Top Description Fields Constructors Methods
org.lwjgl.stb

public Class STBImageWrite

extends Object
Class Inheritance
Imports
java.nio.*, org.lwjgl.*, org.lwjgl.system.*
Native bindings to stb_image_write.h from the stb library.

ABOUT

This header file is a library for writing images to C stdio.

The PNG output is not optimal; it is 20-50% larger than the file written by a decent optimizing implementation; though providing a custom zlib compress function (see zlib_compress) can mitigate that. This library is designed for source code compactness and simplicity, not optimal image file size or run-time performance.

USAGE

There are five functions, one for each image file format:


int stbi_write_png(char const *filename, int w, int h, int comp, const void *data, int stride_in_bytes);
int stbi_write_bmp(char const *filename, int w, int h, int comp, const void *data);
int stbi_write_tga(char const *filename, int w, int h, int comp, const void *data);
int stbi_write_hdr(char const *filename, int w, int h, int comp, const void *data);
int stbi_write_jpg(char const *filename, int w, int h, int comp, const float *data, int quality);

void stbi_flip_vertically_on_write(int flag); // flag is non-zero to flip data vertically

There are also five equivalent functions that use an arbitrary write function. You are expected to open/close your file-equivalent before and after calling these:


int stbi_write_png_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void  *data, int stride_in_bytes);
int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void  *data);
int stbi_write_tga_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void  *data);
int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const float *data);
int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality);

where the callback is:


void stbi_write_func(void *context, void *data, int size);

You can configure it with these global variables:


int stbi_write_tga_with_rle;             // defaults to true; set to 0 to disable RLE
int stbi_write_png_compression_level;    // defaults to 8; set to higher for more compression
int stbi_write_force_png_filter;         // defaults to -1; set to 0..5 to force a filter mode

The functions create an image file defined by the parameters. The image is a rectangle of pixels stored from left-to-right, top-to-bottom. Each pixel contains comp channels of data stored interleaved with 8-bits per channel, in the following order: 1=Y, 2=YA, 3=RGB, 4=RGBA. (Y is monochrome color.) The rectangle is w pixels wide and h pixels tall. The *data pointer points to the first byte of the top-left-most pixel.

Field Summary

Modifier and TypeField and Description
public static final IntBuffer
stbi_write_force_png_filter

Returns the address of the global variable stbi_write_force_png_filter.

public static final IntBuffer
stbi_write_png_compression_level

Returns the address of the global variable stbi_write_png_compression_level.

public static final IntBuffer
stbi_write_tga_with_rle

Returns the address of the global variable stbi_write_tga_with_rle.

public static final PointerBuffer
stbi_zlib_compress

Returns the address of the global variable stbi_zlib_compress.

Constructor Summary

AccessConstructor and Description
protected
STBImageWrite()

Method Summary

Modifier and TypeMethod and Description
public static native void
nstbi_flip_vertically_on_write(int flip_boolean)

Unsafe version of: flip_vertically_on_write

public static native int
nstbi_write_bmp(long filename, int w, int h, int comp, long data)

Unsafe version of: write_bmp

public static native int
nstbi_write_bmp_to_func(long func, long context, int w, int h, int comp, long data)

Unsafe version of: write_bmp_to_func

private static native long
nstbi_write_force_png_filter()

public static native int
nstbi_write_hdr(long filename, int w, int h, int comp, long data)

Unsafe version of: write_hdr

public static native int
nstbi_write_hdr(long filename, int w, int h, int comp, float[] data)

Array version of: nstbi_write_hdr

public static native int
nstbi_write_hdr_to_func(long func, long context, int w, int h, int comp, long data)

Unsafe version of: write_hdr_to_func

public static native int
nstbi_write_hdr_to_func(long func, long context, int w, int h, int comp, float[] data)

Array version of: nstbi_write_hdr_to_func

public static native int
nstbi_write_jpg(long filename, int w, int h, int comp, long data, int quality)

Unsafe version of: write_jpg

public static native int
nstbi_write_jpg_to_func(long func, long context, int w, int h, int comp, long data, int quality)

Unsafe version of: write_jpg_to_func

public static native int
nstbi_write_png(long filename, int w, int h, int comp, long data, int stride_in_bytes)

Unsafe version of: write_png

private static native long
nstbi_write_png_compression_level()

public static native int
nstbi_write_png_to_func(long func, long context, int w, int h, int comp, long data, int stride_in_bytes)

Unsafe version of: write_png_to_func

public static native int
nstbi_write_tga(long filename, int w, int h, int comp, long data)

Unsafe version of: write_tga

public static native int
nstbi_write_tga_to_func(long func, long context, int w, int h, int comp, long data)

Unsafe version of: write_tga_to_func

private static native long
nstbi_write_tga_with_rle()

private static native long
nstbi_zlib_compress()

public static void
stbi_flip_vertically_on_write(boolean
true to flip data vertically
flip_boolean)

Configures if the written image should flipped vertically.

public static boolean

Returns:

1 on success, 0 on failure
stbi_write_bmp(ByteBuffer
the image file path
filename, int
the image width, in pixels
w, int
the image height, in pixels
h, int
the number of channels in each pixel
comp, ByteBuffer
the image data
data)

Writes a BMP image file.

public static boolean

Returns:

1 on success, 0 on failure
stbi_write_bmp(CharSequence
the image file path
filename, int
the image width, in pixels
w, int
the image height, in pixels
h, int
the number of channels in each pixel
comp, ByteBuffer
the image data
data)

Writes a BMP image file.

public static boolean

Returns:

1 on success, 0 on failure
stbi_write_bmp_to_func(STBIWriteCallbackI
the callback function
func, long
a context that will be passed to func
context, int
the image width, in pixels
w, int
the image height, in pixels
h, int
the number of channels in each pixel
comp, ByteBuffer
the image data
data)

Callback version of write_bmp.

private static IntBuffer
stbi_write_force_png_filter()

public static boolean

Returns:

1 on success, 0 on failure
stbi_write_hdr(ByteBuffer
the image file path
filename, int
the image width, in pixels
w, int
the image height, in pixels
h, int
the number of channels in each pixel
comp, FloatBuffer
the image data
data)

Writes an HDR image file.

public static boolean

Returns:

1 on success, 0 on failure
stbi_write_hdr(CharSequence
the image file path
filename, int
the image width, in pixels
w, int
the image height, in pixels
h, int
the number of channels in each pixel
comp, FloatBuffer
the image data
data)

Writes an HDR image file.

public static boolean
stbi_write_hdr(ByteBuffer filename, int w, int h, int comp, float[] data)

Array version of: write_hdr

public static boolean
stbi_write_hdr(CharSequence filename, int w, int h, int comp, float[] data)

Array version of: write_hdr

public static boolean

Returns:

1 on success, 0 on failure
stbi_write_hdr_to_func(STBIWriteCallbackI
the callback function
func, long
a context that will be passed to func
context, int
the image width, in pixels
w, int
the image height, in pixels
h, int
the number of channels in each pixel
comp, FloatBuffer
the image data
data)

Callback version of write_hdr.

public static boolean
stbi_write_hdr_to_func(STBIWriteCallbackI func, long context, int w, int h, int comp, float[] data)

Array version of: write_hdr_to_func

public static boolean

Returns:

1 on success, 0 on failure
stbi_write_jpg(ByteBuffer
the image file path
filename, int
the image width, in pixels
w, int
the image height, in pixels
h, int
the number of channels in each pixel
comp, ByteBuffer
the image data
data, int
the compression quality
quality)

Writes a JPEG image file.

public static boolean

Returns:

1 on success, 0 on failure
stbi_write_jpg(CharSequence
the image file path
filename, int
the image width, in pixels
w, int
the image height, in pixels
h, int
the number of channels in each pixel
comp, ByteBuffer
the image data
data, int
the compression quality
quality)

Writes a JPEG image file.

public static int

Returns:

1 on success, 0 on failure
stbi_write_jpg_to_func(STBIWriteCallbackI
the callback function
func, long
a context that will be passed to func
context, int
the image width, in pixels
w, int
the image height, in pixels
h, int
the number of channels in each pixel
comp, ByteBuffer
the image data
data, int
the compression quality
quality)

Callback version of write_jpg.

public static boolean

Returns:

1 on success, 0 on failure
stbi_write_png(ByteBuffer
the image file path
filename, int
the image width, in pixels
w, int
the image height, in pixels
h, int
the number of channels in each pixel
comp, ByteBuffer
the image data
data, int
the distance in bytes from the first byte of a row of pixels to the first byte of the next row of pixels
stride_in_bytes)

Writes a PNR image file.

public static boolean

Returns:

1 on success, 0 on failure
stbi_write_png(CharSequence
the image file path
filename, int
the image width, in pixels
w, int
the image height, in pixels
h, int
the number of channels in each pixel
comp, ByteBuffer
the image data
data, int
the distance in bytes from the first byte of a row of pixels to the first byte of the next row of pixels
stride_in_bytes)

Writes a PNR image file.

private static IntBuffer
stbi_write_png_compression_level()

public static boolean

Returns:

1 on success, 0 on failure
stbi_write_png_to_func(STBIWriteCallbackI
the callback function
func, long
a context that will be passed to func
context, int
the image width, in pixels
w, int
the image height, in pixels
h, int
the number of channels in each pixel
comp, ByteBuffer
the image data
data, int
the distance in bytes from the first byte of a row of pixels to the first byte of the next row of pixels
stride_in_bytes)

Callback version of write_png.

public static boolean

Returns:

1 on success, 0 on failure
stbi_write_tga(ByteBuffer
the image file path
filename, int
the image width, in pixels
w, int
the image height, in pixels
h, int
the number of channels in each pixel
comp, ByteBuffer
the image data
data)

Writes a TGA image file.

public static boolean

Returns:

1 on success, 0 on failure
stbi_write_tga(CharSequence
the image file path
filename, int
the image width, in pixels
w, int
the image height, in pixels
h, int
the number of channels in each pixel
comp, ByteBuffer
the image data
data)

Writes a TGA image file.

public static boolean

Returns:

1 on success, 0 on failure
stbi_write_tga_to_func(STBIWriteCallbackI
the callback function
func, long
a context that will be passed to func
context, int
the image width, in pixels
w, int
the image height, in pixels
h, int
the number of channels in each pixel
comp, ByteBuffer
the image data
data)

Callback version of write_tga.

private static IntBuffer
stbi_write_tga_with_rle()

private static PointerBuffer
stbi_zlib_compress()

Inherited from java.lang.Object:
cloneequalsfinalizegetClasshashCodenotifynotifyAlltoStringwaitwaitwait

Field Detail

stbi_write_force_png_filterback to summary
public static final IntBuffer stbi_write_force_png_filter

Returns the address of the global variable stbi_write_force_png_filter.

stbi_write_png_compression_levelback to summary
public static final IntBuffer stbi_write_png_compression_level

Returns the address of the global variable stbi_write_png_compression_level.

stbi_write_tga_with_rleback to summary
public static final IntBuffer stbi_write_tga_with_rle

Returns the address of the global variable stbi_write_tga_with_rle.

stbi_zlib_compressback to summary
public static final PointerBuffer stbi_zlib_compress

Returns the address of the global variable stbi_zlib_compress.

The address of an STBIZlibCompress instance may be set to this variable, in order to override the Zlib compression implementation.

Constructor Detail

STBImageWriteback to summary
protected STBImageWrite()

Method Detail

nstbi_flip_vertically_on_writeback to summary
public static native void nstbi_flip_vertically_on_write(int flip_boolean)

Unsafe version of: flip_vertically_on_write

nstbi_write_bmpback to summary
public static native int nstbi_write_bmp(long filename, int w, int h, int comp, long data)

Unsafe version of: write_bmp

nstbi_write_bmp_to_funcback to summary
public static native int nstbi_write_bmp_to_func(long func, long context, int w, int h, int comp, long data)

Unsafe version of: write_bmp_to_func

nstbi_write_force_png_filterback to summary
private static native long nstbi_write_force_png_filter()
nstbi_write_hdrback to summary
public static native int nstbi_write_hdr(long filename, int w, int h, int comp, long data)

Unsafe version of: write_hdr

nstbi_write_hdrback to summary
public static native int nstbi_write_hdr(long filename, int w, int h, int comp, float[] data)

Array version of: nstbi_write_hdr

nstbi_write_hdr_to_funcback to summary
public static native int nstbi_write_hdr_to_func(long func, long context, int w, int h, int comp, long data)

Unsafe version of: write_hdr_to_func

nstbi_write_hdr_to_funcback to summary
public static native int nstbi_write_hdr_to_func(long func, long context, int w, int h, int comp, float[] data)

Array version of: nstbi_write_hdr_to_func

nstbi_write_jpgback to summary
public static native int nstbi_write_jpg(long filename, int w, int h, int comp, long data, int quality)

Unsafe version of: write_jpg

nstbi_write_jpg_to_funcback to summary
public static native int nstbi_write_jpg_to_func(long func, long context, int w, int h, int comp, long data, int quality)

Unsafe version of: write_jpg_to_func

nstbi_write_pngback to summary
public static native int nstbi_write_png(long filename, int w, int h, int comp, long data, int stride_in_bytes)

Unsafe version of: write_png

nstbi_write_png_compression_levelback to summary
private static native long nstbi_write_png_compression_level()
nstbi_write_png_to_funcback to summary
public static native int nstbi_write_png_to_func(long func, long context, int w, int h, int comp, long data, int stride_in_bytes)

Unsafe version of: write_png_to_func

nstbi_write_tgaback to summary
public static native int nstbi_write_tga(long filename, int w, int h, int comp, long data)

Unsafe version of: write_tga

nstbi_write_tga_to_funcback to summary
public static native int nstbi_write_tga_to_func(long func, long context, int w, int h, int comp, long data)

Unsafe version of: write_tga_to_func

nstbi_write_tga_with_rleback to summary
private static native long nstbi_write_tga_with_rle()
nstbi_zlib_compressback to summary
private static native long nstbi_zlib_compress()
stbi_flip_vertically_on_writeback to summary
public static void stbi_flip_vertically_on_write(boolean flip_boolean)

Configures if the written image should flipped vertically.

Parameters
flip_boolean:boolean

true to flip data vertically

stbi_write_bmpback to summary
public static boolean stbi_write_bmp(ByteBuffer filename, int w, int h, int comp, ByteBuffer data)

Writes a BMP image file.

The BMP format expands Y to RGB in the file format and does not output alpha.

Parameters
filename:ByteBuffer

the image file path

w:int

the image width, in pixels

h:int

the image height, in pixels

comp:int

the number of channels in each pixel

data:ByteBuffer

the image data

Returns:boolean

1 on success, 0 on failure

Annotations
@NativeType:int
stbi_write_bmpback to summary
public static boolean stbi_write_bmp(CharSequence filename, int w, int h, int comp, ByteBuffer data)

Writes a BMP image file.

The BMP format expands Y to RGB in the file format and does not output alpha.

Parameters
filename:CharSequence

the image file path

w:int

the image width, in pixels

h:int

the image height, in pixels

comp:int

the number of channels in each pixel

data:ByteBuffer

the image data

Returns:boolean

1 on success, 0 on failure

Annotations
@NativeType:int
stbi_write_bmp_to_funcback to summary
public static boolean stbi_write_bmp_to_func(STBIWriteCallbackI func, long context, int w, int h, int comp, ByteBuffer data)

Callback version of write_bmp.

Parameters
func:STBIWriteCallbackI

the callback function

context:long

a context that will be passed to func

w:int

the image width, in pixels

h:int

the image height, in pixels

comp:int

the number of channels in each pixel

data:ByteBuffer

the image data

Returns:boolean

1 on success, 0 on failure

Annotations
@NativeType:int
stbi_write_force_png_filterback to summary
private static IntBuffer stbi_write_force_png_filter()
Annotations
@NativeType:int *
stbi_write_hdrback to summary
public static boolean stbi_write_hdr(ByteBuffer filename, int w, int h, int comp, FloatBuffer data)

Writes an HDR image file.

HDR expects linear float data. Since the format is always 32-bit rgb(e) data, alpha (if provided) is discarded, and for monochrome data it is replicated across all three channels.

Parameters
filename:ByteBuffer

the image file path

w:int

the image width, in pixels

h:int

the image height, in pixels

comp:int

the number of channels in each pixel

data:FloatBuffer

the image data

Returns:boolean

1 on success, 0 on failure

Annotations
@NativeType:int
stbi_write_hdrback to summary
public static boolean stbi_write_hdr(CharSequence filename, int w, int h, int comp, FloatBuffer data)

Writes an HDR image file.

HDR expects linear float data. Since the format is always 32-bit rgb(e) data, alpha (if provided) is discarded, and for monochrome data it is replicated across all three channels.

Parameters
filename:CharSequence

the image file path

w:int

the image width, in pixels

h:int

the image height, in pixels

comp:int

the number of channels in each pixel

data:FloatBuffer

the image data

Returns:boolean

1 on success, 0 on failure

Annotations
@NativeType:int
stbi_write_hdrback to summary
public static boolean stbi_write_hdr(ByteBuffer filename, int w, int h, int comp, float[] data)

Array version of: write_hdr

Annotations
@NativeType:int
stbi_write_hdrback to summary
public static boolean stbi_write_hdr(CharSequence filename, int w, int h, int comp, float[] data)

Array version of: write_hdr

Annotations
@NativeType:int
stbi_write_hdr_to_funcback to summary
public static boolean stbi_write_hdr_to_func(STBIWriteCallbackI func, long context, int w, int h, int comp, FloatBuffer data)

Callback version of write_hdr.

Parameters
func:STBIWriteCallbackI

the callback function

context:long

a context that will be passed to func

w:int

the image width, in pixels

h:int

the image height, in pixels

comp:int

the number of channels in each pixel

data:FloatBuffer

the image data

Returns:boolean

1 on success, 0 on failure

Annotations
@NativeType:int
stbi_write_hdr_to_funcback to summary
public static boolean stbi_write_hdr_to_func(STBIWriteCallbackI func, long context, int w, int h, int comp, float[] data)

Array version of: write_hdr_to_func

Annotations
@NativeType:int
stbi_write_jpgback to summary
public static boolean stbi_write_jpg(ByteBuffer filename, int w, int h, int comp, ByteBuffer data, int quality)

Writes a JPEG image file.

JPEG does ignore alpha channels in input data; quality is between 1 and 100. Higher quality looks better but results in a bigger image. JPEG baseline (no JPEG progressive).

Parameters
filename:ByteBuffer

the image file path

w:int

the image width, in pixels

h:int

the image height, in pixels

comp:int

the number of channels in each pixel

data:ByteBuffer

the image data

quality:int

the compression quality

Returns:boolean

1 on success, 0 on failure

Annotations
@NativeType:int
stbi_write_jpgback to summary
public static boolean stbi_write_jpg(CharSequence filename, int w, int h, int comp, ByteBuffer data, int quality)

Writes a JPEG image file.

JPEG does ignore alpha channels in input data; quality is between 1 and 100. Higher quality looks better but results in a bigger image. JPEG baseline (no JPEG progressive).

Parameters
filename:CharSequence

the image file path

w:int

the image width, in pixels

h:int

the image height, in pixels

comp:int

the number of channels in each pixel

data:ByteBuffer

the image data

quality:int

the compression quality

Returns:boolean

1 on success, 0 on failure

Annotations
@NativeType:int
stbi_write_jpg_to_funcback to summary
public static int stbi_write_jpg_to_func(STBIWriteCallbackI func, long context, int w, int h, int comp, ByteBuffer data, int quality)

Callback version of write_jpg.

Parameters
func:STBIWriteCallbackI

the callback function

context:long

a context that will be passed to func

w:int

the image width, in pixels

h:int

the image height, in pixels

comp:int

the number of channels in each pixel

data:ByteBuffer

the image data

quality:int

the compression quality

Returns:int

1 on success, 0 on failure

stbi_write_pngback to summary
public static boolean stbi_write_png(ByteBuffer filename, int w, int h, int comp, ByteBuffer data, int stride_in_bytes)

Writes a PNR image file.

PNG creates output files with the same number of components as the input.

PNG supports writing rectangles of data even when the bytes storing rows of data are not consecutive in memory (e.g. sub-rectangles of a larger image), by supplying the stride between the beginning of adjacent rows. The other formats do not. (Thus you cannot write a native-format BMP through the BMP writer, both because it is in BGR order and because it may have padding at the end of the line.)

PNG allows you to set the deflate compression level by setting the global variable write_png_compression_level (it defaults to 8).

Parameters
filename:ByteBuffer

the image file path

w:int

the image width, in pixels

h:int

the image height, in pixels

comp:int

the number of channels in each pixel

data:ByteBuffer

the image data

stride_in_bytes:int

the distance in bytes from the first byte of a row of pixels to the first byte of the next row of pixels

Returns:boolean

1 on success, 0 on failure

Annotations
@NativeType:int
stbi_write_pngback to summary
public static boolean stbi_write_png(CharSequence filename, int w, int h, int comp, ByteBuffer data, int stride_in_bytes)

Writes a PNR image file.

PNG creates output files with the same number of components as the input.

PNG supports writing rectangles of data even when the bytes storing rows of data are not consecutive in memory (e.g. sub-rectangles of a larger image), by supplying the stride between the beginning of adjacent rows. The other formats do not. (Thus you cannot write a native-format BMP through the BMP writer, both because it is in BGR order and because it may have padding at the end of the line.)

PNG allows you to set the deflate compression level by setting the global variable write_png_compression_level (it defaults to 8).

Parameters
filename:CharSequence

the image file path

w:int

the image width, in pixels

h:int

the image height, in pixels

comp:int

the number of channels in each pixel

data:ByteBuffer

the image data

stride_in_bytes:int

the distance in bytes from the first byte of a row of pixels to the first byte of the next row of pixels

Returns:boolean

1 on success, 0 on failure

Annotations
@NativeType:int
stbi_write_png_compression_levelback to summary
private static IntBuffer stbi_write_png_compression_level()
Annotations
@NativeType:int *
stbi_write_png_to_funcback to summary
public static boolean stbi_write_png_to_func(STBIWriteCallbackI func, long context, int w, int h, int comp, ByteBuffer data, int stride_in_bytes)

Callback version of write_png.

Parameters
func:STBIWriteCallbackI

the callback function

context:long

a context that will be passed to func

w:int

the image width, in pixels

h:int

the image height, in pixels

comp:int

the number of channels in each pixel

data:ByteBuffer

the image data

stride_in_bytes:int

the distance in bytes from the first byte of a row of pixels to the first byte of the next row of pixels

Returns:boolean

1 on success, 0 on failure

Annotations
@NativeType:int
stbi_write_tgaback to summary
public static boolean stbi_write_tga(ByteBuffer filename, int w, int h, int comp, ByteBuffer data)

Writes a TGA image file.

TGA supports RLE or non-RLE compressed data. To use non-RLE-compressed data, set the global variable stbi_write_tga_with_rle to 0. The variable can be accessed with write_tga_with_rle.

Parameters
filename:ByteBuffer

the image file path

w:int

the image width, in pixels

h:int

the image height, in pixels

comp:int

the number of channels in each pixel

data:ByteBuffer

the image data

Returns:boolean

1 on success, 0 on failure

Annotations
@NativeType:int
stbi_write_tgaback to summary
public static boolean stbi_write_tga(CharSequence filename, int w, int h, int comp, ByteBuffer data)

Writes a TGA image file.

TGA supports RLE or non-RLE compressed data. To use non-RLE-compressed data, set the global variable stbi_write_tga_with_rle to 0. The variable can be accessed with write_tga_with_rle.

Parameters
filename:CharSequence

the image file path

w:int

the image width, in pixels

h:int

the image height, in pixels

comp:int

the number of channels in each pixel

data:ByteBuffer

the image data

Returns:boolean

1 on success, 0 on failure

Annotations
@NativeType:int
stbi_write_tga_to_funcback to summary
public static boolean stbi_write_tga_to_func(STBIWriteCallbackI func, long context, int w, int h, int comp, ByteBuffer data)

Callback version of write_tga.

Parameters
func:STBIWriteCallbackI

the callback function

context:long

a context that will be passed to func

w:int

the image width, in pixels

h:int

the image height, in pixels

comp:int

the number of channels in each pixel

data:ByteBuffer

the image data

Returns:boolean

1 on success, 0 on failure

Annotations
@NativeType:int
stbi_write_tga_with_rleback to summary
private static IntBuffer stbi_write_tga_with_rle()
Annotations
@NativeType:int *
stbi_zlib_compressback to summary
private static PointerBuffer stbi_zlib_compress()
Annotations
@NativeType:unsigned char * (*) (unsigned char *, int, int *, int) *