/**
* Predicate to check an image pixel matches color and alpha
*
* @param aImage the image to check
* @param aX pixel x-coordinate
* @param aY pixel y-coordinate
* @param aColor expected color (alpha is 1.0 if image doesn't support alpha)
* @return true if colour match
*/
bool IsImagePixelOfColor( const wxImage& aImage, int aX, int aY, const KIGFX::COLOR4D& aColor )
{
const wxSize imageSize = aImage.GetSize();
if( imageSize.x < aX || imageSize.y < aY )
{
BOOST_TEST_INFO( "Pixel (" << aX << ", " << aY << "is not in image of size (" << imageSize.x
<< ", " << imageSize.y << ")" );
return false;
}
const int r = aImage.GetRed( aX, aY );
const int g = aImage.GetGreen( aX, aY );
const int b = aImage.GetBlue( aX, aY );
const int a = aImage.HasAlpha() ? aImage.GetAlpha( aX, aY ) : 255;
if( !KI_TEST::IsColorNearHex( aColor, r, g, b, a ) )
{
BOOST_TEST_INFO( "Colour doesn't match: got rgba(" << r << ", " << g << ", " << b << ", "
<< a << "), expected " << aColor );
return false;
}
return true;
}
bool usImage::CopyFromImage(const wxImage& img)
{
Init(img.GetSize());
const unsigned char *pSrc = img.GetData();
unsigned short *pDest = ImageData;
for (int i = 0; i < NPixels; i++)
{
*pDest++ = ((unsigned short) *pSrc) << 8;
pSrc += 3;
}
return false;
}
static QImage ConvertImage( const wxImage &image )
{
bool hasAlpha = image.HasAlpha();
bool hasMask = image.HasMask();
QImage qtImage( wxQtConvertSize( image.GetSize() ),
( (hasAlpha || hasMask ) ? QImage::Format_ARGB32 : QImage::Format_RGB32 ) );
unsigned char *data = image.GetData();
unsigned char *alpha = hasAlpha ? image.GetAlpha() : NULL;
QRgb colour;
QRgb maskedColour;
if ( hasMask )
{
unsigned char r, g, b;
image.GetOrFindMaskColour( &r, &g, &b );
maskedColour = ( r << 16 ) + ( g << 8 ) + b;
}
for (int y = 0; y < image.GetHeight(); y++)
{
for (int x = 0; x < image.GetWidth(); x++)
{
if (hasAlpha)
{
colour = alpha[0] << 24;
alpha++;
}
else
colour = 0;
colour += (data[0] << 16) + (data[1] << 8) + data[2];
if ( hasMask && colour != maskedColour )
colour += 0xFF000000; // 255 << 24
qtImage.setPixel(x, y, colour);
data += 3;
}
}
return qtImage;
}
wxImage ScaleImage(wxImage image, double source_scale_factor, double content_scale_factor,
wxSize output_size, wxRect usable_rect, LSIFlags flags,
const wxColour& fill_color)
{
if (!image.IsOk())
{
wxFAIL_MSG("WxUtils::ScaleImage expects a valid image.");
return image;
}
if (content_scale_factor != 1.0)
{
output_size *= content_scale_factor;
usable_rect.SetPosition(usable_rect.GetPosition() * content_scale_factor);
usable_rect.SetSize(usable_rect.GetSize() * content_scale_factor);
}
// Fix the output size if it's unset.
wxSize img_size = image.GetSize();
if (output_size.GetWidth() < 1)
output_size.SetWidth(
static_cast<int>(img_size.GetWidth() * (content_scale_factor / source_scale_factor)));
if (output_size.GetHeight() < 1)
output_size.SetHeight(
static_cast<int>(img_size.GetHeight() * (content_scale_factor / source_scale_factor)));
// Fix the usable rect. If it's empty then the whole canvas is usable.
if (usable_rect.IsEmpty())
{
// Constructs a temp wxRect 0,0->output_size then move assigns it.
usable_rect = output_size;
}
else if (!usable_rect.Intersects(output_size))
{
wxFAIL_MSG("Usable Zone Rectangle is not inside the canvas. Check the output size is correct.");
image.Create(1, 1, false);
image.SetRGB(0, 0, fill_color.Red(), fill_color.Green(), fill_color.Blue());
if (fill_color.Alpha() == wxALPHA_TRANSPARENT)
image.SetMaskColour(fill_color.Red(), fill_color.Green(), fill_color.Blue());
usable_rect = output_size;
}
// Step 1: Scale the image
if ((flags & LSI_SCALE) != LSI_SCALE_NONE)
{
if (flags & LSI_SCALE_NO_ASPECT)
{
// Stretch scale without preserving the aspect ratio.
bool scale_width = (img_size.GetWidth() > usable_rect.GetWidth() && flags & LSI_SCALE_DOWN) ||
(img_size.GetWidth() < usable_rect.GetWidth() && flags & LSI_SCALE_UP);
bool scale_height =
(img_size.GetHeight() > usable_rect.GetHeight() && flags & LSI_SCALE_DOWN) ||
(img_size.GetHeight() < usable_rect.GetHeight() && flags & LSI_SCALE_UP);
if (scale_width || scale_height)
{
// NOTE: Using BICUBIC instead of HIGH because it's the same internally
// except that downscaling uses a box filter with awful obvious aliasing
// for non-integral scale factors.
image.Rescale(scale_width ? usable_rect.GetWidth() : img_size.GetWidth(),
scale_height ? usable_rect.GetHeight() : img_size.GetHeight(),
wxIMAGE_QUALITY_BICUBIC);
}
}
else
{
// Scale while preserving the aspect ratio.
double scale = std::min(static_cast<double>(usable_rect.GetWidth()) / img_size.GetWidth(),
static_cast<double>(usable_rect.GetHeight()) / img_size.GetHeight());
int target_width = static_cast<int>(img_size.GetWidth() * scale);
int target_height = static_cast<int>(img_size.GetHeight() * scale);
// Bilinear produces sharper images when upscaling, bicubic tends to smear/blur sharp edges.
if (scale > 1.0 && flags & LSI_SCALE_UP)
image.Rescale(target_width, target_height, wxIMAGE_QUALITY_BILINEAR);
else if (scale < 1.0 && flags & LSI_SCALE_DOWN)
image.Rescale(target_width, target_height, wxIMAGE_QUALITY_BICUBIC);
}
img_size = image.GetSize();
}
// Step 2: Resize the canvas to match the output size.
// NOTE: If NOT using LSI_SCALE_DOWN then this will implicitly crop the image
if (img_size != output_size || usable_rect.GetPosition() != wxPoint())
{
wxPoint base = usable_rect.GetPosition();
if (flags & LSI_ALIGN_HCENTER)
base.x += (usable_rect.GetWidth() - img_size.GetWidth()) / 2;
else if (flags & LSI_ALIGN_RIGHT)
base.x += usable_rect.GetWidth() - img_size.GetWidth();
if (flags & LSI_ALIGN_VCENTER)
base.y += (usable_rect.GetHeight() - img_size.GetHeight()) / 2;
else if (flags & LSI_ALIGN_BOTTOM)
base.y += usable_rect.GetHeight() - img_size.GetHeight();
int r = -1, g = -1, b = -1;
if (fill_color.Alpha() != wxALPHA_TRANSPARENT)
{
r = fill_color.Red();
g = fill_color.Green();
b = fill_color.Blue();
}
image.Resize(output_size, base, r, g, b);
}
return image;
}
void print_log_value<wxImage>::operator()( std::ostream& os, wxImage const& aImage )
{
const wxSize size = aImage.GetSize();
os << "wxImage[" << size.x << "x" << size.y << "]";
}