[Mono-winforms-list] [Mono-dev] libgdiplus pango patch

Jonathan Anderson jonathan.l.anderson at gmail.com
Fri Mar 6 08:12:01 EST 2009


Sorry for the long delay.  I don't have write access to svn, so I'll 
need someone to commit it for me, or to get access to do so.

I'm still doing work in this area - right now I'm working with the 
issues for complex scripts in the TextBox and similar edit controls.

Thanks,
Jonathan

Sebastien Pouliot wrote:
> Hello Jonathan,
> 
> On Thu, 2009-02-12 at 21:47 +0700, Jonathan Anderson wrote:
>> Sebastien Pouliot wrote:
>>>> There are a couple of issues that I've fixed since the patch I submitted 
>>>> as well (fixed a problem with vertical text and another difference with 
>>>> how MS GDI+ handles the NoWrap flag).  Should I do another patch with 
>>>> everything again, or just a patch on the patched version for those?
>>> You can issue a new, complete patch.
> 
> Sorry for the delay, I wanted to try it (out of curiosity) but did not
> have time yet. Anyway this should not block getting the source into SVN.
> 
> Besides a few spaces/tabs issues (see inline) everything looks fine and
> since pango-support is not part of the default build please feel free*
> to commit your changes along with the ChangeLog.
> 
> * as long as it does not touch the "main" source files and it follow the
> mono source conventions.
> 
> Thanks!
> Sebastien
> 
>> Here's the new patch.  Fixes from the previous one:
>> * vertical latin text is now drawn with characters in the correct direction
>> * NoWrap will still wrap on newline now (MS GDI+ does this)
>>
>> Jonathan Anderson
>> plain text document attachment (pangopatch2.diff)
>> Index: src/text-pango-private.h
>> ===================================================================
>> --- src/text-pango-private.h	(revision 126715)
>> +++ src/text-pango-private.h	(working copy)
>> @@ -36,17 +36,18 @@
>>  #include "graphics-private.h"
>>  #include "stringformat-private.h"
>>  
>> +#define PANGO_MAX (G_MAXINT / PANGO_SCALE)
>> +#define MAKE_SAFE_FOR_PANGO(x)	((x) > G_MAXINT/PANGO_SCALE ? G_MAXINT/PANGO_SCALE : ((x) < G_MININT/PANGO_SCALE ? G_MININT/PANGO_SCALE : (x)))
>>  
>>  #define	GDIP_WINDOWS_ACCELERATOR	'&'
>> -#define GDIP_PANGOHACK_ACCELERATOR	((char)1)
>>  
>>  #define text_DrawString			pango_DrawString
>>  #define text_MeasureString		pango_MeasureString
>>  #define text_MeasureCharacterRanges	pango_MeasureCharacterRanges
>>  
>>
>> -PangoLayout* gdip_pango_setup_layout (cairo_t *ct, GDIPCONST WCHAR *stringUnicode, int length, GDIPCONST GpFont *font, 
>> -	GDIPCONST RectF *rc, RectF *box, GDIPCONST GpStringFormat *format);
>> +PangoLayout* gdip_pango_setup_layout (GpGraphics *graphics, GDIPCONST WCHAR *stringUnicode, int length, GDIPCONST GpFont *font, 
>> +	GDIPCONST RectF *rc, RectF *box, GDIPCONST GpStringFormat *format, int **charsRemoved);
>>  
>>  GpStatus pango_DrawString (GpGraphics *graphics, GDIPCONST WCHAR *stringUnicode, int length, GDIPCONST GpFont *font, 
>>  	GDIPCONST RectF *rc, GDIPCONST GpStringFormat *format, GpBrush *brush) GDIP_INTERNAL;
>> Index: src/text-pango.c
>> ===================================================================
>> --- src/text-pango.c	(revision 126715)
>> +++ src/text-pango.c	(working copy)
>> @@ -46,45 +46,151 @@
>>  	return list;
>>  }
>>  
>> -static void
>> -gdip_process_accelerators (gchar *text, int length, PangoAttrList *list)
>> +void
>> +gdip_set_array_values (int *array, int value, int num)
>>  {
>>  	int i;
>> -	for (i = 0; i < length; i++) {
>> -		if (*(text + i) == GDIP_WINDOWS_ACCELERATOR) {
>> -			/* don't show the prefix character */
>> -			*(text + i) = GDIP_PANGOHACK_ACCELERATOR;
>> -			/* if the next character is an accelerator then skip over it (&& == &) */
>> -			if ((i < length - 1) && (*(text + i + 1) == GDIP_WINDOWS_ACCELERATOR)) {
>> -				i++;
>> -			} else if (list) {
>> -				/* add an attribute on the next character */
>> +	for (i = 0; i < num; i++)
>> +		array [i] = value;
>> +}
>> +
>> +static GString *
>> +gdip_process_string (gchar *text, int length, int removeAccelerators, int trimSpace, PangoAttrList *list, int **charsRemoved)
>> +{
>> +	int i, j;
>> +	int nonws = 0;
>> +	gchar *iter;
>> +	gchar *iter2;
>> +	gunichar ch;
>> +    GString *res = g_string_sized_new (length);
> 
> ^ space/tab issue
> 
>> +
>> +	/* fast version: just check for final newline and remove */
>> +	if (!removeAccelerators && !trimSpace) {
>> +		j = length;
>> +		if (j > 0 && text [j-1] == '\n') {
>> +			j--;
>> +			if (j > 0 && text [j-1] == '\r')
>> +				j--;
>> +		}
>> +		g_string_append_len (res, text, j);
>> +		if (j == 0 && length > 0) {
>> +			g_string_append_c (res, ' ');
>> +			j++;
>> +		}
>> +		if (charsRemoved && *charsRemoved) {
>> +			int prevj = (g_utf8_prev_char (res->str + j) - res->str);
>> +			gdip_set_array_values (*charsRemoved + prevj, length - j, j - prevj);
>> +		}
>> +		return res;
>> +	}
>> +
>> +	iter = text;
>> +	i = 0;
>> +	j = 0;
>> +	while (iter - text < length) {
>> +		ch = g_utf8_get_char (iter);
>> +		if (ch == GDIP_WINDOWS_ACCELERATOR && removeAccelerators && (iter - text < length - 1)) {
>> +			nonws = 1;
>> +			iter2 = g_utf8_next_char (iter);
>> +			i += iter2 - iter;
>> +			iter = iter2;
>> +			ch = g_utf8_get_char (iter);
>> +			/* add an attribute on the next character */
>> +			if (list && (iter - text < length) && (ch != GDIP_WINDOWS_ACCELERATOR)) {
>>  				PangoAttribute *attr = pango_attr_underline_new (PANGO_UNDERLINE_LOW);
>> -				attr->start_index = i + 1;
>> -				attr->end_index = i + 2;
>> +				attr->start_index = j;
>> +				attr->end_index = j + g_utf8_next_char (iter) - iter;
>>  				pango_attr_list_insert (list, attr);
>>  			}
>> +		} else if (!g_unichar_isspace (ch)) {
>> +			nonws = 1;
>> +		} else if (trimSpace && ch != '\r' && ch != '\n') {
>> +			/* unless specified we don't consider the trailing spaces, unless there is just one space (#80680) */
>> +			for (iter2 = g_utf8_next_char (iter); iter2 - text < length; iter2 = g_utf8_next_char (iter2)) {
>> +				ch = g_utf8_get_char (iter2);
>> +				if (ch == '\r' || ch == '\n')
>> +					break;
>> +				if (!g_unichar_isspace (ch)) {
>> +					g_string_append_len (res, iter, iter2 - iter);
>> +					if (charsRemoved && *charsRemoved)
>> +						gdip_set_array_values ((*charsRemoved)+j, i - j, iter2 - iter);
>> +					j += iter2 - iter;
>> +					break;
>> +				}
>> +			}
>> +			i += iter2 - iter;
>> +			iter = iter2;
>> +			continue;
>> +		} else if ((ch == '\r' && (iter - text == length - 2) && (*g_utf8_next_char (iter) == '\n')) || (ch == '\n' && iter - text == length - 1)) {
>> +			/* in any case, ignore a final newline as pango will add an extra line to the measurement while gdi+ does not */
>> +			i = length;
>> +			break;
>>  		}
>> +		iter2 = g_utf8_next_char (iter);
>> +		g_string_append_len (res, iter, iter2 - iter);
>> +		/* save these for string lengths later */
>> +		if (charsRemoved && *charsRemoved)
>> +			gdip_set_array_values ((*charsRemoved)+j, i - j, iter2 - iter);
>> +		j += iter2 - iter;
>> +		i += iter2 - iter;
>> +		iter = iter2;
>>  	}
>> +	/* always ensure that at least one space is measured */
>> +	if (!nonws && trimSpace) {
>> +		g_string_append_c (res, ' ');
>> +		j++;
>> +	}
>> +	if (charsRemoved && *charsRemoved && j > 0) {
>> +		int prevj = (g_utf8_prev_char (res->str + j) - res->str);
>> +		gdip_set_array_values (*charsRemoved + prevj, i - j, j - prevj);
>> +	}
>> +	return res;
>>  }
>>  
>>  PangoLayout*
>> -gdip_pango_setup_layout (cairo_t *ct, GDIPCONST WCHAR *stringUnicode, int length, GDIPCONST GpFont *font, 
>> -	GDIPCONST RectF *rc, RectF *box, GDIPCONST GpStringFormat *format)
>> +gdip_pango_setup_layout (GpGraphics *graphics, GDIPCONST WCHAR *stringUnicode, int length, GDIPCONST GpFont *font, 
>> +	GDIPCONST RectF *rc, RectF *box, GDIPCONST GpStringFormat *format, int **charsRemoved)
>>  {
>>  	GpStringFormat *fmt;
>>  	PangoLayout *layout;
>>  	PangoContext *context;
>> -	PangoMatrix matrix = PANGO_MATRIX_INIT;
>> -	PangoRectangle logical;
>> +	PangoRectangle logical;   /* logical size of text (used for alignment) */
>> +	PangoRectangle ink;       /* ink size of text (to pixel boundaries) */
>>  	PangoAttrList *list = NULL;
>> +    GString *ftext;
> 
> ^ space/tab issue
> 
>> +	PangoTabArray *tabs;
>> +	PangoLayoutIter *iter;
>> +	int i;
>> +	int FrameWidth;     /* rc->Width (or rc->Height if vertical) */
>> +	int FrameHeight;    /* rc->Height (or rc->Width if vertical) */
>> +	int FrameX;         /* rc->X (or rc->Y if vertical) */
>> +	int FrameY;         /* rc->Y (or rc->X if vertical) */
>> +	int y0;             /* y0,y1,clipNN used for checking line positions vs. clip rectangle */
>> +	int y1;
>> +	double clipx1;
>> +	double clipx2;
>> +	double clipy1;
>> +	double clipy2;
>> +	int trimSpace;      /* whether or not to trim the space */
>>  
>>  	gchar *text = ucs2_to_utf8 (stringUnicode, length);
>>  	if (!text)
>>  		return NULL;
>> +    length = strlen (text);
> 
> ^ space/tab issue
> 
>> -//g_warning ("layout >%s< (%d) [x %g, y %g, w %g, h %g] [font %s, %g points]", text, length, rc->X, rc->Y, rc->Width, rc->Height, font->face, font->emSize);
>> +	if (charsRemoved) {
>> +		(*charsRemoved) = GdipAlloc (sizeof (int) * length);
>> +		if (!*charsRemoved) {
>> +			GdipFree (text);
>> +			return NULL;
>> +		}
>> +		memset (*charsRemoved, 0, sizeof (int) * length);
>> +	}
>>  
>> +	/* TODO - Digit substitution */
>> +
>> +// g_warning ("layout >%s< (%d) [x %g, y %g, w %g, h %g] [font %s, %g points]", text, length, rc->X, rc->Y, rc->Width, FrameHeight, font->face, font->emSize);
>> +
>>  	/* a NULL format is valid, it means get the generic default values (and free them later) */
>>  	if (!format) {
>>  		GpStatus status = GdipStringFormatGetGenericDefault ((GpStringFormat **)&fmt);
>> @@ -96,36 +202,46 @@
>>  		fmt = (GpStringFormat *)format;
>>  	}
>>  
>> -	/* unless specified we don't consider the trailing spaces, unless there is just one space (#80680) */
>> -	if ((fmt->formatFlags & StringFormatFlagsMeasureTrailingSpaces) == 0) {
>> -		while ((length > 0) && (isspace (*(text + length - 1))))
>> -			length--;
>> -		if (length == 0)
>> -			length = 1;
>> -	}
>> +	layout = pango_cairo_create_layout (graphics->ct);
>>  
>> -	layout = pango_cairo_create_layout (ct);
>> -
>>  	/* context is owned by Pango (i.e. not referenced counted) do not free */
>>  	context = pango_layout_get_context (layout);
>>  
>>  	pango_layout_set_font_description (layout, gdip_get_pango_font_description ((GpFont*) font));
>>  
>> -	if ((rc->Width <= 0.0) || (fmt->formatFlags & StringFormatFlagsNoWrap)) {
>> +	if (fmt->formatFlags & StringFormatFlagsDirectionVertical) {
>> +		FrameWidth = MAKE_SAFE_FOR_PANGO (SAFE_FLOAT_TO_UINT32 (rc->Height));
>> +		FrameHeight = MAKE_SAFE_FOR_PANGO (SAFE_FLOAT_TO_UINT32 (rc->Width));
>> +		FrameX = SAFE_FLOAT_TO_UINT32 (rc->Y);
>> +		FrameY = SAFE_FLOAT_TO_UINT32 (rc->X);
>> +	} else {
>> +		FrameWidth = MAKE_SAFE_FOR_PANGO (SAFE_FLOAT_TO_UINT32 (rc->Width));
>> +		FrameHeight = MAKE_SAFE_FOR_PANGO (SAFE_FLOAT_TO_UINT32 (rc->Height));
>> +		FrameX = SAFE_FLOAT_TO_UINT32 (rc->X);
>> +		FrameY = SAFE_FLOAT_TO_UINT32 (rc->Y);
>> +	}
>> +	//g_warning("FW: %d\tFH: %d", FrameWidth, FrameHeight);
>> +
>> +	if ((FrameWidth <= 0) || (fmt->formatFlags & StringFormatFlagsNoWrap)) {
>>  		pango_layout_set_width (layout, -1);
>> +		//g_warning ("Setting width: %d", -1);
>>  	} else {
>> -		/* minus one to deal with our AA offset */
>> -		int width = rc->Width - 1;
>> -		/* TODO incomplete (missing height adjustment) */
>> -		if ((fmt->formatFlags & StringFormatFlagsNoFitBlackBox) == 0)
>> -			width -= 2;
>> -		pango_layout_set_width (layout, width * PANGO_SCALE);
>> +		pango_layout_set_width (layout, FrameWidth * PANGO_SCALE);
>> +		//g_warning ("Setting width: %d", FrameWidth * PANGO_SCALE);
>>  	}
>> +
>> +	if ((rc->Width != 0) && (rc->Height != 0) && ((fmt->formatFlags & StringFormatFlagsNoClip) == 0)) {
>> +// g_warning ("\tclip [%g %g %g %g]", rc->X, rc->Y, rc->Width, rc->Height);
>> +		/* We do not call cairo_reset_clip because we want to take previous clipping into account */
>> +		/* Use rc instead of frame variables because this is pre-transform */
>> +		gdip_cairo_rectangle (graphics, rc->X, rc->Y, rc->Width, rc->Height, TRUE);
>> +		cairo_clip (graphics->ct);
>> +	}
>>  	
>> -	if (fmt->formatFlags & StringFormatFlagsDirectionRightToLeft) {
>> -		/* with GDI+ the API not the renderer makes the direction decision */
>> -		pango_layout_set_auto_dir (layout, FALSE);
>> -		pango_context_set_base_dir (context, PANGO_DIRECTION_RTL);
>> +	/* with GDI+ the API not the renderer makes the direction decision */
>> +	pango_layout_set_auto_dir (layout, FALSE);
>> +	if (!(fmt->formatFlags & StringFormatFlagsDirectionRightToLeft) != !(fmt->formatFlags & StringFormatFlagsDirectionVertical)) {
>> +		pango_context_set_base_dir (context, PANGO_DIRECTION_WEAK_RTL);
>>  		pango_layout_context_changed (layout);
>>  
>>  		/* horizontal alignment */
>> @@ -141,6 +257,8 @@
>>  			break;
>>  		}
>>  	} else {
>> +		/* pango default base dir is WEAK_LTR, which is what we want */
>> +
>>  		/* horizontal alignment */
>>  		switch (fmt->alignment) {
>>  		case StringAlignmentNear:
>> @@ -158,9 +276,18 @@
>>  #ifdef PANGO_VERSION_CHECK
>>  #if PANGO_VERSION_CHECK(1,16,0)
>>  	if (fmt->formatFlags & StringFormatFlagsDirectionVertical) {
>> +		if (fmt->formatFlags & StringFormatFlagsDirectionRightToLeft) {
>> +			cairo_rotate (graphics->ct, M_PI/2.0);
>> +			cairo_translate (graphics->ct, 0, -FrameHeight);
>> +			pango_cairo_update_context (graphics->ct, context);
>> +		} else {
>> +			cairo_rotate (graphics->ct, 3.0*M_PI/2.0);
>> +			cairo_translate (graphics->ct, -FrameWidth, 0);
>> +			pango_cairo_update_context (graphics->ct, context);
>> +		}
>>  		/* only since Pango 1.16 */
>> -		pango_context_set_base_gravity (context, PANGO_GRAVITY_EAST);
>> -		pango_context_set_gravity_hint (context, PANGO_GRAVITY_HINT_STRONG);
>> +		pango_context_set_base_gravity (context, PANGO_GRAVITY_AUTO);
>> +		pango_context_set_gravity_hint (context, PANGO_GRAVITY_HINT_LINE);
>>  		pango_layout_context_changed (layout);
>>  	}
>>  #endif
>> @@ -169,38 +296,27 @@
>>  	/* TODO - StringFormatFlagsDisplayFormatControl
>>  		scan and replace them ??? */
>>  
>> -	/* TODO - StringFormatFlagsLineLimit */
>> -
>> -	if ((rc->Width != 0) && (rc->Height != 0) && ((fmt->formatFlags & StringFormatFlagsNoClip) == 0)) {
>> -//g_warning ("\tclip [%g %g %g %g]", rc->X, rc->Y, rc->Width, rc->Height);
>> -		/* We do not call cairo_reset_clip because we want to take previous clipping into account */
>> -		cairo_rectangle (ct, rc->X, rc->Y, rc->Width + 0.5, rc->Height + 0.5);
>> -		cairo_clip (ct);
>> -	}
>> -
>> +	/* Trimming options seem to apply only to the end of the string - gdi+ will still wrap 
>> +	 * with preference to word first, then character.  Unfortunately, pango doesn't have
>> +	 * any way to differentiate wrapping behavior from trimming behavior that I could find */
>> +	pango_layout_set_wrap (layout, PANGO_WRAP_WORD_CHAR);
>>  	switch (fmt->trimming) {
>>  	case StringTrimmingNone:
>> -		pango_layout_set_wrap (layout, PANGO_WRAP_WORD_CHAR);
>>  		pango_layout_set_ellipsize (layout, PANGO_ELLIPSIZE_NONE);
>>  		break;
>>  	case StringTrimmingCharacter:
>> -		pango_layout_set_wrap (layout, PANGO_WRAP_CHAR);
>>  		pango_layout_set_ellipsize (layout, PANGO_ELLIPSIZE_NONE);
>>  		break;
>>  	case StringTrimmingWord:
>> -		pango_layout_set_wrap (layout, PANGO_WRAP_WORD);
>>  		pango_layout_set_ellipsize (layout, PANGO_ELLIPSIZE_NONE);
>>  		break;
>>  	case StringTrimmingEllipsisCharacter:
>> -		pango_layout_set_wrap (layout, PANGO_WRAP_CHAR);
>>  		pango_layout_set_ellipsize (layout, PANGO_ELLIPSIZE_END);
>>  		break;
>>  	case StringTrimmingEllipsisWord:
>> -		pango_layout_set_wrap (layout, PANGO_WRAP_WORD);
>>  		pango_layout_set_ellipsize (layout, PANGO_ELLIPSIZE_END);
>>  		break;
>>  	case StringTrimmingEllipsisPath:
>> -		pango_layout_set_wrap (layout, PANGO_WRAP_WORD_CHAR);
>>  		pango_layout_set_ellipsize (layout, PANGO_ELLIPSIZE_MIDDLE);
>>  		break;
>>  	}
>> @@ -233,59 +349,138 @@
>>  		}
>>  	}
>>  
>> +	if (fmt->numtabStops > 0) {
>> +		float tabPosition;
>> +		tabs = pango_tab_array_new (fmt->numtabStops, TRUE);
>> +		tabPosition = fmt->firstTabOffset;
>> +		for (i = 0; i < fmt->numtabStops; i++) {
>> +			tabPosition += fmt->tabStops[i];
>> +			pango_tab_array_set_tab (tabs, i, PANGO_TAB_LEFT, (gint)min (tabPosition, PANGO_MAX) * PANGO_SCALE);
>> +		}
>> +		pango_layout_set_tabs (layout, tabs);
>> +		pango_tab_array_free (tabs);
>> +	}
>> +
>> +	//g_warning ("length before ws removal: %d", length);
>> +	trimSpace = (fmt->formatFlags & StringFormatFlagsMeasureTrailingSpaces) == 0;
>>  	switch (fmt->hotkeyPrefix) {
>>  	case HotkeyPrefixHide:
>>  		/* we need to remove any accelerator from the string */
>> -		gdip_process_accelerators (text, length, NULL);
>> +		ftext = gdip_process_string (text, length, 1, trimSpace, NULL, charsRemoved);
>>  		break;
>>  	case HotkeyPrefixShow:
>>  		/* optimization: is seems that we never see the hotkey when using an underline font */
>>  		if (font->style & FontStyleUnderline) {
>>  			/* so don't bother drawing it (and simply add the '&' character) */
>> -			gdip_process_accelerators (text, length, NULL);
>> +			ftext = gdip_process_string (text, length, 1, trimSpace, NULL, charsRemoved);
>>  		} else {
>>  			/* find accelerator and add attribute to the next character (unless it's the prefix too) */
>>  			if (!list)
>>  				list = gdip_get_layout_attributes (layout);
>> -			gdip_process_accelerators (text, length, list);
>> +			ftext = gdip_process_string (text, length, 1, trimSpace, list, charsRemoved);
>>  		}
>>  		break;
>>  	default:
>> +		ftext = gdip_process_string (text, length, 0, trimSpace, NULL, charsRemoved);
>>  		break;
>>  	}
>> +	length = ftext->len;
>> +	//g_warning ("length after ws removal: %d", length);
>>  
>>  	if (list) {
>>  		pango_layout_set_attributes (layout, list);
>>  		pango_attr_list_unref (list);
>>  	}
>>  
>> -	pango_layout_set_text (layout, text, length);
>> +// g_warning("\tftext>%s< (%d)", ftext->str, -1);
>> +	pango_layout_set_text (layout, ftext->str, ftext->len);
>>  	GdipFree (text);
>> +    g_string_free (ftext, TRUE);
> 
> ^ tab/space
> 
>>  
>> -	pango_layout_get_pixel_extents (layout, NULL, &logical);
>> -//g_warning ("\tlogical\t[x %d, y %d, w %d, h %d]", logical.x, logical.y, logical.width, logical.height);
>> +	/* Trim the text after the last line for ease of counting lines/characters */
>> +	/* Also prevents drawing whole lines outside the boundaries if NoClip was specified */
>> +	/* In case of pre-existing clipping, use smaller of clip rectangle or our specified height */
>> +	if (FrameHeight > 0) {
>> +		cairo_clip_extents (graphics->ct, &clipx1, &clipy1, &clipx2, &clipy2);
>> +		if (clipy2 > 0)
>> +			clipy2 = min (clipy2, FrameHeight + FrameY);
>> +		else
>> +			clipy2 = FrameHeight + FrameY;
>> +		iter = pango_layout_get_iter (layout);
>> +		do {
>> +			if (iter == NULL)
>> +				break;
>> +			pango_layout_iter_get_line_yrange (iter, &y0, &y1);
>> +			//g_warning("yrange: %d  %d  clipy2: %f", y0 / PANGO_SCALE, y1 / PANGO_SCALE, clipy2);
>> +			/* StringFormatFlagsLineLimit */
>> +			if (((fmt->formatFlags & StringFormatFlagsLineLimit) && y1 / PANGO_SCALE > clipy2) || (y0 / PANGO_SCALE > clipy2)) {
>> +				PangoLayoutLine *line = pango_layout_iter_get_line_readonly (iter);
>> +				pango_layout_set_text (layout, pango_layout_get_text (layout), line->start_index);
>> +				break;
>> +			}
>> +		} while (pango_layout_iter_next_line (iter));
>> +		pango_layout_iter_free (iter);
>> +	}
>>  
>> -	box->X = rc->X;
>> -	box->Y = rc->Y;
>> -	box->Height = logical.height;
>> -	/* add an extra pixel for our AA hack + 2 more if we don't draw on the box itself */
>> -	box->Width = logical.width + (fmt->formatFlags & StringFormatFlagsNoFitBlackBox) ? 1 : 3;
>> -//g_warning ("\tbox\t[x %g, y %g, w %g, h %g]", box->X, box->Y, box->Width, box->Height);
>> +	pango_layout_get_pixel_extents (layout, &ink, &logical);
>> + //g_warning ("\tlogical\t[x %d, y %d, w %d, h %d][x %d, y %d, w %d, h %d]", logical.x, logical.y, logical.width, logical.height, ink.x, ink.y, ink.width, ink.height);
>>  
>> +	if ((fmt->formatFlags & StringFormatFlagsNoFitBlackBox) == 0) {
>> +		/* By default don't allow overhang - ink space may be larger than logical space */
>> +		if (fmt->formatFlags & StringFormatFlagsDirectionVertical) {
>> +			box->X = min (ink.y, logical.y);
>> +			box->Y = min (ink.x, logical.x);
>> +			box->Height = max (ink.width, logical.width);
>> +			box->Width = max (ink.height, logical.height);
>> +		} else {
>> +			box->X = min (ink.x, logical.x);
>> +			box->Y = min (ink.y, logical.y);
>> +			box->Height = max (ink.height, logical.height);
>> +			box->Width = max (ink.width, logical.width);
>> +		}
>> +	} else {
>> +		/* Allow overhang */
>> +		if (fmt->formatFlags & StringFormatFlagsDirectionVertical) {
>> +			box->X = logical.y;
>> +			box->Y = logical.x;
>> +			box->Height = logical.width;
>> +			box->Width = logical.height;
>> +		} else {
>> +			box->X = logical.x;
>> +			box->Y = logical.y;
>> +			box->Height = logical.height;
>> +			box->Width = logical.width;
>> +		}
>> +	}
>> + //g_warning ("\tbox\t[x %g, y %g, w %g, h %g]", box->X, box->Y, box->Width, box->Height);
>> +
>>  	/* vertical alignment*/
>> -	switch (fmt->lineAlignment) {
>> -	case StringAlignmentNear:
>> -		break;
>> -	case StringAlignmentCenter:
>> -		box->Y += (rc->Height - logical.height) / 2;
>> -		break;
>> -	case StringAlignmentFar:
>> -		box->Y += (rc->Height - logical.height);
>> -		break;
>> +	if (fmt->formatFlags & StringFormatFlagsDirectionVertical) {
>> +		switch (fmt->lineAlignment) {
>> +		case StringAlignmentNear:
>> +			break;
>> +		case StringAlignmentCenter:
>> +			box->X += (rc->Width - box->Width) / 2;
>> +			break;
>> +		case StringAlignmentFar:
>> +			box->X += (rc->Width - box->Width);
>> +			break;
>> +		}
>> +	} else {
>> +		switch (fmt->lineAlignment) {
>> +		case StringAlignmentNear:
>> +			break;
>> +		case StringAlignmentCenter:
>> +			box->Y += (rc->Height - box->Height) / 2;
>> +			break;
>> +		case StringAlignmentFar:
>> +			box->Y += (rc->Height - box->Height);
>> +			break;
>> +		}
>>  	}
>> -//g_warning ("va-box\t[x %g, y %g, w %g, h %g]", box->X, box->Y, box->Width, box->Height);
>> +// g_warning ("va-box\t[x %g, y %g, w %g, h %g]", box->X, box->Y, box->Width, box->Height);
>>  
>> -	pango_cairo_update_layout (ct, layout);
>> +	pango_cairo_update_layout (graphics->ct, layout);
>>  
>>  	return layout;
>>  }
>> @@ -297,22 +492,22 @@
>>  	PangoLayout *layout;
>>  	RectF box;
>>  
>> +	/* Setup cairo */
>> +	if (brush) {
>> +		gdip_brush_setup (graphics, brush);
>> +	} else {
>> +		cairo_set_source_rgb (graphics->ct, 0., 0., 0.);
>> +	}
>> +
>>  	cairo_save (graphics->ct);
>>  
>> -	layout = gdip_pango_setup_layout (graphics->ct, stringUnicode, length, font, rc, &box, format);
>> +	layout = gdip_pango_setup_layout (graphics, stringUnicode, length, font, rc, &box, format, NULL);
>>  	if (!layout) {
>>  		cairo_restore (graphics->ct);
>>  		return OutOfMemory;
>>  	}
>>  
>> -	/* Setup cairo */
>> -	if (brush) {
>> -		gdip_brush_setup (graphics, brush);
>> -	} else {
>> -		cairo_set_source_rgb (graphics->ct, 0., 0., 0.);
>> -	}
>> -
>> -	gdip_cairo_move_to (graphics, box.X, box.Y, FALSE, TRUE);
>> +	gdip_cairo_move_to (graphics, rc->X, rc->Y, FALSE, TRUE);
>>  	pango_cairo_show_layout (graphics->ct, layout);
>>  
>>  	g_object_unref (layout);
>> @@ -325,25 +520,96 @@
>>  	GDIPCONST GpStringFormat *format, RectF *boundingBox, int *codepointsFitted, int *linesFilled)
>>  {
>>  	PangoLayout *layout;
>> +	PangoLayoutLine *line;
>> +	PangoRectangle logical;
>> +	PangoLayoutIter *iter;
>> +	int *charsRemoved = NULL;
>>  
>>  	cairo_save (graphics->ct);
>>  
>> -	layout = gdip_pango_setup_layout (graphics->ct, stringUnicode, length, font, rc, boundingBox, format);
>> +	layout = gdip_pango_setup_layout (graphics, stringUnicode, length, font, rc, boundingBox, format, &charsRemoved);
>>  	if (!layout) {
>>  		cairo_restore (graphics->ct);
>>  		return OutOfMemory;
>>  	}
>>  		
>>  	if (codepointsFitted) {
>> -		// TODO - dummy (total) value returned
>> -		*codepointsFitted = length;
>> +		int charsFitted;
>> +		int lastIndex;
>> +		int y0;
>> +		int y1;
>> +		double min_x;
>> +		double max_x;
>> +		double max_y;
>> +		const char *layoutText;
>> +		if (boundingBox && format && (format->formatFlags & StringFormatFlagsDirectionVertical)) {
>> +			min_x = boundingBox->Y;
>> +			max_x = boundingBox->Y + boundingBox->Height;
>> +			max_y = boundingBox->X + boundingBox->Width;
>> +		} else if (boundingBox) {
>> +			min_x = boundingBox->X;
>> +			max_x = boundingBox->X + boundingBox->Width;
>> +			max_y = boundingBox->Y + boundingBox->Height;
>> +		} else if (format && (format->formatFlags & StringFormatFlagsDirectionVertical)) {
>> +			min_x = rc->Y;
>> +			max_x = rc->Y + rc->Height;
>> +			max_y = rc->X + rc->Width;
>> +		} else {
>> +			min_x = rc->X;
>> +			max_x = rc->X + rc->Width;
>> +			max_y = rc->Y + rc->Height;
>> +		}
>> +		lastIndex = 0;
>> +		iter = pango_layout_get_iter (layout);
>> +		do {
>> +			if (iter == NULL)
>> +				break;
>> +			pango_layout_iter_get_line_yrange (iter, &y0, &y1);
>> +			if (y0 / PANGO_SCALE >= max_y)
>> +				break;
>> +			if (pango_layout_iter_at_last_line (iter)) {
>> +				do {
>> +					pango_layout_iter_get_char_extents (iter, &logical);
>> +					/* check both max and min to catch right-to-left text, also width may be negative */
>> +					if ((logical.x / PANGO_SCALE > max_x || (logical.x + logical.width) / PANGO_SCALE > max_x) || (logical.x / PANGO_SCALE < min_x || (logical.x + logical.width) / PANGO_SCALE < min_x))
>> +						break;
>> +					lastIndex = pango_layout_iter_get_index (iter);
>> +				} while (pango_layout_iter_next_char (iter));
>> +				break;
>> +			} else {
>> +				line = pango_layout_iter_get_line_readonly (iter);
>> +				lastIndex = line->start_index + line->length - 1;
>> +			}
>> +		} while (pango_layout_iter_next_line (iter));
>> +		pango_layout_iter_free (iter);
>> +		layoutText = pango_layout_get_text (layout);
>> +		/* this can happen when the string ends in a newline */
>> +		if (lastIndex >= strlen (layoutText))
>> +			lastIndex = strlen (layoutText) - 1;
>> +		/* Add back in any & characters removed and the final newline characters (if any) */
>> +		charsFitted = g_utf8_strlen (layoutText, lastIndex + 1) + charsRemoved [lastIndex];
>> +		//g_warning("lastIndex: %d\t\tcharsRemoved: %d", lastIndex, charsRemoved[lastIndex]);
>> +		/* safe because of null termination */
>> +		switch (layoutText [lastIndex + 1]) {
>> +			case '\r':
>> +				charsFitted++;
>> +				if (layoutText [lastIndex + 2] == '\n')
>> +					charsFitted++;
>> +				break;
>> +			case '\n':
>> +				charsFitted++;
>> +				break;
>> +		}
>> +		*codepointsFitted = charsFitted;
>>  	}
>>  
>> +	GdipFree (charsRemoved);
>> +
>>  	if (linesFilled) {
>>  		*linesFilled = pango_layout_get_line_count (layout);
>> -//g_warning ("linesFilled %d", *linesFilled);
>> +// g_warning ("linesFilled %d", *linesFilled);
>>  	}
>> -//else g_warning ("linesFilled %d", pango_layout_get_line_count (layout));
>> +// else g_warning ("linesFilled %d", pango_layout_get_line_count (layout));
>>  
>>  	g_object_unref (layout);
>>  	cairo_restore (graphics->ct);
>> @@ -361,7 +627,7 @@
>>  
>>  	cairo_save (graphics->ct);
>>  
>> -	layout = gdip_pango_setup_layout (graphics->ct, stringUnicode, length, font, layoutRect, &boundingBox, format);
>> +	layout = gdip_pango_setup_layout (graphics, stringUnicode, length, font, layoutRect, &boundingBox, format, NULL);
>>  	if (!layout) {
>>  		cairo_restore (graphics->ct);
>>  		return OutOfMemory;
>> @@ -402,7 +668,16 @@
>>  			charRect.Y = (float)box.y / PANGO_SCALE;
>>  			charRect.Width = (float)box.width / PANGO_SCALE;
>>  			charRect.Height = (float)box.height / PANGO_SCALE;
>> -//g_warning ("[%d] [%d : %d-%d] %c [x %g y %g w %g h %g]", i, j, start, end, (char)stringUnicode[j], charRect.X, charRect.Y, charRect.Width, charRect.Height);
>> +			/* Normalize values (width/height can be negative) */
>> +			if (charRect.Width < 0) {
>> +				charRect.Width = -charRect.Width;
>> +				charRect.X -= charRect.Width;
>> +			}
>> +			if (charRect.Height < 0) {
>> +				charRect.Height = -charRect.Height;
>> +				charRect.Y -= charRect.Height;
>> +			}
>> +// g_warning ("[%d] [%d : %d-%d] %c [x %g y %g w %g h %g]", i, j, start, end, (char)stringUnicode[j], charRect.X, charRect.Y, charRect.Width, charRect.Height);
>>  			status = GdipCombineRegionRect (regions [i], &charRect, CombineModeUnion);
>>  			if (status != Ok)
>>  				break;
>> Index: src/graphics-path.c
>> ===================================================================
>> --- src/graphics-path.c	(revision 126715)
>> +++ src/graphics-path.c	(working copy)
>> @@ -1212,7 +1212,7 @@
>>  	PangoLayout* layout; 
>>  
>>  	cairo_save (cr);
>> -	layout = gdip_pango_setup_layout (cr, string, length, font, layoutRect, &box, format);
>> +	layout = gdip_pango_setup_layout (cr, string, length, font, layoutRect, &box, format, NULL);
>>  	pango_cairo_layout_path (cr, layout);
>>  	g_object_unref (layout);
>>  	cairo_restore (cr);
> 
> 


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