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Code Issues Releases Wiki Activity

Gfx: Avoid clipping with D2D when not needed

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This commit is contained in:
Birunthan Mohanathas
2013-08-12 18:50:24 +03:00
parent a8467674fe
commit 12e0564f3e
4 changed files with 47 additions and 35 deletions
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68
Common/Gfx/CanvasD2D.cpp
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@ -52,7 +52,8 @@ Microsoft::WRL::ComPtr<IWICImagingFactory> CanvasD2D::c_WICFactory;
CanvasD2D::CanvasD2D() : Canvas(),
m_Bitmap(),
m_TextAntiAliasing(false)
m_TextAntiAliasing(false),
m_CanUseAxisAlignClip(false)
{
}
@ -169,8 +170,8 @@ bool CanvasD2D::BeginTargetDraw()
m_Target->BeginDraw();
// Apply any transforms that occurred before creation of m_Target
m_Target->SetTransform(GetCurrentTransform());
// Apply any transforms that occurred before creation of |m_Target|.
UpdateTargetTransform();
return true;
}
@ -227,13 +228,18 @@ bool CanvasD2D::IsTransparentPixel(int x, int y)
return transparent;
}
D2D1_MATRIX_3X2_F CanvasD2D::GetCurrentTransform()
void CanvasD2D::UpdateTargetTransform()
{
D2D1_MATRIX_3X2_F d2dMatrix;
Gdiplus::Matrix gdipMatrix;
m_GdipGraphics->GetTransform(&gdipMatrix);
D2D1_MATRIX_3X2_F d2dMatrix;
gdipMatrix.GetElements((Gdiplus::REAL*)&d2dMatrix);
return d2dMatrix;
m_Target->SetTransform(d2dMatrix);
m_CanUseAxisAlignClip =
d2dMatrix._12 == 0.0f && d2dMatrix._21 == 0.0f &&
d2dMatrix._31 == 0.0f && d2dMatrix._32 == 0.0f;
}
void CanvasD2D::SetTransform(const Gdiplus::Matrix& matrix)
@ -242,7 +248,7 @@ void CanvasD2D::SetTransform(const Gdiplus::Matrix& matrix)
if (m_Target)
{
m_Target->SetTransform(GetCurrentTransform());
UpdateTargetTransform();
}
}
@ -264,7 +270,7 @@ void CanvasD2D::RotateTransform(float angle, float x, float y, float dx, float d
if (m_Target)
{
m_Target->SetTransform(GetCurrentTransform());
UpdateTargetTransform();
}
}
@ -344,36 +350,34 @@ void CanvasD2D::DrawTextW(const WCHAR* str, UINT strLen, const TextFormat& forma
return yPos;
} ();
DWRITE_OVERHANG_METRICS overhangMetrics;
formatD2D.m_TextLayout->GetOverhangMetrics(&overhangMetrics);
D2D1::Matrix3x2F transformMatrix;
m_Target->GetTransform(&transformMatrix);
const bool identityTransform = transformMatrix.IsIdentity();
// TODO: Determine if we can avoid clipping.
D2D1_RECT_F clipRect = ToRectF(rect);
clipRect.bottom += ceil(overhangMetrics.bottom);
if (identityTransform)
if (formatD2D.m_Trimming)
{
m_Target->PushAxisAlignedClip(clipRect, D2D1_ANTIALIAS_MODE_ALIASED);
}
else
{
const D2D1_LAYER_PARAMETERS layerParams =
D2D1::LayerParameters(clipRect, nullptr, D2D1_ANTIALIAS_MODE_ALIASED);
m_Target->PushLayer(layerParams, nullptr);
D2D1_RECT_F clipRect = ToRectF(rect);
if (m_CanUseAxisAlignClip)
{
m_Target->PushAxisAlignedClip(clipRect, D2D1_ANTIALIAS_MODE_ALIASED);
}
else
{
const D2D1_LAYER_PARAMETERS layerParams =
D2D1::LayerParameters(clipRect, nullptr, D2D1_ANTIALIAS_MODE_ALIASED);
m_Target->PushLayer(layerParams, nullptr);
}
}
m_Target->DrawTextLayout(drawPosition, formatD2D.m_TextLayout.Get(), solidBrush.Get());
if (identityTransform)
if (formatD2D.m_Trimming)
{
m_Target->PopAxisAlignedClip();
}
else
{
m_Target->PopLayer();
if (m_CanUseAxisAlignClip)
{
m_Target->PopAxisAlignedClip();
}
else
{
m_Target->PopLayer();
}
}
}
}