Add m-esr52 at 52.6.0

1 files changed, 154 insertions, 0 deletions

diff --git a/gfx/thebes/gfxGlyphExtents.cpp b/gfx/thebes/gfxGlyphExtents.cpp
new file mode 100644
index 000000000..cb8f5838b
--- /dev/null
+++ b/gfx/thebes/gfxGlyphExtents.cpp
@@ -0,0 +1,154 @@
+/* -*- Mode: C++; tab-width: 20; 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/. */
+
+#include "gfxGlyphExtents.h"
+#include "gfxTextRun.h"
+
+using namespace mozilla;
+
+#ifdef DEBUG_roc
+#define DEBUG_TEXT_RUN_STORAGE_METRICS
+#endif
+
+#ifdef DEBUG_TEXT_RUN_STORAGE_METRICS
+extern uint32_t gTextRunStorageHighWaterMark;
+extern uint32_t gTextRunStorage;
+extern uint32_t gFontCount;
+extern uint32_t gGlyphExtentsCount;
+extern uint32_t gGlyphExtentsWidthsTotalSize;
+extern uint32_t gGlyphExtentsSetupEagerSimple;
+extern uint32_t gGlyphExtentsSetupEagerTight;
+extern uint32_t gGlyphExtentsSetupLazyTight;
+extern uint32_t gGlyphExtentsSetupFallBackToTight;
+#endif
+
+gfxGlyphExtents::~gfxGlyphExtents()
+{
+#ifdef DEBUG_TEXT_RUN_STORAGE_METRICS
+    gGlyphExtentsWidthsTotalSize +=
+        mContainedGlyphWidths.SizeOfExcludingThis(&FontCacheMallocSizeOf);
+    gGlyphExtentsCount++;
+#endif
+    MOZ_COUNT_DTOR(gfxGlyphExtents);
+}
+
+bool
+gfxGlyphExtents::GetTightGlyphExtentsAppUnits(gfxFont* aFont,
+    DrawTarget* aDrawTarget, uint32_t aGlyphID, gfxRect* aExtents)
+{
+    HashEntry *entry = mTightGlyphExtents.GetEntry(aGlyphID);
+    if (!entry) {
+        // Some functions higher up in the call chain deliberately pass in a
+        // nullptr DrawTarget, e.g. GetBaselinePosition() passes nullptr to
+        // gfxTextRun::MeasureText() and that nullptr reaches here.
+        if (!aDrawTarget) {
+            NS_WARNING("Could not get glyph extents (no aDrawTarget)");
+            return false;
+        }
+
+        if (aFont->SetupCairoFont(aDrawTarget)) {
+#ifdef DEBUG_TEXT_RUN_STORAGE_METRICS
+            ++gGlyphExtentsSetupLazyTight;
+#endif
+            aFont->SetupGlyphExtents(aDrawTarget, aGlyphID, true, this);
+            entry = mTightGlyphExtents.GetEntry(aGlyphID);
+        }
+        if (!entry) {
+            NS_WARNING("Could not get glyph extents");
+            return false;
+        }
+    }
+
+    *aExtents = gfxRect(entry->x, entry->y, entry->width, entry->height);
+    return true;
+}
+
+gfxGlyphExtents::GlyphWidths::~GlyphWidths()
+{
+    uint32_t i, count = mBlocks.Length();
+    for (i = 0; i < count; ++i) {
+        uintptr_t bits = mBlocks[i];
+        if (bits && !(bits & 0x1)) {
+            delete[] reinterpret_cast<uint16_t *>(bits);
+        }
+    }
+}
+
+uint32_t
+gfxGlyphExtents::GlyphWidths::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
+{
+    uint32_t i;
+    uint32_t size = mBlocks.ShallowSizeOfExcludingThis(aMallocSizeOf);
+    for (i = 0; i < mBlocks.Length(); ++i) {
+        uintptr_t bits = mBlocks[i];
+        if (bits && !(bits & 0x1)) {
+            size += aMallocSizeOf(reinterpret_cast<void*>(bits));
+        }
+    }
+    return size;
+}
+
+void
+gfxGlyphExtents::GlyphWidths::Set(uint32_t aGlyphID, uint16_t aWidth)
+{
+    uint32_t block = aGlyphID >> BLOCK_SIZE_BITS;
+    uint32_t len = mBlocks.Length();
+    if (block >= len) {
+        uintptr_t *elems = mBlocks.AppendElements(block + 1 - len);
+        if (!elems)
+            return;
+        memset(elems, 0, sizeof(uintptr_t)*(block + 1 - len));
+    }
+
+    uintptr_t bits = mBlocks[block];
+    uint32_t glyphOffset = aGlyphID & (BLOCK_SIZE - 1);
+    if (!bits) {
+        mBlocks[block] = MakeSingle(glyphOffset, aWidth);
+        return;
+    }
+
+    uint16_t *newBlock;
+    if (bits & 0x1) {
+        // Expand the block to a real block. We could avoid this by checking
+        // glyphOffset == GetGlyphOffset(bits), but that never happens so don't bother
+        newBlock = new uint16_t[BLOCK_SIZE];
+        if (!newBlock)
+            return;
+        uint32_t i;
+        for (i = 0; i < BLOCK_SIZE; ++i) {
+            newBlock[i] = INVALID_WIDTH;
+        }
+        newBlock[GetGlyphOffset(bits)] = GetWidth(bits);
+        mBlocks[block] = reinterpret_cast<uintptr_t>(newBlock);
+    } else {
+        newBlock = reinterpret_cast<uint16_t *>(bits);
+    }
+    newBlock[glyphOffset] = aWidth;
+}
+
+void
+gfxGlyphExtents::SetTightGlyphExtents(uint32_t aGlyphID, const gfxRect& aExtentsAppUnits)
+{
+    HashEntry *entry = mTightGlyphExtents.PutEntry(aGlyphID);
+    if (!entry)
+        return;
+    entry->x = aExtentsAppUnits.X();
+    entry->y = aExtentsAppUnits.Y();
+    entry->width = aExtentsAppUnits.Width();
+    entry->height = aExtentsAppUnits.Height();
+}
+
+size_t
+gfxGlyphExtents::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
+{
+    return mContainedGlyphWidths.SizeOfExcludingThis(aMallocSizeOf) +
+        mTightGlyphExtents.ShallowSizeOfExcludingThis(aMallocSizeOf);
+}
+
+size_t
+gfxGlyphExtents::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
+{
+    return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
+}