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[repacker] add ext promotion test.

This commit is contained in:
Garret Rieger 2022-07-22 21:04:34 +00:00
parent c38896e07c
commit 7de136f8a8
3 changed files with 135 additions and 7 deletions
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2
src/graph/gsubgpos-graph.hh
View File

@ -86,7 +86,7 @@ struct Lookup : public OT::Lookup
}
DEBUG_MSG (SUBSET_REPACK, nullptr,
"Promoting lookup type %u (obj %u) to extension.\n",
"Promoting lookup type %u (obj %u) to extension.",
type,
this_index);

3
src/hb-repacker.hh
View File

@ -45,6 +45,9 @@ inline int compare_sizes (const void* a, const void* b)
{
hb_pair_t<unsigned, size_t>* size_a = (hb_pair_t<unsigned, size_t>*) a;
hb_pair_t<unsigned, size_t>* size_b = (hb_pair_t<unsigned, size_t>*) b;
if (size_a->second == size_b->second) {
return size_b->first - size_a->first;
}
return size_a->second - size_b->second;
}

137
src/test-repacker.cc
View File

@ -30,16 +30,22 @@
#include "hb-open-type.hh"
#include "graph/serialize.hh"
static void extend (const char* value,
unsigned len,
hb_serialize_context_t* c)
{
char* obj = c->allocate_size<char> (len);
memcpy (obj, value, len);
}
static void start_object(const char* tag,
unsigned len,
hb_serialize_context_t* c)
{
c->push ();
char* obj = c->allocate_size<char> (len);
strncpy (obj, tag, len);
extend (tag, len, c);
}
static unsigned add_object(const char* tag,
unsigned len,
hb_serialize_context_t* c)
@ -76,7 +82,8 @@ static void add_wide_offset (unsigned id,
static void run_resolve_overflow_test (const char* name,
hb_serialize_context_t& overflowing,
hb_serialize_context_t& expected,
unsigned num_iterations = 0)
unsigned num_iterations = 0,
bool recalculate_extensions = false)
{
printf (">>> Testing overflowing resolution for %s\n",
name);
@ -86,7 +93,9 @@ static void run_resolve_overflow_test (const char* name,
assert (overflowing.offset_overflow ());
hb_blob_t* out = hb_resolve_overflows (overflowing.object_graph (),
HB_TAG ('G', 'S', 'U', 'B'), num_iterations);
HB_TAG ('G', 'S', 'U', 'B'),
num_iterations,
recalculate_extensions);
assert (out);
hb_bytes_t result = out->as_bytes ();
@ -95,11 +104,21 @@ static void run_resolve_overflow_test (const char* name,
hb_bytes_t expected_result = expected.copy_bytes ();
assert (result.length == expected_result.length);
bool equal = true;
for (unsigned i = 0; i < expected_result.length; i++)
{
assert (result[i] == expected_result[i]);
if (result[i] != expected_result[i])
{
equal = false;
uint8_t a = result[i];
uint8_t b = expected_result[i];
printf("%08u: %x != %x\n", i, a, b);
}
}
assert (equal);
expected_result.fini ();
hb_blob_destroy (out);
}
@ -865,6 +884,89 @@ populate_serializer_with_24_and_32_bit_offsets (hb_serialize_context_t* c)
c->end_serialize();
}
static void
populate_serializer_with_extension_promotion (hb_serialize_context_t* c,
int num_extensions = 0)
{
constexpr int num_lookups = 5;
constexpr int num_subtables = num_lookups * 2;
unsigned int lookups[num_lookups];
unsigned int subtables[num_subtables];
unsigned int extensions[num_subtables];
std::string large_string(60000, 'a');
c->start_serialize<char> ();
for (int i = num_subtables - 1; i >= 0; i--)
subtables[i] = add_object(large_string.c_str (), 15000, c);
for (int i = num_subtables - 1;
i >= (num_lookups - num_extensions) * 2;
i--)
{
char ext[] = {
0, 1,
0, 5
};
unsigned ext_index = i - (num_lookups - num_extensions) * 2; // 5
unsigned subtable_index = num_subtables - ext_index - 1; // 10 - 5 - 1 = 4
start_object (ext, 4, c);
add_wide_offset (subtables[subtable_index], c);
extensions[i] = c->pop_pack (false);
}
for (int i = num_lookups - 1; i >= 0; i--)
{
bool is_ext = (i >= (num_lookups - num_extensions));
char lookup[] = {
0, is_ext ? (char) 7 : (char) 5, // type
0, 0, // flag
0, 2, // num subtables
};
start_object (lookup, 6, c);
if (is_ext) {
add_offset (extensions[i * 2], c);
add_offset (extensions[i * 2 + 1], c);
} else {
add_offset (subtables[i * 2], c);
add_offset (subtables[i * 2 + 1], c);
}
char filter[] = {0, 0};
extend (filter, 2, c);
lookups[i] = c->pop_pack (false);
}
char lookup_count[] = {0, num_lookups};
start_object ((char *) &lookup_count, 2, c);
for (int i = 0; i < num_lookups; i++)
add_offset (lookups[i], c);
unsigned lookup_list = c->pop_pack (false);
char gsub_header[] = {
0, 1, // major
0, 0, // minor
0, 0, // script list
0, 0, // feature list
};
start_object (gsub_header, 8, c);
add_offset (lookup_list, c);
c->pop_pack (false);
c->end_serialize();
}
static void test_sort_shortest ()
{
size_t buffer_size = 100;
@ -1212,6 +1314,28 @@ static void test_resolve_mixed_overflows_via_isolation_spaces ()
hb_blob_destroy (out);
}
static void test_resolve_with_extension_promotion ()
{
size_t buffer_size = 200000;
void* buffer = malloc (buffer_size);
assert (buffer);
hb_serialize_context_t c (buffer, buffer_size);
populate_serializer_with_extension_promotion (&c);
void* expected_buffer = malloc (buffer_size);
assert (expected_buffer);
hb_serialize_context_t e (expected_buffer, buffer_size);
populate_serializer_with_extension_promotion (&e, 3);
run_resolve_overflow_test ("test_resolve_with_extension_promotion",
c,
e,
20,
true);
free (buffer);
free (expected_buffer);
}
static void test_resolve_overflows_via_splitting_spaces ()
{
size_t buffer_size = 160000;
@ -1358,4 +1482,5 @@ main (int argc, char **argv)
test_duplicate_interior ();
test_virtual_link ();
test_shared_node_with_virtual_links ();
test_resolve_with_extension_promotion ();
}