| /* |
| * 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 { |
| ALOGD("Rect[l=%f t=%f r=%f b=%f]", left, top, right, bottom); |
| } |
| |
| }; // class Rect |
| |
| }; // namespace uirenderer |
| }; // namespace android |
| |
| #endif // ANDROID_HWUI_RECT_H |