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i965: Allow viewport array extensions with allow_higher_compat_version

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Also fix the obtuse comment.  I had to dig back through the commit logs
to find the real issue.  GL_ARB_viewport_array requires geometry
shaders, and in i965 the only way to have that is with a 3.2+ Core
profile context... or use allow_higher_compat_version.

This increases the maximum Compatibility profile version from 4.0 to 4.6
(on supported hardware) when the allow_higher_compat_version option is
used.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7118>
This commit is contained in:
Ian Romanick 2020-10-12 18:13:19 -07:00
parent 9223842c6b
commit de77fabe13
1 changed files with 5 additions and 3 deletions
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8
src/mesa/drivers/dri/i965/intel_extensions.c
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@ -220,10 +220,12 @@ intelInitExtensions(struct gl_context *ctx)
ctx->Extensions.EXT_disjoint_timer_query =
ctx->Extensions.ARB_timer_query;
/* Only enable this in core profile because other parts of Mesa behave
* slightly differently when the extension is enabled.
/* Only enable this in core profile because geometry shaders are
* required, and Mesa only supports geometry shaders in OpenGL 3.2 and
* later. In this driver, that currently means Core profile.
*/
if (ctx->API == API_OPENGL_CORE) {
if (ctx->API == API_OPENGL_CORE ||
ctx->Const.AllowHigherCompatVersion) {
ctx->Extensions.ARB_shader_viewport_layer_array = true;
ctx->Extensions.ARB_viewport_array = true;
ctx->Extensions.AMD_vertex_shader_viewport_index = true;