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Fixed drawing with wxGraphicsContext and Direct2D renderer.

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When render target to draw to a DC (created with ID2D1Factory::CreateDCRenderTarget method) is bound to the device context with ID2D1DCRenderTarget::BindDC method then the size of the area of drawing has to be a logical size of a DC (with its scaling factor taken int account). This can be determined directly using GetClipBox API and there is no need to pass it as a parameter of wxD2DDCRenderTargetResourceHolder ctor.

Closes #17504.
This commit is contained in:
Artur Wieczorek
2016-04-21 20:24:43 +02:00
parent deb162fc5a
commit 8a7374e5ca
1 changed files with 10 additions and 8 deletions
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18
src/msw/graphicsd2d.cpp
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@@ -2688,13 +2688,9 @@ private:
class wxD2DDCRenderTargetResourceHolder : public wxD2DRenderTargetResourceHolder
{
public:
wxD2DDCRenderTargetResourceHolder(ID2D1Factory* factory, HDC hdc, const wxSize dcSize, D2D1_ALPHA_MODE alphaMode) :
wxD2DDCRenderTargetResourceHolder(ID2D1Factory* factory, HDC hdc, D2D1_ALPHA_MODE alphaMode) :
m_factory(factory), m_hdc(hdc), m_alphaMode(alphaMode)
{
m_dcSize.left = 0;
m_dcSize.top = 0;
m_dcSize.right = dcSize.GetWidth();
m_dcSize.bottom = dcSize.GetHeight();
}
protected:
@@ -2710,7 +2706,14 @@ protected:
&renderTarget);
wxCHECK_HRESULT_RET(hr);
hr = renderTarget->BindDC(m_hdc, &m_dcSize);
// We want draw on the entire device area.
// GetClipBox() retrieves logical size of DC
// what is what we need to pass to BindDC.
RECT r;
int status = ::GetClipBox(m_hdc, &r);
wxCHECK_RET( status != ERROR, wxS("Error retrieving DC dimensions") );
hr = renderTarget->BindDC(m_hdc, &r);
wxCHECK_HRESULT_RET(hr);
m_nativeResource = renderTarget;
@@ -2719,7 +2722,6 @@ protected:
private:
ID2D1Factory* m_factory;
HDC m_hdc;
RECT m_dcSize;
D2D1_ALPHA_MODE m_alphaMode;
};
@@ -2973,7 +2975,7 @@ wxD2DContext::wxD2DContext(wxGraphicsRenderer* renderer, ID2D1Factory* direct2dF
wxD2DContext::wxD2DContext(wxGraphicsRenderer* renderer, ID2D1Factory* direct2dFactory, HDC hdc,
const wxSize& dcSize, D2D1_ALPHA_MODE alphaMode) :
wxGraphicsContext(renderer), m_direct2dFactory(direct2dFactory),
m_renderTargetHolder(new wxD2DDCRenderTargetResourceHolder(direct2dFactory, hdc, dcSize, alphaMode))
m_renderTargetHolder(new wxD2DDCRenderTargetResourceHolder(direct2dFactory, hdc, alphaMode))
{
m_width = dcSize.GetWidth();
m_height = dcSize.GetHeight();