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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_skia.h"
#include "third_party/skia/include/core/SkMatrix.h"
#include "ui/gfx/canvas_skia.h"
#include "ui/gfx/point.h"
#include "ui/gfx/rect.h"
#include "ui/gfx/skia_util.h"
namespace ui {
// static
Transform* Transform::Create() {
return new TransformSkia();
}
TransformSkia::TransformSkia() {
matrix_.reset(new SkMatrix);
matrix_->reset();
}
TransformSkia::~TransformSkia() {}
void TransformSkia::SetRotate(float degree) {
matrix_->setRotate(SkFloatToScalar(degree));
}
void TransformSkia::SetScaleX(float x) {
matrix_->setScaleX(SkFloatToScalar(x));
}
void TransformSkia::SetScaleY(float y) {
matrix_->setScaleY(SkFloatToScalar(y));
}
void TransformSkia::SetScale(float x, float y) {
matrix_->setScale(SkFloatToScalar(x), SkFloatToScalar(y));
}
void TransformSkia::SetTranslateX(float x) {
matrix_->setTranslateX(SkFloatToScalar(x));
}
void TransformSkia::SetTranslateY(float y) {
matrix_->setTranslateY(SkFloatToScalar(y));
}
void TransformSkia::SetTranslate(float x, float y) {
matrix_->setTranslate(SkFloatToScalar(x), SkFloatToScalar(y));
}
void TransformSkia::ConcatRotate(float degree) {
matrix_->postRotate(SkFloatToScalar(degree));
}
void TransformSkia::ConcatScale(float x, float y) {
matrix_->postScale(SkFloatToScalar(x), SkFloatToScalar(y));
}
void TransformSkia::ConcatTranslate(float x, float y) {
matrix_->postTranslate(SkFloatToScalar(x), SkFloatToScalar(y));
}
bool TransformSkia::ConcatTransform(const Transform& transform) {
return matrix_->setConcat(*reinterpret_cast<const TransformSkia&>
(transform).matrix_.get(), *matrix_.get());
}
bool TransformSkia::HasChange() const {
return !matrix_->isIdentity();
}
bool TransformSkia::TransformPoint(gfx::Point* point) {
SkPoint skp;
matrix_->mapXY(SkIntToScalar(point->x()), SkIntToScalar(point->y()), &skp);
point->SetPoint(static_cast<int>(skp.fX), static_cast<int>(skp.fY));
return true;
}
bool TransformSkia::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>(skp.fX), static_cast<int>(skp.fY));
return true;
}
return false;
}
bool TransformSkia::TransformRect(gfx::Rect* rect) {
SkRect src = gfx::RectToSkRect(*rect);
if (!matrix_->mapRect(&src))
return false;
gfx::Rect xrect = gfx::SkRectToRect(src);
rect->SetRect(xrect.x(), xrect.y(), xrect.width(), xrect.height());
return true;
}
} // namespace ui
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