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authorDavid Plowman <david.plowman@raspberrypi.com>2020-10-26 17:19:06 +0000
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2020-10-27 00:51:59 +0200
commit63624bc85a5f765dc3899d4b3b72ad875894ca04 (patch)
tree49d56f3e509bd5608fcc3ae3c7b7c4e8fa3d197e /include
parenta16edeb3848c6e6693bfaa24c5eb1744c5d9c445 (diff)
libcamera: Add geometry helper functions
These functions are aimed at making it easier to calculate cropping rectangles, particularly in order to implement digital zoom. Signed-off-by: David Plowman <david.plowman@raspberrypi.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'include')
-rw-r--r--include/libcamera/geometry.h68
1 files changed, 68 insertions, 0 deletions
diff --git a/include/libcamera/geometry.h b/include/libcamera/geometry.h
index 02fb63c0..2f3a82e2 100644
--- a/include/libcamera/geometry.h
+++ b/include/libcamera/geometry.h
@@ -13,6 +13,38 @@
namespace libcamera {
+class Rectangle;
+
+class Point
+{
+public:
+ constexpr Point()
+ : x(0), y(0)
+ {
+ }
+
+ constexpr Point(int xpos, int ypos)
+ : x(xpos), y(ypos)
+ {
+ }
+
+ int x;
+ int y;
+
+ const std::string toString() const;
+
+ constexpr Point operator-() const
+ {
+ return { -x, -y };
+ }
+};
+
+bool operator==(const Point &lhs, const Point &rhs);
+static inline bool operator!=(const Point &lhs, const Point &rhs)
+{
+ return !(lhs == rhs);
+}
+
class Size
{
public:
@@ -93,6 +125,17 @@ public:
std::max(height, expand.height)
};
}
+
+ Size boundedToAspectRatio(const Size &ratio) const;
+ Size expandedToAspectRatio(const Size &ratio) const;
+
+ Rectangle centeredTo(const Point &center) const;
+
+ Size operator*(float factor) const;
+ Size operator/(float factor) const;
+
+ Size &operator*=(float factor);
+ Size &operator/=(float factor);
};
bool operator==(const Size &lhs, const Size &rhs);
@@ -176,6 +219,11 @@ public:
{
}
+ constexpr explicit Rectangle(const Size &size)
+ : x(0), y(0), width(size.width), height(size.height)
+ {
+ }
+
int x;
int y;
unsigned int width;
@@ -183,6 +231,26 @@ public:
bool isNull() const { return !width && !height; }
const std::string toString() const;
+
+ Point center() const;
+
+ Size size() const
+ {
+ return { width, height };
+ }
+
+ Point topLeft() const
+ {
+ return { x, y };
+ }
+
+ Rectangle &scaleBy(const Size &numerator, const Size &denominator);
+ Rectangle &translateBy(const Point &point);
+
+ Rectangle boundedTo(const Rectangle &bound) const;
+ Rectangle enclosedIn(const Rectangle &boundary) const;
+ Rectangle scaledBy(const Size &numerator, const Size &denominator) const;
+ Rectangle translatedBy(const Point &point) const;
};
bool operator==(const Rectangle &lhs, const Rectangle &rhs);