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Code Issues Releases Wiki Activity

Gfx: Fix clipping with D2D when a transformation has been applied

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This commit is contained in:
Birunthan Mohanathas
2013-08-10 16:58:30 +03:00
parent 42e8d5ee22
commit b8333dc66d
1 changed files with 28 additions and 8 deletions
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36
Common/Gfx/CanvasD2D.cpp
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@@ -315,7 +315,9 @@ void CanvasD2D::DrawTextW(const WCHAR* str, UINT strLen, const TextFormat& forma
formatD2D.CreateLayout(
str, strLen, rect.Width, rect.Height, !m_AccurateText && m_TextAntiAliasing);
const float xPos = [&]()
D2D1_POINT_2F drawPosition;
drawPosition.y = rect.Y - formatD2D.m_LineGap;
drawPosition.x = [&]()
{
if (!m_AccurateText)
{
@@ -330,15 +332,33 @@ void CanvasD2D::DrawTextW(const WCHAR* str, UINT strLen, const TextFormat& forma
return rect.X;
} ();
// TODO: Check for transformation.
m_Target->PushAxisAlignedClip(ToRectF(rect), D2D1_ANTIALIAS_MODE_ALIASED);
D2D1::Matrix3x2F transformMatrix;
m_Target->GetTransform(&transformMatrix);
const bool identityTransform = transformMatrix.IsIdentity();
m_Target->DrawTextLayout(
D2D1::Point2F(xPos, rect.Y - formatD2D.m_LineGap),
formatD2D.m_TextLayout.Get(),
solidBrush.Get());
// TODO: Determine if we can avoid clipping.
D2D1_RECT_F clipRect = ToRectF(rect);
if (identityTransform)
{
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->PopAxisAlignedClip();
m_Target->DrawTextLayout(drawPosition, formatD2D.m_TextLayout.Get(), solidBrush.Get());
if (identityTransform)
{
m_Target->PopAxisAlignedClip();
}
else
{
m_Target->PopLayer();
}
}
}