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Pablo Bacigalupo
Guest
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 Posted: Thu Dec 08, 2005 8:51 pm Post subject: How get the TCanvas pixel color for use with GDI+ SetColor ? |
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Hi all !!
I would like to know, how to get the pixel color from the TCanvas of my
TForm,
and then use it with a GDI+ function, for example:
Gdiplus::Pen pen(Gdiplus::Color(255,0,0,0),1);
TColor myColor;
myColor = Canvas->Pixels[x][y];
// this line doesnt work like this...
// its only a pseudo code, right ?
pen->SetColor( myColor );
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Remy Lebeau (TeamB)
Guest
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| Posted: Thu Dec 08, 2005 10:05 pm Post subject: Re: How get the TCanvas pixel color for use with GDI+ SetCol |
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"Pablo Bacigalupo" <pablolupo (AT) yahoo (DOT) com.ar> wrote
| Quote: | // this line doesnt work like this...
// its only a pseudo code, right ?
pen->SetColor( myColor );
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The Pen::SetColor() method expects a Gdiplus::Color object, ie:
Gdiplus::Pen pen(Gdiplus::Color(0,0,0), 1.0);
int rgb = ColorToRGB(Canvas->Pixels[x][y]);
pen->SetColor(Gdiplus::Color(GetRValue(rgb), GetGValue(rgb),
GetBValue(rgb)));
Or:
int rgb = ColorToRGB(Canvas->Pixels[x][y]);
Gdiplus::Pen pen(Gdiplus::Color(GetRValue(rgb), GetGValue(rgb),
GetBValue(rgb)), 1.0);
Gambit
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Pablo Bacigalupo
Guest
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| Posted: Tue Dec 13, 2005 11:22 pm Post subject: Re: How get the TCanvas pixel color for use with GDI+ SetCol |
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Thank you very much Gambito, it is just what i was needing !!
"Remy Lebeau (TeamB)" <no.spam (AT) no (DOT) spam.com> escribió en el mensaje
news:4398aed0$1 (AT) newsgroups (DOT) borland.com...
| Quote: |
"Pablo Bacigalupo" <pablolupo (AT) yahoo (DOT) com.ar> wrote in message
news:43989cb9 (AT) newsgroups (DOT) borland.com...
// this line doesnt work like this...
// its only a pseudo code, right ?
pen->SetColor( myColor );
The Pen::SetColor() method expects a Gdiplus::Color object, ie:
Gdiplus::Pen pen(Gdiplus::Color(0,0,0), 1.0);
int rgb = ColorToRGB(Canvas->Pixels[x][y]);
pen->SetColor(Gdiplus::Color(GetRValue(rgb), GetGValue(rgb),
GetBValue(rgb)));
Or:
int rgb = ColorToRGB(Canvas->Pixels[x][y]);
Gdiplus::Pen pen(Gdiplus::Color(GetRValue(rgb), GetGValue(rgb),
GetBValue(rgb)), 1.0);
Gambit
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