encoder/com.pedro.encoder.utils.gl.gif/GifDecoder

GifDecoder

open class GifDecoder

Reads frame data from a GIF image source and decodes it into individual frames for animation purposes. Image data can be read from either and InputStream source or a byte[]. This class is optimized for running animations with the frames, there are no methods to get individual frame images, only to decode the next frame in the animation sequence. Instead, it lowers its memory footprint by only housing the minimum data necessary to decode the next frame in the animation sequence. The animation must be manually moved forward using advance before requesting the next frame. This method must also be called before you request the first frame or an error will occur. Implementation adapted from sample code published in Lyons. (2004). Java for Programmers, republished under the MIT Open Source License

Constructors

constructor(provider: GifDecoder.BitmapProvider, gifHeader: GifHeader, rawData: ByteBuffer)

constructor(provider: GifDecoder.BitmapProvider, gifHeader: GifHeader, rawData: ByteBuffer, sampleSize: Int)

constructor(provider: GifDecoder.BitmapProvider)

constructor()

Properties

open val loopIndex: Int

open val status: Int

Functions

open fun advance(): Boolean

Move the animation frame counter forward.

open fun clear()

open fun getByteSize(): Int

Returns an estimated byte size for this decoder based on the data provided to setData, as well as internal buffers.

getCurrentFrameIndex

open fun getCurrentFrameIndex(): Int

Gets the current index of the animation frame, or -1 if animation hasn't not yet started.

open fun getDelay(n: Int): Int

Gets display duration for specified frame.

open fun getFrameCount(): Int

Gets the number of frames read from file.

open fun getHeight(): Int

open fun getLoopCount(): Int

Gets the "Netscape" iteration count, if any.

open fun getNextDelay(): Int

Gets display duration for the upcoming frame in ms.

open fun getNextFrame(): Bitmap

Get the next frame in the animation sequence.

open fun getWidth(): Int

open fun read(data: Array<Byte>): Int

Reads GIF image from byte array.

open fun read(is: InputStream, contentLength: Int): Int

Reads GIF image from stream.

resetFrameIndex

open fun resetFrameIndex()

Resets the frame pointer to before the 0th frame, as if we'd never used this decoder to decode any frames.

open fun resetLoopIndex()

Resets the loop index to the first loop.

open fun setData(header: GifHeader, data: Array<Byte>)

open fun setData(header: GifHeader, buffer: ByteBuffer)

open fun setData(header: GifHeader, buffer: ByteBuffer, sampleSize: Int)

open fun setFrameIndex(frame: Int): Boolean

Sets the frame pointer to a specific frame