Interface GlMatrixTransformation
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- All Known Subinterfaces:
MatrixTransformation
- All Known Implementing Classes:
Crop
,Presentation
,ScaleToFitTransformation
public interface GlMatrixTransformation extends GlEffect
Specifies a 4x4 transformationMatrix
to apply in the vertex shader for each frame.The matrix is applied to points given in normalized device coordinates (-1 to 1 on x, y, and z axes). Transformed pixels that are moved outside of the normal device coordinate range are clipped.
Output frame pixels outside of the transformed input frame will be black, with alpha = 0 if applicable.
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Method Summary
All Methods Instance Methods Abstract Methods Default Methods Modifier and Type Method Description default Pair<Integer,Integer>
configure(int inputWidth, int inputHeight)
Configures the input and output dimensions.float[]
getGlMatrixArray(long presentationTimeUs)
Returns the 4x4 transformationMatrix
to apply to the frame with the given timestamp.default SingleFrameGlTextureProcessor
toGlTextureProcessor(Context context, boolean useHdr)
Returns aSingleFrameGlTextureProcessor
that applies the effect.
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Method Detail
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configure
default Pair<Integer,Integer> configure(int inputWidth, int inputHeight)
Configures the input and output dimensions.Must be called before
getGlMatrixArray(long)
.- Parameters:
inputWidth
- The input frame width, in pixels.inputHeight
- The input frame height, in pixels.- Returns:
- The output frame width and height, in pixels.
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getGlMatrixArray
float[] getGlMatrixArray(long presentationTimeUs)
Returns the 4x4 transformationMatrix
to apply to the frame with the given timestamp.
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toGlTextureProcessor
default SingleFrameGlTextureProcessor toGlTextureProcessor(Context context, boolean useHdr) throws FrameProcessingException
Description copied from interface:GlEffect
Returns aSingleFrameGlTextureProcessor
that applies the effect.- Specified by:
toGlTextureProcessor
in interfaceGlEffect
- Parameters:
context
- AContext
.useHdr
- Whether input textures come from an HDR source. Iftrue
, colors will be in linear RGB BT.2020. Iffalse
, colors will be in linear RGB BT.709.- Throws:
FrameProcessingException
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