bool CGdiPlusImage::DrawImage(CDC* pDC)
{
//´´½¨ÆÁÄ»
ASSERT(pDC!=NULL);
if ( !pDC ) return false;
Bitmap bmp(m_rcDest.Width(), m_rcDest.Height());
Graphics* pGraphics = Graphics::FromImage(&bmp);
if ( !pGraphics ) return false;
GraphicsContainer Containter = pGraphics->BeginContainer();
pGraphics->SetSmoothingMode(SmoothingModeHighQuality);
SolidBrush bgbrush(Color(238, 243, 250));
pGraphics->FillRectangle(&bgbrush, 0, 0, m_rcDest.Width(), m_rcDest.Height());
if ( m_pImage )
{
//»ñÈ¡ÊôÐÔ
INT nImageWidth = m_pImage->GetWidth();
INT nImageHeight = m_pImage->GetHeight();
float fMin = 1.0F;
float fZoomRate = 1.0F;
bool bZoomOut = false;
int nXSrc = 0;
int nYSrc = 0;
if ( nImageWidth >= m_rcDest.Width() || nImageHeight >= m_rcDest.Height() )
{
float fXRate = 1.0F * m_rcDest.Width() / nImageWidth;
float fYRate = 1.0F * m_rcDest.Height() / nImageHeight;
fMin = min(fXRate, fYRate);
fZoomRate = max(nImageWidth * 1.0F / m_rcDest.Width(), nImageHeight * 1.0F / m_rcDest.Height());
bZoomOut = true;
}
int nDestWidth = fMin * nImageWidth;
int nDestHeight = fMin * nImageHeight;
//¹¹ÔìλÖÃ
RectF rcDrawRect;
rcDrawRect.X = m_rcDest.left + (m_rcDest.Width() - nDestWidth ) / 2;
rcDrawRect.Y = m_rcDest.top + (m_rcDest.Height() - nDestHeight ) / 2;
rcDrawRect.Width = nDestWidth;
rcDrawRect.Height = nDestHeight;
Matrix matrix;
CPoint pt(m_rcDest.Width() / 2, m_rcDest.Height() / 2);
PointF ptBase((float)pt.x, (float)pt.y);
//¾ØÕó±ä»»Òª×¢Òâ˳Ðò£¬ÏÈƽÒÆÔÚËõ·ÅºóÐýת
matrix.Translate((REAL)m_rcDest.left,(REAL)m_rcDest.top,MatrixOrderAppend);
//Ëõ·Å
if ( m_szZoom.cx != 1.0f || m_szZoom.cy != 1.0f )
{
ptBase.X += m_szZoom.cx;
ptBase.Y += m_szZoom.cy;
matrix.Translate(-ptBase.X,-ptBase.Y,MatrixOrderAppend);
matrix.Scale(m_szZoom.cx,m_szZoom.cy,MatrixOrderAppend);
matrix.Translate(ptBase.X,ptBase.Y,MatrixOrderAppend);
}
//Ðýת
if (m_nRotateAngle)
{
matrix.RotateAt((REAL)m_nRotateAngle,ptBase,MatrixOrderAppend);
}
pGraphics->SetTransform(&matrix);
//͸Ã÷¾ØÕó
ColorMatrix Matrix=
{
1.0f,0.0f,0.0f,0.0f,0.0f,
0.0f,1.0f,0.0f,0.0f,0.0f,
0.0f,0.0f,1.0f,0.0f,0.0f,
0.0f,0.0f,0.0f,m_cbAlphaDepth/255.0f,0.0f,
0.0f,0.0f,0.0f,0.0f,1.0f
};
//ÉèÖÃÊôÐÔ
ImageAttributes Attributes;
Attributes.SetColorMatrix(&Matrix,ColorMatrixFlagsDefault,ColorAdjustTypeBitmap);
//»æ»Í¼Ïñ
pGraphics->DrawImage(m_pImage, rcDrawRect, nXSrc, nYSrc, (REAL)nImageWidth - nXSrc * 2, (REAL)nImageHeight - nYSrc * 2, UnitPixel,&Attributes);
pGraphics->ResetTransform();
pGraphics->EndContainer(Containter);
} // if ( m_pImage )
// ´ÓÄڴ濽±´ÖÁÉ豸
Graphics graphicsreal(pDC->GetSafeHdc());
graphicsreal.DrawImage(&bmp, 0, 0, m_rcDest.Width(), m_rcDest.Height());
delete pGraphics;
pGraphics = NULL;
return true;
}
//╩Ф╩╜м╪оЯ
bool CGdiPlusImage::DrawImage(CDC * pDC, INT nXPos, INT nYPos)
{
//╪стьеп╤о
ASSERT(m_pImage!=NULL);
if (m_pImage==NULL) return false;
//╢╢╫╗фад╩
ASSERT(pDC!=NULL);
Graphics graphics(pDC->GetSafeHdc());
GraphicsContainer Containter = graphics.BeginContainer();
graphics.SetSmoothingMode(SmoothingModeHighQuality);
//╩Ях║йТпт
INT nImageWidth=m_pImage->GetWidth();
INT nImageHeight=m_pImage->GetHeight();
//╧╧тЛн╩жц
RectF rcDrawRect;
rcDrawRect.X=0;//(REAL)nXPos;
rcDrawRect.Y=0;//(REAL)nYPos;
rcDrawRect.Width=(REAL)nImageWidth;
rcDrawRect.Height=(REAL)nImageHeight;
Matrix matrix;
CPoint pt((nXPos+nImageWidth/2), (nYPos+nImageHeight/2));
PointF ptBase((float)pt.x,(float)pt.y);
//╬ьуС╠Д╩╩р╙в╒рБкЁпРё╛охф╫рфтзкУ╥е╨СпЩв╙
matrix.Translate((REAL)nXPos,(REAL)nYPos,MatrixOrderAppend);
//кУ╥е
if ( m_szZoom.cx != 1.0f || m_szZoom.cy != 1.0f )
{
ptBase.X += m_szZoom.cx;
ptBase.Y += m_szZoom.cy;
matrix.Translate(-ptBase.X,-ptBase.Y,MatrixOrderAppend);
matrix.Scale(m_szZoom.cx,m_szZoom.cy,MatrixOrderAppend);
matrix.Translate(ptBase.X,ptBase.Y,MatrixOrderAppend);
}
//пЩв╙
if (m_nRotateAngle)
{
matrix.RotateAt((REAL)m_nRotateAngle,ptBase,MatrixOrderAppend);
}
graphics.SetTransform(&matrix);
//м╦цВ╬ьуС
ColorMatrix Matrix=
{
1.0f,0.0f,0.0f,0.0f,0.0f,
0.0f,1.0f,0.0f,0.0f,0.0f,
0.0f,0.0f,1.0f,0.0f,0.0f,
0.0f,0.0f,0.0f,m_cbAlphaDepth/255.0f,0.0f,
0.0f,0.0f,0.0f,0.0f,1.0f
};
//иХжцйТпт
ImageAttributes Attributes;
Attributes.SetColorMatrix(&Matrix,ColorMatrixFlagsDefault,ColorAdjustTypeBitmap);
//╩Ф╩╜м╪оЯ
graphics.DrawImage(m_pImage,rcDrawRect,0,0,(REAL)nImageWidth,(REAL)nImageHeight,UnitPixel,&Attributes);
graphics.ResetTransform();
graphics.EndContainer(Containter);
return true;
}
//»æ»Í¼Ïñ
bool CGdiPlusImage::DrawImage(CDC * pDC, INT nXPos, INT nYPos)
{
//¼ÓÔØÅжÏ
//ASSERT(m_pImage!=NULL);
if (m_pImage==NULL) return false;
//´´½¨ÆÁÄ»
ASSERT(pDC!=NULL);
Graphics graphics(pDC->GetSafeHdc());
GraphicsContainer Containter = graphics.BeginContainer();
graphics.SetSmoothingMode(SmoothingModeHighQuality);
//»ñÈ¡ÊôÐÔ
INT nImageWidth=m_pImage->GetWidth();
INT nImageHeight=m_pImage->GetHeight();
//¹¹ÔìλÖÃ
RectF rcDrawRect;
rcDrawRect.X=0;//(REAL)nXPos;
rcDrawRect.Y=0;//(REAL)nYPos;
rcDrawRect.Width=(REAL)nImageWidth;
rcDrawRect.Height=(REAL)nImageHeight;
Matrix matrix;
CPoint pt((nXPos+nImageWidth/2), (nYPos+nImageHeight/2));
PointF ptBase((float)pt.x,(float)pt.y);
//¾ØÕó±ä»»Òª×¢Òâ˳Ðò£¬ÏÈƽÒÆÔÚËõ·ÅºóÐýת
matrix.Translate((REAL)nXPos,(REAL)nYPos,MatrixOrderAppend);
//Ëõ·Å
if ( m_szZoom.cx != 1.0f || m_szZoom.cy != 1.0f )
{
ptBase.X += m_szZoom.cx;
ptBase.Y += m_szZoom.cy;
matrix.Translate(-ptBase.X,-ptBase.Y,MatrixOrderAppend);
matrix.Scale(m_szZoom.cx,m_szZoom.cy,MatrixOrderAppend);
matrix.Translate(ptBase.X,ptBase.Y,MatrixOrderAppend);
}
//Ðýת
if (m_nRotateAngle)
{
matrix.RotateAt((REAL)m_nRotateAngle,ptBase,MatrixOrderAppend);
}
graphics.SetTransform(&matrix);
//͸Ã÷¾ØÕó
ColorMatrix Matrix=
{
1.0f,0.0f,0.0f,0.0f,0.0f,
0.0f,1.0f,0.0f,0.0f,0.0f,
0.0f,0.0f,1.0f,0.0f,0.0f,
0.0f,0.0f,0.0f,m_cbAlphaDepth/255.0f,0.0f,
0.0f,0.0f,0.0f,0.0f,1.0f
};
//ÉèÖÃÊôÐÔ
ImageAttributes Attributes;
Attributes.SetColorMatrix(&Matrix,ColorMatrixFlagsDefault,ColorAdjustTypeBitmap);
//»æ»Í¼Ïñ
graphics.DrawImage(m_pImage,rcDrawRect,0,0,(REAL)nImageWidth,(REAL)nImageHeight,UnitPixel,&Attributes);
graphics.ResetTransform();
graphics.EndContainer(Containter);
return true;
}