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| 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 | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "config.h" | |
| 6 | |
| 7 #if USE(ACCELERATED_COMPOSITING) | |
| 8 #include "CCFontAtlas.h" | |
| 9 | |
| 10 #include "base/string_split.h" | |
| 11 #include "ui/gfx/point.h" | |
| 12 #include "CCProxy.h" | |
| 13 #include "SkCanvas.h" | |
| 14 #include <vector> | |
| 15 | |
| 16 namespace cc { | |
| 17 | |
| 18 using namespace std; | |
| 19 | |
| 20 CCFontAtlas::CCFontAtlas(SkBitmap bitmap, IntRect asciiToRectTable[128], int fon
tHeight) | |
| 21 : m_atlas(bitmap) | |
| 22 , m_fontHeight(fontHeight) | |
| 23 { | |
| 24 for (size_t i = 0; i < 128; ++i) | |
| 25 m_asciiToRectTable[i] = asciiToRectTable[i]; | |
| 26 } | |
| 27 | |
| 28 CCFontAtlas::~CCFontAtlas() | |
| 29 { | |
| 30 } | |
| 31 | |
| 32 void CCFontAtlas::drawText(SkCanvas* canvas, const SkPaint& paint, const std::st
ring& text, const gfx::Point& destPosition, const IntSize& clip) const | |
| 33 { | |
| 34 ASSERT(CCProxy::isImplThread()); | |
| 35 | |
| 36 std::vector<std::string> lines; | |
| 37 base::SplitString(text, '\n', &lines); | |
| 38 | |
| 39 gfx::Point position = destPosition; | |
| 40 for (size_t i = 0; i < lines.size(); ++i) { | |
| 41 drawOneLineOfTextInternal(canvas, paint, lines[i], position); | |
| 42 position.set_y(position.y() + m_fontHeight); | |
| 43 if (position.y() > clip.height()) | |
| 44 return; | |
| 45 } | |
| 46 } | |
| 47 | |
| 48 void CCFontAtlas::drawOneLineOfTextInternal(SkCanvas* canvas, const SkPaint& pai
nt, const std::string& textLine, const gfx::Point& destPosition) const | |
| 49 { | |
| 50 ASSERT(CCProxy::isImplThread()); | |
| 51 | |
| 52 gfx::Point position = destPosition; | |
| 53 for (unsigned i = 0; i < textLine.length(); ++i) { | |
| 54 // If the ASCII code is out of bounds, then index 0 is used, which is ju
st a plain rectangle glyph. | |
| 55 int asciiIndex = (textLine[i] < 128) ? textLine[i] : 0; | |
| 56 IntRect glyphBounds = m_asciiToRectTable[asciiIndex]; | |
| 57 SkIRect source = SkIRect::MakeXYWH(glyphBounds.x(), glyphBounds.y(), gly
phBounds.width(), glyphBounds.height()); | |
| 58 canvas->drawBitmapRect(m_atlas, &source, SkRect::MakeXYWH(position.x(),
position.y(), glyphBounds.width(), glyphBounds.height()), &paint); | |
| 59 position.set_x(position.x() + glyphBounds.width()); | |
| 60 } | |
| 61 } | |
| 62 | |
| 63 void CCFontAtlas::drawDebugAtlas(SkCanvas* canvas, const gfx::Point& destPositio
n) const | |
| 64 { | |
| 65 ASSERT(CCProxy::isImplThread()); | |
| 66 | |
| 67 SkIRect source = SkIRect::MakeWH(m_atlas.width(), m_atlas.height()); | |
| 68 canvas->drawBitmapRect(m_atlas, &source, SkRect::MakeXYWH(destPosition.x(),
destPosition.y(), m_atlas.width(), m_atlas.height())); | |
| 69 } | |
| 70 | |
| 71 } // namespace cc | |
| 72 | |
| 73 #endif // USE(ACCELERATED_COMPOSITING) | |
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