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/* -*- 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);
}
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