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Imported from libpng-1.0.11beta3.tar

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This commit is contained in:
Glenn Randers-Pehrson
2001-04-14 20:15:41 -05:00
parent f64a06f5ec
commit e1eff58f87
53 changed files with 722 additions and 254 deletions
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64
pngwutil.c
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@@ -1,7 +1,7 @@
/* pngwutil.c - utilities to write a PNG file
*
* libpng 1.0.11beta2 - April 11, 2001
* libpng 1.0.11beta3 - April 15, 2001
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2001 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -235,21 +235,35 @@ png_text_compress(png_structp png_ptr,
old_ptr = comp->output_ptr;
comp->output_ptr = (png_charpp)png_malloc(png_ptr,
(png_uint_32)(comp->max_output_ptr * sizeof (png_charpp)));
png_memcpy(comp->output_ptr, old_ptr,
old_max * sizeof (png_charp));
if (comp->output_ptr == (png_charpp)NULL)
{
png_warning (png_ptr, "Cannot allocate compression buffer");
comp->output_ptr=old_ptr;
}
png_memcpy(comp->output_ptr, old_ptr, old_max
* sizeof (png_charp));
png_free(png_ptr, old_ptr);
}
else
comp->output_ptr = (png_charpp)png_malloc(png_ptr,
(png_uint_32)(comp->max_output_ptr * sizeof (png_charp)));
if (comp->output_ptr == (png_charpp)NULL)
{
png_warning (png_ptr, "Cannot allocate compression buffer");
}
}
/* save the data */
comp->output_ptr[comp->num_output_ptr] = (png_charp)png_malloc(png_ptr,
(png_uint_32)png_ptr->zbuf_size);
png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf,
png_ptr->zbuf_size);
comp->num_output_ptr++;
if (comp->output_ptr[comp->num_output_ptr] == (png_charp)NULL)
png_warning (png_ptr, "Cannot allocate compression buffer");
else
{
png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf,
png_ptr->zbuf_size);
comp->num_output_ptr++;
}
/* and reset the buffer */
png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
@@ -284,8 +298,9 @@ png_text_compress(png_structp png_ptr,
/* This could be optimized to realloc() */
comp->output_ptr = (png_charpp)png_malloc(png_ptr,
(png_uint_32)(comp->max_output_ptr * sizeof (png_charpp)));
png_memcpy(comp->output_ptr, old_ptr,
old_max * sizeof (png_charp));
if (comp->output_ptr != (png_charpp)NULL)
png_memcpy(comp->output_ptr, old_ptr,
old_max * sizeof (png_charp));
png_free(png_ptr, old_ptr);
}
else
@@ -296,9 +311,14 @@ png_text_compress(png_structp png_ptr,
/* save off the data */
comp->output_ptr[comp->num_output_ptr] =
(png_charp)png_malloc(png_ptr, (png_uint_32)png_ptr->zbuf_size);
png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf,
png_ptr->zbuf_size);
comp->num_output_ptr++;
if (comp->output_ptr[comp->num_output_ptr] == (png_charp)NULL)
png_warning (png_ptr, "Cannot allocate compression buffer");
else
{
png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf,
png_ptr->zbuf_size);
comp->num_output_ptr++;
}
/* and reset the buffer pointers */
png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
@@ -1109,6 +1129,12 @@ png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key)
png_debug1(2, "Keyword to be checked is '%s'\n", key);
*new_key = (png_charp)png_malloc(png_ptr, (png_uint_32)(key_len + 2));
if (*new_key == (png_charp)NULL)
{
png_warning(png_ptr, "Could not allocate new key; keyword not checked");
return key_len;
}
/* Replace non-printing characters with a blank and print a warning */
for (kp = key, dp = *new_key; *kp != '\0'; kp++, dp++)
@@ -1425,6 +1451,12 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0,
params_len = (png_uint_32p)png_malloc(png_ptr, (png_uint_32)(nparams
*sizeof(png_uint_32)));
if (params_len == (png_uint_32p)NULL)
{
png_warning (png_ptr, "Could not allocate params for pCAL");
return;
}
/* Find the length of each parameter, making sure we don't count the
null terminator for the last parameter. */
for (i = 0; i < nparams; i++)
@@ -1608,6 +1640,8 @@ png_write_start_row(png_structp png_ptr)
/* set up row buffer */
png_ptr->row_buf = (png_bytep)png_malloc(png_ptr, (png_uint_32)buf_size);
if (png_ptr->row_buf == (png_bytep)NULL)
png_error(png_ptr, "Could not allocate row buffer");
png_ptr->row_buf[0] = PNG_FILTER_VALUE_NONE;
/* set up filtering buffer, if using this filter */
@@ -1615,6 +1649,8 @@ png_write_start_row(png_structp png_ptr)
{
png_ptr->sub_row = (png_bytep)png_malloc(png_ptr,
(png_ptr->rowbytes + 1));
if (png_ptr->sub_row == (png_bytep)NULL)
png_error(png_ptr, "Could not allocate sub row buffer");
png_ptr->sub_row[0] = PNG_FILTER_VALUE_SUB;
}
@@ -1629,6 +1665,8 @@ png_write_start_row(png_structp png_ptr)
{
png_ptr->up_row = (png_bytep )png_malloc(png_ptr,
(png_ptr->rowbytes + 1));
if (png_ptr->up_row == (png_bytep)NULL)
png_error(png_ptr, "Could not allocate up row buffer");
png_ptr->up_row[0] = PNG_FILTER_VALUE_UP;
}
@@ -1636,6 +1674,8 @@ png_write_start_row(png_structp png_ptr)
{
png_ptr->avg_row = (png_bytep)png_malloc(png_ptr,
(png_ptr->rowbytes + 1));
if (png_ptr->avg_row == (png_bytep)NULL)
png_error(png_ptr, "Could not allocate avg row buffer");
png_ptr->avg_row[0] = PNG_FILTER_VALUE_AVG;
}
@@ -1643,6 +1683,8 @@ png_write_start_row(png_structp png_ptr)
{
png_ptr->paeth_row = (png_bytep )png_malloc(png_ptr,
(png_ptr->rowbytes + 1));
if (png_ptr->paeth_row == (png_bytep)NULL)
png_error(png_ptr, "Could not allocate paeth row buffer");
png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH;
}
}