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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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