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
|
/*
* Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
* Copyright (C) 2007 Alp Toker <alp@atoker.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "third_party/blink/renderer/modules/canvas/canvas2d/canvas_gradient.h"
#include "third_party/blink/renderer/modules/canvas/canvas2d/canvas_pattern.h"
#include "third_party/blink/renderer/modules/canvas/canvas2d/canvas_style.h"
#include "third_party/blink/renderer/platform/bindings/exception_state.h"
namespace blink {
CanvasGradient::CanvasGradient(const FloatPoint& p0, const FloatPoint& p1)
: gradient_(
Gradient::CreateLinear(p0,
p1,
kSpreadMethodPad,
Gradient::ColorInterpolation::kUnpremultiplied,
Gradient::DegenerateHandling::kDisallow)) {
identifiability_study_helper_.MaybeUpdateBuilder(
CanvasOps::kCreateLinearGradient, p0.X(), p0.Y(), p1.X(), p1.Y());
}
CanvasGradient::CanvasGradient(const FloatPoint& p0,
float r0,
const FloatPoint& p1,
float r1)
: gradient_(
Gradient::CreateRadial(p0,
r0,
p1,
r1,
1,
kSpreadMethodPad,
Gradient::ColorInterpolation::kUnpremultiplied,
Gradient::DegenerateHandling::kDisallow)) {
identifiability_study_helper_.MaybeUpdateBuilder(
CanvasOps::kCreateRadialGradient, p0.X(), p0.Y(), r0, p1.X(), p1.Y(), r1);
}
// CanvasRenderingContext2D.createConicGradient only takes one angle argument
// it makes sense to make that rotation here and always make the angles 0 -> 2pi
CanvasGradient::CanvasGradient(float startAngle, const FloatPoint& center)
: gradient_(
Gradient::CreateConic(center,
startAngle,
0,
360,
kSpreadMethodPad,
Gradient::ColorInterpolation::kUnpremultiplied,
Gradient::DegenerateHandling::kDisallow)) {}
void CanvasGradient::addColorStop(double value,
const String& color_string,
ExceptionState& exception_state) {
if (!(value >= 0 && value <= 1.0)) {
exception_state.ThrowDOMException(DOMExceptionCode::kIndexSizeError,
"The provided value (" +
String::Number(value) +
") is outside the range (0.0, 1.0).");
return;
}
Color color = 0;
if (!ParseColorOrCurrentColor(color, color_string, nullptr /*canvas*/)) {
exception_state.ThrowDOMException(DOMExceptionCode::kSyntaxError,
"The value provided ('" + color_string +
"') could not be parsed as a color.");
return;
}
identifiability_study_helper_.MaybeUpdateBuilder(CanvasOps::kAddColorStop,
value, color.Rgb());
gradient_->AddColorStop(value, color);
}
IdentifiableToken CanvasGradient::GetIdentifiableToken() const {
return identifiability_study_helper_.GetToken();
}
} // namespace blink
|
