(C++) SetPixelClx

 

SetPixelClx is a CLX graphics code snippet to set the color of a pixel.

 

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//--------------------------------------------------------------------------- #include <QExtCtrls.hpp> #include <cassert> //--------------------------------------------------------------------------- //From http://www.richelbilderbeek.nl/CppSetPixelClx.htm void SetPixelClx(   TImage * const image,   const int x,   const int y,   const unsigned char red,   const unsigned char green,   const unsigned char blue) {   assert(image!=0 && "Image is NULL");   assert(image->Picture->Bitmap!=0 && "Bitmap is NULL");   assert(image->Picture->Bitmap->PixelFormat == pf32bit && "Bitmap must be 32 bit");   assert( x >= 0 && "x coordinat is below zero");   assert( y >= 0 && "y coordinat is below zero");   assert( x < image->Picture->Bitmap->Width && "x coordinat is beyond image width");   assert( y < image->Picture->Bitmap->Height && "y coordinat is beyond image height");   static_cast<unsigned char*>(image->Picture->Bitmap->ScanLine[y])[x*4+2] = red;   static_cast<unsigned char*>(image->Picture->Bitmap->ScanLine[y])[x*4+1] = green;   static_cast<unsigned char*>(image->Picture->Bitmap->ScanLine[y])[x*4+0] = blue; } //--------------------------------------------------------------------------- //From http://www.richelbilderbeek.nl void SetPixelClx(   TImage * const image,   const int x,   const int y,   const TColor color) {   assert(image!=0 && "Image is NULL");   assert(image->Picture->Bitmap!=0 && "Bitmap is NULL");   assert(image->Picture->Bitmap->PixelFormat == pf32bit && "Bitmap must be 32 bit");   assert( x >= 0 && "x coordinat is below zero");   assert( y >= 0 && "y coordinat is below zero");   assert( x < image->Picture->Bitmap->Width && "x coordinat is beyond image width");   assert( y < image->Picture->Bitmap->Height && "y coordinat is beyond image height");   static_cast<unsigned char*>(image->Picture->Bitmap->ScanLine[y])[x*4+2] = GetRValue(color);   static_cast<unsigned char*>(image->Picture->Bitmap->ScanLine[y])[x*4+1] = GetGValue(color);   static_cast<unsigned char*>(image->Picture->Bitmap->ScanLine[y])[x*4+0] = GetBValue(color); }