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gallium: add PIPE_CAP_PSIZ_CLAMPED 

This new capability indicates that the point size has been clamped.
This also means that the gl_PointSize has been modified and that
its value should be lowered for transform feedback, if needed.

Signed-off-by: Louis-Francis Ratté-Boulianne <lfrb@collabora.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Acked-by: Daniel Stone <daniels@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/2433>
This commit is contained in:
Louis-Francis Ratté-Boulianne 2019-10-12 03:01:59 -04:00 committed by Marge Bot
parent babf7357d2
commit 585a21ceca
3 changed files with 4 additions and 0 deletions
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1
src/gallium/auxiliary/util/u_screen.c
View File

@ -418,6 +418,7 @@ u_pipe_screen_get_param_defaults(struct pipe_screen *pscreen,
return 1;
case PIPE_CAP_VIEWPORT_TRANSFORM_LOWERED:
case PIPE_CAP_PSIZ_CLAMPED:
return 0;
default:

1
src/gallium/include/pipe/p_defines.h
View File

@ -917,6 +917,7 @@ enum pipe_cap
PIPE_CAP_NIR_IMAGES_AS_DEREF,
PIPE_CAP_PACKED_STREAM_OUTPUT,
PIPE_CAP_VIEWPORT_TRANSFORM_LOWERED,
PIPE_CAP_PSIZ_CLAMPED,
};
/**

2
src/mesa/state_tracker/st_extensions.c
View File

@ -335,6 +335,8 @@ void st_init_limits(struct pipe_screen *screen,
if (sh == MESA_SHADER_VERTEX) {
if (screen->get_param(screen, PIPE_CAP_VIEWPORT_TRANSFORM_LOWERED))
options->LowerBuiltinVariablesXfb |= VARYING_BIT_POS;
if (screen->get_param(screen, PIPE_CAP_PSIZ_CLAMPED))
options->LowerBuiltinVariablesXfb |= VARYING_BIT_PSIZ;
}
}