src/java.desktop/share/native/libfontmanager/layout/MarkToMarkPosnSubtables.cpp
changeset 47216 71c04702a3d5
parent 25859 3317bb8137f4
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.desktop/share/native/libfontmanager/layout/MarkToMarkPosnSubtables.cpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,134 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+/*
+ *
+ * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved
+ *
+ */
+
+#include "LETypes.h"
+#include "LEFontInstance.h"
+#include "OpenTypeTables.h"
+#include "AnchorTables.h"
+#include "MarkArrays.h"
+#include "GlyphPositioningTables.h"
+#include "AttachmentPosnSubtables.h"
+#include "MarkToMarkPosnSubtables.h"
+#include "GlyphIterator.h"
+#include "LESwaps.h"
+
+U_NAMESPACE_BEGIN
+
+LEGlyphID MarkToMarkPositioningSubtable::findMark2Glyph(GlyphIterator *glyphIterator) const
+{
+    if (glyphIterator->findMark2Glyph()) {
+        return glyphIterator->getCurrGlyphID();
+    }
+
+    return 0xFFFF;
+}
+
+le_int32 MarkToMarkPositioningSubtable::process(const LETableReference &base, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode &success) const
+{
+    LEGlyphID markGlyph = glyphIterator->getCurrGlyphID();
+    le_int32 markCoverage = getGlyphCoverage(base, (LEGlyphID) markGlyph, success);
+
+    if (LE_FAILURE(success)) {
+        return 0;
+    }
+
+    if (markCoverage < 0) {
+        // markGlyph isn't a covered mark glyph
+        return 0;
+    }
+
+    LEPoint markAnchor;
+    LEReferenceTo<MarkArray> markArray(base, success, SWAPW(markArrayOffset));
+    if(LE_FAILURE(success)) {
+      return 0;
+    }
+    le_int32 markClass = markArray->getMarkClass(markArray, markGlyph, markCoverage, fontInstance, markAnchor, success);
+    le_uint16 mcCount = SWAPW(classCount);
+
+    if (markClass < 0 || markClass >= mcCount) {
+        // markGlyph isn't in the mark array or its
+        // mark class is too big. The table is mal-formed!
+        return 0;
+    }
+
+    GlyphIterator mark2Iterator(*glyphIterator);
+    LEGlyphID mark2Glyph = findMark2Glyph(&mark2Iterator);
+    le_int32 mark2Coverage = getBaseCoverage(base, (LEGlyphID) mark2Glyph, success);
+    LEReferenceTo<Mark2Array>  mark2Array(base, success, (const Mark2Array *) ((char *) this + SWAPW(baseArrayOffset)));
+    if(LE_FAILURE(success)) return 0;
+    le_uint16 mark2Count = SWAPW(mark2Array->mark2RecordCount);
+
+    if (mark2Coverage < 0 || mark2Coverage >= mark2Count) {
+        // The mark2 glyph isn't covered, or the coverage
+        // index is too big. The latter means that the
+        // table is mal-formed...
+        return 0;
+    }
+
+    LEReferenceTo<Mark2Record> mark2Record(base, success, &mark2Array->mark2RecordArray[mark2Coverage * mcCount]);
+    if(LE_FAILURE(success)) return 0;
+    Offset anchorTableOffset = SWAPW(mark2Record->mark2AnchorTableOffsetArray[markClass]);
+    LEReferenceTo<AnchorTable> anchorTable(mark2Array, success, anchorTableOffset);
+    if(LE_FAILURE(success)) return 0;
+    LEPoint mark2Anchor, markAdvance, pixels;
+
+    if (anchorTableOffset == 0) {
+        // this seems to mean that the marks don't attach...
+        return 0;
+    }
+
+    anchorTable->getAnchor(anchorTable, mark2Glyph, fontInstance, mark2Anchor, success);
+
+    fontInstance->getGlyphAdvance(markGlyph, pixels);
+    fontInstance->pixelsToUnits(pixels, markAdvance);
+
+    float anchorDiffX = mark2Anchor.fX - markAnchor.fX;
+    float anchorDiffY = mark2Anchor.fY - markAnchor.fY;
+
+    _LETRACE("Offset: (%.2f, %.2f) glyph 0x%X mark2 0x%X", anchorDiffX, anchorDiffY, markGlyph, mark2Glyph);
+
+    glyphIterator->setCurrGlyphBaseOffset(mark2Iterator.getCurrStreamPosition());
+
+    if (glyphIterator->isRightToLeft()) {
+        glyphIterator->setCurrGlyphPositionAdjustment(anchorDiffX, anchorDiffY, -markAdvance.fX, -markAdvance.fY);
+    } else {
+        LEPoint mark2Advance;
+
+        fontInstance->getGlyphAdvance(mark2Glyph, pixels);
+        fontInstance->pixelsToUnits(pixels, mark2Advance);
+
+        glyphIterator->setCurrGlyphPositionAdjustment(anchorDiffX - mark2Advance.fX, anchorDiffY - mark2Advance.fY, -markAdvance.fX, -markAdvance.fY);
+    }
+
+    return 1;
+}
+
+U_NAMESPACE_END