1 files changed, 83 insertions, 0 deletions
diff --git a/gfx/thebes/gfxFont-Impl.h b/gfx/thebes/gfxFont-Impl.h
new file mode 100644
index 000000000..2661d1f40
--- /dev/null
+++ b/gfx/thebes/gfxFont-Impl.h
@@ -0,0 +1,83 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef GFX_FONT_IMPL_H
+#define GFX_FONT_IMPL_H
+
+#include "mozilla/DebugOnly.h"
+using mozilla::DebugOnly;
+
+#ifdef __GNUC__
+#define GFX_MAYBE_UNUSED __attribute__((unused))
+#else
+#define GFX_MAYBE_UNUSED
+#endif
+
+template<typename T>
+gfxShapedWord*
+gfxFont::GetShapedWord(DrawTarget *aDrawTarget,
+                       const T    *aText,
+                       uint32_t    aLength,
+                       uint32_t    aHash,
+                       Script      aRunScript,
+                       bool        aVertical,
+                       int32_t     aAppUnitsPerDevUnit,
+                       uint32_t    aFlags,
+                       gfxTextPerfMetrics *aTextPerf GFX_MAYBE_UNUSED)
+{
+    // if the cache is getting too big, flush it and start over
+    uint32_t wordCacheMaxEntries =
+        gfxPlatform::GetPlatform()->WordCacheMaxEntries();
+    if (mWordCache->Count() > wordCacheMaxEntries) {
+        NS_WARNING("flushing shaped-word cache");
+        ClearCachedWords();
+    }
+
+    // if there's a cached entry for this word, just return it
+    CacheHashKey key(aText, aLength, aHash,
+                     aRunScript,
+                     aAppUnitsPerDevUnit,
+                     aFlags);
+
+    CacheHashEntry *entry = mWordCache->PutEntry(key);
+    if (!entry) {
+        NS_WARNING("failed to create word cache entry - expect missing text");
+        return nullptr;
+    }
+    gfxShapedWord* sw = entry->mShapedWord.get();
+
+    if (sw) {
+        sw->ResetAge();
+#ifndef RELEASE_OR_BETA
+        if (aTextPerf) {
+            aTextPerf->current.wordCacheHit++;
+        }
+#endif
+        return sw;
+    }
+
+#ifndef RELEASE_OR_BETA
+    if (aTextPerf) {
+        aTextPerf->current.wordCacheMiss++;
+    }
+#endif
+
+    sw = gfxShapedWord::Create(aText, aLength, aRunScript, aAppUnitsPerDevUnit,
+                               aFlags);
+    entry->mShapedWord.reset(sw);
+    if (!sw) {
+        NS_WARNING("failed to create gfxShapedWord - expect missing text");
+        return nullptr;
+    }
+
+    DebugOnly<bool> ok =
+        ShapeText(aDrawTarget, aText, 0, aLength, aRunScript, aVertical, sw);
+
+    NS_WARNING_ASSERTION(ok, "failed to shape word - expect garbled text");
+
+    return sw;
+}
+ 
+#endif // GFX_FONT_IMPL_H
+\ No newline at end of file