37 lines
1.1 KiB
C++
37 lines
1.1 KiB
C++
/**
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* This file has no copyright assigned and is placed in the Public Domain.
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* This file is part of the mingw-w64 runtime package.
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* No warranty is given; refer to the file DISCLAIMER.PD within this package.
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*/
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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
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#ifndef D2D_USE_C_DEFINITIONS
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#include <winapifamily.h>
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#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
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namespace D2D1 {
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COM_DECLSPEC_NOTHROW D2D1FORCEINLINE FLOAT ComputeFlatteningTolerance(const D2D1_MATRIX_3X2_F &matrix, FLOAT dpi_x = 96.0f, FLOAT dpi_y = 96.0f, FLOAT max_zoom_factor = 1.0f) {
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D2D1_MATRIX_3X2_F transform = matrix * D2D1::Matrix3x2F::Scale(dpi_x / 96.0f, dpi_y / 96.0f);
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FLOAT abs_max_zoom_factor = (max_zoom_factor > 0) ? max_zoom_factor : -max_zoom_factor;
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return D2D1_DEFAULT_FLATTENING_TOLERANCE / (abs_max_zoom_factor * D2D1ComputeMaximumScaleFactor(&transform));
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}
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}
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#endif /* WINAPI_PARTITION_APP */
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#endif /* D2D_USE_C_DEFINITIONS */
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#endif /* NTDDI_VERSION >= NTDDI_WINBLUE */
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#endif /* _D2D1_HELPER_H_ */
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