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Side by Side Diff: content/renderer/compositor_bindings/web_layer_impl_fixed_bounds.cc

Issue 470983004: Move blink<->cc bindings to cc/blink (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: rebase Created 6 years, 4 months ago
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1 // Copyright 2014 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 "content/renderer/compositor_bindings/web_layer_impl_fixed_bounds.h"
6
7 #include "cc/layers/layer.h"
8 #include "third_party/WebKit/public/platform/WebFloatPoint.h"
9 #include "third_party/WebKit/public/platform/WebSize.h"
10 #include "third_party/skia/include/utils/SkMatrix44.h"
11
12 using cc::Layer;
13
14 namespace content {
15
16 WebLayerImplFixedBounds::WebLayerImplFixedBounds() {
17 }
18
19 WebLayerImplFixedBounds::WebLayerImplFixedBounds(scoped_refptr<Layer> layer)
20 : WebLayerImpl(layer) {
21 }
22
23 WebLayerImplFixedBounds::~WebLayerImplFixedBounds() {
24 }
25
26 void WebLayerImplFixedBounds::invalidateRect(const blink::WebFloatRect& rect) {
27 // Partial invalidations seldom occur for such layers.
28 // Simply invalidate the whole layer to avoid transformation of coordinates.
29 invalidate();
30 }
31
32 void WebLayerImplFixedBounds::setTransformOrigin(
33 const blink::WebFloatPoint3D& transform_origin) {
34 if (transform_origin != this->transformOrigin()) {
35 layer_->SetTransformOrigin(transform_origin);
36 UpdateLayerBoundsAndTransform();
37 }
38 }
39
40 void WebLayerImplFixedBounds::setBounds(const blink::WebSize& bounds) {
41 if (original_bounds_ != gfx::Size(bounds)) {
42 original_bounds_ = bounds;
43 UpdateLayerBoundsAndTransform();
44 }
45 }
46
47 blink::WebSize WebLayerImplFixedBounds::bounds() const {
48 return original_bounds_;
49 }
50
51 void WebLayerImplFixedBounds::setTransform(const SkMatrix44& matrix) {
52 gfx::Transform transform;
53 transform.matrix() = matrix;
54 SetTransformInternal(transform);
55 }
56
57 SkMatrix44 WebLayerImplFixedBounds::transform() const {
58 return original_transform_.matrix();
59 }
60
61 void WebLayerImplFixedBounds::SetFixedBounds(gfx::Size fixed_bounds) {
62 if (fixed_bounds_ != fixed_bounds) {
63 fixed_bounds_ = fixed_bounds;
64 UpdateLayerBoundsAndTransform();
65 }
66 }
67
68 void WebLayerImplFixedBounds::SetTransformInternal(
69 const gfx::Transform& transform) {
70 if (original_transform_ != transform) {
71 original_transform_ = transform;
72 UpdateLayerBoundsAndTransform();
73 }
74 }
75
76 void WebLayerImplFixedBounds::UpdateLayerBoundsAndTransform() {
77 if (fixed_bounds_.IsEmpty() || original_bounds_.IsEmpty() ||
78 fixed_bounds_ == original_bounds_ ||
79 // For now fall back to non-fixed bounds for non-zero transform origin.
80 // TODO(wangxianzhu): Support non-zero anchor point for fixed bounds.
81 transformOrigin().x ||
82 transformOrigin().y) {
83 layer_->SetBounds(original_bounds_);
84 layer_->SetTransform(original_transform_);
85 return;
86 }
87
88 layer_->SetBounds(fixed_bounds_);
89
90 // Apply bounds scale (bounds/fixed_bounds) over original transform.
91 gfx::Transform transform_with_bounds_scale(original_transform_);
92 float bounds_scale_x =
93 static_cast<float>(original_bounds_.width()) / fixed_bounds_.width();
94 float bounds_scale_y =
95 static_cast<float>(original_bounds_.height()) / fixed_bounds_.height();
96 transform_with_bounds_scale.Scale(bounds_scale_x, bounds_scale_y);
97 layer_->SetTransform(transform_with_bounds_scale);
98 }
99
100 } // namespace content
101
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