background color

[DavidP]

i am looking for a program that will report to me the background color of any pixel on the screen, so like if i was hovering my mouse over a picture it would tell me the color of the pixel that the mouse was currently sitting over...

anyone know of such a program? i have seen one before, but dont know where to get it

[jverkoey]

whee, you need the code for it?

Check out my runescape miner program in my portfolio:
http://thejefffiles.com/portfolios.php?name=jverkoey
direct link:
http://thejefffiles.com/downloadfile...ScapeMiner.zip

the code is in editmain.cpp in the source code

here's the code so you don't have to search for it

    // Grab the display's rendering context
    HDC hDC;
    hDC = CreateDC("DISPLAY",0,0,0);
    // Cursor position, wheee
    POINT Cursor;
    GetCursorPos(&Cursor);
    // It's stored as RGB or BGR or something, slipping my mind right now
    COLORREF color;
    color=GetPixel(hDC,Cursor.x,Cursor.y);
    // Clean up, yaay!
    DeleteDC(hDC);
    
    
    // Outputting junk for the win32 box...
    char Text[128];
    sprintf(Text,"#%x",color);
    SetWindowText(GetDlgItem(hwnd,IDC_PIXELCOLORHEX), Text);
    
    sprintf(Text,"%d",color>>16);
    SetWindowText(GetDlgItem(hwnd,IDC_PIXELCOLORB), Text);
    
    sprintf(Text,"%d",(color>>8)&0xFF);
    SetWindowText(GetDlgItem(hwnd,IDC_PIXELCOLORG), Text);
    
    sprintf(Text,"%d",(color)&0xFF);
    SetWindowText(GetDlgItem(hwnd,IDC_PIXELCOLORR), Text);
    
    sprintf(Text,"%d",Cursor.x);
    SetWindowText(GetDlgItem(hwnd,IDC_PIXELX), Text);
    
    sprintf(Text,"%d",Cursor.y);
    SetWindowText(GetDlgItem(hwnd,IDC_PIXELY), Text);

Have fun dissecting that, it's not too tough, really all you need is the first block of code

-edit-
yah, it's stored as BGR in the hex value

[anonytmouse]

#include <windows.h>
#pragma comment(lib, "gdi32.lib")
#pragma comment(lib, "user32.lib")

INT WINAPI WinMain(HINSTANCE hInstance, HINSTANCE reserved, LPSTR lpCommand, INT nCmdShow)
{
	MSG      msg         = { 0 };
	HWND     hwndEdit;
	POINT    pt;
	HDC      hdc;
	COLORREF clr, clrOld = RGB(1,1,1);
	TCHAR    buf[100];

	if (!(hdc = GetDC(NULL))) return -1;

	if (!(hwndEdit = CreateWindowEx(0, TEXT("EDIT"), TEXT("ColorHack"),
	                                WS_OVERLAPPEDWINDOW | WS_VISIBLE | ES_READONLY,
	                                0, 0, 200, 90,
	                                NULL, NULL, hInstance, NULL))) return -1;

	SetWindowPos(hwndEdit, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE);
	SetWindowText(hwndEdit, TEXT("Hold down H to activate!"));

	while (TRUE)
	{
		while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
		{
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}

		if (!IsWindow(hwndEdit))
		{
			break;
		}

		if ((GetAsyncKeyState('H') & 0x8000) && GetCursorPos(&pt))
		{
			if ((clr = GetPixel(hdc, pt.x, pt.y)) != CLR_INVALID &&
			    clr != clrOld)
			{
				clrOld = clr;
				wsprintf(buf, TEXT("%02x%02x%02x"), 
				                GetRValue(clr), GetGValue(clr), GetBValue(clr));
				SetWindowText(hwndEdit, buf);
			}
		}

		Sleep(20);
	}

	return 0;
}

[XSquared]

Try out Pixie.