[Win 32 API] Problem with GetPixel()
Author
I have writen a small program which write on the screen the RGB value of a chosen pixel, but the program gives me an odd value.
For exemple, if the pixel color is RGB(50, 100, 150) the program gives me 9856050.
How can I get an RGB value?
Here''s my code:
#include
#include
using namespace std;
///////////////////////////////////////////////////////////////////
int main()
{
HDC hdcImage;
HBITMAP hbm;
char szBitmap[] = "bitmap.bmp";
int x = 1024;
int y = 768;
long pixelvalue = 0;
hbm = (HBITMAP) LoadImage(GetModuleHandle(NULL), szBitmap, IMAGE_BITMAP, x,
y, LR_CREATEDIBSECTION);
if (hbm == NULL)
hbm = (HBITMAP) LoadImage(NULL, szBitmap, IMAGE_BITMAP, x, y,
LR_LOADFROMFILE | LR_CREATEDIBSECTION);
hdcImage = CreateCompatibleDC(NULL);
SelectObject(hdcImage, hbm);
pixelvalue = GetPixel(hdcImage, 1, 1);
cout << pixelvalue << endl;
while (1)
{
}
return 0;
}
After you use GetPixel you need to use GetRValue, GetBValue, and GetGValue to extract the individual color components. You could always mask it to get the values too, but that's a bit of a pain 
.
Edited by - The Senshi on June 20, 2001 4:55:10 PM
.Edited by - The Senshi on June 20, 2001 4:55:10 PM
Why would you think that''s a weird value?
cout << RGB(50, 100, 150) << endl;
alse gives 9856050.
What were you expecting?
-Mike
cout << RGB(50, 100, 150) << endl;
alse gives 9856050.
What were you expecting?
-Mike
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