Function ILAPIENTRY ilutSetHBitmap

DevIL/src-ILUT/src/ilut_win32.cpp:435–501

ILboolean ILAPIENTRY ilutSetHBitmap(HBITMAP Bitmap)
{
#ifndef _WIN32_WCE
	BITMAPINFO	Info[2];
	HWND		hWnd;
	HDC			hDC;
	ILubyte		*Buffer1 = NULL, *Buffer2 = NULL;
	ILuint		i, j, PadSize, Bps;

	ilutCurImage = ilGetCurImage();
	if (ilutCurImage == NULL) {
		ilSetError(ILUT_ILLEGAL_OPERATION);
		return IL_FALSE;
	}

	hWnd = GetForegroundWindow();
	hDC = GetDC(hWnd);

	// Query the dimensions
	memset(&Info, 0, sizeof(BITMAPINFO));
	Info[0].bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
	GetDIBits(hDC, Bitmap, 0, 0, NULL, Info, DIB_RGB_COLORS);

	// @TODO:  Implement this shitz0rz!
	if (Info[0].bmiHeader.biBitCount < 24) {
		ReleaseDC(hWnd, hDC); //added 20040527
		return IL_FALSE;
	}

	Buffer1 = (ILubyte*)ialloc(Info[0].bmiHeader.biSizeImage);
	Buffer2 = (ILubyte*)ialloc(Info[0].bmiHeader.biSizeImage);
	if (Buffer1 == NULL || Buffer2 == NULL) {
		ReleaseDC(hWnd, hDC); //added 20040527
		ifree(Buffer1);
		ifree(Buffer2);
		return IL_FALSE;
	}

	//GetBitmapBits
	GetDIBits(hDC, Bitmap, 0, Info[0].bmiHeader.biHeight, Buffer1, Info, DIB_RGB_COLORS);

	Bps = Info[0].bmiHeader.biWidth * (Info[0].bmiHeader.biBitCount >> 3);
	PadSize = (4 - (Bps % 4)) % 4;

	// Remove the padding.
	for (i = 0, j = 0; i < Info[0].bmiHeader.biSizeImage; i += Bps + PadSize, j += Bps) {
		memcpy(Buffer2 + j, Buffer1 + i, Bps);
	}

	if (Info[0].bmiHeader.biBitCount == 24) {
		ilTexImage(Info[0].bmiHeader.biWidth, Info[0].bmiHeader.biHeight, 1, 
			(ILubyte)(Info[0].bmiHeader.biBitCount >> 3), IL_BGR, IL_UNSIGNED_BYTE, Buffer2);
	}
	else if (Info[0].bmiHeader.biBitCount == 32) {
		ilTexImage(Info[0].bmiHeader.biWidth, Info[0].bmiHeader.biHeight, 1, 
			(ILubyte)(Info[0].bmiHeader.biBitCount >> 3), IL_BGRA, IL_UNSIGNED_BYTE, Buffer2);
	}
	ilutCurImage->Origin = IL_ORIGIN_LOWER_LEFT;