1 files changed, 174 insertions, 0 deletions
diff --git a/gfx/2d/NativeFontResourceMac.cpp b/gfx/2d/NativeFontResourceMac.cpp
new file mode 100644
index 0000000000..a05310a142
--- /dev/null
+++ b/gfx/2d/NativeFontResourceMac.cpp
@@ -0,0 +1,174 @@
+/* -*- 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
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#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"
+#include "nsCocoaFeatures.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