static void
detect_conflicting_assignments(struct _mesa_glsl_parse_state *state,
exec_list *instructions);
+static void
+remove_per_vertex_blocks(exec_list *instructions,
+ _mesa_glsl_parse_state *state, ir_variable_mode mode);
+
void
_mesa_ast_to_hir(exec_list *instructions, struct _mesa_glsl_parse_state *state)
state->toplevel_ir = instructions;
+ state->gs_input_prim_type_specified = false;
+
/* Section 4.2 of the GLSL 1.20 specification states:
* "The built-in functions are scoped in a scope outside the global scope
* users declare global variables in. That is, a shader's global scope,
detect_conflicting_assignments(state, instructions);
state->toplevel_ir = NULL;
+
+ /* Move all of the variable declarations to the front of the IR list, and
+ * reverse the order. This has the (intended!) side effect that vertex
+ * shader inputs and fragment shader outputs will appear in the IR in the
+ * same order that they appeared in the shader code. This results in the
+ * locations being assigned in the declared order. Many (arguably buggy)
+ * applications depend on this behavior, and it matches what nearly all
+ * other drivers do.
+ */
+ foreach_list_safe(node, instructions) {
+ ir_variable *const var = ((ir_instruction *) node)->as_variable();
+
+ if (var == NULL)
+ continue;
+
+ var->remove();
+ instructions->push_head(var);
+ }
+
+ /* From section 7.1 (Built-In Language Variables) of the GLSL 4.10 spec:
+ *
+ * If multiple shaders using members of a built-in block belonging to
+ * the same interface are linked together in the same program, they
+ * must all redeclare the built-in block in the same way, as described
+ * in section 4.3.7 "Interface Blocks" for interface block matching, or
+ * a link error will result.
+ *
+ * The phrase "using members of a built-in block" implies that if two
+ * shaders are linked together and one of them *does not use* any members
+ * of the built-in block, then that shader does not need to have a matching
+ * redeclaration of the built-in block.
+ *
+ * This appears to be a clarification to the behaviour established for
+ * gl_PerVertex by GLSL 1.50, therefore implement it regardless of GLSL
+ * version.
+ *
+ * The definition of "interface" in section 4.3.7 that applies here is as
+ * follows:
+ *
+ * The boundary between adjacent programmable pipeline stages: This
+ * spans all the outputs in all compilation units of the first stage
+ * and all the inputs in all compilation units of the second stage.
+ *
+ * Therefore this rule applies to both inter- and intra-stage linking.
+ *
+ * The easiest way to implement this is to check whether the shader uses
+ * gl_PerVertex right after ast-to-ir conversion, and if it doesn't, simply
+ * remove all the relevant variable declaration from the IR, so that the
+ * linker won't see them and complain about mismatches.
+ */
+ remove_per_vertex_blocks(instructions, state, ir_var_shader_in);
+ remove_per_vertex_blocks(instructions, state, ir_var_shader_out);
}
*/
if (!type_a->is_numeric() || !type_b->is_numeric()) {
_mesa_glsl_error(loc, state,
- "Operands to arithmetic operators must be numeric");
+ "operands to arithmetic operators must be numeric");
return glsl_type::error_type;
}
if (!apply_implicit_conversion(type_a, value_b, state)
&& !apply_implicit_conversion(type_b, value_a, state)) {
_mesa_glsl_error(loc, state,
- "Could not implicitly convert operands to "
+ "could not implicitly convert operands to "
"arithmetic operator");
return glsl_type::error_type;
}
*/
if (!type->is_numeric()) {
_mesa_glsl_error(loc, state,
- "Operands to arithmetic operators must be numeric");
+ "operands to arithmetic operators must be numeric");
return glsl_type::error_type;
}
* unsigned."
*/
if (!type_a->is_integer()) {
- _mesa_glsl_error(loc, state, "LHS of operator %% must be an integer.");
+ _mesa_glsl_error(loc, state, "LHS of operator %% must be an integer");
return glsl_type::error_type;
}
if (!type_b->is_integer()) {
- _mesa_glsl_error(loc, state, "RHS of operator %% must be an integer.");
+ _mesa_glsl_error(loc, state, "RHS of operator %% must be an integer");
return glsl_type::error_type;
}
if (type_a->base_type != type_b->base_type) {
|| !type_a->is_scalar()
|| !type_b->is_scalar()) {
_mesa_glsl_error(loc, state,
- "Operands to relational operators must be scalar and "
+ "operands to relational operators must be scalar and "
"numeric");
return glsl_type::error_type;
}
if (!apply_implicit_conversion(type_a, value_b, state)
&& !apply_implicit_conversion(type_b, value_a, state)) {
_mesa_glsl_error(loc, state,
- "Could not implicitly convert operands to "
+ "could not implicitly convert operands to "
"relational operator");
return glsl_type::error_type;
}
* a scalar as well."
*/
if (type_a->is_scalar() && !type_b->is_scalar()) {
- _mesa_glsl_error(loc, state, "If the first operand of %s is scalar, the "
+ _mesa_glsl_error(loc, state, "if the first operand of %s is scalar, the "
"second must be scalar as well",
ast_expression::operator_string(op));
return glsl_type::error_type;
if (type_a->is_vector() &&
type_b->is_vector() &&
type_a->vector_elements != type_b->vector_elements) {
- _mesa_glsl_error(loc, state, "Vector operands to operator %s must "
+ _mesa_glsl_error(loc, state, "vector operands to operator %s must "
"have same number of elements",
ast_expression::operator_string(op));
return glsl_type::error_type;
*/
ir_rvalue *
validate_assignment(struct _mesa_glsl_parse_state *state,
- const glsl_type *lhs_type, ir_rvalue *rhs,
- bool is_initializer)
+ YYLTYPE loc, const glsl_type *lhs_type,
+ ir_rvalue *rhs, bool is_initializer)
{
/* If there is already some error in the RHS, just return it. Anything
* else will lead to an avalanche of error message back to the user.
if (rhs->type == lhs_type)
return rhs;
- /* If the array element types are the same and the size of the LHS is zero,
+ /* If the array element types are the same and the LHS is unsized,
* the assignment is okay for initializers embedded in variable
* declarations.
*
* Note: Whole-array assignments are not permitted in GLSL 1.10, but this
* is handled by ir_dereference::is_lvalue.
*/
- if (is_initializer && lhs_type->is_array() && rhs->type->is_array()
- && (lhs_type->element_type() == rhs->type->element_type())
- && (lhs_type->array_size() == 0)) {
- return rhs;
+ if (lhs_type->is_unsized_array() && rhs->type->is_array()
+ && (lhs_type->element_type() == rhs->type->element_type())) {
+ if (is_initializer) {
+ return rhs;
+ } else {
+ _mesa_glsl_error(&loc, state,
+ "implicitly sized arrays cannot be assigned");
+ return NULL;
+ }
}
/* Check for implicit conversion in GLSL 1.20 */
return rhs;
}
+ _mesa_glsl_error(&loc, state,
+ "%s of type %s cannot be assigned to "
+ "variable of type %s",
+ is_initializer ? "initializer" : "value",
+ rhs->type->name, lhs_type->name);
+
return NULL;
}
if (unlikely(expr->operation == ir_binop_vector_extract)) {
ir_rvalue *new_rhs =
- validate_assignment(state, lhs->type, rhs, is_initializer);
+ validate_assignment(state, lhs_loc, lhs->type,
+ rhs, is_initializer);
if (new_rhs == NULL) {
- _mesa_glsl_error(& lhs_loc, state, "type mismatch");
return lhs;
} else {
rhs = new(ctx) ir_expression(ir_triop_vector_insert,
}
ir_rvalue *new_rhs =
- validate_assignment(state, lhs->type, rhs, is_initializer);
- if (new_rhs == NULL) {
- _mesa_glsl_error(& lhs_loc, state, "type mismatch");
- } else {
+ validate_assignment(state, lhs_loc, lhs->type, rhs, is_initializer);
+ if (new_rhs != NULL) {
rhs = new_rhs;
/* If the LHS array was not declared with a size, it takes it size from
* dereference of a variable. Any other case would require that the LHS
* is either not an l-value or not a whole array.
*/
- if (lhs->type->array_size() == 0) {
+ if (lhs->type->is_unsized_array()) {
ir_dereference *const d = lhs->as_dereference();
assert(d != NULL);
case GLSL_TYPE_VOID:
case GLSL_TYPE_SAMPLER:
case GLSL_TYPE_INTERFACE:
+ case GLSL_TYPE_ATOMIC_UINT:
/* I assume a comparison of a struct containing a sampler just
* ignores the sampler present in the type.
*/
* gl_MaxTextureCoords."
*/
_mesa_glsl_error(&loc, state, "`gl_TexCoord' array size cannot "
- "be larger than gl_MaxTextureCoords (%u)\n",
+ "be larger than gl_MaxTextureCoords (%u)",
state->Const.MaxTextureCoords);
} else if (strcmp("gl_ClipDistance", name) == 0
&& size > state->Const.MaxClipPlanes) {
* gl_MaxClipDistances."
*/
_mesa_glsl_error(&loc, state, "`gl_ClipDistance' array size cannot "
- "be larger than gl_MaxClipDistances (%u)\n",
+ "be larger than gl_MaxClipDistances (%u)",
state->Const.MaxClipPlanes);
}
}
loc = this->get_location();
switch (this->oper) {
+ case ast_aggregate:
+ assert(!"ast_aggregate: Should never get here.");
+ break;
+
case ast_assign: {
op[0] = this->subexpressions[0]->hir(instructions, state);
op[1] = this->subexpressions[1]->hir(instructions, state);
!state->check_version(120, 300, &loc,
"array comparisons forbidden")) {
error_emitted = true;
+ } else if ((op[0]->type->contains_opaque() ||
+ op[1]->type->contains_opaque())) {
+ _mesa_glsl_error(&loc, state, "opaque type comparisons forbidden");
+ error_emitted = true;
}
if (error_emitted) {
|| (op[1]->type != op[2]->type)) {
YYLTYPE loc = this->subexpressions[1]->get_location();
- _mesa_glsl_error(& loc, state, "Second and third operands of ?: "
- "operator must have matching types.");
+ _mesa_glsl_error(& loc, state, "second and third operands of ?: "
+ "operator must have matching types");
error_emitted = true;
type = glsl_type::error_type;
} else {
*/
if (type->is_array() &&
!state->check_version(120, 300, &loc,
- "Second and third operands of ?: operator "
+ "second and third operands of ?: operator "
"cannot be arrays")) {
error_emitted = true;
}
}
}
}
- } else if (state->es_shader) {
- /* Section 10.17 of the GLSL ES 1.00 specification states that unsized
- * array declarations have been removed from the language.
- */
- _mesa_glsl_error(loc, state, "unsized array declarations are not "
- "allowed in GLSL ES 1.00.");
}
const glsl_type *array_type = glsl_type::get_array_instance(base, length);
return type;
}
+const glsl_type *
+ast_fully_specified_type::glsl_type(const char **name,
+ struct _mesa_glsl_parse_state *state) const
+{
+ const struct glsl_type *type = this->specifier->glsl_type(name, state);
+
+ if (type == NULL)
+ return NULL;
+
+ if (type->base_type == GLSL_TYPE_FLOAT
+ && state->es_shader
+ && state->target == fragment_shader
+ && this->qualifier.precision == ast_precision_none
+ && state->symbols->get_variable("#default precision") == NULL) {
+ YYLTYPE loc = this->get_location();
+ _mesa_glsl_error(&loc, state,
+ "no precision specified this scope for type `%s'",
+ type->name);
+ }
+
+ return type;
+}
/**
* Determine whether a toplevel variable declaration declares a varying. This
static void
validate_matrix_layout_for_type(struct _mesa_glsl_parse_state *state,
YYLTYPE *loc,
- const glsl_type *type)
+ const glsl_type *type,
+ ir_variable *var)
{
- if (!type->is_matrix() && !type->is_record()) {
+ if (var && !var->is_in_uniform_block()) {
+ /* Layout qualifiers may only apply to interface blocks and fields in
+ * them.
+ */
_mesa_glsl_error(loc, state,
"uniform block layout qualifiers row_major and "
- "column_major can only be applied to matrix and "
- "structure types");
+ "column_major may not be applied to variables "
+ "outside of uniform blocks");
+ } else if (!type->is_matrix()) {
+ /* The OpenGL ES 3.0 conformance tests did not originally allow
+ * matrix layout qualifiers on non-matrices. However, the OpenGL
+ * 4.4 and OpenGL ES 3.0 (revision TBD) specifications were
+ * amended to specifically allow these layouts on all types. Emit
+ * a warning so that people know their code may not be portable.
+ */
+ _mesa_glsl_warning(loc, state,
+ "uniform block layout qualifiers row_major and "
+ "column_major applied to non-matrix types may "
+ "be rejected by older compilers");
} else if (type->is_record()) {
/* We allow 'layout(row_major)' on structure types because it's the only
* way to get row-major layouts on matrices contained in structures.
_mesa_glsl_warning(loc, state,
"uniform block layout qualifiers row_major and "
"column_major applied to structure types is not "
- "strictly conformant and my be rejected by other "
+ "strictly conformant and may be rejected by other "
"compilers");
}
}
+static bool
+validate_binding_qualifier(struct _mesa_glsl_parse_state *state,
+ YYLTYPE *loc,
+ ir_variable *var,
+ const ast_type_qualifier *qual)
+{
+ if (var->mode != ir_var_uniform) {
+ _mesa_glsl_error(loc, state,
+ "the \"binding\" qualifier only applies to uniforms");
+ return false;
+ }
+
+ if (qual->binding < 0) {
+ _mesa_glsl_error(loc, state, "binding values must be >= 0");
+ return false;
+ }
+
+ const struct gl_context *const ctx = state->ctx;
+ unsigned elements = var->type->is_array() ? var->type->length : 1;
+ unsigned max_index = qual->binding + elements - 1;
+
+ if (var->type->is_interface()) {
+ /* UBOs. From page 60 of the GLSL 4.20 specification:
+ * "If the binding point for any uniform block instance is less than zero,
+ * or greater than or equal to the implementation-dependent maximum
+ * number of uniform buffer bindings, a compilation error will occur.
+ * When the binding identifier is used with a uniform block instanced as
+ * an array of size N, all elements of the array from binding through
+ * binding + N – 1 must be within this range."
+ *
+ * The implementation-dependent maximum is GL_MAX_UNIFORM_BUFFER_BINDINGS.
+ */
+ if (max_index >= ctx->Const.MaxUniformBufferBindings) {
+ _mesa_glsl_error(loc, state, "layout(binding = %d) for %d UBOs exceeds "
+ "the maximum number of UBO binding points (%d)",
+ qual->binding, elements,
+ ctx->Const.MaxUniformBufferBindings);
+ return false;
+ }
+ } else if (var->type->is_sampler() ||
+ (var->type->is_array() && var->type->fields.array->is_sampler())) {
+ /* Samplers. From page 63 of the GLSL 4.20 specification:
+ * "If the binding is less than zero, or greater than or equal to the
+ * implementation-dependent maximum supported number of units, a
+ * compilation error will occur. When the binding identifier is used
+ * with an array of size N, all elements of the array from binding
+ * through binding + N - 1 must be within this range."
+ */
+ unsigned limit = 0;
+ switch (state->target) {
+ case vertex_shader:
+ limit = ctx->Const.VertexProgram.MaxTextureImageUnits;
+ break;
+ case geometry_shader:
+ limit = ctx->Const.GeometryProgram.MaxTextureImageUnits;
+ break;
+ case fragment_shader:
+ limit = ctx->Const.FragmentProgram.MaxTextureImageUnits;
+ break;
+ }
+
+ if (max_index >= limit) {
+ _mesa_glsl_error(loc, state, "layout(binding = %d) for %d samplers "
+ "exceeds the maximum number of texture image units "
+ "(%d)", qual->binding, elements, limit);
+
+ return false;
+ }
+ } else if (var->type->contains_atomic()) {
+ assert(ctx->Const.MaxAtomicBufferBindings <= MAX_COMBINED_ATOMIC_BUFFERS);
+ if (unsigned(qual->binding) >= ctx->Const.MaxAtomicBufferBindings) {
+ _mesa_glsl_error(loc, state, "layout(binding = %d) exceeds the "
+ " maximum number of atomic counter buffer bindings"
+ "(%d)", qual->binding,
+ ctx->Const.MaxAtomicBufferBindings);
+
+ return false;
+ }
+ } else {
+ _mesa_glsl_error(loc, state,
+ "the \"binding\" qualifier only applies to uniform "
+ "blocks, samplers, atomic counters, or arrays thereof");
+ return false;
+ }
+
+ return true;
+}
+
+
+static glsl_interp_qualifier
+interpret_interpolation_qualifier(const struct ast_type_qualifier *qual,
+ ir_variable_mode mode,
+ struct _mesa_glsl_parse_state *state,
+ YYLTYPE *loc)
+{
+ glsl_interp_qualifier interpolation;
+ if (qual->flags.q.flat)
+ interpolation = INTERP_QUALIFIER_FLAT;
+ else if (qual->flags.q.noperspective)
+ interpolation = INTERP_QUALIFIER_NOPERSPECTIVE;
+ else if (qual->flags.q.smooth)
+ interpolation = INTERP_QUALIFIER_SMOOTH;
+ else
+ interpolation = INTERP_QUALIFIER_NONE;
+
+ if (interpolation != INTERP_QUALIFIER_NONE) {
+ if (mode != ir_var_shader_in && mode != ir_var_shader_out) {
+ _mesa_glsl_error(loc, state,
+ "interpolation qualifier `%s' can only be applied to "
+ "shader inputs or outputs.",
+ interpolation_string(interpolation));
+
+ }
+
+ if ((state->target == vertex_shader && mode == ir_var_shader_in) ||
+ (state->target == fragment_shader && mode == ir_var_shader_out)) {
+ _mesa_glsl_error(loc, state,
+ "interpolation qualifier `%s' cannot be applied to "
+ "vertex shader inputs or fragment shader outputs",
+ interpolation_string(interpolation));
+ }
+ }
+
+ return interpolation;
+}
+
+
+static void
+validate_explicit_location(const struct ast_type_qualifier *qual,
+ ir_variable *var,
+ struct _mesa_glsl_parse_state *state,
+ YYLTYPE *loc)
+{
+ bool fail = false;
+
+ /* In the vertex shader only shader inputs can be given explicit
+ * locations.
+ *
+ * In the fragment shader only shader outputs can be given explicit
+ * locations.
+ */
+ switch (state->target) {
+ case vertex_shader:
+ if (var->mode == ir_var_shader_in) {
+ if (!state->check_explicit_attrib_location_allowed(loc, var))
+ return;
+
+ break;
+ }
+
+ fail = true;
+ break;
+
+ case geometry_shader:
+ _mesa_glsl_error(loc, state,
+ "geometry shader variables cannot be given "
+ "explicit locations");
+ return;
+
+ case fragment_shader:
+ if (var->mode == ir_var_shader_out) {
+ if (!state->check_explicit_attrib_location_allowed(loc, var))
+ return;
+
+ break;
+ }
+
+ fail = true;
+ break;
+ };
+
+ if (fail) {
+ _mesa_glsl_error(loc, state,
+ "%s cannot be given an explicit location in %s shader",
+ mode_string(var),
+ _mesa_glsl_shader_target_name(state->target));
+ } else {
+ var->explicit_location = true;
+
+ /* This bit of silliness is needed because invalid explicit locations
+ * are supposed to be flagged during linking. Small negative values
+ * biased by VERT_ATTRIB_GENERIC0 or FRAG_RESULT_DATA0 could alias
+ * built-in values (e.g., -16+VERT_ATTRIB_GENERIC0 = VERT_ATTRIB_POS).
+ * The linker needs to be able to differentiate these cases. This
+ * ensures that negative values stay negative.
+ */
+ if (qual->location >= 0) {
+ var->location = (state->target == vertex_shader)
+ ? (qual->location + VERT_ATTRIB_GENERIC0)
+ : (qual->location + FRAG_RESULT_DATA0);
+ } else {
+ var->location = qual->location;
+ }
+
+ if (qual->flags.q.explicit_index) {
+ /* From the GLSL 4.30 specification, section 4.4.2 (Output
+ * Layout Qualifiers):
+ *
+ * "It is also a compile-time error if a fragment shader
+ * sets a layout index to less than 0 or greater than 1."
+ *
+ * Older specifications don't mandate a behavior; we take
+ * this as a clarification and always generate the error.
+ */
+ if (qual->index < 0 || qual->index > 1) {
+ _mesa_glsl_error(loc, state,
+ "explicit index may only be 0 or 1");
+ } else {
+ var->explicit_index = true;
+ var->index = qual->index;
+ }
+ }
+ }
+
+ return;
+}
+
static void
apply_type_qualifier_to_variable(const struct ast_type_qualifier *qual,
ir_variable *var,
struct _mesa_glsl_parse_state *state,
YYLTYPE *loc,
- bool ubo_qualifiers_valid,
bool is_parameter)
{
+ STATIC_ASSERT(sizeof(qual->flags.q) <= sizeof(qual->flags.i));
+
if (qual->flags.q.invariant) {
if (var->used) {
_mesa_glsl_error(loc, state,
if (qual->flags.q.centroid)
var->centroid = 1;
+ if (qual->flags.q.sample)
+ var->sample = 1;
+
if (qual->flags.q.attribute && state->target != vertex_shader) {
var->type = glsl_type::error_type;
_mesa_glsl_error(loc, state,
_mesa_glsl_shader_target_name(state->target));
}
+ /* Section 6.1.1 (Function Calling Conventions) of the GLSL 1.10 spec says:
+ *
+ * "However, the const qualifier cannot be used with out or inout."
+ *
+ * The same section of the GLSL 4.40 spec further clarifies this saying:
+ *
+ * "The const qualifier cannot be used with out or inout, or a
+ * compile-time error results."
+ */
+ if (is_parameter && qual->flags.q.constant && qual->flags.q.out) {
+ _mesa_glsl_error(loc, state,
+ "`const' may not be applied to `out' or `inout' "
+ "function parameters");
+ }
+
/* If there is no qualifier that changes the mode of the variable, leave
* the setting alone.
*/
}
}
- if (qual->flags.q.flat)
- var->interpolation = INTERP_QUALIFIER_FLAT;
- else if (qual->flags.q.noperspective)
- var->interpolation = INTERP_QUALIFIER_NOPERSPECTIVE;
- else if (qual->flags.q.smooth)
- var->interpolation = INTERP_QUALIFIER_SMOOTH;
- else
- var->interpolation = INTERP_QUALIFIER_NONE;
-
- if (var->interpolation != INTERP_QUALIFIER_NONE &&
- !(state->target == vertex_shader && var->mode == ir_var_shader_out) &&
- !(state->target == fragment_shader && var->mode == ir_var_shader_in)) {
- _mesa_glsl_error(loc, state,
- "interpolation qualifier `%s' can only be applied to "
- "vertex shader outputs and fragment shader inputs.",
- var->interpolation_string());
- }
+ var->interpolation =
+ interpret_interpolation_qualifier(qual, (ir_variable_mode) var->mode,
+ state, loc);
var->pixel_center_integer = qual->flags.q.pixel_center_integer;
var->origin_upper_left = qual->flags.q.origin_upper_left;
}
if (qual->flags.q.explicit_location) {
- const bool global_scope = (state->current_function == NULL);
- bool fail = false;
- const char *string = "";
-
- /* In the vertex shader only shader inputs can be given explicit
- * locations.
- *
- * In the fragment shader only shader outputs can be given explicit
- * locations.
- */
- switch (state->target) {
- case vertex_shader:
- if (!global_scope || (var->mode != ir_var_shader_in)) {
- fail = true;
- string = "input";
- }
- break;
-
- case geometry_shader:
+ validate_explicit_location(qual, var, state, loc);
+ } else if (qual->flags.q.explicit_index) {
_mesa_glsl_error(loc, state,
- "geometry shader variables cannot be given "
- "explicit locations\n");
- break;
+ "explicit index requires explicit location");
+ }
- case fragment_shader:
- if (!global_scope || (var->mode != ir_var_shader_out)) {
- fail = true;
- string = "output";
- }
- break;
- };
+ if (qual->flags.q.explicit_binding &&
+ validate_binding_qualifier(state, loc, var, qual)) {
+ var->explicit_binding = true;
+ var->binding = qual->binding;
+ }
- if (fail) {
- _mesa_glsl_error(loc, state,
- "only %s shader %s variables can be given an "
- "explicit location\n",
- _mesa_glsl_shader_target_name(state->target),
- string);
- } else {
- var->explicit_location = true;
-
- /* This bit of silliness is needed because invalid explicit locations
- * are supposed to be flagged during linking. Small negative values
- * biased by VERT_ATTRIB_GENERIC0 or FRAG_RESULT_DATA0 could alias
- * built-in values (e.g., -16+VERT_ATTRIB_GENERIC0 = VERT_ATTRIB_POS).
- * The linker needs to be able to differentiate these cases. This
- * ensures that negative values stay negative.
- */
- if (qual->location >= 0) {
- var->location = (state->target == vertex_shader)
- ? (qual->location + VERT_ATTRIB_GENERIC0)
- : (qual->location + FRAG_RESULT_DATA0);
- } else {
- var->location = qual->location;
- }
+ if (var->type->contains_atomic()) {
+ if (var->mode == ir_var_uniform) {
+ if (var->explicit_binding) {
+ unsigned *offset = &state->atomic_counter_offsets[var->binding];
- if (qual->flags.q.explicit_index) {
- /* From the GLSL 4.30 specification, section 4.4.2 (Output
- * Layout Qualifiers):
- *
- * "It is also a compile-time error if a fragment shader
- * sets a layout index to less than 0 or greater than 1."
- *
- * Older specifications don't mandate a behavior; we take
- * this as a clarification and always generate the error.
- */
- if (qual->index < 0 || qual->index > 1) {
+ if (*offset % ATOMIC_COUNTER_SIZE)
_mesa_glsl_error(loc, state,
- "explicit index may only be 0 or 1\n");
- } else {
- var->explicit_index = true;
- var->index = qual->index;
- }
- }
+ "misaligned atomic counter offset");
+
+ var->atomic.offset = *offset;
+ *offset += var->type->atomic_size();
+
+ } else {
+ _mesa_glsl_error(loc, state,
+ "atomic counters require explicit binding point");
+ }
+ } else if (var->mode != ir_var_function_in) {
+ _mesa_glsl_error(loc, state, "atomic counters may only be declared as "
+ "function parameters or uniform-qualified "
+ "global variables");
}
- } else if (qual->flags.q.explicit_index) {
- _mesa_glsl_error(loc, state,
- "explicit index requires explicit location\n");
}
- /* Does the declaration use the 'layout' keyword?
- */
- const bool uses_layout = qual->flags.q.pixel_center_integer
- || qual->flags.q.origin_upper_left
- || qual->flags.q.explicit_location; /* no need for index since it relies on location */
-
/* Does the declaration use the deprecated 'attribute' or 'varying'
* keywords?
*/
const bool relaxed_layout_qualifier_checking =
state->ARB_fragment_coord_conventions_enable;
- if (uses_layout && uses_deprecated_qualifier) {
+ if (qual->has_layout() && uses_deprecated_qualifier) {
if (relaxed_layout_qualifier_checking) {
_mesa_glsl_warning(loc, state,
"`layout' qualifier may not be used with "
}
if (qual->flags.q.row_major || qual->flags.q.column_major) {
- if (!ubo_qualifiers_valid) {
- _mesa_glsl_error(loc, state,
- "uniform block layout qualifiers row_major and "
- "column_major can only be applied to uniform block "
- "members");
- } else
- validate_matrix_layout_for_type(state, loc, var->type);
+ validate_matrix_layout_for_type(state, loc, var->type, var);
}
}
* A pointer to an existing variable in the current scope if the declaration
* is a redeclaration, \c NULL otherwise.
*/
-ir_variable *
-get_variable_being_redeclared(ir_variable *var, ast_declaration *decl,
- struct _mesa_glsl_parse_state *state)
+static ir_variable *
+get_variable_being_redeclared(ir_variable *var, YYLTYPE loc,
+ struct _mesa_glsl_parse_state *state,
+ bool allow_all_redeclarations)
{
/* Check if this declaration is actually a re-declaration, either to
* resize an array or add qualifiers to an existing variable.
* This is allowed for variables in the current scope, or when at
* global scope (for built-ins in the implicit outer scope).
*/
- ir_variable *earlier = state->symbols->get_variable(decl->identifier);
+ ir_variable *earlier = state->symbols->get_variable(var->name);
if (earlier == NULL ||
(state->current_function != NULL &&
- !state->symbols->name_declared_this_scope(decl->identifier))) {
+ !state->symbols->name_declared_this_scope(var->name))) {
return NULL;
}
- YYLTYPE loc = decl->get_location();
-
/* From page 24 (page 30 of the PDF) of the GLSL 1.50 spec,
*
* "It is legal to declare an array without a size and then
* later re-declare the same name as an array of the same
* type and specify a size."
*/
- if ((earlier->type->array_size() == 0)
- && var->type->is_array()
+ if (earlier->type->is_unsized_array() && var->type->is_array()
&& (var->type->element_type() == earlier->type->element_type())) {
/* FINISHME: This doesn't match the qualifiers on the two
* FINISHME: declarations. It's not 100% clear whether this is
earlier->type = var->type;
delete var;
var = NULL;
- } else if (state->ARB_fragment_coord_conventions_enable
+ } else if ((state->ARB_fragment_coord_conventions_enable ||
+ state->is_version(150, 0))
&& strcmp(var->name, "gl_FragCoord") == 0
&& earlier->type == var->type
&& earlier->mode == var->mode) {
earlier->depth_layout = var->depth_layout;
+ } else if (allow_all_redeclarations) {
+ if (earlier->mode != var->mode) {
+ _mesa_glsl_error(&loc, state,
+ "redeclaration of `%s' with incorrect qualifiers",
+ var->name);
+ } else if (earlier->type != var->type) {
+ _mesa_glsl_error(&loc, state,
+ "redeclaration of `%s' has incorrect type",
+ var->name);
+ }
} else {
- _mesa_glsl_error(&loc, state, "`%s' redeclared", decl->identifier);
+ _mesa_glsl_error(&loc, state, "`%s' redeclared", var->name);
}
return earlier;
*/
if (type->qualifier.flags.q.constant
|| type->qualifier.flags.q.uniform) {
- ir_rvalue *new_rhs = validate_assignment(state, var->type, rhs, true);
+ ir_rvalue *new_rhs = validate_assignment(state, initializer_loc,
+ var->type, rhs, true);
if (new_rhs != NULL) {
rhs = new_rhs;
ir_constant *constant_value = rhs->constant_expression_value();
if (!constant_value) {
- _mesa_glsl_error(& initializer_loc, state,
- "initializer of %s variable `%s' must be a "
- "constant expression",
- (type->qualifier.flags.q.constant)
- ? "const" : "uniform",
- decl->identifier);
- if (var->type->is_numeric()) {
- /* Reduce cascading errors. */
- var->constant_value = ir_constant::zero(state, var->type);
- }
- } else {
+ /* If ARB_shading_language_420pack is enabled, initializers of
+ * const-qualified local variables do not have to be constant
+ * expressions. Const-qualified global variables must still be
+ * initialized with constant expressions.
+ */
+ if (!state->ARB_shading_language_420pack_enable
+ || state->current_function == NULL) {
+ _mesa_glsl_error(& initializer_loc, state,
+ "initializer of %s variable `%s' must be a "
+ "constant expression",
+ (type->qualifier.flags.q.constant)
+ ? "const" : "uniform",
+ decl->identifier);
+ if (var->type->is_numeric()) {
+ /* Reduce cascading errors. */
+ var->constant_value = ir_constant::zero(state, var->type);
+ }
+ }
+ } else {
rhs = constant_value;
var->constant_value = constant_value;
}
} else {
- _mesa_glsl_error(&initializer_loc, state,
- "initializer of type %s cannot be assigned to "
- "variable of type %s",
- rhs->type->name, var->type->name);
if (var->type->is_numeric()) {
/* Reduce cascading errors. */
var->constant_value = ir_constant::zero(state, var->type);
return result;
}
+
+/**
+ * Do additional processing necessary for geometry shader input declarations
+ * (this covers both interface blocks arrays and bare input variables).
+ */
+static void
+handle_geometry_shader_input_decl(struct _mesa_glsl_parse_state *state,
+ YYLTYPE loc, ir_variable *var)
+{
+ unsigned num_vertices = 0;
+ if (state->gs_input_prim_type_specified) {
+ num_vertices = vertices_per_prim(state->gs_input_prim_type);
+ }
+
+ /* Geometry shader input variables must be arrays. Caller should have
+ * reported an error for this.
+ */
+ if (!var->type->is_array()) {
+ assert(state->error);
+
+ /* To avoid cascading failures, short circuit the checks below. */
+ return;
+ }
+
+ if (var->type->is_unsized_array()) {
+ /* Section 4.3.8.1 (Input Layout Qualifiers) of the GLSL 1.50 spec says:
+ *
+ * All geometry shader input unsized array declarations will be
+ * sized by an earlier input layout qualifier, when present, as per
+ * the following table.
+ *
+ * Followed by a table mapping each allowed input layout qualifier to
+ * the corresponding input length.
+ */
+ if (num_vertices != 0)
+ var->type = glsl_type::get_array_instance(var->type->fields.array,
+ num_vertices);
+ } else {
+ /* Section 4.3.8.1 (Input Layout Qualifiers) of the GLSL 1.50 spec
+ * includes the following examples of compile-time errors:
+ *
+ * // code sequence within one shader...
+ * in vec4 Color1[]; // size unknown
+ * ...Color1.length()...// illegal, length() unknown
+ * in vec4 Color2[2]; // size is 2
+ * ...Color1.length()...// illegal, Color1 still has no size
+ * in vec4 Color3[3]; // illegal, input sizes are inconsistent
+ * layout(lines) in; // legal, input size is 2, matching
+ * in vec4 Color4[3]; // illegal, contradicts layout
+ * ...
+ *
+ * To detect the case illustrated by Color3, we verify that the size of
+ * an explicitly-sized array matches the size of any previously declared
+ * explicitly-sized array. To detect the case illustrated by Color4, we
+ * verify that the size of an explicitly-sized array is consistent with
+ * any previously declared input layout.
+ */
+ if (num_vertices != 0 && var->type->length != num_vertices) {
+ _mesa_glsl_error(&loc, state,
+ "geometry shader input size contradicts previously"
+ " declared layout (size is %u, but layout requires a"
+ " size of %u)", var->type->length, num_vertices);
+ } else if (state->gs_input_size != 0 &&
+ var->type->length != state->gs_input_size) {
+ _mesa_glsl_error(&loc, state,
+ "geometry shader input sizes are "
+ "inconsistent (size is %u, but a previous "
+ "declaration has size %u)",
+ var->type->length, state->gs_input_size);
+ } else {
+ state->gs_input_size = var->type->length;
+ }
+ }
+}
+
+
+void
+validate_identifier(const char *identifier, YYLTYPE loc,
+ struct _mesa_glsl_parse_state *state)
+{
+ /* From page 15 (page 21 of the PDF) of the GLSL 1.10 spec,
+ *
+ * "Identifiers starting with "gl_" are reserved for use by
+ * OpenGL, and may not be declared in a shader as either a
+ * variable or a function."
+ */
+ if (strncmp(identifier, "gl_", 3) == 0) {
+ _mesa_glsl_error(&loc, state,
+ "identifier `%s' uses reserved `gl_' prefix",
+ identifier);
+ } else if (strstr(identifier, "__")) {
+ /* From page 14 (page 20 of the PDF) of the GLSL 1.10
+ * spec:
+ *
+ * "In addition, all identifiers containing two
+ * consecutive underscores (__) are reserved as
+ * possible future keywords."
+ */
+ _mesa_glsl_error(&loc, state,
+ "identifier `%s' uses reserved `__' string",
+ identifier);
+ }
+}
+
+
ir_rvalue *
ast_declarator_list::hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state)
if (state->current_function != NULL) {
_mesa_glsl_error(& loc, state,
- "All uses of `invariant' keyword must be at global "
- "scope\n");
+ "all uses of `invariant' keyword must be at global "
+ "scope");
}
foreach_list_typed (ast_declaration, decl, link, &this->declarations) {
state->symbols->get_variable(decl->identifier);
if (earlier == NULL) {
_mesa_glsl_error(& loc, state,
- "Undeclared variable `%s' cannot be marked "
- "invariant\n", decl->identifier);
+ "undeclared variable `%s' cannot be marked "
+ "invariant", decl->identifier);
} else if ((state->target == vertex_shader)
&& (earlier->mode != ir_var_shader_out)) {
_mesa_glsl_error(& loc, state,
"`%s' cannot be marked invariant, vertex shader "
- "outputs only\n", decl->identifier);
+ "outputs only", decl->identifier);
} else if ((state->target == fragment_shader)
&& (earlier->mode != ir_var_shader_in)) {
_mesa_glsl_error(& loc, state,
"`%s' cannot be marked invariant, fragment shader "
- "inputs only\n", decl->identifier);
+ "inputs only", decl->identifier);
} else if (earlier->used) {
_mesa_glsl_error(& loc, state,
"variable `%s' may not be redeclared "
*/
(void) this->type->specifier->hir(instructions, state);
- decl_type = this->type->specifier->glsl_type(& type_name, state);
+ decl_type = this->type->glsl_type(& type_name, state);
+
+ /* An offset-qualified atomic counter declaration sets the default
+ * offset for the next declaration within the same atomic counter
+ * buffer.
+ */
+ if (decl_type && decl_type->contains_atomic()) {
+ if (type->qualifier.flags.q.explicit_binding &&
+ type->qualifier.flags.q.explicit_offset)
+ state->atomic_counter_offsets[type->qualifier.binding] =
+ type->qualifier.offset;
+ }
+
if (this->declarations.is_empty()) {
/* If there is no structure involved in the program text, there are two
* possible scenarios:
* name of a known structure type. This is both invalid and weird.
* Emit an error.
*
+ * - The program text contained something like 'mediump float;'
+ * when the programmer probably meant 'precision mediump
+ * float;' Emit a warning with a description of what they
+ * probably meant to do.
+ *
* Note that if decl_type is NULL and there is a structure involved,
* there must have been some sort of error with the structure. In this
* case we assume that an error was already generated on this line of
*/
assert(this->type->specifier->structure == NULL || decl_type != NULL
|| state->error);
- if (this->type->specifier->structure == NULL) {
- if (decl_type != NULL) {
- _mesa_glsl_warning(&loc, state, "empty declaration");
- } else {
- _mesa_glsl_error(&loc, state,
- "invalid type `%s' in empty declaration",
- type_name);
- }
+
+ if (decl_type == NULL) {
+ _mesa_glsl_error(&loc, state,
+ "invalid type `%s' in empty declaration",
+ type_name);
+ } else if (decl_type->base_type == GLSL_TYPE_ATOMIC_UINT) {
+ /* Empty atomic counter declarations are allowed and useful
+ * to set the default offset qualifier.
+ */
+ return NULL;
+ } else if (this->type->qualifier.precision != ast_precision_none) {
+ if (this->type->specifier->structure != NULL) {
+ _mesa_glsl_error(&loc, state,
+ "precision qualifiers can't be applied "
+ "to structures");
+ } else {
+ static const char *const precision_names[] = {
+ "highp",
+ "highp",
+ "mediump",
+ "lowp"
+ };
+
+ _mesa_glsl_warning(&loc, state,
+ "empty declaration with precision qualifier, "
+ "to set the default precision, use "
+ "`precision %s %s;'",
+ precision_names[this->type->qualifier.precision],
+ type_name);
+ }
+ } else if (this->type->specifier->structure == NULL) {
+ _mesa_glsl_warning(&loc, state, "empty declaration");
}
}
var = new(ctx) ir_variable(var_type, decl->identifier, ir_var_auto);
+ /* The 'varying in' and 'varying out' qualifiers can only be used with
+ * ARB_geometry_shader4 and EXT_geometry_shader4, which we don't support
+ * yet.
+ */
+ if (this->type->qualifier.flags.q.varying) {
+ if (this->type->qualifier.flags.q.in) {
+ _mesa_glsl_error(& loc, state,
+ "`varying in' qualifier in declaration of "
+ "`%s' only valid for geometry shaders using "
+ "ARB_geometry_shader4 or EXT_geometry_shader4",
+ decl->identifier);
+ } else if (this->type->qualifier.flags.q.out) {
+ _mesa_glsl_error(& loc, state,
+ "`varying out' qualifier in declaration of "
+ "`%s' only valid for geometry shaders using "
+ "ARB_geometry_shader4 or EXT_geometry_shader4",
+ decl->identifier);
+ }
+ }
+
/* From page 22 (page 28 of the PDF) of the GLSL 1.10 specification;
*
* "Global variables can only use the qualifiers const,
* any extension that adds the 'layout' keyword.
*/
if (!state->is_version(130, 300)
- && !state->ARB_explicit_attrib_location_enable
+ && !state->has_explicit_attrib_location()
&& !state->ARB_fragment_coord_conventions_enable) {
if (this->type->qualifier.flags.q.out) {
_mesa_glsl_error(& loc, state,
"`out' qualifier in declaration of `%s' "
- "only valid for function parameters in %s.",
+ "only valid for function parameters in %s",
decl->identifier, state->get_version_string());
}
if (this->type->qualifier.flags.q.in) {
_mesa_glsl_error(& loc, state,
"`in' qualifier in declaration of `%s' "
- "only valid for function parameters in %s.",
+ "only valid for function parameters in %s",
decl->identifier, state->get_version_string());
}
/* FINISHME: Test for other invalid qualifiers. */
}
apply_type_qualifier_to_variable(& this->type->qualifier, var, state,
- & loc, this->ubo_qualifiers_valid, false);
+ & loc, false);
if (this->type->qualifier.flags.q.invariant) {
if ((state->target == vertex_shader) &&
var->mode != ir_var_shader_out) {
_mesa_glsl_error(& loc, state,
"`%s' cannot be marked invariant, vertex shader "
- "outputs only\n", var->name);
+ "outputs only", var->name);
} else if ((state->target == fragment_shader) &&
var->mode != ir_var_shader_in) {
/* FINISHME: Note that this doesn't work for invariant on
*/
_mesa_glsl_error(& loc, state,
"`%s' cannot be marked invariant, fragment shader "
- "inputs only\n", var->name);
+ "inputs only", var->name);
}
}
}
if (!error_emitted && var->type->is_array() &&
- !state->check_version(140, 0, &loc,
+ !state->check_version(150, 0, &loc,
"vertex shader input / attribute "
"cannot have array type")) {
error_emitted = true;
}
- }
+ } else if (state->target == geometry_shader) {
+ /* From section 4.3.4 (Inputs) of the GLSL 1.50 spec:
+ *
+ * Geometry shader input variables get the per-vertex values
+ * written out by vertex shader output variables of the same
+ * names. Since a geometry shader operates on a set of
+ * vertices, each input varying variable (or input block, see
+ * interface blocks below) needs to be declared as an array.
+ */
+ if (!var->type->is_array()) {
+ _mesa_glsl_error(&loc, state,
+ "geometry shader inputs must be arrays");
+ }
+
+ handle_geometry_shader_input_decl(state, loc, var);
+ }
}
/* Integer fragment inputs must be qualified with 'flat'. In GLSL ES,
&& state->es_shader))) {
const char *var_type = (state->target == vertex_shader) ?
"vertex output" : "fragment input";
- _mesa_glsl_error(&loc, state, "If a %s is (or contains) "
+ _mesa_glsl_error(&loc, state, "if a %s is (or contains) "
"an integer, then it must be qualified with 'flat'",
var_type);
}
}
break;
default:
- assert(0);
+ break;
}
}
"'centroid in' cannot be used in a vertex shader");
}
+ if (state->target == vertex_shader
+ && this->type->qualifier.flags.q.sample
+ && this->type->qualifier.flags.q.in) {
+
+ _mesa_glsl_error(&loc, state,
+ "'sample in' cannot be used in a vertex shader");
+ }
+
+ /* Section 4.3.6 of the GLSL 1.30 specification states:
+ * "It is an error to use centroid out in a fragment shader."
+ *
+ * The GL_ARB_shading_language_420pack extension specification states:
+ * "It is an error to use auxiliary storage qualifiers or interpolation
+ * qualifiers on an output in a fragment shader."
+ */
+ if (state->target == fragment_shader &&
+ this->type->qualifier.flags.q.out &&
+ this->type->qualifier.has_auxiliary_storage()) {
+ _mesa_glsl_error(&loc, state,
+ "auxiliary storage qualifiers cannot be used on "
+ "fragment shader outputs");
+ }
/* Precision qualifiers exists only in GLSL versions 1.00 and >= 1.30.
*/
- if (this->type->specifier->precision != ast_precision_none) {
+ if (this->type->qualifier.precision != ast_precision_none) {
state->check_precision_qualifiers_allowed(&loc);
}
- /* Precision qualifiers only apply to floating point and integer types.
+ /* Precision qualifiers apply to floating point, integer and sampler
+ * types.
*
- * From section 4.5.2 of the GLSL 1.30 spec:
+ * Section 4.5.2 (Precision Qualifiers) of the GLSL 1.30 spec says:
* "Any floating point or any integer declaration can have the type
* preceded by one of these precision qualifiers [...] Literal
* constants do not have precision qualifiers. Neither do Boolean
* variables.
*
- * In GLSL ES, sampler types are also allowed.
+ * Section 4.5 (Precision and Precision Qualifiers) of the GLSL 1.30
+ * spec also says:
+ *
+ * "Precision qualifiers are added for code portability with OpenGL
+ * ES, not for functionality. They have the same syntax as in OpenGL
+ * ES."
+ *
+ * Section 8 (Built-In Functions) of the GLSL ES 1.00 spec says:
*
- * From page 87 of the GLSL ES spec:
- * "RESOLUTION: Allow sampler types to take a precision qualifier."
+ * "uniform lowp sampler2D sampler;
+ * highp vec2 coord;
+ * ...
+ * lowp vec4 col = texture2D (sampler, coord);
+ * // texture2D returns lowp"
+ *
+ * From this, we infer that GLSL 1.30 (and later) should allow precision
+ * qualifiers on sampler types just like float and integer types.
*/
- if (this->type->specifier->precision != ast_precision_none
+ if (this->type->qualifier.precision != ast_precision_none
&& !var->type->is_float()
&& !var->type->is_integer()
- && !(var->type->is_sampler() && state->es_shader)
+ && !var->type->is_record()
+ && !var->type->is_sampler()
&& !(var->type->is_array()
&& (var->type->fields.array->is_float()
|| var->type->fields.array->is_integer()))) {
_mesa_glsl_error(&loc, state,
"precision qualifiers apply only to floating point"
- "%s types", state->es_shader ? ", integer, and sampler"
- : "and integer");
+ ", integer and sampler types");
}
/* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
* instruction stream.
*/
exec_list initializer_instructions;
- ir_variable *earlier = get_variable_being_redeclared(var, decl, state);
+ ir_variable *earlier =
+ get_variable_being_redeclared(var, decl->get_location(), state,
+ false /* allow_all_redeclarations */);
+ if (earlier != NULL) {
+ if (strncmp(var->name, "gl_", 3) == 0 &&
+ earlier->how_declared == ir_var_declared_in_block) {
+ _mesa_glsl_error(&loc, state,
+ "`%s' has already been redeclared using "
+ "gl_PerVertex", var->name);
+ }
+ earlier->how_declared = ir_var_declared_normally;
+ }
if (decl->initializer != NULL) {
result = process_initializer((earlier == NULL) ? var : earlier,
decl->identifier);
}
+ if (state->es_shader) {
+ const glsl_type *const t = (earlier == NULL)
+ ? var->type : earlier->type;
+
+ if (t->is_unsized_array())
+ /* Section 10.17 of the GLSL ES 1.00 specification states that
+ * unsized array declarations have been removed from the language.
+ * Arrays that are sized using an initializer are still explicitly
+ * sized. However, GLSL ES 1.00 does not allow array
+ * initializers. That is only allowed in GLSL ES 3.00.
+ *
+ * Section 4.1.9 (Arrays) of the GLSL ES 3.00 spec says:
+ *
+ * "An array type can also be formed without specifying a size
+ * if the definition includes an initializer:
+ *
+ * float x[] = float[2] (1.0, 2.0); // declares an array of size 2
+ * float y[] = float[] (1.0, 2.0, 3.0); // declares an array of size 3
+ *
+ * float a[5];
+ * float b[] = a;"
+ */
+ _mesa_glsl_error(& loc, state,
+ "unsized array declarations are not allowed in "
+ "GLSL ES");
+ }
+
/* If the declaration is not a redeclaration, there are a few additional
* semantic checks that must be applied. In addition, variable that was
* created for the declaration should be added to the IR stream.
*/
if (earlier == NULL) {
- /* From page 15 (page 21 of the PDF) of the GLSL 1.10 spec,
- *
- * "Identifiers starting with "gl_" are reserved for use by
- * OpenGL, and may not be declared in a shader as either a
- * variable or a function."
- */
- if (strncmp(decl->identifier, "gl_", 3) == 0)
- _mesa_glsl_error(& loc, state,
- "identifier `%s' uses reserved `gl_' prefix",
- decl->identifier);
- else if (strstr(decl->identifier, "__")) {
- /* From page 14 (page 20 of the PDF) of the GLSL 1.10
- * spec:
- *
- * "In addition, all identifiers containing two
- * consecutive underscores (__) are reserved as
- * possible future keywords."
- */
- _mesa_glsl_error(& loc, state,
- "identifier `%s' uses reserved `__' string",
- decl->identifier);
- }
+ validate_identifier(decl->identifier, loc, state);
/* Add the variable to the symbol table. Note that the initializer's
* IR was already processed earlier (though it hasn't been emitted
const char *name = NULL;
YYLTYPE loc = this->get_location();
- type = this->type->specifier->glsl_type(& name, state);
+ type = this->type->glsl_type(& name, state);
if (type == NULL) {
if (name != NULL) {
type = process_array_type(&loc, type, this->array_size, state);
}
- if (!type->is_error() && type->array_size() == 0) {
+ if (!type->is_error() && type->is_unsized_array()) {
_mesa_glsl_error(&loc, state, "arrays passed as parameters must have "
- "a declared size.");
+ "a declared size");
type = glsl_type::error_type;
}
* for function parameters the default mode is 'in'.
*/
apply_type_qualifier_to_variable(& this->type->qualifier, var, state, & loc,
- false, true);
+ true);
/* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
*
if ((var->mode == ir_var_function_inout || var->mode == ir_var_function_out)
&& type->is_array()
&& !state->check_version(120, 100, &loc,
- "Arrays cannot be out or inout parameters")) {
+ "arrays cannot be out or inout parameters")) {
type = glsl_type::error_type;
}
"function body", name);
}
- /* From page 15 (page 21 of the PDF) of the GLSL 1.10 spec,
- *
- * "Identifiers starting with "gl_" are reserved for use by
- * OpenGL, and may not be declared in a shader as either a
- * variable or a function."
- */
- if (strncmp(name, "gl_", 3) == 0) {
- YYLTYPE loc = this->get_location();
- _mesa_glsl_error(&loc, state,
- "identifier `%s' uses reserved `gl_' prefix", name);
- }
+ validate_identifier(name, this->get_location(), state);
/* Convert the list of function parameters to HIR now so that they can be
* used below to compare this function's signature with previously seen
const char *return_type_name;
const glsl_type *return_type =
- this->return_type->specifier->glsl_type(& return_type_name, state);
+ this->return_type->glsl_type(& return_type_name, state);
if (!return_type) {
YYLTYPE loc = this->get_location();
"function `%s' return type has qualifiers", name);
}
+ /* Section 6.1 (Function Definitions) of the GLSL 1.20 spec says:
+ *
+ * "Arrays are allowed as arguments and as the return type. In both
+ * cases, the array must be explicitly sized."
+ */
+ if (return_type->is_unsized_array()) {
+ YYLTYPE loc = this->get_location();
+ _mesa_glsl_error(& loc, state,
+ "function `%s' return type array must be explicitly "
+ "sized", name);
+ }
+
/* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
*
* "[Sampler types] can only be declared as function parameters
*/
f = state->symbols->get_function(name);
if (f != NULL && (state->es_shader || f->has_user_signature())) {
- sig = f->exact_matching_signature(&hir_parameters);
+ sig = f->exact_matching_signature(state, &hir_parameters);
if (sig != NULL) {
const char *badvar = sig->qualifiers_match(&hir_parameters);
if (badvar != NULL) {
assert(state->current_function);
if (opt_return_value) {
- ir_rvalue *const ret = opt_return_value->hir(instructions, state);
+ ir_rvalue *ret = opt_return_value->hir(instructions, state);
/* The value of the return type can be NULL if the shader says
* 'return foo();' and foo() is a function that returns void.
const glsl_type *const ret_type =
(ret == NULL) ? glsl_type::void_type : ret->type;
- /* Implicit conversions are not allowed for return values. */
- if (state->current_function->return_type != ret_type) {
+ /* Implicit conversions are not allowed for return values prior to
+ * ARB_shading_language_420pack.
+ */
+ if (state->current_function->return_type != ret_type) {
YYLTYPE loc = this->get_location();
- _mesa_glsl_error(& loc, state,
- "`return' with wrong type %s, in function `%s' "
- "returning %s",
- ret_type->name,
- state->current_function->function_name(),
- state->current_function->return_type->name);
- }
+ if (state->ARB_shading_language_420pack_enable) {
+ if (!apply_implicit_conversion(state->current_function->return_type,
+ ret, state)) {
+ _mesa_glsl_error(& loc, state,
+ "could not implicitly convert return value "
+ "to %s, in function `%s'",
+ state->current_function->return_type->name,
+ state->current_function->function_name());
+ }
+ } else {
+ _mesa_glsl_error(& loc, state,
+ "`return' with wrong type %s, in function `%s' "
+ "returning %s",
+ ret_type->name,
+ state->current_function->function_name(),
+ state->current_function->return_type->name);
+ }
+ } else if (state->current_function->return_type->base_type ==
+ GLSL_TYPE_VOID) {
+ YYLTYPE loc = this->get_location();
+
+ /* The ARB_shading_language_420pack, GLSL ES 3.0, and GLSL 4.20
+ * specs add a clarification:
+ *
+ * "A void function can only use return without a return argument, even if
+ * the return argument has void type. Return statements only accept values:
+ *
+ * void func1() { }
+ * void func2() { return func1(); } // illegal return statement"
+ */
+ _mesa_glsl_error(& loc, state,
+ "void functions can only use `return' without a "
+ "return argument");
+ }
inst = new(ctx) ir_return(ret);
} else {
* version.
*/
static bool
-is_valid_default_precision_type(const struct _mesa_glsl_parse_state *state,
- const char *type_name)
+is_valid_default_precision_type(const struct glsl_type *const type)
{
- const struct glsl_type *type = state->symbols->get_type(type_name);
if (type == NULL)
return false;
ast_type_specifier::hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state)
{
- if (!this->is_precision_statement && this->structure == NULL)
+ if (this->default_precision == ast_precision_none && this->structure == NULL)
return NULL;
YYLTYPE loc = this->get_location();
- if (this->precision != ast_precision_none
- && !state->check_precision_qualifiers_allowed(&loc)) {
- return NULL;
- }
- if (this->precision != ast_precision_none
- && this->structure != NULL) {
- _mesa_glsl_error(&loc, state,
- "precision qualifiers do not apply to structures");
- return NULL;
- }
-
/* If this is a precision statement, check that the type to which it is
* applied is either float or int.
*
* field can be either int or float [...]. Any other types or
* qualifiers will result in an error.
*/
- if (this->is_precision_statement) {
- assert(this->precision != ast_precision_none);
- assert(this->structure == NULL); /* The check for structures was
- * performed above. */
+ if (this->default_precision != ast_precision_none) {
+ if (!state->check_precision_qualifiers_allowed(&loc))
+ return NULL;
+
+ if (this->structure != NULL) {
+ _mesa_glsl_error(&loc, state,
+ "precision qualifiers do not apply to structures");
+ return NULL;
+ }
+
if (this->is_array) {
_mesa_glsl_error(&loc, state,
"default precision statements do not apply to "
"arrays");
return NULL;
}
- if (!is_valid_default_precision_type(state, this->type_name)) {
+
+ const struct glsl_type *const type =
+ state->symbols->get_type(this->type_name);
+ if (!is_valid_default_precision_type(type)) {
_mesa_glsl_error(&loc, state,
- "default precision statements apply only to types "
+ "default precision statements apply only to "
"float, int, and sampler types");
return NULL;
}
+ if (type->base_type == GLSL_TYPE_FLOAT
+ && state->es_shader
+ && state->target == fragment_shader) {
+ /* Section 4.5.3 (Default Precision Qualifiers) of the GLSL ES 1.00
+ * spec says:
+ *
+ * "The fragment language has no default precision qualifier for
+ * floating point types."
+ *
+ * As a result, we have to track whether or not default precision has
+ * been specified for float in GLSL ES fragment shaders.
+ *
+ * Earlier in that same section, the spec says:
+ *
+ * "Non-precision qualified declarations will use the precision
+ * qualifier specified in the most recent precision statement
+ * that is still in scope. The precision statement has the same
+ * scoping rules as variable declarations. If it is declared
+ * inside a compound statement, its effect stops at the end of
+ * the innermost statement it was declared in. Precision
+ * statements in nested scopes override precision statements in
+ * outer scopes. Multiple precision statements for the same basic
+ * type can appear inside the same scope, with later statements
+ * overriding earlier statements within that scope."
+ *
+ * Default precision specifications follow the same scope rules as
+ * variables. So, we can track the state of the default float
+ * precision in the symbol table, and the rules will just work. This
+ * is a slight abuse of the symbol table, but it has the semantics
+ * that we want.
+ */
+ ir_variable *const junk =
+ new(state) ir_variable(type, "#default precision",
+ ir_var_temporary);
+
+ state->symbols->add_variable(junk);
+ }
+
/* FINISHME: Translate precision statements into IR. */
return NULL;
}
- if (this->structure != NULL)
+ /* _mesa_ast_set_aggregate_type() sets the <structure> field so that
+ * process_record_constructor() can do type-checking on C-style initializer
+ * expressions of structs, but ast_struct_specifier should only be translated
+ * to HIR if it is declaring the type of a structure.
+ *
+ * The ->is_declaration field is false for initializers of variables
+ * declared separately from the struct's type definition.
+ *
+ * struct S { ... }; (is_declaration = true)
+ * struct T { ... } t = { ... }; (is_declaration = true)
+ * S s = { ... }; (is_declaration = false)
+ */
+ if (this->structure != NULL && this->structure->is_declaration)
return this->structure->hir(instructions, state);
return NULL;
* AST for each can be processed the same way into a set of
* \c glsl_struct_field to describe the members.
*
+ * If we're processing an interface block, var_mode should be the type of the
+ * interface block (ir_var_shader_in, ir_var_shader_out, or ir_var_uniform).
+ * If we're processing a structure, var_mode should be ir_var_auto.
+ *
* \return
* The number of fields processed. A pointer to the array structure fields is
* stored in \c *fields_ret.
YYLTYPE &loc,
glsl_struct_field **fields_ret,
bool is_interface,
- bool block_row_major)
+ bool block_row_major,
+ bool allow_reserved_names,
+ ir_variable_mode var_mode)
{
unsigned decl_count = 0;
* embedded structure definitions have been removed from the language.
*/
if (state->es_shader && decl_list->type->specifier->structure != NULL) {
- _mesa_glsl_error(&loc, state, "Embedded structure definitions are "
- "not allowed in GLSL ES 1.00.");
+ _mesa_glsl_error(&loc, state, "embedded structure definitions are "
+ "not allowed in GLSL ES 1.00");
}
const glsl_type *decl_type =
- decl_list->type->specifier->glsl_type(& type_name, state);
+ decl_list->type->glsl_type(& type_name, state);
foreach_list_typed (ast_declaration, decl, link,
&decl_list->declarations) {
+ if (!allow_reserved_names)
+ validate_identifier(decl->identifier, loc, state);
+
/* From the GL_ARB_uniform_buffer_object spec:
*
* "Sampler types are not allowed inside of uniform
if (is_interface && field_type->contains_sampler()) {
YYLTYPE loc = decl_list->get_location();
_mesa_glsl_error(&loc, state,
- "Uniform in non-default uniform block contains sampler\n");
+ "uniform in non-default uniform block contains sampler");
+ }
+
+ if (field_type->contains_atomic()) {
+ /* FINISHME: Add a spec quotation here once updated spec
+ * FINISHME: language is available. See Khronos bug #10903
+ * FINISHME: on whether atomic counters are allowed in
+ * FINISHME: structures.
+ */
+ YYLTYPE loc = decl_list->get_location();
+ _mesa_glsl_error(&loc, state, "atomic counter in structure or "
+ "uniform block");
}
const struct ast_type_qualifier *const qual =
}
fields[i].type = field_type;
fields[i].name = decl->identifier;
+ fields[i].location = -1;
+ fields[i].interpolation =
+ interpret_interpolation_qualifier(qual, var_mode, state, &loc);
+ fields[i].centroid = qual->flags.q.centroid ? 1 : 0;
+ fields[i].sample = qual->flags.q.sample ? 1 : 0;
if (qual->flags.q.row_major || qual->flags.q.column_major) {
- if (!field_type->is_matrix() && !field_type->is_record()) {
+ if (!qual->flags.q.uniform) {
_mesa_glsl_error(&loc, state,
- "uniform block layout qualifiers row_major and "
- "column_major can only be applied to matrix and "
- "structure types");
+ "row_major and column_major can only be "
+ "applied to uniform interface blocks");
} else
- validate_matrix_layout_for_type(state, &loc, field_type);
+ validate_matrix_layout_for_type(state, &loc, field_type, NULL);
}
if (qual->flags.q.uniform && qual->has_interpolation()) {
struct _mesa_glsl_parse_state *state)
{
YYLTYPE loc = this->get_location();
+
+ /* Section 4.1.8 (Structures) of the GLSL 1.10 spec says:
+ *
+ * "Anonymous structures are not supported; so embedded structures must
+ * have a declarator. A name given to an embedded struct is scoped at
+ * the same level as the struct it is embedded in."
+ *
+ * The same section of the GLSL 1.20 spec says:
+ *
+ * "Anonymous structures are not supported. Embedded structures are not
+ * supported.
+ *
+ * struct S { float f; };
+ * struct T {
+ * S; // Error: anonymous structures disallowed
+ * struct { ... }; // Error: embedded structures disallowed
+ * S s; // Okay: nested structures with name are allowed
+ * };"
+ *
+ * The GLSL ES 1.00 and 3.00 specs have similar langauge and examples. So,
+ * we allow embedded structures in 1.10 only.
+ */
+ if (state->language_version != 110 && state->struct_specifier_depth != 0)
+ _mesa_glsl_error(&loc, state,
+ "embedded structure declartions are not allowed");
+
+ state->struct_specifier_depth++;
+
glsl_struct_field *fields;
unsigned decl_count =
ast_process_structure_or_interface_block(instructions,
loc,
&fields,
false,
- false);
+ false,
+ false /* allow_reserved_names */,
+ ir_var_auto);
+
+ validate_identifier(this->name, loc, state);
const glsl_type *t =
glsl_type::get_record_instance(fields, decl_count, this->name);
}
}
+ state->struct_specifier_depth--;
+
/* Structure type definitions do not have r-values.
*/
return NULL;
}
+
+/**
+ * Visitor class which detects whether a given interface block has been used.
+ */
+class interface_block_usage_visitor : public ir_hierarchical_visitor
+{
+public:
+ interface_block_usage_visitor(ir_variable_mode mode, const glsl_type *block)
+ : mode(mode), block(block), found(false)
+ {
+ }
+
+ virtual ir_visitor_status visit(ir_dereference_variable *ir)
+ {
+ if (ir->var->mode == mode && ir->var->get_interface_type() == block) {
+ found = true;
+ return visit_stop;
+ }
+ return visit_continue;
+ }
+
+ bool usage_found() const
+ {
+ return this->found;
+ }
+
+private:
+ ir_variable_mode mode;
+ const glsl_type *block;
+ bool found;
+};
+
+
ir_rvalue *
ast_interface_block::hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state)
packing = GLSL_INTERFACE_PACKING_STD140;
}
+ ir_variable_mode var_mode;
+ const char *iface_type_name;
+ if (this->layout.flags.q.in) {
+ var_mode = ir_var_shader_in;
+ iface_type_name = "in";
+ } else if (this->layout.flags.q.out) {
+ var_mode = ir_var_shader_out;
+ iface_type_name = "out";
+ } else if (this->layout.flags.q.uniform) {
+ var_mode = ir_var_uniform;
+ iface_type_name = "uniform";
+ } else {
+ var_mode = ir_var_auto;
+ iface_type_name = "UNKNOWN";
+ assert(!"interface block layout qualifier not found!");
+ }
+
+ bool redeclaring_per_vertex = strcmp(this->block_name, "gl_PerVertex") == 0;
bool block_row_major = this->layout.flags.q.row_major;
exec_list declared_variables;
glsl_struct_field *fields;
loc,
&fields,
true,
- block_row_major);
+ block_row_major,
+ redeclaring_per_vertex,
+ var_mode);
+
+ if (!redeclaring_per_vertex)
+ validate_identifier(this->block_name, loc, state);
+
+ const glsl_type *earlier_per_vertex = NULL;
+ if (redeclaring_per_vertex) {
+ /* Find the previous declaration of gl_PerVertex. If we're redeclaring
+ * the named interface block gl_in, we can find it by looking at the
+ * previous declaration of gl_in. Otherwise we can find it by looking
+ * at the previous decalartion of any of the built-in outputs,
+ * e.g. gl_Position.
+ *
+ * Also check that the instance name and array-ness of the redeclaration
+ * are correct.
+ */
+ switch (var_mode) {
+ case ir_var_shader_in:
+ if (ir_variable *earlier_gl_in =
+ state->symbols->get_variable("gl_in")) {
+ earlier_per_vertex = earlier_gl_in->get_interface_type();
+ } else {
+ _mesa_glsl_error(&loc, state,
+ "redeclaration of gl_PerVertex input not allowed "
+ "in the %s shader",
+ _mesa_glsl_shader_target_name(state->target));
+ }
+ if (this->instance_name == NULL ||
+ strcmp(this->instance_name, "gl_in") != 0 || !this->is_array) {
+ _mesa_glsl_error(&loc, state,
+ "gl_PerVertex input must be redeclared as "
+ "gl_in[]");
+ }
+ break;
+ case ir_var_shader_out:
+ if (ir_variable *earlier_gl_Position =
+ state->symbols->get_variable("gl_Position")) {
+ earlier_per_vertex = earlier_gl_Position->get_interface_type();
+ } else {
+ _mesa_glsl_error(&loc, state,
+ "redeclaration of gl_PerVertex output not "
+ "allowed in the %s shader",
+ _mesa_glsl_shader_target_name(state->target));
+ }
+ if (this->instance_name != NULL) {
+ _mesa_glsl_error(&loc, state,
+ "gl_PerVertex input may not be redeclared with "
+ "an instance name");
+ }
+ break;
+ default:
+ _mesa_glsl_error(&loc, state,
+ "gl_PerVertex must be declared as an input or an "
+ "output");
+ break;
+ }
+
+ if (earlier_per_vertex == NULL) {
+ /* An error has already been reported. Bail out to avoid null
+ * dereferences later in this function.
+ */
+ return NULL;
+ }
+
+ /* Copy locations from the old gl_PerVertex interface block. */
+ for (unsigned i = 0; i < num_variables; i++) {
+ int j = earlier_per_vertex->field_index(fields[i].name);
+ if (j == -1) {
+ _mesa_glsl_error(&loc, state,
+ "redeclaration of gl_PerVertex must be a subset "
+ "of the built-in members of gl_PerVertex");
+ } else {
+ fields[i].location =
+ earlier_per_vertex->fields.structure[j].location;
+ fields[i].interpolation =
+ earlier_per_vertex->fields.structure[j].interpolation;
+ fields[i].centroid =
+ earlier_per_vertex->fields.structure[j].centroid;
+ fields[i].sample =
+ earlier_per_vertex->fields.structure[j].sample;
+ }
+ }
+
+ /* From section 7.1 ("Built-in Language Variables") of the GLSL 4.10
+ * spec:
+ *
+ * If a built-in interface block is redeclared, it must appear in
+ * the shader before any use of any member included in the built-in
+ * declaration, or a compilation error will result.
+ *
+ * This appears to be a clarification to the behaviour established for
+ * gl_PerVertex by GLSL 1.50, therefore we implement this behaviour
+ * regardless of GLSL version.
+ */
+ interface_block_usage_visitor v(var_mode, earlier_per_vertex);
+ v.run(instructions);
+ if (v.usage_found()) {
+ _mesa_glsl_error(&loc, state,
+ "redeclaration of a built-in interface block must "
+ "appear before any use of any member of the "
+ "interface block");
+ }
+ }
const glsl_type *block_type =
glsl_type::get_interface_instance(fields,
packing,
this->block_name);
- if (!state->symbols->add_interface(block_type->name, block_type, ir_var_uniform)) {
+ if (!state->symbols->add_interface(block_type->name, block_type, var_mode)) {
YYLTYPE loc = this->get_location();
- _mesa_glsl_error(&loc, state, "Uniform block name `%s' already taken in "
- "the current scope.\n", this->block_name);
+ _mesa_glsl_error(&loc, state, "interface block `%s' with type `%s' "
+ "already taken in the current scope",
+ this->block_name, iface_type_name);
}
/* Since interface blocks cannot contain statements, it should be
*/
assert(declared_variables.is_empty());
+ /* From section 4.3.4 (Inputs) of the GLSL 1.50 spec:
+ *
+ * Geometry shader input variables get the per-vertex values written
+ * out by vertex shader output variables of the same names. Since a
+ * geometry shader operates on a set of vertices, each input varying
+ * variable (or input block, see interface blocks below) needs to be
+ * declared as an array.
+ */
+ if (state->target == geometry_shader && !this->is_array &&
+ var_mode == ir_var_shader_in) {
+ _mesa_glsl_error(&loc, state, "geometry shader inputs must be arrays");
+ }
+
/* Page 39 (page 45 of the PDF) of section 4.3.7 in the GLSL ES 3.00 spec
* says:
*
* field selector ( . ) operator (analogously to structures)."
*/
if (this->instance_name) {
+ if (redeclaring_per_vertex) {
+ /* When a built-in in an unnamed interface block is redeclared,
+ * get_variable_being_redeclared() calls
+ * check_builtin_array_max_size() to make sure that built-in array
+ * variables aren't redeclared to illegal sizes. But we're looking
+ * at a redeclaration of a named built-in interface block. So we
+ * have to manually call check_builtin_array_max_size() for all parts
+ * of the interface that are arrays.
+ */
+ for (unsigned i = 0; i < num_variables; i++) {
+ if (fields[i].type->is_array()) {
+ const unsigned size = fields[i].type->array_size();
+ check_builtin_array_max_size(fields[i].name, size, loc, state);
+ }
+ }
+ } else {
+ validate_identifier(this->instance_name, loc, state);
+ }
+
ir_variable *var;
- if (this->array_size != NULL) {
+ if (this->is_array) {
+ /* Section 4.3.7 (Interface Blocks) of the GLSL 1.50 spec says:
+ *
+ * For uniform blocks declared an array, each individual array
+ * element corresponds to a separate buffer object backing one
+ * instance of the block. As the array size indicates the number
+ * of buffer objects needed, uniform block array declarations
+ * must specify an array size.
+ *
+ * And a few paragraphs later:
+ *
+ * Geometry shader input blocks must be declared as arrays and
+ * follow the array declaration and linking rules for all
+ * geometry shader inputs. All other input and output block
+ * arrays must specify an array size.
+ *
+ * The upshot of this is that the only circumstance where an
+ * interface array size *doesn't* need to be specified is on a
+ * geometry shader input.
+ */
+ if (this->array_size == NULL &&
+ (state->target != geometry_shader || !this->layout.flags.q.in)) {
+ _mesa_glsl_error(&loc, state,
+ "only geometry shader inputs may be unsized "
+ "instance block arrays");
+
+ }
+
const glsl_type *block_array_type =
process_array_type(&loc, block_type, this->array_size, state);
var = new(state) ir_variable(block_array_type,
this->instance_name,
- ir_var_uniform);
+ var_mode);
} else {
var = new(state) ir_variable(block_type,
this->instance_name,
- ir_var_uniform);
+ var_mode);
}
- var->interface_type = block_type;
- state->symbols->add_variable(var);
- instructions->push_tail(var);
+ if (state->target == geometry_shader && var_mode == ir_var_shader_in)
+ handle_geometry_shader_input_decl(state, loc, var);
+
+ if (ir_variable *earlier =
+ state->symbols->get_variable(this->instance_name)) {
+ if (!redeclaring_per_vertex) {
+ _mesa_glsl_error(&loc, state, "`%s' redeclared",
+ this->instance_name);
+ }
+ earlier->how_declared = ir_var_declared_normally;
+ earlier->type = var->type;
+ earlier->reinit_interface_type(block_type);
+ delete var;
+ } else {
+ state->symbols->add_variable(var);
+ instructions->push_tail(var);
+ }
} else {
/* In order to have an array size, the block must also be declared with
* an instane name.
*/
- assert(this->array_size == NULL);
+ assert(!this->is_array);
for (unsigned i = 0; i < num_variables; i++) {
ir_variable *var =
new(state) ir_variable(fields[i].type,
ralloc_strdup(state, fields[i].name),
- ir_var_uniform);
- var->interface_type = block_type;
+ var_mode);
+ var->interpolation = fields[i].interpolation;
+ var->centroid = fields[i].centroid;
+ var->sample = fields[i].sample;
+ var->init_interface_type(block_type);
+
+ if (redeclaring_per_vertex) {
+ ir_variable *earlier =
+ get_variable_being_redeclared(var, loc, state,
+ true /* allow_all_redeclarations */);
+ if (strncmp(var->name, "gl_", 3) != 0 || earlier == NULL) {
+ _mesa_glsl_error(&loc, state,
+ "redeclaration of gl_PerVertex can only "
+ "include built-in variables");
+ } else if (earlier->how_declared == ir_var_declared_normally) {
+ _mesa_glsl_error(&loc, state,
+ "`%s' has already been redeclared", var->name);
+ } else {
+ earlier->how_declared = ir_var_declared_in_block;
+ earlier->reinit_interface_type(block_type);
+ }
+ continue;
+ }
+
+ if (state->symbols->get_variable(var->name) != NULL)
+ _mesa_glsl_error(&loc, state, "`%s' redeclared", var->name);
+
+ /* Propagate the "binding" keyword into this UBO's fields;
+ * the UBO declaration itself doesn't get an ir_variable unless it
+ * has an instance name. This is ugly.
+ */
+ var->explicit_binding = this->layout.flags.q.explicit_binding;
+ var->binding = this->layout.binding;
state->symbols->add_variable(var);
instructions->push_tail(var);
}
+
+ if (redeclaring_per_vertex && block_type != earlier_per_vertex) {
+ /* From section 7.1 ("Built-in Language Variables") of the GLSL 4.10 spec:
+ *
+ * It is also a compilation error ... to redeclare a built-in
+ * block and then use a member from that built-in block that was
+ * not included in the redeclaration.
+ *
+ * This appears to be a clarification to the behaviour established
+ * for gl_PerVertex by GLSL 1.50, therefore we implement this
+ * behaviour regardless of GLSL version.
+ *
+ * To prevent the shader from using a member that was not included in
+ * the redeclaration, we disable any ir_variables that are still
+ * associated with the old declaration of gl_PerVertex (since we've
+ * already updated all of the variables contained in the new
+ * gl_PerVertex to point to it).
+ *
+ * As a side effect this will prevent
+ * validate_intrastage_interface_blocks() from getting confused and
+ * thinking there are conflicting definitions of gl_PerVertex in the
+ * shader.
+ */
+ foreach_list_safe(node, instructions) {
+ ir_variable *const var = ((ir_instruction *) node)->as_variable();
+ if (var != NULL &&
+ var->get_interface_type() == earlier_per_vertex &&
+ var->mode == var_mode) {
+ if (var->how_declared == ir_var_declared_normally) {
+ _mesa_glsl_error(&loc, state,
+ "redeclaration of gl_PerVertex cannot "
+ "follow a redeclaration of `%s'",
+ var->name);
+ }
+ state->symbols->disable_variable(var->name);
+ var->remove();
+ }
+ }
+ }
}
return NULL;
}
+
+ir_rvalue *
+ast_gs_input_layout::hir(exec_list *instructions,
+ struct _mesa_glsl_parse_state *state)
+{
+ YYLTYPE loc = this->get_location();
+
+ /* If any geometry input layout declaration preceded this one, make sure it
+ * was consistent with this one.
+ */
+ if (state->gs_input_prim_type_specified &&
+ state->gs_input_prim_type != this->prim_type) {
+ _mesa_glsl_error(&loc, state,
+ "geometry shader input layout does not match"
+ " previous declaration");
+ return NULL;
+ }
+
+ /* If any shader inputs occurred before this declaration and specified an
+ * array size, make sure the size they specified is consistent with the
+ * primitive type.
+ */
+ unsigned num_vertices = vertices_per_prim(this->prim_type);
+ if (state->gs_input_size != 0 && state->gs_input_size != num_vertices) {
+ _mesa_glsl_error(&loc, state,
+ "this geometry shader input layout implies %u vertices"
+ " per primitive, but a previous input is declared"
+ " with size %u", num_vertices, state->gs_input_size);
+ return NULL;
+ }
+
+ state->gs_input_prim_type_specified = true;
+ state->gs_input_prim_type = this->prim_type;
+
+ /* If any shader inputs occurred before this declaration and did not
+ * specify an array size, their size is determined now.
+ */
+ foreach_list (node, instructions) {
+ ir_variable *var = ((ir_instruction *) node)->as_variable();
+ if (var == NULL || var->mode != ir_var_shader_in)
+ continue;
+
+ /* Note: gl_PrimitiveIDIn has mode ir_var_shader_in, but it's not an
+ * array; skip it.
+ */
+
+ if (var->type->is_unsized_array()) {
+ if (var->max_array_access >= num_vertices) {
+ _mesa_glsl_error(&loc, state,
+ "this geometry shader input layout implies %u"
+ " vertices, but an access to element %u of input"
+ " `%s' already exists", num_vertices,
+ var->max_array_access, var->name);
+ } else {
+ var->type = glsl_type::get_array_instance(var->type->fields.array,
+ num_vertices);
+ }
+ }
+ }
+
+ return NULL;
+}
+
+
static void
detect_conflicting_assignments(struct _mesa_glsl_parse_state *state,
exec_list *instructions)
*/
if (gl_FragColor_assigned && gl_FragData_assigned) {
_mesa_glsl_error(&loc, state, "fragment shader writes to both "
- "`gl_FragColor' and `gl_FragData'\n");
+ "`gl_FragColor' and `gl_FragData'");
} else if (gl_FragColor_assigned && user_defined_fs_output_assigned) {
_mesa_glsl_error(&loc, state, "fragment shader writes to both "
- "`gl_FragColor' and `%s'\n",
+ "`gl_FragColor' and `%s'",
user_defined_fs_output->name);
} else if (gl_FragData_assigned && user_defined_fs_output_assigned) {
_mesa_glsl_error(&loc, state, "fragment shader writes to both "
- "`gl_FragData' and `%s'\n",
+ "`gl_FragData' and `%s'",
user_defined_fs_output->name);
}
}
+
+
+static void
+remove_per_vertex_blocks(exec_list *instructions,
+ _mesa_glsl_parse_state *state, ir_variable_mode mode)
+{
+ /* Find the gl_PerVertex interface block of the appropriate (in/out) mode,
+ * if it exists in this shader type.
+ */
+ const glsl_type *per_vertex = NULL;
+ switch (mode) {
+ case ir_var_shader_in:
+ if (ir_variable *gl_in = state->symbols->get_variable("gl_in"))
+ per_vertex = gl_in->get_interface_type();
+ break;
+ case ir_var_shader_out:
+ if (ir_variable *gl_Position =
+ state->symbols->get_variable("gl_Position")) {
+ per_vertex = gl_Position->get_interface_type();
+ }
+ break;
+ default:
+ assert(!"Unexpected mode");
+ break;
+ }
+
+ /* If we didn't find a built-in gl_PerVertex interface block, then we don't
+ * need to do anything.
+ */
+ if (per_vertex == NULL)
+ return;
+
+ /* If the interface block is used by the shader, then we don't need to do
+ * anything.
+ */
+ interface_block_usage_visitor v(mode, per_vertex);
+ v.run(instructions);
+ if (v.usage_found())
+ return;
+
+ /* Remove any ir_variable declarations that refer to the interface block
+ * we're removing.
+ */
+ foreach_list_safe(node, instructions) {
+ ir_variable *const var = ((ir_instruction *) node)->as_variable();
+ if (var != NULL && var->get_interface_type() == per_vertex &&
+ var->mode == mode) {
+ state->symbols->disable_variable(var->name);
+ var->remove();
+ }
+ }
+}
projects / mesa.git / blobdiff