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| 1 // Copyright (c) 2017 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 "ui/views/paint_info.h" |
| 6 |
| 7 namespace views { |
| 8 |
| 9 PaintInfo::PaintInfo(const ui::PaintContext& context, const gfx::Size& size) |
| 10 : paint_recording_scale_x_( |
| 11 context.is_pixel_canvas() ? context.device_scale_factor() : 1.f), |
| 12 paint_recording_scale_y_(paint_recording_scale_x_), |
| 13 paint_recording_bounds_( |
| 14 gfx::ScaleToRoundedRect(gfx::Rect(size), paint_recording_scale_x_)), |
| 15 context_(context, gfx::Vector2d()), |
| 16 root_context_(&context) {} |
| 17 |
| 18 PaintInfo::PaintInfo(const PaintInfo& other, |
| 19 const gfx::Rect& bounds, |
| 20 const gfx::Rect& parent_bounds, |
| 21 ScaleType scale_type) |
| 22 : paint_recording_bounds_( |
| 23 other.GetSnappedRecordingBounds(parent_bounds, bounds)), |
| 24 offset_from_parent_(paint_recording_bounds_.OffsetFromOrigin() - |
| 25 other.paint_recording_bounds_.OffsetFromOrigin()), |
| 26 context_(other.context(), offset_from_parent_), |
| 27 root_context_(nullptr) { |
| 28 ComputePaintRecordingScales(bounds.size(), scale_type); |
| 29 } |
| 30 |
| 31 PaintInfo::PaintInfo(const PaintInfo& other) |
| 32 : paint_recording_scale_x_(other.paint_recording_scale_x_), |
| 33 paint_recording_scale_y_(other.paint_recording_scale_y_), |
| 34 paint_recording_bounds_(other.paint_recording_bounds_), |
| 35 offset_from_parent_(other.offset_from_parent_), |
| 36 context_(other.context(), ui::PaintContext::CLONE_WITHOUT_INVALIDATION), |
| 37 root_context_(nullptr) {} |
| 38 |
| 39 PaintInfo::~PaintInfo() {} |
| 40 |
| 41 bool PaintInfo::IsPixelCanvas() const { |
| 42 return context().is_pixel_canvas(); |
| 43 } |
| 44 |
| 45 void PaintInfo::ComputePaintRecordingScales(const gfx::Size& size, |
| 46 ScaleType scale_type) { |
| 47 if (!IsPixelCanvas()) { |
| 48 // If pixel canvas is disabled, all recordings are done in DIPs. These are |
| 49 // later played back on to the raster canvas at |device_scale_factor_|. |
| 50 paint_recording_scale_x_ = paint_recording_scale_y_ = 1.f; |
| 51 return; |
| 52 } |
| 53 |
| 54 paint_recording_scale_x_ = paint_recording_scale_y_ = |
| 55 context().device_scale_factor(); |
| 56 if (scale_type == ScaleType::kScaleToScaleFactor) |
| 57 return; |
| 58 |
| 59 if (size.width() > 0) { |
| 60 paint_recording_scale_x_ = |
| 61 static_cast<float>(paint_recording_bounds_.width()) / |
| 62 static_cast<float>(size.width()); |
| 63 } |
| 64 |
| 65 if (size.height() > 0) { |
| 66 paint_recording_scale_y_ = |
| 67 static_cast<float>(paint_recording_bounds_.height()) / |
| 68 static_cast<float>(size.height()); |
| 69 } |
| 70 } |
| 71 |
| 72 gfx::Rect PaintInfo::GetSnappedRecordingBounds( |
| 73 const gfx::Rect& parent_bounds, |
| 74 const gfx::Rect& child_bounds) const { |
| 75 if (!IsPixelCanvas()) |
| 76 return (child_bounds + paint_recording_bounds_.OffsetFromOrigin()); |
| 77 |
| 78 const gfx::Vector2d& child_origin = child_bounds.OffsetFromOrigin(); |
| 79 |
| 80 int right = child_origin.x() + child_bounds.width(); |
| 81 int bottom = child_origin.y() + child_bounds.height(); |
| 82 |
| 83 int new_x = std::round(child_origin.x() * context().device_scale_factor()); |
| 84 int new_y = std::round(child_origin.y() * context().device_scale_factor()); |
| 85 |
| 86 int new_right; |
| 87 int new_bottom; |
| 88 |
| 89 if (right == parent_bounds.width()) { |
| 90 new_right = paint_recording_bounds_.width(); |
| 91 } else { |
| 92 new_right = std::round(right * context().device_scale_factor()); |
| 93 } |
| 94 |
| 95 if (bottom == parent_bounds.height()) { |
| 96 new_bottom = paint_recording_bounds_.height(); |
| 97 } else { |
| 98 new_bottom = std::round(bottom * context().device_scale_factor()); |
| 99 } |
| 100 |
| 101 return gfx::Rect(new_x + paint_recording_bounds_.x(), |
| 102 new_y + paint_recording_bounds_.y(), new_right - new_x, |
| 103 new_bottom - new_y); |
| 104 } |
| 105 |
| 106 } // namespace views |
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