tree 1c347565eb89b0270284235a38cf69a9124ce4e9
parent 67d7ed7f78f2f13ab3c1fa99ebcca5a44677bf2d
author leiche02 <ryan.chen@arm.com> 1605076934 +0800
committer chen lei <ryan.chen@arm.com> 1607068835 -0500

Use shader to calculate sample point

The test's sampling point is taking from interpolated varying, the inaccuracy
of interpolation may cause wrong sampling, use gl_FragCoord in fragment
shader to calcuate sample point directly.

Component: OpenGL

Affected tests: KHR-GLES32.core.nearest_edge.offset_*

VK-GL-CTS issue: 2651

Change-Id: Ib91595ca07a2b146059c51f2d68ebf086c10553c
(cherry picked from commit 3d55f6adbf38215ce3c4e2986a2a2e8a91086f08)