165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn/* 265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * Copyright (C) 2011 The Android Open Source Project 365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * 465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * Licensed under the Apache License, Version 2.0 (the "License"); 565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * you may not use this file except in compliance with the License. 665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * You may obtain a copy of the License at 765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * 865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * http://www.apache.org/licenses/LICENSE-2.0 965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * 1065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * Unless required by applicable law or agreed to in writing, software 1165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * distributed under the License is distributed on an "AS IS" BASIS, 1265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * See the License for the specific language governing permissions and 1465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * limitations under the License. 1565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn */ 1665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 1765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn#include "core/geometry.h" 1865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 1965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn#include <cmath> 2065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 2165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn#include "base/logging.h" 2265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 2365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennnamespace android { 2465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennnamespace filterfw { 2565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 2665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennfloat Point::Length() const { 2765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return std::sqrt(x_ * x_ + y_ * y_); 2865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn} 2965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 3065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennbool Point::ScaleTo(float new_length) { 3165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn float length = Length(); 3265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn if (length == 0.0f) { 3365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return false; 3465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 3565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn x_ *= new_length / length; 3665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn y_ *= new_length / length; 3765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return true; 3865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn} 3965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 4065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennfloat Point::Distance(const Point& p0, const Point& p1) { 4165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn Point diff = p1 - p0; 4265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return diff.Length(); 4365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn} 4465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 4565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius RennPoint Point::operator+(const Point& other) const { 4665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn Point out; 4765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn out.x_ = x_ + other.x_; 4865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn out.y_ = y_ + other.y_; 4965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return out; 5065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn} 5165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 5265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius RennPoint Point::operator-(const Point& other) const { 5365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn Point out; 5465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn out.x_ = x_ - other.x_; 5565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn out.y_ = y_ - other.y_; 5665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return out; 5765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn} 5865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 5965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius RennPoint Point::operator*(float factor) const { 6065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn Point out; 6165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn out.x_ = factor * x_; 6265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn out.y_ = factor * y_; 6365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return out; 6465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn} 6565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 6665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennvoid Point::Rotate90Clockwise() { 6765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn const float x = x_; 6865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn x_ = y_; 6965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn y_ = -x; 7065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn} 7165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 7265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennbool Rect::ExpandToAspectRatio(float ratio) { 7365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn if (width <= 0.0f || height <= 0.0f || ratio <= 0.0f) { 7465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return false; 7565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 7665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 7765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn const float current_ratio = width / height; 7865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn if (current_ratio < ratio) { 7965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn const float dx = width * (ratio / current_ratio - 1.0f); 8065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn x -= dx / 2.0f; 8165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn width += dx; 8265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } else { 8365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn const float dy = height * (current_ratio / ratio - 1.0f); 8465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn y -= dy / 2.0f; 8565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn height += dy; 8665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 8765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return true; 8865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn} 8965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 9065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennbool Rect::ExpandToMinLength(float length) { 9165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn if (width <= 0.0f || height <= 0.0f || length <= 0.0f) { 9265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return false; 9365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 9465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 9565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn const float current_length = width > height ? width : height; 9665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn if (length > current_length) { 9765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn const float dx = width * (length / current_length - 1.0f); 9865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn x -= dx / 2.0f; 9965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn width += dx; 10065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn const float dy = height * (length / current_length - 1.0f); 10165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn y -= dy / 2.0f; 10265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn height += dy; 10365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 10465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return true; 10565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn} 10665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 10765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennbool Rect::ScaleWithLengthLimit(float factor, float max_length) { 10865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn if (width <= 0.0f || height <= 0.0f || factor <= 0.0f) { 10965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return false; 11065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 11165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 11265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn const float current_length = width > height ? width : height; 11365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn if (current_length >= max_length) { 11465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return true; 11565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 11665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 11765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn float f = factor; 11865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn if (current_length * f > max_length) { 11965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn f *= max_length / (current_length * f); 12065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 12165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 12265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn const float dx = width * (f - 1.0f); 12365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn x -= dx / 2.0f; 12465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn width += dx; 12565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn const float dy = height * (f - 1.0f); 12665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn y -= dy / 2.0f; 12765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn height += dy; 12865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return true; 12965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn} 13065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 13165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennconst Point& Quad::point(int ix) const { 13265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn ALOG_ASSERT(ix < static_cast<int>(points_.size()), "Access out of bounds"); 13365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return points_[ix]; 13465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn} 13565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 13665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn} // namespace filterfw 13765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn} // namespace android 138