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HomerSexual
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 Posted: Fri Sep 21, 2007 7:08 pm Post subject: c++ Monochrome HBITMAP is not what i want |
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monochrome is 2 colors, black and white
i want 24 bit color, not 1 bit
i can't get it to work though
Run the program and see the hdc is monochrome
The first BitBlt stores the hBitmap
The second paints the hBitmap onto the hdc
can anyone help?
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Last edited by HomerSexual on Fri Sep 21, 2007 7:38 pm; edited 1 time in total |
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appalsap
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Location: Pakistan
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| Posted: Fri Sep 21, 2007 7:20 pm Post subject: |
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| you didn't post any source code, how are we supposed to know what you did wrong?
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oib111
I post too much
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Joined: 02 Apr 2007
Posts: 2947
Location: you wanna know why?
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| Posted: Fri Sep 21, 2007 7:21 pm Post subject: |
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true...post source =P
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HomerSexual
Grandmaster Cheater Supreme
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| Posted: Fri Sep 21, 2007 7:38 pm Post subject: |
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oh yea i forgot, sorry long day
updating now
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oib111
I post too much
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Location: you wanna know why?
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| Posted: Fri Sep 21, 2007 8:21 pm Post subject: |
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T.T can't you just post the source instaed of attaching it...
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| 8D wrote: |
cigs dont make people high, which weed does, which causes them to do bad stuff. like killing |
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HomerSexual
Grandmaster Cheater Supreme
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| Posted: Sat Sep 22, 2007 5:31 am Post subject: |
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no because its long
its win32 gui...
its like 300+ lines
not some vb shit
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atom0s
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| Posted: Sat Sep 22, 2007 7:02 am Post subject: |
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Set your window as the canvas and create the bitmap on it.
A quick rundown:
| Code: |
BITMAPINFO canvas;
canvas.bmiHeader.biSize = sizeof(canvas.bmiHeader);
canvas.bmiHeader.biWidth = SIZE_OF_WINDOW-X;
canvas.bmiHeader.biHeight = -(signed int(SIZE_OF_WINDOW-Y));
canvas.bmiHeader.biPlanes = 1;
canvas.bmiHeader.biBitCount = 32;
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Then create the DC and set it to your window:
| Code: |
HDC canvashDC;
HBITMAP canvasBmp;
unsigned char* lpCanvasBuffer;
canvasDC = CreateCompatibleDC( GetWindowDC(YourWindowHandle) );
canvasBmp = CreateDIBSection( canvasDC, &canvas, DIB_RGB_COLORS, (LPVOID*)&lpCanvasBuffer, 0, 0 );
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Your bitmap is setup in pixels on the lpCanvasBuffer then. Pixels are setup like this:
* color[0] Blue
* color[1] Green
* color[2] Red
* color[3] Alpha
To clear the canvas buffer:
| Code: | | memset( (void*)lpCanvasBuffer, 0, WindowSizeX*WindowSizeY*4 ); |
To update the canvas:
| Code: |
PAINTSTRUCT ps;
HDC hDCDisplay = BeginPaint(YourWindowhWnd, &ps);
BitBlt(hDCDisplay, 0, 0, WindowSizeX, WindowSizeY, canvashDC, 0, 0, SRCCOPY);
EndPaint(YourWindowHwnd, &ps);
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Then plotting pixels:
| Code: |
void PutPixel( unsigned int x, unsigned int y, unsigned char r, unsigned char g, unsigned char b )
{
unsigned int iOffset = 0;
if( x >= 0 && x < WindowSizeX && y >= 0 && y < WindowSizeY )
{
iOffset = ( (y * WindowSizeX) + x );
lpCanvasBuffer[(iOffset * 4) ] = b;
lpCanvasBuffer[(iOffset * 4)+1] = g;
lpCanvasBuffer[(iOffset * 4)+2] = r;
}
}
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Hope that helps.
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Robotex
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Location: The pizza country!
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| Posted: Sat Sep 22, 2007 7:13 am Post subject: |
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1) you should increase COLOR_WINDOW with +1
2) try GetDesktopWindow() instead of GetDC(0)
3) use while(GetMessage(&Msg, NULL, 0, 0) > 0) because if an error happens, it will still loop
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