-
/*
- * %W% %E%
- *
- * (C) Copyright IBM Corp. 1998-2003 - All Rights Reserved
- *
+ * (C) Copyright IBM Corp. and others 1998-2015 - All Rights Reserved
*/
#include "LETypes.h"
#include "LEScripts.h"
#include "LELanguages.h"
+#include "LESwaps.h"
#include "LayoutEngine.h"
#include "ArabicLayoutEngine.h"
+#include "CanonShaping.h"
#include "HanLayoutEngine.h"
+#include "HangulLayoutEngine.h"
#include "IndicLayoutEngine.h"
+#include "KhmerLayoutEngine.h"
#include "ThaiLayoutEngine.h"
+#include "TibetanLayoutEngine.h"
#include "GXLayoutEngine.h"
+#include "GXLayoutEngine2.h"
+
#include "ScriptAndLanguageTags.h"
+#include "CharSubstitutionFilter.h"
+
+#include "LEGlyphStorage.h"
#include "OpenTypeUtilities.h"
#include "GlyphSubstitutionTables.h"
+#include "GlyphDefinitionTables.h"
#include "MorphTables.h"
#include "DefaultCharMapper.h"
+#include "KernTable.h"
+
U_NAMESPACE_BEGIN
-#define ARRAY_SIZE(array) (sizeof array / sizeof array[0])
+/* Leave this copyright notice here! It needs to go somewhere in this library. */
+static const char copyright[] = U_COPYRIGHT_STRING;
+
+/* TODO: remove these? */
+const le_int32 LayoutEngine::kTypoFlagKern = LE_Kerning_FEATURE_FLAG;
+const le_int32 LayoutEngine::kTypoFlagLiga = LE_Ligatures_FEATURE_FLAG;
const LEUnicode32 DefaultCharMapper::controlChars[] = {
0x0009, 0x000A, 0x000D,
0x206A, 0x206B, 0x206C, 0x206D, 0x206E, 0x206F
};
-const le_int32 DefaultCharMapper::controlCharsCount = ARRAY_SIZE(controlChars);
-
-const LEUnicode32 DefaultCharMapper::mirroredChars[] = {
- 0x0028, 0x0029, // ascii paired punctuation
- 0x003c, 0x003e,
- 0x005b, 0x005d,
- 0x007b, 0x007d,
- 0x2045, 0x2046, // math symbols (not complete)
- 0x207d, 0x207e,
- 0x208d, 0x208e,
- 0x2264, 0x2265,
- 0x3008, 0x3009, // chinese paired punctuation
- 0x300a, 0x300b,
- 0x300c, 0x300d,
- 0x300e, 0x300f,
- 0x3010, 0x3011,
- 0x3014, 0x3015,
- 0x3016, 0x3017,
- 0x3018, 0x3019,
- 0x301a, 0x301b
-};
-
-const le_int32 DefaultCharMapper::mirroredCharsCount = ARRAY_SIZE(mirroredChars);
+const le_int32 DefaultCharMapper::controlCharsCount = LE_ARRAY_SIZE(controlChars);
LEUnicode32 DefaultCharMapper::mapChar(LEUnicode32 ch) const
{
+ (void)copyright; // Suppress unused variable warning.
if (fFilterControls) {
le_int32 index = OpenTypeUtilities::search((le_uint32)ch, (le_uint32 *)controlChars, controlCharsCount);
}
if (fMirror) {
- le_int32 index = OpenTypeUtilities::search((le_uint32) ch, (le_uint32 *)mirroredChars, mirroredCharsCount);
+ le_int32 index = OpenTypeUtilities::search((le_uint32) ch, (le_uint32 *)DefaultCharMapper::mirroredChars, DefaultCharMapper::mirroredCharsCount);
if (mirroredChars[index] == ch) {
- le_int32 mirrorOffset = ((index & 1) == 0) ? 1 : -1;
-
- return mirroredChars[index + mirrorOffset];
+ return DefaultCharMapper::srahCderorrim[index];
}
}
return ch;
}
-const char LayoutEngine::fgClassID=0;
+// This is here to get it out of LEGlyphFilter.h.
+// No particular reason to put it here, other than
+// this is a good central location...
+LEGlyphFilter::~LEGlyphFilter()
+{
+ // nothing to do
+}
-LayoutEngine::LayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode)
- : fGlyphCount(0), fGlyphs(NULL), fCharIndices(NULL), fPositions(NULL),
- fFontInstance(fontInstance), fScriptCode(scriptCode), fLanguageCode(languageCode)
+CharSubstitutionFilter::CharSubstitutionFilter(const LEFontInstance *fontInstance)
+ : fFontInstance(fontInstance)
{
- // nothing else to do?
+ // nothing to do
}
-void LayoutEngine::getCharIndices(le_int32 charIndices[], le_int32 indexBase, LEErrorCode &success) const
+CharSubstitutionFilter::~CharSubstitutionFilter()
{
- le_int32 i;
+ // nothing to do
+}
- if LE_FAILURE(success) {
- return;
- }
+class CanonMarkFilter : public UMemory, public LEGlyphFilter
+{
+private:
+ const LEReferenceTo<GlyphClassDefinitionTable> classDefTable;
- if (charIndices == NULL) {
- success = LE_ILLEGAL_ARGUMENT_ERROR;
- return;
- }
+ CanonMarkFilter(const CanonMarkFilter &other); // forbid copying of this class
+ CanonMarkFilter &operator=(const CanonMarkFilter &other); // forbid copying of this class
- if (fCharIndices == NULL) {
- success = LE_NO_LAYOUT_ERROR;
- return;
- }
+public:
+ CanonMarkFilter(const LEReferenceTo<GlyphDefinitionTableHeader> &gdefTable, LEErrorCode &success);
+ virtual ~CanonMarkFilter();
- for (i = 0; i < fGlyphCount; i += 1) {
- charIndices[i] = fCharIndices[i] + indexBase;
- }
+ virtual le_bool accept(LEGlyphID glyph) const;
+};
+
+CanonMarkFilter::CanonMarkFilter(const LEReferenceTo<GlyphDefinitionTableHeader> &gdefTable, LEErrorCode &success)
+ : classDefTable(gdefTable->getMarkAttachClassDefinitionTable(gdefTable, success))
+{
}
-void LayoutEngine::getCharIndices(le_int32 charIndices[], LEErrorCode &success) const
+CanonMarkFilter::~CanonMarkFilter()
{
- if LE_FAILURE(success) {
- return;
- }
-
- if (charIndices == NULL) {
- success = LE_ILLEGAL_ARGUMENT_ERROR;
- return;
- }
-
- if (fCharIndices == NULL) {
- success = LE_NO_LAYOUT_ERROR;
- return;
- }
-
- LE_ARRAY_COPY(charIndices, fCharIndices, fGlyphCount);
+ // nothing to do?
}
-// Copy the glyphs into caller's (32-bit) glyph array, OR in extraBits
-void LayoutEngine::getGlyphs(le_uint32 glyphs[], le_uint32 extraBits, LEErrorCode &success) const
+le_bool CanonMarkFilter::accept(LEGlyphID glyph) const
{
- le_int32 i;
+ LEErrorCode success = LE_NO_ERROR;
+ le_int32 glyphClass = classDefTable->getGlyphClass(classDefTable, glyph, success);
+ if(LE_FAILURE(success)) return false;
+ return glyphClass != 0;
+}
+
+UOBJECT_DEFINE_RTTI_IMPLEMENTATION(LayoutEngine)
+
+#define ccmpFeatureTag LE_CCMP_FEATURE_TAG
+
+#define ccmpFeatureMask 0x80000000UL
+#define canonFeatures (ccmpFeatureMask)
+
+static const FeatureMap canonFeatureMap[] =
+{
+ {ccmpFeatureTag, ccmpFeatureMask}
+};
+
+static const le_int32 canonFeatureMapCount = LE_ARRAY_SIZE(canonFeatureMap);
+
+LayoutEngine::LayoutEngine(const LEFontInstance *fontInstance,
+ le_int32 scriptCode,
+ le_int32 languageCode,
+ le_int32 typoFlags,
+ LEErrorCode &success)
+ : fGlyphStorage(NULL), fFontInstance(fontInstance), fScriptCode(scriptCode), fLanguageCode(languageCode),
+ fTypoFlags(typoFlags), fFilterZeroWidth(TRUE)
+{
if (LE_FAILURE(success)) {
return;
}
- if (glyphs == NULL) {
- success = LE_ILLEGAL_ARGUMENT_ERROR;
- return;
+ fGlyphStorage = new LEGlyphStorage();
+ if (fGlyphStorage == NULL) {
+ success = LE_MEMORY_ALLOCATION_ERROR;
}
+}
- if (fGlyphs == NULL) {
- success = LE_NO_LAYOUT_ERROR;
- return;
- }
+le_int32 LayoutEngine::getGlyphCount() const
+{
+ return fGlyphStorage->getGlyphCount();
+}
- for (i = 0; i < fGlyphCount; i += 1) {
- glyphs[i] = fGlyphs[i] | extraBits;
- }
+void LayoutEngine::getCharIndices(le_int32 charIndices[], le_int32 indexBase, LEErrorCode &success) const
+{
+ fGlyphStorage->getCharIndices(charIndices, indexBase, success);
+}
+
+void LayoutEngine::getCharIndices(le_int32 charIndices[], LEErrorCode &success) const
+{
+ fGlyphStorage->getCharIndices(charIndices, success);
+}
+
+// Copy the glyphs into caller's (32-bit) glyph array, OR in extraBits
+void LayoutEngine::getGlyphs(le_uint32 glyphs[], le_uint32 extraBits, LEErrorCode &success) const
+{
+ fGlyphStorage->getGlyphs(glyphs, extraBits, success);
}
void LayoutEngine::getGlyphs(LEGlyphID glyphs[], LEErrorCode &success) const
{
- if (LE_FAILURE(success)) {
- return;
- }
-
- if (glyphs == NULL) {
- success = LE_ILLEGAL_ARGUMENT_ERROR;
- return;
- }
-
- if (fGlyphs == NULL) {
- success = LE_NO_LAYOUT_ERROR;
- }
-
- LE_ARRAY_COPY(glyphs, fGlyphs, fGlyphCount);
+ fGlyphStorage->getGlyphs(glyphs, success);
}
void LayoutEngine::getGlyphPositions(float positions[], LEErrorCode &success) const
{
- if LE_FAILURE(success) {
- return;
- }
-
- if (positions == NULL) {
- success = LE_ILLEGAL_ARGUMENT_ERROR;
- return;
- }
-
- if (fPositions == NULL) {
- success = LE_NO_LAYOUT_ERROR;
- return;
- }
-
- LE_ARRAY_COPY(positions, fPositions, fGlyphCount * 2 + 2);
+ fGlyphStorage->getGlyphPositions(positions, success);
}
void LayoutEngine::getGlyphPosition(le_int32 glyphIndex, float &x, float &y, LEErrorCode &success) const
+{
+ fGlyphStorage->getGlyphPosition(glyphIndex, x, y, success);
+}
+
+le_int32 LayoutEngine::characterProcessing(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft,
+ LEUnicode *&outChars, LEGlyphStorage &glyphStorage, LEErrorCode &success)
{
if (LE_FAILURE(success)) {
- return;
+ return 0;
}
-
- if (glyphIndex > fGlyphCount) {
- success = LE_INDEX_OUT_OF_BOUNDS_ERROR;
- return;
+
+ if (offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) {
+ success = LE_ILLEGAL_ARGUMENT_ERROR;
+ return 0;
}
-
- if (fPositions == NULL) {
- success = LE_NO_LAYOUT_ERROR;
- return;
+
+ LEReferenceTo<GlyphSubstitutionTableHeader> canonGSUBTable((GlyphSubstitutionTableHeader *) CanonShaping::glyphSubstitutionTable);
+ LETag scriptTag = OpenTypeLayoutEngine::getScriptTag(fScriptCode);
+ LETag langSysTag = OpenTypeLayoutEngine::getLangSysTag(fLanguageCode);
+ le_int32 i, dir = 1, out = 0, outCharCount = count;
+
+ if (canonGSUBTable->coversScript(canonGSUBTable,scriptTag, success) || LE_SUCCESS(success)) {
+ CharSubstitutionFilter *substitutionFilter = new CharSubstitutionFilter(fFontInstance);
+ if (substitutionFilter == NULL) {
+ success = LE_MEMORY_ALLOCATION_ERROR;
+ return 0;
+ }
+
+ const LEUnicode *inChars = &chars[offset];
+ LEUnicode *reordered = NULL;
+ LEGlyphStorage fakeGlyphStorage;
+
+ fakeGlyphStorage.allocateGlyphArray(count, rightToLeft, success);
+
+ if (LE_FAILURE(success)) {
+ delete substitutionFilter;
+ return 0;
+ }
+
+ // This is the cheapest way to get mark reordering only for Hebrew.
+ // We could just do the mark reordering for all scripts, but most
+ // of them probably don't need it...
+ if (fScriptCode == hebrScriptCode) {
+ reordered = LE_NEW_ARRAY(LEUnicode, count);
+
+ if (reordered == NULL) {
+ delete substitutionFilter;
+ success = LE_MEMORY_ALLOCATION_ERROR;
+ return 0;
+ }
+
+ CanonShaping::reorderMarks(&chars[offset], count, rightToLeft, reordered, fakeGlyphStorage);
+ inChars = reordered;
+ }
+
+ fakeGlyphStorage.allocateAuxData(success);
+
+ if (LE_FAILURE(success)) {
+ delete substitutionFilter;
+ return 0;
+ }
+
+ if (rightToLeft) {
+ out = count - 1;
+ dir = -1;
+ }
+
+ for (i = 0; i < count; i += 1, out += dir) {
+ fakeGlyphStorage[out] = (LEGlyphID) inChars[i];
+ fakeGlyphStorage.setAuxData(out, canonFeatures, success);
+ }
+
+ if (reordered != NULL) {
+ LE_DELETE_ARRAY(reordered);
+ }
+
+ outCharCount = canonGSUBTable->process(canonGSUBTable, fakeGlyphStorage, rightToLeft, scriptTag, langSysTag, (const GlyphDefinitionTableHeader*)NULL, substitutionFilter, canonFeatureMap, canonFeatureMapCount, FALSE, success);
+
+ if (LE_FAILURE(success)) {
+ delete substitutionFilter;
+ return 0;
+ }
+
+ out = (rightToLeft? outCharCount - 1 : 0);
+
+ /*
+ * The char indices array in fakeGlyphStorage has the correct mapping
+ * back to the original input characters. Save it in glyphStorage. The
+ * subsequent call to glyphStoratge.allocateGlyphArray will keep this
+ * array rather than allocating and initializing a new one.
+ */
+ glyphStorage.adoptCharIndicesArray(fakeGlyphStorage);
+
+ outChars = LE_NEW_ARRAY(LEUnicode, outCharCount);
+
+ if (outChars == NULL) {
+ delete substitutionFilter;
+ success = LE_MEMORY_ALLOCATION_ERROR;
+ return 0;
+ }
+
+ for (i = 0; i < outCharCount; i += 1, out += dir) {
+ outChars[out] = (LEUnicode) LE_GET_GLYPH(fakeGlyphStorage[i]);
+ }
+
+ delete substitutionFilter;
}
-
- x = fPositions[glyphIndex * 2];
- y = fPositions[glyphIndex * 2 + 1];
-}
+ return outCharCount;
+}
le_int32 LayoutEngine::computeGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft,
- LEGlyphID *&glyphs, le_int32 *&charIndices, LEErrorCode &success)
+ LEGlyphStorage &glyphStorage, LEErrorCode &success)
{
if (LE_FAILURE(success)) {
return 0;
return 0;
}
- mapCharsToGlyphs(chars, offset, count, rightToLeft, rightToLeft, glyphs, charIndices, success);
+ LEUnicode *outChars = NULL;
+ le_int32 outCharCount = characterProcessing(chars, offset, count, max, rightToLeft, outChars, glyphStorage, success);
+
+ if (outChars != NULL) {
+ mapCharsToGlyphs(outChars, 0, outCharCount, rightToLeft, rightToLeft, glyphStorage, success);
+ LE_DELETE_ARRAY(outChars); // FIXME: a subclass may have allocated this, in which case this delete might not work...
+ } else {
+ mapCharsToGlyphs(chars, offset, count, rightToLeft, rightToLeft, glyphStorage, success);
+ }
- return count;
+ return glyphStorage.getGlyphCount();
}
// Input: glyphs
// Output: positions
-void LayoutEngine::positionGlyphs(const LEGlyphID glyphs[], le_int32 glyphCount, float x, float y, float *&positions, LEErrorCode &success)
+void LayoutEngine::positionGlyphs(LEGlyphStorage &glyphStorage, float x, float y, LEErrorCode &success)
{
if (LE_FAILURE(success)) {
return;
}
- if (glyphCount < 0) {
- success = LE_ILLEGAL_ARGUMENT_ERROR;
- return;
- }
+ glyphStorage.allocatePositions(success);
- if (positions == NULL) {
- positions = LE_NEW_ARRAY(float, 2 * (glyphCount + 1));
-
- if (positions == NULL) {
- success = LE_MEMORY_ALLOCATION_ERROR;
- return;
- }
+ if (LE_FAILURE(success)) {
+ return;
}
- le_int32 i;
+ le_int32 i, glyphCount = glyphStorage.getGlyphCount();
for (i = 0; i < glyphCount; i += 1) {
LEPoint advance;
- positions[i * 2] = x;
- positions[i * 2 + 1] = y;
+ glyphStorage.setPosition(i, x, y, success);
- fFontInstance->getGlyphAdvance(glyphs[i], advance);
+ fFontInstance->getGlyphAdvance(glyphStorage[i], advance);
x += advance.fX;
y += advance.fY;
}
- positions[glyphCount * 2] = x;
- positions[glyphCount * 2 + 1] = y;
+ glyphStorage.setPosition(glyphCount, x, y, success);
}
-void LayoutEngine::adjustMarkGlyphs(const LEGlyphID glyphs[], le_int32 glyphCount, le_bool reverse, LEGlyphFilter *markFilter,
- float positions[], LEErrorCode &success)
+void LayoutEngine::adjustGlyphPositions(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse,
+ LEGlyphStorage &glyphStorage, LEErrorCode &success)
+{
+ if (LE_FAILURE(success)) {
+ return;
+ }
+
+ if (chars == NULL || offset < 0 || count < 0) {
+ success = LE_ILLEGAL_ARGUMENT_ERROR;
+ return;
+ }
+
+ LEReferenceTo<GlyphDefinitionTableHeader> gdefTable((GlyphDefinitionTableHeader *) CanonShaping::glyphDefinitionTable,
+ CanonShaping::glyphDefinitionTableLen);
+ CanonMarkFilter filter(gdefTable, success);
+
+ adjustMarkGlyphs(&chars[offset], count, reverse, glyphStorage, &filter, success);
+
+ if (fTypoFlags & LE_Kerning_FEATURE_FLAG) { /* kerning enabled */
+ LETableReference kernTable(fFontInstance, LE_KERN_TABLE_TAG, success);
+ KernTable kt(kernTable, success);
+ kt.process(glyphStorage, success);
+ }
+
+ // default is no adjustments
+ return;
+}
+
+void LayoutEngine::adjustMarkGlyphs(LEGlyphStorage &glyphStorage, LEGlyphFilter *markFilter, LEErrorCode &success)
{
float xAdjust = 0;
- le_int32 g = 0, direction = 1;
- le_int32 p;
+ le_int32 p, glyphCount = glyphStorage.getGlyphCount();
if (LE_FAILURE(success)) {
return;
}
- if (positions == NULL || markFilter == NULL) {
+ if (markFilter == NULL) {
success = LE_ILLEGAL_ARGUMENT_ERROR;
return;
}
- if (reverse) {
- g = glyphCount - 1;
- direction = -1;
- }
+ float ignore, prev;
+
+ glyphStorage.getGlyphPosition(0, prev, ignore, success);
+
+ for (p = 0; p < glyphCount; p += 1) {
+ float next, xAdvance;
- for (p = 0; p < glyphCount; p += 1, g += direction) {
- float xAdvance = positions[(p + 1) * 2] - positions[p * 2];
+ glyphStorage.getGlyphPosition(p + 1, next, ignore, success);
- positions[p * 2] += xAdjust;
+ xAdvance = next - prev;
+ glyphStorage.adjustPosition(p, xAdjust, 0, success);
- if (markFilter->accept(glyphs[g])) {
+ if (markFilter->accept(glyphStorage[p])) {
xAdjust -= xAdvance;
}
+
+ prev = next;
}
- positions[glyphCount * 2] += xAdjust;
+ glyphStorage.adjustPosition(glyphCount, xAdjust, 0, success);
}
-const void *LayoutEngine::getFontTable(LETag tableTag) const
+void LayoutEngine::adjustMarkGlyphs(const LEUnicode chars[], le_int32 charCount, le_bool reverse, LEGlyphStorage &glyphStorage, LEGlyphFilter *markFilter, LEErrorCode &success)
{
- return fFontInstance->getFontTable(tableTag);
-}
+ float xAdjust = 0;
+ le_int32 c = 0, direction = 1, p;
+ le_int32 glyphCount = glyphStorage.getGlyphCount();
-void LayoutEngine::mapCharsToGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse, le_bool mirror,
- LEGlyphID *&glyphs, le_int32 *&charIndices, LEErrorCode &success)
-{
if (LE_FAILURE(success)) {
return;
}
- if (chars == NULL || offset < 0 || count < 0) {
+ if (markFilter == NULL) {
success = LE_ILLEGAL_ARGUMENT_ERROR;
return;
}
- if (glyphs == NULL) {
- glyphs = LE_NEW_ARRAY(LEGlyphID, count);
-
- if (glyphs == NULL) {
- success = LE_MEMORY_ALLOCATION_ERROR;
- return;
- }
+ if (reverse) {
+ c = glyphCount - 1;
+ direction = -1;
}
- if (charIndices == NULL) {
- le_int32 i, dir = 1, out = 0;
+ float ignore, prev;
- if (reverse) {
- out = count - 1;
- dir = -1;
- }
+ glyphStorage.getGlyphPosition(0, prev, ignore, success);
- charIndices = LE_NEW_ARRAY(le_int32, count);
+ for (p = 0; p < charCount; p += 1, c += direction) {
+ float next, xAdvance;
- if (charIndices == NULL) {
- success = LE_MEMORY_ALLOCATION_ERROR;
- return;
- }
+ glyphStorage.getGlyphPosition(p + 1, next, ignore, success);
- for (i = 0; i < count; i += 1, out += dir) {
- charIndices[out] = i;
+ xAdvance = next - prev;
+ glyphStorage.adjustPosition(p, xAdjust, 0, success);
+
+ if (markFilter->accept(chars[c])) {
+ xAdjust -= xAdvance;
}
+
+ prev = next;
}
- DefaultCharMapper charMapper(true, mirror);
+ glyphStorage.adjustPosition(glyphCount, xAdjust, 0, success);
+}
- fFontInstance->mapCharsToGlyphs(chars, offset, count, reverse, &charMapper, glyphs);
+const void *LayoutEngine::getFontTable(LETag tableTag, size_t &length) const
+{
+ return fFontInstance->getFontTable(tableTag, length);
+}
+
+void LayoutEngine::mapCharsToGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse, le_bool mirror,
+ LEGlyphStorage &glyphStorage, LEErrorCode &success)
+{
+ if (LE_FAILURE(success)) {
+ return;
+ }
+
+ glyphStorage.allocateGlyphArray(count, reverse, success);
+
+ DefaultCharMapper charMapper(TRUE, mirror);
+
+ fFontInstance->mapCharsToGlyphs(chars, offset, count, reverse, &charMapper, fFilterZeroWidth, glyphStorage);
}
// Input: characters, font?
return 0;
}
- fGlyphCount = computeGlyphs(chars, offset, count, max, rightToLeft, fGlyphs, fCharIndices, success);
- positionGlyphs(fGlyphs, fGlyphCount, x, y, fPositions, success);
- adjustGlyphPositions(chars, offset, count, rightToLeft, fGlyphs, fGlyphCount, fPositions, success);
+ le_int32 glyphCount;
+
+ if (fGlyphStorage->getGlyphCount() > 0) {
+ fGlyphStorage->reset();
+ }
- return fGlyphCount;
+ glyphCount = computeGlyphs(chars, offset, count, max, rightToLeft, *fGlyphStorage, success);
+ positionGlyphs(*fGlyphStorage, x, y, success);
+ adjustGlyphPositions(chars, offset, count, rightToLeft, *fGlyphStorage, success);
+
+ return glyphCount;
}
void LayoutEngine::reset()
{
- fGlyphCount = 0;
-
- if (fGlyphs != NULL) {
- LE_DELETE_ARRAY(fGlyphs);
- fGlyphs = NULL;
- }
-
- if (fCharIndices != NULL) {
- LE_DELETE_ARRAY(fCharIndices);
- fCharIndices = NULL;
- }
-
- if (fPositions != NULL) {
- LE_DELETE_ARRAY(fPositions);
- fPositions = NULL;
- }
+ if(fGlyphStorage!=NULL) {
+ fGlyphStorage->reset();
+ }
}
-
+
LayoutEngine *LayoutEngine::layoutEngineFactory(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, LEErrorCode &success)
{
- static le_uint32 gsubTableTag = LE_GSUB_TABLE_TAG;
- static le_uint32 mortTableTag = LE_MORT_TABLE_TAG;
+ //kerning and ligatures - by default
+ return LayoutEngine::layoutEngineFactory(fontInstance, scriptCode, languageCode, LE_DEFAULT_FEATURE_FLAG, success);
+}
+
+LayoutEngine *LayoutEngine::layoutEngineFactory(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, le_int32 typoFlags, LEErrorCode &success)
+{
+ static const le_uint32 gsubTableTag = LE_GSUB_TABLE_TAG;
+ static const le_uint32 mortTableTag = LE_MORT_TABLE_TAG;
+ static const le_uint32 morxTableTag = LE_MORX_TABLE_TAG;
if (LE_FAILURE(success)) {
return NULL;
}
- const GlyphSubstitutionTableHeader *gsubTable = (const GlyphSubstitutionTableHeader *) fontInstance->getFontTable(gsubTableTag);
+ LEReferenceTo<GlyphSubstitutionTableHeader> gsubTable(fontInstance,gsubTableTag,success);
LayoutEngine *result = NULL;
LETag scriptTag = 0x00000000;
LETag languageTag = 0x00000000;
+ LETag v2ScriptTag = OpenTypeLayoutEngine::getV2ScriptTag(scriptCode);
- if (gsubTable != NULL && gsubTable->coversScript(scriptTag = OpenTypeLayoutEngine::getScriptTag(scriptCode))) {
+ // Right now, only invoke V2 processing for Devanagari. TODO: Allow more V2 scripts as they are
+ // properly tested.
+
+ if ( v2ScriptTag == dev2ScriptTag && gsubTable.isValid() && gsubTable->coversScript(gsubTable, v2ScriptTag, success )) {
+ result = new IndicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, TRUE, gsubTable, success);
+ }
+ else if (gsubTable.isValid() && gsubTable->coversScript(gsubTable, scriptTag = OpenTypeLayoutEngine::getScriptTag(scriptCode), success)) {
switch (scriptCode) {
case bengScriptCode:
case devaScriptCode:
case guruScriptCode:
case tamlScriptCode:
case teluScriptCode:
- result = new IndicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, gsubTable);
+ case sinhScriptCode:
+ result = new IndicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, FALSE, gsubTable, success);
break;
case arabScriptCode:
- result = new ArabicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, gsubTable);
+ result = new ArabicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success);
+ break;
+
+ case hebrScriptCode:
+ // Disable hebrew ligatures since they have only archaic uses, see ticket #8318
+ result = new OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags & ~kTypoFlagLiga, gsubTable, success);
+ break;
+
+ case hangScriptCode:
+ result = new HangulOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success);
break;
case haniScriptCode:
case janLanguageCode:
case zhtLanguageCode:
case zhsLanguageCode:
- if (gsubTable->coversScriptAndLanguage(scriptTag, languageTag)) {
- result = new HanOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, gsubTable);
+ if (gsubTable->coversScriptAndLanguage(gsubTable, scriptTag, languageTag, success, TRUE)) {
+ result = new HanOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success);
break;
- }
+ }
// note: falling through to default case.
default:
- result = new OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, gsubTable);
+ result = new OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success);
break;
}
break;
+ case tibtScriptCode:
+ result = new TibetanOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success);
+ break;
+
+ case khmrScriptCode:
+ result = new KhmerOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success);
+ break;
+
default:
- result = new OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, gsubTable);
+ result = new OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success);
break;
}
} else {
- const MorphTableHeader *morphTable = (MorphTableHeader *) fontInstance->getFontTable(mortTableTag);
-
- if (morphTable != NULL) {
- result = new GXLayoutEngine(fontInstance, scriptCode, languageCode, morphTable);
+ LEReferenceTo<MorphTableHeader2> morxTable(fontInstance, morxTableTag, success);
+ if (LE_SUCCESS(success) && morxTable.isValid() && SWAPL(morxTable->version)==0x00020000) {
+ result = new GXLayoutEngine2(fontInstance, scriptCode, languageCode, morxTable, typoFlags, success);
} else {
- switch (scriptCode) {
- case bengScriptCode:
- case devaScriptCode:
- case gujrScriptCode:
- case kndaScriptCode:
- case mlymScriptCode:
- case oryaScriptCode:
- case guruScriptCode:
- case tamlScriptCode:
- case teluScriptCode:
- {
- result = new IndicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode);
- break;
- }
-
- case arabScriptCode:
- case hebrScriptCode:
- result = new UnicodeArabicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode);
- break;
-
- //case hebrScriptCode:
- // return new HebrewOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode);
-
- case thaiScriptCode:
- result = new ThaiLayoutEngine(fontInstance, scriptCode, languageCode);
- break;
-
- default:
- result = new LayoutEngine(fontInstance, scriptCode, languageCode);
- break;
+ LEReferenceTo<MorphTableHeader> mortTable(fontInstance, mortTableTag, success);
+ if (LE_SUCCESS(success) && mortTable.isValid() && SWAPL(mortTable->version)==0x00010000) { // mort
+ result = new GXLayoutEngine(fontInstance, scriptCode, languageCode, mortTable, success);
+ } else {
+ switch (scriptCode) {
+ case bengScriptCode:
+ case devaScriptCode:
+ case gujrScriptCode:
+ case kndaScriptCode:
+ case mlymScriptCode:
+ case oryaScriptCode:
+ case guruScriptCode:
+ case tamlScriptCode:
+ case teluScriptCode:
+ case sinhScriptCode:
+ {
+ result = new IndicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success);
+ break;
+ }
+
+ case arabScriptCode:
+ //case hebrScriptCode:
+ result = new UnicodeArabicOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success);
+ break;
+
+ //case hebrScriptCode:
+ // return new HebrewOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags);
+
+ case thaiScriptCode:
+ result = new ThaiLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success);
+ break;
+
+ case hangScriptCode:
+ result = new HangulOpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success);
+ break;
+
+ default:
+ result = new LayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success);
+ break;
+ }
}
}
}
+ if (result && LE_FAILURE(success)) {
+ delete result;
+ result = NULL;
+ }
+
if (result == NULL) {
success = LE_MEMORY_ALLOCATION_ERROR;
}
}
LayoutEngine::~LayoutEngine() {
- reset();
+ delete fGlyphStorage;
}
U_NAMESPACE_END