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/*
* 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/public/common/privacy_budget/identifiable_token.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_color_interpolation_method.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_hue_interpolation_method.h"
#include "third_party/blink/renderer/modules/canvas/canvas2d/canvas_style.h"
#include "third_party/blink/renderer/modules/canvas/canvas2d/identifiability_study_helper.h"
#include "third_party/blink/renderer/platform/bindings/exception_code.h"
#include "third_party/blink/renderer/platform/bindings/exception_state.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
#include "third_party/blink/renderer/platform/graphics/color.h"
#include "third_party/blink/renderer/platform/graphics/gradient.h"
#include "third_party/blink/renderer/platform/heap/visitor.h"
#include "third_party/blink/renderer/platform/wtf/text/string_operators.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "ui/gfx/geometry/point_f.h"
namespace blink {
class ExecutionContext;
static Color::ColorSpace V8ColorSpaceToColorSpace(
V8ColorInterpolationMethod v8_color_space) {
switch (v8_color_space.AsEnum()) {
case V8ColorInterpolationMethod::Enum::kSRGB:
return Color::ColorSpace::kSRGB;
case V8ColorInterpolationMethod::Enum::kHsl:
return Color::ColorSpace::kHSL;
case V8ColorInterpolationMethod::Enum::kHwb:
return Color::ColorSpace::kHWB;
case V8ColorInterpolationMethod::Enum::kSRGBLinear:
return Color::ColorSpace::kSRGBLinear;
case V8ColorInterpolationMethod::Enum::kDisplayP3:
return Color::ColorSpace::kDisplayP3;
case V8ColorInterpolationMethod::Enum::kA98Rgb:
return Color::ColorSpace::kA98RGB;
case V8ColorInterpolationMethod::Enum::kProphotoRgb:
return Color::ColorSpace::kProPhotoRGB;
case V8ColorInterpolationMethod::Enum::kRec2020:
return Color::ColorSpace::kRec2020;
case V8ColorInterpolationMethod::Enum::kLab:
return Color::ColorSpace::kLab;
case V8ColorInterpolationMethod::Enum::kOklab:
return Color::ColorSpace::kOklab;
case V8ColorInterpolationMethod::Enum::kLch:
return Color::ColorSpace::kLch;
case V8ColorInterpolationMethod::Enum::kOklch:
return Color::ColorSpace::kOklch;
case V8ColorInterpolationMethod::Enum::kXyz:
return Color::ColorSpace::kXYZD50;
case V8ColorInterpolationMethod::Enum::kXyzD50:
return Color::ColorSpace::kXYZD50;
case V8ColorInterpolationMethod::Enum::kXyzD65:
return Color::ColorSpace::kXYZD65;
}
return Color::ColorSpace::kNone;
}
static Color::HueInterpolationMethod
V8HueInterpolationMethodToHueInterpolationMethod(
V8HueInterpolationMethod v8_hue_method) {
switch (v8_hue_method.AsEnum()) {
case V8HueInterpolationMethod::Enum::kShorter:
return Color::HueInterpolationMethod::kShorter;
case V8HueInterpolationMethod::Enum::kLonger:
return Color::HueInterpolationMethod::kLonger;
case V8HueInterpolationMethod::Enum::kIncreasing:
return Color::HueInterpolationMethod::kIncreasing;
case V8HueInterpolationMethod::Enum::kDecreasing:
return Color::HueInterpolationMethod::kDecreasing;
}
return Color::HueInterpolationMethod::kShorter;
}
CanvasGradient::CanvasGradient(const gfx::PointF& p0, const gfx::PointF& p1)
: gradient_(
Gradient::CreateLinear(p0,
p1,
Gradient::SpreadMethod::kPad,
Gradient::PremultipliedAlpha::kUnpremultiplied,
Gradient::DegenerateHandling::kDisallow)) {
if (identifiability_study_helper_.ShouldUpdateBuilder()) [[unlikely]] {
identifiability_study_helper_.UpdateBuilder(
CanvasOps::kCreateLinearGradient, p0.x(), p0.y(), p1.x(), p1.y());
}
}
CanvasGradient::CanvasGradient(const gfx::PointF& p0,
float r0,
const gfx::PointF& p1,
float r1)
: gradient_(
Gradient::CreateRadial(p0,
r0,
p1,
r1,
1,
Gradient::SpreadMethod::kPad,
Gradient::PremultipliedAlpha::kUnpremultiplied,
Gradient::DegenerateHandling::kDisallow)) {
if (identifiability_study_helper_.ShouldUpdateBuilder()) [[unlikely]] {
identifiability_study_helper_.UpdateBuilder(
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 gfx::PointF& center)
: gradient_(
Gradient::CreateConic(center,
startAngle,
0,
360,
Gradient::SpreadMethod::kPad,
Gradient::PremultipliedAlpha::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 = Color::kTransparent;
if (!ParseCanvasColorString(color_string, color)) {
exception_state.ThrowDOMException(DOMExceptionCode::kSyntaxError,
"The value provided ('" + color_string +
"') could not be parsed as a color.");
return;
}
if (identifiability_study_helper_.ShouldUpdateBuilder()) [[unlikely]] {
identifiability_study_helper_.UpdateBuilder(CanvasOps::kAddColorStop, value,
color.Rgb());
}
gradient_->AddColorStop(value, color);
}
IdentifiableToken CanvasGradient::GetIdentifiableToken() const {
return identifiability_study_helper_.GetToken();
}
void CanvasGradient::SetExecutionContext(ExecutionContext* context) {
identifiability_study_helper_.SetExecutionContext(context);
}
void CanvasGradient::setColorInterpolationMethod(
const V8ColorInterpolationMethod& color_interpolation_method) {
color_interpolation_method_ = color_interpolation_method;
gradient_->SetColorInterpolationSpace(
V8ColorSpaceToColorSpace(color_interpolation_method_),
V8HueInterpolationMethodToHueInterpolationMethod(
hue_interpolation_method_));
}
void CanvasGradient::setHueInterpolationMethod(
const V8HueInterpolationMethod& hue_interpolation_method) {
hue_interpolation_method_ = hue_interpolation_method;
gradient_->SetColorInterpolationSpace(
V8ColorSpaceToColorSpace(color_interpolation_method_),
V8HueInterpolationMethodToHueInterpolationMethod(
hue_interpolation_method_));
}
void CanvasGradient::Trace(Visitor* visitor) const {
visitor->Trace(identifiability_study_helper_);
ScriptWrappable::Trace(visitor);
}
} // namespace blink
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