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Imported from libpng-0.85.tar

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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
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40
pngtrans.c
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@@ -2,10 +2,10 @@
/* pngtrans.c - transforms the data in a row
routines used by both readers and 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
@@ -14,7 +14,7 @@
#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
/* turn on bgr to rgb mapping */
void
png_set_bgr(png_struct *png_ptr)
png_set_bgr(png_structp png_ptr)
{
png_ptr->transformations |= PNG_BGR;
}
@@ -23,7 +23,7 @@ png_set_bgr(png_struct *png_ptr)
#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
/* turn on 16 bit byte swapping */
void
png_set_swap(png_struct *png_ptr)
png_set_swap(png_structp png_ptr)
{
if (png_ptr->bit_depth == 16)
png_ptr->transformations |= PNG_SWAP_BYTES;
@@ -33,7 +33,7 @@ png_set_swap(png_struct *png_ptr)
#if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED)
/* turn on pixel packing */
void
png_set_packing(png_struct *png_ptr)
png_set_packing(png_structp png_ptr)
{
if (png_ptr->bit_depth < 8)
{
@@ -45,7 +45,7 @@ png_set_packing(png_struct *png_ptr)
#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
void
png_set_shift(png_struct *png_ptr, png_color_8 *true_bits)
png_set_shift(png_structp png_ptr, png_color_8p true_bits)
{
png_ptr->transformations |= PNG_SHIFT;
png_ptr->shift = *true_bits;
@@ -54,7 +54,7 @@ png_set_shift(png_struct *png_ptr, png_color_8 *true_bits)
#if defined(PNG_READ_INTERLACING_SUPPORTED) || defined(PNG_WRITE_INTERLACING_SUPPORTED)
int
png_set_interlace_handling(png_struct *png_ptr)
png_set_interlace_handling(png_structp png_ptr)
{
if (png_ptr->interlaced)
{
@@ -68,7 +68,7 @@ png_set_interlace_handling(png_struct *png_ptr)
#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
void
png_set_filler(png_struct *png_ptr, int filler, int filler_loc)
png_set_filler(png_structp png_ptr, int filler, int filler_loc)
{
png_ptr->transformations |= PNG_FILLER;
png_ptr->filler = (png_byte)filler;
@@ -80,13 +80,13 @@ png_set_filler(png_struct *png_ptr, int filler, int filler_loc)
/* old functions kept around for compatability purposes */
void
png_set_rgbx(png_struct *png_ptr)
png_set_rgbx(png_structp png_ptr)
{
png_set_filler(png_ptr, 0xff, PNG_FILLER_AFTER);
}
void
png_set_xrgb(png_struct *png_ptr)
png_set_xrgb(png_structp png_ptr)
{
png_set_filler(png_ptr, 0xff, PNG_FILLER_BEFORE);
}
@@ -94,19 +94,19 @@ png_set_xrgb(png_struct *png_ptr)
#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED)
void
png_set_invert_mono(png_struct *png_ptr)
png_set_invert_mono(png_structp png_ptr)
{
png_ptr->transformations |= PNG_INVERT_MONO;
}
/* invert monocrome grayscale data */
void
png_do_invert(png_row_info *row_info, png_bytef *row)
png_do_invert(png_row_infop row_info, png_bytep row)
{
if (row && row_info && row_info->bit_depth == 1 &&
row_info->color_type == PNG_COLOR_TYPE_GRAY)
{
png_bytef *rp;
png_bytep rp;
png_uint_32 i;
for (i = 0, rp = row;
@@ -122,11 +122,11 @@ png_do_invert(png_row_info *row_info, png_bytef *row)
#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
/* swaps byte order on 16 bit depth images */
void
png_do_swap(png_row_info *row_info, png_bytef *row)
png_do_swap(png_row_infop row_info, png_bytep row)
{
if (row && row_info && row_info->bit_depth == 16)
{
png_bytef *rp;
png_bytep rp;
png_byte t;
png_uint_32 i;
@@ -145,13 +145,13 @@ png_do_swap(png_row_info *row_info, png_bytef *row)
#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
/* swaps red and blue */
void
png_do_bgr(png_row_info *row_info, png_bytef *row)
png_do_bgr(png_row_infop row_info, png_bytep row)
{
if (row && row_info && (row_info->color_type & 2))
{
if (row_info->color_type == 2 && row_info->bit_depth == 8)
{
png_bytef *rp;
png_bytep rp;
png_byte t;
png_uint_32 i;
@@ -166,7 +166,7 @@ png_do_bgr(png_row_info *row_info, png_bytef *row)
}
else if (row_info->color_type == 6 && row_info->bit_depth == 8)
{
png_bytef *rp;
png_bytep rp;
png_byte t;
png_uint_32 i;
@@ -181,7 +181,7 @@ png_do_bgr(png_row_info *row_info, png_bytef *row)
}
else if (row_info->color_type == 2 && row_info->bit_depth == 16)
{
png_bytef *rp;
png_bytep rp;
png_byte t[2];
png_uint_32 i;
@@ -199,7 +199,7 @@ png_do_bgr(png_row_info *row_info, png_bytef *row)
}
else if (row_info->color_type == 6 && row_info->bit_depth == 16)
{
png_bytef *rp;
png_bytep rp;
png_byte t[2];
png_uint_32 i;