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GetViewportTransform made a public method for SpriteBatch #643

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GetViewportTransform made a public method for SpriteBatch #643

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fcec1c5
GetViewportTransform made a public method for SpriteBatch
walbourn Jun 6, 2026
ab633c9
Minor code review
walbourn Jun 6, 2026
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3 changes: 3 additions & 0 deletions Inc/SpriteBatch.h
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Original file line number Diff line number Diff line change
Expand Up @@ -135,6 +135,9 @@ namespace DirectX
// Set viewport for sprite transformation
DIRECTX_TOOLKIT_API void __cdecl SetViewport(const D3D11_VIEWPORT& viewPort);

// Gets transform matrix based on viewport (which may be read from the device context) and rotation mode
DIRECTX_TOOLKIT_API void GetViewportTransform(_In_ ID3D11DeviceContext* deviceContext, XMMATRIX& transformMatrix) const;

private:
// Private implementation.
struct Impl;
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10 changes: 9 additions & 1 deletion Src/SpriteBatch.cpp
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Expand Up @@ -109,6 +109,8 @@ XM_ALIGNED_STRUCT(16) SpriteBatch::Impl : public AlignedNew<SpriteBatch::Impl>
bool mSetViewport;
D3D11_VIEWPORT mViewPort;

XMMATRIX GetViewportTransform(_In_ ID3D11DeviceContext* deviceContext, DXGI_MODE_ROTATION rotation);

private:
// Implementation helper methods.
void GrowSpriteQueue();
Expand All @@ -125,7 +127,6 @@ XM_ALIGNED_STRUCT(16) SpriteBatch::Impl : public AlignedNew<SpriteBatch::Impl>
FXMVECTOR inverseTextureSize);

static XMVECTOR GetTextureSize(_In_ ID3D11ShaderResourceView* texture);
XMMATRIX GetViewportTransform(_In_ ID3D11DeviceContext* deviceContext, DXGI_MODE_ROTATION rotation);


// Constants.
Expand Down Expand Up @@ -1192,3 +1193,10 @@ void SpriteBatch::SetViewport(const D3D11_VIEWPORT& viewPort)
pImpl->mSetViewport = true;
pImpl->mViewPort = viewPort;
}


_Use_decl_annotations_
void SpriteBatch::GetViewportTransform(ID3D11DeviceContext* deviceContext, XMMATRIX& transformMatrix) const
{
transformMatrix = pImpl->GetViewportTransform(deviceContext, pImpl->mRotation);
}
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