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[devel] Standardized the structure of some pngget.c functions.

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This commit is contained in:
Glenn Randers-Pehrson 2010-10-23 10:14:42 -05:00
parent 62333ba0cb
commit 5c5f593ffb
3 changed files with 62 additions and 100 deletions
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1
ANNOUNCE
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@ -434,6 +434,7 @@ Version 1.5.0beta53 [October 18, 2010]
Version 1.5.0beta54 [October 23, 2010]
Require 48 bytes, not 64 bytes, for big_row_buf in overflow checks.
Standardized the structure of some pngget.c functions.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net:
(subscription required; visit

1
CHANGES
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@ -3072,6 +3072,7 @@ Version 1.5.0beta53 [October 18, 2010]
Version 1.5.0beta54 [October 23, 2010]
Require 48 bytes, not 64 bytes, for big_row_buf in overflow checks.
Standardized the structure of some pngget.c functions.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

122
pngget.c
View File

@ -22,7 +22,6 @@ png_get_valid(png_structp png_ptr, png_infop info_ptr, png_uint_32 flag)
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->valid & flag);
else
return(0);
}
@ -32,7 +31,6 @@ png_get_rowbytes(png_structp png_ptr, png_infop info_ptr)
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->rowbytes);
else
return(0);
}
@ -43,7 +41,6 @@ png_get_rows(png_structp png_ptr, png_infop info_ptr)
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->row_pointers);
else
return(0);
}
#endif
@ -116,64 +113,51 @@ png_get_compression_type(png_structp png_ptr, png_infop info_ptr)
png_uint_32 PNGAPI
png_get_x_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#ifdef PNG_pHYs_SUPPORTED
if (info_ptr->valid & PNG_INFO_pHYs)
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
{
png_debug1(1, "in %s retrieval function", "png_get_x_pixels_per_meter");
png_debug1(1, "in %s retrieval function",
"png_get_x_pixels_per_meter");
if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
return (0);
else
if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER)
return (info_ptr->x_pixels_per_unit);
}
#else
return (0);
#endif
return (0);
}
png_uint_32 PNGAPI
png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#ifdef PNG_pHYs_SUPPORTED
if (info_ptr->valid & PNG_INFO_pHYs)
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
{
png_debug1(1, "in %s retrieval function", "png_get_y_pixels_per_meter");
png_debug1(1, "in %s retrieval function",
"png_get_y_pixels_per_meter");
if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
return (0);
else
if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER)
return (info_ptr->y_pixels_per_unit);
}
#else
return (0);
#endif
return (0);
}
png_uint_32 PNGAPI
png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#ifdef PNG_pHYs_SUPPORTED
if (info_ptr->valid & PNG_INFO_pHYs)
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
{
png_debug1(1, "in %s retrieval function", "png_get_pixels_per_meter");
if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER ||
info_ptr->x_pixels_per_unit != info_ptr->y_pixels_per_unit)
return (0);
else
if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER &&
info_ptr->x_pixels_per_unit == info_ptr->y_pixels_per_unit)
return (info_ptr->x_pixels_per_unit);
}
#else
return (0);
#endif
return (0);
}
@ -181,23 +165,17 @@ png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
float PNGAPI
png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#ifdef PNG_READ_pHYs_SUPPORTED
if (info_ptr->valid & PNG_INFO_pHYs)
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
{
png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio");
if (info_ptr->x_pixels_per_unit == 0)
return ((float)0.0);
else
if (info_ptr->x_pixels_per_unit != 0)
return ((float)((float)info_ptr->y_pixels_per_unit
/(float)info_ptr->x_pixels_per_unit));
}
#else
return (0.0);
#endif
return ((float)0.0);
}
#endif
@ -224,6 +202,7 @@ png_get_pixel_aspect_ratio_fixed(png_structp png_ptr, png_infop info_ptr)
return res;
}
#endif
return 0;
}
#endif
@ -231,88 +210,64 @@ png_get_pixel_aspect_ratio_fixed(png_structp png_ptr, png_infop info_ptr)
png_int_32 PNGAPI
png_get_x_offset_microns(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#ifdef PNG_oFFs_SUPPORTED
if (info_ptr->valid & PNG_INFO_oFFs)
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
{
png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns");
if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
return (0);
else
if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER)
return (info_ptr->x_offset);
}
#else
return (0);
#endif
return (0);
}
png_int_32 PNGAPI
png_get_y_offset_microns(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#ifdef PNG_oFFs_SUPPORTED
if (info_ptr->valid & PNG_INFO_oFFs)
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
{
png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns");
if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
return (0);
else
if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER)
return (info_ptr->y_offset);
}
#else
return (0);
#endif
return (0);
}
png_int_32 PNGAPI
png_get_x_offset_pixels(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#ifdef PNG_oFFs_SUPPORTED
if (info_ptr->valid & PNG_INFO_oFFs)
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
{
png_debug1(1, "in %s retrieval function", "png_get_x_offset_pixels");
if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
return (0);
else
if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL)
return (info_ptr->x_offset);
}
#else
return (0);
#endif
return (0);
}
png_int_32 PNGAPI
png_get_y_offset_pixels(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#ifdef PNG_oFFs_SUPPORTED
if (info_ptr->valid & PNG_INFO_oFFs)
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
{
png_debug1(1, "in %s retrieval function", "png_get_y_offset_pixels");
if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
return (0);
else
if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL)
return (info_ptr->y_offset);
}
#else
return (0);
#endif
return (0);
}
@ -372,7 +327,7 @@ static png_fixed_point
png_fixed_inches_from_microns(png_structp png_ptr, png_int_32 microns)
{
/* Convert from metres * 1,000,000 to inches * 100,000, meters to
* inches is simply *(100/2.54), so we want *(10/2.54) == 1000/254.
* inches is simply *(100/2.54), so we want *(10/2.54) == 500/127.
* Notice that this can overflow - a warning is output and 0 is
* returned.
*/
@ -453,6 +408,7 @@ png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr,
}
}
}
return (retval);
}
#endif /* PNG_pHYs_SUPPORTED */
@ -468,7 +424,6 @@ png_get_channels(png_structp png_ptr, png_infop info_ptr)
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->channels);
else
return (0);
}
@ -478,7 +433,6 @@ png_get_signature(png_structp png_ptr, png_infop info_ptr)
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->signature);
else
return (NULL);
}
@ -495,6 +449,7 @@ png_get_bKGD(png_structp png_ptr, png_infop info_ptr,
*background = &(info_ptr->background);
return (PNG_INFO_bKGD);
}
return (0);
}
#endif
@ -528,6 +483,7 @@ png_get_cHRM(png_structp png_ptr, png_infop info_ptr,
*blue_y = png_float(png_ptr, info_ptr->y_blue, "cHRM blue Y");
return (PNG_INFO_cHRM);
}
return (0);
}
# endif
@ -561,6 +517,7 @@ png_get_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
*blue_y = info_ptr->y_blue;
return (PNG_INFO_cHRM);
}
return (0);
}
# endif
@ -588,10 +545,13 @@ png_get_gAMA(png_structp png_ptr, png_infop info_ptr, double *file_gamma)
{
png_fixed_point igamma;
png_uint_32 ok = png_get_gAMA_fixed(png_ptr, info_ptr, &igamma);
if (ok)
*file_gamma = png_float(png_ptr, igamma, "png_get_gAMA");
return ok;
}
# endif
#endif
@ -792,7 +752,7 @@ png_get_sCAL(png_structp png_ptr, png_infop info_ptr,
return(0);
}
#endif
# endif /* FLOATING POINT */
png_uint_32 PNGAPI
png_get_sCAL_s(png_structp png_ptr, png_infop info_ptr,
int *unit, png_charpp width, png_charpp height)
@ -808,7 +768,7 @@ png_get_sCAL_s(png_structp png_ptr, png_infop info_ptr,
return(0);
}
#endif
#endif /* sCAL */
#ifdef PNG_pHYs_SUPPORTED
png_uint_32 PNGAPI
@ -843,7 +803,7 @@ png_get_pHYs(png_structp png_ptr, png_infop info_ptr,
return (retval);
}
#endif
#endif /* pHYs */
png_uint_32 PNGAPI
png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette,