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libcamera: geometry: Add Rectangle::transformedBetween()

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Handling cropping and scaling within a complicated pipeline involves
transformations of rectangles between different coordinate systems. For
example the full input of the dewarper (0,0)/1920x1080 might correspond
to the rectangle (0, 243)/2592x1458 in sensor coordinates (of a
2592x1944 sensor). Add a function that allows the transformation of a
rectangle defined in one reference frame (dewarper) into the coordinates
of a second reference frame (sensor).

Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
This commit is contained in:
Stefan Klug 2024-12-16 16:40:43 +01:00
parent db9b6f8e23
commit ec097d63ef
3 changed files with 63 additions and 0 deletions
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11
test/geometry.cpp
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@ -495,6 +495,17 @@ protected:
return TestFail;
}
Rectangle f1 = Rectangle(100, 200, 3000, 2000);
Rectangle f2 = Rectangle(200, 300, 1500, 1000);
/* Bottom right quarter of the corresponding frames. */
Rectangle r1 = Rectangle(100 + 1500, 200 + 1000, 1500, 1000);
Rectangle r2 = Rectangle(200 + 750, 300 + 500, 750, 500);
if (r1.transformedBetween(f1, f2) != r2 ||
r2.transformedBetween(f2, f1) != r1) {
cout << "Rectangle::transformedBetween() test failed" << endl;
return TestFail;
}
return TestPass;
}
};