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+<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>HEIF 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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+<div id=Content><div class="CFile"><div class=CTopic id=MainTopic><h1 class=CTitle><a name="HEIF_IO"></a>HEIF IO</h1><div class=CBody><p>Read and write HEIF images.</p><!--START_ND_SUMMARY--><div class=Summary><div class=STitle>Summary</div><div class=SBorder><table border=0 cellspacing=0 cellpadding=0 class=STable><tr class="SMain"><td class=SEntry><a href="#HEIF_IO" >HEIF IO</a></td><td class=SDescription>Read and write HEIF images.</td></tr><tr class="SGroup"><td class=SEntry><a href="#Functions" >Functions</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent1 SMarked"><td class=SEntry><a href="#gdImageCreateFromHeif" id=link1 onMouseOver="ShowTip(event, 'tt1', 'link1')" onMouseOut="HideTip('tt1')">gdImageCreateFromHeif</a></td><td class=SDescription><a href="#gdImageCreateFromHeif" class=LFunction id=link2 onMouseOver="ShowTip(event, 'tt1', 'link2')" onMouseOut="HideTip('tt1')">gdImageCreateFromHeif</a> is called to load truecolor images from HEIF format files. </td></tr><tr class="SFunction SIndent1"><td class=SEntry><a href="#gdImageCreateFromHeifPtr" id=link3 onMouseOver="ShowTip(event, 'tt2', 'link3')" onMouseOut="HideTip('tt2')">gdImageCreateFromHeifPtr</a></td><td class=SDescription>See <a href="#gdImageCreateFromHeif" class=LFunction id=link4 onMouseOver="ShowTip(event, 'tt1', 'link4')" onMouseOut="HideTip('tt1')">gdImageCreateFromHeif</a>.</td></tr><tr class="SFunction SIndent1 SMarked"><td class=SEntry><a href="#gdImageCreateFromHeifCtx" id=link5 onMouseOver="ShowTip(event, 'tt3', 'link5')" onMouseOut="HideTip('tt3')">gdImageCreateFromHeifCtx</a></td><td class=SDescription>See <a href="#gdImageCreateFromHeif" class=LFunction id=link6 onMouseOver="ShowTip(event, 'tt1', 'link6')" onMouseOut="HideTip('tt1')">gdImageCreateFromHeif</a>.</td></tr><tr class="SFunction SIndent1"><td class=SEntry><a href="#gdImageHeifCtx" id=link7 onMouseOver="ShowTip(event, 'tt4', 'link7')" onMouseOut="HideTip('tt4')">gdImageHeifCtx</a></td><td class=SDescription>Write the image as HEIF data via a <a href="gd_io-h.html#gdIOCtx" class=LType id=link8 onMouseOver="ShowTip(event, 'tt5', 'link8')" onMouseOut="HideTip('tt5')">gdIOCtx</a>. </td></tr><tr class="SFunction SIndent1 SMarked"><td class=SEntry><a href="#gdImageHeifEx" id=link9 onMouseOver="ShowTip(event, 'tt6', 'link9')" onMouseOut="HideTip('tt6')">gdImageHeifEx</a></td><td class=SDescription><a href="#gdImageHeifEx" class=LFunction id=link10 onMouseOver="ShowTip(event, 'tt6', 'link10')" onMouseOut="HideTip('tt6')">gdImageHeifEx</a> outputs the specified image to the specified file in HEIF format. </td></tr><tr class="SFunction SIndent1"><td class=SEntry><a href="#gdImageHeif" id=link11 onMouseOver="ShowTip(event, 'tt7', 'link11')" onMouseOut="HideTip('tt7')">gdImageHeif</a></td><td class=SDescription>Variant of <a href="#gdImageHeifEx" class=LFunction id=link12 onMouseOver="ShowTip(event, 'tt6', 'link12')" onMouseOut="HideTip('tt6')">gdImageHeifEx</a> which uses the default quality (-1), the default codec (GD_HEIF_Codec_HEVC) and the default chroma subsampling (GD_HEIF_CHROMA_444).</td></tr><tr class="SFunction SIndent1 SMarked"><td class=SEntry><a href="#gdImageHeifPtr" id=link13 onMouseOver="ShowTip(event, 'tt8', 'link13')" onMouseOut="HideTip('tt8')">gdImageHeifPtr</a></td><td class=SDescription>See <a href="#gdImageHeifEx" class=LFunction id=link14 onMouseOver="ShowTip(event, 'tt6', 'link14')" onMouseOut="HideTip('tt6')">gdImageHeifEx</a>.</td></tr><tr class="SFunction SIndent1"><td class=SEntry><a href="#gdImageHeifPtrEx" id=link15 onMouseOver="ShowTip(event, 'tt9', 'link15')" onMouseOut="HideTip('tt9')">gdImageHeifPtrEx</a></td><td class=SDescription>See <a href="#gdImageHeifEx" class=LFunction id=link16 onMouseOver="ShowTip(event, 'tt6', 'link16')" onMouseOut="HideTip('tt6')">gdImageHeifEx</a>.</td></tr></table></div></div><!--END_ND_SUMMARY--></div></div></div>
+
+<div class="CGroup"><div class=CTopic><h3 class=CTitle><a name="Functions"></a>Functions</h3></div></div>
+
+<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="gdImageCreateFromHeif"></a>gdImageCreateFromHeif</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>gdImagePtr gdImageCreateFromHeif(</td><td class="PType prettyprint " nowrap>FILE&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap>*</td><td class="PParameter prettyprint " nowrap>inFile</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p><a href="#gdImageCreateFromHeif" class=LFunction id=link17 onMouseOver="ShowTip(event, 'tt1', 'link17')" onMouseOut="HideTip('tt1')">gdImageCreateFromHeif</a> is called to load truecolor images from HEIF format files.&nbsp; Invoke <a href="#gdImageCreateFromHeif" class=LFunction id=link18 onMouseOver="ShowTip(event, 'tt1', 'link18')" onMouseOut="HideTip('tt1')">gdImageCreateFromHeif</a> with an already opened pointer to a file containing the desired image.&nbsp; <a href="#gdImageCreateFromHeif" class=LFunction id=link19 onMouseOver="ShowTip(event, 'tt1', 'link19')" onMouseOut="HideTip('tt1')">gdImageCreateFromHeif</a> returns a <a href="gd-h.html#gdImagePtr" class=LType id=link20 onMouseOver="ShowTip(event, 'tt10', 'link20')" onMouseOut="HideTip('tt10')">gdImagePtr</a> 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 HEIF image).&nbsp; <a href="#gdImageCreateFromHeif" class=LFunction id=link21 onMouseOver="ShowTip(event, 'tt1', 'link21')" onMouseOut="HideTip('tt1')">gdImageCreateFromHeif</a> does not close the file.</p><p>You can inspect the sx and sy members of the image to determine its size.&nbsp; The image must eventually be destroyed using <a href="gd-c.html#gdImageDestroy" class=LFunction id=link22 onMouseOver="ShowTip(event, 'tt11', 'link22')" onMouseOut="HideTip('tt11')">gdImageDestroy</a>.</p><p><b>The returned image is always a truecolor image.</b></p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>infile</td><td class=CDLDescription>The input FILE pointer.</td></tr></table><h4 class=CHeading>Returns</h4><p>A pointer to the new <b>truecolor</b> image.&nbsp; This will need to be destroyed with <a href="gd-c.html#gdImageDestroy" class=LFunction id=link23 onMouseOver="ShowTip(event, 'tt11', 'link23')" onMouseOut="HideTip('tt11')">gdImageDestroy</a> once it is no longer needed.</p><p>On error, returns NULL.</p></div></div></div>
+
+<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="gdImageCreateFromHeifPtr"></a>gdImageCreateFromHeifPtr</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>gdImagePtr gdImageCreateFromHeifPtr(</td><td class="PType prettyprint " nowrap>int&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>size,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>void&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap>*</td><td class="PParameter prettyprint " nowrap>data</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>See <a href="#gdImageCreateFromHeif" class=LFunction id=link24 onMouseOver="ShowTip(event, 'tt1', 'link24')" onMouseOut="HideTip('tt1')">gdImageCreateFromHeif</a>.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>size</td><td class=CDLDescription>size of HEIF data in bytes.</td></tr><tr><td class=CDLEntry>data</td><td class=CDLDescription>pointer to HEIF data.</td></tr></table></div></div></div>
+
+<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="gdImageCreateFromHeifCtx"></a>gdImageCreateFromHeifCtx</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>gdImagePtr gdImageCreateFromHeifCtx(</td><td class="PType prettyprint " nowrap>gdIOCtx&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap>*</td><td class="PParameter prettyprint " nowrap>infile</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>See <a href="#gdImageCreateFromHeif" class=LFunction id=link25 onMouseOver="ShowTip(event, 'tt1', 'link25')" onMouseOut="HideTip('tt1')">gdImageCreateFromHeif</a>.</p></div></div></div>
+
+<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="gdImageHeifCtx"></a>gdImageHeifCtx</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>void gdImageHeifCtx(</td><td class="PType prettyprint " nowrap>gdImagePtr&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>im,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>gdIOCtx&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap>*</td><td class="PParameter prettyprint " nowrap>outfile,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>int&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>quality,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>gdHeifCodec&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>codec,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>gdHeifChroma&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>chroma</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Write the image as HEIF data via a <a href="gd_io-h.html#gdIOCtx" class=LType id=link26 onMouseOver="ShowTip(event, 'tt5', 'link26')" onMouseOut="HideTip('tt5')">gdIOCtx</a>.&nbsp; See <a href="#gdImageHeifEx" class=LFunction id=link27 onMouseOver="ShowTip(event, 'tt6', 'link27')" onMouseOut="HideTip('tt6')">gdImageHeifEx</a> for more details.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>im</td><td class=CDLDescription>The image to write.</td></tr><tr><td class=CDLEntry>outfile</td><td class=CDLDescription>The output sink.</td></tr><tr><td class=CDLEntry>quality</td><td class=CDLDescription>Image quality.</td></tr><tr><td class=CDLEntry>codec</td><td class=CDLDescription>The output coding format.</td></tr><tr><td class=CDLEntry>chroma</td><td class=CDLDescription>The output chroma subsampling format.</td></tr></table><h4 class=CHeading>Returns</h4><p>Nothing.</p></div></div></div>
+
+<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="gdImageHeifEx"></a>gdImageHeifEx</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>void gdImageHeifEx(</td><td class="PType prettyprint " nowrap>gdImagePtr&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>im,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>FILE&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap>*</td><td class="PParameter prettyprint " nowrap>outFile,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>int&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>quality,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>gdHeifCodec&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>codec,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>gdHeifChroma&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>chroma</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p><a href="#gdImageHeifEx" class=LFunction id=link28 onMouseOver="ShowTip(event, 'tt6', 'link28')" onMouseOut="HideTip('tt6')">gdImageHeifEx</a> outputs the specified image to the specified file in HEIF format.&nbsp; The file must be open for writing.&nbsp; Under MSDOS and all versions of Windows, it is important to use &ldquo;wb&rdquo; as opposed to simply &ldquo;w&rdquo; as the mode when opening the file, and under Unix there is no penalty for doing so.&nbsp; <a href="#gdImageHeifEx" class=LFunction id=link29 onMouseOver="ShowTip(event, 'tt6', 'link29')" onMouseOut="HideTip('tt6')">gdImageHeifEx</a> does not close the file; your code must do so.</p><p>If <u>quality</u> is -1, a reasonable quality value (which should yield a good general quality / size tradeoff for most situations) is used.&nbsp; 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 or 200, for lossless codec.</p><h4 class=CHeading>Variants</h4><p><a href="#gdImageHeifCtx" class=LFunction id=link30 onMouseOver="ShowTip(event, 'tt4', 'link30')" onMouseOut="HideTip('tt4')">gdImageHeifCtx</a> stores the image using a <a href="gd_io-h.html#gdIOCtx" class=LType id=link31 onMouseOver="ShowTip(event, 'tt5', 'link31')" onMouseOut="HideTip('tt5')">gdIOCtx</a> struct.</p><p><a href="#gdImageHeifPtrEx" class=LFunction id=link32 onMouseOver="ShowTip(event, 'tt9', 'link32')" onMouseOut="HideTip('tt9')">gdImageHeifPtrEx</a> stores the image to RAM.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>im</td><td class=CDLDescription>The image to save.</td></tr><tr><td class=CDLEntry>outFile</td><td class=CDLDescription>The FILE pointer to write to.</td></tr><tr><td class=CDLEntry>quality</td><td class=CDLDescription>Codec quality (0-100).</td></tr><tr><td class=CDLEntry>codec</td><td class=CDLDescription>The output coding format.</td></tr><tr><td class=CDLEntry>chroma</td><td class=CDLDescription>The output chroma subsampling format.</td></tr></table><h4 class=CHeading>Returns</h4><p>Nothing.</p></div></div></div>
+
+<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="gdImageHeif"></a>gdImageHeif</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>void gdImageHeif(</td><td class="PType prettyprint " nowrap>gdImagePtr&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>im,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>FILE&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap>*</td><td class="PParameter prettyprint " nowrap>outFile</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Variant of <a href="#gdImageHeifEx" class=LFunction id=link33 onMouseOver="ShowTip(event, 'tt6', 'link33')" onMouseOut="HideTip('tt6')">gdImageHeifEx</a> which uses the default quality (-1), the default codec (GD_HEIF_Codec_HEVC) and the default chroma subsampling (GD_HEIF_CHROMA_444).</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>im</td><td class=CDLDescription>The image to save</td></tr><tr><td class=CDLEntry>outFile</td><td class=CDLDescription>The FILE pointer to write to.</td></tr></table><h4 class=CHeading>Returns</h4><p>Nothing.</p></div></div></div>
+
+<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="gdImageHeifPtr"></a>gdImageHeifPtr</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>void * gdImageHeifPtr(</td><td class="PType prettyprint " nowrap>gdImagePtr&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>im,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>int&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap>*</td><td class="PParameter prettyprint " nowrap>size</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>See <a href="#gdImageHeifEx" class=LFunction id=link34 onMouseOver="ShowTip(event, 'tt6', 'link34')" onMouseOut="HideTip('tt6')">gdImageHeifEx</a>.</p></div></div></div>
+
+<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="gdImageHeifPtrEx"></a>gdImageHeifPtrEx</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>void * gdImageHeifPtrEx(</td><td class="PType prettyprint " nowrap>gdImagePtr&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>im,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>int&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap>*</td><td class="PParameter prettyprint " nowrap>size,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>int&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>quality,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>gdHeifCodec&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>codec,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>gdHeifChroma&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>chroma</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>See <a href="#gdImageHeifEx" class=LFunction id=link35 onMouseOver="ShowTip(event, 'tt6', 'link35')" onMouseOut="HideTip('tt6')">gdImageHeifEx</a>.</p></div></div></div>
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+<div class=CToolTip id="tt1"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>gdImagePtr gdImageCreateFromHeif(</td><td class="PType prettyprint " nowrap>FILE&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap>*</td><td class="PParameter prettyprint " nowrap>inFile</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>gdImageCreateFromHeif is called to load truecolor images from HEIF format files. </div></div><div class=CToolTip id="tt2"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>gdImagePtr gdImageCreateFromHeifPtr(</td><td class="PType prettyprint " nowrap>int&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>size,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>void&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap>*</td><td class="PParameter prettyprint " nowrap>data</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>See gdImageCreateFromHeif.</div></div><div class=CToolTip id="tt3"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>gdImagePtr gdImageCreateFromHeifCtx(</td><td class="PType prettyprint " nowrap>gdIOCtx&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap>*</td><td class="PParameter prettyprint " nowrap>infile</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>See gdImageCreateFromHeif.</div></div><div class=CToolTip id="tt4"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>void gdImageHeifCtx(</td><td class="PType prettyprint " nowrap>gdImagePtr&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>im,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>gdIOCtx&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap>*</td><td class="PParameter prettyprint " nowrap>outfile,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>int&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>quality,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>gdHeifCodec&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>codec,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>gdHeifChroma&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>chroma</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Write the image as HEIF data via a gdIOCtx. </div></div><div class=CToolTip id="tt5"><div class=CType>gdIOCtx structures hold function pointers for doing image IO.</div></div><div class=CToolTip id="tt6"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>void gdImageHeifEx(</td><td class="PType prettyprint " nowrap>gdImagePtr&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>im,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>FILE&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap>*</td><td class="PParameter prettyprint " nowrap>outFile,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>int&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>quality,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>gdHeifCodec&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>codec,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>gdHeifChroma&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>chroma</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>gdImageHeifEx outputs the specified image to the specified file in HEIF format. </div></div><div class=CToolTip id="tt7"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>void gdImageHeif(</td><td class="PType prettyprint " nowrap>gdImagePtr&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>im,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>FILE&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap>*</td><td class="PParameter prettyprint " nowrap>outFile</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Variant of gdImageHeifEx which uses the default quality (-1), the default codec (GD_HEIF_Codec_HEVC) and the default chroma subsampling (GD_HEIF_CHROMA_444).</div></div><div class=CToolTip id="tt8"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>void * gdImageHeifPtr(</td><td class="PType prettyprint " nowrap>gdImagePtr&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>im,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>int&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap>*</td><td class="PParameter prettyprint " nowrap>size</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>See gdImageHeifEx.</div></div><div class=CToolTip id="tt9"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>void * gdImageHeifPtrEx(</td><td class="PType prettyprint " nowrap>gdImagePtr&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>im,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>int&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap>*</td><td class="PParameter prettyprint " nowrap>size,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>int&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>quality,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>gdHeifCodec&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>codec,</td></tr><tr><td></td><td class="PType prettyprint " nowrap>gdHeifChroma&nbsp;</td><td class="PParameterPrefix prettyprint " nowrap></td><td class="PParameter prettyprint " nowrap>chroma</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>See gdImageHeifEx.</div></div><div class=CToolTip id="tt10"><div class=CType>The data structure in which gd stores images. </div></div><div class=CToolTip id="tt11"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>void gdImageDestroy (</td><td class="PType prettyprint " nowrap>gdImagePtr&nbsp;</td><td class="PParameter prettyprint " nowrap>im</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>gdImageDestroy is used to free the memory associated with an image. </div></div><!--END_ND_TOOLTIPS-->
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