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Imported from libpng-1.0.2a.tar

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This commit is contained in:
Glenn Randers-Pehrson
1998-12-29 11:47:59 -06:00
parent 345bc27e70
commit 5c6aeb25c1
45 changed files with 1160 additions and 735 deletions
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28
pngpread.c
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@@ -1,7 +1,7 @@
/* pngpread.c - read a png file in push mode
*
* libpng 1.0.2 - June 14, 1998
* libpng 1.0.2a - December 29, 1998
* 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
@@ -92,7 +92,7 @@ png_push_read_sig(png_structp png_ptr, png_infop info_ptr)
num_to_check = png_ptr->buffer_size;
}
png_push_fill_buffer(png_ptr, &(info_ptr->signature[num_checked]),
png_push_fill_buffer(png_ptr, &(info_ptr->signature[num_checked]),
num_to_check);
png_ptr->sig_bytes += num_to_check;
@@ -466,7 +466,7 @@ png_push_save_buffer(png_structp png_ptr)
new_max = png_ptr->save_buffer_size + png_ptr->current_buffer_size + 256;
old_buffer = png_ptr->save_buffer;
png_ptr->save_buffer = (png_bytep)png_malloc(png_ptr,
png_ptr->save_buffer = (png_bytep)png_malloc(png_ptr,
(png_uint_32)new_max);
png_memcpy(png_ptr->save_buffer, old_buffer, png_ptr->save_buffer_size);
png_free(png_ptr, old_buffer);
@@ -630,7 +630,7 @@ png_push_process_row(png_structp png_ptr)
png_ptr->row_info.channels = png_ptr->channels;
png_ptr->row_info.bit_depth = png_ptr->bit_depth;
png_ptr->row_info.pixel_depth = png_ptr->pixel_depth;
png_ptr->row_info.rowbytes = ((png_ptr->row_info.width *
(png_uint_32)png_ptr->row_info.pixel_depth + 7) >> 3);
@@ -781,6 +781,7 @@ png_read_push_finish_row(png_structp png_ptr)
png_ptr->pass++;
if (png_ptr->pass >= 7)
break;
png_ptr->iwidth = (png_ptr->width +
png_pass_inc[png_ptr->pass] - 1 -
png_pass_start[png_ptr->pass]) /
@@ -789,18 +790,15 @@ png_read_push_finish_row(png_structp png_ptr)
png_ptr->irowbytes = ((png_ptr->iwidth *
png_ptr->pixel_depth + 7) >> 3) + 1;
if (!(png_ptr->transformations & PNG_INTERLACE))
{
png_ptr->num_rows = (png_ptr->height +
png_pass_yinc[png_ptr->pass] - 1 -
png_pass_ystart[png_ptr->pass]) /
png_pass_yinc[png_ptr->pass];
if (!(png_ptr->num_rows))
continue;
}
if (png_ptr->transformations & PNG_INTERLACE)
break;
} while (png_ptr->iwidth == 0);
png_ptr->num_rows = (png_ptr->height +
png_pass_yinc[png_ptr->pass] - 1 -
png_pass_ystart[png_ptr->pass]) /
png_pass_yinc[png_ptr->pass];
} while (png_ptr->iwidth == 0 || png_ptr->num_rows == 0);
}
}
@@ -826,7 +824,7 @@ png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length
}
#endif
png_ptr->current_text = (png_charp)png_malloc(png_ptr,
png_ptr->current_text = (png_charp)png_malloc(png_ptr,
(png_uint_32)(length+1));
png_ptr->current_text[length] = '\0';
png_ptr->current_text_ptr = png_ptr->current_text;