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v3d: Fix Z clipping when viewport.scale[2] is negative.

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Fixes:
dEQP-GLES3.functional.shaders.builtin_variable.depth_range_fragment
dEQP-GLES3.functional.shaders.builtin_variable.depth_range_vertex
This commit is contained in:
Eric Anholt 2018-06-25 13:29:42 -07:00
parent 9f80bcc2bc
commit ad1a4cb563
1 changed files with 6 additions and 4 deletions
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10
src/gallium/drivers/v3d/v3dx_emit.c
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@ -465,10 +465,12 @@ v3dX(emit_state)(struct pipe_context *pctx)
v3d->viewport.scale[2];
}
cl_emit(&job->bcl, CLIPPER_Z_MIN_MAX_CLIPPING_PLANES, clip) {
clip.minimum_zw = (v3d->viewport.translate[2] -
v3d->viewport.scale[2]);
clip.maximum_zw = (v3d->viewport.translate[2] +
v3d->viewport.scale[2]);
float z1 = (v3d->viewport.translate[2] -
v3d->viewport.scale[2]);
float z2 = (v3d->viewport.translate[2] +
v3d->viewport.scale[2]);
clip.minimum_zw = MIN2(z1, z2);
clip.maximum_zw = MAX2(z1, z2);
}
cl_emit(&job->bcl, VIEWPORT_OFFSET, vp) {