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/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <ui/Region.h>
#include <private/pixelflinger/ggl_fixed.h>
#include "Transform.h"
// ---------------------------------------------------------------------------
#define LIKELY( exp ) (__builtin_expect( (exp) != 0, true ))
#define UNLIKELY( exp ) (__builtin_expect( (exp) != 0, false ))
// ---------------------------------------------------------------------------
namespace android {
// ---------------------------------------------------------------------------
Transform::Transform()
: mType(0)
{
mTransform.reset();
}
Transform::Transform(const Transform& other)
: mTransform(other.mTransform), mType(other.mType)
{
}
Transform::~Transform() {
}
Transform Transform::operator * (const Transform& rhs) const
{
if (LIKELY(mType == 0))
return rhs;
Transform r(*this);
r.mTransform.preConcat(rhs.mTransform);
r.mType |= rhs.mType;
return r;
}
float Transform::operator [] (int i) const
{
float r = 0;
switch(i) {
case 0: r = SkScalarToFloat( mTransform[SkMatrix::kMScaleX] ); break;
case 1: r = SkScalarToFloat( mTransform[SkMatrix::kMSkewX] ); break;
case 2: r = SkScalarToFloat( mTransform[SkMatrix::kMSkewY] ); break;
case 3: r = SkScalarToFloat( mTransform[SkMatrix::kMScaleY] ); break;
}
return r;
}
uint8_t Transform::type() const
{
if (UNLIKELY(mType & 0x80000000)) {
mType = mTransform.getType();
}
return uint8_t(mType & 0xFF);
}
bool Transform::transformed() const {
return type() > SkMatrix::kTranslate_Mask;
}
int Transform::tx() const {
return SkScalarRound( mTransform[SkMatrix::kMTransX] );
}
int Transform::ty() const {
return SkScalarRound( mTransform[SkMatrix::kMTransY] );
}
void Transform::reset() {
mTransform.reset();
mType = 0;
}
void Transform::set( float xx, float xy,
float yx, float yy)
{
mTransform.set(SkMatrix::kMScaleX, SkFloatToScalar(xx));
mTransform.set(SkMatrix::kMSkewX, SkFloatToScalar(xy));
mTransform.set(SkMatrix::kMSkewY, SkFloatToScalar(yx));
mTransform.set(SkMatrix::kMScaleY, SkFloatToScalar(yy));
mType |= 0x80000000;
}
void Transform::set(int tx, int ty)
{
if (tx | ty) {
mTransform.set(SkMatrix::kMTransX, SkIntToScalar(tx));
mTransform.set(SkMatrix::kMTransY, SkIntToScalar(ty));
mType |= SkMatrix::kTranslate_Mask;
} else {
mTransform.set(SkMatrix::kMTransX, 0);
mTransform.set(SkMatrix::kMTransY, 0);
mType &= ~SkMatrix::kTranslate_Mask;
}
}
void Transform::transform(GLfixed* point, int x, int y) const
{
SkPoint s;
mTransform.mapXY(SkIntToScalar(x), SkIntToScalar(y), &s);
point[0] = SkScalarToFixed(s.fX);
point[1] = SkScalarToFixed(s.fY);
}
Rect Transform::makeBounds(int w, int h) const
{
Rect r;
SkRect d, s;
s.set(0, 0, SkIntToScalar(w), SkIntToScalar(h));
mTransform.mapRect(&d, s);
r.left = SkScalarRound( d.fLeft );
r.top = SkScalarRound( d.fTop );
r.right = SkScalarRound( d.fRight );
r.bottom = SkScalarRound( d.fBottom );
return r;
}
Rect Transform::transform(const Rect& bounds) const
{
Rect r;
SkRect d, s;
s.set( SkIntToScalar( bounds.left ),
SkIntToScalar( bounds.top ),
SkIntToScalar( bounds.right ),
SkIntToScalar( bounds.bottom ));
mTransform.mapRect(&d, s);
r.left = SkScalarRound( d.fLeft );
r.top = SkScalarRound( d.fTop );
r.right = SkScalarRound( d.fRight );
r.bottom = SkScalarRound( d.fBottom );
return r;
}
Region Transform::transform(const Region& reg) const
{
Region out;
if (UNLIKELY(transformed())) {
if (LIKELY(preserveRects())) {
Rect r;
Region::iterator iterator(reg);
while (iterator.iterate(&r)) {
out.orSelf(transform(r));
}
} else {
out.set(transform(reg.bounds()));
}
} else {
out = reg.translate(tx(), ty());
}
return out;
}
int32_t Transform::getOrientation() const
{
uint32_t flags = 0;
if (UNLIKELY(transformed())) {
SkScalar a = mTransform[SkMatrix::kMScaleX];
SkScalar b = mTransform[SkMatrix::kMSkewX];
SkScalar c = mTransform[SkMatrix::kMSkewY];
SkScalar d = mTransform[SkMatrix::kMScaleY];
if (b==0 && c==0 && a && d) {
if (a<0) flags |= FLIP_H;
if (d<0) flags |= FLIP_V;
} else if (b && c && a==0 && d==0) {
flags |= ROT_90;
if (b>0) flags |= FLIP_H;
if (c<0) flags |= FLIP_V;
} else {
flags = 0x80000000;
}
}
return flags;
}
bool Transform::preserveRects() const
{
return mTransform.rectStaysRect();
}
// ---------------------------------------------------------------------------
}; // namespace android
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