File	Doc	Category	Size	Date	Package
ETC1.java	API Doc	Android 5.1 API	4919	Thu Mar 12 22:22:40 GMT 2015	android.opengl

ETC1

• java.lang.Object

Fields Summary
public static final int	ENCODED_BLOCK_SIZE Size in bytes of an encoded block.
public static final int	DECODED_BLOCK_SIZE Size in bytes of a decoded block.
public static final int	ETC_PKM_HEADER_SIZE Size of a PKM file header, in bytes.
public static final int	ETC1_RGB8_OES Accepted by the internalformat parameter of glCompressedTexImage2D.

Constructors Summary

Methods Summary
public static native void	decodeBlock(java.nio.Buffer in, java.nio.Buffer out) Decode a block of pixels. param in a native order direct buffer of size ENCODED_BLOCK_SIZE that contains the ETC1 compressed version of the data. param out a native order direct buffer of size DECODED_BLOCK_SIZE that will receive the decoded data. The data represents a 4 x 4 square of 3-byte pixels in form R, G, B. Byte (3 * (x + 4 * y) is the R value of pixel (x, y).
public static native void	decodeImage(java.nio.Buffer in, java.nio.Buffer out, int width, int height, int pixelSize, int stride) Decode an entire image. param in native order direct buffer of the encoded data. param out native order direct buffer of the image data. Will be written such that pixel (x,y) is at pIn + pixelSize * x + stride * y. Must be large enough to store entire image. param pixelSize must be 2 or 3. 2 is an GL_UNSIGNED_SHORT_5_6_5 image, 3 is a GL_BYTE RGB image.
public static native void	encodeBlock(java.nio.Buffer in, int validPixelMask, java.nio.Buffer out) Encode a block of pixels. param in a native order direct buffer of size DECODED_BLOCK_SIZE that represent a 4 x 4 square of 3-byte pixels in form R, G, B. Byte (3 * (x + 4 * y) is the R value of pixel (x, y). param validPixelMask is a 16-bit mask where bit (1 << (x + y * 4)) indicates whether the corresponding (x,y) pixel is valid. Invalid pixel color values are ignored when compressing. param out a native order direct buffer of size ENCODED_BLOCK_SIZE that receives the ETC1 compressed version of the data.
public static native void	encodeImage(java.nio.Buffer in, int width, int height, int pixelSize, int stride, java.nio.Buffer out) Encode an entire image. param in a native order direct buffer of the image data. Formatted such that pixel (x,y) is at pIn + pixelSize * x + stride * y; param out a native order direct buffer of the encoded data. Must be large enough to store entire encoded image. param pixelSize must be 2 or 3. 2 is an GL_UNSIGNED_SHORT_5_6_5 image, 3 is a GL_BYTE RGB image.
public static native void	formatHeader(java.nio.Buffer header, int width, int height) Format a PKM header param header native order direct buffer of the header. param width the width of the image in pixels. param height the height of the image in pixels.
public static native int	getEncodedDataSize(int width, int height) Return the size of the encoded image data (does not include size of PKM header).
public static native int	getHeight(java.nio.Buffer header) Read the image height from a PKM header param header native order direct buffer of the header.
public static native int	getWidth(java.nio.Buffer header) Read the image width from a PKM header param header native order direct buffer of the header.
public static native boolean	isValid(java.nio.Buffer header) Check if a PKM header is correctly formatted. param header native order direct buffer of the header.