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- Committer: Bazaar Package Importer
- Author(s): Anibal Monsalve Salazar
- Date: 2009-05-22 09:11:26 UTC
- mfrom: (1.1.7 upstream)
- Revision ID: james.westby@ubuntu.com-20090522091126-ackh8fu2581nwuyg
Tags: 1.2.36-1
* New upstream release
* Standards-Version is 3.8.1
* debhelper compat is 7
* Run dh_prep instead of dh_clean -k
* Standards-Version is 3.8.1
* debhelper compat is 7
* Run dh_prep instead of dh_clean -k
- files added:
- libpng-1.2.36.txt
- files removed:
- libpng-1.2.35.txt
- files modified:
- ANNOUNCE
added
removed
libpng.3
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.TH LIBPNG 3 "February 14, 2009"
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.TH LIBPNG 3 "May 7, 2009"
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.SH NAME
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libpng \- Portable Network Graphics (PNG) Reference Library 1.2.35
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libpng \- Portable Network Graphics (PNG) Reference Library 1.2.36
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.SH SYNOPSIS
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\fI\fB
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\fB#include <png.h>\fP
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\fI\fB
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\fB
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#include <png.h>\fP
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\fBpng_uint_32 png_access_version_number \fI(void\fP\fB);\fP
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\fI\fB
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\fBint png_check_sig (png_bytep \fP\fIsig\fP\fB, int \fInum\fP\fB);\fP
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\fI\fB
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\fBvoid png_chunk_error (png_structp \fP\fIpng_ptr\fP\fB, png_const_charp \fIerror\fP\fB);\fP
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\fI\fB
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\fBvoid png_chunk_warning (png_structp \fP\fIpng_ptr\fP\fB, png_const_charp \fImessage\fP\fB);\fP
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\fI\fB
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\fBvoid png_convert_from_struct_tm (png_timep \fP\fIptime\fP\fB, struct tm FAR * \fIttime\fP\fB);\fP
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\fI\fB
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\fBvoid png_convert_from_time_t (png_timep \fP\fIptime\fP\fB, time_t \fIttime\fP\fB);\fP
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\fI\fB
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\fBpng_charp png_convert_to_rfc1123 (png_structp \fP\fIpng_ptr\fP\fB, png_timep \fIptime\fP\fB);\fP
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\fI\fB
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\fBpng_infop png_create_info_struct (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_structp png_create_read_struct (png_const_charp \fP\fIuser_png_ver\fP\fB, png_voidp \fP\fIerror_ptr\fP\fB, png_error_ptr \fP\fIerror_fn\fP\fB, png_error_ptr \fIwarn_fn\fP\fB);\fP
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\fI\fB
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\fBpng_structp png_create_read_struct_2(png_const_charp \fP\fIuser_png_ver\fP\fB, png_voidp \fP\fIerror_ptr\fP\fB, png_error_ptr \fP\fIerror_fn\fP\fB, png_error_ptr \fP\fIwarn_fn\fP\fB, png_voidp \fP\fImem_ptr\fP\fB, png_malloc_ptr \fP\fImalloc_fn\fP\fB, png_free_ptr \fIfree_fn\fP\fB);\fP
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\fI\fB
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\fBpng_structp png_create_write_struct (png_const_charp \fP\fIuser_png_ver\fP\fB, png_voidp \fP\fIerror_ptr\fP\fB, png_error_ptr \fP\fIerror_fn\fP\fB, png_error_ptr \fIwarn_fn\fP\fB);\fP
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\fI\fB
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\fBpng_structp png_create_write_struct_2(png_const_charp \fP\fIuser_png_ver\fP\fB, png_voidp \fP\fIerror_ptr\fP\fB, png_error_ptr \fP\fIerror_fn\fP\fB, png_error_ptr \fP\fIwarn_fn\fP\fB, png_voidp \fP\fImem_ptr\fP\fB, png_malloc_ptr \fP\fImalloc_fn\fP\fB, png_free_ptr \fIfree_fn\fP\fB);\fP
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\fI\fB
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\fBint png_debug(int \fP\fIlevel\fP\fB, png_const_charp \fImessage\fP\fB);\fP
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\fI\fB
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\fBint png_debug1(int \fP\fIlevel\fP\fB, png_const_charp \fP\fImessage\fP\fB, \fIp1\fP\fB);\fP
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\fI\fB
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\fBint png_debug2(int \fP\fIlevel\fP\fB, png_const_charp \fP\fImessage\fP\fB, \fP\fIp1\fP\fB, \fIp2\fP\fB);\fP
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\fI\fB
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\fBvoid png_destroy_info_struct (png_structp \fP\fIpng_ptr\fP\fB, png_infopp \fIinfo_ptr_ptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_destroy_read_struct (png_structpp \fP\fIpng_ptr_ptr\fP\fB, png_infopp \fP\fIinfo_ptr_ptr\fP\fB, png_infopp \fIend_info_ptr_ptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_destroy_write_struct (png_structpp \fP\fIpng_ptr_ptr\fP\fB, png_infopp \fIinfo_ptr_ptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_error (png_structp \fP\fIpng_ptr\fP\fB, png_const_charp \fIerror\fP\fB);\fP
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\fI\fB
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\fBvoid png_free (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fIptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_free_chunk_list (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_free_default(png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fIptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_free_data (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fInum\fP\fB);\fP
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\fI\fB
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\fBpng_byte png_get_bit_depth (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_bKGD (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_color_16p \fI*background\fP\fB);\fP
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\fI\fB
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\fBpng_byte png_get_channels (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_cHRM (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, double \fP\fI*white_x\fP\fB, double \fP\fI*white_y\fP\fB, double \fP\fI*red_x\fP\fB, double \fP\fI*red_y\fP\fB, double \fP\fI*green_x\fP\fB, double \fP\fI*green_y\fP\fB, double \fP\fI*blue_x\fP\fB, double \fI*blue_y\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_cHRM_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fI*white_x\fP\fB, png_uint_32 \fP\fI*white_y\fP\fB, png_uint_32 \fP\fI*red_x\fP\fB, png_uint_32 \fP\fI*red_y\fP\fB, png_uint_32 \fP\fI*green_x\fP\fB, png_uint_32 \fP\fI*green_y\fP\fB, png_uint_32 \fP\fI*blue_x\fP\fB, png_uint_32 \fI*blue_y\fP\fB);\fP
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\fI\fB
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\fBpng_byte png_get_color_type (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_byte png_get_compression_type (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_byte png_get_copyright (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_voidp png_get_error_ptr (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_byte png_get_filter_type (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_gAMA (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, double \fI*file_gamma\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_gAMA_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fI*int_file_gamma\fP\fB);\fP
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\fI\fB
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\fBpng_byte png_get_header_ver (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_byte png_get_header_version (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_hIST (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_16p \fI*hist\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_iCCP (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_charpp \fP\fIname\fP\fB, int \fP\fI*compression_type\fP\fB, png_charpp \fP\fIprofile\fP\fB, png_uint_32 \fI*proflen\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_IHDR (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fI*width\fP\fB, png_uint_32 \fP\fI*height\fP\fB, int \fP\fI*bit_depth\fP\fB, int \fP\fI*color_type\fP\fB, int \fP\fI*interlace_type\fP\fB, int \fP\fI*compression_type\fP\fB, int \fI*filter_type\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_image_height (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_image_width (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fI\fB
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\fB#if \fI!defined(PNG_1_0_X)
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\fBpng_int_32 png_get_int_32 (png_bytep \fIbuf\fP\fB);\fP
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\fI\fB#endif
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\fI\fB
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\fB#if !defined(PNG_1_0_X) png_int_32 png_get_int_32 (png_bytep buf); \fI#endif
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\fBpng_byte png_get_interlace_type (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fBpng_voidp png_get_io_ptr (png_structp \fIpng_ptr\fP\fB);\fP
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\fBpng_byte png_get_libpng_ver (png_structp \fIpng_ptr\fP\fB);\fP
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\fBpng_voidp png_get_mem_ptr(png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_oFFs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fI*offset_x\fP\fB, png_uint_32 \fP\fI*offset_y\fP\fB, int \fI*unit_type\fP\fB);\fP
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\fBpng_uint_32 png_get_pCAL (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_charp \fP\fI*purpose\fP\fB, png_int_32 \fP\fI*X0\fP\fB, png_int_32 \fP\fI*X1\fP\fB, int \fP\fI*type\fP\fB, int \fP\fI*nparams\fP\fB, png_charp \fP\fI*units\fP\fB, png_charpp \fI*params\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_pHYs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fI*res_x\fP\fB, png_uint_32 \fP\fI*res_y\fP\fB, int \fI*unit_type\fP\fB);\fP
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\fI\fB
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\fBfloat png_get_pixel_aspect_ratio (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_pixels_per_meter (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_voidp png_get_progressive_ptr (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_PLTE (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_colorp \fP\fI*palette\fP\fB, int \fI*num_palette\fP\fB);\fP
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\fI\fB
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\fBpng_byte png_get_rgb_to_gray_status (png_structp \fIpng_ptr)
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\fBpng_uint_32 png_get_rowbytes (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_byte png_get_rgb_to_gray_status (png_structp png_ptr) png_uint_32 png_get_rowbytes (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fBpng_bytepp png_get_rows (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_sBIT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_color_8p \fI*sig_bit\fP\fB);\fP
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\fI\fB
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\fBpng_bytep png_get_signature (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_sPLT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_spalette_p \fI*splt_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_sRGB (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fI*intent\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_text (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_textp \fP\fI*text_ptr\fP\fB, int \fI*num_text\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_tIME (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_timep \fI*mod_time\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_tRNS (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_bytep \fP\fI*trans\fP\fB, int \fP\fI*num_trans\fP\fB, png_color_16p \fI*trans_values\fP\fB);\fP
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\fI\fB
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\fB#if \fI!defined(PNG_1_0_X)
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\fBpng_uint_16 png_get_uint_16 (png_bytep \fIbuf\fP\fB);\fP
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\fI\fB
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\fB#if !defined(PNG_1_0_X) png_uint_16 png_get_uint_16 (png_bytep \fIbuf\fP\fB);\fP
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\fBpng_uint_32 png_get_uint_31 (png_bytep \fIbuf\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_uint_32 (png_bytep \fIbuf\fP\fB);\fP
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\fI\fB#endif
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\fBpng_uint_32 png_get_uint_32 (png_bytep buf); \fI#endif
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\fBpng_uint_32 png_get_unknown_chunks (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_unknown_chunkpp \fIunknowns\fP\fB);\fP
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\fI\fB
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\fBpng_voidp png_get_user_chunk_ptr (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_user_height_max( png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_voidp png_get_user_transform_ptr (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_user_width_max (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_valid (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIflag\fP\fB);\fP
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\fI\fB
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\fBpng_int_32 png_get_x_offset_microns (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_int_32 png_get_x_offset_pixels (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_x_pixels_per_meter (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_int_32 png_get_y_offset_microns (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_int_32 png_get_y_offset_pixels (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_get_y_pixels_per_meter (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fBpng_uint_32 png_get_compression_buffer_size (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBint png_handle_as_unknown (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fIchunk_name\fP\fB);\fP
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\fBvoid png_init_io (png_structp \fP\fIpng_ptr\fP\fB, FILE \fI*fp\fP\fB);\fP
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\fBDEPRECATED: void png_info_init (png_infop \fIinfo_ptr\fP\fB);\fP
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\fBDEPRECATED: void png_info_init_2 (png_infopp \fP\fIptr_ptr\fP\fB, png_size_t \fIpng_info_struct_size\fP\fB);\fP
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\fBpng_voidp png_malloc (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIsize\fP\fB);\fP
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\fBpng_voidp png_malloc_default(png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIsize\fP\fB);\fP
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\fI\fB
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\fBvoidp png_memcpy (png_voidp \fP\fIs1\fP\fB, png_voidp \fP\fIs2\fP\fB, png_size_t \fIsize\fP\fB);\fP
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\fBpng_voidp png_memcpy_check (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIs1\fP\fB, png_voidp \fP\fIs2\fP\fB, png_uint_32 \fIsize\fP\fB);\fP
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\fBvoidp png_memset (png_voidp \fP\fIs1\fP\fB, int \fP\fIvalue\fP\fB, png_size_t \fIsize\fP\fB);\fP
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\fBpng_voidp png_memset_check (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIs1\fP\fB, int \fP\fIvalue\fP\fB, png_uint_32 \fIsize\fP\fB);\fP
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\fBDEPRECATED: void png_permit_empty_plte (png_structp \fP\fIpng_ptr\fP\fB, int \fIempty_plte_permitted\fP\fB);\fP
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\fBvoid png_process_data (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_bytep \fP\fIbuffer\fP\fB, png_size_t \fIbuffer_size\fP\fB);\fP
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\fBvoid png_progressive_combine_row (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIold_row\fP\fB, png_bytep \fInew_row\fP\fB);\fP
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\fBvoid png_read_destroy (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_infop \fIend_info_ptr\fP\fB);\fP
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\fBvoid png_read_end (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fBvoid png_read_image (png_structp \fP\fIpng_ptr\fP\fB, png_bytepp \fIimage\fP\fB);\fP
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\fBDEPRECATED: void png_read_init (png_structp \fIpng_ptr\fP\fB);\fP
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\fBDEPRECATED: void png_read_init_2 (png_structpp \fP\fIptr_ptr\fP\fB, png_const_charp \fP\fIuser_png_ver\fP\fB, png_size_t \fP\fIpng_struct_size\fP\fB, png_size_t \fIpng_info_size\fP\fB);\fP
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\fBvoid png_read_info (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_read_png (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fP\fItransforms\fP\fB, png_voidp \fIparams\fP\fB);\fP
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\fBvoid png_read_row (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIrow\fP\fB, png_bytep \fIdisplay_row\fP\fB);\fP
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\fBvoid png_read_rows (png_structp \fP\fIpng_ptr\fP\fB, png_bytepp \fP\fIrow\fP\fB, png_bytepp \fP\fIdisplay_row\fP\fB, png_uint_32 \fInum_rows\fP\fB);\fP
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\fBvoid png_read_update_info (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fB#if \fI!defined(PNG_1_0_X)
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\fBpng_save_int_32 (png_bytep \fP\fIbuf\fP\fB, png_int_32 \fIi\fP\fB);\fP
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\fB#if !defined(PNG_1_0_X) png_save_int_32 (png_bytep \fP\fIbuf\fP\fB, png_int_32 \fIi\fP\fB);\fP
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\fBvoid png_save_uint_16 (png_bytep \fP\fIbuf\fP\fB, unsigned int \fIi\fP\fB);\fP
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\fBvoid png_save_uint_32 (png_bytep \fP\fIbuf\fP\fB, png_uint_32 \fIi\fP\fB);\fP
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\fBvoid png_set_add_alpha (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIfiller\fP\fB, int \fIflags\fP\fB);\fP
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\fI\fB#endif
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\fBvoid png_set_add_alpha (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIfiller\fP\fB, int flags); \fI#endif
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\fBvoid png_set_background (png_structp \fP\fIpng_ptr\fP\fB, png_color_16p \fP\fIbackground_color\fP\fB, int \fP\fIbackground_gamma_code\fP\fB, int \fP\fIneed_expand\fP\fB, double \fIbackground_gamma\fP\fB);\fP
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\fBvoid png_set_bgr (png_structp \fIpng_ptr\fP\fB);\fP
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\fBvoid png_set_bKGD (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_color_16p \fIbackground\fP\fB);\fP
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\fBvoid png_set_cHRM (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, double \fP\fIwhite_x\fP\fB, double \fP\fIwhite_y\fP\fB, double \fP\fIred_x\fP\fB, double \fP\fIred_y\fP\fB, double \fP\fIgreen_x\fP\fB, double \fP\fIgreen_y\fP\fB, double \fP\fIblue_x\fP\fB, double \fIblue_y\fP\fB);\fP
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\fBvoid png_set_cHRM_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fIwhite_x\fP\fB, png_uint_32 \fP\fIwhite_y\fP\fB, png_uint_32 \fP\fIred_x\fP\fB, png_uint_32 \fP\fIred_y\fP\fB, png_uint_32 \fP\fIgreen_x\fP\fB, png_uint_32 \fP\fIgreen_y\fP\fB, png_uint_32 \fP\fIblue_x\fP\fB, png_uint_32 \fIblue_y\fP\fB);\fP
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\fBvoid png_set_compression_level (png_structp \fP\fIpng_ptr\fP\fB, int \fIlevel\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_compression_mem_level (png_structp \fP\fIpng_ptr\fP\fB, int \fImem_level\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_compression_method (png_structp \fP\fIpng_ptr\fP\fB, int \fImethod\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_compression_strategy (png_structp \fP\fIpng_ptr\fP\fB, int \fIstrategy\fP\fB);\fP
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\fBvoid png_set_compression_window_bits (png_structp \fP\fIpng_ptr\fP\fB, int \fIwindow_bits\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_crc_action (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fIcrit_action\fP\fB, int \fIancil_action\fP\fB);\fP
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\fBvoid png_set_dither (png_structp \fP\fIpng_ptr\fP\fB, png_colorp \fP\fIpalette\fP\fB, int \fP\fInum_palette\fP\fB, int \fP\fImaximum_colors\fP\fB, png_uint_16p \fP\fIhistogram\fP\fB, int \fIfull_dither\fP\fB);\fP
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\fBvoid png_set_error_fn (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIerror_ptr\fP\fB, png_error_ptr \fP\fIerror_fn\fP\fB, png_error_ptr \fIwarning_fn\fP\fB);\fP
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\fBvoid png_set_expand (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_expand_gray_1_2_4_to_8(png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_filler (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIfiller\fP\fB, int \fIflags\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_filter (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fImethod\fP\fB, int \fIfilters\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_filter_heuristics (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fIheuristic_method\fP\fB, int \fP\fInum_weights\fP\fB, png_doublep \fP\fIfilter_weights\fP\fB, png_doublep \fIfilter_costs\fP\fB);\fP
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\fBvoid png_set_flush (png_structp \fP\fIpng_ptr\fP\fB, int \fInrows\fP\fB);\fP
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\fBvoid png_set_gamma (png_structp \fP\fIpng_ptr\fP\fB, double \fP\fIscreen_gamma\fP\fB, double \fIdefault_file_gamma\fP\fB);\fP
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\fBvoid png_set_gAMA (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, double \fIfile_gamma\fP\fB);\fP
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\fBvoid png_set_gAMA_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIfile_gamma\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_gray_1_2_4_to_8(png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_gray_to_rgb (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_hIST (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_16p \fIhist\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_iCCP (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_charp \fP\fIname\fP\fB, int \fP\fIcompression_type\fP\fB, png_charp \fP\fIprofile\fP\fB, png_uint_32 \fIproflen\fP\fB);\fP
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\fI\fB
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\fBint png_set_interlace_handling (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_invalid (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fImask\fP\fB);\fP
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\fBvoid png_set_invert_alpha (png_structp \fIpng_ptr\fP\fB);\fP
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\fBvoid png_set_invert_mono (png_structp \fIpng_ptr\fP\fB);\fP
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\fBvoid png_set_IHDR (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fIwidth\fP\fB, png_uint_32 \fP\fIheight\fP\fB, int \fP\fIbit_depth\fP\fB, int \fP\fIcolor_type\fP\fB, int \fP\fIinterlace_type\fP\fB, int \fP\fIcompression_type\fP\fB, int \fIfilter_type\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_keep_unknown_chunks (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fIkeep\fP\fB, png_bytep \fP\fIchunk_list\fP\fB, int \fInum_chunks\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_mem_fn(png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fImem_ptr\fP\fB, png_malloc_ptr \fP\fImalloc_fn\fP\fB, png_free_ptr \fIfree_fn\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_oFFs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fIoffset_x\fP\fB, png_uint_32 \fP\fIoffset_y\fP\fB, int \fIunit_type\fP\fB);\fP
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\fBvoid png_set_packing (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_packswap (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_palette_to_rgb(png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_pCAL (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_charp \fP\fIpurpose\fP\fB, png_int_32 \fP\fIX0\fP\fB, png_int_32 \fP\fIX1\fP\fB, int \fP\fItype\fP\fB, int \fP\fInparams\fP\fB, png_charp \fP\fIunits\fP\fB, png_charpp \fIparams\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_pHYs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fIres_x\fP\fB, png_uint_32 \fP\fIres_y\fP\fB, int \fIunit_type\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_progressive_read_fn (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIprogressive_ptr\fP\fB, png_progressive_info_ptr \fP\fIinfo_fn\fP\fB, png_progressive_row_ptr \fP\fIrow_fn\fP\fB, png_progressive_end_ptr \fIend_fn\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_PLTE (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_colorp \fP\fIpalette\fP\fB, int \fInum_palette\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_read_fn (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIio_ptr\fP\fB, png_rw_ptr \fIread_data_fn\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_read_status_fn (png_structp \fP\fIpng_ptr\fP\fB, png_read_status_ptr \fIread_row_fn\fP\fB);\fP
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\fBvoid png_set_read_user_transform_fn (png_structp \fP\fIpng_ptr\fP\fB, png_user_transform_ptr \fIread_user_transform_fn\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_rgb_to_gray (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fIerror_action\fP\fB, double \fP\fIred\fP\fB, double \fIgreen\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_rgb_to_gray_fixed (png_structp \fP\fIpng_ptr\fP\fB, int error_action png_fixed_point \fP\fIred\fP\fB, png_fixed_point \fIgreen\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_rows (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_bytepp \fIrow_pointers\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_sBIT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_color_8p \fIsig_bit\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_sCAL (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_charp \fP\fIunit\fP\fB, double \fP\fIwidth\fP\fB, double \fIheight\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_shift (png_structp \fP\fIpng_ptr\fP\fB, png_color_8p \fItrue_bits\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_sig_bytes (png_structp \fP\fIpng_ptr\fP\fB, int \fInum_bytes\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_sPLT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_spalette_p \fP\fIsplt_ptr\fP\fB, int \fInum_spalettes\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_sRGB (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fIintent\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_sRGB_gAMA_and_cHRM (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fIintent\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_strip_16 (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_strip_alpha (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_swap (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_swap_alpha (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_text (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_textp \fP\fItext_ptr\fP\fB, int \fInum_text\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_tIME (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_timep \fImod_time\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_tRNS (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_bytep \fP\fItrans\fP\fB, int \fP\fInum_trans\fP\fB, png_color_16p \fItrans_values\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_tRNS_to_alpha(png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBpng_uint_32 png_set_unknown_chunks (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_unknown_chunkp \fP\fIunknowns\fP\fB, int \fP\fInum\fP\fB, int \fIlocation\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_unknown_chunk_location(png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fP\fIchunk\fP\fB, int \fIlocation\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_read_user_chunk_fn (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIuser_chunk_ptr\fP\fB, png_user_chunk_ptr \fIread_user_chunk_fn\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_user_limits (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIuser_width_max\fP\fB, png_uint_32 \fIuser_height_max\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_user_transform_info (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIuser_transform_ptr\fP\fB, int \fP\fIuser_transform_depth\fP\fB, int \fIuser_transform_channels\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_write_fn (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIio_ptr\fP\fB, png_rw_ptr \fP\fIwrite_data_fn\fP\fB, png_flush_ptr \fIoutput_flush_fn\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_write_status_fn (png_structp \fP\fIpng_ptr\fP\fB, png_write_status_ptr \fIwrite_row_fn\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_write_user_transform_fn (png_structp \fP\fIpng_ptr\fP\fB, png_user_transform_ptr \fIwrite_user_transform_fn\fP\fB);\fP
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\fI\fB
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\fBvoid png_set_compression_buffer_size(png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIsize\fP\fB);\fP
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731
\fI\fB
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\fBint png_sig_cmp (png_bytep \fP\fIsig\fP\fB, png_size_t \fP\fIstart\fP\fB, png_size_t \fInum_to_check\fP\fB);\fP
734
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735
\fI\fB
736
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\fBvoid png_start_read_image (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_warning (png_structp \fP\fIpng_ptr\fP\fB, png_const_charp \fImessage\fP\fB);\fP
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\fI\fB
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\fBvoid png_write_chunk (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIchunk_name\fP\fB, png_bytep \fP\fIdata\fP\fB, png_size_t \fIlength\fP\fB);\fP
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\fI\fB
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\fBvoid png_write_chunk_data (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIdata\fP\fB, png_size_t \fIlength\fP\fB);\fP
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\fI\fB
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\fBvoid png_write_chunk_end (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_write_chunk_start (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIchunk_name\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
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\fI\fB
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\fBvoid png_write_destroy (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_write_end (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_write_flush (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_write_image (png_structp \fP\fIpng_ptr\fP\fB, png_bytepp \fIimage\fP\fB);\fP
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\fI\fB
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\fBDEPRECATED: void png_write_init (png_structp \fIpng_ptr\fP\fB);\fP
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\fI\fB
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\fBDEPRECATED: void png_write_init_2 (png_structpp \fP\fIptr_ptr\fP\fB, png_const_charp \fP\fIuser_png_ver\fP\fB, png_size_t \fP\fIpng_struct_size\fP\fB, png_size_t \fIpng_info_size\fP\fB);\fP
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\fI\fB
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\fBvoid png_write_info (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_write_info_before_PLTE (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
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\fI\fB
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\fBvoid png_write_png (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fP\fItransforms\fP\fB, png_voidp \fIparams\fP\fB);\fP
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\fI\fB
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\fBvoid png_write_row (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fIrow\fP\fB);\fP
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\fI\fB
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\fBvoid png_write_rows (png_structp \fP\fIpng_ptr\fP\fB, png_bytepp \fP\fIrow\fP\fB, png_uint_32 \fInum_rows\fP\fB);\fP
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\fI\fB
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\fBvoidpf png_zalloc (voidpf \fP\fIpng_ptr\fP\fB, uInt \fP\fIitems\fP\fB, uInt \fIsize\fP\fB);\fP
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\fI\fB
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\fBvoid png_zfree (voidpf \fP\fIpng_ptr\fP\fB, voidpf \fIptr\fP\fB);\fP
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811
\fI\fB
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.SH DESCRIPTION
814
403
The
815
404
.I libpng
821
410
.SH LIBPNG.TXT
822
411
libpng.txt - A description on how to use and modify libpng
823
412
824
libpng version 1.2.35 - February 14, 2009
413
libpng version 1.2.36 - May 7, 2009
825
414
Updated and distributed by Glenn Randers-Pehrson
826
415
<glennrp at users.sourceforge.net>
827
Copyright (c) 1998-2008 Glenn Randers-Pehrson
416
Copyright (c) 1998-2009 Glenn Randers-Pehrson
828
417
For conditions of distribution and use, see copyright
829
418
notice in png.h.
830
419
831
420
Based on:
832
421
833
libpng versions 0.97, January 1998, through 1.2.35 - February 14, 2009
422
libpng versions 0.97, January 1998, through 1.2.36 - May 7, 2009
834
423
Updated and distributed by Glenn Randers-Pehrson
835
Copyright (c) 1998-2008 Glenn Randers-Pehrson
424
Copyright (c) 1998-2009 Glenn Randers-Pehrson
836
425
837
426
libpng 1.0 beta 6 version 0.96 May 28, 1997
838
427
Updated and distributed by Andreas Dilger
962
551
will also want to insure that you are, in fact, dealing with a PNG
963
552
file. Libpng provides a simple check to see if a file is a PNG file.
964
553
To use it, pass in the first 1 to 8 bytes of the file to the function
965
png_sig_cmp(), and it will return 0 if the bytes match the corresponding
966
bytes of the PNG signature, or nonzero otherwise. Of course, the more bytes
967
you pass in, the greater the accuracy of the prediction.
554
png_sig_cmp(), and it will return 0 (false) if the bytes match the
555
corresponding bytes of the PNG signature, or nonzero (true) otherwise.
556
Of course, the more bytes you pass in, the greater the accuracy of the
557
prediction.
968
558
969
559
If you are intending to keep the file pointer open for use in libpng,
970
560
you must ensure you don't read more than 8 bytes from the beginning
1228
818
(int)sizeof(unused_chunks)/5);
1229
819
#endif
1230
820
821
.SS User limits
822
823
The PNG specification allows the width and height of an image to be as
824
large as 2^31-1 (0x7fffffff), or about 2.147 billion rows and columns.
825
Since very few applications really need to process such large images,
826
we have imposed an arbitrary 1-million limit on rows and columns.
827
Larger images will be rejected immediately with a png_error() call. If
828
you wish to override this limit, you can use
829
830
png_set_user_limits(png_ptr, width_max, height_max);
831
832
to set your own limits, or use width_max = height_max = 0x7fffffffL
833
to allow all valid dimensions (libpng may reject some very large images
834
anyway because of potential buffer overflow conditions).
835
836
You should put this statement after you create the PNG structure and
837
before calling png_read_info(), png_read_png(), or png_process_data().
838
If you need to retrieve the limits that are being applied, use
839
840
width_max = png_get_user_width_max(png_ptr);
841
height_max = png_get_user_height_max(png_ptr);
1231
842
1232
843
.SS The high-level read interface
1233
844
1671
1282
1672
1283
As of libpng version 1.2.9, png_set_expand_gray_1_2_4_to_8() was
1673
1284
added. It expands the sample depth without changing tRNS to alpha.
1674
At the same time, png_set_gray_1_2_4_to_8() was deprecated, and it
1675
will be removed from a future version.
1676
1677
1285
1678
1286
PNG can have files with 16 bits per channel. If you only can handle
1679
1287
8 bits per channel, this will strip the pixels down to 8 bit.
2890
2498
PNG_TRANSFORM_INVERT_ALPHA Change alpha from opacity
2891
2499
to transparency
2892
2500
PNG_TRANSFORM_SWAP_ENDIAN Byte-swap 16-bit samples
2893
PNG_TRANSFORM_STRIP_FILLER Strip out filler bytes.
2501
PNG_TRANSFORM_STRIP_FILLER Strip out filler
2502
bytes (deprecated).
2503
PNG_TRANSFORM_STRIP_FILLER_BEFORE Strip out leading
2504
filler bytes
2505
PNG_TRANSFORM_STRIP_FILLER_AFTER Strip out trailing
2506
filler bytes
2894
2507
2895
2508
If you have valid image data in the info structure (you can use
2896
2509
png_set_rows() to put image data in the info structure), simply do this:
3297
2910
png_bytep data, png_size_t length);
3298
2911
void user_flush_data(png_structp png_ptr);
3299
2912
2913
The user_read_data() function is responsible for detecting and
2914
handling end-of-data errors.
2915
3300
2916
Supplying NULL for the read, write, or flush functions sets them back
3301
to using the default C stream functions. It is an error to read from
3302
a write stream, and vice versa.
2917
to using the default C stream functions, which expect the io_ptr to
2918
point to a standard *FILE structure. It is probably a mistake
2919
to use NULL for one of write_data_fn and output_flush_fn but not both
2920
of them, unless you have built libpng with PNG_NO_WRITE_FLUSH defined.
2921
It is an error to read from a write stream, and vice versa.
3303
2922
3304
2923
Error handling in libpng is done through png_error() and png_warning().
3305
2924
Errors handled through png_error() are fatal, meaning that png_error()
3404
3023
3405
3024
.SS Configuring for compiler xxx:
3406
3025
3407
All includes for libpng are in pngconf.h. If you need to add/change/delete
3408
an include, this is the place to do it. The includes that are not
3409
needed outside libpng are protected by the PNG_INTERNAL definition,
3410
which is only defined for those routines inside libpng itself. The
3411
files in libpng proper only include png.h, which includes pngconf.h.
3026
All includes for libpng are in pngconf.h. If you need to add, change
3027
or delete an include, this is the place to do it.
3028
The includes that are not needed outside libpng are protected by the
3029
PNG_INTERNAL definition, which is only defined for those routines inside
3030
libpng itself. The files in libpng proper only include png.h, which
3031
includes pngconf.h.
3412
3032
3413
3033
.SS Configuring zlib:
3414
3034
3599
3219
having level = 0 will be printed. There aren't any such statements in
3600
3220
this version of libpng, but if you insert some they will be printed.
3601
3221
3602
.SH VII. MNG support
3222
.SH VI. MNG support
3603
3223
3604
3224
The MNG specification (available at http://www.libpng.org/pub/mng) allows
3605
3225
certain extensions to PNG for PNG images that are embedded in MNG datastreams.
3624
3244
them. You may wish to consider using libmng (available at
3625
3245
http://www.libmng.com) instead.
3626
3246
3627
.SH VIII. Changes to Libpng from version 0.88
3247
.SH VII. Changes to Libpng from version 0.88
3628
3248
3629
3249
It should be noted that versions of libpng later than 0.96 are not
3630
3250
distributed by the original libpng author, Guy Schalnat, nor by
3673
3293
3674
3294
png_uint_32 application_vn = PNG_LIBPNG_VER;
3675
3295
3676
.SH IX. Y2K Compliance in libpng
3677
3678
February 14, 2009
3296
.SH VIII. Changes to Libpng from version 1.0.x to 1.2.x
3297
3298
Support for user memory management was enabled by default. To
3299
accomplish this, the functions png_create_read_struct_2(),
3300
png_create_write_struct_2(), png_set_mem_fn(), png_get_mem_ptr(),
3301
png_malloc_default(), and png_free_default() were added.
3302
3303
Support for certain MNG features was enabled.
3304
3305
Support for numbered error messages was added. However, we never got
3306
around to actually numbering the error messages. The function
3307
png_set_strip_error_numbers() was added (Note: the prototype for this
3308
function was inadvertently removed from png.h in PNG_NO_ASSEMBLER_CODE
3309
builds of libpng-1.2.15. It was restored in libpng-1.2.36).
3310
3311
The png_malloc_warn() function was added at libpng-1.2.3. This issues
3312
a png_warning and returns NULL instead of aborting when it fails to
3313
acquire the requested memory allocation.
3314
3315
Support for setting user limits on image width and height was enabled
3316
by default. The functions png_set_user_limits(), png_get_user_width_max(),
3317
and png_get_user_height_max() were added at libpng-1.2.6.
3318
3319
The png_set_add_alpha() function was added at libpng-1.2.7.
3320
3321
The function png_set_expand_gray_1_2_4_to_8() was added at libpng-1.2.9.
3322
Unlike png_set_gray_1_2_4_to_8(), the new function does not expand the
3323
tRNS chunk to alpha. The png_set_gray_1_2_4_to_8() function is
3324
deprecated.
3325
3326
A number of macro definitions in support of runtime selection of
3327
assembler code features (especially Intel MMX code support) were
3328
added at libpng-1.2.0:
3329
3330
PNG_ASM_FLAG_MMX_SUPPORT_COMPILED
3331
PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU
3332
PNG_ASM_FLAG_MMX_READ_COMBINE_ROW
3333
PNG_ASM_FLAG_MMX_READ_INTERLACE
3334
PNG_ASM_FLAG_MMX_READ_FILTER_SUB
3335
PNG_ASM_FLAG_MMX_READ_FILTER_UP
3336
PNG_ASM_FLAG_MMX_READ_FILTER_AVG
3337
PNG_ASM_FLAG_MMX_READ_FILTER_PAETH
3338
PNG_ASM_FLAGS_INITIALIZED
3339
PNG_MMX_READ_FLAGS
3340
PNG_MMX_FLAGS
3341
PNG_MMX_WRITE_FLAGS
3342
PNG_MMX_FLAGS
3343
3344
We added the following functions in support of runtime
3345
selection of assembler code features:
3346
3347
png_get_mmx_flagmask()
3348
png_set_mmx_thresholds()
3349
png_get_asm_flags()
3350
png_get_mmx_bitdepth_threshold()
3351
png_get_mmx_rowbytes_threshold()
3352
png_set_asm_flags()
3353
3354
We replaced all of these functions with simple stubs in libpng-1.2.20,
3355
when the Intel assembler code was removed due to a licensing issue.
3356
3357
.SH IX. (Omitted)
3358
.SH X. Y2K Compliance in libpng
3359
3360
May 7, 2009
3679
3361
3680
3362
Since the PNG Development group is an ad-hoc body, we can't make
3681
3363
an official declaration.
3682
3364
3683
3365
This is your unofficial assurance that libpng from version 0.71 and
3684
upward through 1.2.35 are Y2K compliant. It is my belief that earlier
3366
upward through 1.2.36 are Y2K compliant. It is my belief that earlier
3685
3367
versions were also Y2K compliant.
3686
3368
3687
3369
Libpng only has three year fields. One is a 2-byte unsigned integer that
3943
3625
1.2.35rc01-02 13 10235 12.so.0.35[.0]
3944
3626
1.0.43 10 10043 10.so.0.43[.0]
3945
3627
1.2.35 13 10235 12.so.0.35[.0]
3628
1.2.36beta01-05 13 10236 12.so.0.36[.0]
3629
1.2.36rc01 13 10236 12.so.0.36[.0]
3630
1.0.44 10 10044 10.so.0.44[.0]
3631
1.2.36 13 10236 12.so.0.36[.0]
3946
3632
3947
3633
Henceforth the source version will match the shared-library minor
3948
3634
and patch numbers; the shared-library major version number will be
3998
3684
3999
3685
Thanks to Frank J. T. Wojcik for helping with the documentation.
4000
3686
4001
Libpng version 1.2.35 - February 14, 2009:
3687
Libpng version 1.2.36 - May 7, 2009:
4002
3688
Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
4003
3689
Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
4004
3690
4019
3705
If you modify libpng you may insert additional notices immediately following
4020
3706
this sentence.
4021
3707
4022
libpng versions 1.2.6, August 15, 2004, through 1.2.35, February 14, 2009, are
3708
libpng versions 1.2.6, August 15, 2004, through 1.2.36, May 7, 2009, are
4023
3709
Copyright (c) 2004,2006-2008 Glenn Randers-Pehrson, and are
4024
3710
distributed according to the same disclaimer and license as libpng-1.2.5
4025
3711
with the following individual added to the list of Contributing Authors
4118
3804
4119
3805
Glenn Randers-Pehrson
4120
3806
glennrp at users.sourceforge.net
4121
February 14, 2009
3807
May 7, 2009
4122
3808
4123
3809
.\" end of man page
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Loggerhead is a web-based interface for Breezy
Version: 2.0.1