void
DWriteContext::DrawText(HDC hdc, const WCHAR* text, int len,
int x, int y, int w, int h, int cellWidth, COLORREF color)
{
HRESULT hr = S_OK;
IDWriteBitmapRenderTarget *bmpRT = NULL;
// Skip when any fonts are not set.
if (mTextFormat == NULL)
return;
// Check possibility of zero divided error.
if (cellWidth == 0 || mDpiScaleX == 0.0f || mDpiScaleY == 0.0f)
return;
if (SUCCEEDED(hr))
hr = mGdiInterop->CreateBitmapRenderTarget(hdc, w, h, &bmpRT);
if (SUCCEEDED(hr))
{
IDWriteTextLayout *textLayout = NULL;
HDC memdc = bmpRT->GetMemoryDC();
BitBlt(memdc, 0, 0, w, h, hdc, x, y, SRCCOPY);
hr = mDWriteFactory->CreateGdiCompatibleTextLayout(
text, len, mTextFormat, PixelsToDipsX(w),
PixelsToDipsY(h), mDpiScaleX, NULL, TRUE, &textLayout);
if (SUCCEEDED(hr))
{
DWRITE_TEXT_RANGE textRange = { 0, (UINT32)len };
textLayout->SetFontWeight(mFontWeight, textRange);
textLayout->SetFontStyle(mFontStyle, textRange);
}
if (SUCCEEDED(hr))
{
GdiTextRenderer *renderer = new GdiTextRenderer(bmpRT,
mRenderingParams);
GdiTextRendererContext data = {
color,
PixelsToDipsX(cellWidth),
0.0f
};
textLayout->Draw(&data, renderer, 0, 0);
SafeRelease(&renderer);
}
BitBlt(hdc, x, y, w, h, memdc, 0, 0, SRCCOPY);
SafeRelease(&textLayout);
}
SafeRelease(&bmpRT);
}
virtual HRESULT STDMETHODCALLTYPE CreateGdiCompatibleTextLayout(
WCHAR const* string,
UINT32 stringLength,
IDWriteTextFormat* textFormat,
FLOAT layoutWidth,
FLOAT layoutHeight,
FLOAT pixelsPerDip,
DWRITE_MATRIX const* transform,
BOOL useGdiNatural,
IDWriteTextLayout** textLayout
)
{
return orig_this->CreateGdiCompatibleTextLayout(string, stringLength, textFormat, layoutWidth, layoutHeight, pixelsPerDip, transform, useGdiNatural, textLayout);
}