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RemoveColor

Removes a certain color from a TImage by replacing it by black.

* View the code of 'RemoveColor (CLX)' in plain text.

* View the code of 'RemoveColor (VCL)' in plain text.

RemoveColor (CLX)

To be done...

RemoveColor (VCL)

//From http://www.richelbilderbeek.nl

void RemoveColor(TImage * const image, const TColor color)

{

assert(image!=0);

assert(image->Picture->Bitmap != 0);

assert(image->Picture->Bitmap->PixelFormat == pf24bit);

const int maxx = image->Picture->Bitmap->Width;

const int maxy = image->Picture->Bitmap->Height;

const unsigned char red = GetRValue(color);

const unsigned char green = GetGValue(color);

const unsigned char blue = GetBValue(color);

for (int y = 0; y != maxy; ++y)

{

unsigned char * const myLine

= static_cast<unsigned char*>(image->Picture->Bitmap->ScanLine[y]);

for (int x = 0; x != maxx; ++x)

{

if ( myLine[x*3+2] == red //Red

&& myLine[x*3+1] == green //Green

&& myLine[x*3+0] == blue ) //Blue

{

myLine[x*3+2] = 0 ; //Red

myLine[x*3+1] = 0 ; //Green

myLine[x*3+0] = 0 ; //Blue

}

}

}

}

//From http://www.richelbilderbeek.nl

void RemoveColor(TImage * const image,

const unsigned char red,

const unsigned char green,

const unsigned char blue )

{

assert(image!=0);

assert(image->Picture->Bitmap != 0);

assert(image->Picture->Bitmap->PixelFormat == pf24bit);

const int maxx = image->Picture->Bitmap->Width;

const int maxy = image->Picture->Bitmap->Height;

for (int y = 0; y != maxy; ++y)

{

unsigned char * const myLine

= static_cast<unsigned char*>(image->Picture->Bitmap->ScanLine[y]);

for (int x = 0; x != maxx; ++x)

{

if ( myLine[x*3+2] == red //Red

&& myLine[x*3+1] == green //Green

&& myLine[x*3+0] == blue ) //Blue

{

myLine[x*3+2] = 0 ; //Red

myLine[x*3+1] = 0 ; //Green

myLine[x*3+0] = 0 ; //Blue

}

}

}

}

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