C++ CG32bitImage::Blt方法代码示例

void CCommandLineDisplay::Paint (CG32bitImage &Dest)

//	Paint
//
//	Paint display

	{
	Update();

	//	Paint the cursor

	m_Buffer.Fill(m_rcCursor.left + 1, 
			m_rcCursor.top, 
			RectWidth(m_rcCursor) - 1, 
			RectHeight(m_rcCursor),
			(((m_iCounter % 30) < 20) ? INPUT_COLOR : BACK_COLOR));

	//	Redraw character under cursor
	if ((m_iCounter % 30) >= 20 && m_iCursorPos < m_sInput.GetLength())
		{
		CString sLine(m_sInput.GetASCIIZPointer() + m_iCursorPos, 1);
		m_Buffer.DrawText(m_rcCursor.left, m_rcCursor.top, m_pFonts->Console, INPUT_COLOR, sLine);
		}

	//	Blt

	Dest.Blt(0,
			0,
			RectWidth(m_rcRect),
			RectHeight(m_rcRect),
			200,
			m_Buffer,
			m_rcRect.left,
			m_rcRect.top);

	m_iCounter++;
	}

void CButtonBarDisplay::Paint (CG32bitImage &Dest)

//	Paint
//
//	Paint the bar

	{
	int i;

	//	Fill background

	Dest.Fill(m_rcRect.left,
			m_rcRect.top,
			RectWidth(m_rcRect),
			RectHeight(m_rcRect),
			BAR_COLOR);

	//	Get the images

	const CG32bitImage &Images = m_pButtons->GetImage();

	//	Paint each button

	for (i = 0; i < m_pButtons->GetCount(); i++)
		{
		RECT rcRect = m_pButtons->GetButtonRect(i);

		//	Skip invisible buttons

		if (!m_pButtons->GetVisible(i))
			continue;

		//	Paint the image

		RECT rcSrc;
		GetImageRect(i, (i == m_iSelected), &rcSrc);

		Dest.Blt(rcSrc.left,
				rcSrc.top,
				RectWidth(rcSrc),
				RectHeight(rcSrc),
				Images,
				rcRect.left,
				rcRect.top);

		//	Paint the button label

		int cxWidth = m_pFonts->SubTitle.MeasureText(m_pButtons->GetLabel(i), NULL);
		m_pFonts->SubTitle.DrawText(Dest,
				rcRect.left + (RectWidth(rcRect) - cxWidth) / 2,
				rcRect.top + BUTTON_LABEL_Y,
				CG32bitPixel(128,128,128),
				m_pButtons->GetLabel(i));

		//	Paint the description

		cxWidth = m_pFonts->Medium.MeasureText(m_pButtons->GetDescription(i), NULL);
		m_pFonts->Medium.DrawText(Dest,
				rcRect.left + (RectWidth(rcRect) - cxWidth) / 2,
				rcRect.top + BUTTON_DESCRIPTION_Y,
				CG32bitPixel(255,255,255),
				m_pButtons->GetDescription(i));
		}
	}

void CExtension::CreateIcon (int cxWidth, int cyHeight, CG32bitImage **retpIcon) const

//	CreateIcon
//
//	Creates a cover icon for the adventure. The caller is responsible for
//	freeing the result.

	{
	//	Load the image

	CG32bitImage *pBackground = GetCoverImage();
	if (pBackground == NULL || pBackground->GetWidth() == 0 || pBackground->GetHeight() == 0)
		{
		int cxSize = Min(cxWidth, cyHeight);
		*retpIcon = new CG32bitImage;
		(*retpIcon)->Create(cxSize, cxSize);
		return;
		}

	//	Figure out the dimensions of the icon based on the image size and the
	//	desired output.
	//
	//	If the background is larger than the icon size then we need to scale it.

	CG32bitImage *pIcon;
	if (pBackground->GetWidth() > cxWidth || pBackground->GetHeight() > cyHeight)
		{
		int xSrc, ySrc, cxSrc, cySrc;
		Metric rScale;

		//	If we have a widescreen cover image and we want a portrait or
		//	square icon, then we zoom in on the key part of the cover.

		if (pBackground->GetWidth() > 2 * pBackground->GetHeight())
			{
			rScale = (Metric)cyHeight / pBackground->GetHeight();

			cxSrc = (int)(cxWidth / rScale);
			xSrc = Min(pBackground->GetWidth() - cxSrc, pBackground->GetWidth() - (RIGHT_COVER_OFFSET + (cxSrc / 2)));

			ySrc = 0;
			cySrc = pBackground->GetHeight();
			}
		else
			{
			rScale = (Metric)cxWidth / pBackground->GetWidth();
			if (rScale * pBackground->GetHeight() > (Metric)cyHeight)
				rScale = (Metric)cyHeight / pBackground->GetHeight();

			xSrc = 0;
			ySrc = 0;
			cxSrc = pBackground->GetWidth();
			cySrc = pBackground->GetHeight();
			}

		//	Create the icon

		pIcon = new CG32bitImage;
		pIcon->CreateFromImageTransformed(*pBackground,
				xSrc,
				ySrc,
				cxSrc,
				cySrc,
				rScale,
				rScale,
				0.0);
		}

	//	Otherwise we center the image on the icon

	else
		{
		//	Create the icon

		pIcon = new CG32bitImage;
		pIcon->Create(cxWidth, cyHeight);

		//	Blt

		pIcon->Blt(0,
				0,
				pBackground->GetWidth(),
				pBackground->GetHeight(),
				*pBackground,
				(cxWidth - pBackground->GetWidth()) / 2,
				(cyHeight - pBackground->GetHeight()) / 2);
		}

	//	Done

	*retpIcon = pIcon;
	}