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<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>WebP IO</title><link rel="stylesheet" type="text/css" href="../styles/main.css"><script language=JavaScript src="../javascript/main.js"></script><script language=JavaScript src="../javascript/prettify.js"></script><script language=JavaScript src="../javascript/searchdata.js"></script></head><body class="ContentPage" onLoad="NDOnLoad();prettyPrint();"><script language=JavaScript>
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if (browserType) {document.write("
");if (browserVer) {document.write("
"); }}// --></script>
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WebP IO
Read and write WebP images.
Summary
WebP IORead and write WebP images.
Functions
gdImageCreateFromWebpgdImageCreateFromWebp is called to load truecolor images from WebP format files. 
gdImageCreateFromWebpPtrSee gdImageCreateFromWebp.
gdImageCreateFromWebpCtxSee gdImageCreateFromWebp.
gdImageWebpCtxWrite the image as WebP data via a gdIOCtx. 
gdImageWebpExgdImageWebpEx outputs the specified image to the specified file in WebP format. 
gdImageWebpVariant of gdImageWebpEx which uses the default quality (-1).
gdImageWebpPtrSee gdImageWebpEx.
gdImageWebpPtrExSee gdImageWebpEx.
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Functions
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gdImageCreateFromWebp
gdImagePtr gdImageCreateFromWebp (FILE *inFile)
gdImageCreateFromWebp is called to load truecolor images from WebP format files.  Invoke gdImageCreateFromWebp with an already opened pointer to a file containing the desired image.  gdImageCreateFromWebp returns a gdImagePtr to the new truecolor image, or NULL if unable to load the image (most often because the file is corrupt or does not contain a WebP image).  gdImageCreateFromWebp does not close the file.
You can inspect the sx and sy members of the image to determine its size.  The image must eventually be destroyed using gdImageDestroy.
The returned image is always a truecolor image.
Variants
gdImageCreateFromJpegPtr creates an image from WebP data already in memory.
gdImageCreateFromJpegCtx reads its data via the function pointers in a gdIOCtx structure.
Parameters
infileThe input FILE pointer.
Returns
A pointer to the new truecolor image.   This will need to be destroyed with gdImageDestroy once it is no longer needed.
On error, returns NULL.
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gdImageCreateFromWebpPtr
gdImagePtr gdImageCreateFromWebpPtr (int size,
void *data)
See gdImageCreateFromWebp.
Parameters
sizesize of WebP data in bytes.
datapointer to WebP data.
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gdImageCreateFromWebpCtx
gdImagePtr gdImageCreateFromWebpCtx (gdIOCtx *infile)
See gdImageCreateFromWebp.
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gdImageWebpCtx
void gdImageWebpCtx (gdImagePtr im,
gdIOCtx *outfile,
int quality)
Write the image as WebP data via a gdIOCtx.  See gdImageWebpEx for more details.
Parameters
imThe image to write.
outfileThe output sink.
qualityImage quality.
Returns
Nothing.
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gdImageWebpEx
void gdImageWebpEx (gdImagePtr im,
FILE *outFile,
int quality)
gdImageWebpEx outputs the specified image to the specified file in WebP format.  The file must be open for writing.  Under MSDOS and all versions of Windows, it is important to use “wb” as opposed to simply “w” as the mode when opening the file, and under Unix there is no penalty for doing so.  gdImageWebpEx does not close the file; your code must do so.
If <u>quality</u> is -1, a reasonable quality value (which should yield a good general quality / size tradeoff for most situations) is used.  Otherwise <u>quality</u> should be a value in the range 0-100, higher quality values usually implying both higher quality and larger image sizes.
Variants
gdImageWebpCtx stores the image using a gdIOCtx struct.
gdImageWebpPtrEx stores the image to RAM.
Parameters
imThe image to save.
outFileThe FILE pointer to write to.
qualityCompression quality (0-100).
Returns
Nothing.
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gdImageWebp
void gdImageWebp (gdImagePtr im,
FILE *outFile)
Variant of gdImageWebpEx which uses the default quality (-1).
Parameters
imThe image to save
outFileThe FILE pointer to write to.
Returns
Nothing.
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gdImageWebpPtr
void * gdImageWebpPtr (gdImagePtr im,
int *size)
See gdImageWebpEx.
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gdImageWebpPtrEx
void * gdImageWebpPtrEx (gdImagePtr im,
int *size,
int quality)
See gdImageWebpEx.
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var searchPanel = new SearchPanel("searchPanel", "HTML", "../search");
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--></script>
<input type=text id=MSearchField value=Search onFocus="searchPanel.OnSearchFieldFocus(true)" onBlur="searchPanel.OnSearchFieldFocus(false)" onKeyUp="searchPanel.OnSearchFieldChange()"><select id=MSearchType onFocus="searchPanel.OnSearchTypeFocus(true)" onBlur="searchPanel.OnSearchTypeFocus(false)" onChange="searchPanel.OnSearchTypeChange()"><option  id=MSearchEverything selected value="General">Everything</option><option value="Constants">Constants</option><option value="Files">Files</option><option value="Functions">Functions</option><option value="Macros">Macros</option><option value="Types">Types</option></select>
<script language=JavaScript>
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HideAllBut([1], 4);// --></script>
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gdImagePtr gdImageCreateFromWebp (FILE *inFile)
gdImageCreateFromWebp is called to load truecolor images from WebP format files. 
gdImagePtr gdImageCreateFromWebpPtr (int size,
void *data)
See gdImageCreateFromWebp.
gdImagePtr gdImageCreateFromWebpCtx (gdIOCtx *infile)
See gdImageCreateFromWebp.
void gdImageWebpCtx (gdImagePtr im,
gdIOCtx *outfile,
int quality)
Write the image as WebP data via a gdIOCtx. 
gdIOCtx structures hold function pointers for doing image IO.
void gdImageWebpEx (gdImagePtr im,
FILE *outFile,
int quality)
gdImageWebpEx outputs the specified image to the specified file in WebP format. 
void gdImageWebp (gdImagePtr im,
FILE *outFile)
Variant of gdImageWebpEx which uses the default quality (-1).
void * gdImageWebpPtr (gdImagePtr im,
int *size)
See gdImageWebpEx.
void * gdImageWebpPtrEx (gdImagePtr im,
int *size,
int quality)
See gdImageWebpEx.
The data structure in which gd stores images. 
void gdImageDestroy (gdImagePtr im)
gdImageDestroy is used to free the memory associated with an image. 
gdImagePtr gdImageCreateFromJpegPtr(int size,
void *data)
gdImagePtr gdImageCreateFromJpegCtx(gdIOCtx *infile)
See gdImageCreateFromJpeg.
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<iframe src="" frameborder=0 name=MSearchResults id=MSearchResults></iframe>Close
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<script language=JavaScript>
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if (browserType) {if (browserVer) {document.write(""); }document.write("");}// --></script></body></html>

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