// *************************************************************
// GetImageAttributes()
// *************************************************************
Gdiplus::ImageAttributes* ImageHelper::GetImageAttributes(IImage* img)
{
if (!img) return NULL;
Gdiplus::ImageAttributes* attr = new Gdiplus::ImageAttributes();
attr->SetWrapMode(Gdiplus::WrapModeTileFlipXY);
VARIANT_BOOL useTransparency;
img->get_UseTransparencyColor(&useTransparency);
OLE_COLOR clr1, clr2;
img->get_TransparencyColor(&clr1);
img->get_TransparencyColor2(&clr2);
SetTransparency(*attr, useTransparency ? true : false, clr1, clr2);
Gdiplus::ColorMatrix m = GetColorMatrix(img);
attr->SetColorMatrix(&m);
Gdiplus::REAL gamma;
img->get_Gamma(&gamma);
attr->SetGamma(gamma);
return attr;
}
void CanvasGdiplus::RestoreLayer()
{
DCHECK(layers_.size());
CanvasLayer* layer = layers_.top();
layers_.pop();
DCHECK(layer);
Gdiplus::Graphics* current = GetCurrentGraphics();
Gdiplus::Bitmap* native_bitmap =
layer->mem_bitmap.GetNativeBitmap();
Gdiplus::ImageAttributes ia;
Gdiplus::ColorMatrix cm =
{
1.0, 0.0, 0.0, 0.0, 0.0,
0.0, 1.0, 0.0, 0.0, 0.0,
0.0, 0.0, 1.0, 0.0, 0.0,
0.0, 0.0, 0.0, (static_cast<float>(layer->alpha))/255, 0.0,
0.0, 0.0, 0.0, 0.0, 1.0
};
ia.SetColorMatrix(&cm);
Gdiplus::Rect destRect(layer->bounds.x(), layer->bounds.y(),
layer->bounds.width(), layer->bounds.height());
current->DrawImage(native_bitmap, destRect,
layer->bounds.x(), layer->bounds.y(),
layer->bounds.width(), layer->bounds.height(),
Gdiplus::UnitPixel, &ia);
delete layer;
}
void ImageAttributes::SetColorMatrix(const ColorMatrix* cm) {
Gdiplus::ColorMatrix gdiMatrix;
for(int a = 0; a < 5; a++) {
for(int b = 0; b < 5; b++) {
gdiMatrix.m[a][b] = cm->m[a][b];
}
}
Gdiplus::ImageAttributes* ia = reinterpret_cast<Gdiplus::ImageAttributes*>(_private);
ia->SetColorMatrix(&gdiMatrix);
}
void Splash::DrawPNG(PNG* lpPNG, ColorMatrix* cmMatrix)
{
// Check alpha
if(lpPNG->fAlpha <= 0.0f) return;
// Check cmMatrix for null
if(cmMatrix == NULL) cmMatrix = &ClrMatrix;
// Set alpha
cmMatrix->m[3][3] = lpPNG->fAlpha;
Gdiplus::ImageAttributes iaAttr;
iaAttr.SetColorMatrix(cmMatrix, ColorMatrixFlagsDefault, ColorAdjustTypeBitmap);
// Draw
_oGrphInf.graphics->DrawImage(lpPNG->GetImage(), *lpPNG->frcDest, lpPNG->frcSrc->X, lpPNG->frcSrc->Y, lpPNG->frcSrc->Width, lpPNG->frcSrc->Height, Gdiplus::UnitPixel, &iaAttr);
_oGrphInf.graphics->Flush();
}
// *************************************************************
// GetImageAttributes()
// *************************************************************
Gdiplus::ImageAttributes* ImageHelper::GetImageAttributes(float alpha, bool useTransparency, OLE_COLOR clr1, OLE_COLOR clr2)
{
Gdiplus::ImageAttributes* attr = new Gdiplus::ImageAttributes();
attr->SetWrapMode(Gdiplus::WrapModeTileFlipXY);
Gdiplus::ColorMatrix matrix;
ZeroMemory((void*)&matrix.m, 25 * sizeof(REAL));
for (int i = 0; i < 5; i++) matrix.m[i][i] = 1.0f;
matrix.m[3][3] = alpha;
attr->SetColorMatrix(&matrix);
SetTransparency(*attr, useTransparency, clr1, clr2);
return attr;
}
BOOL CDuiImgX::StretchBlt(HDC hdc,int x,int y,int nWid,int nHei,int xSrc,int ySrc,int nWidSrc,int nHeiSrc,BYTE byAlpha/*=0xFF*/)
{
if(IsEmpty()) return FALSE;
Gdiplus::Graphics graphics(hdc);
Gdiplus::ImageAttributes ImgAtt;
ImgAtt.SetWrapMode(Gdiplus::WrapModeTileFlipXY);
if(byAlpha!=0xFF)
{
Gdiplus::ColorMatrix ClrMatrix =
{
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, float(byAlpha)/0xFF, 0.0f,
0.0f, 0.0f, 0.0f, 0.0f, 1.0f
};
ImgAtt.SetColorMatrix(&ClrMatrix);
}
return S_OK==graphics.DrawImage(m_pImg,Gdiplus::Rect(x,y,nWid,nHei),xSrc,ySrc,nWidSrc,nHeiSrc,Gdiplus::UnitPixel,&ImgAtt);
}
//-----------------------------------------------------------------------------
void GdiplusDrawContext::drawBitmap (CBitmap* cbitmap, const CRect& dest, const CPoint& offset, float alpha)
{
alpha *= currentState.globalAlpha;
if (alpha == 0.f || pGraphics == 0)
return;
IPlatformBitmap* platformBitmap = cbitmap ? cbitmap->getPlatformBitmap () : 0;
GdiplusBitmap* gpb = platformBitmap ? dynamic_cast<GdiplusBitmap*> (platformBitmap) : 0;
Gdiplus::Bitmap* bitmap = gpb ? gpb->getBitmap () : 0;
if (bitmap)
{
GdiplusDrawScope drawScope (pGraphics, currentState.clipRect, getCurrentTransform ());
Gdiplus::ImageAttributes imageAtt;
if (alpha != 1.f)
{
// introducing the alpha blend matrix
Gdiplus::ColorMatrix colorMatrix =
{
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, alpha, 0.0f,
0.0f, 0.0f, 0.0f, 0.0f, 0.0f,
};
// create the imageattribute modifier
imageAtt.SetColorMatrix (&colorMatrix, Gdiplus::ColorMatrixFlagsDefault,
Gdiplus::ColorAdjustTypeBitmap);
#if 1
Gdiplus::Rect myDestRect(
(INT)dest.left,
(INT)dest.top,
(INT)dest.getWidth (),
(INT)dest.getHeight ());
pGraphics->DrawImage (
bitmap,
myDestRect,
(INT)offset.x,
(INT)offset.y,
(INT)dest.getWidth (),
(INT)dest.getHeight (),
Gdiplus::UnitPixel,
&imageAtt);
#else
// create a temporary bitmap to prevent OutOfMemory errors
Gdiplus::Bitmap myBitmapBuffer ((INT)dest.getWidth (), (INT)dest.getHeight (),PixelFormat32bppARGB);
// create a graphics context for the temporary bitmap
Gdiplus::Graphics* myGraphicsBuffer = Gdiplus::Graphics::FromImage (&myBitmapBuffer);
// copy the rectangle we want to paint to the temporary bitmap
Gdiplus::Rect myTransRect(
0,
0,
(INT)dest.getWidth (),
(INT)dest.getHeight ());
// transfer the bitmap (without modification by imageattr!)
myGraphicsBuffer->DrawImage (
bitmap,myTransRect,
(INT)offset.x,
(INT)offset.y,
(INT)dest.getWidth (),
(INT)dest.getHeight (),
Gdiplus::UnitPixel,
0);
// now transfer the temporary to the real context at the advised location
Gdiplus::Rect myDestRect (
(INT)dest.left,
(INT)dest.top,
(INT)dest.getWidth (),
(INT)dest.getHeight ());
// transfer from temporary bitmap to real context (with imageattr)
pGraphics->DrawImage (
&myBitmapBuffer,
myDestRect,
(INT)0,
(INT)0,
(INT)dest.getWidth (),
(INT)dest.getHeight (),
Gdiplus::UnitPixel,
&imageAtt);
// delete the temporary context of the temporary bitmap
delete myGraphicsBuffer;
#endif
}
else
{
Gdiplus::Rect myDestRect(
(INT)dest.left,
(INT)dest.top,
(INT)dest.getWidth (),
(INT)dest.getHeight ());
pGraphics->DrawImage (
bitmap,
myDestRect,
(INT)offset.x,
(INT)offset.y,
(INT)dest.getWidth (),
(INT)dest.getHeight (),
Gdiplus::UnitPixel,
0);
}
}
}
HRESULT CImageImpl::Render(HDC hDC, LPCRECT pDstRect, LPCRECT pSrcRect, LPCRECT pBoundRect)
{
USE_CLASS_DATA(CLASS_DATA_MEMBER_LIST);
UNREFERENCED_PARAMETER(pSrcRect);
UNREFERENCED_PARAMETER(pBoundRect);
if (m_pImage == NULL)
return S_FALSE;
BOOL bGray = m_pImage->IsGrayScale();
UINT uFrames = 0;
if (S_OK == GetNumFrames(&uFrames) && uFrames > 1)
{
if (bGray)
{
//填充白色
HBRUSH hBrush = ::CreateSolidBrush(RGB(255, 255, 255));
::FillRect(hDC, pDstRect, hBrush);
::DeleteObject(hBrush);
try
{
//去alpha矩阵，未实现
static Gdiplus::ColorMatrix removeAlphaMatrix =
{
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, 1.0f, 0.0f,
0.0f, 0.0f, 0.0f, 0.0f, 1.0f,
};
//去色矩阵
static Gdiplus::ColorMatrix grayMatrix =
{
0.3f, 0.3f, 0.3f, 0.0f, 0.0f,
0.59f, 0.59f, 0.59f, 0.0f, 0.0f,
0.11f, 0.11f, 0.11f, 0.0f, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f, 0.0f,
0.0f, 0.0f, 0.0f, 0.0f, 1.0f,
};
//选择第一帧
GUID guidGif = Gdiplus::FrameDimensionTime;
m_pBitmap->SelectActiveFrame(&guidGif, 0);
CRect dstRect = *pDstRect;
Gdiplus::Rect rcDraw(dstRect.left, dstRect.top, (dstRect.right - dstRect.left), (dstRect.bottom - dstRect.top));
Gdiplus::Graphics graphics(hDC);
Gdiplus::ImageAttributes *pImageAttributes = new Gdiplus::ImageAttributes();
pImageAttributes->SetColorMatrix(&grayMatrix);
Gdiplus::Status ret = graphics.DrawImage(m_pBitmap,
rcDraw,
0, 0, m_pBitmap->GetWidth(), m_pBitmap->GetHeight(),
Gdiplus::UnitPixel, pImageAttributes);
delete pImageAttributes;
if (ret == Gdiplus::Ok)
return S_OK;
}
catch (...)
{
}
}
else
{
//填充白色
::FillRect(hDC, pDstRect, (HBRUSH)::GetStockObject(WHITE_BRUSH));
if (S_OK == RenderFrame(hDC, 0, pDstRect))
return S_OK;
}
}
if (! m_pImage->AlphaIsValid())
{
if (! m_pImage->Stretch(hDC, *pDstRect))
return S_FALSE;
}
else
{
if (! m_pImage->Draw(hDC, *pDstRect))
return S_FALSE;
}
return S_OK;
}