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/*
* Copyright (C) 2004, 2005 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "third_party/blink/renderer/core/svg/svg_transform.h"
#include "base/stl_util.h"
#include "third_party/blink/renderer/platform/geometry/float_size.h"
#include "third_party/blink/renderer/platform/wtf/math_extras.h"
#include "third_party/blink/renderer/platform/wtf/text/string_builder.h"
namespace blink {
SVGTransform::SVGTransform()
: transform_type_(kSvgTransformUnknown), angle_(0) {}
SVGTransform::SVGTransform(SVGTransformType transform_type,
ConstructionMode mode)
: transform_type_(transform_type), angle_(0) {
if (mode == kConstructZeroTransform)
matrix_ = AffineTransform(0, 0, 0, 0, 0, 0);
}
SVGTransform::SVGTransform(const AffineTransform& matrix)
: transform_type_(kSvgTransformMatrix), angle_(0), matrix_(matrix) {}
SVGTransform::SVGTransform(SVGTransformType transform_type,
float angle,
const FloatPoint& center,
const AffineTransform& matrix)
: transform_type_(transform_type),
angle_(angle),
center_(center),
matrix_(matrix) {}
SVGTransform::~SVGTransform() = default;
SVGTransform* SVGTransform::Clone() const {
return MakeGarbageCollected<SVGTransform>(transform_type_, angle_, center_,
matrix_);
}
SVGPropertyBase* SVGTransform::CloneForAnimation(const String&) const {
// SVGTransform is never animated.
NOTREACHED();
return nullptr;
}
void SVGTransform::SetMatrix(const AffineTransform& matrix) {
OnMatrixChange();
matrix_ = matrix;
}
void SVGTransform::OnMatrixChange() {
transform_type_ = kSvgTransformMatrix;
angle_ = 0;
}
void SVGTransform::SetTranslate(float tx, float ty) {
transform_type_ = kSvgTransformTranslate;
angle_ = 0;
matrix_.MakeIdentity();
matrix_.Translate(tx, ty);
}
FloatPoint SVGTransform::Translate() const {
return FloatPoint::NarrowPrecision(matrix_.E(), matrix_.F());
}
void SVGTransform::SetScale(float sx, float sy) {
transform_type_ = kSvgTransformScale;
angle_ = 0;
center_ = FloatPoint();
matrix_.MakeIdentity();
matrix_.ScaleNonUniform(sx, sy);
}
FloatSize SVGTransform::Scale() const {
return FloatSize::NarrowPrecision(matrix_.A(), matrix_.D());
}
void SVGTransform::SetRotate(float angle, float cx, float cy) {
transform_type_ = kSvgTransformRotate;
angle_ = angle;
center_ = FloatPoint(cx, cy);
// TODO: toString() implementation, which can show cx, cy (need to be stored?)
matrix_.MakeIdentity();
matrix_.Translate(cx, cy);
matrix_.Rotate(angle);
matrix_.Translate(-cx, -cy);
}
void SVGTransform::SetSkewX(float angle) {
transform_type_ = kSvgTransformSkewx;
angle_ = angle;
matrix_.MakeIdentity();
matrix_.SkewX(angle);
}
void SVGTransform::SetSkewY(float angle) {
transform_type_ = kSvgTransformSkewy;
angle_ = angle;
matrix_.MakeIdentity();
matrix_.SkewY(angle);
}
namespace {
const char* TransformTypePrefixForParsing(SVGTransformType type) {
switch (type) {
case kSvgTransformUnknown:
return "";
case kSvgTransformMatrix:
return "matrix(";
case kSvgTransformTranslate:
return "translate(";
case kSvgTransformScale:
return "scale(";
case kSvgTransformRotate:
return "rotate(";
case kSvgTransformSkewx:
return "skewX(";
case kSvgTransformSkewy:
return "skewY(";
}
NOTREACHED();
return "";
}
} // namespace
String SVGTransform::ValueAsString() const {
double arguments[6];
size_t argument_count = 0;
switch (transform_type_) {
case kSvgTransformUnknown:
return g_empty_string;
case kSvgTransformMatrix: {
arguments[argument_count++] = matrix_.A();
arguments[argument_count++] = matrix_.B();
arguments[argument_count++] = matrix_.C();
arguments[argument_count++] = matrix_.D();
arguments[argument_count++] = matrix_.E();
arguments[argument_count++] = matrix_.F();
break;
}
case kSvgTransformTranslate: {
arguments[argument_count++] = matrix_.E();
arguments[argument_count++] = matrix_.F();
break;
}
case kSvgTransformScale: {
arguments[argument_count++] = matrix_.A();
arguments[argument_count++] = matrix_.D();
break;
}
case kSvgTransformRotate: {
arguments[argument_count++] = angle_;
double angle_in_rad = deg2rad(angle_);
double cos_angle = cos(angle_in_rad);
double sin_angle = sin(angle_in_rad);
float cx = clampTo<float>(
cos_angle != 1
? (matrix_.E() * (1 - cos_angle) - matrix_.F() * sin_angle) /
(1 - cos_angle) / 2
: 0);
float cy = clampTo<float>(
cos_angle != 1
? (matrix_.E() * sin_angle / (1 - cos_angle) + matrix_.F()) / 2
: 0);
if (cx || cy) {
arguments[argument_count++] = cx;
arguments[argument_count++] = cy;
}
break;
}
case kSvgTransformSkewx:
arguments[argument_count++] = angle_;
break;
case kSvgTransformSkewy:
arguments[argument_count++] = angle_;
break;
}
DCHECK_LE(argument_count, base::size(arguments));
StringBuilder builder;
builder.Append(TransformTypePrefixForParsing(transform_type_));
for (size_t i = 0; i < argument_count; ++i) {
if (i)
builder.Append(' ');
builder.AppendNumber(arguments[i]);
}
builder.Append(')');
return builder.ToString();
}
void SVGTransform::Add(SVGPropertyBase*, SVGElement*) {
// SVGTransform is not animated by itself.
NOTREACHED();
}
void SVGTransform::CalculateAnimatedValue(SVGAnimationElement*,
float,
unsigned,
SVGPropertyBase*,
SVGPropertyBase*,
SVGPropertyBase*,
SVGElement*) {
// SVGTransform is not animated by itself.
NOTREACHED();
}
float SVGTransform::CalculateDistance(SVGPropertyBase*, SVGElement*) {
// SVGTransform is not animated by itself.
NOTREACHED();
return -1;
}
} // namespace blink
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