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66 lines
1.5 KiB
C++
66 lines
1.5 KiB
C++
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/*=========================================================================*\
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Copyright (c) Microsoft Corporation. All rights reserved.
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File: D2D1_2Helper.h
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Module Name: D2D
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Description: Helper files over the D2D interfaces and APIs.
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\*=========================================================================*/
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#ifdef _MSC_VER
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#pragma once
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#endif // _MSC_VER
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#ifndef _D2D1_2HELPER_H_
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#define _D2D1_2HELPER_H_
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#if NTDDI_VERSION >= NTDDI_WINBLUE
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#ifndef _D2D1_2_H_
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#include <d2d1_2.h>
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#endif // #ifndef _D2D1_2_H_
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#ifndef D2D_USE_C_DEFINITIONS
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#include <winapifamily.h>
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#pragma region Application Family
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#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
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namespace D2D1
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{
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COM_DECLSPEC_NOTHROW
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D2D1FORCEINLINE
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FLOAT
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ComputeFlatteningTolerance(
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_In_ CONST D2D1_MATRIX_3X2_F &matrix,
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FLOAT dpiX = 96.0f,
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FLOAT dpiY = 96.0f,
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FLOAT maxZoomFactor = 1.0f
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)
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{
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D2D1_MATRIX_3X2_F dpiDependentTransform =
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matrix * D2D1::Matrix3x2F::Scale(dpiX / 96.0f, dpiY / 96.0f);
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FLOAT absMaxZoomFactor = (maxZoomFactor > 0) ? maxZoomFactor : -maxZoomFactor;
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return D2D1_DEFAULT_FLATTENING_TOLERANCE /
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(absMaxZoomFactor * D2D1ComputeMaximumScaleFactor(&dpiDependentTransform));
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}
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} // namespace D2D1
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#endif /* WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP) */
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#pragma endregion
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#endif // #ifndef D2D_USE_C_DEFINITIONS
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#endif // #if NTDDI_VERSION >= NTDDI_WINBLUE
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#endif // #ifndef _D2D1_HELPER_H_
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