+++ /dev/null
-/*
- * Copyright (C) 2009 Martin Hosken
- * Copyright (C) 2009 SIL International
- *
- * This is part of HarfBuzz, a text shaping library.
- *
- * Permission is hereby granted, without written agreement and without
- * license or royalty fees, to use, copy, modify, and distribute this
- * software and its documentation for any purpose, provided that the
- * above copyright notice and the following two paragraphs appear in
- * all copies of this software.
- *
- * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
- * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
- * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
- * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
- * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
- * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
- * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
- */
-
-#include <graphite/GrClient.h>
-#include <graphite/ITextSource.h>
-#include <graphite/GrData.h>
-#include <graphite/GrConstants.h>
-#include <graphite/Segment.h>
-#include "hb-buffer-private.hh"
-#include "hb-font-private.h"
-#include "hb-graphite.h"
-#include <map>
-
-HB_BEGIN_DECLS
-
-
-namespace TtfUtil
-{
-extern int FontAscent(const void *pOS2);
-extern int FontDescent(const void *pOS2);
-extern int DesignUnits(const void *pHead);
-extern bool FontOs2Style(const void *pOS2, bool &fBold, bool &fItalic);
-}
-
-typedef struct _featureSetting {
- unsigned int id;
- int value;
-} featureSetting;
-
-class HbGrBufferTextSrc : public gr::ITextSource
-{
-public:
- HbGrBufferTextSrc(hb_buffer_t *buff, hb_feature_t *feats, unsigned int num_features)
- {
- hb_feature_t *aFeat = feats;
- featureSetting *aNewFeat;
-
- buffer = hb_buffer_reference(buff);
- features = new featureSetting[num_features];
- nFeatures = num_features;
- aNewFeat = features;
- for (unsigned int i = 0; i < num_features; i++, aFeat++, aNewFeat++)
- {
- aNewFeat->id = aFeat->tag;
- aNewFeat->value = aFeat->value;
- }
- };
- ~HbGrBufferTextSrc() { hb_buffer_destroy(buffer); delete[] features; };
- virtual gr::UtfType utfEncodingForm() { return gr::kutf32; };
- virtual size_t getLength() { return buffer->len; };
- virtual size_t fetch(gr::toffset ichMin, size_t cch, gr::utf32 * prgchBuffer)
- {
- assert(cch <= buffer->len);
- if (cch > buffer->len)
- return 0;
- for (unsigned int i = ichMin; i < ichMin + cch; i++)
- prgchBuffer[i - ichMin] = buffer->info[i].codepoint;
- return (cch - ichMin);
- };
- virtual size_t fetch(gr::toffset ichMin, size_t cch, gr::utf16 * prgchBuffer) { return 0 ;};
- virtual size_t fetch(gr::toffset ichMin, size_t cch, gr::utf8 * prgchBuffer) { return 0; };
- virtual bool getRightToLeft(gr::toffset ich)
- { return hb_buffer_get_direction(buffer) == HB_DIRECTION_RTL; };
- virtual unsigned int getDirectionDepth(gr::toffset ich)
- { return hb_buffer_get_direction(buffer) == HB_DIRECTION_RTL ? 1 : 0; };
- virtual float getVerticalOffset(gr::toffset ich) { return 0; };
- virtual gr::isocode getLanguage(gr::toffset ich)
- {
- gr::isocode aLang;
- char *p = (char *)(buffer->language);
- int i;
- for (i = 0; i < 4; i++)
- {
- if (p != NULL)
- aLang.rgch[i] = *p;
- else
- aLang.rgch[i] = 0;
- if (p && *p)
- p++;
- }
- return aLang;
- }
-
- virtual std::pair<gr::toffset, gr::toffset> propertyRange(gr::toffset ich)
- { return std::pair<gr::toffset, gr::toffset>(0, buffer->len); };
- virtual size_t getFontFeatures(gr::toffset ich, gr::FeatureSetting * prgfset)
- {
- featureSetting *aFeat = features;
- for (unsigned int i = 0; i < nFeatures; i++, aFeat++, prgfset++)
- {
- prgfset->id = aFeat->id;
- prgfset->value = aFeat->value;
- }
- return nFeatures;
- }
- virtual bool sameSegment(gr::toffset ich1, gr::toffset ich2) {return true; };
-
-private:
- hb_buffer_t *buffer;
- featureSetting *features;
- unsigned int nFeatures;
-};
-
-class HbGrFont : public gr::Font
-{
-public:
- HbGrFont(hb_font_t *font, hb_face_t *face) : gr::Font()
- { m_font = hb_font_reference(font); m_face = hb_face_reference(face); initfont(); };
- ~HbGrFont()
- {
- std::map<hb_tag_t,hb_blob_t *>::iterator p = m_blobs.begin();
- while (p != m_blobs.end())
- { hb_blob_destroy((p++)->second); }
- hb_font_destroy(m_font);
- hb_face_destroy(m_face);
- };
- HbGrFont (const HbGrFont &font) : gr::Font(font)
- {
- *this = font;
- m_blobs = std::map<hb_tag_t, hb_blob_t *>(font.m_blobs);
- std::map<hb_tag_t,hb_blob_t *>::iterator p=m_blobs.begin();
- while (p != m_blobs.end()) { hb_blob_reference((*p++).second); }
- hb_font_reference(m_font);
- hb_face_reference(m_face);
- };
- virtual HbGrFont *copyThis() { return new HbGrFont(*this); };
- virtual bool bold() { return m_bold; };
- virtual bool italic() { return m_italic; };
- virtual float ascent() { float asc; getFontMetrics(&asc, NULL, NULL); return asc; };
- virtual float descent() { float desc; getFontMetrics(NULL, &desc, NULL); return desc; };
- virtual float height()
- { float asc, desc; getFontMetrics(&asc, &desc, NULL); return (asc + desc); };
- virtual unsigned int getDPIx() { return m_font->x_ppem; };
- virtual unsigned int getDPIy() { return m_font->y_ppem; };
- virtual const void *getTable(gr::fontTableId32 tableID, size_t *pcbsize)
- {
- hb_blob_t *blob;
- std::map<hb_tag_t,hb_blob_t *>::iterator p=m_blobs.find((hb_tag_t)tableID);
- if (p == m_blobs.end())
- {
- blob = hb_face_get_table(m_face, (hb_tag_t)tableID);
- m_blobs[(hb_tag_t)tableID] = blob;
- }
- else
- { blob = p->second; }
-
- const char *res = hb_blob_lock(blob);
- if (pcbsize)
- *pcbsize = hb_blob_get_length(blob);
- hb_blob_unlock(blob);
- return (const void *)res;
- }
-
- virtual void getFontMetrics(float *pAscent, float *pDescent, float *pEmSquare)
- {
- if (pAscent) *pAscent = 1. * m_ascent * m_font->y_ppem / m_emsquare;
- if (pDescent) *pDescent = 1. * m_descent * m_font->y_ppem / m_emsquare;
- if (pEmSquare) *pEmSquare = m_font->x_scale;
- }
- virtual void getGlyphPoint(gr::gid16 glyphID, unsigned int pointNum, gr::Point &pointReturn)
- {
- hb_position_t x, y;
- hb_font_get_contour_point(m_font, m_face, pointNum, glyphID, &x, &y);
- pointReturn.x = (float)x;
- pointReturn.y = (float)y;
- }
-
- virtual void getGlyphMetrics(gr::gid16 glyphID, gr::Rect &boundingBox, gr::Point &advances)
- {
- hb_glyph_metrics_t metrics;
- hb_font_get_glyph_metrics(m_font, m_face, glyphID, &metrics);
- boundingBox.top = (metrics.y_offset + metrics.height);
- boundingBox.bottom = metrics.y_offset;
- boundingBox.left = metrics.x_offset;
- boundingBox.right = (metrics.x_offset + metrics.width);
- advances.x = metrics.x_advance;
- advances.y = metrics.y_advance;
-// fprintf (stderr, "%d: (%d, %d, %d, %d)+(%d, %d)\n", glyphID, metrics.x_offset, metrics.y_offset, metrics.width, metrics.height, metrics.x_advance, metrics.y_advance);
- }
-
-private:
- HB_INTERNAL void initfont();
-
- hb_font_t *m_font;
- hb_face_t *m_face;
- float m_ascent;
- float m_descent;
- float m_emsquare;
- bool m_bold;
- bool m_italic;
- std::map<hb_tag_t, hb_blob_t *> m_blobs;
-};
-
-void HbGrFont::initfont()
-{
- const void *pOS2 = getTable(gr::kttiOs2, NULL);
- const void *pHead = getTable(gr::kttiHead, NULL);
- TtfUtil::FontOs2Style(pOS2, m_bold, m_italic);
- m_ascent = static_cast<float>(TtfUtil::FontAscent(pOS2));
- m_descent = static_cast<float>(TtfUtil::FontDescent(pOS2));
- m_emsquare = static_cast<float>(TtfUtil::DesignUnits(pHead));
-}
-
-void
-hb_graphite_shape (hb_font_t *font,
- hb_face_t *face,
- hb_buffer_t *buffer,
- hb_feature_t *features,
- unsigned int num_features)
-{
- /* create text source */
- HbGrBufferTextSrc textSrc(buffer, features, num_features);
-
- /* create grfont */
- HbGrFont grfont(font, face);
-
- /* create segment */
- int *firsts;
- bool *flags;
- int numChars;
- int numGlyphs;
- gr::LayoutEnvironment layout;
- std::pair<gr::GlyphIterator, gr::GlyphIterator>glyph_range;
- gr::GlyphIterator iGlyph;
- hb_codepoint_t *glyph_infos, *pGlyph;
- hb_glyph_position_t *pPosition;
- int cGlyph = 0;
- int cChar = 0;
-
- layout.setStartOfLine(0);
- layout.setEndOfLine(0);
- layout.setDumbFallback(true);
- layout.setJustifier(NULL);
- layout.setRightToLeft(false);
-
- gr::RangeSegment pSegment(&grfont, &textSrc, &layout, (gr::toffset)0,
- static_cast<gr::toffset>(buffer->len), (gr::Segment *)NULL);
-
- /* fill in buffer from segment */
- _hb_buffer_clear_output(buffer);
- pSegment.getUniscribeClusters(NULL, 0, &numChars, NULL, 0, &numGlyphs);
- firsts = new int[numChars];
- flags = new bool[numGlyphs];
- glyph_infos = new hb_codepoint_t[numGlyphs];
- hb_buffer_ensure(buffer, numGlyphs);
- pSegment.getUniscribeClusters(firsts, numChars, NULL, flags, numGlyphs, NULL);
- glyph_range = pSegment.glyphs();
- for (pGlyph = glyph_infos, iGlyph = glyph_range.first; iGlyph != glyph_range.second;
- iGlyph++, pGlyph++)
- { *pGlyph = iGlyph->glyphID(); }
-
- while (cGlyph < numGlyphs)
- {
- if (flags[cGlyph])
- {
- int oldcChar = cChar++;
- int oldcGlyph = cGlyph++;
- while (cChar < numChars && firsts[cChar] == firsts[oldcChar]) cChar++;
- while (cGlyph < numGlyphs && !flags[cGlyph]) cGlyph++;
- _hb_buffer_add_output_glyphs(buffer, cChar - oldcChar, cGlyph - oldcGlyph,
- glyph_infos + oldcGlyph, 0xFFFF, 0xFFFF);
- }
- else
- { cGlyph++; } /* This should never happen */
- }
-
- float curradvx = 0., curradvy = 0.;
- for (pPosition = hb_buffer_get_glyph_positions(buffer), iGlyph = glyph_range.first;
- iGlyph != glyph_range.second; pPosition++, iGlyph++)
- {
- pPosition->x_offset = iGlyph->origin() - curradvx;
- pPosition->y_offset = iGlyph->yOffset() - curradvy;
- pPosition->x_advance = pPosition->x_offset + iGlyph->advanceWidth();
- pPosition->y_advance = pPosition->y_offset + iGlyph->advanceHeight();
- if (pPosition->x_advance < 0 && iGlyph->logicalIndex() != iGlyph->attachedClusterBase()->logicalIndex())
- pPosition->x_advance = 0;
- curradvx += pPosition->x_advance;
- curradvy += pPosition->y_advance;
-// fprintf(stderr, "%d@(%f, %f)+(%f, %f)\n", iGlyph->glyphID(), iGlyph->origin(), iGlyph->yOffset(), iGlyph->advanceWidth(), iGlyph->advanceHeight());
- }
-
- delete[] glyph_infos;
- delete[] firsts;
- delete[] flags;
-}
-
-
-HB_END_DECLS
projects / platform / upstream / libHarfBuzzSharp.git / commitdiff