GI.GstVideo.Structs.VideoAffineTransformationMeta

Extra buffer metadata for performing an affine transformation using a 4x4 matrix. The transformation matrix can be composed with videoAffineTransformationMetaApplyMatrix.

The vertices operated on are all in the range 0 to 1, not in Normalized Device Coordinates (-1 to +1). Transforming points in this space are assumed to have an origin at (0.5, 0.5, 0.5) in a left-handed coordinate system with the x-axis moving horizontally (positive values to the right), the y-axis moving vertically (positive values up the screen) and the z-axis perpendicular to the screen (positive values into the screen).

Since: 1.8

Exported types

newtype VideoAffineTransformationMeta

Memory-managed wrapper type.

Constructors

VideoAffineTransformationMeta (ManagedPtr VideoAffineTransformationMeta)

Instances

Eq VideoAffineTransformationMeta

Defined in GI.GstVideo.Structs.VideoAffineTransformationMeta

Methods

(==) :: VideoAffineTransformationMeta -> VideoAffineTransformationMeta -> Bool

(/=) :: VideoAffineTransformationMeta -> VideoAffineTransformationMeta -> Bool

BoxedPtr VideoAffineTransformationMeta

Defined in GI.GstVideo.Structs.VideoAffineTransformationMeta

Methods

boxedPtrCopy :: VideoAffineTransformationMeta -> IO VideoAffineTransformationMeta

boxedPtrFree :: VideoAffineTransformationMeta -> IO ()

CallocPtr VideoAffineTransformationMeta

Defined in GI.GstVideo.Structs.VideoAffineTransformationMeta

Methods

boxedPtrCalloc :: IO (Ptr VideoAffineTransformationMeta)

ManagedPtrNewtype VideoAffineTransformationMeta

Defined in GI.GstVideo.Structs.VideoAffineTransformationMeta

Methods

toManagedPtr :: VideoAffineTransformationMeta -> ManagedPtr VideoAffineTransformationMeta

tag ~ 'AttrSet => Constructible VideoAffineTransformationMeta tag

Defined in GI.GstVideo.Structs.VideoAffineTransformationMeta

Methods

new :: MonadIO m => (ManagedPtr VideoAffineTransformationMeta -> VideoAffineTransformationMeta) -> [AttrOp VideoAffineTransformationMeta tag] -> m VideoAffineTransformationMeta

newZeroVideoAffineTransformationMeta :: MonadIO m => m VideoAffineTransformationMeta

Construct a VideoAffineTransformationMeta struct initialized to zero.

Methods

Click to display all available methods, including inherited ones

Methods

applyMatrix.

Getters

None.

Setters

None.

applyMatrix

videoAffineTransformationMetaApplyMatrix

Arguments

:: (HasCallStack, MonadIO m)

=> VideoAffineTransformationMeta

meta: a VideoAffineTransformationMeta

-> [Float]

matrix: a 4x4 transformation matrix to be applied

-> m ()

Apply a transformation using the given 4x4 transformation matrix. Performs the multiplication, meta->matrix X matrix.

Since: 1.8

getInfo

videoAffineTransformationMetaGetInfo :: (HasCallStack, MonadIO m) => m MetaInfo

No description available in the introspection data.

Properties

meta

parent Meta

getVideoAffineTransformationMetaMeta :: MonadIO m => VideoAffineTransformationMeta -> m Meta

Get the value of the “meta” field. When overloading is enabled, this is equivalent to

get videoAffineTransformationMeta #meta