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spirv: Handle the PixelCenterInteger execution mode.

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This isn't allowed by Vulkan, but might be useful someday for
SPIR-V in OpenGL (if that ever becomes a thing).  It's easy enough
to hook up, and as precedent, we already do so for OriginLowerLeft.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
This commit is contained in:
Kenneth Graunke 2016-05-18 11:06:08 -07:00
parent 9b8b3f7501
commit de45da6a8c
3 changed files with 7 additions and 0 deletions
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3
src/compiler/spirv/spirv_to_nir.c
View file

@ -2330,6 +2330,9 @@ vtn_handle_execution_mode(struct vtn_builder *b, struct vtn_value *entry_point,
break;
case SpvExecutionModePixelCenterInteger:
b->pixel_center_integer = true;
break;
case SpvExecutionModeXfb:
assert(!"Unhandled execution mode");
break;

1
src/compiler/spirv/vtn_private.h
View file

@ -378,6 +378,7 @@ struct vtn_builder {
const char *entry_point_name;
struct vtn_value *entry_point;
bool origin_upper_left;
bool pixel_center_integer;
struct vtn_function *func;
struct exec_list functions;

3
src/compiler/spirv/vtn_variables.c
View file

@ -1016,6 +1016,9 @@ var_decoration_cb(struct vtn_builder *b, struct vtn_value *val, int member,
if (builtin == SpvBuiltInFragCoord || builtin == SpvBuiltInSamplePosition)
nir_var->data.origin_upper_left = b->origin_upper_left;
if (builtin == SpvBuiltInFragCoord)
nir_var->data.pixel_center_integer = b->pixel_center_integer;
break;
}
case SpvDecorationRowMajor: