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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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
#include <unordered_map>
#include <unordered_set>
#include "NativeFontResourceMac.h"
#include "UnscaledFontMac.h"
#include "Types.h"
#include "mozilla/RefPtr.h"
#include "mozilla/DataMutex.h"
#ifdef MOZ_WIDGET_UIKIT
# include <CoreFoundation/CoreFoundation.h>
#endif
#include "nsIMemoryReporter.h"
namespace mozilla {
namespace gfx {
#define FONT_NAME_MAX 32
static StaticDataMutex<std::unordered_map<void*, nsAutoCStringN<FONT_NAME_MAX>>>
sWeakFontDataMap("WeakFonts");
void FontDataDeallocate(void*, void* info) {
auto fontMap = sWeakFontDataMap.Lock();
fontMap->erase(info);
free(info);
}
class NativeFontResourceMacReporter final : public nsIMemoryReporter {
~NativeFontResourceMacReporter() = default;
MOZ_DEFINE_MALLOC_SIZE_OF(MallocSizeOf)
public:
NS_DECL_ISUPPORTS
NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override {
auto fontMap = sWeakFontDataMap.Lock();
nsAutoCString path("explicit/gfx/native-font-resource-mac/font(");
unsigned int unknownFontIndex = 0;
for (auto& i : *fontMap) {
nsAutoCString subPath(path);
if (aAnonymize) {
subPath.AppendPrintf("<anonymized-%p>", this);
} else {
if (i.second.Length()) {
subPath.AppendLiteral("psname=");
subPath.Append(i.second);
} else {
subPath.AppendPrintf("Unknown(%d)", unknownFontIndex);
}
}
size_t bytes = MallocSizeOf(i.first) + FONT_NAME_MAX;
subPath.Append(")");
aHandleReport->Callback(""_ns, subPath, KIND_HEAP, UNITS_BYTES, bytes,
"Memory used by this native font."_ns, aData);
unknownFontIndex++;
}
return NS_OK;
}
};
NS_IMPL_ISUPPORTS(NativeFontResourceMacReporter, nsIMemoryReporter)
void NativeFontResourceMac::RegisterMemoryReporter() {
RegisterStrongMemoryReporter(new NativeFontResourceMacReporter);
}
/* static */
already_AddRefed<NativeFontResourceMac> NativeFontResourceMac::Create(
uint8_t* aFontData, uint32_t aDataLength) {
uint8_t* fontData = (uint8_t*)malloc(aDataLength);
if (!fontData) {
return nullptr;
}
memcpy(fontData, aFontData, aDataLength);
CFAllocatorContext context = {0, fontData, nullptr, nullptr,
nullptr, nullptr, nullptr, FontDataDeallocate,
nullptr};
CFAllocatorRef allocator = CFAllocatorCreate(kCFAllocatorDefault, &context);
// We create a CFDataRef here that we'l hold until we've determined that we
// have a valid font. If and only if we can create a font from the data,
// we'll store the font data in our map. Whether or not the font is valid,
// we'll later release this CFDataRef.
CFDataRef data = CFDataCreateWithBytesNoCopy(kCFAllocatorDefault, fontData,
aDataLength, allocator);
if (!data) {
free(fontData);
return nullptr;
}
CTFontDescriptorRef ctFontDesc =
CTFontManagerCreateFontDescriptorFromData(data);
if (!ctFontDesc) {
CFRelease(data);
return nullptr;
}
// creating the CGFontRef via the CTFont avoids the data being held alive
// in a cache.
CTFontRef ctFont = CTFontCreateWithFontDescriptor(ctFontDesc, 0, NULL);
// Creating the CGFont from the CTFont prevents the font data from being
// held in the TDescriptorSource cache. This appears to be true even
// if we later create a CTFont from the CGFont.
CGFontRef fontRef = CTFontCopyGraphicsFont(ctFont, NULL);
CFRelease(ctFont);
if (!fontRef) {
// Not a valid font; release the structures we've been holding.
CFRelease(data);
CFRelease(ctFontDesc);
return nullptr;
}
// Determine the font name and store it with the font data in the map.
nsAutoCStringN<FONT_NAME_MAX> fontName;
CFStringRef psname = CGFontCopyPostScriptName(fontRef);
if (psname) {
const char* cstr = CFStringGetCStringPtr(psname, kCFStringEncodingUTF8);
if (cstr) {
fontName.Assign(cstr);
} else {
char buf[FONT_NAME_MAX];
if (CFStringGetCString(psname, buf, FONT_NAME_MAX,
kCFStringEncodingUTF8)) {
fontName.Assign(buf);
}
}
CFRelease(psname);
}
{
auto fontMap = sWeakFontDataMap.Lock();
void* key = (void*)fontData;
fontMap->insert({key, fontName});
}
// It's now safe to release our CFDataRef.
CFRelease(data);
// passes ownership of fontRef to the NativeFontResourceMac instance
RefPtr<NativeFontResourceMac> fontResource =
new NativeFontResourceMac(ctFontDesc, fontRef, aDataLength);
return fontResource.forget();
}
already_AddRefed<UnscaledFont> NativeFontResourceMac::CreateUnscaledFont(
uint32_t aIndex, const uint8_t* aInstanceData,
uint32_t aInstanceDataLength) {
RefPtr<UnscaledFont> unscaledFont =
new UnscaledFontMac(mFontDescRef, mFontRef, true);
return unscaledFont.forget();
}
} // namespace gfx
} // namespace mozilla