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Home » U++ Library support » RichText,QTF,RTF... » Font alignment issues
Re: Font alignment issues [message #22631 is a reply to message #22624] Sun, 02 August 2009 09:01 Go to previous messageGo to previous message
mirek is currently offline  mirek
Messages: 14261
Registered: November 2005
Ultimate Member
Possible way to check the theory (removes "paint text with single call to X11" optimization):

void Draw::DrawText(int x, int y, int angle, const wchar *text, Font font,
		            Color ink, int n, const int *dx)
{
	if(IsNull(ink)) return;
	if(n < 0)
		n = wstrlen(text);
	Std(font);
	double sina;
	double cosa;
	int    d = 0;
	if(angle)
		Draw::SinCos(angle, sina, cosa);
	for(int i = 0; i < n; i++) {
		wchar chr = text[i];
		GlyphInfo gi = GetGlyphInfo(font, chr);
		if(gi.IsNormal())
		      DrawTextOp(int(x + cosa * d), int(y - sina * d), angle, &chr, font, ink, 1, NULL);
		else
		if(gi.IsReplaced()) {
			Font fnt = font;
			fnt.Face(gi.lspc);
			fnt.Height(gi.rspc);
			if(angle)
				DrawTextOp(int(x + cosa * d), int(y - sina * (font.GetAscent() - fnt.GetAscent() + d)),
				             angle, &chr, fnt, ink, 1, NULL);
			else
				DrawTextOp(x + d, y + font.GetAscent() - fnt.GetAscent(), 0, &chr, fnt, ink, 1, NULL);
			GlyphMetrics(gi, font, chr);
		}
		else
		if(gi.IsComposed()) {
			ComposedGlyph cg;
			Compose(font, chr, cg);
			if(angle) {
				DrawTextOp(int(x + cosa * d), int(y - sina * d), angle, &cg.basic_char, font, ink, 1, NULL);
				DrawTextOp(int(x + cosa * (d + cg.mark_pos.x)), int(y - sina * (cg.mark_pos.y + d)), angle, &cg.mark_char, cg.mark_font, ink, 1, NULL);
			}
			else {
				DrawTextOp(x + d, y, 0, &cg.basic_char, font, ink, 1, NULL);
				DrawTextOp(x + cg.mark_pos.x + d, y + cg.mark_pos.y, 0, &cg.mark_char, cg.mark_font, ink, 1, NULL);
			}
			GlyphMetrics(gi, font, chr);
		}
		d += dx ? *dx++ : gi.width;
	}
}


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