OpenHarmony/third_party_mesa3d
2
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

glsl/linker: Fix type checks for location aliasing

Browse Source 
From the OpenGL 4.6 spec, section 4.4.1 Input Layout Qualifiers, Page 68,
(Location aliasing):

   "Further, when location aliasing, the aliases sharing the location
    must have the same underlying numerical type  (floating-point or
    integer)."

The current implementation is too strict, since it checks that the
the base types are an exact match instead.

Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
This commit is contained in:
Iago Toral Quiroga
2017-10-25 09:14:22 +02:00
parent 7276ccf8ed
commit 13652e7516
1 changed files with 19 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
src/compiler/glsl/link_varyings.cpp
View File

@@ -405,13 +405,28 @@ compute_variable_location_slot(ir_variable *var, gl_shader_stage stage)
struct explicit_location_info {
ir_variable *var;
unsigned base_type;
unsigned numerical_type;
unsigned interpolation;
bool centroid;
bool sample;
bool patch;
};
static inline unsigned
get_numerical_type(const glsl_type *type)
{
/* From the OpenGL 4.6 spec, section 4.4.1 Input Layout Qualifiers, Page 68,
* (Location aliasing):
*
* "Further, when location aliasing, the aliases sharing the location
* must have the same underlying numerical type (floating-point or
* integer)
*/
if (type->is_float() || type->is_double())
return GLSL_TYPE_FLOAT;
return GLSL_TYPE_INT;
}
static bool
check_location_aliasing(struct explicit_location_info explicit_locations[][4],
ir_variable *var,
@@ -456,7 +471,8 @@ check_location_aliasing(struct explicit_location_info explicit_locations[][4],
/* For all other used components we need to have matching
* types, interpolation and auxiliary storage
*/
if (info->base_type != type->without_array()->base_type) {
if (info->numerical_type !=
get_numerical_type(type->without_array())) {
linker_error(prog,
"Varyings sharing the same location must "
"have the same underlying numerical type. "
@@ -486,7 +502,7 @@ check_location_aliasing(struct explicit_location_info explicit_locations[][4],
}
} else if (comp >= component && comp < last_comp) {
info->var = var;
info->base_type = type->without_array()->base_type;
info->numerical_type = get_numerical_type(type->without_array());
info->interpolation = interpolation;
info->centroid = centroid;
info->sample = sample;