8261705: Swing jtreg tests fail Metal API Validation with missing buffer binding

[jayathirthrao]

We are hitting MTLRenderer_DrawScanLine with scanlineCount=0. So we end up calling drawPrimitives without actual vertex data. This is causing error when Metal API Validation is enabled. In OpenGL we have null checks for scanline data as well as scanlinecount. We need similar check in case of Metal.

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Progress

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Issue

• JDK-8261705: Swing jtreg tests fail Metal API Validation with missing buffer binding

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$ git fetch https://git.openjdk.java.net/lanai pull/191/head:pull/191
$ git checkout pull/191

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[openjdk]

@jayathirthrao This change now passes all automated pre-integration checks.

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8261705: Swing jtreg tests fail Metal API Validation with missing buffer binding

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[jayathirthrao]

/integrate

[openjdk]

@jayathirthrao Pushed as commit 2a30ee5.

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[mlbridge]

Webrevs

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