On Thu, 14 Jul 2022 16:57:27 GMT, Sergey Bylokhov <[email protected]> wrote:

> OR it is not possible to draw the lines using different colors in one step?

Exactly this is the point.  If the color is changed (alpha change is also 
treated as color change) in between these successive draw calls, we end the 
current vertex batch and issue a draw command for accumulated vertices.
This is the reason MTLPrimitiveTypeLineStrip and MTLPrimitiveTriangleStrip 
cannot be used with our current vertex batching logic.

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PR: https://git.openjdk.org/jdk/pull/9245

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