Ok i got ya
one for knitting.
a website that talks about different ways you can accomplish a image-to-knitting pattern
Here is some that will make you a cross stitch chart...but you could easily use it as your knitting chart...
one of those....
these will only make the chart for you....you would need to add the inc/dec's. which then you are back at square one.
I would get the chart made and then shave off the shape you wanted...add your increases and decreases to the edges. sort of on the outside of your shape.
The shapes you show, all would take single decreases...
the first shape would take a decrease on the right edge and a increase on the left edge.. same row. the top and bottom would remain the same.
the second shape you show...you would need to increase on both sides to a certain length and then increase on the right edge and decrease on the left edge to a certain lenght and then decrease on both sides to your point.
Hope that helps