png.c File Reference

#include "pngpriv.h"

Include dependency graph for png.c:

Go to the source code of this file.

Macros
#define	APPEND_STRING(string)   pos = png_safecat(out, 29, pos, (string))
#define	APPEND_NUMBER(format, value)   APPEND_STRING(PNG_FORMAT_NUMBER(number_buf, format, (value)))
#define	APPEND(ch)   if (pos < 28) out[pos++] = (ch)
#define	PNG_MD5(a, b, c, d)   { a, b, c, d }, (a!=0)||(b!=0)||(c!=0)||(d!=0)
#define	PNG_ICC_CHECKSUM(adler, crc, md5, intent, broke, date, length, fname)   { adler, crc, length, md5, broke, intent },
#define	png_gt(a, b)   ((a) > (b))
#define	png_fp_add(state, flags)   ((state) |= (flags))
#define	png_fp_set(state, value)   ((state) = (value) | ((state) & PNG_FP_STICKY))

Typedefs
typedef png_libpng_version_1_6_16	Your_png_h_is_not_version_1_6_16

Functions
void	png_set_sig_bytes (png_structrp png_ptr, int num_bytes)
int	png_sig_cmp (png_const_bytep sig, png_size_t start, png_size_t num_to_check)
voidpf	png_zalloc (voidpf png_ptr, uInt items, uInt size)
void	png_zfree (voidpf png_ptr, voidpf ptr)
void	png_reset_crc (png_structrp png_ptr)
void	png_calculate_crc (png_structrp png_ptr, png_const_bytep ptr, png_size_t length)
int	png_user_version_check (png_structrp png_ptr, png_const_charp user_png_ver)
png_structp	png_create_png_struct (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn)
png_infop	png_create_info_struct (png_const_structrp png_ptr)
void	png_destroy_info_struct (png_const_structrp png_ptr, png_infopp info_ptr_ptr)
void	png_info_init_3 (png_infopp ptr_ptr, png_size_t png_info_struct_size)
void	png_data_freer (png_const_structrp png_ptr, png_inforp info_ptr, int freer, png_uint_32 mask)
void	png_free_data (png_const_structrp png_ptr, png_inforp info_ptr, png_uint_32 mask, int num)
png_voidp	png_get_io_ptr (png_const_structrp png_ptr)
void	png_init_io (png_structrp png_ptr, png_FILE_p fp)
void	png_save_int_32 (png_bytep buf, png_int_32 i)
int	png_convert_to_rfc1123_buffer (char out[29], png_const_timep ptime)
png_const_charp	png_convert_to_rfc1123 (png_structrp png_ptr, png_const_timep ptime)
png_const_charp	png_get_copyright (png_const_structrp png_ptr)
png_const_charp	png_get_libpng_ver (png_const_structrp png_ptr)
png_const_charp	png_get_header_ver (png_const_structrp png_ptr)
png_const_charp	png_get_header_version (png_const_structrp png_ptr)
void	png_build_grayscale_palette (int bit_depth, png_colorp palette)
int	png_handle_as_unknown (png_const_structrp png_ptr, png_const_bytep chunk_name)
int	png_chunk_unknown_handling (png_const_structrp png_ptr, png_uint_32 chunk_name)
int	png_reset_zstream (png_structrp png_ptr)
png_uint_32	png_access_version_number (void)
void	png_zstream_error (png_structrp png_ptr, int ret)
static int	png_colorspace_check_gamma (png_const_structrp png_ptr, png_colorspacerp colorspace, png_fixed_point gAMA, int from)
void	png_colorspace_set_gamma (png_const_structrp png_ptr, png_colorspacerp colorspace, png_fixed_point gAMA)
void	png_colorspace_sync_info (png_const_structrp png_ptr, png_inforp info_ptr)
void	png_colorspace_sync (png_const_structrp png_ptr, png_inforp info_ptr)
static int	png_xy_from_XYZ (png_xy *xy, const png_XYZ *XYZ)
static int	png_XYZ_from_xy (png_XYZ *XYZ, const png_xy *xy)
static int	png_XYZ_normalize (png_XYZ *XYZ)
static int	png_colorspace_endpoints_match (const png_xy *xy1, const png_xy *xy2, int delta)
static int	png_colorspace_check_xy (png_XYZ *XYZ, const png_xy *xy)
static int	png_colorspace_check_XYZ (png_xy *xy, png_XYZ *XYZ)
static int	png_colorspace_set_xy_and_XYZ (png_const_structrp png_ptr, png_colorspacerp colorspace, const png_xy *xy, const png_XYZ *XYZ, int preferred)
int	png_colorspace_set_chromaticities (png_const_structrp png_ptr, png_colorspacerp colorspace, const png_xy *xy, int preferred)
int	png_colorspace_set_endpoints (png_const_structrp png_ptr, png_colorspacerp colorspace, const png_XYZ *XYZ_in, int preferred)
static char	png_icc_tag_char (png_uint_32 byte)
static void	png_icc_tag_name (char *name, png_uint_32 tag)
static int	is_ICC_signature_char (png_alloc_size_t it)
static int	is_ICC_signature (png_alloc_size_t it)
static int	png_icc_profile_error (png_const_structrp png_ptr, png_colorspacerp colorspace, png_const_charp name, png_alloc_size_t value, png_const_charp reason)
int	png_colorspace_set_sRGB (png_const_structrp png_ptr, png_colorspacerp colorspace, int intent)
int	png_icc_check_length (png_const_structrp png_ptr, png_colorspacerp colorspace, png_const_charp name, png_uint_32 profile_length)
int	png_icc_check_header (png_const_structrp png_ptr, png_colorspacerp colorspace, png_const_charp name, png_uint_32 profile_length, png_const_bytep profile, int color_type)
int	png_icc_check_tag_table (png_const_structrp png_ptr, png_colorspacerp colorspace, png_const_charp name, png_uint_32 profile_length, png_const_bytep profile)
static int	png_compare_ICC_profile_with_sRGB (png_const_structrp png_ptr, png_const_bytep profile, uLong adler)
void	png_icc_set_sRGB (png_const_structrp png_ptr, png_colorspacerp colorspace, png_const_bytep profile, uLong adler)
int	png_colorspace_set_ICC (png_const_structrp png_ptr, png_colorspacerp colorspace, png_const_charp name, png_uint_32 profile_length, png_const_bytep profile, int color_type)
void	png_colorspace_set_rgb_coefficients (png_structrp png_ptr)
void	png_check_IHDR (png_const_structrp png_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, int interlace_type, int compression_type, int filter_type)
int	png_check_fp_number (png_const_charp string, png_size_t size, int *statep, png_size_tp whereami)
int	png_check_fp_string (png_const_charp string, png_size_t size)
static double	png_pow10 (int power)
void	png_ascii_from_fp (png_const_structrp png_ptr, png_charp ascii, png_size_t size, double fp, unsigned int precision)
void	png_ascii_from_fixed (png_const_structrp png_ptr, png_charp ascii, png_size_t size, png_fixed_point fp)
png_fixed_point	png_fixed (png_const_structrp png_ptr, double fp, png_const_charp text)
int	png_muldiv (png_fixed_point_p res, png_fixed_point a, png_int_32 times, png_int_32 divisor)
png_fixed_point	png_muldiv_warn (png_const_structrp png_ptr, png_fixed_point a, png_int_32 times, png_int_32 divisor)
png_fixed_point	png_reciprocal (png_fixed_point a)
int	png_gamma_significant (png_fixed_point gamma_val)
static png_fixed_point	png_product2 (png_fixed_point a, png_fixed_point b)
png_fixed_point	png_reciprocal2 (png_fixed_point a, png_fixed_point b)
png_byte	png_gamma_8bit_correct (unsigned int value, png_fixed_point gamma_val)
png_uint_16	png_gamma_16bit_correct (unsigned int value, png_fixed_point gamma_val)
png_uint_16	png_gamma_correct (png_structrp png_ptr, unsigned int value, png_fixed_point gamma_val)
static void	png_build_16bit_table (png_structrp png_ptr, png_uint_16pp *ptable, const unsigned int shift, const png_fixed_point gamma_val)
static void	png_build_16to8_table (png_structrp png_ptr, png_uint_16pp *ptable, const unsigned int shift, const png_fixed_point gamma_val)
static void	png_build_8bit_table (png_structrp png_ptr, png_bytepp ptable, const png_fixed_point gamma_val)
void	png_destroy_gamma_table (png_structrp png_ptr)
void	png_build_gamma_table (png_structrp png_ptr, int bit_depth)
int	png_set_option (png_structrp png_ptr, int option, int onoff)
static int	png_image_free_function (png_voidp argument)
void	png_image_free (png_imagep image)
int	png_image_error (png_imagep image, png_const_charp error_message)

Variables
static const png_xy	sRGB_xy
static const png_byte	D50_nCIEXYZ [12]
struct {
png_uint_32   adler
png_uint_32   crc
png_uint_32   length
png_uint_32   md5 [4]
png_byte   have_md5
png_byte   is_broken
png_uint_16   intent
}	png_sRGB_checks []
const png_uint_16	png_sRGB_table [256]
const png_uint_16	png_sRGB_base [512]
const png_byte	png_sRGB_delta [512]

Macro Definition Documentation

APPEND

#define APPEND

(

ch

)

if (pos < 28) out[pos++] = (ch)

APPEND_NUMBER

#define APPEND_NUMBER	(		format,
			value
	)		APPEND_STRING(PNG_FORMAT_NUMBER(number_buf, format, (value)))

APPEND_STRING

#define APPEND_STRING

(

string

)

pos = png_safecat(out, 29, pos, (string))

png_fp_add

#define png_fp_add	(		state,
			flags
	)		((state) |= (flags))

Definition at line 2639 of file png.c.

png_fp_set

#define png_fp_set	(		state,
			value
	)		((state) = (value) | ((state) & PNG_FP_STICKY))

Definition at line 2640 of file png.c.

png_gt

#define png_gt	(		a,
			b
	)		((a) > (b))

Definition at line 2472 of file png.c.

PNG_ICC_CHECKSUM

#define PNG_ICC_CHECKSUM	(		adler,
			crc,
			md5,
			intent,
			broke,
			date,
			length,
			fname
	)		{ adler, crc, length, md5, broke, intent },

Definition at line 2180 of file png.c.

PNG_MD5

#define PNG_MD5	(		a,
			b,
			c,
			d
	)		{ a, b, c, d }, (a!=0)||(b!=0)||(c!=0)||(d!=0)

Definition at line 2179 of file png.c.

Typedef Documentation

Your_png_h_is_not_version_1_6_16

typedef png_libpng_version_1_6_16 Your_png_h_is_not_version_1_6_16

Definition at line 17 of file png.c.

Function Documentation

is_ICC_signature()

static int is_ICC_signature ( png_alloc_size_t  it )

static

Definition at line 1775 of file png.c.

References is_ICC_signature_char().

Referenced by png_icc_profile_error().

is_ICC_signature_char()

static int is_ICC_signature_char ( png_alloc_size_t  it )

static

Definition at line 1768 of file png.c.

Referenced by is_ICC_signature().

png_access_version_number()

png_uint_32 png_access_version_number

(

void

)

Definition at line 944 of file png.c.

References PNG_LIBPNG_VER.

png_ascii_from_fixed()

void png_ascii_from_fixed	(	png_const_structrp	png_ptr,
		png_charp	ascii,
		png_size_t	size,
		png_fixed_point	fp
	)

Definition at line 3141 of file png.c.

References first, and png_error().

Referenced by png_set_sCAL_fixed().

png_ascii_from_fp()

void png_ascii_from_fp	(	png_const_structrp	png_ptr,
		png_charp	ascii,
		png_size_t	size,
		double	fp,
		unsigned int	precision
	)

Definition at line 2826 of file png.c.

References png_error(), and png_pow10().

Referenced by png_set_sCAL().

png_build_16bit_table()

static void png_build_16bit_table ( png_structrp  png_ptr, png_uint_16pp *  ptable, const unsigned int  shift, const png_fixed_point  gamma_val  )

static

Definition at line 3860 of file png.c.

References max(), png_calloc(), PNG_CONST, png_gamma_16bit_correct(), png_gamma_significant(), png_malloc(), and table.

Referenced by png_build_gamma_table().

png_build_16to8_table()

static void png_build_16to8_table ( png_structrp  png_ptr, png_uint_16pp *  ptable, const unsigned int  shift, const png_fixed_point  gamma_val  )

static

Definition at line 3937 of file png.c.

References last, max(), png_calloc(), PNG_CONST, png_gamma_16bit_correct(), png_malloc(), and table.

Referenced by png_build_gamma_table().

png_build_8bit_table()

static void png_build_8bit_table ( png_structrp  png_ptr, png_bytepp  ptable, const png_fixed_point  gamma_val  )

static

Definition at line 4005 of file png.c.

References png_gamma_8bit_correct(), png_gamma_significant(), png_malloc(), and table.

Referenced by png_build_gamma_table().

png_build_gamma_table()

void png_build_gamma_table	(	png_structrp	png_ptr,
		int	bit_depth
	)

Definition at line 4084 of file png.c.

References png_struct_def::color_type, NULL, PNG_16_TO_8, png_build_16bit_table(), png_build_16to8_table(), png_build_8bit_table(), PNG_COLOR_MASK_COLOR, PNG_COMPOSE, png_debug, png_destroy_gamma_table(), PNG_FP_1, PNG_MAX_GAMMA_8, png_product2(), png_reciprocal(), png_reciprocal2(), PNG_RGB_TO_GRAY, PNG_SCALE_16_TO_8, png_warning(), and png_struct_def::transformations.

Referenced by png_init_read_transformations().

png_build_grayscale_palette()

void png_build_grayscale_palette	(	int	bit_depth,
		png_colorp	palette
	)

Definition at line 833 of file png.c.

References png_color_struct::blue, png_color_struct::green, NULL, png_debug, and png_color_struct::red.

png_calculate_crc()

void png_calculate_crc	(	png_structrp	png_ptr,
		png_const_bytep	ptr,
		png_size_t	length
	)

Definition at line 114 of file png.c.

References png_struct_def::chunk_name, png_struct_def::crc, crc, crc32(), png_struct_def::flags, length, PNG_CHUNK_ANCILLARY, PNG_FLAG_CRC_ANCILLARY_MASK, PNG_FLAG_CRC_ANCILLARY_NOWARN, PNG_FLAG_CRC_ANCILLARY_USE, and PNG_FLAG_CRC_CRITICAL_IGNORE.

Referenced by png_crc_read(), png_push_crc_finish(), png_push_read_IDAT(), png_read_chunk_header(), png_write_chunk_data(), and png_write_chunk_header().

png_check_fp_number()

int png_check_fp_number	(	png_const_charp	string,
		png_size_t	size,
		int *	statep,
		png_size_tp	whereami
	)

Definition at line 2643 of file png.c.

References png_fp_add, PNG_FP_EXPONENT, PNG_FP_FRACTION, PNG_FP_INTEGER, PNG_FP_NEGATIVE, PNG_FP_NONZERO, PNG_FP_SAW_ANY, PNG_FP_SAW_DIGIT, PNG_FP_SAW_DOT, PNG_FP_SAW_E, PNG_FP_SAW_SIGN, png_fp_set, PNG_FP_STATE, PNG_FP_WAS_VALID, and state.

Referenced by png_check_fp_string(), and png_handle_sCAL().

png_check_fp_string()

int png_check_fp_string	(	png_const_charp	string,
		png_size_t	size
	)

Definition at line 2770 of file png.c.

References png_check_fp_number(), and state.

Referenced by png_set_pCAL(), and png_set_sCAL_s().

png_check_IHDR()

void png_check_IHDR	(	png_const_structrp	png_ptr,
		png_uint_32	width,
		png_uint_32	height,
		int	bit_depth,
		int	color_type,
		int	interlace_type,
		int	compression_type,
		int	filter_type
	)

Definition at line 2476 of file png.c.

References error(), PNG_COLOR_TYPE_GRAY_ALPHA, PNG_COLOR_TYPE_PALETTE, PNG_COLOR_TYPE_RGB, PNG_COLOR_TYPE_RGB_ALPHA, PNG_COMPRESSION_TYPE_BASE, png_error(), PNG_FILTER_TYPE_BASE, PNG_FLAG_MNG_FILTER_64, png_gt, PNG_HAVE_PNG_SIGNATURE, PNG_INTERLACE_LAST, PNG_INTRAPIXEL_DIFFERENCING, PNG_SIZE_MAX, PNG_UINT_31_MAX, PNG_USER_HEIGHT_MAX, PNG_USER_WIDTH_MAX, and png_warning().

Referenced by png_get_IHDR(), and png_set_IHDR().

png_chunk_unknown_handling()

int png_chunk_unknown_handling	(	png_const_structrp	png_ptr,
		png_uint_32	chunk_name
	)

Definition at line 919 of file png.c.

References PNG_CSTRING_FROM_CHUNK, and png_handle_as_unknown().

Referenced by png_handle_unknown(), png_push_read_chunk(), png_read_end(), and png_read_info().

png_colorspace_check_gamma()

static int png_colorspace_check_gamma ( png_const_structrp  png_ptr, png_colorspacerp  colorspace, png_fixed_point  gAMA, int  from  )

static

Definition at line 1030 of file png.c.

References PNG_CHUNK_ERROR, png_chunk_report(), PNG_CHUNK_WARNING, PNG_FP_1, png_gamma_significant(), and png_muldiv().

Referenced by png_colorspace_set_gamma(), and png_colorspace_set_sRGB().

png_colorspace_check_xy()

static int png_colorspace_check_xy ( png_XYZ *  XYZ, const png_xy *  xy  )

static

Definition at line 1577 of file png.c.

References png_colorspace_endpoints_match(), png_xy_from_XYZ(), and png_XYZ_from_xy().

Referenced by png_colorspace_check_XYZ(), and png_colorspace_set_chromaticities().

png_colorspace_check_XYZ()

static int png_colorspace_check_XYZ ( png_xy *  xy, png_XYZ *  XYZ  )

static

Definition at line 1603 of file png.c.

References png_colorspace_check_xy(), png_xy_from_XYZ(), and png_XYZ_normalize().

Referenced by png_colorspace_set_endpoints().

png_colorspace_endpoints_match()

static int png_colorspace_endpoints_match ( const png_xy *  xy1, const png_xy *  xy2, int  delta  )

static

Definition at line 1551 of file png.c.

References PNG_OUT_OF_RANGE.

Referenced by png_colorspace_check_xy(), png_colorspace_set_sRGB(), and png_colorspace_set_xy_and_XYZ().

png_colorspace_set_chromaticities()

int png_colorspace_set_chromaticities	(	png_const_structrp	png_ptr,
		png_colorspacerp	colorspace,
		const png_xy *	xy,
		int	preferred
	)

Definition at line 1679 of file png.c.

References png_benign_error(), png_colorspace_check_xy(), png_colorspace_set_xy_and_XYZ(), and png_error().

Referenced by png_handle_cHRM(), and png_set_cHRM_fixed().

png_colorspace_set_endpoints()

int png_colorspace_set_endpoints	(	png_const_structrp	png_ptr,
		png_colorspacerp	colorspace,
		const png_XYZ *	XYZ_in,
		int	preferred
	)

Definition at line 1717 of file png.c.

References png_benign_error(), png_colorspace_check_XYZ(), png_colorspace_set_xy_and_XYZ(), and png_error().

Referenced by png_set_cHRM_XYZ_fixed().

png_colorspace_set_gamma()

void png_colorspace_set_gamma	(	png_const_structrp	png_ptr,
		png_colorspacerp	colorspace,
		png_fixed_point	gAMA
	)

Definition at line 1074 of file png.c.

References png_chunk_report(), PNG_CHUNK_WRITE_ERROR, png_colorspace_check_gamma(), png_const_charp, and PNG_IS_READ_STRUCT.

Referenced by png_handle_gAMA(), and png_set_gAMA_fixed().

png_colorspace_set_ICC()

int png_colorspace_set_ICC	(	png_const_structrp	png_ptr,
		png_colorspacerp	colorspace,
		png_const_charp	name,
		png_uint_32	profile_length,
		png_const_bytep	profile,
		int	color_type
	)

Definition at line 2371 of file png.c.

References name, png_icc_check_header(), png_icc_check_length(), png_icc_check_tag_table(), and png_icc_set_sRGB().

Referenced by png_set_iCCP().

png_colorspace_set_rgb_coefficients()

void png_colorspace_set_rgb_coefficients

(

png_structrp

png_ptr

)

Definition at line 2398 of file png.c.

References b, png_struct_def::flags, png_error(), and png_muldiv().

Referenced by png_init_read_transformations().

png_colorspace_set_sRGB()

int png_colorspace_set_sRGB	(	png_const_structrp	png_ptr,
		png_colorspacerp	colorspace,
		int	intent
	)

Definition at line 1833 of file png.c.

References intent, png_benign_error(), PNG_CHUNK_ERROR, png_chunk_report(), png_colorspace_check_gamma(), png_colorspace_endpoints_match(), PNG_GAMMA_sRGB_INVERSE, png_icc_profile_error(), PNG_sRGB_INTENT_LAST, and sRGB_xy.

Referenced by png_handle_sRGB(), png_icc_set_sRGB(), png_set_sRGB(), and png_set_sRGB_gAMA_and_cHRM().

png_colorspace_set_xy_and_XYZ()

static int png_colorspace_set_xy_and_XYZ ( png_const_structrp  png_ptr, png_colorspacerp  colorspace, const png_xy *  xy, const png_XYZ *  XYZ, int  preferred  )

static

Definition at line 1631 of file png.c.

References png_benign_error(), png_colorspace_endpoints_match(), and sRGB_xy.

Referenced by png_colorspace_set_chromaticities(), and png_colorspace_set_endpoints().

png_colorspace_sync()

void png_colorspace_sync	(	png_const_structrp	png_ptr,
		png_inforp	info_ptr
	)

Definition at line 1175 of file png.c.

References NULL, and png_colorspace_sync_info().

Referenced by png_handle_cHRM(), png_handle_gAMA(), png_handle_iCCP(), and png_handle_sRGB().

png_colorspace_sync_info()

void png_colorspace_sync_info	(	png_const_structrp	png_ptr,
		png_inforp	info_ptr
	)

Definition at line 1129 of file png.c.

References png_free_data(), PNG_FREE_ICCP, PNG_INFO_cHRM, PNG_INFO_gAMA, PNG_INFO_iCCP, PNG_INFO_sRGB, PNG_UNUSED, and png_info_def::valid.

Referenced by png_colorspace_sync(), png_set_cHRM_fixed(), png_set_cHRM_XYZ_fixed(), png_set_gAMA_fixed(), png_set_iCCP(), png_set_sRGB(), and png_set_sRGB_gAMA_and_cHRM().

png_compare_ICC_profile_with_sRGB()

static int png_compare_ICC_profile_with_sRGB ( png_const_structrp  png_ptr, png_const_bytep  profile, uLong  adler  )

static

Definition at line 2233 of file png.c.

References adler, adler32(), crc, crc32(), have_md5, intent, is_broken, length, NULL, PNG_CHUNK_ERROR, png_chunk_report(), PNG_CHUNK_WARNING, png_get_uint_32, PNG_OPTION_ON, PNG_SKIP_sRGB_CHECK_PROFILE, and png_sRGB_checks.

Referenced by png_icc_set_sRGB().

png_convert_to_rfc1123()

png_const_charp png_convert_to_rfc1123	(	png_structrp	png_ptr,
		png_const_timep	ptime
	)

Definition at line 744 of file png.c.

References NULL, png_convert_to_rfc1123_buffer(), png_warning(), and ptime.

png_convert_to_rfc1123_buffer()

int png_convert_to_rfc1123_buffer	(	char	out[29],
		png_const_timep	ptime
	)

Definition at line 691 of file png.c.

References APPEND, APPEND_NUMBER, APPEND_STRING, NULL, PNG_CONST, PNG_NUMBER_FORMAT_02u, PNG_NUMBER_FORMAT_u, and ptime.

Referenced by png_convert_to_rfc1123().

png_create_info_struct()

png_infop png_create_info_struct

(

png_const_structrp

png_ptr

)

Definition at line 327 of file png.c.

References NULL, png_debug, png_malloc_base(), and png_voidcast.

Referenced by Fl_PNG_Image::load_png_(), png_image_read_init(), png_image_write_init(), and save_template_cb().

png_create_png_struct()

png_structp png_create_png_struct	(	png_const_charp	user_png_ver,
		png_voidp	error_ptr,
		png_error_ptr	error_fn,
		png_error_ptr	warn_fn,
		png_voidp	mem_ptr,
		png_malloc_ptr	malloc_fn,
		png_free_ptr	free_fn
	)

Definition at line 225 of file png.c.

References NULL, z_stream_s::opaque, PNG_FUNCTION, png_malloc_warn(), png_set_error_fn(), png_set_mem_fn(), PNG_UNUSED, PNG_USER_CHUNK_CACHE_MAX, PNG_USER_CHUNK_MALLOC_MAX, PNG_USER_HEIGHT_MAX, png_user_version_check(), PNG_USER_WIDTH_MAX, png_voidcast, png_zalloc(), png_zfree(), PNGAPI, z_stream_s::zalloc, z_stream_s::zfree, and png_struct_def::zstream.

Referenced by png_create_read_struct(), png_create_read_struct_2(), png_create_write_struct(), and png_create_write_struct_2().

png_data_freer()

void png_data_freer	(	png_const_structrp	png_ptr,
		png_inforp	info_ptr,
		int	freer,
		png_uint_32	mask
	)

Definition at line 423 of file png.c.

References png_info_def::free_me, NULL, png_debug, PNG_DESTROY_WILL_FREE_DATA, png_error(), and PNG_USER_WILL_FREE_DATA.

png_destroy_gamma_table()

void png_destroy_gamma_table

(

png_structrp

png_ptr

)

Definition at line 4024 of file png.c.

References NULL, and png_free().

Referenced by png_build_gamma_table(), and png_read_destroy().

png_destroy_info_struct()

void png_destroy_info_struct	(	png_const_structrp	png_ptr,
		png_infopp	info_ptr_ptr
	)

Definition at line 359 of file png.c.

References NULL, png_debug, png_free(), PNG_FREE_ALL, and png_free_data().

Referenced by png_destroy_read_struct(), png_destroy_write_struct(), png_image_read_init(), and png_image_write_init().

png_fixed()

png_fixed_point png_fixed	(	png_const_structrp	png_ptr,
		double	fp,
		png_const_charp	text
	)

Definition at line 3219 of file png.c.

References png_fixed_error(), and PNG_UNUSED.

Referenced by png_get_sCAL_fixed(), png_set_background(), png_set_cHRM(), png_set_cHRM_XYZ(), png_set_gAMA(), and png_set_rgb_to_gray().

png_free_data()

void png_free_data	(	png_const_structrp	png_ptr,
		png_inforp	info_ptr,
		png_uint_32	mask,
		int	num
	)

Definition at line 442 of file png.c.

References png_info_def::free_me, png_info_def::height, NULL, png_info_def::num_palette, png_info_def::palette, png_debug, png_free(), PNG_FREE_HIST, PNG_FREE_ICCP, PNG_FREE_MUL, PNG_FREE_PCAL, PNG_FREE_PLTE, PNG_FREE_ROWS, PNG_FREE_SCAL, PNG_FREE_SPLT, PNG_FREE_TEXT, PNG_FREE_TRNS, PNG_FREE_UNKN, PNG_INFO_hIST, PNG_INFO_iCCP, PNG_INFO_IDAT, PNG_INFO_pCAL, PNG_INFO_PLTE, PNG_INFO_sCAL, PNG_INFO_sPLT, PNG_INFO_tRNS, and png_info_def::valid.

Referenced by png_colorspace_sync_info(), png_destroy_info_struct(), png_handle_iCCP(), png_read_png(), png_set_hIST(), png_set_iCCP(), png_set_PLTE(), png_set_rows(), and png_set_tRNS().

png_gamma_16bit_correct()

png_uint_16 png_gamma_16bit_correct	(	unsigned int	value,
		png_fixed_point	gamma_val
	)

Definition at line 3800 of file png.c.

References PNG_FP_1, and png_muldiv().

Referenced by decode_gamma(), png_build_16bit_table(), png_build_16to8_table(), png_create_colormap_entry(), png_gamma_correct(), and png_image_read_colormap().

png_gamma_8bit_correct()

png_byte png_gamma_8bit_correct	(	unsigned int	value,
		png_fixed_point	gamma_val
	)

Definition at line 3752 of file png.c.

References PNG_FP_1, and png_muldiv().

Referenced by png_build_8bit_table(), png_gamma_correct(), and png_init_read_transformations().

png_gamma_correct()

png_uint_16 png_gamma_correct	(	png_structrp	png_ptr,
		unsigned int	value,
		png_fixed_point	gamma_val
	)

Definition at line 3835 of file png.c.

References png_struct_def::bit_depth, png_gamma_16bit_correct(), and png_gamma_8bit_correct().

Referenced by png_init_read_transformations().

png_gamma_significant()

int png_gamma_significant

(

png_fixed_point

gamma_val

)

Definition at line 3400 of file png.c.

References PNG_FP_1, and PNG_GAMMA_THRESHOLD_FIXED.

Referenced by png_build_16bit_table(), png_build_8bit_table(), png_colorspace_check_gamma(), png_gamma_not_sRGB(), png_gamma_threshold(), png_image_read_direct(), png_init_read_transformations(), and set_file_encoding().

png_get_copyright()

png_const_charp png_get_copyright

(

png_const_structrp

png_ptr

)

Definition at line 764 of file png.c.

References PNG_STRING_NEWLINE, and PNG_UNUSED.

png_get_header_ver()

png_const_charp png_get_header_ver

(

png_const_structrp

png_ptr

)

Definition at line 802 of file png.c.

References PNG_LIBPNG_VER_STRING, and PNG_UNUSED.

Referenced by png_get_libpng_ver().

png_get_header_version()

png_const_charp png_get_header_version

(

png_const_structrp

png_ptr

)

Definition at line 810 of file png.c.

References PNG_HEADER_VERSION_STRING, PNG_STRING_NEWLINE, and PNG_UNUSED.

png_get_io_ptr()

png_voidp png_get_io_ptr

(

png_const_structrp

png_ptr

)

Definition at line 641 of file png.c.

References NULL.

png_get_libpng_ver()

png_const_charp png_get_libpng_ver

(

png_const_structrp

png_ptr

)

Definition at line 795 of file png.c.

References png_get_header_ver().

png_handle_as_unknown()

int png_handle_as_unknown	(	png_const_structrp	png_ptr,
		png_const_bytep	chunk_name
	)

Definition at line 884 of file png.c.

References NULL, p, png_const_bytep, and PNG_HANDLE_CHUNK_AS_DEFAULT.

Referenced by png_chunk_unknown_handling(), and write_unknown_chunks().

png_icc_check_header()

int png_icc_check_header	(	png_const_structrp	png_ptr,
		png_colorspacerp	colorspace,
		png_const_charp	name,
		png_uint_32	profile_length,
		png_const_bytep	profile,
		int	color_type
	)

Definition at line 1942 of file png.c.

References D50_nCIEXYZ, name, NULL, PNG_COLOR_MASK_COLOR, png_get_uint_32, png_icc_profile_error(), and PNG_sRGB_INTENT_LAST.

Referenced by png_colorspace_set_ICC(), and png_handle_iCCP().

png_icc_check_length()

int png_icc_check_length	(	png_const_structrp	png_ptr,
		png_colorspacerp	colorspace,
		png_const_charp	name,
		png_uint_32	profile_length
	)

Definition at line 1931 of file png.c.

References name, and png_icc_profile_error().

Referenced by png_colorspace_set_ICC(), and png_handle_iCCP().

png_icc_check_tag_table()

int png_icc_check_tag_table	(	png_const_structrp	png_ptr,
		png_colorspacerp	colorspace,
		png_const_charp	name,
		png_uint_32	profile_length,
		png_const_bytep	profile
	)

Definition at line 2125 of file png.c.

References name, NULL, png_const_bytep, png_get_uint_32, and png_icc_profile_error().

Referenced by png_colorspace_set_ICC(), and png_handle_iCCP().

png_icc_profile_error()

static int png_icc_profile_error ( png_const_structrp  png_ptr, png_colorspacerp  colorspace, png_const_charp  name, png_alloc_size_t  value, png_const_charp  reason  )

static

Definition at line 1784 of file png.c.

References Fl_Widget::flags(), is_ICC_signature(), message, name, NULL, PNG_CHUNK_ERROR, png_chunk_report(), PNG_CHUNK_WRITE_ERROR, png_format_number(), png_icc_tag_name(), PNG_NUMBER_BUFFER_SIZE, PNG_NUMBER_FORMAT_x, png_safecat(), and PNG_UNUSED.

Referenced by png_colorspace_set_sRGB(), png_icc_check_header(), png_icc_check_length(), and png_icc_check_tag_table().

png_icc_set_sRGB()

void png_icc_set_sRGB	(	png_const_structrp	png_ptr,
		png_colorspacerp	colorspace,
		png_const_bytep	profile,
		uLong	adler
	)

Definition at line 2356 of file png.c.

References adler, png_colorspace_set_sRGB(), png_compare_ICC_profile_with_sRGB(), and png_get_uint_32.

Referenced by png_colorspace_set_ICC(), and png_handle_iCCP().

png_icc_tag_char()

static char png_icc_tag_char ( png_uint_32  byte )

static

Definition at line 1747 of file png.c.

Referenced by png_icc_tag_name().

png_icc_tag_name()

static void png_icc_tag_name ( char *  name, png_uint_32  tag  )

static

Definition at line 1757 of file png.c.

References name, and png_icc_tag_char().

Referenced by png_icc_profile_error().

png_image_error()

int png_image_error	(	png_imagep	image,
		png_const_charp	error_message
	)

Definition at line 4483 of file png.c.

References png_image::message, PNG_IMAGE_ERROR, png_image_free(), png_safecat(), and png_image::warning_or_error.

Referenced by png_image_begin_read_from_file(), png_image_begin_read_from_memory(), png_image_begin_read_from_stdio(), png_image_finish_read(), png_image_read_init(), png_image_write_init(), png_image_write_to_file(), and png_image_write_to_stdio().

png_image_free()

void png_image_free

(

png_imagep

image

)

Definition at line 4467 of file png.c.

References png_control::error_buf, NULL, png_image::opaque, png_image_free_function(), and png_safe_execute().

Referenced by png_image_error(), png_image_finish_read(), png_image_write_to_stdio(), and png_safe_execute().

png_image_free_function()

static int png_image_free_function ( png_voidp  argument )

static

Definition at line 4407 of file png.c.

References png_control::for_write, png_control::info_ptr, png_struct_def::io_ptr, NULL, png_image::opaque, png_control::owned_file, png_destroy_read_struct(), png_destroy_write_struct(), png_error(), png_free(), png_control::png_ptr, and png_voidcast.

Referenced by png_image_free().

png_info_init_3()

void png_info_init_3	(	png_infopp	ptr_ptr,
		png_size_t	png_info_struct_size
	)

Definition at line 398 of file png.c.

References free(), NULL, png_debug, png_malloc_base(), and png_voidcast.

png_init_io()

void png_init_io	(	png_structrp	png_ptr,
		png_FILE_p	fp
	)

Definition at line 658 of file png.c.

References png_struct_def::io_ptr, NULL, and png_debug.

Referenced by Fl_PNG_Image::load_png_(), and save_template_cb().

png_muldiv()

int png_muldiv	(	png_fixed_point_p	res,
		png_fixed_point	a,
		png_int_32	times,
		png_int_32	divisor
	)

Definition at line 3243 of file png.c.

Referenced by png_colorspace_check_gamma(), png_colorspace_set_rgb_coefficients(), png_gamma_16bit_correct(), png_gamma_8bit_correct(), png_gamma_threshold(), png_get_pixel_aspect_ratio_fixed(), png_image_read_direct(), png_muldiv_warn(), png_product2(), png_reciprocal(), png_xy_from_XYZ(), png_XYZ_from_xy(), png_XYZ_normalize(), and ppi_from_ppm().

png_muldiv_warn()

png_fixed_point png_muldiv_warn	(	png_const_structrp	png_ptr,
		png_fixed_point	a,
		png_int_32	times,
		png_int_32	divisor
	)

Definition at line 3363 of file png.c.

References png_muldiv(), and png_warning().

Referenced by png_fixed_inches_from_microns().

png_pow10()

static double png_pow10 ( int  power )

static

Definition at line 2789 of file png.c.

Referenced by png_ascii_from_fp().

png_product2()

static png_fixed_point png_product2 ( png_fixed_point  a, png_fixed_point  b  )

static

Definition at line 3411 of file png.c.

References b, and png_muldiv().

Referenced by png_build_gamma_table(), and png_reciprocal2().

png_reciprocal()

png_fixed_point png_reciprocal

(

png_fixed_point

a

)

Definition at line 3379 of file png.c.

References png_muldiv().

Referenced by png_build_gamma_table(), png_init_read_transformations(), png_reciprocal2(), png_set_alpha_mode_fixed(), png_XYZ_from_xy(), and set_file_encoding().

png_reciprocal2()

png_fixed_point png_reciprocal2	(	png_fixed_point	a,
		png_fixed_point	b
	)

Definition at line 3434 of file png.c.

References b, png_product2(), and png_reciprocal().

Referenced by png_build_gamma_table(), and png_init_read_transformations().

png_reset_crc()

void png_reset_crc

(

png_structrp

png_ptr

)

Definition at line 102 of file png.c.

References png_struct_def::crc, crc32(), and Z_NULL.

Referenced by png_push_read_chunk(), png_push_read_IDAT(), png_read_chunk_header(), and png_write_chunk_header().

png_reset_zstream()

int png_reset_zstream

(

png_structrp

png_ptr

)

Definition at line 932 of file png.c.

References inflateReset(), NULL, Z_STREAM_ERROR, and png_struct_def::zstream.

png_save_int_32()

void png_save_int_32	(	png_bytep	buf,
		png_int_32	i
	)

Definition at line 677 of file png.c.

References buf.

Referenced by png_write_cHRM_fixed(), png_write_oFFs(), and png_write_pCAL().

png_set_option()

int png_set_option	(	png_structrp	png_ptr,
		int	option,
		int	onoff
	)

Definition at line 4217 of file png.c.

References NULL, PNG_OPTION_INVALID, and PNG_OPTION_NEXT.

png_set_sig_bytes()

void png_set_sig_bytes	(	png_structrp	png_ptr,
		int	num_bytes
	)

Definition at line 27 of file png.c.

References NULL, png_debug, png_error(), and png_struct_def::sig_bytes.

png_sig_cmp()

int png_sig_cmp	(	png_const_bytep	sig,
		png_size_t	start,
		png_size_t	num_to_check
	)

Definition at line 49 of file png.c.

References start().

Referenced by png_push_read_sig(), and png_read_sig().

png_user_version_check()

int png_user_version_check	(	png_structrp	png_ptr,
		png_const_charp	user_png_ver
	)

Definition at line 166 of file png.c.

References png_struct_def::flags, NULL, PNG_FLAG_LIBRARY_MISMATCH, PNG_LIBPNG_VER_STRING, png_safecat(), PNG_UNUSED, and png_warning().

Referenced by png_create_png_struct().

png_xy_from_XYZ()

static int png_xy_from_XYZ ( png_xy *  xy, const png_XYZ *  XYZ  )

static

Definition at line 1193 of file png.c.

References PNG_FP_1, and png_muldiv().

Referenced by png_colorspace_check_xy(), and png_colorspace_check_XYZ().

png_XYZ_from_xy()

static int png_XYZ_from_xy ( png_XYZ *  XYZ, const png_xy *  xy  )

static

Definition at line 1236 of file png.c.

References PNG_FP_1, png_muldiv(), and png_reciprocal().

Referenced by png_colorspace_check_xy().

png_XYZ_normalize()

static int png_XYZ_normalize ( png_XYZ *  XYZ )

static

Definition at line 1501 of file png.c.

References PNG_FP_1, png_muldiv(), and Y.

Referenced by png_colorspace_check_XYZ().

png_zalloc()

voidpf png_zalloc	(	voidpf	png_ptr,
		uInt	items,
		uInt	size
	)

Definition at line 73 of file png.c.

References NULL, png_malloc_warn(), png_voidcast, and png_warning().

Referenced by png_create_png_struct().

png_zfree()

void png_zfree	(	voidpf	png_ptr,
		voidpf	ptr
	)

Definition at line 93 of file png.c.

References png_const_structrp, png_free(), and png_voidcast.

Referenced by png_create_png_struct(), and png_read_destroy().

png_zstream_error()

void png_zstream_error	(	png_structrp	png_ptr,
		int	ret
	)

Definition at line 958 of file png.c.

References z_stream_s::msg, NULL, PNG_UNEXPECTED_ZLIB_RETURN, PNGZ_MSG_CAST, Z_BUF_ERROR, Z_DATA_ERROR, Z_ERRNO, Z_MEM_ERROR, Z_NEED_DICT, Z_OK, Z_STREAM_END, Z_STREAM_ERROR, Z_VERSION_ERROR, and png_struct_def::zstream.

Referenced by png_compress_IDAT(), png_decompress_chunk(), png_deflate_claim(), png_inflate(), png_inflate_claim(), png_inflate_read(), png_read_IDAT_data(), and png_text_compress().

Variable Documentation

adler

png_uint_32 adler

Definition at line 2173 of file png.c.

Referenced by adler32(), png_compare_ICC_profile_with_sRGB(), and png_icc_set_sRGB().

crc

png_uint_32 crc

Definition at line 2173 of file png.c.

Referenced by crc32(), png_calculate_crc(), png_compare_ICC_profile_with_sRGB(), and png_crc_error().

D50_nCIEXYZ

const png_byte D50_nCIEXYZ[12]

static

Initial value:

=
   { 0x00, 0x00, 0xf6, 0xd6, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0xd3, 0x2d }

Definition at line 1927 of file png.c.

Referenced by png_icc_check_header().

have_md5

png_byte have_md5

Definition at line 2175 of file png.c.

Referenced by png_compare_ICC_profile_with_sRGB().

intent

png_uint_16 intent

Definition at line 2177 of file png.c.

Referenced by png_colorspace_set_sRGB(), png_compare_ICC_profile_with_sRGB(), and png_handle_sRGB().

is_broken

png_byte is_broken

Definition at line 2176 of file png.c.

Referenced by png_compare_ICC_profile_with_sRGB().

length

png_uint_32 length

Definition at line 2173 of file png.c.

Referenced by Fl_Text_Buffer::append(), Fl_Text_Buffer::appendfile(), emit_dac(), emit_dht(), expand_buffer(), Fl_Text_Display::find_line_end(), Fl_Text_Display::find_wrap_range(), fl_filename_isdir(), Fl_GIF_Image::Fl_GIF_Image(), fl_utf8from_mb(), fl_utf8to_mb(), get_dac(), get_dht(), get_dqt(), get_dri(), get_interesting_appn(), get_lse(), get_sof(), get_sos(), Fl_Text_Display::handle(), Fl_Text_Display::line_end(), Fl_Text_Buffer::loadfile(), Fl_Text_Display::next_word(), png_cache_unknown_chunk(), png_calculate_crc(), png_compare_ICC_profile_with_sRGB(), png_crc_read(), png_default_read_data(), png_default_write_data(), png_handle_bKGD(), png_handle_cHRM(), png_handle_gAMA(), png_handle_hIST(), png_handle_iCCP(), png_handle_IEND(), png_handle_IHDR(), png_handle_iTXt(), png_handle_oFFs(), png_handle_pCAL(), png_handle_pHYs(), png_handle_PLTE(), png_handle_sBIT(), png_handle_sCAL(), png_handle_sPLT(), png_handle_sRGB(), png_handle_tEXt(), png_handle_tIME(), png_handle_tRNS(), png_handle_unknown(), png_handle_zTXt(), png_push_fill_buffer(), png_read_chunk_header(), png_read_data(), png_read_end(), png_read_info(), png_set_iCCP(), png_set_pCAL(), png_set_sPLT(), png_write_chunk(), png_write_chunk_data(), png_write_chunk_header(), png_write_chunk_start(), png_write_complete_chunk(), png_write_data(), Fl_Text_Display::position_to_line(), Fl_Text_Display::position_to_xy(), read_fdesign_line(), read_word(), Fl_Text_Display::resize(), save_marker(), Fl_Text_Buffer::savefile(), Fl_Text_Display::skip_lines(), skip_variable(), storestring(), Fl_Text_Display::string_width(), CodeEditor::style_parse(), tr_static_init(), Fl_Text_Display::wrap_mode(), Fl_Text_Display::wrap_uses_character(), write_cdata(), and write_cstring().

md5

png_uint_32 md5[4]

Definition at line 2174 of file png.c.

png_sRGB_base

const png_uint_16 png_sRGB_base[512]

Definition at line 4298 of file png.c.

png_sRGB_checks

const { ... } png_sRGB_checks[]

Referenced by png_compare_ICC_profile_with_sRGB().

png_sRGB_delta

const png_byte png_sRGB_delta[512]

Definition at line 4366 of file png.c.

png_sRGB_table

const png_uint_16 png_sRGB_table[256]

Definition at line 4258 of file png.c.

Referenced by decode_gamma(), png_create_colormap_entry(), png_image_read_background(), png_image_read_colormap(), and png_image_read_composite().

sRGB_xy

const png_xy sRGB_xy

static

Initial value:

= 
{
   
    64000, 33000,
    30000, 60000,
    15000,  6000,
    31270, 32900
}

Definition at line 1621 of file png.c.

Referenced by png_colorspace_set_sRGB(), and png_colorspace_set_xy_and_XYZ().