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glsl: stop adding pointers from glsl_struct_field to the cache

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This is so we always create reproducible cache entries. Consistency
is required for verification of any third party distributed shaders.

Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
This commit is contained in:
Timothy Arceri
2017-08-11 14:01:34 +10:00
parent 37d453b55a
commit 073a84ff60
1 changed files with 38 additions and 7 deletions
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45
src/compiler/glsl/shader_cache.cpp
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@@ -74,6 +74,17 @@ compile_shaders(struct gl_context *ctx, struct gl_shader_program *prog) {
}
}
static void
get_struct_type_field_and_pointer_sizes(size_t *s_field_size,
size_t *s_field_ptrs,
unsigned num_fields)
{
*s_field_size = sizeof(glsl_struct_field) * num_fields;
*s_field_ptrs =
sizeof(((glsl_struct_field *)0)->type) +
sizeof(((glsl_struct_field *)0)->name);
}
static void
encode_type_to_blob(struct blob *blob, const glsl_type *type)
{
@@ -127,11 +138,19 @@ encode_type_to_blob(struct blob *blob, const glsl_type *type)
blob_write_uint32(blob, (type->base_type) << 24);
blob_write_string(blob, type->name);
blob_write_uint32(blob, type->length);
blob_write_bytes(blob, type->fields.structure,
sizeof(glsl_struct_field) * type->length);
size_t s_field_size, s_field_ptrs;
get_struct_type_field_and_pointer_sizes(&s_field_size, &s_field_ptrs,
type->length);
for (unsigned i = 0; i < type->length; i++) {
encode_type_to_blob(blob, type->fields.structure[i].type);
blob_write_string(blob, type->fields.structure[i].name);
/* Write the struct field skipping the pointers */
blob_write_bytes(blob,
((char *)&type->fields.structure[i]) + s_field_ptrs,
s_field_size - s_field_ptrs);
}
if (type->is_interface()) {
@@ -192,22 +211,34 @@ decode_type_from_blob(struct blob_reader *blob)
case GLSL_TYPE_INTERFACE: {
char *name = blob_read_string(blob);
unsigned num_fields = blob_read_uint32(blob);
glsl_struct_field *fields = (glsl_struct_field *)
blob_read_bytes(blob, sizeof(glsl_struct_field) * num_fields);
size_t s_field_size, s_field_ptrs;
get_struct_type_field_and_pointer_sizes(&s_field_size, &s_field_ptrs,
num_fields);
glsl_struct_field *fields =
(glsl_struct_field *) malloc(s_field_size * num_fields);
for (unsigned i = 0; i < num_fields; i++) {
fields[i].type = decode_type_from_blob(blob);
fields[i].name = blob_read_string(blob);
blob_copy_bytes(blob, ((uint8_t *) &fields[i]) + s_field_ptrs,
s_field_size - s_field_ptrs);
}
const glsl_type *t;
if (base_type == GLSL_TYPE_INTERFACE) {
enum glsl_interface_packing packing =
(glsl_interface_packing) blob_read_uint32(blob);
bool row_major = blob_read_uint32(blob);
return glsl_type::get_interface_instance(fields, num_fields,
packing, row_major, name);
t = glsl_type::get_interface_instance(fields, num_fields, packing,
row_major, name);
} else {
return glsl_type::get_record_instance(fields, num_fields, name);
t = glsl_type::get_record_instance(fields, num_fields, name);
}
free(fields);
return t;
}
case GLSL_TYPE_VOID:
case GLSL_TYPE_ERROR: