mewin/libpng
1
0
Fork 0
mirror of https://git.code.sf.net/p/libpng/code.git synced 2025-07-10 18:04:09 +02:00
Code Issues Projects Releases Wiki Activity

[libpng16] Added "& 0xff" to things being typecast to "png_byte".

Browse Source
This commit is contained in:
Glenn Randers-Pehrson
2015-02-27 18:53:44 -06:00
parent 9a3de48b48
commit 7011a8cec3
12 changed files with 249 additions and 231 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
pngrutil.c
View File

@@ -822,13 +822,13 @@ png_handle_IHDR(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
/* Set internal variables */
png_ptr->width = width;
png_ptr->height = height;
png_ptr->bit_depth = (png_byte)bit_depth;
png_ptr->interlaced = (png_byte)interlace_type;
png_ptr->color_type = (png_byte)color_type;
png_ptr->bit_depth = (png_byte)(bit_depth & 0xff);
png_ptr->interlaced = (png_byte)(interlace_type & 0xff);
png_ptr->color_type = (png_byte)(color_type & 0xff);
#ifdef PNG_MNG_FEATURES_SUPPORTED
png_ptr->filter_type = (png_byte)filter_type;
png_ptr->filter_type = (png_byte)(filter_type & 0xff);
#endif
png_ptr->compression_type = (png_byte)compression_type;
png_ptr->compression_type = (png_byte)(compression_type & 0xff);
/* Find number of channels */
switch (png_ptr->color_type)
@@ -853,7 +853,8 @@ png_handle_IHDR(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
}
/* Set up other useful info */
png_ptr->pixel_depth = (png_byte)(png_ptr->bit_depth * png_ptr->channels);
png_ptr->pixel_depth =
(png_byte)(0xff & (png_ptr->bit_depth * png_ptr->channels));
png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, png_ptr->width);
png_debug1(3, "bit_depth = %d", png_ptr->bit_depth);
png_debug1(3, "channels = %d", png_ptr->channels);
@@ -2731,7 +2732,8 @@ png_cache_unknown_chunk(png_structrp png_ptr, png_uint_32 length)
/* The following is safe because of the PNG_SIZE_MAX init above */
png_ptr->unknown_chunk.size = (png_size_t)length/*SAFE*/;
/* 'mode' is a flag array, only the bottom four bits matter here */
png_ptr->unknown_chunk.location = (png_byte)png_ptr->mode/*SAFE*/;
png_ptr->unknown_chunk.location =
(png_byte)(0xff & png_ptr->mode/*SAFE*/);
if (length == 0)
png_ptr->unknown_chunk.data = NULL;
@@ -3228,7 +3230,7 @@ png_combine_row(png_const_structrp png_ptr, png_bytep dp, int display)
if (m != 0) /* something to copy */
{
if (m != 0xff)
*dp = (png_byte)((*dp & ~m) | (*sp & m));
*dp = (png_byte)(((*dp & ~m) | (*sp & m)) & 0xff);
else
*dp = *sp;
}
@@ -3480,7 +3482,8 @@ png_combine_row(png_const_structrp png_ptr, png_bytep dp, int display)
/* Restore the overwritten bits from the last byte if necessary. */
if (end_ptr != NULL)
*end_ptr = (png_byte)((end_byte & end_mask) | (*end_ptr & ~end_mask));
*end_ptr =
(png_byte)(0xff & ((end_byte & end_mask) | (*end_ptr & ~end_mask)));
}
#ifdef PNG_READ_INTERLACING_SUPPORTED
@@ -3774,16 +3777,14 @@ png_read_filter_row_avg(png_row_infop row_info, png_bytep row,
for (i = 0; i < bpp; i++)
{
*rp = (png_byte)(((int)(*rp) +
((int)(*pp++) / 2 )) & 0xff);
*rp = (png_byte)(((int)(*rp) + ((int)(*pp++) / 2 )) & 0xff);
rp++;
}
for (i = 0; i < istop; i++)
{
*rp = (png_byte)(((int)(*rp) +
(int)(*pp++ + *(rp-bpp)) / 2 ) & 0xff);
*rp = (png_byte)(((int)(*rp) + (int)(*pp++ + *(rp-bpp)) / 2 ) & 0xff);
rp++;
}
@@ -3799,7 +3800,7 @@ png_read_filter_row_paeth_1byte_pixel(png_row_infop row_info, png_bytep row,
/* First pixel/byte */
c = *prev_row++;
a = *row + c;
*row++ = (png_byte)a;
*row++ = (png_byte)(a & 0xff);
/* Remainder */
while (row < rp_end)
@@ -3833,7 +3834,7 @@ png_read_filter_row_paeth_1byte_pixel(png_row_infop row_info, png_bytep row,
*/
c = b;
a += *row;
*row++ = (png_byte)a;
*row++ = (png_byte)(a & 0xff);
}
}
@@ -3850,7 +3851,7 @@ png_read_filter_row_paeth_multibyte_pixel(png_row_infop row_info, png_bytep row,
while (row < rp_end)
{
int a = *row + *prev_row++;
*row++ = (png_byte)(a&0xFF);
*row++ = (png_byte)(a & 0xff);
}
/* Remainder */
@@ -3881,7 +3882,7 @@ png_read_filter_row_paeth_multibyte_pixel(png_row_infop row_info, png_bytep row,
if (pc < pa) a = c;
a += *row;
*row++ = (png_byte)(a&0xFF);
*row++ = (png_byte)(a & 0xff);
}
}
@@ -4374,7 +4375,7 @@ defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
/* This value is stored in png_struct and double checked in the row read
* code.
*/
png_ptr->maximum_pixel_depth = (png_byte)max_pixel_depth;
png_ptr->maximum_pixel_depth = (png_byte)(max_pixel_depth & 0xff);
png_ptr->transformed_pixel_depth = 0; /* calculated on demand */
/* Align the width on the next larger 8 pixels. Mainly used