ClipToPicture test: Fixed nested states expected look.

ClipToPicture: Correct the scaled clipping tests.

ClipToPicture test: Start the interesting test.

* Also fix the compare graphics to what they are actually supposed to look
for the nested states test.

Completely reworked ClipToPicture test.

* The window lets you pick the test via drop-down.
* The tests are concise and focus on a single thing.
* There is a second view showing the expected result via "regular" drawing.

ClipToPicture test: add even more tests

* Allow scrolling the view,
* Add tests for ScaleBy and SetOrigin
* Add test for multiple clipping pictures using PushState.

Make ClipToPicture test more complete

* Add a test for ClipToInversePicture
* Add a test for ClipToPicture(NULL)

Fix clip_to_picture test app

* We want the text to be drawn on the clipping bitmap with alpha
blending, to get an useful mask.

Add test for ClipToPicture

This draws a rect clipped by a text, and a text clipped by a rect. They
should look the same, but they don't because of lack of antialiasing
support in ClipToPicture.

ClipToPicture test: Fixed nested states expected look.

ClipToPicture: Correct the scaled clipping tests.

ClipToPicture test: Start the interesting test.

* Also fix the compare graphics to what they are actually supposed to look
for the nested states test.

Completely reworked ClipToPicture test.

* The window lets you pick the test via drop-down.
* The tests are concise and focus on a single thing.
* There is a second view showing the expected result via "regular" drawing.

ClipToPicture test: add even more tests

* Allow scrolling the view,
* Add tests for ScaleBy and SetOrigin
* Add test for multiple clipping pictures using PushState.

Make ClipToPicture test more complete

* Add a test for ClipToInversePicture
* Add a test for ClipToPicture(NULL)

Fix clip_to_picture test app

* We want the text to be drawn on the clipping bitmap with alpha
blending, to get an useful mask.

Add test for ClipToPicture

This draws a rect clipped by a text, and a text clipped by a rect. They
should look the same, but they don't because of lack of antialiasing
support in ClipToPicture.