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1 // Copyright 2012 The Chromium Authors. All rights reserved. | 1 // Copyright 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CCFontAtlas_h | 5 // Temporary forwarding header |
6 #define CCFontAtlas_h | 6 #include "cc/font_atlas.h" |
7 | |
8 #if USE(ACCELERATED_COMPOSITING) | |
9 | |
10 #include <string> | |
11 | |
12 #include "base/basictypes.h" | |
13 #include "base/memory/scoped_ptr.h" | |
14 #include "IntRect.h" | |
15 #include "SkBitmap.h" | |
16 | |
17 class SkCanvas; | |
18 | |
19 namespace gfx { | |
20 class Point; | |
21 } | |
22 | |
23 namespace cc { | |
24 | |
25 class Color; | |
26 class FontDescription; | |
27 class GraphicsContext; | |
28 class IntSize; | |
29 | |
30 // This class provides basic ability to draw text onto the heads-up display. | |
31 class CCFontAtlas { | |
32 public: | |
33 static scoped_ptr<CCFontAtlas> create(SkBitmap bitmap, IntRect asciiToRectTa
ble[128], int fontHeight) | |
34 { | |
35 return make_scoped_ptr(new CCFontAtlas(bitmap, asciiToRectTable, fontHei
ght)); | |
36 } | |
37 ~CCFontAtlas(); | |
38 | |
39 // Draws multiple lines of text where each line of text is separated by '\n'
. | |
40 // - Correct glyphs will be drawn for ASCII codes in the range 32-127; any c
haracters | |
41 // outside that range will be displayed as a default rectangle glyph. | |
42 // - IntSize clip is used to avoid wasting time drawing things that are outs
ide the | |
43 // target canvas bounds. | |
44 // - Should only be called only on the impl thread. | |
45 void drawText(SkCanvas*, const SkPaint&, const std::string& text, const gfx:
:Point& destPosition, const IntSize& clip) const; | |
46 | |
47 // Draws the entire atlas at the specified position, just for debugging purp
oses. | |
48 void drawDebugAtlas(SkCanvas*, const gfx::Point& destPosition) const; | |
49 | |
50 private: | |
51 CCFontAtlas(SkBitmap, IntRect asciiToRectTable[128], int fontHeight); | |
52 | |
53 void drawOneLineOfTextInternal(SkCanvas*, const SkPaint&, const std::string&
, const gfx::Point& destPosition) const; | |
54 | |
55 // The actual texture atlas containing all the pre-rendered glyphs. | |
56 SkBitmap m_atlas; | |
57 | |
58 // The look-up tables mapping ascii characters to their IntRect locations on
the atlas. | |
59 IntRect m_asciiToRectTable[128]; | |
60 | |
61 int m_fontHeight; | |
62 | |
63 DISALLOW_COPY_AND_ASSIGN(CCFontAtlas); | |
64 }; | |
65 | |
66 } // namespace cc | |
67 | |
68 #endif // USE(ACCELERATED_COMPOSITING) | |
69 | |
70 #endif | |
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