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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /gfx/thebes/gfxGlyphExtents.cpp
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'gfx/thebes/gfxGlyphExtents.cpp')
-rw-r--r--gfx/thebes/gfxGlyphExtents.cpp150
1 files changed, 150 insertions, 0 deletions
diff --git a/gfx/thebes/gfxGlyphExtents.cpp b/gfx/thebes/gfxGlyphExtents.cpp
new file mode 100644
index 0000000000..9c0792481d
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+++ b/gfx/thebes/gfxGlyphExtents.cpp
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+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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::GetTightGlyphExtentsAppUnitsLocked(
+ 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;
+ }
+
+#ifdef DEBUG_TEXT_RUN_STORAGE_METRICS
+ ++gGlyphExtentsSetupLazyTight;
+#endif
+ // We need to temporarily release the read lock, as SetupGlyphExtents will
+ // take a write lock internally when it wants to set the new entry.
+ MOZ_PUSH_IGNORE_THREAD_SAFETY
+ mLock.ReadUnlock();
+ aFont->SetupGlyphExtents(aDrawTarget, aGlyphID, true, this);
+ mLock.ReadLock();
+ MOZ_POP_THREAD_SAFETY
+
+ 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) {
+ AutoWriteLock lock(mLock);
+ 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 {
+ AutoReadLock lock(mLock);
+ return mContainedGlyphWidths.SizeOfExcludingThis(aMallocSizeOf) +
+ mTightGlyphExtents.ShallowSizeOfExcludingThis(aMallocSizeOf);
+}
+
+size_t gfxGlyphExtents::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const {
+ return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
+}