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core: Document what each OutputTransform does

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Flipped transforms are very confusing because the order of mirroring and
rotatation transforms matters in some cases.
This commit is contained in:
Vlad Zahorodnii 2023-12-15 11:39:22 +02:00
parent 08d2ec835d
commit c5124a1daf
1 changed files with 8 additions and 9 deletions
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17
src/core/output.h
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@ -40,20 +40,19 @@ enum class ContentType {
/**
* The OutputTransform type is used to describe the transform applied to the output content.
* Rotation is clockwise.
*/
class KWIN_EXPORT OutputTransform
{
public:
enum Kind {
Normal,
Rotated90,
Rotated180,
Rotated270,
Flipped,
Flipped90,
Flipped180,
Flipped270
Normal, // no rotation
Rotated90, // rotate 90 degrees clockwise
Rotated180, // rotate 180 degrees clockwise
Rotated270, // rotate 270 degrees clockwise
Flipped, // mirror horizontally
Flipped90, // rotate 90 degrees clockwise, then mirror horizontally
Flipped180, // rotate 180 degrees clockwise, then mirror horizontally
Flipped270, // rotate 270 degrees clockwise, then mirror horizontally
};
OutputTransform() = default;