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Keep track of graphics state stack depth

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To avoid restoring graphics state from the empty stack. This
could also help in diagnosing potential problems with unbalanced
PushState()/PopState() calls.
This commit is contained in:
Artur Wieczorek
2021-07-23 18:10:59 +02:00
parent 3e7ad82016
commit 7349f138e7
1 changed files with 6 additions and 0 deletions
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6
src/osx/carbon/graphics.cpp
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@@ -1543,6 +1543,7 @@ private:
CGAffineTransform m_initTransform;
CGAffineTransform m_windowTransform;
bool m_invisible;
int m_stateStackLevel;
#if wxOSX_USE_COCOA_OR_CARBON
wxCFRef<HIShapeRef> m_clipRgn;
@@ -1817,6 +1818,7 @@ bool wxMacCoreGraphicsContext::EnsureIsValid()
CGContextSetTextMatrix( m_cgContext, CGAffineTransformIdentity );
m_contextSynthesized = true;
CGContextSaveGState( m_cgContext );
m_stateStackLevel = 0;
#if 0 // turn on for debugging of clientdc
static float color = 0.5 ;
@@ -2375,6 +2377,7 @@ void wxMacCoreGraphicsContext::SetNativeContext( CGContextRef cg )
CGContextSaveGState( m_cgContext );
CGContextSetTextMatrix( m_cgContext, CGAffineTransformIdentity );
CGContextSaveGState( m_cgContext );
m_stateStackLevel = 0;
m_contextSynthesized = false;
}
}
@@ -2485,6 +2488,7 @@ void wxMacCoreGraphicsContext::PushState()
return;
CGContextSaveGState( m_cgContext );
m_stateStackLevel++;
}
void wxMacCoreGraphicsContext::PopState()
@@ -2492,7 +2496,9 @@ void wxMacCoreGraphicsContext::PopState()
if (!EnsureIsValid())
return;
wxCHECK_RET(m_stateStackLevel > 0, "No state to pop");
CGContextRestoreGState( m_cgContext );
m_stateStackLevel--;
}
void wxMacCoreGraphicsContext::DoDrawText( const wxString &str, wxDouble x, wxDouble y )