1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/csspaint/css_paint_definition.h"
#include <memory>
#include "third_party/blink/renderer/bindings/core/v8/v8_binding_for_core.h"
#include "third_party/blink/renderer/core/css/css_computed_style_declaration.h"
#include "third_party/blink/renderer/core/css/cssom/prepopulated_computed_style_property_map.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/core/layout/layout_object.h"
#include "third_party/blink/renderer/modules/csspaint/paint_rendering_context_2d.h"
#include "third_party/blink/renderer/modules/csspaint/paint_size.h"
#include "third_party/blink/renderer/platform/bindings/script_state.h"
#include "third_party/blink/renderer/platform/bindings/v8_binding_macros.h"
#include "third_party/blink/renderer/platform/bindings/v8_object_constructor.h"
#include "third_party/blink/renderer/platform/graphics/paint_generated_image.h"
namespace blink {
namespace {
FloatSize GetSpecifiedSize(const FloatSize& size, float zoom) {
float un_zoom_factor = 1 / zoom;
auto un_zoom_fn = [un_zoom_factor](float a) -> float {
return a * un_zoom_factor;
};
return FloatSize(un_zoom_fn(size.Width()), un_zoom_fn(size.Height()));
}
} // namespace
CSSPaintDefinition* CSSPaintDefinition::Create(
ScriptState* script_state,
v8::Local<v8::Function> constructor,
v8::Local<v8::Function> paint,
const Vector<CSSPropertyID>& native_invalidation_properties,
const Vector<AtomicString>& custom_invalidation_properties,
const Vector<CSSSyntaxDescriptor>& input_argument_types,
const PaintRenderingContext2DSettings* context_settings) {
return MakeGarbageCollected<CSSPaintDefinition>(
script_state, constructor, paint, native_invalidation_properties,
custom_invalidation_properties, input_argument_types, context_settings);
}
CSSPaintDefinition::CSSPaintDefinition(
ScriptState* script_state,
v8::Local<v8::Function> constructor,
v8::Local<v8::Function> paint,
const Vector<CSSPropertyID>& native_invalidation_properties,
const Vector<AtomicString>& custom_invalidation_properties,
const Vector<CSSSyntaxDescriptor>& input_argument_types,
const PaintRenderingContext2DSettings* context_settings)
: script_state_(script_state),
constructor_(script_state->GetIsolate(), constructor),
paint_(script_state->GetIsolate(), paint),
did_call_constructor_(false),
context_settings_(context_settings) {
native_invalidation_properties_ = native_invalidation_properties;
custom_invalidation_properties_ = custom_invalidation_properties;
input_argument_types_ = input_argument_types;
}
CSSPaintDefinition::~CSSPaintDefinition() = default;
scoped_refptr<Image> CSSPaintDefinition::Paint(
const ImageResourceObserver& client,
const FloatSize& container_size,
const CSSStyleValueVector* paint_arguments) {
// TODO: Break dependency on LayoutObject. Passing the Node should work.
const LayoutObject& layout_object = static_cast<const LayoutObject&>(client);
float zoom = layout_object.StyleRef().EffectiveZoom();
const FloatSize specified_size = GetSpecifiedSize(container_size, zoom);
ScriptState::Scope scope(script_state_);
MaybeCreatePaintInstance();
v8::Isolate* isolate = script_state_->GetIsolate();
v8::Local<v8::Value> instance = instance_.NewLocal(isolate);
// We may have failed to create an instance class, in which case produce an
// invalid image.
if (IsUndefinedOrNull(instance))
return nullptr;
DCHECK(layout_object.GetNode());
CanvasColorParams color_params;
if (!context_settings_->alpha()) {
color_params.SetOpacityMode(kOpaque);
}
// Do subpixel snapping for the |container_size|.
PaintRenderingContext2D* rendering_context = PaintRenderingContext2D::Create(
RoundedIntSize(container_size), color_params, context_settings_, zoom);
PaintSize* paint_size = PaintSize::Create(specified_size);
StylePropertyMapReadOnly* style_map =
MakeGarbageCollected<PrepopulatedComputedStylePropertyMap>(
layout_object.GetDocument(), layout_object.StyleRef(),
layout_object.GetNode(), native_invalidation_properties_,
custom_invalidation_properties_);
Vector<v8::Local<v8::Value>, 4> argv;
if (paint_arguments) {
argv = {
ToV8(rendering_context, script_state_->GetContext()->Global(), isolate),
ToV8(paint_size, script_state_->GetContext()->Global(), isolate),
ToV8(style_map, script_state_->GetContext()->Global(), isolate),
ToV8(*paint_arguments, script_state_->GetContext()->Global(), isolate)};
} else {
argv = {
ToV8(rendering_context, script_state_->GetContext()->Global(), isolate),
ToV8(paint_size, script_state_->GetContext()->Global(), isolate),
ToV8(style_map, script_state_->GetContext()->Global(), isolate)};
}
v8::Local<v8::Function> paint = paint_.NewLocal(isolate);
v8::TryCatch block(isolate);
block.SetVerbose(true);
V8ScriptRunner::CallFunction(paint, ExecutionContext::From(script_state_),
instance, argv.size(), argv.data(), isolate);
// The paint function may have produced an error, in which case produce an
// invalid image.
if (block.HasCaught()) {
return nullptr;
}
return PaintGeneratedImage::Create(rendering_context->GetRecord(),
container_size);
}
void CSSPaintDefinition::MaybeCreatePaintInstance() {
if (did_call_constructor_)
return;
DCHECK(instance_.IsEmpty());
v8::Isolate* isolate = script_state_->GetIsolate();
v8::Local<v8::Function> constructor = constructor_.NewLocal(isolate);
DCHECK(!IsUndefinedOrNull(constructor));
v8::Local<v8::Value> paint_instance;
if (V8ScriptRunner::CallAsConstructor(
isolate, constructor, ExecutionContext::From(script_state_), 0, {})
.ToLocal(&paint_instance))
instance_.Set(isolate, paint_instance);
did_call_constructor_ = true;
}
void CSSPaintDefinition::Trace(Visitor* visitor) {
visitor->Trace(constructor_);
visitor->Trace(paint_);
visitor->Trace(instance_);
visitor->Trace(context_settings_);
visitor->Trace(script_state_);
}
} // namespace blink
|
