MFVideoNormalizedRect structure (mfcaptureengine.h)

Defines a normalized rectangle, which is used to specify sub-rectangles in a video rectangle. When a rectangle N is normalized relative to some other rectangle R, it means the following:

• The coordinate (0.0, 0.0) on N is mapped to the upper-left corner of R.
• The coordinate (1.0, 1.0) on N is mapped to the lower-right corner of R.

Any coordinates of N that fall outside the range [0...1] are mapped to positions outside the rectangle R. A normalized rectangle can be used to specify a region within a video rectangle without knowing the resolution or even the aspect ratio of the video. For example, the upper-left quadrant is defined as {0.0, 0.0, 0.5, 0.5}.

Syntax

typedef struct MFVideoNormalizedRect {
  float left;
  float top;
  float right;
  float bottom;
} MFVideoNormalizedRect;

Members

left

X-coordinate of the upper-left corner of the rectangle.

top

Y-coordinate of the upper-left corner of the rectangle.

right

X-coordinate of the lower-right corner of the rectangle.

bottom

Y-coordinate of the lower-right corner of the rectangle.

Requirements

Requirement	Value
Minimum supported client	Windows Vista [desktop apps | UWP apps]
Minimum supported server	Windows Server 2008 [desktop apps | UWP apps]
Header	mfcaptureengine.h (include Mfcaptureengine.h, Mfmediaengine.h)

See also

Media Foundation Structures