Merge remote-tracking branch 'origin/5.6' into 5.7v5.7.1

Change-Id: Iee82aa1dcf3957b77ab966a6d077c3de2faa4e45

4 files changed, 53 insertions, 4 deletions

diff --git a/dist/changes-5.6.2 b/dist/changes-5.6.2
new file mode 100644
index 0000000..cae0522
--- /dev/null
+++ b/dist/changes-5.6.2
@@ -0,0 +1,24 @@
+Qt 5.6.2 is a bug-fix release. It maintains both forward and backward
+compatibility (source and binary) with Qt 5.6.0.
+
+For more details, refer to the online documentation included in this
+distribution. The documentation is also available online:
+
+  http://doc.qt.io/qt-5/index.html
+
+The Qt version 5.6 series is binary compatible with the 5.5.x series.
+Applications compiled for 5.5 will continue to run with 5.6.
+
+Some of the changes listed in this file include issue tracking numbers
+corresponding to tasks in the Qt Bug Tracker:
+
+  https://bugreports.qt.io/
+
+Each of these identifiers can be entered in the bug tracker to obtain more
+information about a particular change.
+
+Fixes
+-----
+
+- [QTBUG-54466] Check for null context in CanvasRenderJob.
+- [QTBUG-54876] Align pixel-row of the image passed to glTexImage2D to UNPACK_ALIGN.
diff --git a/src/imports/qtcanvas3d/context3d.cpp b/src/imports/qtcanvas3d/context3d.cpp
index c300772..76dff42 100644
--- a/src/imports/qtcanvas3d/context3d.cpp
+++ b/src/imports/qtcanvas3d/context3d.cpp
@@ -94,6 +94,7 @@ CanvasContext::CanvasContext(QQmlEngine *engine, bool isES2, int maxVertexAttrib
     m_v4engine(QQmlEnginePrivate::getV4Engine(engine)),
     m_unpackFlipYEnabled(false),
     m_unpackPremultiplyAlphaEnabled(false),
+    m_unpackAlignmentValue(4),
     m_devicePixelRatio(1.0),
     m_currentProgram(0),
     m_currentArrayBuffer(0),
@@ -1360,6 +1361,11 @@ QByteArray *CanvasContext::unpackPixels(uchar *srcData, bool useSrcDataAsDst,
                                          << ")";
 
     int bytesPerRow = width * bytesPerPixel;
+
+    // Align bytesPerRow to UNPACK_ALIGNMENT setting
+    if ( m_unpackAlignmentValue > 1)
+        bytesPerRow = bytesPerRow + (m_unpackAlignmentValue - 1) - (bytesPerRow - 1) % m_unpackAlignmentValue;
+
     int totalBytes = bytesPerRow * height;
 
     QByteArray *unpackedData = 0;
@@ -2498,10 +2504,28 @@ void CanvasContext::pixelStorei(glEnums pname, int param)
     case UNPACK_COLORSPACE_CONVERSION_WEBGL:
         // Intentionally ignored
         break;
-    case PACK_ALIGNMENT: // Intentional fall-through
+    case PACK_ALIGNMENT:
+        if ( param == 1 || param == 2 || param == 4 || param == 8 ) {
+            m_commandQueue->queueCommand(CanvasGlCommandQueue::glPixelStorei,
+                                         GLint(pname), GLint(param));
+        } else {
+            m_error |= CANVAS_INVALID_VALUE;
+            qCWarning(canvas3drendering).nospace() << "Context3D::" << __FUNCTION__
+                                                   << ":INVALID_VALUE:"
+                                                   << "Invalid pack alignment: " << param;
+        }
+        break;
     case UNPACK_ALIGNMENT:
-        m_commandQueue->queueCommand(CanvasGlCommandQueue::glPixelStorei,
-                                     GLint(pname), GLint(param));
+        if ( param == 1 || param == 2 || param == 4 || param == 8 ) {
+            m_unpackAlignmentValue = param;
+            m_commandQueue->queueCommand(CanvasGlCommandQueue::glPixelStorei,
+                                         GLint(pname), GLint(param));
+        } else {
+            m_error |= CANVAS_INVALID_VALUE;
+            qCWarning(canvas3drendering).nospace() << "Context3D::" << __FUNCTION__
+                                                   << ":INVALID_VALUE:"
+                                                   << "Invalid unpack alignment: " << param;
+        }
         break;
     default:
         qCWarning(canvas3drendering).nospace() << "Context3D::" << __FUNCTION__
diff --git a/src/imports/qtcanvas3d/context3d_p.h b/src/imports/qtcanvas3d/context3d_p.h
index a5a2e9e..1a5b682 100644
--- a/src/imports/qtcanvas3d/context3d_p.h
+++ b/src/imports/qtcanvas3d/context3d_p.h
@@ -1283,6 +1283,7 @@ private:
     QV4::ExecutionEngine *m_v4engine;
     bool m_unpackFlipYEnabled;
     bool m_unpackPremultiplyAlphaEnabled;
+    int m_unpackAlignmentValue;
     qreal m_devicePixelRatio;
     CanvasProgram *m_currentProgram;
     CanvasBuffer *m_currentArrayBuffer;
diff --git a/src/imports/qtcanvas3d/doc/src/qtcanvas3d.qdoc b/src/imports/qtcanvas3d/doc/src/qtcanvas3d.qdoc
index 275defb..9bee436 100644
--- a/src/imports/qtcanvas3d/doc/src/qtcanvas3d.qdoc
+++ b/src/imports/qtcanvas3d/doc/src/qtcanvas3d.qdoc
@@ -210,7 +210,7 @@
  *
  * \list
  *      \li No emulation for vertex attrib 0 arrays. Always have vertex attrib 0 array enabled.
- *      In desktop OpenGL on some platforms (for example OS X), nothing gets drawn if vertex attrib
+ *      In desktop OpenGL on some platforms (for example \macos), nothing gets drawn if vertex attrib
  *      0 is not array-enabled. You can use bindAttribLocation() to force a vertex attribute to use
  *      location 0, and use enableVertexAttribArray() to make it array-enabled.
  *