De-duplicate the wuffs_gif_decode test function
diff --git a/test/c/std/gif.c b/test/c/std/gif.c
index 5fc9561..bbf3dbb 100644
--- a/test/c/std/gif.c
+++ b/test/c/std/gif.c
@@ -205,54 +205,9 @@
CHECK_STATUS("initialize",
wuffs_gif__decoder__initialize(&dec, sizeof dec, WUFFS_VERSION,
wuffs_initialize_flags));
-
- wuffs_base__image_config ic = ((wuffs_base__image_config){});
- wuffs_base__frame_config fc = ((wuffs_base__frame_config){});
-
- uint32_t bits_per_pixel = wuffs_base__pixel_format__bits_per_pixel(&pixfmt);
- if (bits_per_pixel == 0) {
- return "do_run__wuffs_base__image_decoder: invalid bits_per_pixel";
- } else if ((bits_per_pixel % 8) != 0) {
- return "do_run__wuffs_base__image_decoder: cannot bench fractional bytes";
- }
- uint64_t bytes_per_pixel = bits_per_pixel / 8;
-
- CHECK_STATUS("decode_image_config",
- wuffs_gif__decoder__decode_image_config(&dec, &ic, src));
-
- wuffs_base__pixel_config__set(&ic.pixcfg, pixfmt.repr,
- WUFFS_BASE__PIXEL_SUBSAMPLING__NONE,
- wuffs_base__pixel_config__width(&ic.pixcfg),
- wuffs_base__pixel_config__height(&ic.pixcfg));
-
- wuffs_base__pixel_buffer pb = ((wuffs_base__pixel_buffer){});
- CHECK_STATUS("set_from_slice", wuffs_base__pixel_buffer__set_from_slice(
- &pb, &ic.pixcfg, g_pixel_slice_u8));
-
- while (true) {
- wuffs_base__status status =
- wuffs_gif__decoder__decode_frame_config(&dec, &fc, src);
- if (status.repr == wuffs_base__note__end_of_data) {
- break;
- }
- CHECK_STATUS("decode_frame_config", status);
-
- CHECK_STATUS("decode_frame",
- wuffs_gif__decoder__decode_frame(&dec, &pb, src,
- WUFFS_BASE__PIXEL_BLEND__SRC,
- g_work_slice_u8, NULL));
-
- if (n_bytes_out) {
- uint64_t frame_width = wuffs_base__frame_config__width(&fc);
- uint64_t frame_height = wuffs_base__frame_config__height(&fc);
- *n_bytes_out += frame_width * frame_height * bytes_per_pixel;
- }
- if (dst) {
- CHECK_STRING(copy_to_io_buffer_from_pixel_buffer(
- dst, &pb, wuffs_base__frame_config__bounds(&fc)));
- }
- }
- return NULL;
+ return do_run__wuffs_base__image_decoder(
+ wuffs_gif__decoder__upcast_as__wuffs_base__image_decoder(&dec),
+ n_bytes_out, dst, pixfmt, src);
}
const char* //
