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vl: allow fragment shader POSITION to be a system value

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Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com
Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Marek Olšák 2016-01-07 23:14:55 +01:00
parent 69f43c2cc9
commit d0cf66d835
1 changed files with 8 additions and 4 deletions
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12
src/gallium/auxiliary/vl/vl_mc.c
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@ -79,14 +79,18 @@ calc_position(struct vl_mc *r, struct ureg_program *shader, struct ureg_src bloc
}
static struct ureg_dst
calc_line(struct ureg_program *shader)
calc_line(struct pipe_screen *screen, struct ureg_program *shader)
{
struct ureg_dst tmp;
struct ureg_src pos;
tmp = ureg_DECL_temporary(shader);
pos = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_POSITION, VS_O_VPOS, TGSI_INTERPOLATE_LINEAR);
if (screen->get_param(screen, PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL))
pos = ureg_DECL_system_value(shader, TGSI_SEMANTIC_POSITION, 0);
else
pos = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_POSITION, VS_O_VPOS,
TGSI_INTERPOLATE_LINEAR);
/*
* tmp.y = fraction(pos.y / 2) >= 0.5 ? 1 : 0
@ -177,7 +181,7 @@ create_ref_frag_shader(struct vl_mc *r)
fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
field = calc_line(shader);
field = calc_line(r->pipe->screen, shader);
/*
* ref = field.z ? tc[1] : tc[0]
@ -324,7 +328,7 @@ create_ycbcr_frag_shader(struct vl_mc *r, float scale, bool invert,
fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
tmp = calc_line(shader);
tmp = calc_line(r->pipe->screen, shader);
/*
* if (field == tc.w)