Bilinear interpolation precision is now configurable at compile time

Macro BILINEAR_INTERPOLATION_BITS in pixman-private.h selects
the number of fractional bits used for bilinear interpolation.

scaling-test and affine-test have checksums for 4-bit, 7-bit
and 8-bit configurations.

2 files changed, 22 insertions, 2 deletions

diff --git a/test/affine-test.c b/test/affine-test.c
index a4ceed3..6827cc3 100644
--- a/test/affine-test.c
+++ b/test/affine-test.c
@@ -301,11 +301,21 @@ test_composite (int      testnum,
     return crc32;
 }
 
+#if BILINEAR_INTERPOLATION_BITS == 8
+#define CHECKSUM 0x1EF2175A
+#elif BILINEAR_INTERPOLATION_BITS == 7
+#define CHECKSUM 0x74050F50
+#elif BILINEAR_INTERPOLATION_BITS == 4
+#define CHECKSUM 0x4362EAE8
+#else
+#define CHECKSUM 0x00000000
+#endif
+
 int
 main (int argc, const char *argv[])
 {
     pixman_disable_out_of_bounds_workaround ();
 
-    return fuzzer_test_main ("affine", 8000000, 0x1EF2175A,
+    return fuzzer_test_main ("affine", 8000000, CHECKSUM,
 			     test_composite, argc, argv);
 }
diff --git a/test/scaling-test.c b/test/scaling-test.c
index 6f2da14..44c4f3d 100644
--- a/test/scaling-test.c
+++ b/test/scaling-test.c
@@ -357,11 +357,21 @@ test_composite (int      testnum,
     return crc32;
 }
 
+#if BILINEAR_INTERPOLATION_BITS == 8
+#define CHECKSUM 0x80DF1CB2
+#elif BILINEAR_INTERPOLATION_BITS == 7
+#define CHECKSUM 0x2818D5FB
+#elif BILINEAR_INTERPOLATION_BITS == 4
+#define CHECKSUM 0x387540A5
+#else
+#define CHECKSUM 0x00000000
+#endif
+
 int
 main (int argc, const char *argv[])
 {
     pixman_disable_out_of_bounds_workaround ();
 
-    return fuzzer_test_main("scaling", 8000000, 0x80DF1CB2,
+    return fuzzer_test_main("scaling", 8000000, CHECKSUM,
 			    test_composite, argc, argv);
 }