex : Target,
MipIndex,
0,
0,
texWidth,
texHeight,
GLFormat.Format,
GLFormat.Type,
rgbaData);
// free temporary conversion buffer
FMemory::Free(rgbaData);
// Unlock "PixelBuffer" and free the temp memory after the texture upload.
PixelBuffer->Unlock();
// No need to restore texture stage; leave it like this,
// and the next draw will take care of cleaning it up; or
// next operation that needs the stage will switch something else in on it.
CachedBindPixelUnpackBuffer(0);
return;
}
#endif
if ( !bUseClientStorage && FOpenGL::SupportsPixelBuffers() )
{
// Code path for PBO per slice
check(IsValidRef(PixelBuffers[BufferIndex]));
PixelBuffer->Unlock();
// Modify permission?
if (!PixelBuffer->IsLockReadOnly())
{
// Use a texture stage that's not likely to be used for draws, to avoid waiting
FOpenGLContextState& ContextState = OpenGLRHI->GetContextStateForCurrentContext();
OpenGLRHI->CachedSetupTextureStage(ContextState, FOpenGL::GetMaxCombinedTextureImageUnits() - 1, Target, Resource, -1, this->GetNumMips());
if( this->GetSizeZ() )
{
// texture 2D array
if (GLFormat.bCompressed)
{
FOpenGL::CompressedTexSubImage3D(
Target,
MipIndex,
0,
0,
ArrayIndex,
FMath::Max<uint32>(1,(this->GetSizeX() >> MipIndex)),
FMath::Max<uint32>(1,(this->GetSizeY() >> MipIndex)),
1,
GLFormat.InternalFormat[bSRGB],
PixelBuffer->GetSize(),
0);
}
else
{
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
check( FOpenGL::SupportsTexture3D() );
FOpenGL::TexSubImage3D(
Target,
MipIndex,
0,
0,
ArrayIndex,
FMath::Max<uint32>(1,(this->GetSizeX() >> MipIndex)),
FMath::Max<uint32>(1,(this->GetSizeY() >> MipIndex)),
1,
GLFormat.Format,
GLFormat.Type,
0); // offset into PBO
glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
}
}
else
{
if (GLFormat.bCompressed)
{
if (GetAllocatedStorageForMip(MipIndex,ArrayIndex))
{
glCompressedTexSubImage2D(
bCubemap ? GL_TEXTURE_CUBE_MAP_POSITIVE_X + ArrayIndex : Target,
MipIndex,
0,
0,
FMath::Max<uint32>(1,(this->GetSizeX() >> MipIndex)),
FMath::Max<uint32>(1,(this->GetSizeY() >> MipIndex)),
GLFormat.InternalFormat[bSRGB],
PixelBuffer->GetSize(),
0); // offset into PBO
}
else
{
glCompressedTexImage2D(
bCubemap ? GL_TEXTURE_CUBE_MAP_POSITIVE_X + ArrayIndex : Target,
MipIndex,
GLFormat.InternalFormat[bSRGB],
FMath::Max<uint32>(1,(this->GetSizeX() >> MipIndex)),
FMath::Max<uint32>(1,(this->GetSizeY() >> MipIndex)),
0,
PixelBuffer->GetSize(),
0); // offset into PBO
SetAllocatedStorageForMip(MipIndex,ArrayIndex);
}
}
else
{
// All construction paths should have called TexStorage2D or TexImage2D. So we will
// always call TexSubImage2D.
check(GetAllocatedStorageForMip(MipIndex,ArrayIndex) == true);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glTexSubImage2D(
bCubemap ? GL_TEXTURE_CUBE_MAP_POSITIVE_X + ArrayIndex : Target,
MipIndex,
0,
0,
FMath::Max<uint32>(1,(this->GetSizeX() >> MipIndex)),
FMath::Max<uint32>(1,(this->GetSizeY() >> MipIndex)),
GLFormat.Format,
GLFormat.Type,
0); // offset into PBO
glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
}
}
}
//need to free PBO if we aren't keeping shadow copies
PixelBuffers[BufferIndex] = NULL;
}
else
{
// Code path for non-PBO:
// Volume/array textures are currently only supported if PixelBufferObjects are also supported.
check(this->GetSizeZ() == 0);
// Use a texture stage that's not likely to be used for draws, to avoid waiting
FOpenGLContextState& ContextState = OpenGLRHI->GetContextStateForCurrentContext();
OpenGLRHI->CachedSetupTextureStage(ContextState, FOpenGL::GetMaxCombinedTextureImageUnits() - 1, Target, Resource, -1, this->GetNumMips());
CachedBindPixelUnpackBuffer( 0 );
uint32 LockedSize = 0;
void* LockedBuffer = nullptr;
if(bUseClientStorage)
{
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
LockedSize = ClientStorageBuffers[BufferIndex].Size;
LockedBuffer = ClientStorageBuffers[BufferIndex].Data;
}
else
{
LockedSize = PixelBuffer->GetSize();
LockedBuffer = PixelBuffer->GetLockedBuffer();
}
if (GLFormat.bCompressed)
{
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
if (GetAllocatedStorageForMip(MipIndex,ArrayIndex))
{
glCompressedTexSubImage2D(
bCubemap ? GL_TEXTURE_CUBE_MAP_POSITIVE_X + ArrayIndex : Target,
MipIndex,
0,
0,
FMath::Max<uint32>(1,(this->GetSizeX() >> MipIndex)),
FMath::Max<uint32>(1,(this->GetSizeY() >> MipIndex)),
GLFormat.InternalFormat[bSRGB],
LockedSize,
LockedBuffer);
}
else
{
glCompressedTexImage2D(
bCubemap ? GL_TEXTURE_CUBE_MAP_POSITIVE_X + ArrayIndex : Target,
MipIndex,
GLFormat.InternalFormat[bSRGB],
FMath::Max<uint32>(1,(this->GetSizeX() >> MipIndex)),
FMath::Max<uint32>(1,(this->GetSizeY() >> MipIndex)),
0,
LockedSize,
LockedBuffer);
SetAllocatedStorageForMip(MipIndex,ArrayIndex);
}
glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
}
else
{
if (GetAllocatedStorageForMip(MipIndex,ArrayIndex))
{
glTexSubImage2D(
bCubemap ? GL_TEXTURE_CUBE_MAP_POSITIVE_X + ArrayIndex : Target,
MipIndex,
0,
0,
FMath::Max<uint32>(1,(this->GetSizeX() >> MipIndex)),
FMath::Max<uint32>(1,(this->GetSizeY() >> MipIndex)),
GLFormat.Format,
GLFormat.Type,
LockedBuffer);
}
else
{
glTexImage2D(
bCubemap ? GL_TEXTURE_CUBE_MAP_POSITIVE_X + ArrayIndex : Target,
MipIndex,
GLFormat.InternalFormat[bSRGB],
FMath::Max<uint32>(1,(this->GetSizeX() >> MipIndex)),
FMath::Max<uint32>(1,(this->GetSizeY() >> MipIndex)),
0,
GLFormat.Format,
GLFormat.Type,
LockedBuffer);
SetAllocatedStorageForMip(MipIndex,ArrayIndex);
}
}
if(bUseClientStorage)
{
glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_FALSE);
}
else
{
// Unlock "PixelBuffer" and free the temp memory after the texture upload.
PixelBuffer->Unlock();
}
}
// No need to restore texture stage; leave it like this,
// and the next draw will take care of cleaning it up; or
// next operation that needs the stage will switch something else in on it.
CachedBindPixelUnpackBuffer(0);
}
template<typename RHIResourceType>
void TOpenGLTexture<RHIResourceType>::CloneViaCopyImage( TOpenGLTexture<RHIResourceType>* Src, uint32 NumMips, int32 SrcOffset, int32 DstOffset)
{
VERIFY_GL_SCOPE();
check(FOpenGL::SupportsCopyImage());
for (uint32 ArrayIndex = 0; ArrayIndex < this->GetEffectiveSizeZ(); ArrayIndex++)
{
// use the Copy Image functionality to copy mip level by mip level
for(uint32 MipIndex = 0;MipIndex < NumMips;++MipIndex)
{
// Calculate the dimensions of the mip-map.
const uint32 DstMipIndex = MipIndex + DstOffset;
const uint32 SrcMipIndex = MipIndex + SrcOffset;
const uint32 MipSizeX = FMath::Max(this->GetSizeX() >> DstMipIndex,uint32(1));
const uint32 MipSizeY = FMath::Max(this->GetSizeY() >> DstMipIndex,uint32(1));
if(FOpenGL::AmdWorkaround() && ((MipSizeX < 4) || (MipSizeY < 4))) break;
// copy the texture data
FOpenGL::CopyImageSubData( Src->Resource, Src->Target, SrcMipIndex, 0, 0, ArrayIndex,
Resource, Target, DstMipIndex, 0, 0, ArrayIndex, MipSizeX, MipSizeY, 1);
}
}
}
template<typename RHIResourceType>
void TOpenGLTexture<RHIResourceType>::CloneViaPBO( TOpenGLTexture<RHIResourceType>* Src, uint32 NumMips, int32 SrcOffset, int32 DstOffset)
{
VERIFY_GL_SCOPE();
// apparently it's not possible to retrieve compressed image from GL_TEXTURE_2D_ARRAY in OpenGL for compressed images
// and for uncompressed ones it's not possible to specify the image index
check(this->GetSizeZ() == 0);
// only PBO path is supported here
check( FOpenGL::SupportsPixelBuffers() );
EPixelFormat PixelFormat = this->GetFormat();
check(PixelFormat == Src->GetFormat());
const FOpenGLTextureFormat& GLFormat = GOpenGLTextureFormats[PixelFormat];
const bool bSRGB = (this->GetFlags() & TexCreate_SRGB) != 0;
check(bSRGB == ((Src->GetFlags() & TexCreate_SRGB) != 0));
const uint32 BlockSizeX = GPixelFormats[PixelFormat].BlockSizeX;
const uint32 BlockSizeY = GPixelFormats[PixelFormat].BlockSizeY;
const uint32 BlockBytes = GPixelFormats[PixelFormat].BlockBytes;
FOpenGLContextState& ContextState = OpenGLRHI->GetContextStateForCurrentContext();
for (uint32 ArrayIndex = 0; ArrayIndex < this->GetEffectiveSizeZ(); ArrayIndex++)
{
// use PBO functionality to copy mip level by mip level
for(uint32 MipIndex = 0;MipIndex < NumMips;++MipIndex)
{
// Actual mip levels
const uint32 DstMipIndex = MipIndex + DstOffset;
const uint32 SrcMipIndex = MipIndex + SrcOffset;
// Calculate the dimensions of the mip-map.
const uint32 MipSizeX = FMath::Max(this->GetSizeX() >> DstMipIndex,1u);
const uint32 MipSizeY = FMath::Max(this->GetSizeY() >> DstMipIndex,1u);
// Then the rounded PBO size required to capture this mip
const uint32 DataSizeX = FMath::Max(MipSizeX,BlockSizeX);
const uint32 DataSizeY = FMath::Max(MipSizeY,BlockSizeY);
uint32 NumBlocksX = (DataSizeX + BlockSizeX - 1) / BlockSizeX;
uint32 NumBlocksY = (DataSizeY + BlockSizeY - 1) / BlockSizeY;
if ( PixelFormat == PF_PVRTC2 || PixelFormat == PF_PVRTC4 )
{
// PVRTC has minimum 2 blocks width and height
NumBlocksX = FMath::Max<uint32>(NumBlocksX, 2);
NumBlocksY = FMath::Max<uint32>(NumBlocksY, 2);
}
const uint32 MipBytes = NumBlocksX * NumBlocksY * BlockBytes;
const int32 BufferIndex = DstMipIndex * (bCubemap ? 6 : 1) * this->GetEffectiveSizeZ() + ArrayIndex;
// Standard path with a PBO mirroring ever slice of a texture to allow multiple simulataneous maps
if (!IsValidRef(PixelBuffers[BufferIndex]))
{
PixelBuffers[BufferIndex] = new FOpenGLPixelBuffer(0, MipBytes, BUF_Dynamic);
}
TRefCountPtr<FOpenGLPixelBuffer> PixelBuffer = PixelBuffers[BufferIndex];
check(PixelBuffer->GetSize() == MipBytes);
check(!PixelBuffer->IsLocked());
// Transfer data from texture to pixel buffer.
// This may be further optimized by caching information if surface content was changed since last lock.
{
// Use a texture stage that's not likely to be used for draws, to avoid waiting
OpenGLRHI->CachedSetupTextureStage(ContextState, FOpenGL::GetMaxCombinedTextureImageUnits() - 1, Src->Target, Src->Resource, -1, this->GetNumMips());
glBindBuffer( GL_PIXEL_PACK_BUFFER, PixelBuffer->Resource );
#if PLATFORM_MAC || PLATFORM_ANDROIDES31 // glReadPixels is async with PBOs - glGetTexImage is not: radr://16011763
if(Attachment == GL_COLOR_ATTACHMENT0 && !GLFormat.bCompressed)
{
GLuint SourceFBO = Src->GetOpenGLFramebuffer(ArrayIndex, SrcMipIndex);
check(SourceFBO > 0);
glBindFramebuffer(UGL_READ_FRAMEBUFFER, SourceFBO);
FOpenGL::ReadBuffer(Attachment);
glPixelStorei(GL_PACK_ALIGNMENT, 1);
glReadPixels(0, 0, MipSizeX, MipSizeY, GLFormat.Format, GLFormat.Type, 0 );
glPixelStorei(GL_PACK_ALIGNMENT, 4);
ContextState.Framebuffer = (GLuint)-1;
}
else
#endif
if (GLFormat.bCompressed)
{
FOpenGL::GetCompressedTexImage(Src->bCubemap ? GL_TEXTURE_CUBE_MAP_POSITIVE_X + ArrayIndex : Src->Target,
SrcMipIndex,
0); // offset into PBO
}
else
{
glPixelStorei(GL_PACK_ALIGNMENT, 1);
FOpenGL::GetTexImage(Src->bCubemap ? GL_TEXTURE_CUBE_MAP_POSITIVE_X + ArrayIndex : Src->Target,
SrcMipIndex,
GLFormat.Format,
GLFormat.Type,
0); // offset into PBO
glPixelStorei(GL_PACK_ALIGNMENT, 4);
}
}
// copy the texture data
// Upload directly into Dst to avoid out-of-band synchronization caused by glMapBuffer!
{
CachedBindPixelUnpackBuffer( PixelBuffer->Resource );
// Use a texture stage that's not likely to be used for draws, to avoid waiting
OpenGLRHI->CachedSetupTextureStage(ContextState, FOpenGL::GetMaxCombinedTextureImageUnits() - 1, Target, Resource, -1, this->GetNumMips());
if( this->GetSizeZ() )
{
// texture 2D array
if (GLFormat.bCompressed)
{
FOpenGL::CompressedTexSubImage3D(Target,
DstMipIndex,
0,
0,
ArrayIndex,
MipSizeX,
MipSizeY,
1,
GLFormat.InternalFormat[bSRGB],
PixelBuffer->GetSize(),
0);
}
else
{
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
check( FOpenGL::SupportsTexture3D() );
FOpenGL::TexSubImage3D(Target,
DstMipIndex,
0,
0,
ArrayIndex,
MipSizeX,
MipSizeY,
1,
GLFormat.Format,
GLFormat.Type,
0); // offset into PBO
glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
}
}
else
{
if (GLFormat.bCompressed)
{
if (GetAllocatedStorageForMip(DstMipIndex,ArrayIndex))
{
glCompressedTexSubImage2D(bCubemap ? GL_TEXTURE_CUBE_MAP_POSITIVE_X + ArrayIndex : Target,
DstMipIndex,
0,
0,
MipSizeX,
MipSizeY,
GLFormat.InternalFormat[bSRGB],
PixelBuffer->GetSize(),
0); // offset into PBO
}
else
{
glCompressedTexImage2D(bCubemap ? GL_TEXTURE_CUBE_MAP_POSITIVE_X + ArrayIndex : Target,
DstMipIndex,
GLFormat.InternalFormat[bSRGB],
MipSizeX,
MipSizeY,
0,
PixelBuffer->GetSize(),
0); // offset into PBO
SetAllocatedStorageForMip(DstMipIndex,ArrayIndex);
}
}
else
{
// All construction paths should have called TexStorage2D or TexImage2D. So we will
// always call TexSubImage2D.
check(GetAllocatedStorageForMip(DstMipIndex,ArrayIndex) == true);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glTexSubImage2D(bCubemap ? GL_TEXTURE_CUBE_MAP_POSITIVE_X + ArrayIndex : Target,
DstMipIndex,
0,
0,
MipSizeX,
MipSizeY,
GLFormat.Format,
GLFormat.Type,
0); // offset into PBO
glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
}
}
}
// need to free PBO if we aren't keeping shadow copies
PixelBuffers[BufferIndex] = NULL;
// No need to restore texture stage; leave it like this,
// and the next draw will take care of cleaning it up; or
// next operation that needs the stage will switch something else in on it.
}
}
// Reset the buffer bindings on exit only
glBindBuffer( GL_PIXEL_PACK_BUFFER, 0 );
CachedBindPixelUnpackBuffer(0);
}
/*-----------------------------------------------------------------------------
2D texture support.
-----------------------------------------------------------------------------*/
/**
* Creates a 2D RHI texture resource
* @param SizeX - width of the texture to create
* @param SizeY - height of the texture to create
* @param Format - EPixelFormat texture format
* @param NumMips - number of mips to generate or 0 for full mip pyramid
* @param Flags - ETextureCreateFlags creation flags
*/
FTexture2DRHIRef FOpenGLDynamicRHI::RHICreateTexture2D(uint32 SizeX,uint32 SizeY,uint8 Format,uint32 NumMips,uint32 NumSamples,uint32 Flags,FRHIResourceCreateInfo& Info)
{
return (FRHITexture2D*)CreateOpenGLTexture(SizeX,SizeY,false,false,Format,NumMips,NumSamples,1,Flags,Info.ClearValueBinding,Info.BulkData);
}
FTexture2DRHIRef FOpenGLDynamicRHI::RHIAsyncCreateTexture2D(uint32 SizeX, uint32 SizeY, uint8 Format, uint32 NumMips, uint32 Flags, void** InitialMipData, uint32 NumInitialMips)
{
check(0);
return FTexture2DRHIRef();
}
void FOpenGLDynamicRHI::RHICopySharedMips(FTexture2DRHIParamRef DestTexture2D,FTexture2DRHIParamRef SrcTexture2D)
{
check(0);
}
FTexture2DArrayRHIRef FOpenGLDynamicRHI::RHICreateTexture2DArray(uint32 SizeX,uint32 SizeY,uint32 SizeZ,uint8 Format,uint32 NumMips,uint32 Flags, FRHIResourceCreateInfo& Info)
{
VERIFY_GL_SCOPE();
SCOPE_CYCLE_COUNTER(STAT_OpenGLCreateTextureTime);
check( FOpenGL::SupportsTexture3D() );
if(NumMips == 0)
{
NumMips = FindMaxMipmapLevel(SizeX, SizeY);
}
if (GMaxRHIFeatureLevel <= ERHIFeatureLevel::ES2)
{
// Remove sRGB read flag when not supported
Flags &= ~TexCreate_SRGB;
}
GLuint TextureID = 0;
FOpenGL::GenTextures(1, &TextureID);
const GLenum Target = GL_TEXTURE_2D_ARRAY;
// Use a texture stage that's not likely to be used for draws, to avoid waiting
FOpenGLContextState& ContextState = GetContextStateForCurrentContext();
CachedSetupTextureStage(ContextState, FOpenGL::GetMaxCombinedTextureImageUnits() - 1, Target, TextureID, 0, NumMips);
glTexParameteri(Target, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(Target, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(Target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(Target, GL_TEXTURE_MIN_FILTER, NumMips > 1 ? GL_NEAREST_MIPMAP_NEAREST : GL_NEAREST);
if( FOpenGL::SupportsTextureFilterAnisotropic() )
{
glTexParameteri(Target, GL_TEXTURE_MAX_ANISOTROPY_EXT, 1);
}
glTexParameteri(Target, GL_TEXTURE_BASE_LEVEL, 0);
glTexParameteri(Target, GL_TEXTURE_MAX_LEVEL, NumMips - 1);
const bool bSRGB = (Flags&TexCreate_SRGB) != 0;
const FOpenGLTextureFormat& GLFormat = GOpenGLTextureFormats[Format];
if (GLFormat.InternalFormat[bSRGB] == GL_NONE)
{
UE_LOG(LogRHI, Fatal,TEXT("Texture format '%s' not supported."), GPixelFormats[Format].Name);
}
checkf(!GLFormat.bCompressed, TEXT("%s compressed 2D texture arrays not currently supported by the OpenGL RHI"), GPixelFormats[Format].Name);
// Make sure PBO is disabled
CachedBindPixelUnpackBuffer(ContextState, 0);
uint8* Data = Info.BulkData ? (uint8*)Info.BulkData->GetResourceBulkData() : NULL;
uint32 MipOffset = 0;
FOpenGL::TexStorage3D( Target, NumMips, GLFormat.InternalFormat[bSRGB], SizeX, SizeY, SizeZ, GLFormat.Format, GLFormat.Type );
if (Data)
{
for(uint32 MipIndex = 0; MipIndex < NumMips; MipIndex++)
{
FOpenGL::TexSubImage3D(
/*Target=*/ Target,
/*Level=*/ MipIndex,
0,
0,
0,
/*SizeX=*/ FMath::Max<uint32>(1,(SizeX >> MipIndex)),
/*SizeY=*/ FMath::Max<uint32>(1,(SizeY >> MipIndex)),
/*SizeZ=*/ SizeZ,
/*Format=*/ GLFormat.Format,
/*Type=*/ GLFormat.Type,
/*Data=*/ Data ? &Data[MipOffset] : NULL
);
uint32 SysMemPitch = FMath::Max<uint32>(1,SizeX >> MipIndex) * GPixelFormats[Format].BlockBytes;
uint32 SysMemSlicePitch = FMath::Max<uint32>(1,SizeY >> MipIndex) * SysMemPitch;
MipOffset += SizeZ * SysMemSlicePitch;
}
}
// Determine the attachment point for the texture.
GLenum Attachment = GL_NONE;
if(Flags & TexCreate_RenderTargetable)
{
Attachment = GL_COLOR_ATTACHMENT0;
}
else if(Flags & TexCreate_DepthStencilTargetable)
{
Attachment = (FOpenGL::SupportsPackedDepthStencil() && Format == PF_DepthStencil) ? GL_DEPTH_STENCIL_ATTACHMENT : GL_DEPTH_ATTACHMENT;
}
else if(Flags & TexCreate_ResolveTargetable)
{
Attachment = (Format == PF_DepthStencil && FOpenGL::SupportsPackedDepthStencil())
? GL_DEPTH_STENCIL_ATTACHMENT
: ((Format == PF_ShadowDepth || Format == PF_D24)
? GL_DEPTH_ATTACHMENT
: GL_COLOR_ATTACHMENT0);
}
FOpenGLTexture2DArray* Texture = new FOpenGLTexture2DArray(this,TextureID,Target,Attachment,SizeX,SizeY,SizeZ,NumMips,1, SizeZ, (EPixelFormat)Format,false,true,Flags,nullptr,Info.ClearValueBinding);
OpenGLTextureAllocated( Texture, Flags );
// No need to restore texture stage; leave it like this,
// and the next draw will take care of cleaning it up; or
// next operation that needs the stage will switch something else in on it.
return Texture;
}
FTexture3DRHIRef FOpenGLDynamicRHI::RHICreateTexture3D(uint32 SizeX,uint32 SizeY,uint32 SizeZ,uint8 Format,uint32 NumMips,uint32 Flags,FRHIResourceCreateInfo& CreateInfo)
{
VERIFY_GL_SCOPE();
SCOPE_CYCLE_COUNTER(STAT_OpenGLCreateTextureTime);
check( FOpenGL::SupportsTexture3D() );
if(NumMips == 0)
{
NumMips = FindMaxMipmapLevel(SizeX, SizeY, SizeZ);
}
if (GMaxRHIFeatureLevel <= ERHIFeatureLevel::ES2)
{
// Remove sRGB read flag when not supported
Flags &= ~TexCreate_SRGB;
}
GLuint TextureID = 0;
FOpenGL::GenTextures(1, &TextureID);
const GLenum Target = GL_TEXTURE_3D;
// Use a texture stage that's not likely to be used for draws, to avoid waiting
FOpenGLContextState& ContextState = GetContextStateForCurrentContext();
CachedSetupTextureStage(ContextState, FOpenGL::GetMaxCombinedTextureImageUnits() - 1, Target, TextureID, 0, NumMips);
glTexParameteri(Target, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(Target, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(Target, GL_TEXTURE_WRAP_R, GL_REPEAT);
glTexParameteri(Target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(Target, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
if( FOpenGL::SupportsTextureFilterAnisotropic() )
{
glTexParameteri(Target, GL_TEXTURE_MAX_ANISOTROPY_EXT, 1);
}
glTexParameteri(Target, GL_TEXTURE_BASE_LEVEL, 0);
glTexParameteri(Target, GL_TEXTURE_MAX_LEVEL, NumMips - 1);
const bool bSRGB = (Flags&TexCreate_SRGB) != 0;
const FOpenGLTextureFormat& GLFormat = GOpenGLTextureFormats[Format];
if (GLFormat.InternalFormat[bSRGB] == GL_NONE)
{
UE_LOG(LogRHI, Fatal,TEXT("Texture format '%s' not supported."), GPixelFormats[Format].Name);
}
// Make sure PBO is disabled
CachedBindPixelUnpackBuffer(ContextState,0);
uint8* Data = CreateInfo.BulkData ? (uint8*)CreateInfo.BulkData->GetResourceBulkData() : NULL;
uint32 MipOffset = 0;
FOpenGL::TexStorage3D( Target, NumMips, GLFormat.InternalFormat[bSRGB], SizeX, SizeY, SizeZ, GLFormat.Format, GLFormat.Type );
if (Data)
{
for(uint32 MipIndex = 0; MipIndex < NumMips; MipIndex++)
{
FOpenGL::TexSubImage3D(
/*Target=*/ Target,
/*Level=*/ MipIndex,
0,
0,
0,
/*SizeX=*/ FMath::Max<uint32>(1,(SizeX >> MipIndex)),
/*SizeY=*/ FMath::Max<uint32>(1,(SizeY >> MipIndex)),
/*SizeZ=*/ FMath::Max<uint32>(1,(SizeZ >> MipIndex)),
/*Format=*/ GLFormat.Format,
/*Type=*/ GLFormat.Type,
/*Data=*/ Data ? &Data[MipOffset] : NULL
);
uint32 SysMemPitch = FMath::Max<uint32>(1,SizeX >> MipIndex) * GPixelFormats[Format].BlockBytes;
uint32 SysMemSlicePitch = FMath::Max<uint32>(1,SizeY >> MipIndex) * SysMemPitch;
MipOffset += FMath::Max<uint32>(1,SizeZ >> MipIndex) * SysMemSlicePitch;
}
}
// Determine the attachment point for the texture.
GLenum Attachment = GL_NONE;
if(Flags & TexCreate_RenderTargetable)
{
Attachment = GL_COLOR_ATTACHMENT0;
}
else if(Flags & TexCreate_DepthStencilTargetable)
{
Attachment = Format == PF_DepthStencil ? GL_DEPTH_STENCIL_ATTACHMENT : GL_DEPTH_ATTACHMENT;
}
else if(Flags & TexCreate_ResolveTargetable)
{
Attachment = (Format == PF_DepthStencil && FOpenGL::SupportsCombinedDepthStencilAttachment())
? GL_DEPTH_STENCIL_ATTACHMENT
: ((Format == PF_ShadowDepth || Format == PF_D24)
? GL_DEPTH_ATTACHMENT
: GL_COLOR_ATTACHMENT0);
}
FOpenGLTexture3D* Texture = new FOpenGLTexture3D(this,TextureID,Target,Attachment,SizeX,SizeY,SizeZ,NumMips,1,1, (EPixelFormat)Format,false,true,Flags,nullptr,CreateInfo.ClearValueBinding);
OpenGLTextureAllocated( Texture, Flags );
// No need to restore texture stage; leave it like this,
// and the next draw will take care of cleaning it up; or
// next operation that needs the stage will switch something else in on it.
return Texture;
}
void FOpenGLDynamicRHI::RHIGetResourceInfo(FTextureRHIParamRef Ref, FRHIResourceInfo& OutInfo)
{
}
FShaderResourceViewRHIRef FOpenGLDynamicRHI::RHICreateShaderResourceView(FTexture2DRHIParamRef Texture2DRHI, uint8 MipLevel)
{
FOpenGLTexture2D* Texture2D = ResourceCast(Texture2DRHI);
FOpenGLShaderResourceView *View = 0;
if (FOpenGL::SupportsTextureView())
{
VERIFY_GL_SCOPE();
GLuint Resource = 0;
FOpenGL::GenTextures( 1, &Resource);
const FOpenGLTextureFormat& GLFormat = GOpenGLTextureFormats[Texture2D->GetFormat()];
const bool bSRGB = (Texture2D->GetFlags()&TexCreate_SRGB) != 0;
FOpenGL::TextureView( Resource, Texture2D->Target, Texture2D->Resource, GLFormat.InternalFormat[bSRGB], MipLevel, 1, 0, 1);
View = new FOpenGLShaderResourceView(this, Resource, Texture2D->Target, MipLevel, true);
}
else
{
View = new FOpenGLShaderResourceView(this, Texture2D->Resource, Texture2D->Target, MipLevel, false);
}
FShaderCache::LogSRV(View, Texture2DRHI, MipLevel, Texture2DRHI->GetNumMips(), Texture2DRHI->GetFormat());
return View;
}
FShaderResourceViewRHIRef FOpenGLDynamicRHI::RHICreateShaderResourceView(FTexture2DRHIParamRef Texture2DRHI, uint8 MipLevel, uint8 NumMipLevels, uint8 Format)
{
FOpenGLTexture2D* Texture2D = ResourceCast(Texture2DRHI);
FOpenGLShaderResourceView *View = 0;
if (FOpenGL::SupportsTextureView())
{
VERIFY_GL_SCOPE();
GLuint Resource = 0;
FOpenGL::GenTextures( 1, &Resource);
if (Format != PF_X24_G8)
{
const FOpenGLTextureFormat& GLFormat = GOpenGLTextureFormats[Format];
const bool bSRGB = (Texture2D->GetFlags()&TexCreate_SRGB) != 0;
FOpenGL::TextureView( Resource, Texture2D->Target, Texture2D->Resource, GLFormat.InternalFormat[bSRGB], MipLevel, NumMipLevels, 0, 1);
}
else
{
// PF_X24_G8 doesn't correspond to a real format under OpenGL
// The solution is to create a view with the original format, and convert it to return the stencil index
// To match component locations, texture swizzle needs to be setup too
const FOpenGLTextureFormat& GLFormat = GOpenGLTextureFormats[Texture2D->GetFormat()];
// create a second depth/stencil view
FOpenGL::TextureView( Resource, Texture2D->Target, Texture2D->Resource, GLFormat.InternalFormat[0], MipLevel, NumMipLevels, 0, 1);
// Use a texture stage that's not likely to be used for draws, to avoid waiting
FOpenGLContextState& ContextState = GetContextStateForCurrentContext();
CachedSetupTextureStage(ContextState, FOpenGL::GetMaxCombinedTextureImageUnits() - 1, Texture2D->Target, Resource, 0, NumMipLevels);
//set the texture to return the stencil index, and then force the components to match D3D
glTexParameteri( Texture2D->Target, GL_DEPTH_STENCIL_TEXTURE_MODE, GL_STENCIL_INDEX);
glTexParameteri( Texture2D->Target, GL_TEXTURE_SWIZZLE_R, GL_ZERO);
glTexParameteri( Texture2D->Target, GL_TEXTURE_SWIZZLE_G, GL_RED);
glTexParameteri( Texture2D->Target, GL_TEXTURE_SWIZZLE_B, GL_ZERO);
glTexParameteri( Texture2D->Target, GL_TEXTURE_SWIZZLE_A, GL_ZERO);
}
View = new FOpenGLShaderResourceView(this, Resource, Texture2D->Target, MipLevel, true);
}
else
{
View = new FOpenGLShaderResourceView(this, Texture2D->Resource, Texture2D->Target, MipLevel, false);
}
FShaderCache::LogSRV(View, Texture2DRHI, MipLevel, NumMipLevels, Format);
return View;
}
FShaderResourceViewRHIRef FOpenGLDynamicRHI::RHICreateShaderResourceView(FTexture3DRHIParamRef Texture3DRHI, uint8 MipLevel)
{
FOpenGLTexture3D* Texture3D = ResourceCast(Texture3DRHI);
FOpenGLShaderResourceView *View = 0;
if (FOpenGL::SupportsTextureView())
{
VERIFY_GL_SCOPE();
GLuint Resource = 0;
FOpenGL::GenTextures( 1, &Resource);
const FOpenGLTextureFormat& GLFormat = GOpenGLTextureFormats[Texture3D->GetFormat()];
const bool bSRGB = (Texture3D->GetFlags()&TexCreate_SRGB) != 0;
FOpenGL::TextureView( Resource, Texture3D->Target, Texture3D->Resource, GLFormat.InternalFormat[bSRGB], MipLevel, 1, 0, 1);
View = new FOpenGLShaderResourceView(this, Resource, Texture3D->Target, MipLevel, true);
}
else
{
View = new FOpenGLShaderResourceView(this, Texture3D->Resource, Texture3D->Target, MipLevel, false);
}
FShaderCache::LogSRV(View, Texture3DRHI, MipLevel, Texture3DRHI->GetNumMips(), Texture3DRHI->GetFormat());
return View;
}
FShaderResourceViewRHIRef FOpenGLDynamicRHI::RHICreateShaderResourceView(FTexture2DArrayRHIParamRef Texture2DArrayRHI, uint8 MipLevel)
{
FOpenGLTexture2DArray* Texture2DArray = ResourceCast(Texture2DArrayRHI);
FOpenGLShaderResourceView *View = 0;
if (FOpenGL::SupportsTextureView())
{
VERIFY_GL_SCOPE();
GLuint Resource = 0;
FOpenGL::GenTextures( 1, &Resource);
const FOpenGLTextureFormat& GLFormat = GOpenGLTextureFormats[Texture2DArray->GetFormat()];
const bool bSRGB = (Texture2DArray->GetFlags()&TexCreate_SRGB) != 0;
FOpenGL::TextureView( Resource, Texture2DArray->Target, Texture2DArray->Resource, GLFormat.InternalFormat[bSRGB], MipLevel, 1, 0, 1);
View = new FOpenGLShaderResourceView(this, Resource, Texture2DArray->Target, MipLevel, true);
}
else
{
View = new FOpenGLShaderResourceView(this, Texture2DArray->Resource, Texture2DArray->Target, MipLevel, false);
}
FShaderCache::LogSRV(View, Texture2DArrayRHI, MipLevel, Texture2DArrayRHI->GetNumMips(), Texture2DArrayRHI->GetFormat());
return View;
}
FShaderResourceViewRHIRef FOpenGLDynamicRHI::RHICreateShaderResourceView(FTextureCubeRHIParamRef TextureCubeRHI, uint8 MipLevel)
{
FOpenGLTextureCube* TextureCube = ResourceCast(TextureCubeRHI);
FOpenGLShaderResourceView *View = 0;
if (FOpenGL::SupportsTextureView())
{
VERIFY_GL_SCOPE();
GLuint Resource = 0;
FOpenGL::GenTextures( 1, &Resource);
const FOpenGLTextureFormat& GLFormat = GOpenGLTextureFormats[TextureCube->GetFormat()];
const bool bSRGB = (TextureCube->GetFlags()&TexCreate_SRGB) != 0;
FOpenGL::TextureView( Resource, TextureCube->Target, TextureCube->Resource, GLFormat.InternalFormat[bSRGB], MipLevel, 1, 0, 1);
View = new FOpenGLShaderResourceView(this, Resource, TextureCube->Target, MipLevel, true);
}
else
{
View = new FOpenGLShaderResourceView(this, TextureCube->Resource, TextureCube->Target, MipLevel, false);
}
FShaderCache::LogSRV(View, TextureCube, MipLevel, TextureCubeRHI->GetNumMips(), TextureCubeRHI->GetFormat());
return View;
}
/** Generates mip maps for the surface. */
void FOpenGLDynamicRHI::RHIGenerateMips(FTextureRHIParamRef SurfaceRHI)
{
VERIFY_GL_SCOPE();
FOpenGLTextureBase* Texture = GetOpenGLTextureFromRHITexture(SurfaceRHI);
if ( FOpenGL::SupportsGenerateMipmap())
{
GPUProfilingData.RegisterGPUWork(0);
FOpenGLContextState& ContextState = GetContextStateForCurrentContext();
// Setup the texture on a disused unit
// need to figure out how to setup mips properly in no views case
CachedSetupTextureStage(ContextState, FOpenGL::GetMaxCombinedTextureImageUnits() - 1, Texture->Target, Texture->Resource, -1, 1);
FOpenGL::GenerateMipmap( Texture->Target);
}
else
{
UE_LOG( LogRHI, Fatal, TEXT("Generate Mipmaps unsupported on this OpenGL version"));
}
}
/**
* Computes the size in memory required by a given texture.
*
* @param TextureRHI - Texture we want to know the size of
* @return - Size in Bytes
*/
uint32 FOpenGLDynamicRHI::RHIComputeMemorySize(FTextureRHIParamRef TextureRHI)
{
if(!TextureRHI)
{
return 0;
}
FOpenGLTextureBase* Texture = GetOpenGLTextureFromRHITexture(TextureRHI);
return Texture->GetMemorySize();
}
/**
* Starts an asynchronous texture reallocation. It may complete immediately if the reallocation
* could be performed without any reshuffling of texture memory, or if there isn't enough memory.
* The specified status counter will be decremented by 1 when the reallocation is complete (success or failure).
*
* Returns a new reference to the texture, which will represent the new mip count when the reallocation is complete.
* RHIGetAsyncReallocateTexture2DStatus() can be used to check the status of an ongoing or completed reallocation.
*
* @param Texture2D - Texture to reallocate
* @param NewMipCount - New number of mip-levels
* @param RequestStatus - Will be decremented by 1 when the reallocation is complete (success or failure).
* @return - New reference to the texture, or an invalid reference upon failure
*/
FTexture2DRHIRef FOpenGLDynamicRHI::RHIAsyncReallocateTexture2D(FTexture2DRHIParamRef Texture2DRHI, int32 NewMipCount, int32 NewSizeX, int32 NewSizeY, FThreadSafeCounter* RequestStatus)
{
VERIFY_GL_SCOPE();
FOpenGLTexture2D* Texture2D = ResourceCast(Texture2DRHI);
// Allocate a new texture.
FOpenGLTexture2D* NewTexture2D = (FOpenGLTexture2D*)CreateOpenGLTexture(NewSizeX,NewSizeY,false,false, Texture2D->GetFormat(),NewMipCount,1,1, Texture2D->GetFlags(), Texture2DRHI->GetClearBinding());
const uint32 BlockSizeX = GPixelFormats[Texture2D->GetFormat()].BlockSizeX;
const uint32 BlockSizeY = GPixelFormats[Texture2D->GetFormat()].BlockSizeY;
const uint32 NumBytesPerBlock = GPixelFormats[Texture2D->GetFormat()].BlockBytes;
// Should we use client-storage to improve update time on platforms that require it
const bool bCompressed = GOpenGLTextureFormats[Texture2D->GetFormat()].bCompressed;
bool const bRenderable = (Texture2D->GetFlags() & (TexCreate_RenderTargetable|TexCreate_ResolveTargetable|TexCreate_DepthStencilTargetable)) != 0;
const bool bUseClientStorage = (FOpenGL::SupportsClientStorage() && !FOpenGL::SupportsTextureView() && !bRenderable && !bCompressed);
// Use the GPU to asynchronously copy the old mip-maps into the new texture.
const uint32 NumSharedMips = FMath::Min(Texture2D->GetNumMips(),NewTexture2D->GetNumMips());
const uint32 SourceMipOffset = Texture2D->GetNumMips() - NumSharedMips;
const uint32 DestMipOffset = NewTexture2D->GetNumMips() - NumSharedMips;
if (FOpenGL::SupportsCopyImage())
{
FOpenGLTexture2D *NewOGLTexture2D = (FOpenGLTexture2D*)NewTexture2D;
FOpenGLTexture2D *OGLTexture2D = (FOpenGLTexture2D*)Texture2D;
NewOGLTexture2D->CloneViaCopyImage( OGLTexture2D, NumSharedMips, SourceMipOffset, DestMipOffset);
}
else if (FOpenGL::SupportsCopyTextureLevels())
{
FOpenGL::CopyTextureLevels( NewTexture2D->Resource, Texture2D->Resource, SourceMipOffset, NumSharedMips);
}
else if (FOpenGL::SupportsPixelBuffers() && !bUseClientStorage)
{
FOpenGLTexture2D *NewOGLTexture2D = (FOpenGLTexture2D*)NewTexture2D;
FOpenGLTexture2D *OGLTexture2D = (FOpenGLTexture2D*)Texture2D;
NewOGLTexture2D->CloneViaPBO( OGLTexture2D, NumSharedMips, SourceMipOffset, DestMipOffset);
}
else
{
for(uint32 MipIndex = 0;MipIndex < NumSharedMips;++MipIndex)
{
const uint32 MipSizeX = FMath::Max<uint32>(1,NewSizeX >> (MipIndex+DestMipOffset));
const uint32 MipSizeY = FMath::Max<uint32>(1,NewSizeY >> (MipIndex+DestMipOffset));
const uint32 NumMipBlocks = Align(MipSizeX,BlockSizeX) / BlockSizeX * Align(MipSizeY,BlockSizeY) / BlockSizeY;
// Lock old and new texture.
uint32 SrcStride;
uint32 DestStride;
void* Src = RHILockTexture2D( Texture2D, MipIndex + SourceMipOffset, RLM_ReadOnly, SrcStride, false );
void* Dst = RHILockTexture2D( NewTexture2D, MipIndex + DestMipOffset, RLM_WriteOnly, DestStride, false );
check(SrcStride == DestStride);
FMemory::Memcpy( Dst, Src, NumMipBlocks * NumBytesPerBlock );
RHIUnlockTexture2D( Texture2D, MipIndex + SourceMipOffset, false );
RHIUnlockTexture2D( NewTexture2D, MipIndex + DestMipOffset, false );
}
}
// Decrement the thread-safe counter used to track the completion of the reallocation, since D3D handles sequencing the
// async mip copies with other D3D calls.
RequestStatus->Decrement();
return NewTexture2D;
}
/**
* Returns the status of an ongoing or completed texture reallocation:
* TexRealloc_Succeeded - The texture is ok, reallocation is not in progress.
* TexRealloc_Failed - The texture is bad, reallocation is not in progress.
* TexRealloc_InProgress - The texture is currently being reallocated async.
*
* @param Texture2D - Texture to check the reallocation status for
* @return - Current reallocation status
*/
ETextureReallocationStatus FOpenGLDynamicRHI::RHIFinalizeAsyncReallocateTexture2D( FTexture2DRHIParamRef Texture2D, bool bBlockUntilCompleted )
{
return TexRealloc_Succeeded;
}
/**
* Cancels an async reallocation for the specified texture.
* This should be called for the new texture, not the original.
*
* @param Texture Texture to cancel
* @param bBlockUntilCompleted If true, blocks until the cancellation is fully completed
* @return Reallocation status
*/
ETextureReallocationStatus FOpenGLDynamicRHI::RHICancelAsyncReallocateTexture2D( FTexture2DRHIParamRef Texture2D, bool bBlockUntilCompleted )
{
return TexRealloc_Succeeded;
}
void* FOpenGLDynamicRHI::RHILockTexture2D(FTexture2DRHIParamRef TextureRHI,uint32 MipIndex,EResourceLockMode LockMode,uint32& DestStride,bool bLockWithinMiptail)
{
FOpenGLTexture2D* Texture = ResourceCast(TextureRHI);
return Texture->Lock(MipIndex,0,LockMode,DestStride);
}
void FOpenGLDynamicRHI::RHIUnlockTexture2D(FTexture2DRHIParamRef TextureRHI,uint32 MipIndex,bool bLockWithinMiptail)
{
FOpenGLTexture2D* Texture = ResourceCast(TextureRHI);
Texture->Unlock(MipIndex, 0);
}
void* FOpenGLDynamicRHI::RHILockTexture2DArray(FTexture2DArrayRHIParamRef TextureRHI,uint32 TextureIndex,uint32 MipIndex,EResourceLockMode LockMode,uint32& DestStride,bool bLockWithinMiptail)
{
FOpenGLTexture2DArray* Texture = ResourceCast(TextureRHI);
return Texture->Lock(MipIndex,TextureIndex,LockMode,DestStride);
}
void FOpenGLDynamicRHI::RHIUnlockTexture2DArray(FTexture2DArrayRHIParamRef TextureRHI,uint32 TextureIndex,uint32 MipIndex,bool bLockWithinMiptail)
{
FOpenGLTexture2DArray* Texture = ResourceCast(TextureRHI);
Texture->Unlock(MipIndex, TextureIndex);
}
void FOpenGLDynamicRHI::RHIUpdateTexture2D(FTexture2DRHIParamRef TextureRHI,uint32 MipIndex,const FUpdateTextureRegion2D& UpdateRegion,uint32 SourcePitch,const uint8* SourceData)
{
VERIFY_GL_SCOPE();
FOpenGLTexture2D* Texture = ResourceCast(TextureRHI);
// Use a texture stage that's not likely to be used for draws, to avoid waiting
FOpenGLContextState& ContextState = GetContextStateForCurrentContext();
CachedSetupTextureStage(ContextState, FOpenGL::GetMaxCombinedTextureImageUnits() - 1, Texture->Target, Texture->Resource, 0, Texture->GetNumMips());
CachedBindPixelUnpackBuffer(ContextState, 0);
EPixelFormat PixelFormat = Texture->GetFormat();
check(GPixelFormats[PixelFormat].BlockSizeX == 1);
check(GPixelFormats[PixelFormat].BlockSizeY == 1);
const FOpenGLTextureFormat& GLFormat = GOpenGLTextureFormats[PixelFormat];
const uint32 FormatBPP = GPixelFormats[PixelFormat].BlockBytes;
checkf(!GLFormat.bCompressed, TEXT("RHIUpdateTexture2D not currently supported for compressed (%s) textures by the OpenGL RHI"), GPixelFormats[PixelFormat].Name);
glPixelStorei(GL_UNPACK_ROW_LENGTH, SourcePitch / FormatBPP);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glTexSubImage2D(Texture->Target, MipIndex, UpdateRegion.DestX, UpdateRegion.DestY, UpdateRegion.Width, UpdateRegion.Height,
GLFormat.Format, GLFormat.Type, SourceData);
glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
// No need to restore texture stage; leave it like this,
// and the next draw will take care of cleaning it up; or
// next operation that needs the stage will switch something else in on it.
}
void FOpenGLDynamicRHI::RHIUpdateTexture3D(FTexture3DRHIParamRef TextureRHI,uint32 MipIndex,const FUpdateTextureRegion3D& UpdateRegion,uint32 SourceRowPitch,uint32 SourceDepthPitch,const uint8* SourceData)
{
VERIFY_GL_SCOPE();
check( FOpenGL::SupportsTexture3D() );
FOpenGLTexture3D* Texture = ResourceCast(TextureRHI);
// Use a texture stage that's not likely to be used for draws, to avoid waiting
FOpenGLContextState& ContextState = GetContextStateForCurrentContext();
CachedSetupTextureStage(ContextState, FOpenGL::GetMaxCombinedTextureImageUnits() - 1, Texture->Target, Texture->Resource, 0, Texture->GetNumMips());
CachedBindPixelUnpackBuffer(ContextState, 0);
EPixelFormat PixelFormat = Texture->GetFormat();
check(GPixelFormats[PixelFormat].BlockSizeX == 1);
check(GPixelFormats[PixelFormat].BlockSizeY == 1);
// TO DO - add appropriate offsets to source data when necessary
check(UpdateRegion.SrcX == 0);
check(UpdateRegion.SrcY == 0);
check(UpdateRegion.SrcZ == 0);
const FOpenGLTextureFormat& GLFormat = GOpenGLTextureFormats[PixelFormat];
const uint32 FormatBPP = GPixelFormats[PixelFormat].BlockBytes;
checkf(!GLFormat.bCompressed, TEXT("RHIUpdateTexture3D not currently supported for compressed (%s) textures by the OpenGL RHI"), GPixelFormats[PixelFormat].Name);
glPixelStorei(GL_UNPACK_ROW_LENGTH, SourceRowPitch / FormatBPP);
check( SourceDepthPitch % ( FormatBPP * UpdateRegion.Width ) == 0 );
glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, SourceDepthPitch / UpdateRegion.Width / FormatBPP);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
FOpenGL::TexSubImage3D(Texture->Target, MipIndex, UpdateRegion.DestX, UpdateRegion.DestY, UpdateRegion.DestZ, UpdateRegion.Width, UpdateRegion.Height, UpdateRegion.Depth,
GLFormat.Format, GLFormat.Type, SourceData);
glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, 0);
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
// No need to restore texture stage; leave it like this,
// and the next draw will take care of cleaning it up; or
// next operation that needs the stage will switch something else in on it.
}
void FOpenGLDynamicRHI::InvalidateTextureResourceInCache(GLuint Resource)
{
for (int32 SamplerIndex = 0; SamplerIndex < FOpenGL::GetMaxCombinedTextureImageUnits(); ++SamplerIndex)
{
if (SharedContextState.Textures[SamplerIndex].Resource == Resource)
{
SharedContextState.Textures[SamplerIndex].Target = GL_NONE;
SharedContextState.Textures[SamplerIndex].Resource = 0;
}
if (RenderingContextState.Textures[SamplerIndex].Resource == Resource)
{
RenderingContextState.Textures[SamplerIndex].Target = GL_NONE;
RenderingContextState.Textures[SamplerIndex].Resource = 0;
}
}
}
void FOpenGLDynamicRHI::InvalidateUAVResourceInCache(GLuint Resource)
{
for (int32 UAVIndex = 0; UAVIndex < OGL_MAX_COMPUTE_STAGE_UAV_UNITS; ++UAVIndex)
{
if (SharedContextState.UAVs[UAVIndex].Resource == Resource)
{
SharedContextState.UAVs[UAVIndex].Format = GL_NONE;
SharedContextState.UAVs[UAVIndex].Resource = 0;
}
if (RenderingContextState.UAVs[UAVIndex].Resource == Resource)
{
RenderingContextState.UAVs[UAVIndex].Format = GL_NONE;
RenderingContextState.UAVs[UAVIndex].Resource = 0;
}
}
}
/*-----------------------------------------------------------------------------
Cubemap texture support.
-----------------------------------------------------------------------------*/
FTextureCubeRHIRef FOpenGLDynamicRHI::RHICreateTextureCube( uint32 Size, uint8 Format, uint32 NumMips, uint32 Flags, FRHIResourceCreateInfo& CreateInfo )
{
// not yet supported
check(!CreateInfo.BulkData);
return (FRHITextureCube*)CreateOpenGLTexture(Size,Size,true, false, Format, NumMips, 1, 1, Flags, CreateInfo.ClearValueBinding);
}
FTextureCubeRHIRef FOpenGLDynamicRHI::RHICreateTextureCubeArray( uint32 Size, uint32 ArraySize, uint8 Format, uint32 NumMips, uint32 Flags, FRHIResourceCreateInfo& CreateInfo )
{
// not yet supported
check(!CreateInfo.BulkData);
return (FRHITextureCube*)CreateOpenGLTexture(Size, Size, true, true, Format, NumMips, 1, 6 * ArraySize, Flags, CreateInfo.ClearValueBinding);
}
void* FOpenGLDynamicRHI::RHILockTextureCubeFace(FTextureCubeRHIParamRef TextureCubeRHI,uint32 FaceIndex,uint32 ArrayIndex,uint32 MipIndex,EResourceLockMode LockMode,uint32& DestStride,bool bLockWithinMiptail)
{
FOpenGLTextureCube* TextureCube = ResourceCast(TextureCubeRHI);
return TextureCube->Lock(MipIndex,FaceIndex + 6 * ArrayIndex,LockMode,DestStride);
}
void FOpenGLDynamicRHI::RHIUnlockTextureCubeFace(FTextureCubeRHIParamRef TextureCubeRHI,uint32 FaceIndex,uint32 ArrayIndex,uint32 MipIndex,bool bLockWithinMiptail)
{
FOpenGLTextureCube* TextureCube = ResourceCast(TextureCubeRHI);
TextureCube->Unlock(MipIndex,FaceIndex + ArrayIndex * 6);
}
void FOpenGLDynamicRHI::RHIBindDebugLabelName(FTextureRHIParamRef TextureRHI, const TCHAR* Name)
{
FOpenGLTextureBase* Texture = GetOpenGLTextureFromRHITexture(TextureRHI);
FOpenGL::LabelObject(GL_TEXTURE, Texture->Resource, TCHAR_TO_ANSI(Name));
}
void FOpenGLDynamicRHI::RHIVirtualTextureSetFirstMipInMemory(FTexture2DRHIParamRef TextureRHI, uint32 FirstMip)
{
}
void FOpenGLDynamicRHI::RHIVirtualTextureSetFirstMipVisible(FTexture2DRHIParamRef TextureRHI, uint32 FirstMip)
{
}
FTextureReferenceRHIRef FOpenGLDynamicRHI::RHICreateTextureReference(FLastRenderTimeContainer* InLastRenderTime)
{
return new FOpenGLTextureReference(InLastRenderTime);
}
void FOpenGLTextureReference::SetReferencedTexture(FRHITexture* InTexture)
{
FRHITextureReference::SetReferencedTexture(InTexture);
TexturePtr = GetOpenGLTextureFromRHITexture(InTexture);
}
void FOpenGLDynamicRHI::RHIUpdateTextureReference(FTextureReferenceRHIParamRef TextureRefRHI, FTextureRHIParamRef NewTextureRHI)
{
auto* TextureRef = (FOpenGLTextureReference*)TextureRefRHI;
if (TextureRef)
{
TextureRef->SetReferencedTexture(NewTextureRHI);
}
}
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