1 files changed, 144 insertions, 0 deletions
diff --git a/gfx/thebes/gfxDWriteCommon.h b/gfx/thebes/gfxDWriteCommon.h
new file mode 100644
index 0000000000..6d8f3afd40
--- /dev/null
+++ b/gfx/thebes/gfxDWriteCommon.h
@@ -0,0 +1,144 @@
+/* -*- 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/. */
+
+#ifndef GFX_DWRITECOMMON_H
+#define GFX_DWRITECOMMON_H
+
+// Mozilla includes
+#include "mozilla/MemoryReporting.h"
+#include "mozilla/FontPropertyTypes.h"
+#include "nscore.h"
+#include "nsCOMPtr.h"
+#include "cairo-features.h"
+#include "gfxFontConstants.h"
+#include "nsTArray.h"
+#include "gfxWindowsPlatform.h"
+
+#include <windows.h>
+#include <dwrite.h>
+
+static inline DWRITE_FONT_STRETCH DWriteFontStretchFromStretch(
+    mozilla::FontStretch aStretch) {
+  if (aStretch == mozilla::FontStretch::UltraCondensed()) {
+    return DWRITE_FONT_STRETCH_ULTRA_CONDENSED;
+  }
+  if (aStretch == mozilla::FontStretch::ExtraCondensed()) {
+    return DWRITE_FONT_STRETCH_EXTRA_CONDENSED;
+  }
+  if (aStretch == mozilla::FontStretch::Condensed()) {
+    return DWRITE_FONT_STRETCH_CONDENSED;
+  }
+  if (aStretch == mozilla::FontStretch::SemiCondensed()) {
+    return DWRITE_FONT_STRETCH_SEMI_CONDENSED;
+  }
+  if (aStretch == mozilla::FontStretch::Normal()) {
+    return DWRITE_FONT_STRETCH_NORMAL;
+  }
+  if (aStretch == mozilla::FontStretch::SemiExpanded()) {
+    return DWRITE_FONT_STRETCH_SEMI_EXPANDED;
+  }
+  if (aStretch == mozilla::FontStretch::Expanded()) {
+    return DWRITE_FONT_STRETCH_EXPANDED;
+  }
+  if (aStretch == mozilla::FontStretch::ExtraExpanded()) {
+    return DWRITE_FONT_STRETCH_EXTRA_EXPANDED;
+  }
+  if (aStretch == mozilla::FontStretch::UltraExpanded()) {
+    return DWRITE_FONT_STRETCH_ULTRA_EXPANDED;
+  }
+  return DWRITE_FONT_STRETCH_UNDEFINED;
+}
+
+static inline mozilla::FontStretch FontStretchFromDWriteStretch(
+    DWRITE_FONT_STRETCH aStretch) {
+  switch (aStretch) {
+    case DWRITE_FONT_STRETCH_ULTRA_CONDENSED:
+      return mozilla::FontStretch::UltraCondensed();
+    case DWRITE_FONT_STRETCH_EXTRA_CONDENSED:
+      return mozilla::FontStretch::ExtraCondensed();
+    case DWRITE_FONT_STRETCH_CONDENSED:
+      return mozilla::FontStretch::Condensed();
+    case DWRITE_FONT_STRETCH_SEMI_CONDENSED:
+      return mozilla::FontStretch::SemiCondensed();
+    case DWRITE_FONT_STRETCH_NORMAL:
+      return mozilla::FontStretch::Normal();
+    case DWRITE_FONT_STRETCH_SEMI_EXPANDED:
+      return mozilla::FontStretch::SemiExpanded();
+    case DWRITE_FONT_STRETCH_EXPANDED:
+      return mozilla::FontStretch::Expanded();
+    case DWRITE_FONT_STRETCH_EXTRA_EXPANDED:
+      return mozilla::FontStretch::ExtraExpanded();
+    case DWRITE_FONT_STRETCH_ULTRA_EXPANDED:
+      return mozilla::FontStretch::UltraExpanded();
+    default:
+      return mozilla::FontStretch::Normal();
+  }
+}
+
+class gfxDWriteFontFileLoader : public IDWriteFontFileLoader {
+ public:
+  gfxDWriteFontFileLoader() {}
+
+  // IUnknown interface
+  IFACEMETHOD(QueryInterface)(IID const& iid, OUT void** ppObject) {
+    if (iid == __uuidof(IDWriteFontFileLoader)) {
+      *ppObject = static_cast<IDWriteFontFileLoader*>(this);
+      return S_OK;
+    } else if (iid == __uuidof(IUnknown)) {
+      *ppObject = static_cast<IUnknown*>(this);
+      return S_OK;
+    } else {
+      return E_NOINTERFACE;
+    }
+  }
+
+  IFACEMETHOD_(ULONG, AddRef)() { return 1; }
+
+  IFACEMETHOD_(ULONG, Release)() { return 1; }
+
+  // IDWriteFontFileLoader methods
+  /**
+   * Important! Note the key here -has- to be a pointer to a uint64_t.
+   */
+  virtual HRESULT STDMETHODCALLTYPE CreateStreamFromKey(
+      void const* fontFileReferenceKey, UINT32 fontFileReferenceKeySize,
+      OUT IDWriteFontFileStream** fontFileStream);
+
+  /**
+   * Gets the singleton loader instance. Note that when using this font
+   * loader, the key must be a pointer to a unint64_t.
+   */
+  static IDWriteFontFileLoader* Instance() {
+    if (!mInstance) {
+      mInstance = new gfxDWriteFontFileLoader();
+      mozilla::gfx::Factory::GetDWriteFactory()->RegisterFontFileLoader(
+          mInstance);
+    }
+    return mInstance;
+  }
+
+  /**
+   * Creates a IDWriteFontFile and IDWriteFontFileStream from aFontData.
+   * The data from aFontData will be copied internally, so the caller
+   * is free to dispose of it once this method returns.
+   *
+   * @param aFontData the font data for the custom font file
+   * @param aLength length of the font data
+   * @param aFontFile out param for the created font file
+   * @param aFontFileStream out param for the corresponding stream
+   * @return HRESULT of internal calls
+   */
+  static HRESULT CreateCustomFontFile(const uint8_t* aFontData,
+                                      uint32_t aLength,
+                                      IDWriteFontFile** aFontFile,
+                                      IDWriteFontFileStream** aFontFileStream);
+
+  size_t SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf) const;
+
+ private:
+  static IDWriteFontFileLoader* mInstance;
+};
+
+#endif /* GFX_DWRITECOMMON_H */