QCommonStyle: add missing png icons derived from svg ones

There are svg icons for information/warning/critical/question/
filedialog_start and filedialog_end but no corresponding png icons.
Therefore create those from the svg files and add them.

Task-number: QTBUG-118122
Change-Id: I2b0eb6450319ba64c41593a1f7705d995187f6b8
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

src/widgets/CMakeLists.txt

@@ -93,6 +93,9 @@ set(qstyle_resource_files
     "styles/images/closedock-64.png"
     "styles/images/computer-16.png"
     "styles/images/computer-32.png"
+    "styles/images/critical-128.png"
+    "styles/images/critical-16.png"
+    "styles/images/critical-32.png"
     "styles/images/desktop-16.png"
     "styles/images/desktop-32.png"
     "styles/images/dirclosed-128.png"
@@ -116,6 +119,12 @@ set(qstyle_resource_files
     "styles/images/filecontents-128.png"
     "styles/images/filecontents-16.png"
     "styles/images/filecontents-32.png"
+    "styles/images/filedialog_end-128.png"
+    "styles/images/filedialog_end-16.png"
+    "styles/images/filedialog_end-32.png"
+    "styles/images/filedialog_start-128.png"
+    "styles/images/filedialog_start-16.png"
+    "styles/images/filedialog_start-32.png"
     "styles/images/fileinfo-128.png"
     "styles/images/fileinfo-16.png"
     "styles/images/fileinfo-32.png"
@@ -131,6 +140,9 @@ set(qstyle_resource_files
     "styles/images/harddrive-128.png"
     "styles/images/harddrive-16.png"
     "styles/images/harddrive-32.png"
+    "styles/images/information-128.png"
+    "styles/images/information-16.png"
+    "styles/images/information-32.png"
     "styles/images/left-128.png"
     "styles/images/left-16.png"
     "styles/images/left-32.png"
@@ -165,6 +177,9 @@ set(qstyle_resource_files
     "styles/images/parentdir-128.png"
     "styles/images/parentdir-16.png"
     "styles/images/parentdir-32.png"
+    "styles/images/question-128.png"
+    "styles/images/question-16.png"
+    "styles/images/question-32.png"
     "styles/images/refresh-24.png"
     "styles/images/refresh-32.png"
     "styles/images/right-128.png"
@@ -247,6 +262,9 @@ set(qstyle_resource_files
     "styles/images/viewlist-128.png"
     "styles/images/viewlist-16.png"
     "styles/images/viewlist-32.png"
+    "styles/images/warning-128.png"
+    "styles/images/warning-16.png"
+    "styles/images/warning-32.png"
 )
 
 qt_internal_add_resource(Widgets "qstyle"

src/widgets/styles/qcommonstyle.cpp

@@ -5900,6 +5900,24 @@ QIcon QCommonStylePrivate::iconFromResourceTheme(QCommonStyle::StandardPixmap st
     QIcon icon;
 #ifndef QT_NO_IMAGEFORMAT_PNG
     switch (standardIcon) {
+    case QStyle::SP_MessageBoxInformation:
+        addIconFiles(u"information-", pngIconSizes, icon);
+        break;
+    case QStyle::SP_MessageBoxWarning:
+        addIconFiles(u"warning-", pngIconSizes, icon);
+        break;
+    case QStyle::SP_MessageBoxCritical:
+        addIconFiles(u"critical-", pngIconSizes, icon);
+        break;
+    case QStyle::SP_MessageBoxQuestion:
+        addIconFiles(u"question-", pngIconSizes, icon);
+        break;
+    case QStyle::SP_FileDialogStart:
+        addIconFiles(u"filedialog_start-", pngIconSizes, icon);
+        break;
+    case QStyle::SP_FileDialogEnd:
+        addIconFiles(u"filedialog_end-", pngIconSizes, icon);
+        break;
     case QStyle::SP_TitleBarMinButton:
         addIconFiles(u"titlebar-min-", titleBarSizes, icon);
         break;