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Imported from libpng-0.99i.tar

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This commit is contained in:
Glenn Randers-Pehrson
1998-03-07 06:06:55 -06:00
parent cbe52d8720
commit 08a3343e05
48 changed files with 1232 additions and 174 deletions
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33
pngrtran.c
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@@ -1,12 +1,12 @@
/* pngrtran.c - transforms the data in a row for PNG readers
*
* libpng 0.99e
* libpng 1.00
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, Glenn Randers-Pehrson
* February 28, 1998
* March 7, 1998
*
* This file contains functions optionally called by an application
* in order to tell libpng how to handle data when reading a PNG.
@@ -600,6 +600,17 @@ png_set_rgb_to_gray(png_structp png_ptr, int gray_bits)
}
#endif
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
void
png_set_read_user_transform_fn(png_structp png_ptr, png_user_transform_ptr
read_user_transform_fn)
{
png_debug(1, "in png_set_read_user_transform_fn\n");
png_ptr->transformations |= PNG_USER_TRANSFORM;
png_ptr->read_user_transform_fn = read_user_transform_fn;
}
#endif
/* Initialize everything needed for the read. This includes modifying
* the palette.
*/
@@ -1078,7 +1089,7 @@ png_do_read_transformations(png_structp png_ptr)
png_ptr->gamma_shift);
#endif
#if defined(PNG_RGB_TO_GRAY_SUPPORTED)
#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
if (png_ptr->transformations & PNG_RGB_TO_GRAY)
png_do_rgb_to_gray(&(png_ptr->row_info), png_ptr->row_buf + 1);
#endif
@@ -1149,6 +1160,22 @@ png_do_read_transformations(png_structp png_ptr)
if (png_ptr->transformations & PNG_SWAP_BYTES)
png_do_swap(&(png_ptr->row_info), png_ptr->row_buf + 1);
#endif
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
if (png_ptr->transformations & PNG_USER_TRANSFORM)
if(png_ptr->read_user_transform_fn != NULL)
(*(png_ptr->read_user_transform_fn)) /* user read transform function */
(png_ptr, /* png_ptr */
&(png_ptr->row_info), /* row_info: */
/* png_uint_32 width; width of row */
/* png_uint_32 rowbytes; number of bytes in row */
/* png_byte color_type; color type of pixels */
/* png_byte bit_depth; bit depth of samples */
/* png_byte channels; number of channels (1-4) */
/* png_byte pixel_depth; bits per pixel (depth*channels) */
png_ptr->row_buf + 1); /* start of pixel data for row */
#endif
}
#if defined(PNG_READ_PACK_SUPPORTED)