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Added tests to check setting of clipping region for transformed wxDC/wxGCDC.

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In these tests clipping region is set for transformed wxDC/wxGCDC (with changed device origin, logical origin and scale) to check if all these transformations are taken into account in the clipping box calculations.
This commit is contained in:
Artur Wieczorek
2016-07-09 22:56:55 +02:00
parent 53230aaf4d
commit 2b7aab70ff
1 changed files with 61 additions and 20 deletions
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57
tests/graphics/clippingbox.cpp
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@@ -27,7 +27,7 @@
// test class
// ----------------------------------------------------------------------------
static const wxSize s_dcSize(100, 105);
static const wxSize s_dcSize(100, 120);
static const wxColour s_bgColour(*wxWHITE); // colour to draw outside clipping box
static const wxColour s_fgColour(*wxGREEN); // colour to draw inside clipping box
@@ -52,12 +52,14 @@ private:
protected:
void InitialState();
void InitialStateWithTransformedDC();
void OneRegion();
void OneLargeRegion();
void OneOuterRegion();
void OneRegionNegDim();
void OneRegionAndReset();
void OneRegionAndEmpty();
void OneRegionWithTransformedDC();
void TwoRegionsOverlapping();
void TwoRegionsOverlappingNegDim();
void TwoRegionsNonOverlapping();
@@ -100,12 +102,14 @@ public:
private:
CPPUNIT_TEST_SUITE( ClippingBoxTestCaseDC );
CPPUNIT_TEST( InitialState );
CPPUNIT_TEST( InitialStateWithTransformedDC );
CPPUNIT_TEST( OneRegion );
CPPUNIT_TEST( OneLargeRegion );
CPPUNIT_TEST( OneOuterRegion );
CPPUNIT_TEST( OneRegionNegDim );
CPPUNIT_TEST( OneRegionAndReset );
CPPUNIT_TEST( OneRegionAndEmpty );
CPPUNIT_TEST( OneRegionWithTransformedDC );
CPPUNIT_TEST( TwoRegionsOverlapping );
CPPUNIT_TEST( TwoRegionsOverlappingNegDim );
CPPUNIT_TEST( TwoRegionsNonOverlapping );
@@ -161,12 +165,14 @@ public:
private:
CPPUNIT_TEST_SUITE( ClippingBoxTestCaseGCDC );
CPPUNIT_TEST( InitialState );
CPPUNIT_TEST( InitialStateWithTransformedDC );
CPPUNIT_TEST( OneRegion );
CPPUNIT_TEST( OneLargeRegion );
CPPUNIT_TEST( OneOuterRegion );
CPPUNIT_TEST( OneRegionNegDim );
CPPUNIT_TEST( OneRegionAndReset );
CPPUNIT_TEST( OneRegionAndEmpty );
CPPUNIT_TEST( OneRegionWithTransformedDC );
CPPUNIT_TEST( TwoRegionsOverlapping );
CPPUNIT_TEST( TwoRegionsOverlappingNegDim );
CPPUNIT_TEST( TwoRegionsNonOverlapping );
@@ -208,12 +214,14 @@ public:
private:
CPPUNIT_TEST_SUITE( ClippingBoxTestCaseGDIPlus );
CPPUNIT_TEST( InitialState );
CPPUNIT_TEST( InitialStateWithTransformedDC );
CPPUNIT_TEST( OneRegion );
CPPUNIT_TEST( OneLargeRegion );
CPPUNIT_TEST( OneOuterRegion );
CPPUNIT_TEST( OneRegionNegDim );
CPPUNIT_TEST( OneRegionAndReset );
CPPUNIT_TEST( OneRegionAndEmpty );
CPPUNIT_TEST( OneRegionWithTransformedDC );
CPPUNIT_TEST( TwoRegionsOverlapping );
CPPUNIT_TEST( TwoRegionsOverlappingNegDim );
CPPUNIT_TEST( TwoRegionsNonOverlapping );
@@ -259,12 +267,14 @@ public:
private:
CPPUNIT_TEST_SUITE( ClippingBoxTestCaseDirect2D );
CPPUNIT_TEST( InitialState );
CPPUNIT_TEST( InitialStateWithTransformedDC );
CPPUNIT_TEST( OneRegion );
CPPUNIT_TEST( OneLargeRegion );
CPPUNIT_TEST( OneOuterRegion );
CPPUNIT_TEST( OneRegionNegDim );
CPPUNIT_TEST( OneRegionAndReset );
CPPUNIT_TEST( OneRegionAndEmpty );
CPPUNIT_TEST( OneRegionWithTransformedDC );
CPPUNIT_TEST( TwoRegionsOverlapping );
CPPUNIT_TEST( TwoRegionsOverlappingNegDim );
CPPUNIT_TEST( TwoRegionsNonOverlapping );
@@ -302,12 +312,14 @@ public:
private:
CPPUNIT_TEST_SUITE( ClippingBoxTestCaseCairo );
CPPUNIT_TEST( InitialState );
CPPUNIT_TEST( InitialStateWithTransformedDC );
CPPUNIT_TEST( OneRegion );
CPPUNIT_TEST( OneLargeRegion );
CPPUNIT_TEST( OneOuterRegion );
CPPUNIT_TEST( OneRegionNegDim );
CPPUNIT_TEST( OneRegionAndReset );
CPPUNIT_TEST( OneRegionAndEmpty );
CPPUNIT_TEST( OneRegionWithTransformedDC );
CPPUNIT_TEST( TwoRegionsOverlapping );
CPPUNIT_TEST( TwoRegionsOverlappingNegDim );
CPPUNIT_TEST( TwoRegionsNonOverlapping );
@@ -367,17 +379,26 @@ void ClippingBoxTestCaseBase::CheckBox(int x, int y, int width, int height)
msg = msgDim;
}
// We will examine pixels directly in the underlying bitmap
// so we need to get device coordinates of examined area.
x = m_dc->LogicalToDeviceX(x);
y = m_dc->LogicalToDeviceY(y);
width = m_dc->LogicalToDeviceXRel(width);
height = m_dc->LogicalToDeviceYRel(height);
// Update wxDC contents.
FlushDC();
// Check whether diagonal corners of the clipping box
// are actually drawn at the edge of the clipping region.
#if wxUSE_IMAGE
// For some renderers is's not possible to get pixels
// For some renderers it's not possible to get pixels
// value from wxDC so we would have to examine pixels
// in the underlying bitmap.
wxImage img;
img = m_bmp.ConvertToImage();
#else
return;
#endif // wxUSE_IMAGE
// Check area near the top-left corner
@@ -394,8 +415,6 @@ void ClippingBoxTestCaseBase::CheckBox(int x, int y, int width, int height)
for( int px = xmin; px <= xmax; px++ )
{
wxColour c;
if ( !m_dc->GetPixel(px, py, &c) )
{
#if wxUSE_IMAGE
unsigned char r = img.GetRed(px, py);
unsigned char g = img.GetGreen(px, py);
@@ -405,7 +424,6 @@ void ClippingBoxTestCaseBase::CheckBox(int x, int y, int width, int height)
// We cannot get pixel value
break;
#endif // wxUSE_IMAGE / !wxUSE_IMAGE
}
wxString msgColour;
if ( px >= x && px <= x + (width-1) &&
@@ -458,8 +476,6 @@ void ClippingBoxTestCaseBase::CheckBox(int x, int y, int width, int height)
for( int px = xmin; px <= xmax; px++ )
{
wxColour c;
if ( !m_dc->GetPixel(px, py, &c) )
{
#if wxUSE_IMAGE
unsigned char r = img.GetRed(px, py);
unsigned char g = img.GetGreen(px, py);
@@ -469,7 +485,6 @@ void ClippingBoxTestCaseBase::CheckBox(int x, int y, int width, int height)
// We cannot get pixel value
break;
#endif // wxUSE_IMAGE / !wxUSE_IMAGE
}
wxString msgColour;
if ( px >= x && px <= x + (width-1) &&
@@ -525,6 +540,18 @@ void ClippingBoxTestCaseBase::InitialState()
CheckBox(0, 0, s_dcSize.GetWidth(), s_dcSize.GetHeight());
}
void ClippingBoxTestCaseBase::InitialStateWithTransformedDC()
{
// Initial clipping box with transformed DC.
m_dc->SetDeviceOrigin(10, 15);
m_dc->SetUserScale(0.5, 1.5);
m_dc->SetLogicalScale(4.0, 2.0);
m_dc->SetLogicalOrigin(-15, -20);
m_dc->SetBackground(wxBrush(s_fgColour, wxBRUSHSTYLE_SOLID));
m_dc->Clear();
CheckBox(-20, -25, 50, 40);
}
void ClippingBoxTestCaseBase::OneRegion()
{
// Setting one clipping box inside DC area.
@@ -587,6 +614,20 @@ void ClippingBoxTestCaseBase::OneRegionAndEmpty()
CheckBox(0, 0, 0, 0);
}
void ClippingBoxTestCaseBase::OneRegionWithTransformedDC()
{
// Setting one clipping box inside DC area
// with applied some transformations.
m_dc->SetDeviceOrigin(10, 15);
m_dc->SetUserScale(0.5, 1.5);
m_dc->SetLogicalScale(4.0, 2.0);
m_dc->SetLogicalOrigin(-15, -20);
m_dc->SetClippingRegion(-10, -20, 80, 75);
m_dc->SetBackground(wxBrush(s_fgColour, wxBRUSHSTYLE_SOLID));
m_dc->Clear();
CheckBox(-10, -20, 40, 35);
}
void ClippingBoxTestCaseBase::TwoRegionsOverlapping()
{
// Setting one clipping box and next another box (partially overlapping).