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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/207632">207632</a></dd>
<dt>Author</dt> <dd>mmaxfield@apple.com</dd>
<dt>Date</dt> <dd>2016-10-20 12:17:06 -0700 (Thu, 20 Oct 2016)</dd>
</dl>

<h3>Log Message</h3>
<pre>Improve error message when passing a null ArrayBuffer to bufferData()
https://bugs.webkit.org/show_bug.cgi?id=163745

Reviewed by Dean Jackson.

Source/WebCore:

Test: fast/canvas/webgl/bufferData-nullable-array-buffer-view.html

Update the idl file to accept a nullable ArrayBuffer, and throw
the relevant error with a more helpful error string.

* html/canvas/WebGLRenderingContextBase.cpp:
(WebCore::WebGLRenderingContextBase::bufferData):
* html/canvas/WebGLRenderingContextBase.h:
* html/canvas/WebGLRenderingContextBase.idl:

LayoutTests:

* fast/canvas/webgl/bufferData-nullable-array-buffer-view-expected.txt: Added.
* fast/canvas/webgl/bufferData-nullable-array-buffer-view.html: Added.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsChangeLog">trunk/LayoutTests/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCorehtmlcanvasWebGLRenderingContextBasecpp">trunk/Source/WebCore/html/canvas/WebGLRenderingContextBase.cpp</a></li>
<li><a href="#trunkSourceWebCorehtmlcanvasWebGLRenderingContextBaseh">trunk/Source/WebCore/html/canvas/WebGLRenderingContextBase.h</a></li>
<li><a href="#trunkSourceWebCorehtmlcanvasWebGLRenderingContextBaseidl">trunk/Source/WebCore/html/canvas/WebGLRenderingContextBase.idl</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsfastcanvaswebglbufferDatanullablearraybufferviewexpectedtxt">trunk/LayoutTests/fast/canvas/webgl/bufferData-nullable-array-buffer-view-expected.txt</a></li>
<li><a href="#trunkLayoutTestsfastcanvaswebglbufferDatanullablearraybufferviewhtml">trunk/LayoutTests/fast/canvas/webgl/bufferData-nullable-array-buffer-view.html</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkLayoutTestsChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/ChangeLog (207631 => 207632)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/ChangeLog        2016-10-20 19:15:59 UTC (rev 207631)
+++ trunk/LayoutTests/ChangeLog        2016-10-20 19:17:06 UTC (rev 207632)
</span><span class="lines">@@ -1,3 +1,13 @@
</span><ins>+2016-10-20  Myles C. Maxfield  &lt;mmaxfield@apple.com&gt;
+
+        Improve error message when passing a null ArrayBuffer to bufferData()
+        https://bugs.webkit.org/show_bug.cgi?id=163745
+
+        Reviewed by Dean Jackson.
+
+        * fast/canvas/webgl/bufferData-nullable-array-buffer-view-expected.txt: Added.
+        * fast/canvas/webgl/bufferData-nullable-array-buffer-view.html: Added.
+
</ins><span class="cx"> 2016-10-20  Zalan Bujtas  &lt;zalan@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         Stop searching for first-letter containers at multi-column boundary.
</span></span></pre></div>
<a id="trunkLayoutTestsfastcanvaswebglbufferDatanullablearraybufferviewexpectedtxt"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/fast/canvas/webgl/bufferData-nullable-array-buffer-view-expected.txt (0 => 207632)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/canvas/webgl/bufferData-nullable-array-buffer-view-expected.txt                                (rev 0)
+++ trunk/LayoutTests/fast/canvas/webgl/bufferData-nullable-array-buffer-view-expected.txt        2016-10-20 19:17:06 UTC (rev 207632)
</span><span class="lines">@@ -0,0 +1,13 @@
</span><ins>+CONSOLE MESSAGE: line 19: WebGL: INVALID_VALUE: bufferData: null data
+PASS context.getError() is context.NO_ERROR
+PASS context.getError() is context.NO_ERROR
+PASS context.getError() is context.NO_ERROR
+PASS undefined did not throw exception.
+PASS context.getError() is context.NO_ERROR
+PASS undefined did not throw exception.
+PASS context.getError() is context.INVALID_VALUE
+PASS context.getError() is context.NO_ERROR
+PASS successfullyParsed is true
+
+TEST COMPLETE
+
</ins></span></pre></div>
<a id="trunkLayoutTestsfastcanvaswebglbufferDatanullablearraybufferviewhtml"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/fast/canvas/webgl/bufferData-nullable-array-buffer-view.html (0 => 207632)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/canvas/webgl/bufferData-nullable-array-buffer-view.html                                (rev 0)
+++ trunk/LayoutTests/fast/canvas/webgl/bufferData-nullable-array-buffer-view.html        2016-10-20 19:17:06 UTC (rev 207632)
</span><span class="lines">@@ -0,0 +1,25 @@
</span><ins>+&lt;!DOCTYPE html&gt;
+&lt;html&gt;
+&lt;head&gt;
+&lt;script src=&quot;../../../resources/js-test-pre.js&quot;&gt;&lt;/script&gt;
+&lt;/head&gt;
+&lt;body&gt;
+&lt;script&gt;
+var canvas = document.createElement(&quot;canvas&quot;);
+canvas.width = 2;
+canvas.height = 2;
+var context = canvas.getContext(&quot;webgl&quot;);
+shouldBe(&quot;context.getError()&quot;, &quot;context.NO_ERROR&quot;);
+var buffer = context.createBuffer();
+shouldBe(&quot;context.getError()&quot;, &quot;context.NO_ERROR&quot;);
+context.bindBuffer(context.ARRAY_BUFFER, buffer);
+shouldBe(&quot;context.getError()&quot;, &quot;context.NO_ERROR&quot;);
+shouldNotThrow(context.bufferData(context.ARRAY_BUFFER, new ArrayBuffer(10), context.STATIC_DRAW));
+shouldBe(&quot;context.getError()&quot;, &quot;context.NO_ERROR&quot;);
+shouldNotThrow(context.bufferData(context.ARRAY_BUFFER, null, context.STATIC_DRAW));
+shouldBe(&quot;context.getError()&quot;, &quot;context.INVALID_VALUE&quot;);
+shouldBe(&quot;context.getError()&quot;, &quot;context.NO_ERROR&quot;);
+&lt;/script&gt;
+&lt;script src=&quot;../../../resources/js-test-post.js&quot;&gt;&lt;/script&gt;
+&lt;/body&gt;
+&lt;/html&gt;
</ins><span class="cx">\ No newline at end of file
</span></span></pre></div>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (207631 => 207632)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog        2016-10-20 19:15:59 UTC (rev 207631)
+++ trunk/Source/WebCore/ChangeLog        2016-10-20 19:17:06 UTC (rev 207632)
</span><span class="lines">@@ -1,3 +1,20 @@
</span><ins>+2016-10-20  Myles C. Maxfield  &lt;mmaxfield@apple.com&gt;
+
+        Improve error message when passing a null ArrayBuffer to bufferData()
+        https://bugs.webkit.org/show_bug.cgi?id=163745
+
+        Reviewed by Dean Jackson.
+
+        Test: fast/canvas/webgl/bufferData-nullable-array-buffer-view.html
+
+        Update the idl file to accept a nullable ArrayBuffer, and throw
+        the relevant error with a more helpful error string.
+
+        * html/canvas/WebGLRenderingContextBase.cpp:
+        (WebCore::WebGLRenderingContextBase::bufferData):
+        * html/canvas/WebGLRenderingContextBase.h:
+        * html/canvas/WebGLRenderingContextBase.idl:
+
</ins><span class="cx"> 2016-10-20  Zalan Bujtas  &lt;zalan@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         Stop searching for first-letter containers at multi-column boundary.
</span></span></pre></div>
<a id="trunkSourceWebCorehtmlcanvasWebGLRenderingContextBasecpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/html/canvas/WebGLRenderingContextBase.cpp (207631 => 207632)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/html/canvas/WebGLRenderingContextBase.cpp        2016-10-20 19:15:59 UTC (rev 207631)
+++ trunk/Source/WebCore/html/canvas/WebGLRenderingContextBase.cpp        2016-10-20 19:17:06 UTC (rev 207632)
</span><span class="lines">@@ -1075,15 +1075,19 @@
</span><span class="cx">     }
</span><span class="cx"> }
</span><span class="cx"> 
</span><del>-void WebGLRenderingContextBase::bufferData(GC3Denum target, ArrayBuffer&amp; data, GC3Denum usage, ExceptionCode&amp;)
</del><ins>+void WebGLRenderingContextBase::bufferData(GC3Denum target, ArrayBuffer* data, GC3Denum usage, ExceptionCode&amp;)
</ins><span class="cx"> {
</span><span class="cx">     if (isContextLostOrPending())
</span><span class="cx">         return;
</span><ins>+    if (!data) {
+        synthesizeGLError(GraphicsContext3D::INVALID_VALUE, &quot;bufferData&quot;, &quot;null data&quot;);
+        return;
+    }
</ins><span class="cx">     WebGLBuffer* buffer = validateBufferDataParameters(&quot;bufferData&quot;, target, usage);
</span><span class="cx">     if (!buffer)
</span><span class="cx">         return;
</span><span class="cx">     if (!isErrorGeneratedOnOutOfBoundsAccesses()) {
</span><del>-        if (!buffer-&gt;associateBufferData(&amp;data)) {
</del><ins>+        if (!buffer-&gt;associateBufferData(data)) {
</ins><span class="cx">             synthesizeGLError(GraphicsContext3D::INVALID_VALUE, &quot;bufferData&quot;, &quot;invalid buffer&quot;);
</span><span class="cx">             return;
</span><span class="cx">         }
</span><span class="lines">@@ -1090,7 +1094,7 @@
</span><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     m_context-&gt;moveErrorsToSyntheticErrorList();
</span><del>-    m_context-&gt;bufferData(target, data.byteLength(), data.data(), usage);
</del><ins>+    m_context-&gt;bufferData(target, data-&gt;byteLength(), data-&gt;data(), usage);
</ins><span class="cx">     if (m_context-&gt;moveErrorsToSyntheticErrorList()) {
</span><span class="cx">         // The bufferData function failed. Tell the buffer it doesn't have the data it thinks it does.
</span><span class="cx">         buffer-&gt;disassociateBufferData();
</span><span class="lines">@@ -1097,15 +1101,19 @@
</span><span class="cx">     }
</span><span class="cx"> }
</span><span class="cx"> 
</span><del>-void WebGLRenderingContextBase::bufferData(GC3Denum target, ArrayBufferView&amp; data, GC3Denum usage, ExceptionCode&amp;)
</del><ins>+void WebGLRenderingContextBase::bufferData(GC3Denum target, RefPtr&lt;ArrayBufferView&gt;&amp;&amp; data, GC3Denum usage, ExceptionCode&amp;)
</ins><span class="cx"> {
</span><span class="cx">     if (isContextLostOrPending())
</span><span class="cx">         return;
</span><ins>+    if (!data) {
+        synthesizeGLError(GraphicsContext3D::INVALID_VALUE, &quot;bufferData&quot;, &quot;null data&quot;);
+        return;
+    }
</ins><span class="cx">     WebGLBuffer* buffer = validateBufferDataParameters(&quot;bufferData&quot;, target, usage);
</span><span class="cx">     if (!buffer)
</span><span class="cx">         return;
</span><span class="cx">     if (!isErrorGeneratedOnOutOfBoundsAccesses()) {
</span><del>-        if (!buffer-&gt;associateBufferData(&amp;data)) {
</del><ins>+        if (!buffer-&gt;associateBufferData(data.get())) {
</ins><span class="cx">             synthesizeGLError(GraphicsContext3D::INVALID_VALUE, &quot;bufferData&quot;, &quot;invalid buffer&quot;);
</span><span class="cx">             return;
</span><span class="cx">         }
</span><span class="lines">@@ -1112,7 +1120,7 @@
</span><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     m_context-&gt;moveErrorsToSyntheticErrorList();
</span><del>-    m_context-&gt;bufferData(target, data.byteLength(), data.baseAddress(), usage);
</del><ins>+    m_context-&gt;bufferData(target, data-&gt;byteLength(), data-&gt;baseAddress(), usage);
</ins><span class="cx">     if (m_context-&gt;moveErrorsToSyntheticErrorList()) {
</span><span class="cx">         // The bufferData function failed. Tell the buffer it doesn't have the data it thinks it does.
</span><span class="cx">         buffer-&gt;disassociateBufferData();
</span></span></pre></div>
<a id="trunkSourceWebCorehtmlcanvasWebGLRenderingContextBaseh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/html/canvas/WebGLRenderingContextBase.h (207631 => 207632)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/html/canvas/WebGLRenderingContextBase.h        2016-10-20 19:15:59 UTC (rev 207631)
+++ trunk/Source/WebCore/html/canvas/WebGLRenderingContextBase.h        2016-10-20 19:17:06 UTC (rev 207632)
</span><span class="lines">@@ -139,8 +139,8 @@
</span><span class="cx">     void blendFuncSeparate(GC3Denum srcRGB, GC3Denum dstRGB, GC3Denum srcAlpha, GC3Denum dstAlpha);
</span><span class="cx"> 
</span><span class="cx">     void bufferData(GC3Denum target, long long size, GC3Denum usage, ExceptionCode&amp;);
</span><del>-    void bufferData(GC3Denum target, ArrayBuffer&amp; data, GC3Denum usage, ExceptionCode&amp;);
-    void bufferData(GC3Denum target, ArrayBufferView&amp; data, GC3Denum usage, ExceptionCode&amp;);
</del><ins>+    void bufferData(GC3Denum target, ArrayBuffer* data, GC3Denum usage, ExceptionCode&amp;);
+    void bufferData(GC3Denum target, RefPtr&lt;ArrayBufferView&gt;&amp;&amp; data, GC3Denum usage, ExceptionCode&amp;);
</ins><span class="cx">     void bufferSubData(GC3Denum target, long long offset, ArrayBuffer* data, ExceptionCode&amp;);
</span><span class="cx">     void bufferSubData(GC3Denum target, long long offset, RefPtr&lt;ArrayBufferView&gt;&amp;&amp; data, ExceptionCode&amp;);
</span><span class="cx"> 
</span></span></pre></div>
<a id="trunkSourceWebCorehtmlcanvasWebGLRenderingContextBaseidl"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/html/canvas/WebGLRenderingContextBase.idl (207631 => 207632)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/html/canvas/WebGLRenderingContextBase.idl        2016-10-20 19:15:59 UTC (rev 207631)
+++ trunk/Source/WebCore/html/canvas/WebGLRenderingContextBase.idl        2016-10-20 19:17:06 UTC (rev 207632)
</span><span class="lines">@@ -484,8 +484,8 @@
</span><span class="cx">     void blendEquationSeparate(GLenum modeRGB, GLenum modeAlpha);
</span><span class="cx">     void blendFunc(GLenum sfactor, GLenum dfactor);
</span><span class="cx">     void blendFuncSeparate(GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha);
</span><del>-    [MayThrowLegacyException] void bufferData(GLenum target, ArrayBuffer data, GLenum usage);
-    [MayThrowLegacyException] void bufferData(GLenum target, ArrayBufferView data, GLenum usage);
</del><ins>+    [MayThrowLegacyException] void bufferData(GLenum target, ArrayBuffer? data, GLenum usage);
+    [MayThrowLegacyException] void bufferData(GLenum target, ArrayBufferView? data, GLenum usage);
</ins><span class="cx">     [MayThrowLegacyException] void bufferData(GLenum target, GLsizeiptr size, GLenum usage);
</span><span class="cx">     [MayThrowLegacyException] void bufferSubData(GLenum target, GLintptr offset, ArrayBuffer? data);
</span><span class="cx">     [MayThrowLegacyException] void bufferSubData(GLenum target, GLintptr offset, ArrayBufferView? data);
</span></span></pre>
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