void *BufferStorage11::PackStorage11::map(GLbitfield access)
{
// TODO: fast path
// We might be able to optimize out one or more memcpy calls by detecting when
// and if D3D packs the staging texture memory identically to how we would fill
// the pack buffer according to the current pack state.
flushQueuedPackCommand();
mDataModified = (mDataModified || (access & GL_MAP_WRITE_BIT) != 0);
return &mMemoryBuffer[0];
}
uint8_t *Buffer11::PackStorage::map(size_t offset, size_t length, GLbitfield access)
{
ASSERT(offset + length <= getSize());
// TODO: fast path
// We might be able to optimize out one or more memcpy calls by detecting when
// and if D3D packs the staging texture memory identically to how we would fill
// the pack buffer according to the current pack state.
gl::Error error = flushQueuedPackCommand();
if (error.isError())
{
return NULL;
}
mDataModified = (mDataModified || (access & GL_MAP_WRITE_BIT) != 0);
return mMemoryBuffer.data() + offset;
}
void BufferStorage11::PackStorage11::packPixels(ID3D11Texture2D *srcTexure, UINT srcSubresource, const PackPixelsParams ¶ms)
{
flushQueuedPackCommand();
mQueuedPackCommand = new PackPixelsParams(params);
D3D11_TEXTURE2D_DESC textureDesc;
srcTexure->GetDesc(&textureDesc);
if (mStagingTexture != NULL &&
(mTextureFormat != textureDesc.Format ||
mTextureSize.width != params.area.width ||
mTextureSize.height != params.area.height))
{
SafeRelease(mStagingTexture);
mTextureSize.width = 0;
mTextureSize.height = 0;
mTextureFormat = DXGI_FORMAT_UNKNOWN;
}
if (mStagingTexture == NULL)
{
ID3D11Device *device = mRenderer->getDevice();
HRESULT hr;
mTextureSize.width = params.area.width;
mTextureSize.height = params.area.height;
mTextureFormat = textureDesc.Format;
D3D11_TEXTURE2D_DESC stagingDesc;
stagingDesc.Width = params.area.width;
stagingDesc.Height = params.area.height;
stagingDesc.MipLevels = 1;
stagingDesc.ArraySize = 1;
stagingDesc.Format = mTextureFormat;
stagingDesc.SampleDesc.Count = 1;
stagingDesc.SampleDesc.Quality = 0;
stagingDesc.Usage = D3D11_USAGE_STAGING;
stagingDesc.BindFlags = 0;
stagingDesc.CPUAccessFlags = D3D11_CPU_ACCESS_READ;
stagingDesc.MiscFlags = 0;
hr = device->CreateTexture2D(&stagingDesc, NULL, &mStagingTexture);
ASSERT(SUCCEEDED(hr));
}
if (textureDesc.SampleDesc.Count > 1)
{
UNIMPLEMENTED();
}
ID3D11DeviceContext *immediateContext = mRenderer->getDeviceContext();
D3D11_BOX srcBox;
srcBox.left = params.area.x;
srcBox.right = params.area.x + params.area.width;
srcBox.top = params.area.y;
srcBox.bottom = params.area.y + params.area.height;
srcBox.front = 0;
srcBox.back = 1;
// Asynchronous copy
immediateContext->CopySubresourceRegion(mStagingTexture, 0, 0, 0, 0, srcTexure, srcSubresource, &srcBox);
}
gl::Error Buffer11::PackStorage::packPixels(ID3D11Texture2D *srcTexure, UINT srcSubresource, const PackPixelsParams ¶ms)
{
gl::Error error = flushQueuedPackCommand();
if (error.isError())
{
return error;
}
mQueuedPackCommand = new PackPixelsParams(params);
D3D11_TEXTURE2D_DESC textureDesc;
srcTexure->GetDesc(&textureDesc);
if (mStagingTexture != NULL &&
(mTextureFormat != textureDesc.Format ||
mTextureSize.width != params.area.width ||
mTextureSize.height != params.area.height))
{
SafeRelease(mStagingTexture);
mTextureSize.width = 0;
mTextureSize.height = 0;
mTextureFormat = DXGI_FORMAT_UNKNOWN;
}
if (mStagingTexture == NULL)
{
ID3D11Device *device = mRenderer->getDevice();
HRESULT hr;
mTextureSize.width = params.area.width;
mTextureSize.height = params.area.height;
mTextureFormat = textureDesc.Format;
D3D11_TEXTURE2D_DESC stagingDesc;
stagingDesc.Width = params.area.width;
stagingDesc.Height = params.area.height;
stagingDesc.MipLevels = 1;
stagingDesc.ArraySize = 1;
stagingDesc.Format = mTextureFormat;
stagingDesc.SampleDesc.Count = 1;
stagingDesc.SampleDesc.Quality = 0;
stagingDesc.Usage = D3D11_USAGE_STAGING;
stagingDesc.BindFlags = 0;
stagingDesc.CPUAccessFlags = D3D11_CPU_ACCESS_READ;
stagingDesc.MiscFlags = 0;
hr = device->CreateTexture2D(&stagingDesc, NULL, &mStagingTexture);
if (FAILED(hr))
{
ASSERT(hr == E_OUTOFMEMORY);
return gl::Error(GL_OUT_OF_MEMORY, "Failed to allocate internal staging texture.");
}
}
// ReadPixels from multisampled FBOs isn't supported in current GL
ASSERT(textureDesc.SampleDesc.Count <= 1);
ID3D11DeviceContext *immediateContext = mRenderer->getDeviceContext();
D3D11_BOX srcBox;
srcBox.left = params.area.x;
srcBox.right = params.area.x + params.area.width;
srcBox.top = params.area.y;
srcBox.bottom = params.area.y + params.area.height;
srcBox.front = 0;
srcBox.back = 1;
// Asynchronous copy
immediateContext->CopySubresourceRegion(mStagingTexture, 0, 0, 0, 0, srcTexure, srcSubresource, &srcBox);
return gl::Error(GL_NO_ERROR);
}
