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/*
* Copyright (C) 2010 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.
*/
#ifndef ANDROID_HWUI_RECT_H
#define ANDROID_HWUI_RECT_H
#include <cmath>
#include <utils/Log.h>
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Structs
///////////////////////////////////////////////////////////////////////////////
class Rect {
static inline float min(float a, float b) { return (a<b) ? a : b; }
static inline float max(float a, float b) { return (a>b) ? a : b; }
Rect intersectWith(float l, float t, float r, float b) const {
Rect tmp;
tmp.left = max(left, l);
tmp.top = max(top, t);
tmp.right = min(right, r);
tmp.bottom = min(bottom, b);
return tmp;
}
public:
float left;
float top;
float right;
float bottom;
// Used by Region
typedef float value_type;
// we don't provide copy-ctor and operator= on purpose
// because we want the compiler generated versions
inline Rect():
left(0),
top(0),
right(0),
bottom(0) {
}
inline Rect(float left, float top, float right, float bottom):
left(left),
top(top),
right(right),
bottom(bottom) {
}
inline Rect(float width, float height):
left(0.0f),
top(0.0f),
right(width),
bottom(height) {
}
friend int operator==(const Rect& a, const Rect& b) {
return !memcmp(&a, &b, sizeof(a));
}
friend int operator!=(const Rect& a, const Rect& b) {
return memcmp(&a, &b, sizeof(a));
}
inline void clear() {
left = top = right = bottom = 0.0f;
}
inline bool isEmpty() const {
// this is written in such way this it'll handle NANs to return
// true (empty)
return !((left < right) && (top < bottom));
}
inline void setEmpty() {
left = top = right = bottom = 0.0f;
}
inline void set(float left, float top, float right, float bottom) {
this->left = left;
this->right = right;
this->top = top;
this->bottom = bottom;
}
inline void set(const Rect& r) {
set(r.left, r.top, r.right, r.bottom);
}
inline float getWidth() const {
return right - left;
}
inline float getHeight() const {
return bottom - top;
}
bool intersects(float l, float t, float r, float b) const {
return !intersectWith(l,t,r,b).isEmpty();
}
bool intersects(const Rect& r) const {
return intersects(r.left, r.top, r.right, r.bottom);
}
bool intersect(float l, float t, float r, float b) {
Rect tmp(intersectWith(l,t,r,b));
if (!tmp.isEmpty()) {
set(tmp);
return true;
}
return false;
}
bool intersect(const Rect& r) {
return intersect(r.left, r.top, r.right, r.bottom);
}
bool unionWith(const Rect& r) {
if (r.left < r.right && r.top < r.bottom) {
if (left < right && top < bottom) {
if (left > r.left) left = r.left;
if (top > r.top) top = r.top;
if (right < r.right) right = r.right;
if (bottom < r.bottom) bottom = r.bottom;
return true;
} else {
left = r.left;
top = r.top;
right = r.right;
bottom = r.bottom;
return true;
}
}
return false;
}
void translate(float dx, float dy) {
left += dx;
right += dx;
top += dy;
bottom += dy;
}
void snapToPixelBoundaries() {
left = floorf(left + 0.5f);
top = floorf(top + 0.5f);
right = floorf(right + 0.5f);
bottom = floorf(bottom + 0.5f);
}
void dump() const {
LOGD("Rect[l=%f t=%f r=%f b=%f]", left, top, right, bottom);
}
}; // class Rect
}; // namespace uirenderer
}; // namespace android
#endif // ANDROID_HWUI_RECT_H