ETC1Util
public
class
ETC1Util
extends Object
java.lang.Object | |
↳ | android.opengl.ETC1Util |
Utility methods for using ETC1 compressed textures.
Summary
Nested classes | |
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class |
ETC1Util.ETC1Texture
A utility class encapsulating a compressed ETC1 texture. |
Public constructors | |
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ETC1Util()
|
Public methods | |
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static
ETC1Util.ETC1Texture
|
compressTexture(Buffer input, int width, int height, int pixelSize, int stride)
Helper function that compresses an image into an ETC1Texture. |
static
ETC1Util.ETC1Texture
|
createTexture(InputStream input)
Create a new ETC1Texture from an input stream containing a PKM formatted compressed texture. |
static
boolean
|
isETC1Supported()
Check if ETC1 texture compression is supported by the active OpenGL ES context. |
static
void
|
loadTexture(int target, int level, int border, int fallbackFormat, int fallbackType, InputStream input)
Convenience method to load an ETC1 texture whether or not the active OpenGL context supports the ETC1 texture compression format. |
static
void
|
loadTexture(int target, int level, int border, int fallbackFormat, int fallbackType, ETC1Util.ETC1Texture texture)
Convenience method to load an ETC1 texture whether or not the active OpenGL context supports the ETC1 texture compression format. |
static
void
|
writeTexture(ETC1Util.ETC1Texture texture, OutputStream output)
Helper function that writes an ETC1Texture to an output stream formatted as a PKM file. |
Inherited methods | |
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Public constructors
ETC1Util
public ETC1Util ()
Public methods
compressTexture
public static ETC1Util.ETC1Texture compressTexture (Buffer input, int width, int height, int pixelSize, int stride)
Helper function that compresses an image into an ETC1Texture.
Parameters | |
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input |
Buffer : a native order direct buffer containing the image data |
width |
int : the width of the image in pixels |
height |
int : the height of the image in pixels |
pixelSize |
int : the size of a pixel in bytes (2 or 3) |
stride |
int : the width of a line of the image in bytes |
Returns | |
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ETC1Util.ETC1Texture |
the ETC1 texture. |
createTexture
public static ETC1Util.ETC1Texture createTexture (InputStream input)
Create a new ETC1Texture from an input stream containing a PKM formatted compressed texture.
Parameters | |
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input |
InputStream : an input stream containing a PKM formatted compressed texture. |
Returns | |
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ETC1Util.ETC1Texture |
an ETC1Texture read from the input stream. |
Throws | |
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|
java.io.IOException |
IOException |
isETC1Supported
public static boolean isETC1Supported ()
Check if ETC1 texture compression is supported by the active OpenGL ES context.
Returns | |
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boolean |
true if the active OpenGL ES context supports ETC1 texture compression. |
loadTexture
public static void loadTexture (int target, int level, int border, int fallbackFormat, int fallbackType, InputStream input)
Convenience method to load an ETC1 texture whether or not the active OpenGL context supports the ETC1 texture compression format.
Parameters | |
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target |
int : the texture target. |
level |
int : the texture level |
border |
int : the border size. Typically 0. |
fallbackFormat |
int : the format to use if ETC1 texture compression is not supported.
Must be GL_RGB. |
fallbackType |
int : the type to use if ETC1 texture compression is not supported.
Can be either GL_UNSIGNED_SHORT_5_6_5, which implies 16-bits-per-pixel,
or GL_UNSIGNED_BYTE, which implies 24-bits-per-pixel. |
input |
InputStream : the input stream containing an ETC1 texture in PKM format. |
Throws | |
---|---|
|
java.io.IOException |
IOException |
loadTexture
public static void loadTexture (int target, int level, int border, int fallbackFormat, int fallbackType, ETC1Util.ETC1Texture texture)
Convenience method to load an ETC1 texture whether or not the active OpenGL context supports the ETC1 texture compression format.
Parameters | |
---|---|
target |
int : the texture target. |
level |
int : the texture level |
border |
int : the border size. Typically 0. |
fallbackFormat |
int : the format to use if ETC1 texture compression is not supported.
Must be GL_RGB. |
fallbackType |
int : the type to use if ETC1 texture compression is not supported.
Can be either GL_UNSIGNED_SHORT_5_6_5, which implies 16-bits-per-pixel,
or GL_UNSIGNED_BYTE, which implies 24-bits-per-pixel. |
texture |
ETC1Util.ETC1Texture : the ETC1 to load. |
writeTexture
public static void writeTexture (ETC1Util.ETC1Texture texture, OutputStream output)
Helper function that writes an ETC1Texture to an output stream formatted as a PKM file.
Parameters | |
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texture |
ETC1Util.ETC1Texture : the input texture. |
output |
OutputStream : the stream to write the formatted texture data to. |
Throws | |
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|
java.io.IOException |
IOException |
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Last updated 2024-04-04 UTC.