void FSlateElementIndexBuffer::FillBuffer( const TArray<SlateIndex>& InIndices, bool bShrinkToFit )
{
check( IsInRenderingThread() );
if( InIndices.Num() )
{
uint32 NumIndices = InIndices.Num();
uint32 RequiredBufferSize = NumIndices*sizeof(SlateIndex);
// resize if needed
if( RequiredBufferSize > GetBufferSize() || bShrinkToFit )
{
// Use array resize techniques for the vertex buffer
ResizeBuffer( InIndices.GetAllocatedSize() );
}
BufferUsageSize += RequiredBufferSize;
void* IndicesPtr = RHILockIndexBuffer( IndexBufferRHI, 0, RequiredBufferSize, RLM_WriteOnly );
FMemory::Memcpy( IndicesPtr, InIndices.GetData(), RequiredBufferSize );
RHIUnlockIndexBuffer(IndexBufferRHI);
}
}
void FRawIndexBuffer16or32::InitRHI()
{
uint32 Size = Indices.Num() * sizeof(uint32);
if( Size > 0 )
{
// Create the index buffer.
FRHIResourceCreateInfo CreateInfo;
IndexBufferRHI = RHICreateIndexBuffer(sizeof(uint32),Size,BUF_Static,CreateInfo);
// Initialize the buffer.
void* Buffer = RHILockIndexBuffer(IndexBufferRHI, 0, Size, RLM_WriteOnly);
FMemory::Memcpy(Buffer,Indices.GetData(),Size);
RHIUnlockIndexBuffer(IndexBufferRHI);
}
// BSP sample debugging requires CPU access to index buffers
#if !ALLOW_LIGHTMAP_SAMPLE_DEBUGGING
// Undo/redo can destroy and recreate the render resources for UModels without rebuilding the
// buffers, so the indices need to be saved when in the editor.
if (!GIsEditor && !IsRunningCommandlet())
{
Indices.Empty();
}
#endif
}
void FStreetMapIndexBuffer::InitRHI()
{
const int IndexCount = FMath::Max( Indices16.Num(), Indices32.Num() );
if( IndexCount > 0 )
{
const bool b32BitIndices = Indices32.Num() > Indices16.Num();
const uint8 IndexSize = b32BitIndices ? sizeof( Indices32[ 0 ] ) : sizeof( Indices16[ 0 ] );
const void* IndexSourceData;
if( b32BitIndices )
{
IndexSourceData = Indices32.GetData();
}
else
{
IndexSourceData = Indices16.GetData();
}
// Allocate our index buffer and load it with data
FRHIResourceCreateInfo CreateInfo;
IndexBufferRHI = RHICreateIndexBuffer( IndexSize, IndexCount * IndexSize, BUF_Static, CreateInfo );
void* IndexBufferData = RHILockIndexBuffer( IndexBufferRHI, 0, IndexCount * IndexSize, RLM_WriteOnly );
FMemory::Memcpy( IndexBufferData, IndexSourceData, IndexCount * IndexSize );
RHIUnlockIndexBuffer( IndexBufferRHI );
}
}
void UpdateRenderData() const
{
// Copy the index data into the indices buffer
void* Buffer = RHILockIndexBuffer(IndexBufferRHI, 0, Indices.Num() * sizeof(int32), RLM_WriteOnly);
FMemory::Memcpy(Buffer, Indices.GetData(), Indices.Num() * sizeof(int32));
RHIUnlockIndexBuffer(IndexBufferRHI);
}
virtual void InitRHI() override
{
const uint32 Size = sizeof(uint16) * 6 * 8;
const uint32 Stride = sizeof(uint16);
FRHIResourceCreateInfo CreateInfo;
IndexBufferRHI = RHICreateIndexBuffer( Stride, Size, BUF_Static, CreateInfo );
uint16* Indices = (uint16*)RHILockIndexBuffer( IndexBufferRHI, 0, Size, RLM_WriteOnly );
for (uint32 SpriteIndex = 0; SpriteIndex < 8; ++SpriteIndex)
{
#if PLATFORM_MAC // Avoid a driver bug on OSX/NV cards that causes driver to generate an unwound index buffer
Indices[SpriteIndex*6 + 0] = SpriteIndex*6 + 0;
Indices[SpriteIndex*6 + 1] = SpriteIndex*6 + 1;
Indices[SpriteIndex*6 + 2] = SpriteIndex*6 + 2;
Indices[SpriteIndex*6 + 3] = SpriteIndex*6 + 3;
Indices[SpriteIndex*6 + 4] = SpriteIndex*6 + 4;
Indices[SpriteIndex*6 + 5] = SpriteIndex*6 + 5;
#else
Indices[SpriteIndex*6 + 0] = SpriteIndex*4 + 0;
Indices[SpriteIndex*6 + 1] = SpriteIndex*4 + 3;
Indices[SpriteIndex*6 + 2] = SpriteIndex*4 + 2;
Indices[SpriteIndex*6 + 3] = SpriteIndex*4 + 0;
Indices[SpriteIndex*6 + 4] = SpriteIndex*4 + 1;
Indices[SpriteIndex*6 + 5] = SpriteIndex*4 + 3;
#endif
}
RHIUnlockIndexBuffer( IndexBufferRHI );
}
virtual void InitRHI()
{
IndexBufferRHI = RHICreateIndexBuffer(sizeof(int32), Indices.Num() * sizeof(int32), NULL, BUF_Static);
// Write the indices to the index buffer.
void* Buffer = RHILockIndexBuffer(IndexBufferRHI, 0, Indices.Num() * sizeof(int32), RLM_WriteOnly);
FMemory::Memcpy(Buffer, Indices.GetTypedData(), Indices.Num() * sizeof(int32));
RHIUnlockIndexBuffer(IndexBufferRHI);
}
virtual void InitRHI() override
{
FRHIResourceCreateInfo CreateInfo;
IndexBufferRHI = RHICreateIndexBuffer(sizeof(int32), Indices.Num() * sizeof(int32), BUF_Static, CreateInfo);
// Write the indices to the index buffer.
void* Buffer = RHILockIndexBuffer(IndexBufferRHI, 0, Indices.Num() * sizeof(int32), RLM_WriteOnly);
FMemory::Memcpy(Buffer, Indices.GetData(), Indices.Num() * sizeof(int32));
RHIUnlockIndexBuffer(IndexBufferRHI);
}
void InitRHI()
{
FRHIResourceCreateInfo CreateInfo;
IndexBufferRHI = RHICreateIndexBuffer(sizeof(uint16), Indices.Num() * sizeof(uint16), BUF_Static, CreateInfo);
// Copy the index data into the index buffer.
void* Buffer = RHILockIndexBuffer(IndexBufferRHI, 0, Indices.Num() * sizeof(uint16), RLM_WriteOnly);
FMemory::Memcpy(Buffer, Indices.GetData(), Indices.Num() * sizeof(uint16));
RHIUnlockIndexBuffer(IndexBufferRHI);
}
virtual void InitRHI() override
{
#if ENGINE_MAJOR_VERSION >= 4 && ENGINE_MINOR_VERSION >= 3
FRHIResourceCreateInfo CreateInfo;
IndexBufferRHI = RHICreateIndexBuffer(sizeof(int32), Indices.Num() * sizeof(int32), BUF_Static, CreateInfo);
#else
IndexBufferRHI = RHICreateIndexBuffer(sizeof(int32), Indices.Num() * sizeof(int32), NULL, BUF_Static);
#endif
// Write the indices to the index buffer.
void* Buffer = RHILockIndexBuffer(IndexBufferRHI, 0, Indices.Num() * sizeof(int32), RLM_WriteOnly);
FMemory::Memcpy(Buffer, Indices.GetData(), Indices.Num() * sizeof(int32));
RHIUnlockIndexBuffer(IndexBufferRHI);
}
void FRawIndexBuffer::InitRHI()
{
uint32 Size = Indices.Num() * sizeof(uint16);
if( Size > 0 )
{
// Create the index buffer.
FRHIResourceCreateInfo CreateInfo;
IndexBufferRHI = RHICreateIndexBuffer(sizeof(uint16),Size,BUF_Static,CreateInfo);
// Initialize the buffer.
void* Buffer = RHILockIndexBuffer(IndexBufferRHI, 0, Size, RLM_WriteOnly);
FMemory::Memcpy(Buffer,Indices.GetData(),Size);
RHIUnlockIndexBuffer(IndexBufferRHI);
}
}
//
// IndexBuffer
//
void FSsPartsIndexBuffer::InitRHI()
{
if(0 < NumIndices)
{
FRHIResourceCreateInfo CreateInfo;
IndexBufferRHI = RHICreateIndexBuffer(sizeof(uint32), NumIndices * sizeof(uint32), BUF_Dynamic, CreateInfo);
void* IndicesPtr = RHILockIndexBuffer(IndexBufferRHI, 0, NumIndices * sizeof(uint32), RLM_WriteOnly);
for(uint32 i = 0; i < NumIndices/6; ++i)
{
((uint32*)IndicesPtr)[i*6+0] = i*4+0;
((uint32*)IndicesPtr)[i*6+1] = i*4+1;
((uint32*)IndicesPtr)[i*6+2] = i*4+3;
((uint32*)IndicesPtr)[i*6+3] = i*4+0;
((uint32*)IndicesPtr)[i*6+4] = i*4+3;
((uint32*)IndicesPtr)[i*6+5] = i*4+2;
}
RHIUnlockIndexBuffer(IndexBufferRHI);
}
}
/**
* Creates an index buffer for drawing an individual sprite.
*/
void FParticleIndexBuffer::InitRHI()
{
// Instanced path needs only MAX_PARTICLES_PER_INSTANCE,
// but using the maximum needed for the non-instanced path
// in prep for future flipping of both instanced and non-instanced at runtime.
const uint32 MaxParticles = 65536 / 4;
const uint32 Size = sizeof(uint16) * 6 * MaxParticles;
const uint32 Stride = sizeof(uint16);
IndexBufferRHI = RHICreateIndexBuffer( Stride, Size, NULL, BUF_Static );
uint16* Indices = (uint16*)RHILockIndexBuffer( IndexBufferRHI, 0, Size, RLM_WriteOnly );
for (uint32 SpriteIndex = 0; SpriteIndex < MaxParticles; ++SpriteIndex)
{
Indices[SpriteIndex*6 + 0] = SpriteIndex*4 + 0;
Indices[SpriteIndex*6 + 1] = SpriteIndex*4 + 2;
Indices[SpriteIndex*6 + 2] = SpriteIndex*4 + 3;
Indices[SpriteIndex*6 + 3] = SpriteIndex*4 + 0;
Indices[SpriteIndex*6 + 4] = SpriteIndex*4 + 1;
Indices[SpriteIndex*6 + 5] = SpriteIndex*4 + 2;
}
RHIUnlockIndexBuffer( IndexBufferRHI );
}
FIndexBufferRHIRef FEmptyDynamicRHI::RHICreateIndexBuffer(uint32 Stride, uint32 Size, uint32 InUsage, FRHIResourceCreateInfo& CreateInfo)
{
// make the RHI object, which will allocate memory
FEmptyIndexBuffer* IndexBuffer = new FEmptyIndexBuffer(Stride, Size, InUsage);
if(CreateInfo.ResourceArray)
{
check(Size == CreateInfo.ResourceArray->GetResourceDataSize());
// make a buffer usable by CPU
void* Buffer = RHILockIndexBuffer(IndexBuffer, 0, Size, RLM_WriteOnly);
// copy the contents of the given data into the buffer
FMemory::Memcpy(Buffer, CreateInfo.ResourceArray->GetResourceData(), Size);
RHIUnlockIndexBuffer(IndexBuffer);
// Discard the resource array's contents.
CreateInfo.ResourceArray->Discard();
}
return IndexBuffer;
}
void* FSlateElementIndexBuffer::LockBuffer_RenderThread(int32 NumIndices)
{
uint32 RequiredBufferSize = NumIndices*sizeof(SlateIndex);
return RHILockIndexBuffer( IndexBufferRHI, 0, RequiredBufferSize, RLM_WriteOnly );
}
void AddElements(TArray<int32> &Elements)
{
int32* IndexBufferData = (int32*)RHILockIndexBuffer(IndexBufferRHI, 0, BOSize * sizeof(int32), RLM_WriteOnly);
FMemory::Memcpy(IndexBufferData, &Elements[0], Elements.Num() * sizeof(int32));
RHIUnlockIndexBuffer(IndexBufferRHI);
}