[libpng16] Made transform implementation functions static. This makes the
internal functions called by png_do_{read|write}_transformations static. On an
x86-64 DLL build (Gentoo Linux) this reduces the size of the text
segment of the DLL by 1208 bytes, about 0.6%. It also simplifies
maintenance by removing the declarations from pngpriv.h and allowing
easier changes to the internal interfaces.
diff --git a/pngwtran.c b/pngwtran.c
index 523f244..210a415 100644
--- a/pngwtran.c
+++ b/pngwtran.c
@@ -21,7 +21,7 @@
* row_info bit depth should be 8 (one pixel per byte). The channels
* should be 1 (this only happens on grayscale and paletted images).
*/
-void /* PRIVATE */
+static void
png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth)
{
png_debug(1, "in png_do_pack");
@@ -166,7 +166,7 @@
* would pass 3 as bit_depth, and this routine would translate the
* data to 0 to 15.
*/
-void /* PRIVATE */
+static void
png_do_shift(png_row_infop row_info, png_bytep row,
png_const_color_8p bit_depth)
{
@@ -305,7 +305,7 @@
#endif
#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED
-void /* PRIVATE */
+static void
png_do_write_swap_alpha(png_row_infop row_info, png_bytep row)
{
png_debug(1, "in png_do_write_swap_alpha");
@@ -399,7 +399,7 @@
#endif
#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED
-void /* PRIVATE */
+static void
png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
{
png_debug(1, "in png_do_write_invert_alpha");