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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 #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_