Round rectangle with gradient fill

[kosthala]

Hi,

Is it possible to draw a round rectangle with gradient fill?
I have scratch my head for hours but i can't find how to do it.


Thanks.

[Tommino]

Yes, it's possible. Thanks to code, published by James in another post, it will like (here with circle):


// Draw a circle into the stencil
GD.SaveContext();
GD.ColorMask(0, 0, 0, 0); // Don't touch color
GD.StencilOp(INCR, INCR); // incrementing stencil
GD.PointSize(80 * 16);
GD.Begin(POINTS);
GD.Vertex2ii(240, 136);
GD.RestoreContext();

// Set the stencil test, to only inside the circle
GD.StencilFunc(EQUAL, 1, 255);

// Things drawn 'B' here are stenciled to inside the circle
GD.cmd_gradient(240 - 80, 136 - 80, 0xff0000, 240 + 50, 136 + 50, 0x00ff00);

[Tommino]

... I forgot to mention, that such operation(s) are quite time expensive. The code above takes about 8ms.