mewin/libpng
1
0
Fork 0
mirror of https://git.code.sf.net/p/libpng/code.git synced 2025-07-10 18:04:09 +02:00
Code Issues Projects Releases Wiki Activity

Imported from libpng-0.85.tar

Browse Source
This commit is contained in:
Guy Schalnat
1995-12-19 03:22:19 -06:00
committed by Glenn Randers-Pehrson
parent 0f71645dfe
commit 6d76471acd
24 changed files with 3505 additions and 2324 deletions
Download Patch File Download Diff File Expand all files Collapse all files

45
pngwtran.c
View File

@@ -1,10 +1,10 @@
/* pngwtran.c - transforms the data in a row for png writers
libpng 1.0 beta 2 - version 0.81
libpng 1.0 beta 2 - version 0.85
For conditions of distribution and use, see copyright notice in png.h
Copyright (c) 1995 Guy Eric Schalnat, Group 42, Inc.
August 24, 1995
December 19, 1995
*/
#define PNG_INTERNAL
@@ -13,10 +13,10 @@
/* transform the data according to the users wishes. The order of
transformations is significant. */
void
png_do_write_transformations(png_struct *png_ptr)
png_do_write_transformations(png_structp png_ptr)
{
#if defined(PNG_WRITE_FILLER_SUPPORTED)
if (png_ptr->transformations & PNG_RGBA)
if (png_ptr->transformations & PNG_FILLER)
png_do_write_filler(&(png_ptr->row_info), png_ptr->row_buf + 1,
png_ptr->filler_loc);
#endif
@@ -49,7 +49,7 @@ png_do_write_transformations(png_struct *png_ptr)
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
png_do_pack(png_row_info *row_info, png_bytef *row, png_byte bit_depth)
png_do_pack(png_row_infop row_info, png_bytep row, png_byte bit_depth)
{
if (row_info && row && row_info->bit_depth == 8 &&
row_info->channels == 1)
@@ -58,10 +58,10 @@ png_do_pack(png_row_info *row_info, png_bytef *row, png_byte bit_depth)
{
case 1:
{
png_bytef *sp;
png_bytef *dp;
int mask;
png_int_32 i;
png_bytep sp;
png_bytep dp;
int mask;
png_int_32 i;
int v;
sp = row;
@@ -79,7 +79,7 @@ png_do_pack(png_row_info *row_info, png_bytef *row, png_byte bit_depth)
{
mask = 0x80;
*dp = v;
dp++;
dp++;
v = 0;
}
}
@@ -89,8 +89,8 @@ png_do_pack(png_row_info *row_info, png_bytef *row, png_byte bit_depth)
}
case 2:
{
png_bytef *sp;
png_bytef *dp;
png_bytep sp;
png_bytep dp;
int shift;
png_int_32 i;
int v;
@@ -121,8 +121,8 @@ png_do_pack(png_row_info *row_info, png_bytef *row, png_byte bit_depth)
}
case 4:
{
png_bytef *sp;
png_bytef *dp;
png_bytep sp;
png_bytep dp;
int shift;
png_int_32 i;
int v;
@@ -170,7 +170,7 @@ png_do_pack(png_row_info *row_info, png_bytef *row, png_byte bit_depth)
would pass 3 as bit_depth, and this routine would translate the
data to 0 to 15. */
void
png_do_shift(png_row_info *row_info, png_bytef *row, png_color_8 *bit_depth)
png_do_shift(png_row_infop row_info, png_bytep row, png_color_8p bit_depth)
{
if (row && row_info &&
row_info->color_type != PNG_COLOR_TYPE_PALETTE)
@@ -207,7 +207,7 @@ png_do_shift(png_row_info *row_info, png_bytef *row, png_color_8 *bit_depth)
/* with low row dephts, could only be grayscale, so one channel */
if (row_info->bit_depth < 8)
{
png_bytef *bp;
png_bytep bp;
png_uint_32 i;
int j;
png_byte mask;
@@ -236,7 +236,7 @@ png_do_shift(png_row_info *row_info, png_bytef *row, png_color_8 *bit_depth)
}
else if (row_info->bit_depth == 8)
{
png_bytef *bp;
png_bytep bp;
png_uint_32 i;
int j;
@@ -262,7 +262,7 @@ png_do_shift(png_row_info *row_info, png_bytef *row, png_color_8 *bit_depth)
}
else
{
png_bytef *bp;
png_bytep bp;
png_uint_32 i;
int j;
@@ -297,7 +297,7 @@ png_do_shift(png_row_info *row_info, png_bytef *row, png_color_8 *bit_depth)
#ifdef PNG_WRITE_FILLER_SUPPORTED
/* remove filler byte */
void
png_do_write_filler(png_row_info *row_info, png_bytef *row,
png_do_write_filler(png_row_infop row_info, png_bytep row,
png_byte filler_loc)
{
if (row && row_info && row_info->color_type == PNG_COLOR_TYPE_RGB &&
@@ -305,7 +305,8 @@ png_do_write_filler(png_row_info *row_info, png_bytef *row,
{
if (filler_loc == PNG_FILLER_AFTER)
{
png_bytef *sp, *dp;
png_bytep sp, dp;
png_uint_32 i;
for (i = 1, sp = row + 4, dp = row + 3;
@@ -323,10 +324,10 @@ png_do_write_filler(png_row_info *row_info, png_bytef *row,
}
else
{
png_bytef *sp, *dp;
png_bytep sp, dp;
png_uint_32 i;
for (i = 1, sp = row + 4, dp = row + 3;
for (i = 0, sp = row, dp = row;
i < row_info->width;
i++)
{