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Add more tests of converting wxBitmap to wxImage

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This commit is contained in:
Artur Wieczorek
2021-01-20 19:28:21 +01:00
parent 892795ac9c
commit efb96a352d
1 changed files with 283 additions and 28 deletions
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299
tests/graphics/bitmap.cpp
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@@ -131,17 +131,55 @@ TEST_CASE("BitmapTestCase::Mask", "[bitmap][mask]")
REQUIRE(bmp.GetMask() == mask2); REQUIRE(bmp.GetMask() == mask2);
} }
TEST_CASE("BitmapTestCase::ConvertToImageWithMask", "[bitmap][image][mask]") TEST_CASE("BitmapTestCase::ToImage", "[bitmap][image][convertto]")
{ {
wxBitmap color(32, 32, 24); SECTION("RGB bitmap without mask")
{ {
wxMemoryDC dc(color); // RGB bitmap
wxBitmap bmp(16, 16, 24);
{
wxMemoryDC dc(bmp);
dc.SetPen(*wxYELLOW_PEN); dc.SetPen(*wxYELLOW_PEN);
dc.SetBrush(*wxYELLOW_BRUSH); dc.SetBrush(*wxYELLOW_BRUSH);
dc.DrawRectangle(0, 0, color.GetWidth(), color.GetHeight()); dc.DrawRectangle(0, 0, bmp.GetWidth(), bmp.GetHeight());
} }
REQUIRE_FALSE(bmp.HasAlpha());
REQUIRE(bmp.GetMask() == NULL);
wxImage image = bmp.ConvertToImage();
REQUIRE_FALSE(image.HasAlpha());
REQUIRE_FALSE(image.HasMask());
REQUIRE(image.GetWidth() == bmp.GetWidth());
REQUIRE(image.GetHeight() == bmp.GetHeight());
wxNativePixelData dataBmp(bmp);
wxNativePixelData::Iterator rowStartBmp(dataBmp);
for ( int y = 0; y < bmp.GetHeight(); ++y )
{ {
wxBitmap bmask(color.GetWidth(), color.GetHeight(), 1); wxNativePixelData::Iterator iBmp = rowStartBmp;
for ( int x = 0; x < bmp.GetWidth(); ++x, ++iBmp )
{
wxColour bmpc(iBmp.Red(), iBmp.Green(), iBmp.Blue());
wxColour imgc(image.GetRed(x, y), image.GetGreen(x, y), image.GetBlue(x, y));
CHECK_EQUAL_COLOUR_RGB(imgc, bmpc);
}
rowStartBmp.OffsetY(dataBmp, 1);
}
}
SECTION("RGB bitmap with mask")
{
// RGB bitmap
wxBitmap bmp(16, 16, 24);
{
wxMemoryDC dc(bmp);
dc.SetPen(*wxYELLOW_PEN);
dc.SetBrush(*wxYELLOW_BRUSH);
dc.DrawRectangle(0, 0, bmp.GetWidth(), bmp.GetHeight());
}
// Mask
wxBitmap bmask(bmp.GetWidth(), bmp.GetHeight(), 1);
{ {
wxMemoryDC dc(bmask); wxMemoryDC dc(bmask);
#if wxUSE_GRAPHICS_CONTEXT #if wxUSE_GRAPHICS_CONTEXT
@@ -157,31 +195,248 @@ TEST_CASE("BitmapTestCase::ConvertToImageWithMask", "[bitmap][image][mask]")
dc.SetBrush(*wxWHITE_BRUSH); dc.SetBrush(*wxWHITE_BRUSH);
dc.DrawRectangle(4, 4, 8, 8); dc.DrawRectangle(4, 4, 8, 8);
} }
REQUIRE_FALSE(color.HasAlpha()); bmp.SetMask(new wxMask(bmask));
REQUIRE(color.GetMask() == NULL); REQUIRE_FALSE(bmp.HasAlpha());
color.SetMask(new wxMask(bmask)); REQUIRE(bmp.GetMask() != NULL);
REQUIRE_FALSE(color.HasAlpha()); const int numUnmaskedPixels = 8 * 8;
REQUIRE(color.GetMask() != NULL);
}
wxImage image = color.ConvertToImage();
wxNativePixelData dataColor(color); wxImage image = bmp.ConvertToImage();
wxNativePixelData::Iterator rowStartColor(dataColor); REQUIRE_FALSE(image.HasAlpha());
wxBitmap mask = color.GetMask()->GetBitmap(); REQUIRE(image.HasMask() == true);
REQUIRE(image.GetWidth() == bmp.GetWidth());
REQUIRE(image.GetHeight() == bmp.GetHeight());
const wxColour maskCol(image.GetMaskRed(), image.GetMaskGreen(), image.GetMaskBlue());
REQUIRE(maskCol.IsOk());
wxNativePixelData dataBmp(bmp);
wxNativePixelData::Iterator rowStartBmp(dataBmp);
wxBitmap mask = bmp.GetMask()->GetBitmap();
wxNativePixelData dataMask(mask); wxNativePixelData dataMask(mask);
wxNativePixelData::Iterator rowStartMask(dataMask); wxNativePixelData::Iterator rowStartMask(dataMask);
for ( int y = 0; y < color.GetHeight(); ++y ) { int unmaskedPixelsCount = 0;
wxNativePixelData::Iterator iColor = rowStartColor; for ( int y = 0; y < bmp.GetHeight(); ++y )
{
wxNativePixelData::Iterator iBmp = rowStartBmp;
wxNativePixelData::Iterator iMask = rowStartMask; wxNativePixelData::Iterator iMask = rowStartMask;
for ( int x = 0; x < color.GetWidth(); ++x, ++iColor, ++iMask ) { for ( int x = 0; x < bmp.GetWidth(); ++x, ++iBmp, ++iMask )
CHECK((iMask.Red() == 255 && iMask.Green() == 255 && iMask.Blue() == 255 ? iColor.Red() : 1) == image.GetRed(x, y)); {
CHECK((iMask.Red() == 255 && iMask.Green() == 255 && iMask.Blue() == 255 ? iColor.Green() : 2) == image.GetGreen(x, y)); wxColour bmpc(iBmp.Red(), iBmp.Green(), iBmp.Blue());
CHECK((iMask.Red() == 255 && iMask.Green() == 255 && iMask.Blue() == 255 ? iColor.Blue() : 3) == image.GetBlue(x, y)); wxColour maskc(iMask.Red(), iMask.Green(), iMask.Blue());
wxColour imgc(image.GetRed(x, y), image.GetGreen(x, y), image.GetBlue(x, y));
if ( maskc == *wxWHITE )
{
CHECK_EQUAL_COLOUR_RGB(imgc, bmpc);
unmaskedPixelsCount++;
} }
rowStartColor.OffsetY(dataColor, 1); else
{
CHECK_EQUAL_COLOUR_RGB(imgc, maskCol);
}
}
rowStartBmp.OffsetY(dataBmp, 1);
rowStartMask.OffsetY(dataMask, 1); rowStartMask.OffsetY(dataMask, 1);
} }
CHECK(unmaskedPixelsCount == numUnmaskedPixels);
}
SECTION("RGBA bitmap without mask")
{
// RGBA Bitmap
wxBitmap bmp(16, 16, 32);
#if defined(__WXMSW__) || defined(__WXOSX__)
bmp.UseAlpha();
#endif // __WXMSW__ || __WXOSX__
{
const wxColour clrFg(*wxCYAN);
const wxColour clrBg(*wxGREEN);
const unsigned char alpha = 92;
#if defined(__WXMSW__) || defined(__WXOSX__)
// premultiplied values
const wxColour clrFgAlpha(((clrFg.Red() * alpha) + 127) / 255, ((clrFg.Green() * alpha) + 127) / 255, ((clrFg.Blue() * alpha) + 127) / 255);
#else
const wxColour clrFgAlpha(clrFg);
#endif // __WXMSW__ || __WXOSX__
wxAlphaPixelData data(bmp);
REQUIRE(data);
wxAlphaPixelData::Iterator p(data);
for ( int y = 0; y < bmp.GetHeight(); y++)
{
wxAlphaPixelData::Iterator rowStart = p;
for ( int x = 0; x < bmp.GetWidth(); x++, ++p )
{
if ( x < bmp.GetWidth() / 2 )
{ // opaque
p.Red() = clrFg.Red();
p.Green() = clrFg.Green();
p.Blue() = clrFg.Blue();
p.Alpha() = 255;
}
else
{ // with transparency
p.Red() = clrFgAlpha.Red();
p.Green() = clrFgAlpha.Green();
p.Blue() = clrFgAlpha.Blue();
p.Alpha() = alpha;
}
}
p = rowStart;
p.OffsetY(data, 1);
}
}
REQUIRE(bmp.HasAlpha() == true);
REQUIRE(bmp.GetMask() == NULL);
wxImage image = bmp.ConvertToImage();
REQUIRE(image.HasAlpha() == true);
REQUIRE_FALSE(image.HasMask());
REQUIRE(image.GetWidth() == bmp.GetWidth());
REQUIRE(image.GetHeight() == bmp.GetHeight());
wxAlphaPixelData dataBmp(bmp);
wxAlphaPixelData::Iterator rowStartBmp(dataBmp);
for ( int y = 0; y < bmp.GetHeight(); ++y )
{
wxAlphaPixelData::Iterator iBmp = rowStartBmp;
for ( int x = 0; x < bmp.GetWidth(); ++x, ++iBmp )
{
wxColour bmpc(iBmp.Red(), iBmp.Green(), iBmp.Blue(), iBmp.Alpha());
wxColour imgc(image.GetRed(x, y), image.GetGreen(x, y), image.GetBlue(x, y), image.GetAlpha(x,y));
#if defined(__WXMSW__) || defined(__WXOSX__)
// Premultiplied values
unsigned char r = ((imgc.Red() * imgc.Alpha()) + 127) / 255;
unsigned char g = ((imgc.Green() * imgc.Alpha()) + 127) / 255;
unsigned char b = ((imgc.Blue() * imgc.Alpha()) + 127) / 255;
imgc.Set(r, g, b, imgc.Alpha());
#endif // __WXMSW__ || __WXOSX__
CHECK_EQUAL_COLOUR_RGBA(imgc, bmpc);
}
rowStartBmp.OffsetY(dataBmp, 1);
}
}
#if defined(__WXGTK20__) && !defined(__WXGTK3__)
// Bitmaps with both alpha and a mask don't work well in wxGTK2 so skip the test in this case.
WARN("Skipping test known not to work in wxGTK2.");
#else
SECTION("RGBA bitmap with mask")
{
// RGBA Bitmap
wxBitmap bmp(16, 16, 32);
#if defined(__WXMSW__) || defined(__WXOSX__)
bmp.UseAlpha();
#endif // __WXMSW__ || __WXOSX__
{
const wxColour clrFg(*wxCYAN);
const wxColour clrBg(*wxGREEN);
const unsigned char alpha = 92;
#if defined(__WXMSW__) || defined(__WXOSX__)
// premultiplied values
const wxColour clrFgAlpha(((clrFg.Red() * alpha) + 127) / 255, ((clrFg.Green() * alpha) + 127) / 255, ((clrFg.Blue() * alpha) + 127) / 255);
#else
const wxColour clrFgAlpha(clrFg);
#endif // __WXMSW__ || __WXOSX__
wxAlphaPixelData data(bmp);
REQUIRE(data);
wxAlphaPixelData::Iterator p(data);
for ( int y = 0; y < bmp.GetHeight(); y++)
{
wxAlphaPixelData::Iterator rowStart = p;
for ( int x = 0; x < bmp.GetWidth(); x++, ++p )
{
if ( x < bmp.GetWidth() / 2 )
{ // opaque
p.Red() = clrFg.Red();
p.Green() = clrFg.Green();
p.Blue() = clrFg.Blue();
p.Alpha() = 255;
}
else
{ // with transparency
p.Red() = clrFgAlpha.Red();
p.Green() = clrFgAlpha.Green();
p.Blue() = clrFgAlpha.Blue();
p.Alpha() = alpha;
}
}
p = rowStart;
p.OffsetY(data, 1);
}
}
// Mask
wxBitmap bmask(bmp.GetWidth(), bmp.GetHeight(), 1);
{
wxMemoryDC dc(bmask);
#if wxUSE_GRAPHICS_CONTEXT
wxGraphicsContext* gc = dc.GetGraphicsContext();
if (gc)
{
gc->SetAntialiasMode(wxANTIALIAS_NONE);
}
#endif // wxUSE_GRAPHICS_CONTEXT
dc.SetBackground(*wxBLACK_BRUSH);
dc.Clear();
dc.SetPen(*wxWHITE_PEN);
dc.SetBrush(*wxWHITE_BRUSH);
dc.DrawRectangle(4, 4, 8, 8);
}
bmp.SetMask(new wxMask(bmask));
REQUIRE(bmp.HasAlpha() == true);
REQUIRE(bmp.GetMask() != NULL);
const int numUnmaskedPixels = 8 * 8;
wxImage image = bmp.ConvertToImage();
REQUIRE(image.HasAlpha() == true);
REQUIRE(image.HasMask() == true);
REQUIRE(image.GetWidth() == bmp.GetWidth());
REQUIRE(image.GetHeight() == bmp.GetHeight());
const wxColour maskCol(image.GetMaskRed(), image.GetMaskGreen(), image.GetMaskBlue());
REQUIRE(maskCol.IsOk());
wxAlphaPixelData dataBmp(bmp);
wxAlphaPixelData::Iterator rowStartBmp(dataBmp);
wxBitmap mask = bmp.GetMask()->GetBitmap();
wxNativePixelData dataMask(mask);
wxNativePixelData::Iterator rowStartMask(dataMask);
int unmaskedPixelsCount = 0;
for ( int y = 0; y < bmp.GetHeight(); ++y )
{
wxAlphaPixelData::Iterator iBmp = rowStartBmp;
wxNativePixelData::Iterator iMask = rowStartMask;
for ( int x = 0; x < bmp.GetWidth(); ++x, ++iBmp, ++iMask )
{
wxColour bmpc(iBmp.Red(), iBmp.Green(), iBmp.Blue(), iBmp.Alpha());
wxColour maskc(iMask.Red(), iMask.Green(), iMask.Blue());
wxColour imgc(image.GetRed(x, y), image.GetGreen(x, y), image.GetBlue(x, y), image.GetAlpha(x,y));
if ( maskc == *wxWHITE )
{
#if defined(__WXMSW__) || defined(__WXOSX__)
// Premultiplied values
unsigned char r = ((imgc.Red() * imgc.Alpha()) + 127) / 255;
unsigned char g = ((imgc.Green() * imgc.Alpha()) + 127) / 255;
unsigned char b = ((imgc.Blue() * imgc.Alpha()) + 127) / 255;
imgc.Set(r, g, b, imgc.Alpha());
#endif // __WXMSW__ || __WXOSX
CHECK_EQUAL_COLOUR_RGBA(imgc, bmpc);
unmaskedPixelsCount++;
}
else
{
CHECK_EQUAL_COLOUR_RGB(imgc, maskCol);
CHECK(imgc.Alpha() == bmpc.Alpha());
}
}
rowStartBmp.OffsetY(dataBmp, 1);
rowStartMask.OffsetY(dataMask, 1);
}
CHECK(unmaskedPixelsCount == numUnmaskedPixels);
}
#endif // !__WXGTK20__
} }
TEST_CASE("BitmapTestCase::FromImage", "[bitmap][image][convertfrom]") TEST_CASE("BitmapTestCase::FromImage", "[bitmap][image][convertfrom]")