static void test_flatten(skiatest::Reporter* reporter, const SkMatrix& m) {
// add 100 in case we have a bug, I don't want to kill my stack in the test
char buffer[SkMatrix::kMaxFlattenSize + 100];
uint32_t size1 = m.flatten(NULL);
uint32_t size2 = m.flatten(buffer);
REPORTER_ASSERT(reporter, size1 == size2);
REPORTER_ASSERT(reporter, size1 <= SkMatrix::kMaxFlattenSize);
SkMatrix m2;
uint32_t size3 = m2.unflatten(buffer);
REPORTER_ASSERT(reporter, size1 == size2);
REPORTER_ASSERT(reporter, m == m2);
char buffer2[SkMatrix::kMaxFlattenSize + 100];
size3 = m2.flatten(buffer2);
REPORTER_ASSERT(reporter, size1 == size2);
REPORTER_ASSERT(reporter, memcmp(buffer, buffer2, size1) == 0);
}
void SkWriteMatrix(SkWriter32* writer, const SkMatrix& matrix) {
size_t size = matrix.flatten(NULL);
SkASSERT(SkAlign4(size) == size);
matrix.flatten(writer->reserve(size));
}