[Mono-winforms-list] [Mono-dev] libgdiplus pango patch
Sebastien Pouliot
sebastien.pouliot at gmail.com
Wed Feb 18 13:24:51 EST 2009
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);
More information about the Mono-winforms-list
mailing list