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// Copyright (c) 2011 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 "ui/gfx/transform.h"
#include <cmath>
#include "ui/gfx/point.h"
#include "ui/gfx/rect.h"
#include "ui/gfx/skia_util.h"
namespace ui {
Transform::Transform() {
matrix_.reset();
}
Transform::~Transform() {}
void Transform::SetRotate(float degree) {
matrix_.setRotate(SkFloatToScalar(degree));
}
void Transform::SetScaleX(float x) {
matrix_.setScaleX(SkFloatToScalar(x));
}
void Transform::SetScaleY(float y) {
matrix_.setScaleY(SkFloatToScalar(y));
}
void Transform::SetScale(float x, float y) {
matrix_.setScale(SkFloatToScalar(x), SkFloatToScalar(y));
}
void Transform::SetTranslateX(float x) {
matrix_.setTranslateX(SkFloatToScalar(x));
}
void Transform::SetTranslateY(float y) {
matrix_.setTranslateY(SkFloatToScalar(y));
}
void Transform::SetTranslate(float x, float y) {
matrix_.setTranslate(SkFloatToScalar(x), SkFloatToScalar(y));
}
void Transform::ConcatRotate(float degree) {
matrix_.postRotate(SkFloatToScalar(degree));
}
void Transform::ConcatScale(float x, float y) {
matrix_.postScale(SkFloatToScalar(x), SkFloatToScalar(y));
}
void Transform::ConcatTranslate(float x, float y) {
matrix_.postTranslate(SkFloatToScalar(x), SkFloatToScalar(y));
}
bool Transform::PreconcatTransform(const Transform& transform) {
return matrix_.setConcat(matrix_, transform.matrix_);
}
bool Transform::ConcatTransform(const Transform& transform) {
return matrix_.setConcat(transform.matrix_, matrix_);
}
bool Transform::HasChange() const {
return !matrix_.isIdentity();
}
bool Transform::TransformPoint(gfx::Point* point) {
SkPoint skp;
matrix_.mapXY(SkIntToScalar(point->x()), SkIntToScalar(point->y()), &skp);
point->SetPoint(static_cast<int>(std::floor(skp.fX)),
static_cast<int>(std::floor(skp.fY)));
return true;
}
bool Transform::TransformPointReverse(gfx::Point* point) {
SkMatrix inverse;
// TODO(sad): Try to avoid trying to invert the matrix.
if (matrix_.invert(&inverse)) {
SkPoint skp;
inverse.mapXY(SkIntToScalar(point->x()), SkIntToScalar(point->y()), &skp);
point->SetPoint(static_cast<int>(std::floor(skp.fX)),
static_cast<int>(std::floor(skp.fY)));
return true;
}
return false;
}
bool Transform::TransformRect(gfx::Rect* rect) {
SkRect src = gfx::RectToSkRect(*rect);
if (!matrix_.mapRect(&src))
return false;
*rect = gfx::SkRectToRect(src);
return true;
}
bool Transform::TransformRectReverse(gfx::Rect* rect) {
SkMatrix inverse;
if (!matrix_.invert(&inverse))
return false;
SkRect src = gfx::RectToSkRect(*rect);
if (!inverse.mapRect(&src))
return false;
*rect = gfx::SkRectToRect(src);
return true;
}
} // namespace ui
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