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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 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 #include "ui/gfx/render_text.h" | 5 #include "ui/gfx/render_text.h" |
6 | 6 |
7 #include <limits.h> | 7 #include <limits.h> |
8 | 8 |
9 #include <algorithm> | 9 #include <algorithm> |
10 #include <climits> | 10 #include <climits> |
11 | 11 |
12 #include "base/command_line.h" | 12 #include "base/command_line.h" |
13 #include "base/i18n/break_iterator.h" | 13 #include "base/i18n/break_iterator.h" |
14 #include "base/logging.h" | 14 #include "base/logging.h" |
| 15 #include "base/memory/ptr_util.h" |
15 #include "base/stl_util.h" | 16 #include "base/stl_util.h" |
16 #include "base/strings/string_util.h" | 17 #include "base/strings/string_util.h" |
17 #include "base/strings/utf_string_conversions.h" | 18 #include "base/strings/utf_string_conversions.h" |
18 #include "base/trace_event/trace_event.h" | 19 #include "base/trace_event/trace_event.h" |
19 #include "build/build_config.h" | 20 #include "build/build_config.h" |
20 #include "cc/paint/paint_canvas.h" | 21 #include "cc/paint/paint_canvas.h" |
21 #include "cc/paint/paint_shader.h" | 22 #include "cc/paint/paint_shader.h" |
22 #include "third_party/icu/source/common/unicode/rbbi.h" | 23 #include "third_party/icu/source/common/unicode/rbbi.h" |
23 #include "third_party/icu/source/common/unicode/utf16.h" | 24 #include "third_party/icu/source/common/unicode/utf16.h" |
24 #include "third_party/skia/include/core/SkDrawLooper.h" | 25 #include "third_party/skia/include/core/SkDrawLooper.h" |
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98 colors->push_back(c0); | 99 colors->push_back(c0); |
99 } | 100 } |
100 positions->push_back(p0); | 101 positions->push_back(p0); |
101 colors->push_back(c0); | 102 colors->push_back(c0); |
102 positions->push_back(p1); | 103 positions->push_back(p1); |
103 colors->push_back(c1); | 104 colors->push_back(c1); |
104 } | 105 } |
105 | 106 |
106 // Creates a SkShader to fade the text, with |left_part| specifying the left | 107 // Creates a SkShader to fade the text, with |left_part| specifying the left |
107 // fade effect, if any, and |right_part| specifying the right fade effect. | 108 // fade effect, if any, and |right_part| specifying the right fade effect. |
108 sk_sp<SkShader> CreateFadeShader(const FontList& font_list, | 109 std::unique_ptr<cc::PaintShader> CreateFadeShader(const FontList& font_list, |
109 const Rect& text_rect, | 110 const Rect& text_rect, |
110 const Rect& left_part, | 111 const Rect& left_part, |
111 const Rect& right_part, | 112 const Rect& right_part, |
112 SkColor color) { | 113 SkColor color) { |
113 // The shader should only specify transparency of the fade itself, not the | 114 // The shader should only specify transparency of the fade itself, not the |
114 // original transparency, which will be applied by the actual renderer. | 115 // original transparency, which will be applied by the actual renderer. |
115 DCHECK_EQ(SkColorGetA(color), static_cast<uint8_t>(0xff)); | 116 DCHECK_EQ(SkColorGetA(color), static_cast<uint8_t>(0xff)); |
116 | 117 |
117 // In general, fade down to 0 alpha. But when the available width is less | 118 // In general, fade down to 0 alpha. But when the available width is less |
118 // than four characters, linearly ramp up the fade target alpha to as high as | 119 // than four characters, linearly ramp up the fade target alpha to as high as |
119 // 20% at zero width. This allows the user to see the last faded characters a | 120 // 20% at zero width. This allows the user to see the last faded characters a |
120 // little better when there are only a few characters shown. | 121 // little better when there are only a few characters shown. |
121 const float width_fraction = | 122 const float width_fraction = |
122 text_rect.width() / static_cast<float>(font_list.GetExpectedTextWidth(4)); | 123 text_rect.width() / static_cast<float>(font_list.GetExpectedTextWidth(4)); |
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137 DCHECK(!positions.empty()); | 138 DCHECK(!positions.empty()); |
138 | 139 |
139 // Terminate |positions| with 1.0, as required by Skia. | 140 // Terminate |positions| with 1.0, as required by Skia. |
140 if (positions.back() != 1.0) { | 141 if (positions.back() != 1.0) { |
141 positions.push_back(1.0); | 142 positions.push_back(1.0); |
142 colors.push_back(colors.back()); | 143 colors.push_back(colors.back()); |
143 } | 144 } |
144 | 145 |
145 const SkPoint points[2] = { PointToSkPoint(text_rect.origin()), | 146 const SkPoint points[2] = { PointToSkPoint(text_rect.origin()), |
146 PointToSkPoint(text_rect.top_right()) }; | 147 PointToSkPoint(text_rect.top_right()) }; |
147 return | 148 return base::MakeUnique<cc::PaintShader>(&points[0], &colors[0], |
148 SkGradientShader::MakeLinear(&points[0], &colors[0], &positions[0], | 149 &positions[0], colors.size(), |
149 colors.size(), SkShader::kClamp_TileMode); | 150 SkShader::kClamp_TileMode); |
150 } | 151 } |
151 | 152 |
152 // Converts a FontRenderParams::Hinting value to the corresponding | 153 // Converts a FontRenderParams::Hinting value to the corresponding |
153 // cc::PaintFlags::Hinting value. | 154 // cc::PaintFlags::Hinting value. |
154 cc::PaintFlags::Hinting FontRenderParamsHintingToPaintFlagsHinting( | 155 cc::PaintFlags::Hinting FontRenderParamsHintingToPaintFlagsHinting( |
155 FontRenderParams::Hinting params_hinting) { | 156 FontRenderParams::Hinting params_hinting) { |
156 switch (params_hinting) { | 157 switch (params_hinting) { |
157 case FontRenderParams::HINTING_NONE: | 158 case FontRenderParams::HINTING_NONE: |
158 return cc::PaintFlags::kNo_Hinting; | 159 return cc::PaintFlags::kNo_Hinting; |
159 case FontRenderParams::HINTING_SLIGHT: | 160 case FontRenderParams::HINTING_SLIGHT: |
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224 } | 225 } |
225 | 226 |
226 void SkiaTextRenderer::SetTextSize(SkScalar size) { | 227 void SkiaTextRenderer::SetTextSize(SkScalar size) { |
227 flags_.setTextSize(size); | 228 flags_.setTextSize(size); |
228 } | 229 } |
229 | 230 |
230 void SkiaTextRenderer::SetForegroundColor(SkColor foreground) { | 231 void SkiaTextRenderer::SetForegroundColor(SkColor foreground) { |
231 flags_.setColor(foreground); | 232 flags_.setColor(foreground); |
232 } | 233 } |
233 | 234 |
234 void SkiaTextRenderer::SetShader(sk_sp<SkShader> shader) { | 235 void SkiaTextRenderer::SetShader(std::unique_ptr<cc::PaintShader> shader) { |
235 flags_.setShader(cc::WrapSkShader(std::move(shader))); | 236 flags_.setShader(std::move(shader)); |
236 } | 237 } |
237 | 238 |
238 void SkiaTextRenderer::SetUnderlineMetrics(SkScalar thickness, | 239 void SkiaTextRenderer::SetUnderlineMetrics(SkScalar thickness, |
239 SkScalar position) { | 240 SkScalar position) { |
240 underline_thickness_ = thickness; | 241 underline_thickness_ = thickness; |
241 underline_position_ = position; | 242 underline_position_ = position; |
242 } | 243 } |
243 | 244 |
244 void SkiaTextRenderer::DrawPosText(const SkPoint* pos, | 245 void SkiaTextRenderer::DrawPosText(const SkPoint* pos, |
245 const uint16_t* glyphs, | 246 const uint16_t* glyphs, |
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1696 | 1697 |
1697 for (; range_max < length; ++range_max) | 1698 for (; range_max < length; ++range_max) |
1698 if (iter.IsEndOfWord(range_max) || iter.IsStartOfWord(range_max)) | 1699 if (iter.IsEndOfWord(range_max) || iter.IsStartOfWord(range_max)) |
1699 break; | 1700 break; |
1700 | 1701 |
1701 return range.is_reversed() ? Range(range_max, range_min) | 1702 return range.is_reversed() ? Range(range_max, range_min) |
1702 : Range(range_min, range_max); | 1703 : Range(range_min, range_max); |
1703 } | 1704 } |
1704 | 1705 |
1705 } // namespace gfx | 1706 } // namespace gfx |
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