Index: ui/views/paint_info.cc |
diff --git a/ui/views/paint_info.cc b/ui/views/paint_info.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..091b25e23afa4632766e914399416f41be20a678 |
--- /dev/null |
+++ b/ui/views/paint_info.cc |
@@ -0,0 +1,106 @@ |
+// Copyright (c) 2017 The Chromium Authors. All rights reserved. |
sky
2017/07/26 22:12:11
no (c)
malaykeshav
2017/07/28 01:24:37
Done
|
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#include "ui/views/paint_info.h" |
+ |
+namespace views { |
+ |
+PaintInfo::PaintInfo(const ui::PaintContext& context, const gfx::Size& size) |
+ : paint_recording_scale_x_( |
+ context.is_pixel_canvas() ? context.device_scale_factor() : 1.f), |
+ paint_recording_scale_y_(paint_recording_scale_x_), |
+ paint_recording_bounds_( |
+ gfx::ScaleToRoundedRect(gfx::Rect(size), paint_recording_scale_x_)), |
+ context_(context, gfx::Vector2d()), |
+ root_context_(&context) {} |
+ |
+PaintInfo::PaintInfo(const PaintInfo& other, |
+ const gfx::Rect& bounds, |
+ const gfx::Rect& parent_bounds, |
+ ScaleType scale_type) |
+ : paint_recording_bounds_( |
sky
2017/07/26 22:12:11
Make sure to member initialize paint_recording_sca
malaykeshav
2017/07/28 01:24:37
Done
|
+ other.GetSnappedRecordingBounds(parent_bounds, bounds)), |
+ offset_from_parent_(paint_recording_bounds_.OffsetFromOrigin() - |
+ other.paint_recording_bounds_.OffsetFromOrigin()), |
+ context_(other.context(), offset_from_parent_), |
+ root_context_(nullptr) { |
sky
2017/07/26 22:12:11
How come this doesn't set root_context_? I think t
malaykeshav
2017/07/28 01:24:37
Done
|
+ ComputePaintRecordingScales(bounds.size(), scale_type); |
+} |
+ |
+PaintInfo::PaintInfo(const PaintInfo& other) |
+ : paint_recording_scale_x_(other.paint_recording_scale_x_), |
+ paint_recording_scale_y_(other.paint_recording_scale_y_), |
+ paint_recording_bounds_(other.paint_recording_bounds_), |
+ offset_from_parent_(other.offset_from_parent_), |
+ context_(other.context(), ui::PaintContext::CLONE_WITHOUT_INVALIDATION), |
+ root_context_(nullptr) {} |
+ |
+PaintInfo::~PaintInfo() {} |
+ |
+bool PaintInfo::IsPixelCanvas() const { |
+ return context().is_pixel_canvas(); |
+} |
+ |
+void PaintInfo::ComputePaintRecordingScales(const gfx::Size& size, |
+ ScaleType scale_type) { |
+ if (!IsPixelCanvas()) { |
+ // If pixel canvas is disabled, all recordings are done in DIPs. These are |
+ // later played back on to the raster canvas at |device_scale_factor_|. |
+ paint_recording_scale_x_ = paint_recording_scale_y_ = 1.f; |
+ return; |
+ } |
+ |
+ paint_recording_scale_x_ = paint_recording_scale_y_ = |
+ context().device_scale_factor(); |
+ if (scale_type == ScaleType::kScaleToScaleFactor) |
+ return; |
+ |
+ if (size.width() > 0) { |
+ paint_recording_scale_x_ = |
+ static_cast<float>(paint_recording_bounds_.width()) / |
+ static_cast<float>(size.width()); |
+ } |
+ |
+ if (size.height() > 0) { |
+ paint_recording_scale_y_ = |
+ static_cast<float>(paint_recording_bounds_.height()) / |
+ static_cast<float>(size.height()); |
+ } |
+} |
+ |
+gfx::Rect PaintInfo::GetSnappedRecordingBounds( |
+ const gfx::Rect& parent_bounds, |
sky
2017/07/26 22:12:11
Don't the coordinate system of the two rects diffe
malaykeshav
2017/07/28 01:24:37
Yes. parent_bounds are not needed. parent_size is
|
+ const gfx::Rect& child_bounds) const { |
+ if (!IsPixelCanvas()) |
+ return (child_bounds + paint_recording_bounds_.OffsetFromOrigin()); |
+ |
+ const gfx::Vector2d& child_origin = child_bounds.OffsetFromOrigin(); |
+ |
+ int right = child_origin.x() + child_bounds.width(); |
+ int bottom = child_origin.y() + child_bounds.height(); |
+ |
+ int new_x = std::round(child_origin.x() * context().device_scale_factor()); |
+ int new_y = std::round(child_origin.y() * context().device_scale_factor()); |
+ |
+ int new_right; |
+ int new_bottom; |
+ |
+ if (right == parent_bounds.width()) { |
sky
2017/07/26 22:12:11
no {}
sky
2017/07/26 22:12:11
Might rounding give you a size > parent_bounds.wid
malaykeshav
2017/07/28 01:24:37
Both the values are in DIP, so there should be no
malaykeshav
2017/07/28 01:24:37
Done.
sky
2017/07/28 16:02:11
Actually, I'm a little confused by why you need to
|
+ new_right = paint_recording_bounds_.width(); |
+ } else { |
+ new_right = std::round(right * context().device_scale_factor()); |
+ } |
+ |
+ if (bottom == parent_bounds.height()) { |
+ new_bottom = paint_recording_bounds_.height(); |
+ } else { |
+ new_bottom = std::round(bottom * context().device_scale_factor()); |
+ } |
+ |
+ return gfx::Rect(new_x + paint_recording_bounds_.x(), |
+ new_y + paint_recording_bounds_.y(), new_right - new_x, |
+ new_bottom - new_y); |
+} |
+ |
+} // namespace views |