Index: cc/font_atlas.h |
diff --git a/cc/font_atlas.h b/cc/font_atlas.h |
index 638cbb270ce9b24689d5095baf174ade4f4d1a13..2881ee9a55abc92982b77fb0273e6711f42b21ce 100644 |
--- a/cc/font_atlas.h |
+++ b/cc/font_atlas.h |
@@ -1,3 +1,70 @@ |
// Copyright 2012 The Chromium Authors. All rights reserved. |
// Use of this source code is governed by a BSD-style license that can be |
// found in the LICENSE file. |
+ |
+#ifndef CCFontAtlas_h |
+#define CCFontAtlas_h |
+ |
+#if USE(ACCELERATED_COMPOSITING) |
+ |
+#include <string> |
+ |
+#include "base/basictypes.h" |
+#include "base/memory/scoped_ptr.h" |
+#include "IntRect.h" |
+#include "SkBitmap.h" |
+ |
+class SkCanvas; |
+ |
+namespace gfx { |
+class Point; |
+} |
+ |
+namespace cc { |
+ |
+class Color; |
+class FontDescription; |
+class GraphicsContext; |
+class IntSize; |
+ |
+// This class provides basic ability to draw text onto the heads-up display. |
+class CCFontAtlas { |
+public: |
+ static scoped_ptr<CCFontAtlas> create(SkBitmap bitmap, IntRect asciiToRectTable[128], int fontHeight) |
+ { |
+ return make_scoped_ptr(new CCFontAtlas(bitmap, asciiToRectTable, fontHeight)); |
+ } |
+ ~CCFontAtlas(); |
+ |
+ // Draws multiple lines of text where each line of text is separated by '\n'. |
+ // - Correct glyphs will be drawn for ASCII codes in the range 32-127; any characters |
+ // outside that range will be displayed as a default rectangle glyph. |
+ // - IntSize clip is used to avoid wasting time drawing things that are outside the |
+ // target canvas bounds. |
+ // - Should only be called only on the impl thread. |
+ void drawText(SkCanvas*, const SkPaint&, const std::string& text, const gfx::Point& destPosition, const IntSize& clip) const; |
+ |
+ // Draws the entire atlas at the specified position, just for debugging purposes. |
+ void drawDebugAtlas(SkCanvas*, const gfx::Point& destPosition) const; |
+ |
+private: |
+ CCFontAtlas(SkBitmap, IntRect asciiToRectTable[128], int fontHeight); |
+ |
+ void drawOneLineOfTextInternal(SkCanvas*, const SkPaint&, const std::string&, const gfx::Point& destPosition) const; |
+ |
+ // The actual texture atlas containing all the pre-rendered glyphs. |
+ SkBitmap m_atlas; |
+ |
+ // The look-up tables mapping ascii characters to their IntRect locations on the atlas. |
+ IntRect m_asciiToRectTable[128]; |
+ |
+ int m_fontHeight; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(CCFontAtlas); |
+}; |
+ |
+} // namespace cc |
+ |
+#endif // USE(ACCELERATED_COMPOSITING) |
+ |
+#endif |