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Imported from libpng-1.4.0beta61.tar

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This commit is contained in:
Glenn Randers-Pehrson
2009-05-20 12:45:29 -05:00
parent b205f291f6
commit 4bb4d01681
32 changed files with 370 additions and 346 deletions
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56
pngwutil.c
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@@ -1,7 +1,7 @@
/* pngwutil.c - utilities to write a PNG file
*
* Last changed in libpng 1.4.0 [May 18, 2009]
* Last changed in libpng 1.4.0 [May 20, 2009]
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -63,7 +63,7 @@ png_write_sig(png_structp png_ptr)
png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10};
#ifdef PNG_IO_STATE_SUPPORTED
/* inform the I/O callback that the signature is being written */
/* Inform the I/O callback that the signature is being written */
png_ptr->io_state = PNG_IO_WRITING | PNG_IO_SIGNATURE;
#endif
@@ -185,14 +185,14 @@ png_write_chunk_end(png_structp png_ptr)
typedef struct
{
char *input; /* the uncompressed input data */
int input_len; /* its length */
int num_output_ptr; /* number of output pointers used */
int max_output_ptr; /* size of output_ptr */
png_charpp output_ptr; /* array of pointers to output */
char *input; /* The uncompressed input data */
int input_len; /* Its length */
int num_output_ptr; /* Number of output pointers used */
int max_output_ptr; /* Size of output_ptr */
png_charpp output_ptr; /* Array of pointers to output */
} compression_state;
/* compress given text into storage in the png_ptr structure */
/* Compress given text into storage in the png_ptr structure */
static int /* PRIVATE */
png_text_compress(png_structp png_ptr,
png_charp text, png_size_t text_len, int compression,
@@ -249,11 +249,11 @@ png_text_compress(png_structp png_ptr,
/* This is the same compression loop as in png_write_row() */
do
{
/* compress the data */
/* Compress the data */
ret = deflate(&png_ptr->zstream, Z_NO_FLUSH);
if (ret != Z_OK)
{
/* error */
/* Error */
if (png_ptr->zstream.msg != NULL)
png_error(png_ptr, png_ptr->zstream.msg);
else
@@ -370,7 +370,7 @@ png_text_compress(png_structp png_ptr,
return((int)text_len);
}
/* ship the compressed text out via chunk writes */
/* Ship the compressed text out via chunk writes */
static void /* PRIVATE */
png_write_compressed_data_out(png_structp png_ptr, compression_state *comp)
{
@@ -418,7 +418,7 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
#endif
int ret;
png_byte buf[13]; /* buffer to store the IHDR info */
png_byte buf[13]; /* Buffer to store the IHDR info */
png_debug(1, "in png_write_IHDR");
/* Check that we have valid input data from the application info */
@@ -517,7 +517,7 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
png_ptr->pixel_depth = (png_byte)(bit_depth * png_ptr->channels);
png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, width);
/* set the usr info, so any transformations can modify it */
/* Set the usr info, so any transformations can modify it */
png_ptr->usr_width = png_ptr->width;
png_ptr->usr_bit_depth = png_ptr->bit_depth;
png_ptr->usr_channels = png_ptr->channels;
@@ -577,7 +577,7 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
png_ptr->zstream.next_out = png_ptr->zbuf;
png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
/* libpng is not interested in zstream.data_type */
/* set it to a predefined value, to avoid its evaluation inside zlib */
/* Set it to a predefined value, to avoid its evaluation inside zlib */
png_ptr->zstream.data_type = Z_BINARY;
png_ptr->mode = PNG_HAVE_IHDR;
@@ -830,7 +830,7 @@ png_write_iCCP(png_structp png_ptr, png_charp name, int compression_type,
profile_len = png_text_compress(png_ptr, profile,
(png_size_t)profile_len, PNG_COMPRESSION_TYPE_BASE, &comp);
/* make sure we include the NULL after the name and the compression type */
/* Make sure we include the NULL after the name and the compression type */
png_write_chunk_start(png_ptr, (png_bytep)png_iCCP,
(png_uint_32)(name_len + profile_len + 2));
new_name[name_len + 1] = 0x00;
@@ -926,7 +926,7 @@ png_write_sPLT(png_structp png_ptr, png_sPLT_tp spalette)
#endif
#if defined(PNG_WRITE_sBIT_SUPPORTED)
/* write the sBIT chunk */
/* Write the sBIT chunk */
void /* PRIVATE */
png_write_sBIT(png_structp png_ptr, png_color_8p sbit, int color_type)
{
@@ -982,7 +982,7 @@ png_write_sBIT(png_structp png_ptr, png_color_8p sbit, int color_type)
#endif
#if defined(PNG_WRITE_cHRM_SUPPORTED)
/* write the cHRM chunk */
/* Write the cHRM chunk */
#ifdef PNG_FLOATING_POINT_SUPPORTED
void /* PRIVATE */
png_write_cHRM(png_structp png_ptr, double white_x, double white_y,
@@ -1013,7 +1013,7 @@ png_write_cHRM(png_structp png_ptr, double white_x, double white_y,
int_red_x, int_red_y, int_green_x, int_green_y, int_blue_x, int_blue_y))
#endif
{
/* each value is saved in 1/100,000ths */
/* Each value is saved in 1/100,000ths */
png_save_uint_32(buf, int_white_x);
png_save_uint_32(buf + 4, int_white_y);
@@ -1044,7 +1044,7 @@ png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x,
png_byte buf[32];
png_debug(1, "in png_write_cHRM");
/* each value is saved in 1/100,000ths */
/* Each value is saved in 1/100,000ths */
#if !defined(PNG_NO_CHECK_cHRM)
if (png_check_cHRM_fixed(png_ptr, white_x, white_y, red_x, red_y,
green_x, green_y, blue_x, blue_y))
@@ -1087,13 +1087,13 @@ png_write_tRNS(png_structp png_ptr, png_bytep trans, png_color_16p tran,
png_warning(png_ptr, "Invalid number of transparent colors specified");
return;
}
/* write the chunk out as it is */
/* Write the chunk out as it is */
png_write_chunk(png_ptr, (png_bytep)png_tRNS, trans,
(png_size_t)num_trans);
}
else if (color_type == PNG_COLOR_TYPE_GRAY)
{
/* one 16 bit value */
/* One 16 bit value */
if (tran->gray >= (1 << png_ptr->bit_depth))
{
png_warning(png_ptr,
@@ -1105,7 +1105,7 @@ png_write_tRNS(png_structp png_ptr, png_bytep trans, png_color_16p tran,
}
else if (color_type == PNG_COLOR_TYPE_RGB)
{
/* three 16 bit values */
/* Three 16 bit values */
png_save_uint_16(buf, tran->red);
png_save_uint_16(buf + 2, tran->green);
png_save_uint_16(buf + 4, tran->blue);
@@ -1359,7 +1359,7 @@ png_write_tEXt(png_structp png_ptr, png_charp key, png_charp text,
else
text_len = png_strlen(text);
/* make sure we include the 0 after the key */
/* Make sure we include the 0 after the key */
png_write_chunk_start(png_ptr, (png_bytep)png_tEXt,
(png_uint_32)(key_len + text_len + 1));
/*
@@ -1658,8 +1658,8 @@ png_write_sCAL_s(png_structp png_ptr, int unit, png_charp width,
}
buf[0] = (png_byte)unit;
png_memcpy(buf + 1, width, wlen + 1); /* append the '\0' here */
png_memcpy(buf + wlen + 2, height, hlen); /* do NOT append the '\0' here */
png_memcpy(buf + 1, width, wlen + 1); /* Append the '\0' here */
png_memcpy(buf + wlen + 2, height, hlen); /* Do NOT append the '\0' here */
png_debug1(3, "sCAL total length = %u", (unsigned int)total_len);
png_write_chunk(png_ptr, (png_bytep)png_sCAL, buf, total_len);
@@ -1769,7 +1769,7 @@ png_write_start_row(png_structp png_ptr)
/* We only need to keep the previous row if we are using one of these. */
if (png_ptr->do_filter & (PNG_FILTER_AVG | PNG_FILTER_UP | PNG_FILTER_PAETH))
{
/* set up previous row buffer */
/* Set up previous row buffer */
#ifdef PNG_CALLOC_SUPPORTED
png_ptr->prev_row = (png_bytep)png_calloc(png_ptr,
(png_alloc_size_t)buf_size);
@@ -1854,7 +1854,7 @@ png_write_finish_row(png_structp png_ptr)
int ret;
png_debug(1, "in png_write_finish_row");
/* next row */
/* Next row */
png_ptr->row_number++;
/* See if we are done */
@@ -2130,7 +2130,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
#endif
png_debug(1, "in png_write_find_filter");
/* find out how many bytes offset each pixel is */
/* Find out how many bytes offset each pixel is */
bpp = (row_info->pixel_depth + 7) >> 3;
prev_row = png_ptr->prev_row;