Question

this is my first question here; hope I’ll be clear enough…

I’ve got this struct available

typedef struct COLORTRIPLE
{
  byte blue;
  byte green;
  byte red;
}

which is contained in another struct like that:

struct color_temp
{ 
  COLORTRIPLE color;
  int temp;
};

And (EDIT)

#define PIXEL(image, row, column)  \
    image.pixel [(row) * image.width + (column)]

is a macro.

So there will be PIXEL(bmpin,row,column).red, PIXEL(bmpin,row,column).green and PIXEL(bmpin,row,column).blue.

I need to scan a bitmap file pixel by pixel and check if the current pixel is equal to one color of the color_temp struct.

I tried something like:

if ((PIXEL(bmpin,row,column))==(map[n].color))
{...}

where

struct color_temp map[]

is a vector of color_temp.

But cygwin gcc says:

error:request for member 'color' in something not a struct or a union

Any suggestions?

Thanks

Mark

Answer 1

Try this:

int is_pixels_equal (COLORTRIPLE a, COLORTRIPLE b) {
  return (a.red == b.red && a.green == b.green && a.blue == b.blue);
}