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Fix setting rectangular clipping region for Direct2D

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If transformation matrix of wxGraphicsContext with Direct2D renderer is e.g. rotated then rectangular clipping region represented by layer created with ID2D1RenderTarget::PushAxisAlignedClip is invalid because this kind of layers create axis-aligned clipping regions which edges are always horizontal or vertical (not e.g. rotated).
To take into account current transformation matrix when clipping region is set there is necessary to represent all clipping regions (even rectangular) by generic layers (ID2D1Layer) created with ID2D1RenderTarget::CreateLayer.

Closes #17622
This commit is contained in:
Artur Wieczorek
2016-08-09 20:47:56 +02:00
parent 85c9e06a29
commit c468dd67cb
1 changed files with 26 additions and 61 deletions
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87
src/msw/graphicsd2d.cpp
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@@ -3409,10 +3409,11 @@ private:
ID2D1RenderTarget* GetRenderTarget() const;
void SetClipLayer(ID2D1Geometry* clipGeometry);
private:
enum LayerType
{
CLIP_AXIS_ALIGNED_RECT,
CLIP_LAYER,
OTHER_LAYER
};
@@ -3509,16 +3510,9 @@ wxD2DContext::~wxD2DContext()
LayerData ld = m_layers.top();
m_layers.pop();
if ( ld.type == CLIP_AXIS_ALIGNED_RECT )
{
GetRenderTarget()->PopAxisAlignedClip();
}
else
{
GetRenderTarget()->PopLayer();
ld.layer.reset();
ld.geometry.reset();
}
GetRenderTarget()->PopLayer();
ld.layer.reset();
ld.geometry.reset();
}
HRESULT result = GetRenderTarget()->EndDraw();
@@ -3536,13 +3530,29 @@ void wxD2DContext::Clip(const wxRegion& region)
{
wxCOMPtr<ID2D1Geometry> clipGeometry = wxD2DConvertRegionToGeometry(m_direct2dFactory, region);
SetClipLayer(clipGeometry);
}
void wxD2DContext::Clip(wxDouble x, wxDouble y, wxDouble w, wxDouble h)
{
wxCOMPtr<ID2D1RectangleGeometry> clipGeometry;
HRESULT hr = m_direct2dFactory->CreateRectangleGeometry(
D2D1::RectF(x, y, x + w, y + h), &clipGeometry);
wxCHECK_HRESULT_RET(hr);
SetClipLayer(clipGeometry);
}
void wxD2DContext::SetClipLayer(ID2D1Geometry* clipGeometry)
{
wxCOMPtr<ID2D1Layer> clipLayer;
HRESULT hr = GetRenderTarget()->CreateLayer(&clipLayer);
wxCHECK_HRESULT_RET(hr);
LayerData ld;
ld.type = CLIP_LAYER;
ld.params = D2D1::LayerParameters(D2D1::InfiniteRect(), clipGeometry);
ld.params = D2D1::LayerParameters(D2D1::InfiniteRect(), clipGeometry,
wxD2DConvertAntialiasMode(m_antialias));
ld.layer = clipLayer;
ld.geometry = clipGeometry;
@@ -3551,19 +3561,6 @@ void wxD2DContext::Clip(const wxRegion& region)
m_layers.push(ld);
}
void wxD2DContext::Clip(wxDouble x, wxDouble y, wxDouble w, wxDouble h)
{
LayerData ld;
ld.type = CLIP_AXIS_ALIGNED_RECT;
ld.params = D2D1::LayerParameters(D2D1::RectF(x, y, x + w, y + h),
NULL, D2D1_ANTIALIAS_MODE_ALIASED);
GetRenderTarget()->PushAxisAlignedClip(ld.params.contentBounds,
D2D1_ANTIALIAS_MODE_ALIASED);
// Store layer parameters.
m_layers.push(ld);
}
void wxD2DContext::ResetClip()
{
wxStack<LayerData> layersToRestore;
@@ -3573,12 +3570,6 @@ void wxD2DContext::ResetClip()
LayerData ld = m_layers.top();
m_layers.pop();
if ( ld.type == CLIP_AXIS_ALIGNED_RECT )
{
GetRenderTarget()->PopAxisAlignedClip();
continue;
}
if ( ld.type == CLIP_LAYER )
{
GetRenderTarget()->PopLayer();
@@ -3722,13 +3713,6 @@ void wxD2DContext::EndLayer()
LayerData ld = m_layers.top();
m_layers.pop();
if ( ld.type == CLIP_AXIS_ALIGNED_RECT )
{
GetRenderTarget()->PopAxisAlignedClip();
layersToRestore.push(ld);
continue;
}
if ( ld.type == CLIP_LAYER )
{
GetRenderTarget()->PopLayer();
@@ -3754,12 +3738,7 @@ void wxD2DContext::EndLayer()
LayerData ld = layersToRestore.top();
layersToRestore.pop();
if ( ld.type == CLIP_AXIS_ALIGNED_RECT )
{
GetRenderTarget()->PushAxisAlignedClip(ld.params.contentBounds,
ld.params.maskAntialiasMode);
}
else if ( ld.type == CLIP_LAYER )
if ( ld.type == CLIP_LAYER )
{
GetRenderTarget()->PushLayer(ld.params, ld.layer);
}
@@ -4093,14 +4072,7 @@ void wxD2DContext::Flush()
LayerData ld = m_layers.top();
m_layers.pop();
if ( ld.type == CLIP_AXIS_ALIGNED_RECT )
{
GetRenderTarget()->PopAxisAlignedClip();
}
else
{
GetRenderTarget()->PopLayer();
}
GetRenderTarget()->PopLayer();
// Save layer data.
layersToRestore.push(ld);
@@ -4123,15 +4095,8 @@ void wxD2DContext::Flush()
LayerData ld = layersToRestore.top();
layersToRestore.pop();
if ( ld.type == CLIP_AXIS_ALIGNED_RECT )
{
GetRenderTarget()->PushAxisAlignedClip(ld.params.contentBounds,
ld.params.maskAntialiasMode);
}
else
{
GetRenderTarget()->PushLayer(ld.params, ld.layer);
}
GetRenderTarget()->PushLayer(ld.params, ld.layer);
// Store layer parameters.
m_layers.push(ld);
}