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/*
* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef MODULES_DESKTOP_CAPTURE_DESKTOP_GEOMETRY_H_
#define MODULES_DESKTOP_CAPTURE_DESKTOP_GEOMETRY_H_
#include <stdint.h>
#include "rtc_base/system/rtc_export.h"
namespace webrtc {
// A vector in the 2D integer space. E.g. can be used to represent screen DPI.
class DesktopVector {
public:
DesktopVector() : x_(0), y_(0) {}
DesktopVector(int32_t x, int32_t y) : x_(x), y_(y) {}
int32_t x() const { return x_; }
int32_t y() const { return y_; }
bool is_zero() const { return x_ == 0 && y_ == 0; }
bool equals(const DesktopVector& other) const {
return x_ == other.x_ && y_ == other.y_;
}
void set(int32_t x, int32_t y) {
x_ = x;
y_ = y;
}
DesktopVector add(const DesktopVector& other) const {
return DesktopVector(x() + other.x(), y() + other.y());
}
DesktopVector subtract(const DesktopVector& other) const {
return DesktopVector(x() - other.x(), y() - other.y());
}
DesktopVector operator-() const { return DesktopVector(-x_, -y_); }
private:
int32_t x_;
int32_t y_;
};
// Type used to represent screen/window size.
class DesktopSize {
public:
DesktopSize() : width_(0), height_(0) {}
DesktopSize(int32_t width, int32_t height) : width_(width), height_(height) {}
int32_t width() const { return width_; }
int32_t height() const { return height_; }
bool is_empty() const { return width_ <= 0 || height_ <= 0; }
bool equals(const DesktopSize& other) const {
return width_ == other.width_ && height_ == other.height_;
}
void set(int32_t width, int32_t height) {
width_ = width;
height_ = height;
}
private:
int32_t width_;
int32_t height_;
};
// Represents a rectangle on the screen.
class RTC_EXPORT DesktopRect {
public:
static DesktopRect MakeSize(const DesktopSize& size) {
return DesktopRect(0, 0, size.width(), size.height());
}
static DesktopRect MakeWH(int32_t width, int32_t height) {
return DesktopRect(0, 0, width, height);
}
static DesktopRect MakeXYWH(int32_t x,
int32_t y,
int32_t width,
int32_t height) {
return DesktopRect(x, y, x + width, y + height);
}
static DesktopRect MakeLTRB(int32_t left,
int32_t top,
int32_t right,
int32_t bottom) {
return DesktopRect(left, top, right, bottom);
}
static DesktopRect MakeOriginSize(const DesktopVector& origin,
const DesktopSize& size) {
return MakeXYWH(origin.x(), origin.y(), size.width(), size.height());
}
DesktopRect() : left_(0), top_(0), right_(0), bottom_(0) {}
int32_t left() const { return left_; }
int32_t top() const { return top_; }
int32_t right() const { return right_; }
int32_t bottom() const { return bottom_; }
int32_t width() const { return right_ - left_; }
int32_t height() const { return bottom_ - top_; }
void set_width(int32_t width) { right_ = left_ + width; }
void set_height(int32_t height) { bottom_ = top_ + height; }
DesktopVector top_left() const { return DesktopVector(left_, top_); }
DesktopSize size() const { return DesktopSize(width(), height()); }
bool is_empty() const { return left_ >= right_ || top_ >= bottom_; }
bool equals(const DesktopRect& other) const {
return left_ == other.left_ && top_ == other.top_ &&
right_ == other.right_ && bottom_ == other.bottom_;
}
// Returns true if `point` lies within the rectangle boundaries.
bool Contains(const DesktopVector& point) const;
// Returns true if `rect` lies within the boundaries of this rectangle.
bool ContainsRect(const DesktopRect& rect) const;
// Finds intersection with `rect`.
void IntersectWith(const DesktopRect& rect);
// Extends the rectangle to cover `rect`. If `this` is empty, replaces `this`
// with `rect`; if `rect` is empty, this function takes no effect.
void UnionWith(const DesktopRect& rect);
// Adds (dx, dy) to the position of the rectangle.
void Translate(int32_t dx, int32_t dy);
void Translate(DesktopVector d) { Translate(d.x(), d.y()); }
// Enlarges current DesktopRect by subtracting `left_offset` and `top_offset`
// from `left_` and `top_`, and adding `right_offset` and `bottom_offset` to
// `right_` and `bottom_`. This function does not normalize the result, so
// `left_` and `top_` may be less than zero or larger than `right_` and
// `bottom_`.
void Extend(int32_t left_offset,
int32_t top_offset,
int32_t right_offset,
int32_t bottom_offset);
// Scales current DesktopRect. This function does not impact the `top_` and
// `left_`.
void Scale(double horizontal, double vertical);
private:
DesktopRect(int32_t left, int32_t top, int32_t right, int32_t bottom)
: left_(left), top_(top), right_(right), bottom_(bottom) {}
int32_t left_;
int32_t top_;
int32_t right_;
int32_t bottom_;
};
} // namespace webrtc
#endif // MODULES_DESKTOP_CAPTURE_DESKTOP_GEOMETRY_H_
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