[icu-le] Hook up to hb_face_t

src/hb-icu-le.cc

@@ -25,6 +25,7 @@
  */
 
 #define HB_SHAPER icu_le
+#define hb_icu_le_shaper_font_data_t PortableFontInstance
 #include "hb-shaper-impl-private.hh"
 
 #include "hb-icu-le/PortableFontInstance.h"
@@ -61,18 +62,26 @@ _hb_icu_le_shaper_face_data_destroy (hb_icu_le_shaper_face_data_t *data)
  * shaper font data
  */
 
-struct hb_icu_le_shaper_font_data_t {};
-
 hb_icu_le_shaper_font_data_t *
 _hb_icu_le_shaper_font_data_create (hb_font_t *font)
 {
-  return (hb_icu_le_shaper_font_data_t *) HB_SHAPER_DATA_SUCCEEDED;
+  LEErrorCode status = LE_NO_ERROR;
+  hb_icu_le_shaper_font_data_t *data = new PortableFontInstance (font->face,
+								 font->x_scale,
+								 font->y_scale,
+								 status);
+  if (status != LE_NO_ERROR) {
+    delete (data);
+    return NULL;
+  }
+
+  return data;
 }
 
 void
 _hb_icu_le_shaper_font_data_destroy (hb_icu_le_shaper_font_data_t *data)
 {
-  free (data);
+  delete (data);
 }
 
 

src/hb-icu-le/FontTableCache.cpp

@@ -16,7 +16,7 @@
 struct FontTableCacheEntry
 {
     LETag tag;
-    const void *table;
+    hb_blob_t *blob;
 };
 
 FontTableCache::FontTableCache()
@@ -30,18 +30,18 @@ FontTableCache::FontTableCache()
     }
 
     for (int i = 0; i < fTableCacheSize; i += 1) {
-        fTableCache[i].tag   = 0;
-        fTableCache[i].table = NULL;
+        fTableCache[i].tag  = 0;
+        fTableCache[i].blob = NULL;
     }
 }
 
 FontTableCache::~FontTableCache()
 {
     for (int i = fTableCacheCurr - 1; i >= 0; i -= 1) {
-        DELETE_ARRAY(fTableCache[i].table);
+        hb_blob_destroy(fTableCache[i].blob);
 
-        fTableCache[i].tag   = 0;
-        fTableCache[i].table = NULL;
+        fTableCache[i].tag  = 0;
+        fTableCache[i].blob = NULL;
     }
 
     fTableCacheCurr = 0;
@@ -49,27 +49,27 @@ FontTableCache::~FontTableCache()
     DELETE_ARRAY(fTableCache);
 }
 
-void FontTableCache::freeFontTable(const void *table) const
+void FontTableCache::freeFontTable(hb_blob_t *blob) const
 {
-    DELETE_ARRAY(table);
+    hb_blob_destroy(blob);
 }
 
 const void *FontTableCache::find(LETag tableTag) const
 {
     for (int i = 0; i < fTableCacheCurr; i += 1) {
         if (fTableCache[i].tag == tableTag) {
-            return fTableCache[i].table;
+            return hb_blob_get_data(fTableCache[i].blob, NULL);
         }
     }
 
-    const void *table = readFontTable(tableTag);
+    hb_blob_t *blob = readFontTable(tableTag);
 
-    ((FontTableCache *) this)->add(tableTag, table);
+    ((FontTableCache *) this)->add(tableTag, blob);
 
-    return table;
+    return hb_blob_get_data (blob, NULL);
 }
 
-void FontTableCache::add(LETag tableTag, const void *table)
+void FontTableCache::add(LETag tableTag, hb_blob_t *blob)
 {
     if (fTableCacheCurr >= fTableCacheSize) {
         le_int32 newSize = fTableCacheSize + TABLE_CACHE_GROW;
@@ -77,15 +77,15 @@ void FontTableCache::add(LETag tableTag, const void *table)
         fTableCache = (FontTableCacheEntry *) GROW_ARRAY(fTableCache, newSize);
 
         for (le_int32 i = fTableCacheSize; i < newSize; i += 1) {
-            fTableCache[i].tag   = 0;
-            fTableCache[i].table = NULL;
+            fTableCache[i].tag  = 0;
+            fTableCache[i].blob = NULL;
         }
 
         fTableCacheSize = newSize;
     }
 
-    fTableCache[fTableCacheCurr].tag   = tableTag;
-    fTableCache[fTableCacheCurr].table = table;
+    fTableCache[fTableCacheCurr].tag  = tableTag;
+    fTableCache[fTableCacheCurr].blob = blob;
 
     fTableCacheCurr += 1;
 }

src/hb-icu-le/FontTableCache.h

@@ -9,6 +9,9 @@
 
 #define __FONTTABLECACHE_H
 
+#define HB_H_IN
+#include <hb-blob.h>
+
 #include "layout/LETypes.h"
 
 U_NAMESPACE_USE
@@ -25,12 +28,12 @@ public:
     const void *find(LETag tableTag) const;
 
 protected:
-    virtual const void *readFontTable(LETag tableTag) const = 0;
-    virtual void freeFontTable(const void *table) const;
+    virtual hb_blob_t *readFontTable(LETag tableTag) const = 0;
+    virtual void freeFontTable(hb_blob_t *blob) const;
 
 private:
 
-    void add(LETag tableTag, const void *table);
+    void add(LETag tableTag, hb_blob_t *blob);
 
     FontTableCacheEntry *fTableCache;
     le_int32 fTableCacheCurr;

src/hb-icu-le/PortableFontInstance.cpp

@@ -64,83 +64,24 @@ le_int8 PortableFontInstance::highBit(le_int32 value)
     return bit;
 }
 
-PortableFontInstance::PortableFontInstance(const char *fileName, float pointSize, LEErrorCode &status)
-    : fFile(NULL), fPointSize(pointSize), fUnitsPerEM(0), fFontChecksum(0), fAscent(0), fDescent(0), fLeading(0),
-      fDirectory(NULL), fNAMETable(NULL), fNameCount(0), fNameStringOffset(0), fCMAPMapper(NULL), fHMTXTable(NULL), fNumGlyphs(0), fNumLongHorMetrics(0)
+PortableFontInstance::PortableFontInstance(hb_face_t *face, float xScale, float yScale, LEErrorCode &status)
+    : fFace(face), fXScale(xScale), fYScale(yScale), fUnitsPerEM(0), fAscent(0), fDescent(0), fLeading(0),
+      fNAMETable(NULL), fNameCount(0), fNameStringOffset(0), fCMAPMapper(NULL), fHMTXTable(NULL), fNumGlyphs(0), fNumLongHorMetrics(0)
 {
     if (LE_FAILURE(status)) {
         return;
     }
 
-    // open the font file
-    fFile = fopen(fileName, "rb");
-
-    if (fFile == NULL) {
-        status = LE_FONT_FILE_NOT_FOUND_ERROR;
-        return;
-    }
-
-    // read in the directory
-    SFNTDirectory tempDir;
-
-    fread(&tempDir, sizeof tempDir, 1, fFile);
-
-    le_int32 dirSize = sizeof tempDir + ((SWAPW(tempDir.numTables) - ANY_NUMBER) * sizeof(DirectoryEntry));
-    const LETag headTag = LE_HEAD_TABLE_TAG;
     const LETag hheaTag = LE_HHEA_TABLE_TAG;
-    const HEADTable *headTable = NULL;
     const HHEATable *hheaTable = NULL;
-//  const NAMETable *nameTable = NULL;
-    le_uint16 numTables = 0;
 
-    fDirectory = (const SFNTDirectory *) NEW_ARRAY(char, dirSize);
-
-    if (fDirectory == NULL) {
-        status = LE_MEMORY_ALLOCATION_ERROR;
-        goto error_exit;
-    }
-
-    fseek(fFile, 0L, SEEK_SET);
-    fread((void *) fDirectory, sizeof(char), dirSize, fFile);
-
-    //
-    // We calculate these numbers 'cause some fonts
-    // have bogus values for them in the directory header.
-    //
-    numTables = SWAPW(fDirectory->numTables);
-    fDirPower = 1 << highBit(numTables);
-    fDirExtra = numTables - fDirPower;
-
-    // read unitsPerEm from 'head' table
-    headTable = (const HEADTable *) getFontTable(headTag);
-
-    if (headTable == NULL) {
-        status = LE_MISSING_FONT_TABLE_ERROR;
-        goto error_exit;
-    }
-
-    fUnitsPerEM   = SWAPW(headTable->unitsPerEm);
-    fFontChecksum = SWAPL(headTable->checksumAdjustment);
-
-    //nameTable = (NAMETable *) getFontTable(nameTag);
-
-    //if (nameTable == NULL) {
-    //    status = LE_MISSING_FONT_TABLE_ERROR;
-    //    goto error_exit;
-    //}
-
-    //fFontVersionString = findName(nameTable, NAME_VERSION_STRING, PLATFORM_MACINTOSH, MACINTOSH_ROMAN, MACINTOSH_ENGLISH);
-
-    //if (fFontVersionString == NULL) {
-    //    status = LE_MISSING_FONT_TABLE_ERROR;
-    //    goto error_exit;
-    //}
+    fUnitsPerEM = hb_face_get_upem (face);
 
     hheaTable = (HHEATable *) getFontTable(hheaTag);
 
     if (hheaTable == NULL) {
         status = LE_MISSING_FONT_TABLE_ERROR;
-        goto error_exit;
+	return;
     }
 
     fAscent  = (le_int32) yUnitsToPoints((float) SWAPW(hheaTable->ascent));
@@ -153,73 +94,14 @@ PortableFontInstance::PortableFontInstance(const char *fileName, float pointSize
 
     if (fCMAPMapper == NULL) {
         status = LE_MISSING_FONT_TABLE_ERROR;
-        goto error_exit;
+	return;
     }
-
-    return;
-
-error_exit:
-    fclose(fFile);
-    fFile = NULL;
-    return;
 }
 
 PortableFontInstance::~PortableFontInstance()
 {
-    if (fFile != NULL) {
-        fclose(fFile);
-
+    if (fCMAPMapper)
         delete fCMAPMapper;
-
-        DELETE_ARRAY(fDirectory);
-    }
-}
-
-const DirectoryEntry *PortableFontInstance::findTable(LETag tag) const
-{
-    if (fDirectory != NULL) {
-        le_uint16 table = 0;
-        le_uint16 probe = fDirPower;
-
-        if (SWAPL(fDirectory->tableDirectory[fDirExtra].tag) <= tag) {
-            table = fDirExtra;
-        }
-
-        while (probe > (1 << 0)) {
-            probe >>= 1;
-
-            if (SWAPL(fDirectory->tableDirectory[table + probe].tag) <= tag) {
-                table += probe;
-            }
-        }
-
-        if (SWAPL(fDirectory->tableDirectory[table].tag) == tag) {
-            return &fDirectory->tableDirectory[table];
-        }
-    }
-
-    return NULL;
-}
-
-const void *PortableFontInstance::readTable(LETag tag, le_uint32 *length) const
-{
-    const DirectoryEntry *entry = findTable(tag);
-
-    if (entry == NULL) {
-        *length = 0;
-        return NULL;
-    }
-
-    *length = SWAPL(entry->length);
-
-    void *table = NEW_ARRAY(char, *length);
-
-    if (table != NULL) {
-        fseek(fFile, SWAPL(entry->offset), SEEK_SET);
-        fread(table, sizeof(char), *length, fFile);
-    }
-
-    return table;
 }
 
 const void *PortableFontInstance::getFontTable(LETag tableTag) const
@@ -227,11 +109,9 @@ const void *PortableFontInstance::getFontTable(LETag tableTag) const
     return FontTableCache::find(tableTag);
 }
 
-const void *PortableFontInstance::readFontTable(LETag tableTag) const
+hb_blob_t *PortableFontInstance::readFontTable(LETag tableTag) const
 {
-    le_uint32 len;
-
-    return readTable(tableTag, &len);
+  return hb_face_reference_table(fFace, tableTag);
 }
 
 CMAPMapper *PortableFontInstance::findUnicodeMapper()
@@ -369,7 +249,7 @@ le_int32 PortableFontInstance::getUnitsPerEM() const
 
 le_uint32 PortableFontInstance::getFontChecksum() const
 {
-    return fFontChecksum;
+    return 0;
 }
 
 le_int32 PortableFontInstance::getAscent() const
@@ -408,12 +288,12 @@ LEGlyphID PortableFontInstance::mapCharToGlyph(LEUnicode32 ch) const
 
 float PortableFontInstance::getXPixelsPerEm() const
 {
-    return fPointSize;
+    return fXScale;
 }
 
 float PortableFontInstance::getYPixelsPerEm() const
 {
-    return fPointSize;
+    return fYScale;
 }
 
 float PortableFontInstance::getScaleFactorX() const

src/hb-icu-le/PortableFontInstance.h

@@ -15,32 +15,29 @@
 #ifndef __PORTABLEFONTINSTANCE_H
 #define __PORTABLEFONTINSTANCE_H
 
-#include <stdio.h>
+#define HB_H_IN
+#include <hb-font.h>
+#include <hb-blob.h>
 
 #include "layout/LETypes.h"
 #include "layout/LEFontInstance.h"
 
 #include "FontTableCache.h"
 
-#include "sfnt.h"
 #include "cmaps.h"
 
 class PortableFontInstance : public LEFontInstance, protected FontTableCache
 {
 private:
-    FILE *fFile;
+    hb_face_t *fFace;
 
-    float     fPointSize;
+    float     fXScale;
+    float     fYScale;
     le_int32  fUnitsPerEM;
-    le_uint32 fFontChecksum;
     le_int32  fAscent;
     le_int32  fDescent;
     le_int32  fLeading;
 
-    const SFNTDirectory *fDirectory;
-    le_uint16 fDirPower;
-    le_uint16 fDirExtra;
-
     float fDeviceScaleX;
     float fDeviceScaleY;
 
@@ -56,17 +53,15 @@ private:
 
     static le_int8 highBit(le_int32 value);
 
-    const DirectoryEntry *findTable(LETag tag) const;
-    const void *readTable(LETag tag, le_uint32 *length) const;
     void getMetrics();
 
     CMAPMapper *findUnicodeMapper();
 
 protected:
-    const void *readFontTable(LETag tableTag) const;
+    hb_blob_t *readFontTable(LETag tableTag) const;
 
 public:
-    PortableFontInstance(const char *fileName, float pointSize, LEErrorCode &status);
+    PortableFontInstance(hb_face_t *face, float xScale, float yScale, LEErrorCode &status);
 
     virtual ~PortableFontInstance();
 

src/hb-icu-le/README

 This is PortableFontInstance from icu/test/testle of ICU50.
+Modified to use a hb_face_t.
 For license information, see the file license.html.