[code-reflection] Integrated: Raster performance tests for example-shade

[Gary Frost]

Just some prototypes for direct raster access for possible shader-toy style demo.

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Commit messages:
 - Raster performance tests for example-shade

Changes: https://git.openjdk.org/babylon/pull/886/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=886&range=00
  Stats: 634 lines in 5 files changed: 495 ins; 139 del; 0 mod
  Patch: https://git.openjdk.org/babylon/pull/886.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/886/head:pull/886

PR: https://git.openjdk.org/babylon/pull/886