Add very basic compressed texture support

Allow direct loading of pkm texture files into Image. This can
be extended to additional texture types, and then eventually
turned into a full plugin architexture.

[ChangeLog][Qt Quick] Allow direct loading of pkm texture files
into Image. For example: Image { source: "myImage.pkm" }

Change-Id: I1baed6c3e85a15752da8adc675482d874c9355ab
Task-number: QTBUG-59872
Task-number: QTBUG-29451
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>

2 files changed, 9 insertions, 0 deletions

diff --git a/tests/auto/qmltest/image/logo.pkm b/tests/auto/qmltest/image/logo.pkm
new file mode 100644
index 0000000000..c0987c5c36
--- /dev/null
+++ b/tests/auto/qmltest/image/logo.pkm
diff --git a/tests/auto/qmltest/image/tst_image.qml b/tests/auto/qmltest/image/tst_image.qml
index 6f2164363c..69ef4d1868 100644
--- a/tests/auto/qmltest/image/tst_image.qml
+++ b/tests/auto/qmltest/image/tst_image.qml
@@ -112,6 +112,11 @@ Item {
         fillMode: Image.TileHorizontally
     }
 
+    Image {
+        id: pkmImage
+        source: "logo.pkm"
+    }
+
     TestCase {
         name: "Image"
 
@@ -212,5 +217,9 @@ Item {
             compare(tileModes3.fillMode, Image.TileHorizontally)
         }
 
+        function test_pkmImage() {
+            compare(pkmImage.width, 256)
+            compare(pkmImage.height, 256)
+        }
     }
 }