WebP image reading, writing and animations support. More...

Collaboration diagram for WebP:

Data Structures
struct	gdWebpInfo
	WebP container information. More...

struct	gdWebpFrameInfo
	WebP animation frame information. More...

struct	gdWebpReadOptions
	WebP multi-image/animation reader options. More...

struct	gdWebpWriteOptions
	WebP still-image writer options. More...

struct	gdWebpAnimWriteOptions
	WebP animation writer options. More...

Macros
#define	gdWebpLossless 101
	Lossless WebP quality threshold.

Functions
void	gdImageWebpEx (gdImagePtr im, FILE *outFile, int quantization)
	Write an image as WebP data to a stdio file with a quality setting.

void	gdImageWebp (gdImagePtr im, FILE *outFile)
	Write an image as WebP data to a stdio file with default quality.

void *	gdImageWebpPtr (gdImagePtr im, int *size)
	Write an image as WebP data to a newly allocated memory buffer.

void *	gdImageWebpPtrEx (gdImagePtr im, int *size, int quantization)
	Write an image as WebP data to a newly allocated memory buffer with a quality setting.

int	gdImageWebpWithOptions (gdImagePtr im, FILE outFile, const gdWebpWriteOptions options)
	Write an image as WebP data to a stdio file using write options.

int	gdImageWebpCtxWithOptions (gdImagePtr im, gdIOCtxPtr outfile, const gdWebpWriteOptions *options)
	Write an image as WebP data to a gdIOCtx using write options.

void *	gdImageWebpPtrWithOptions (gdImagePtr im, int size, const gdWebpWriteOptions options)
	Write an image as WebP data to a newly allocated memory buffer using write options.

void	gdImageWebpCtx (gdImagePtr im, gdIOCtxPtr outfile, int quantization)
	Write an image as WebP data to a gdIOCtx with a quality setting.

WebP Types And Constants
enum	{ gdWebpDisposeNone , gdWebpDisposeBackground }
	WebP frame disposal methods. More...

enum	{ gdWebpBlendAlpha , gdWebpBlendNone }
	WebP frame blend methods. More...

typedef struct gdWebpRead *	gdWebpReadPtr
	Opaque WebP animation reader handle.

typedef struct gdWebpWrite *	gdWebpWritePtr
	Opaque WebP animation writer handle.

void	gdWebpReadOptionsInit (gdWebpReadOptions *options)
	Initialize WebP multi-image/animation read options with gd defaults.

void	gdWebpWriteOptionsInit (gdWebpWriteOptions *options)
	Initialize WebP still-image write options with gd defaults.

void	gdWebpAnimWriteOptionsInit (gdWebpAnimWriteOptions *options)
	Initialize WebP multi-image/animation write options with gd defaults.

Single-Image Reading
gdImagePtr	gdImageCreateFromWebp (FILE *inFile)
	Create a truecolor image from a WebP stdio file.

gdImagePtr	gdImageCreateFromWebpPtr (int size, void *data)
	Create a truecolor image from a WebP memory buffer.

gdImagePtr	gdImageCreateFromWebpCtx (gdIOCtxPtr infile)
	Create a truecolor image from WebP data read through a gdIOCtx.

WebP Multi-Image/Animation Reading
int	gdWebpIsAnimated (FILE *fd)
	Test whether a WebP stdio file contains animation.

int	gdWebpIsAnimatedCtx (gdIOCtxPtr in)
	Test whether a seekable gdIOCtx contains animated WebP data.

int	gdWebpIsAnimatedPtr (int size, void *data)
	Test whether a WebP memory buffer contains animation.

gdWebpReadPtr	gdWebpReadOpen (FILE fd, const gdWebpReadOptions options)
	Open a WebP animation reader from a stdio file.

gdWebpReadPtr	gdWebpReadOpenCtx (gdIOCtxPtr in, const gdWebpReadOptions *options)
	Open a WebP animation reader from a gdIOCtx.

gdWebpReadPtr	gdWebpReadOpenPtr (int size, void data, const gdWebpReadOptions options)
	Open a WebP animation reader from a memory buffer.

void	gdWebpReadClose (gdWebpReadPtr webp)
	Close a WebP animation reader.

int	gdWebpReadGetInfo (gdWebpReadPtr webp, gdWebpInfo *info)
	Get WebP container information from a WebP reader.

int	gdWebpReadGetMetadata (gdWebpReadPtr webp, gdImageMetadata *metadata)
	Extract opaque EXIF, XMP, and ICC metadata from a WebP reader.

int	gdWebpReadNextFrame (gdWebpReadPtr webp, gdWebpFrameInfo info, gdImagePtr frame)
	Read the next raw WebP animation frame rectangle.

int	gdWebpReadNextImage (gdWebpReadPtr webp, gdWebpFrameInfo info, gdImagePtr image)
	Read the next coalesced WebP animation image.

WebP Multi-Image/Animation Writing
gdWebpWritePtr	gdWebpWriteOpen (FILE outFile, const gdWebpAnimWriteOptions options)
	Open a WebP animation writer for a stdio file.

gdWebpWritePtr	gdWebpWriteOpenCtx (gdIOCtxPtr out, const gdWebpAnimWriteOptions *options)
	Open a WebP animation writer for a gdIOCtx.

gdWebpWritePtr	gdWebpWriteOpenPtr (const gdWebpAnimWriteOptions *options)
	Open a WebP animation writer that returns a memory buffer.

int	gdWebpWriteAddImage (gdWebpWritePtr webp, gdImagePtr image, int durationMs)
	Add an image to a WebP animation writer.

void	gdWebpWriteClose (gdWebpWritePtr webp)
	Finish, write, and close a WebP animation writer.

void *	gdWebpWritePtrFinish (gdWebpWritePtr webp, int *size)
	Finish a WebP memory writer and return the encoded buffer.

Detailed Description

WebP image reading, writing and animations support.

WebP support reads still images as truecolor gd images and provides animation readers for raw frame rectangles or coalesced full-canvas images. WebP writers accept truecolor gd images; single-image pointer writers return buffers that must be freed with gdFree(), and animation writers are closed with gdWebpWriteClose() or gdWebpWritePtrFinish().

FILE *in, *out;
gdWebpReadPtr reader;
gdWebpWritePtr writer;
gdWebpInfo info;
gdWebpFrameInfo frameInfo;
gdWebpAnimWriteOptions options;
gdImagePtr image;
int result;
 
in = fopen("input.webp", "rb");
if (in == NULL) {
  fprintf(stderr, "cannot open input.webp\n");
  exit(1);
}
 
reader = gdWebpReadOpen(in, NULL);
fclose(in);
if (reader == NULL || !gdWebpReadGetInfo(reader, &info)) {
  fprintf(stderr, "cannot read WebP\n");
  if (reader != NULL) {
    gdWebpReadClose(reader);
  }
  exit(1);
}
 
gdWebpAnimWriteOptionsInit(&options);
options.canvasWidth = info.width;
options.canvasHeight = info.height;
options.loopCount = info.loopCount;
options.backgroundColor = info.backgroundColor;
options.quality = gdWebpLossless;
 
out = fopen("output.webp", "wb");
if (out == NULL) {
  gdWebpReadClose(reader);
  exit(1);
}
writer = gdWebpWriteOpen(out, &options);
if (writer == NULL) {
  fclose(out);
  gdWebpReadClose(reader);
  exit(1);
}
 
while ((result = gdWebpReadNextImage(reader, &frameInfo, &image)) == 1) {
  if (!gdWebpWriteAddImage(writer, image, frameInfo.duration)) {
    gdImageDestroy(image);
    gdWebpWriteClose(writer);
    fclose(out);
    gdWebpReadClose(reader);
    exit(1);
  }
  gdImageDestroy(image);
}
 
gdWebpWriteClose(writer);
fclose(out);
gdWebpReadClose(reader);

Macro Definition Documentation

◆ gdWebpLossless

#define gdWebpLossless 101

Lossless WebP quality threshold.

When the quantization value passed to gdImageWebpEx(), gdImageWebpCtx(), or gdImageWebpPtrEx() is greater than or equal to gdWebpLossless, the image is written in lossless WebP format.

Typedef Documentation

◆ gdWebpReadPtr

typedef struct gdWebpRead* gdWebpReadPtr

Opaque WebP animation reader handle.

Handles returned by gdWebpReadOpen(), gdWebpReadOpenCtx(), or gdWebpReadOpenPtr() must be closed with gdWebpReadClose().

◆ gdWebpWritePtr

typedef struct gdWebpWrite* gdWebpWritePtr

Opaque WebP animation writer handle.

Handles returned by gdWebpWriteOpen() or gdWebpWriteOpenCtx() must be closed with gdWebpWriteClose(). Handles returned by gdWebpWriteOpenPtr() must be finished with gdWebpWritePtrFinish().

Enumeration Type Documentation

◆ anonymous enum

anonymous enum

WebP frame disposal methods.

Enumerator
gdWebpDisposeNone	Do not dispose the frame after display.
gdWebpDisposeBackground	Clear the frame rectangle to the background after display.

◆ anonymous enum

anonymous enum

WebP frame blend methods.

Enumerator
gdWebpBlendAlpha	Blend the frame using alpha compositing.
gdWebpBlendNone	Replace the frame rectangle without alpha blending.

Function Documentation

◆ gdImageCreateFromWebp()

gdImagePtr gdImageCreateFromWebp ( FILE * inFile )

Create a truecolor image from a WebP stdio file.

gdImageCreateFromWebp() does not close inFile. The returned image is caller-owned and must be destroyed with gdImageDestroy.

Parameters

inFile Pointer to the input FILE stream.

Returns: Returns a gdImagePtr on success, or NULL on failure.

◆ gdImageCreateFromWebpCtx()

gdImagePtr gdImageCreateFromWebpCtx ( gdIOCtxPtr infile )

Create a truecolor image from WebP data read through a gdIOCtx.

gdImageCreateFromWebpCtx() does not close infile. The returned image is caller-owned and must be destroyed with gdImageDestroy.

Parameters

infile Pointer to the gdIOCtx input context.

Returns: Returns a gdImagePtr on success, or NULL on failure.

◆ gdImageCreateFromWebpPtr()

gdImagePtr gdImageCreateFromWebpPtr	(	int	size,
		void *	data
	)

Create a truecolor image from a WebP memory buffer.

The data buffer is borrowed for the duration of the call. The returned image is caller-owned and must be destroyed with gdImageDestroy.

Parameters

size	Size of the WebP memory buffer in bytes.
data	Pointer to the WebP memory buffer.

Returns: Returns a gdImagePtr on success, or NULL on failure.

◆ gdImageWebp()

void gdImageWebp	(	gdImagePtr	im,
		FILE *	outFile
	)

Write an image as WebP data to a stdio file with default quality.

gdImageWebp() does not close outFile. The image is borrowed for the duration of the call and must be a truecolor image.

Parameters

im	The image to write.
outFile	Pointer to the output FILE stream.

◆ gdImageWebpCtx()

void gdImageWebpCtx	(	gdImagePtr	im,
		gdIOCtxPtr	outfile,
		int	quantization
	)

Write an image as WebP data to a gdIOCtx with a quality setting.

gdImageWebpCtx() does not close outfile. The image is borrowed for the duration of the call and must be a truecolor image.

Parameters

im	The image to write.
outfile	Pointer to the gdIOCtx output context.
quantization	WebP quality: -1 for default, 0-100 for lossy, or gdWebpLossless for lossless.

◆ gdImageWebpCtxWithOptions()

int gdImageWebpCtxWithOptions	(	gdImagePtr	im,
		gdIOCtxPtr	outfile,
		const gdWebpWriteOptions *	options
	)

Write an image as WebP data to a gdIOCtx using write options.

gdImageWebpCtxWithOptions() does not close outfile. The image is borrowed for the duration of the call and must be a truecolor image.

Parameters

im	The image to write.
outfile	Pointer to the gdIOCtx output context.
options	Pointer to WebP write options, or NULL for defaults.

Returns: Returns 0 on success, or 1 on failure.

◆ gdImageWebpEx()

void gdImageWebpEx	(	gdImagePtr	im,
		FILE *	outFile,
		int	quantization
	)

Write an image as WebP data to a stdio file with a quality setting.

gdImageWebpEx() does not close outFile. The image is borrowed for the duration of the call and must be a truecolor image.

Parameters

im	The image to write.
outFile	Pointer to the output FILE stream.
quantization	WebP quality: -1 for default, 0-100 for lossy, or gdWebpLossless for lossless.

◆ gdImageWebpPtr()

void * gdImageWebpPtr	(	gdImagePtr	im,
		int *	size
	)

Write an image as WebP data to a newly allocated memory buffer.

The image is borrowed for the duration of the call and must be a truecolor image. The returned buffer is caller-owned and must be freed with gdFree().

Parameters

im	The image to write.
size	Pointer to an integer that receives the returned buffer size.

Returns: Returns a pointer to the newly allocated WebP buffer, or NULL on failure.

◆ gdImageWebpPtrEx()

void * gdImageWebpPtrEx	(	gdImagePtr	im,
		int *	size,
		int	quantization
	)

Write an image as WebP data to a newly allocated memory buffer with a quality setting.

The image is borrowed for the duration of the call and must be a truecolor image. The returned buffer is caller-owned and must be freed with gdFree().

Parameters

im	The image to write.
size	Pointer to an integer that receives the returned buffer size.
quantization	WebP quality: -1 for default, 0-100 for lossy, or gdWebpLossless for lossless.

Returns: Returns a pointer to the newly allocated WebP buffer, or NULL on failure.

◆ gdImageWebpPtrWithOptions()

void * gdImageWebpPtrWithOptions	(	gdImagePtr	im,
		int *	size,
		const gdWebpWriteOptions *	options
	)

Write an image as WebP data to a newly allocated memory buffer using write options.

The image is borrowed for the duration of the call and must be a truecolor image. The returned buffer is caller-owned and must be freed with gdFree().

Parameters

im	The image to write.
size	Pointer to an integer that receives the returned buffer size.
options	Pointer to WebP write options, or NULL for defaults.

Returns: Returns a pointer to the newly allocated WebP buffer, or NULL on failure.

◆ gdImageWebpWithOptions()

int gdImageWebpWithOptions	(	gdImagePtr	im,
		FILE *	outFile,
		const gdWebpWriteOptions *	options
	)

Write an image as WebP data to a stdio file using write options.

gdImageWebpWithOptions() does not close outFile. The image is borrowed for the duration of the call and must be a truecolor image.

Parameters

im	The image to write.
outFile	Pointer to the output FILE stream.
options	Pointer to WebP write options, or NULL for defaults.

Returns: Returns 0 on success, or 1 on failure.

◆ gdWebpAnimWriteOptionsInit()

void gdWebpAnimWriteOptionsInit ( gdWebpAnimWriteOptions * options )

Initialize WebP multi-image/animation write options with gd defaults.

The default writer infers the canvas size from the first frame, writes lossy WebP with libwebp's default animation settings, and uses loopCount 0 for infinite looping.

Parameters

options Pointer to the write options structure to initialize.

◆ gdWebpIsAnimated()

int gdWebpIsAnimated ( FILE * fd )

Test whether a WebP stdio file contains animation.

The stream position is restored before returning when possible. gdWebpIsAnimated() does not close fd.

Parameters

fd	Pointer to the input FILE stream.

Returns: Returns 1 for animated WebP, 0 for still WebP, or -1 on error.

◆ gdWebpIsAnimatedCtx()

int gdWebpIsAnimatedCtx ( gdIOCtxPtr in )

Test whether a seekable gdIOCtx contains animated WebP data.

The context position is restored before returning when possible. gdWebpIsAnimatedCtx() does not close in.

Parameters

in	Pointer to the gdIOCtx input context.

Returns: Returns 1 for animated WebP, 0 for still WebP, or -1 on error.

◆ gdWebpIsAnimatedPtr()

int gdWebpIsAnimatedPtr	(	int	size,
		void *	data
	)

Test whether a WebP memory buffer contains animation.

The data buffer is borrowed for the duration of the call.

Parameters

size	Size of the WebP memory buffer in bytes.
data	Pointer to the WebP memory buffer.

Returns: Returns 1 for animated WebP, 0 for still WebP, or -1 on error.

◆ gdWebpReadClose()

void gdWebpReadClose ( gdWebpReadPtr webp )

Close a WebP animation reader.

Parameters

webp	WebP reader handle to close, or NULL.

◆ gdWebpReadGetInfo()

int gdWebpReadGetInfo	(	gdWebpReadPtr	webp,
		gdWebpInfo *	info
	)

Get WebP container information from a WebP reader.

Parameters

webp	WebP reader handle.
info	Pointer to a gdWebpInfo structure to receive container information.

Returns: Returns 1 on success, or 0 on failure.

◆ gdWebpReadGetMetadata()

int gdWebpReadGetMetadata	(	gdWebpReadPtr	webp,
		gdImageMetadata *	metadata
	)

Extract opaque EXIF, XMP, and ICC metadata from a WebP reader.

Parameters

webp	The WebP reader.
metadata	Metadata object to populate.

Returns: GD_META_OK on success, or a GD_META_ERR_* value on failure.

◆ gdWebpReadNextFrame()

int gdWebpReadNextFrame	(	gdWebpReadPtr	webp,
		gdWebpFrameInfo *	info,
		gdImagePtr *	frame
	)

Read the next raw WebP animation frame rectangle.

When frame is not NULL and the function returns 1, *frame receives a caller-owned truecolor image that must be destroyed with gdImageDestroy. Passing NULL for frame advances the reader without returning the image.

Parameters

webp	WebP reader handle opened with raw-frame mode.
info	Pointer to a gdWebpFrameInfo structure to receive frame information, or NULL.
frame	Pointer to receive the caller-owned frame image, or NULL.

Returns: Returns 1 when a frame is read, 0 at end of animation, or -1 on error.

◆ gdWebpReadNextImage()

int gdWebpReadNextImage	(	gdWebpReadPtr	webp,
		gdWebpFrameInfo *	info,
		gdImagePtr *	image
	)

Read the next coalesced WebP animation image.

When image is not NULL and the function returns 1, *image receives a caller-owned truecolor full-canvas image that must be destroyed with gdImageDestroy. Passing NULL for image advances the reader without returning the image.

Parameters

webp	WebP reader handle.
info	Pointer to a gdWebpFrameInfo structure to receive frame information, or NULL.
image	Pointer to receive the caller-owned full-canvas image, or NULL.

Returns: Returns 1 when an image is read, 0 at end of animation, or -1 on error.

◆ gdWebpReadOpen()

gdWebpReadPtr gdWebpReadOpen	(	FILE *	fd,
		const gdWebpReadOptions *	options
	)

Open a WebP animation reader from a stdio file.

gdWebpReadOpen() reads the WebP data into the reader and does not close fd. Pass NULL for options to use gd defaults. The returned handle must be closed with gdWebpReadClose().

Parameters

fd	Pointer to the input FILE stream.
options	Pointer to read options, or NULL for defaults.

Returns: Returns a WebP reader handle on success, or NULL on failure.

◆ gdWebpReadOpenCtx()

gdWebpReadPtr gdWebpReadOpenCtx	(	gdIOCtxPtr	in,
		const gdWebpReadOptions *	options
	)

Open a WebP animation reader from a gdIOCtx.

gdWebpReadOpenCtx() reads the WebP data into the reader and does not close in. Pass NULL for options to use gd defaults. The returned handle must be closed with gdWebpReadClose().

Parameters

in	Pointer to the gdIOCtx input context.
options	Pointer to read options, or NULL for defaults.

Returns: Returns a WebP reader handle on success, or NULL on failure.

◆ gdWebpReadOpenPtr()

gdWebpReadPtr gdWebpReadOpenPtr	(	int	size,
		void *	data,
		const gdWebpReadOptions *	options
	)

Open a WebP animation reader from a memory buffer.

The data buffer is borrowed for the duration of the call. The returned handle owns its copy of the WebP data and must be closed with gdWebpReadClose(). Pass NULL for options to use gd defaults.

Parameters

size	Size of the WebP memory buffer in bytes.
data	Pointer to the WebP memory buffer.
options	Pointer to read options, or NULL for defaults.

Returns: Returns a WebP reader handle on success, or NULL on failure.

◆ gdWebpReadOptionsInit()

void gdWebpReadOptionsInit ( gdWebpReadOptions * options )

Initialize WebP multi-image/animation read options with gd defaults.

The default reader mode is coalesced, so gdWebpReadNextImage() returns full-canvas rendered images. Set gdWebpReadOptions::coalesced to zero before opening the reader to read raw frame rectangles with gdWebpReadNextFrame().

Parameters

options Pointer to the read options structure to initialize.

◆ gdWebpWriteAddImage()

int gdWebpWriteAddImage	(	gdWebpWritePtr	webp,
		gdImagePtr	image,
		int	durationMs
	)

Add an image to a WebP animation writer.

The image is borrowed for the duration of the call and remains owned by the caller. All frames must match the writer canvas size.

Parameters

webp	WebP writer handle.
image	Image to add as the next frame.
durationMs	Frame duration in milliseconds.

Returns: Returns 1 on success, or 0 on failure.

◆ gdWebpWriteClose()

void gdWebpWriteClose ( gdWebpWritePtr webp )

Finish, write, and close a WebP animation writer.

Use this for handles returned by gdWebpWriteOpen() or gdWebpWriteOpenCtx(). For memory writers returned by gdWebpWriteOpenPtr(), use gdWebpWritePtrFinish().

Parameters

webp	WebP writer handle to finish and close, or NULL.

◆ gdWebpWriteOpen()

gdWebpWritePtr gdWebpWriteOpen	(	FILE *	outFile,
		const gdWebpAnimWriteOptions *	options
	)

Open a WebP animation writer for a stdio file.

gdWebpWriteOpen() does not close outFile. The returned handle must be closed with gdWebpWriteClose(), which assembles and writes the animation.

Parameters

outFile	Pointer to the output FILE stream.
options	Pointer to write options, or NULL for defaults.

Returns: Returns a WebP writer handle on success, or NULL on failure.

◆ gdWebpWriteOpenCtx()

gdWebpWritePtr gdWebpWriteOpenCtx	(	gdIOCtxPtr	out,
		const gdWebpAnimWriteOptions *	options
	)

Open a WebP animation writer for a gdIOCtx.

The output context is borrowed and is not closed by gdWebpWriteClose(). The returned handle must be closed with gdWebpWriteClose(), which assembles and writes the animation.

Parameters

out	Pointer to the gdIOCtx output context.
options	Pointer to write options, or NULL for defaults.

Returns: Returns a WebP writer handle on success, or NULL on failure.

◆ gdWebpWriteOpenPtr()

gdWebpWritePtr gdWebpWriteOpenPtr ( const gdWebpAnimWriteOptions * options )

Open a WebP animation writer that returns a memory buffer.

The returned handle must be finished with gdWebpWritePtrFinish().

Parameters

options Pointer to write options, or NULL for defaults.

Returns: Returns a WebP memory writer handle on success, or NULL on failure.

◆ gdWebpWriteOptionsInit()

void gdWebpWriteOptionsInit ( gdWebpWriteOptions * options )

Initialize WebP still-image write options with gd defaults.

The default writer uses libwebp's default quality and writes no metadata.

Parameters

options Pointer to the write options structure to initialize.

◆ gdWebpWritePtrFinish()

void * gdWebpWritePtrFinish	(	gdWebpWritePtr	webp,
		int *	size
	)

Finish a WebP memory writer and return the encoded buffer.

This closes webp whether encoding succeeds or fails. The returned buffer is caller-owned and must be freed with gdFree().

Parameters

webp	WebP memory writer handle returned by gdWebpWriteOpenPtr().
size	Pointer to an integer that receives the returned buffer size.

Returns: Returns a pointer to the newly allocated WebP buffer, or NULL on failure.

Data Structures

Macros

Functions

WebP Types And Constants

Single-Image Reading

WebP Multi-Image/Animation Reading

WebP Multi-Image/Animation Writing

Detailed Description

Macro Definition Documentation

◆ gdWebpLossless

Typedef Documentation

◆ gdWebpReadPtr

◆ gdWebpWritePtr

Enumeration Type Documentation

◆ anonymous enum

◆ anonymous enum

Function Documentation

◆ gdImageCreateFromWebp()

◆ gdImageCreateFromWebpCtx()

◆ gdImageCreateFromWebpPtr()

◆ gdImageWebp()

◆ gdImageWebpCtx()

◆ gdImageWebpCtxWithOptions()

◆ gdImageWebpEx()

◆ gdImageWebpPtr()

◆ gdImageWebpPtrEx()

◆ gdImageWebpPtrWithOptions()

◆ gdImageWebpWithOptions()

◆ gdWebpAnimWriteOptionsInit()

◆ gdWebpIsAnimated()

◆ gdWebpIsAnimatedCtx()

◆ gdWebpIsAnimatedPtr()

◆ gdWebpReadClose()

◆ gdWebpReadGetInfo()

◆ gdWebpReadGetMetadata()

◆ gdWebpReadNextFrame()

◆ gdWebpReadNextImage()

◆ gdWebpReadOpen()

◆ gdWebpReadOpenCtx()

◆ gdWebpReadOpenPtr()

◆ gdWebpReadOptionsInit()

◆ gdWebpWriteAddImage()

◆ gdWebpWriteClose()

◆ gdWebpWriteOpen()

◆ gdWebpWriteOpenCtx()

◆ gdWebpWriteOpenPtr()

◆ gdWebpWriteOptionsInit()

◆ gdWebpWritePtrFinish()