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-rw-r--r--gfx/2d/NativeFontResourceGDI.cpp63
1 files changed, 63 insertions, 0 deletions
diff --git a/gfx/2d/NativeFontResourceGDI.cpp b/gfx/2d/NativeFontResourceGDI.cpp
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+++ b/gfx/2d/NativeFontResourceGDI.cpp
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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
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "NativeFontResourceGDI.h"
+
+#include "Logging.h"
+#include "mozilla/RefPtr.h"
+#include "ScaledFontWin.h"
+
+namespace mozilla {
+namespace gfx {
+
+/* static */
+already_AddRefed<NativeFontResourceGDI>
+NativeFontResourceGDI::Create(uint8_t *aFontData, uint32_t aDataLength,
+ bool aNeedsCairo)
+{
+ DWORD numberOfFontsAdded;
+ HANDLE fontResourceHandle = ::AddFontMemResourceEx(aFontData, aDataLength,
+ 0, &numberOfFontsAdded);
+ if (!fontResourceHandle) {
+ gfxWarning() << "Failed to add memory font resource.";
+ return nullptr;
+ }
+
+ RefPtr<NativeFontResourceGDI> fontResouce =
+ new NativeFontResourceGDI(fontResourceHandle, aNeedsCairo);
+
+ return fontResouce.forget();
+}
+
+NativeFontResourceGDI::~NativeFontResourceGDI()
+{
+ ::RemoveFontMemResourceEx(mFontResourceHandle);
+}
+
+already_AddRefed<ScaledFont>
+NativeFontResourceGDI::CreateScaledFont(uint32_t aIndex, Float aGlyphSize,
+ const uint8_t* aInstanceData, uint32_t aInstanceDataLength)
+{
+ if (aInstanceDataLength < sizeof(LOGFONT)) {
+ gfxWarning() << "GDI scaled font instance data is truncated.";
+ return nullptr;
+ }
+
+ const LOGFONT* logFont = reinterpret_cast<const LOGFONT*>(aInstanceData);
+
+ // Constructor for ScaledFontWin dereferences and copies the LOGFONT, so we
+ // are safe to pass this reference.
+ RefPtr<ScaledFontBase> scaledFont = new ScaledFontWin(logFont, aGlyphSize);
+ if (mNeedsCairo && !scaledFont->PopulateCairoScaledFont()) {
+ gfxWarning() << "Unable to create cairo scaled font GDI font.";
+ return nullptr;
+ }
+
+ return scaledFont.forget();
+}
+
+} // gfx
+} // mozilla