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&#160;<span id="projectnumber">v0.15</span>
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<a href="#pub-methods">Public Member Functions</a> &#124;
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<div class="title">GlCanvas<span class="mlabels"><span class="mlabel">final</span></span><div class="ingroups"><a class="el" href="group__ThorVG.html">ThorVG</a></div></div> </div>
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<p>A class for the rendering graphic elements with a GL raster engine.
<a href="classtvg_1_1GlCanvas.html#details">More...</a></p>
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Inheritance diagram for GlCanvas:</div>
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Collaboration diagram for GlCanvas:</div>
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<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:a182ae193566dbc09fc2ec5a369ad38ad"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__ThorVG.html#ga28287671eaf7406afd604bd055ba4066">Result</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classtvg_1_1GlCanvas.html#a182ae193566dbc09fc2ec5a369ad38ad">target</a> (int32_t id, uint32_t w, uint32_t h) noexcept</td></tr>
<tr class="memdesc:a182ae193566dbc09fc2ec5a369ad38ad"><td class="mdescLeft">&#160;</td><td class="mdescRight">Sets the drawing target for rasterization. <a href="classtvg_1_1GlCanvas.html#a182ae193566dbc09fc2ec5a369ad38ad">More...</a><br /></td></tr>
<tr class="separator:a182ae193566dbc09fc2ec5a369ad38ad"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="inherit_header pub_methods_classtvg_1_1Canvas"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classtvg_1_1Canvas')"><img src="closed.png" alt="-"/>&#160;Public Member Functions inherited from <a class="el" href="classtvg_1_1Canvas.html">Canvas</a></td></tr>
<tr class="memitem:ace6c268f853a4c144076de89b7bbbe75 inherit pub_methods_classtvg_1_1Canvas"><td class="memItemLeft" align="right" valign="top">std::list&lt; <a class="el" href="classtvg_1_1Paint.html">Paint</a> * &gt; &amp;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classtvg_1_1Canvas.html#ace6c268f853a4c144076de89b7bbbe75">paints</a> () noexcept</td></tr>
<tr class="memdesc:ace6c268f853a4c144076de89b7bbbe75 inherit pub_methods_classtvg_1_1Canvas"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the list of the paints that currently held by the <a class="el" href="classtvg_1_1Canvas.html" title="An abstract class for drawing graphical elements.">Canvas</a>. <a href="classtvg_1_1Canvas.html#ace6c268f853a4c144076de89b7bbbe75">More...</a><br /></td></tr>
<tr class="separator:ace6c268f853a4c144076de89b7bbbe75 inherit pub_methods_classtvg_1_1Canvas"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a82c5ec1c1ba93cf7671642400074201e inherit pub_methods_classtvg_1_1Canvas"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="group__ThorVG.html#ga28287671eaf7406afd604bd055ba4066">Result</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classtvg_1_1Canvas.html#a82c5ec1c1ba93cf7671642400074201e">push</a> (std::unique_ptr&lt; <a class="el" href="classtvg_1_1Paint.html">Paint</a> &gt; paint) noexcept</td></tr>
<tr class="memdesc:a82c5ec1c1ba93cf7671642400074201e inherit pub_methods_classtvg_1_1Canvas"><td class="mdescLeft">&#160;</td><td class="mdescRight">Passes drawing elements to the <a class="el" href="classtvg_1_1Canvas.html" title="An abstract class for drawing graphical elements.">Canvas</a> using <a class="el" href="classtvg_1_1Paint.html" title="An abstract class for managing graphical elements.">Paint</a> objects. <a href="classtvg_1_1Canvas.html#a82c5ec1c1ba93cf7671642400074201e">More...</a><br /></td></tr>
<tr class="separator:a82c5ec1c1ba93cf7671642400074201e inherit pub_methods_classtvg_1_1Canvas"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a99cdb01cd893f4199b521b754d21aefd inherit pub_methods_classtvg_1_1Canvas"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="group__ThorVG.html#ga28287671eaf7406afd604bd055ba4066">Result</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classtvg_1_1Canvas.html#a99cdb01cd893f4199b521b754d21aefd">clear</a> (bool free=true) noexcept</td></tr>
<tr class="memdesc:a99cdb01cd893f4199b521b754d21aefd inherit pub_methods_classtvg_1_1Canvas"><td class="mdescLeft">&#160;</td><td class="mdescRight">Clear the internal canvas resources that used for the drawing. <a href="classtvg_1_1Canvas.html#a99cdb01cd893f4199b521b754d21aefd">More...</a><br /></td></tr>
<tr class="separator:a99cdb01cd893f4199b521b754d21aefd inherit pub_methods_classtvg_1_1Canvas"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a89ac8a85a8c22723af9fb07c098472b3 inherit pub_methods_classtvg_1_1Canvas"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="group__ThorVG.html#ga28287671eaf7406afd604bd055ba4066">Result</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classtvg_1_1Canvas.html#a89ac8a85a8c22723af9fb07c098472b3">update</a> (<a class="el" href="classtvg_1_1Paint.html">Paint</a> *paint=nullptr) noexcept</td></tr>
<tr class="memdesc:a89ac8a85a8c22723af9fb07c098472b3 inherit pub_methods_classtvg_1_1Canvas"><td class="mdescLeft">&#160;</td><td class="mdescRight">Request the canvas to update the paint objects. <a href="classtvg_1_1Canvas.html#a89ac8a85a8c22723af9fb07c098472b3">More...</a><br /></td></tr>
<tr class="separator:a89ac8a85a8c22723af9fb07c098472b3 inherit pub_methods_classtvg_1_1Canvas"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aabf9e5a14da3b4bfd5883c2b4459abd0 inherit pub_methods_classtvg_1_1Canvas"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="group__ThorVG.html#ga28287671eaf7406afd604bd055ba4066">Result</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classtvg_1_1Canvas.html#aabf9e5a14da3b4bfd5883c2b4459abd0">draw</a> () noexcept</td></tr>
<tr class="memdesc:aabf9e5a14da3b4bfd5883c2b4459abd0 inherit pub_methods_classtvg_1_1Canvas"><td class="mdescLeft">&#160;</td><td class="mdescRight">Requests the canvas to draw the <a class="el" href="classtvg_1_1Paint.html" title="An abstract class for managing graphical elements.">Paint</a> objects. <a href="classtvg_1_1Canvas.html#aabf9e5a14da3b4bfd5883c2b4459abd0">More...</a><br /></td></tr>
<tr class="separator:aabf9e5a14da3b4bfd5883c2b4459abd0 inherit pub_methods_classtvg_1_1Canvas"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a2172bfc1790cee5dedd9cda7a2caf64e inherit pub_methods_classtvg_1_1Canvas"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="group__ThorVG.html#ga28287671eaf7406afd604bd055ba4066">Result</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classtvg_1_1Canvas.html#a2172bfc1790cee5dedd9cda7a2caf64e">viewport</a> (int32_t x, int32_t y, int32_t w, int32_t h) noexcept</td></tr>
<tr class="memdesc:a2172bfc1790cee5dedd9cda7a2caf64e inherit pub_methods_classtvg_1_1Canvas"><td class="mdescLeft">&#160;</td><td class="mdescRight">Sets the drawing region in the canvas. <a href="classtvg_1_1Canvas.html#a2172bfc1790cee5dedd9cda7a2caf64e">More...</a><br /></td></tr>
<tr class="separator:a2172bfc1790cee5dedd9cda7a2caf64e inherit pub_methods_classtvg_1_1Canvas"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:adbca600af79f9a0b8e8366e3be7450e9 inherit pub_methods_classtvg_1_1Canvas"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="group__ThorVG.html#ga28287671eaf7406afd604bd055ba4066">Result</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classtvg_1_1Canvas.html#adbca600af79f9a0b8e8366e3be7450e9">sync</a> () noexcept</td></tr>
<tr class="memdesc:adbca600af79f9a0b8e8366e3be7450e9 inherit pub_methods_classtvg_1_1Canvas"><td class="mdescLeft">&#160;</td><td class="mdescRight">Guarantees that drawing task is finished. <a href="classtvg_1_1Canvas.html#adbca600af79f9a0b8e8366e3be7450e9">More...</a><br /></td></tr>
<tr class="separator:adbca600af79f9a0b8e8366e3be7450e9 inherit pub_methods_classtvg_1_1Canvas"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-static-methods"></a>
Static Public Member Functions</h2></td></tr>
<tr class="memitem:ad6ae7e14a4f29b7ae78ad5b92350cf90"><td class="memItemLeft" align="right" valign="top">static std::unique_ptr&lt; <a class="el" href="classtvg_1_1GlCanvas.html">GlCanvas</a> &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classtvg_1_1GlCanvas.html#ad6ae7e14a4f29b7ae78ad5b92350cf90">gen</a> () noexcept</td></tr>
<tr class="memdesc:ad6ae7e14a4f29b7ae78ad5b92350cf90"><td class="mdescLeft">&#160;</td><td class="mdescRight">Creates a new <a class="el" href="classtvg_1_1GlCanvas.html" title="A class for the rendering graphic elements with a GL raster engine.">GlCanvas</a> object. <a href="classtvg_1_1GlCanvas.html#ad6ae7e14a4f29b7ae78ad5b92350cf90">More...</a><br /></td></tr>
<tr class="separator:ad6ae7e14a4f29b7ae78ad5b92350cf90"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>A class for the rendering graphic elements with a GL raster engine. </p>
<dl class="section since"><dt>Since</dt><dd>0.14 </dd></dl>
</div><h2 class="groupheader">Member Function Documentation</h2>
<a id="ad6ae7e14a4f29b7ae78ad5b92350cf90"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ad6ae7e14a4f29b7ae78ad5b92350cf90">&#9670;&nbsp;</a></span>gen()</h2>
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<table class="memname">
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<td class="memname">static std::unique_ptr&lt;<a class="el" href="classtvg_1_1GlCanvas.html">GlCanvas</a>&gt; gen </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td></td>
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</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">static</span><span class="mlabel">noexcept</span></span> </td>
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<p>Creates a new <a class="el" href="classtvg_1_1GlCanvas.html" title="A class for the rendering graphic elements with a GL raster engine.">GlCanvas</a> object. </p>
<dl class="section return"><dt>Returns</dt><dd>A new <a class="el" href="classtvg_1_1GlCanvas.html" title="A class for the rendering graphic elements with a GL raster engine.">GlCanvas</a> object.</dd></dl>
<dl class="section since"><dt>Since</dt><dd>0.14 </dd></dl>
</div>
</div>
<a id="a182ae193566dbc09fc2ec5a369ad38ad"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a182ae193566dbc09fc2ec5a369ad38ad">&#9670;&nbsp;</a></span>target()</h2>
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<td class="mlabels-left">
<table class="memname">
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<td class="memname"><a class="el" href="group__ThorVG.html#ga28287671eaf7406afd604bd055ba4066">Result</a> target </td>
<td>(</td>
<td class="paramtype">int32_t&#160;</td>
<td class="paramname"><em>id</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint32_t&#160;</td>
<td class="paramname"><em>w</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint32_t&#160;</td>
<td class="paramname"><em>h</em>&#160;</td>
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<td></td>
<td>)</td>
<td></td><td></td>
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</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">noexcept</span></span> </td>
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<p>Sets the drawing target for rasterization. </p>
<p>This function specifies the drawing target where the rasterization will occur. It can target a specific framebuffer object (FBO) or the main surface.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">id</td><td>The GL target ID, usually indicating the FBO ID. A value of <code>0</code> specifies the main surface. </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">w</td><td>The width (in pixels) of the raster image. </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">h</td><td>The height (in pixels) of the raster image.</td></tr>
</table>
</dd>
</dl>
<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname"><a class="el" href="group__ThorVG.html#gga28287671eaf7406afd604bd055ba4066a119732ff568bf103d744e930ae2404f1" title="The value returned in case the request cannot be processed - e.g. asking for properties of an object,...">Result::InsufficientCondition</a></td><td>if the canvas is performing rendering. Please ensure the canvas is synced. </td></tr>
<tr><td class="paramname"><a class="el" href="group__ThorVG.html#gga28287671eaf7406afd604bd055ba4066aa0cfd518e4385f31d38720579321ed29" title="The value returned in case of choosing unsupported engine features(options).">Result::NonSupport</a></td><td>In case the gl engine is not supported.</td></tr>
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</dd>
</dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="classtvg_1_1Canvas.html#a2172bfc1790cee5dedd9cda7a2caf64e" title="Sets the drawing region in the canvas.">Canvas::viewport()</a> </dd>
<dd>
<a class="el" href="classtvg_1_1Canvas.html#adbca600af79f9a0b8e8366e3be7450e9" title="Guarantees that drawing task is finished.">Canvas::sync()</a></dd></dl>
<dl class="section note"><dt>Note</dt><dd>Currently, this only allows the GL_RGBA8 color space format. </dd>
<dd>
Experimental API </dd></dl>
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