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);
}
STDMETHODIMP CDwGdiTextRenderer::DrawGlyphRun(
const FX_RECT& text_bbox,
__in_opt CFX_ClipRgn* pClipRgn,
__in_opt DWRITE_MATRIX const* pMatrix,
FLOAT baselineOriginX,
FLOAT baselineOriginY,
DWRITE_MEASURING_MODE measuringMode,
__in DWRITE_GLYPH_RUN const* glyphRun,
const COLORREF& textColor) {
HRESULT hr = S_OK;
if (pMatrix) {
hr = pRenderTarget_->SetCurrentTransform(pMatrix);
if (FAILED(hr)) {
return hr;
}
}
HDC hDC = pRenderTarget_->GetMemoryDC();
HBITMAP hBitmap = (HBITMAP)::GetCurrentObject(hDC, OBJ_BITMAP);
BITMAP bitmap;
GetObject(hBitmap, sizeof bitmap, &bitmap);
CFX_DIBitmap dib;
dib.Create(bitmap.bmWidth, bitmap.bmHeight,
bitmap.bmBitsPixel == 24 ? FXDIB_Rgb : FXDIB_Rgb32,
(uint8_t*)bitmap.bmBits);
dib.CompositeBitmap(text_bbox.left, text_bbox.top, text_bbox.Width(),
text_bbox.Height(), pBitmap_, text_bbox.left,
text_bbox.top, FXDIB_BLEND_NORMAL, nullptr);
hr = pRenderTarget_->DrawGlyphRun(baselineOriginX, baselineOriginY,
measuringMode, glyphRun, pRenderingParams_,
textColor);
if (FAILED(hr)) {
return hr;
}
pBitmap_->CompositeBitmap(text_bbox.left, text_bbox.top, text_bbox.Width(),
text_bbox.Height(), &dib, text_bbox.left,
text_bbox.top, FXDIB_BLEND_NORMAL, pClipRgn);
return hr;
}