diff options
Diffstat (limited to 'src/compiler/glsl')
| -rw-r--r-- | src/compiler/glsl/ast_to_hir.cpp | 125 |
1 files changed, 123 insertions, 2 deletions
diff --git a/src/compiler/glsl/ast_to_hir.cpp b/src/compiler/glsl/ast_to_hir.cpp index 7a17ba7c6f0..9ff23757533 100644 --- a/src/compiler/glsl/ast_to_hir.cpp +++ b/src/compiler/glsl/ast_to_hir.cpp @@ -2600,6 +2600,67 @@ validate_xfb_buffer_qualifier(YYLTYPE *loc, return true; } +/* From the ARB_enhanced_layouts spec: + * + * "Variables and block members qualified with *xfb_offset* can be + * scalars, vectors, matrices, structures, and (sized) arrays of these. + * The offset must be a multiple of the size of the first component of + * the first qualified variable or block member, or a compile-time error + * results. Further, if applied to an aggregate containing a double, + * the offset must also be a multiple of 8, and the space taken in the + * buffer will be a multiple of 8. + */ +static bool +validate_xfb_offset_qualifier(YYLTYPE *loc, + struct _mesa_glsl_parse_state *state, + int xfb_offset, const glsl_type *type, + unsigned component_size) { + const glsl_type *t_without_array = type->without_array(); + + if (xfb_offset != -1 && type->is_unsized_array()) { + _mesa_glsl_error(loc, state, + "xfb_offset can't be used with unsized arrays."); + return false; + } + + /* Make sure nested structs don't contain unsized arrays, and validate + * any xfb_offsets on interface members. + */ + if (t_without_array->is_record() || t_without_array->is_interface()) + for (unsigned int i = 0; i < t_without_array->length; i++) { + const glsl_type *member_t = t_without_array->fields.structure[i].type; + + /* When the interface block doesn't have an xfb_offset qualifier then + * we apply the component size rules at the member level. + */ + if (xfb_offset == -1) + component_size = member_t->contains_double() ? 8 : 4; + + int xfb_offset = t_without_array->fields.structure[i].offset; + validate_xfb_offset_qualifier(loc, state, xfb_offset, member_t, + component_size); + } + + /* Nested structs or interface block without offset may not have had an + * offset applied yet so return. + */ + if (xfb_offset == -1) { + return true; + } + + if (xfb_offset % component_size) { + _mesa_glsl_error(loc, state, + "invalid qualifier xfb_offset=%d must be a multiple " + "of the first component size of the first qualified " + "variable or block member. Or double if an aggregate " + "that contains a double (%d).", + xfb_offset, component_size); + return false; + } + + return true; +} + static bool validate_stream_qualifier(YYLTYPE *loc, struct _mesa_glsl_parse_state *state, unsigned stream) @@ -3172,6 +3233,19 @@ apply_layout_qualifier_to_variable(const struct ast_type_qualifier *qual, } } + if (qual->flags.q.explicit_xfb_offset) { + unsigned qual_xfb_offset; + unsigned component_size = var->type->contains_double() ? 8 : 4; + + if (process_qualifier_constant(state, loc, "xfb_offset", + qual->offset, &qual_xfb_offset) && + validate_xfb_offset_qualifier(loc, state, (int) qual_xfb_offset, + var->type, component_size)) { + var->data.offset = qual_xfb_offset; + var->data.explicit_xfb_offset = true; + } + } + if (var->type->contains_atomic()) { if (var->data.mode == ir_var_uniform) { if (var->data.explicit_binding) { @@ -6285,6 +6359,7 @@ ast_process_struct_or_iface_block_members(exec_list *instructions, ast_type_qualifier *layout, unsigned block_stream, unsigned block_xfb_buffer, + unsigned block_xfb_offset, unsigned expl_location, unsigned expl_align) { @@ -6505,6 +6580,7 @@ ast_process_struct_or_iface_block_members(exec_list *instructions, fields[i].sample = qual->flags.q.sample ? 1 : 0; fields[i].patch = qual->flags.q.patch ? 1 : 0; fields[i].precision = qual->precision; + fields[i].offset = -1; fields[i].explicit_xfb_buffer = explicit_xfb_buffer; fields[i].xfb_buffer = xfb_buffer; @@ -6569,8 +6645,6 @@ ast_process_struct_or_iface_block_members(exec_list *instructions, "with std430 and std140 layouts"); } } - } else { - fields[i].offset = -1; } if (qual->flags.q.explicit_align || expl_align != 0) { @@ -6603,6 +6677,31 @@ ast_process_struct_or_iface_block_members(exec_list *instructions, next_offset = glsl_align(next_offset + size, align); } + /* From the ARB_enhanced_layouts spec: + * + * "The given offset applies to the first component of the first + * member of the qualified entity. Then, within the qualified + * entity, subsequent components are each assigned, in order, to + * the next available offset aligned to a multiple of that + * component's size. Aggregate types are flattened down to the + * component level to get this sequence of components." + */ + if (qual->flags.q.explicit_xfb_offset) { + unsigned xfb_offset; + if (process_qualifier_constant(state, &loc, "xfb_offset", + qual->offset, &xfb_offset)) { + fields[i].offset = xfb_offset; + block_xfb_offset = fields[i].offset + + 4 * field_type->component_slots(); + } + } else { + if (layout && layout->flags.q.explicit_xfb_offset) { + unsigned align = field_type->is_double() ? 8 : 4; + fields[i].offset = glsl_align(block_xfb_offset, align); + block_xfb_offset += 4 * field_type->component_slots(); + } + } + /* Propogate row- / column-major information down the fields of the * structure or interface block. Structures need this data because * the structure may contain a structure that contains ... a matrix @@ -6698,6 +6797,7 @@ ast_struct_specifier::hir(exec_list *instructions, layout, 0, /* for interface only */ 0, /* for interface only */ + 0, /* for interface only */ expl_location, 0 /* for interface only */); @@ -6864,6 +6964,14 @@ ast_interface_block::hir(exec_list *instructions, return NULL; } + unsigned qual_xfb_offset; + if (layout.flags.q.explicit_xfb_offset) { + if (!process_qualifier_constant(state, &loc, "xfb_offset", + layout.offset, &qual_xfb_offset)) { + return NULL; + } + } + unsigned expl_location = 0; if (layout.flags.q.explicit_location) { if (!process_qualifier_constant(state, &loc, "location", @@ -6900,6 +7008,7 @@ ast_interface_block::hir(exec_list *instructions, &this->layout, qual_stream, qual_xfb_buffer, + qual_xfb_offset, expl_location, expl_align); @@ -7018,6 +7127,8 @@ ast_interface_block::hir(exec_list *instructions, earlier_per_vertex->fields.structure[j].explicit_xfb_buffer; fields[i].xfb_buffer = earlier_per_vertex->fields.structure[j].xfb_buffer; + fields[i].xfb_stride = + earlier_per_vertex->fields.structure[j].xfb_stride; } } @@ -7048,6 +7159,12 @@ ast_interface_block::hir(exec_list *instructions, packing, this->block_name); + unsigned component_size = block_type->contains_double() ? 8 : 4; + int xfb_offset = + layout.flags.q.explicit_xfb_offset ? (int) qual_xfb_offset : -1; + validate_xfb_offset_qualifier(&loc, state, xfb_offset, block_type, + component_size); + if (!state->symbols->add_interface(block_type->name, block_type, var_mode)) { YYLTYPE loc = this->get_location(); _mesa_glsl_error(&loc, state, "interface block `%s' with type `%s' " @@ -7276,6 +7393,10 @@ ast_interface_block::hir(exec_list *instructions, var->data.explicit_xfb_buffer = fields[i].explicit_xfb_buffer; var->data.xfb_buffer = fields[i].xfb_buffer; + if (fields[i].offset != -1) + var->data.explicit_xfb_offset = true; + var->data.offset = fields[i].offset; + var->init_interface_type(block_type); if (var_mode == ir_var_shader_in || var_mode == ir_var_uniform) |