// --------------------------------------------------------------
GFontWin32GDIPlus::GFontWin32GDIPlus( Font* nativeFont, const char * faceName,
int size, int properties)
: mNativeFont(nativeFont), mName(faceName),
mSize(size), mFontProp(properties)
{
DWORD count = (DWORD)mbstowcs(NULL, faceName, strlen(faceName));
WCHAR * wstr = (WCHAR*) malloc ((count + 1) * sizeof(WCHAR));
mbstowcs(wstr, faceName, strlen(faceName));
FontCollection fc;
FontFamily ff (wstr, &fc);
int style;
switch (properties) {
case kFontBold:
style = FontStyleBold;
break;
case kFontItalic:
style = FontStyleItalic;
break;
case kFontBold+kFontItalic:
style = FontStyleBoldItalic;
break;
case kFontUnderline:
style = FontStyleUnderline;
break;
default:
style = FontStyleRegular;
}
mEmHeight = ff.GetEmHeight(style);
float ratio = mEmHeight ? (float)mEmHeight / size : 1.f;
mAscent = ff.GetCellAscent(style) / ratio;
mDescent = ff.GetCellDescent(style) / ratio;
free (wstr);
}
boolean gdiplus_textlayout(textpara_t *para, char **fontpath)
{
/* ensure GDI+ is started up: since we get called outside of a job, we can't rely on GDI+ startup then */
UseGdiplus();
Layout* layout = new Layout(para->fontname, para->fontsize, para->str);
/* measure the text */
/* NOTE: use TextRenderingHintAntiAlias + GetGenericTypographic to get a layout without extra space at beginning and end */
RectF boundingBox;
DeviceContext deviceContext;
Graphics measureGraphics(deviceContext.hdc);
measureGraphics.SetTextRenderingHint(TextRenderingHintAntiAlias);
measureGraphics.MeasureString(
&layout->text[0],
layout->text.size(),
layout->font,
PointF(0.0f, 0.0f),
GetGenericTypographic(),
&boundingBox);
FontFamily fontFamily;
layout->font->GetFamily(&fontFamily);
int style = layout->font->GetStyle();
para->layout = (void*)layout;
para->free_layout = &gdiplus_free_layout;
para->width = boundingBox.Width;
para->height = layout->font->GetHeight(&measureGraphics);
para->yoffset_layout = fontFamily.GetCellAscent(style) * para->fontsize / fontFamily.GetEmHeight(style); /* convert design units to pixels */
para->yoffset_centerline = 0;
return TRUE;
};