GetDibits and GetObject
Author
Hi,
I have a question regarding GetObject(hbitmap,sizeof(BITMAPINFO),&bminfo);
The function failed to init the biBitCount field. Does the function work with getting bitmapinfo structure? Maybe I should use
GetObject(bitmap,sizeof(DIBSECTION),&ds);?
I know that the bitmap bit count(32bit) and I init that field myself then
I try to use GetDibits to get the pixel values from the bitmap and again it failed.
Here is my code. Do you see anything wrong?
//bitmap already loaded
GetObject(hBitmap,sizeof(BITMAP, &bitmap);
GetObject(hBitmap,sizeof(BITMAPINFO),&bminfo);
HDC hdcMem = CreateCompatibleDC(NULL);
SelectObject (hdcMem,hBitmap);
COLORREF *pix = new [bitmap.bmWidth * bitmap.bmHeight]
GetDibits(
hdcMem,
hbitmap,
0,
bitmap.bmHeight,
pix,
&bminfo,
DIB_RGB_COLORS);
int r = GetRValue(pix[0]);
int g = GetG..
int b ..
r, g, b are all equal to 205 but the color at (0,0) is pure blue.
Thanks!
Have you allready put a bitmap into the structure, otherwise it could be a black and white bitmap.
Cheers
Chris
Cheers
Chris
well if you just create a dc then it will have a black and white bitmap in it. :), Unless you create a dc from another dc it will be initialized that way.
Are you checking that GetObject's return code?? it returns 0 on failure.
Cheers
Chris
Are you checking that GetObject's return code?? it returns 0 on failure.
Cheers
Chris
This topic is closed to new replies.
Advertisement
Popular Topics
Advertisement
