1 files changed, 50 insertions, 0 deletions
diff --git a/system/graphics/layers/composite/TextRenderer.h b/system/graphics/layers/composite/TextRenderer.h
new file mode 100644
index 000000000..7665558eb
--- /dev/null
+++ b/system/graphics/layers/composite/TextRenderer.h
@@ -0,0 +1,50 @@
+/* -*- 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_TextRenderer_H
+#define GFX_TextRenderer_H
+
+#include "mozilla/gfx/2D.h"
+#include "nsISupportsImpl.h"
+#include <string>
+
+namespace mozilla {
+namespace layers {
+
+class Compositor;
+
+class TextRenderer
+{
+  ~TextRenderer();
+
+public:
+  NS_INLINE_DECL_REFCOUNTING(TextRenderer)
+
+  explicit TextRenderer(Compositor *aCompositor)
+    : mCompositor(aCompositor), mMap({nullptr, 0})
+  {
+  }
+
+  void RenderText(const std::string& aText, const gfx::IntPoint& aOrigin,
+                  const gfx::Matrix4x4& aTransform, uint32_t aTextSize,
+                  uint32_t aTargetPixelWidth);
+
+  gfx::DataSourceSurface::MappedSurface& GetSurfaceMap() { return mMap; }
+
+private:
+
+  // Note that this may still fail to set mGlyphBitmaps to a valid value
+  // if the underlying CreateDataSourceSurface fails for some reason.
+  void EnsureInitialized();
+
+  RefPtr<Compositor> mCompositor;
+  RefPtr<gfx::DataSourceSurface> mGlyphBitmaps;
+  gfx::DataSourceSurface::MappedSurface mMap;
+};
+
+} // namespace layers
+} // namespace mozilla
+
+#endif