util/format: expose generated format packing functions through a header

Some of the generated functions can be useful without going through the
format table (filling border color struct in turnip). By not calling these
functions through the format table, we should eventually be able to garbage
collect the unused packing functions, and also allows LTOs to happen.

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6093>

src/util/format/u_format_pack.py

@@ -49,7 +49,6 @@ if sys.version_info < (3, 0):
 else:
     integer_types = (int, )
 
-
 def inv_swizzles(swizzles):
     '''Return an array[4] of inverse swizzle terms'''
     '''Only pick the first matching value to avoid l8 getting blue and i8 getting alpha'''
@@ -658,9 +657,11 @@ def generate_format_pack(format, src_channel, src_native_type, src_suffix):
 
     name = format.short_name()
 
-    print('static inline void')
+    print('void')
     print('util_format_%s_pack_%s(uint8_t *dst_row, unsigned dst_stride, const %s *src_row, unsigned src_stride, unsigned width, unsigned height)' % (name, src_suffix, src_native_type))
     print('{')
+
+    print('void util_format_%s_pack_%s(uint8_t *dst_row, unsigned dst_stride, const %s *src_row, unsigned src_stride, unsigned width, unsigned height);' % (name, src_suffix, src_native_type), file=sys.stdout2)
     
     if is_format_supported(format):
         print('   unsigned x, y;')
@@ -712,6 +713,7 @@ def generate(formats):
     print('#include "util/format_srgb.h"')
     print('#include "u_format_yuv.h"')
     print('#include "u_format_zs.h"')
+    print('#include "u_format_pack.h"')
     print()
 
     for format in formats:
@@ -761,4 +763,3 @@ def generate(formats):
 
                 generate_format_unpack(format, channel, native_type, suffix)
                 generate_format_pack(format, channel, native_type, suffix)
-