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[master] 3cbf11a - Use "symbol prefixing" in bundled libs (part 1 of 3)

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[master] 3cbf11a - Use "symbol prefixing" in bundled libs (part 1 of 3) "Albrecht Schlosser" Nov 16, 2021  
 
commit 3cbf11af8de5abadc9b15f2d9c77ee2311b7b47f
Author:     Albrecht Schlosser <albrechts.fltk@online.de>
AuthorDate: Mon May 31 18:04:49 2021 +0200
Commit:     Albrecht Schlosser <albrechts.fltk@online.de>
CommitDate: Sun Nov 14 19:31:25 2021 +0100

    Use "symbol prefixing" in bundled libs (part 1 of 3)
    
    Add prefix 'fltk_' to bundled libpng.

 README.bundled-libs.txt |  48 ++++++---
 png/CMakeLists.txt      |   2 +-
 png/Makefile            |   2 +
 png/pnglibconf.h        | 255 ++++++++++++++++++++++++++++++++++++++++++++++++
 png/pngprefix.h         | 166 +++++++++++++++++++++++++++++++
 5 files changed, 459 insertions(+), 14 deletions(-)

diff --git README.bundled-libs.txt README.bundled-libs.txt
index 4bf8c72..1f50fd2 100644
--- README.bundled-libs.txt
+++ README.bundled-libs.txt
@@ -5,6 +5,15 @@ This file is mainly intended for FLTK developers and contains information
 about the current versions of all bundled libraries and about how to
 upgrade these bundled libraries.
 
+Starting with FLTK 1.4.0 the bundled libraries jpeg, png, and zlib use
+"symbol prefixing" with the prefix 'fltk_' for all external symbols to
+distinguish the bundled libraries from existing system libraries and
+to avoid runtime errors.
+
+User code compiled correctly with the header files provided by the
+bundled image libraries need not be changed.
+
+The nanosvg library is not affected.
 
 Current versions of bundled libraries (as of Sep 13, 2021):
 
@@ -40,14 +49,18 @@ General information:
   We use our own build files, hence a few files MUST NOT be upgraded when
   the library source files are upgraded. We strive to keep changes to the
   library source files as small as possible. Patching library code to
-  work with FLTK should be a rare exception.
+  work with FLTK should be a rare exception. Symbol prefixing with prefix
+  'fltk_' is one such exception to the rule.
 
   If patches are necessary all changes in the library files should be
   marked with "FLTK" in a comment so a developer who upgrades the library
-  later is aware of changes in the source code for FLTK. Additional comments
-  should be added to show the rationale, i.e. why a particular change was
-  necessary. If applicable, add a reference to a Software Trouble Report,
-  GitHub Issue or PR like "STR 3456", "Issue #123", or "PR #234".
+  later is aware of changes in the source code for FLTK. Look for 'FLTK'
+  and/or 'fltk_' to find the differences.
+
+  Additional comments should be added to show the rationale, i.e. why
+  a particular change was necessary. If applicable, add a reference to
+  a Software Trouble Report, GitHub Issue or Pull Request (PR) like
+  "STR 3456", "Issue #123", or "PR #234".
 
 
 How to update the bundled libraries:
@@ -68,10 +81,11 @@ How to update the bundled libraries:
 Merging source files:
 
   Please check if some source and header files contain "FLTK" comments
-  to be aware of necessary merges. It is also good to get the distribution
-  tar ball of the previous version and to run a (graphical) diff or
-  merge tool on the previous version and the bundled version of FLTK
-  to see the "previous" differences.
+  and/or 'fltk_' symbol prefixing to be aware of necessary merges.
+  It is also good to download the distribution tar ball or Git source
+  files of the previous version and to run a (graphical) diff or merge
+  tool on the previous version and the bundled version of FLTK to see
+  the "previous" differences.
 
   Files that were not patched in previous versions should be copied to
   the new version w/o changes. Files that had FLTK specific patches must
@@ -102,9 +116,9 @@ Tests after merge:
 
 Upgrade notes for specific libraries:
 
-  The following chapters contain information of specific files and how
-  they are upgraded. Since the changes in all bundled libraries can't
-  be known in advance this information may change in the future. Please
+  The following chapters contain informations about specific files and
+  how they are upgraded. Since the changes in all bundled libraries are
+  not known in advance this information may change in the future. Please
   verify that no other changes are necessary.
 
 
@@ -140,13 +154,21 @@ png:
 
   libpng should be upgraded after zlib because it depends on zlib.
 
+  Download the latest libpng sources, `cd' to /path-to/libpng and run
+
+    $ ./configure --with-libpng-prefix=fltk_
+
+  This creates the header files 'pnglibconf.h' and 'pngprefix.h'
+  with the 'fltk_' symbol prefix.
+
   The following files need special handling:
 
     CMakeLists.txt: Keep FLTK version, update manually if necessary.
 
     Makefile: Same as CMakeLists.txt.
 
-    pnglibconf.h: Generate on a Linux system and merge.
+    pnglibconf.h: Generate on a Linux system and merge (see above).
+    pngprefix.h:  Generate on a Linux system and merge (see above).
 
     makedepend: Keep this file.
 
diff --git png/CMakeLists.txt png/CMakeLists.txt
index a67c7eb..117d699 100644
--- png/CMakeLists.txt
+++ png/CMakeLists.txt
@@ -65,6 +65,6 @@ endif ()
 # Install the library headers
 #######################################################################
 
-install (FILES png.h pngconf.h pnglibconf.h
+install (FILES png.h pngconf.h pnglibconf.h pngprefix.h
          DESTINATION ${FLTK_INCLUDEDIR}/FL/images
 )
diff --git png/Makefile png/Makefile
index e686bd9..2f913d6 100644
--- png/Makefile
+++ png/Makefile
@@ -59,6 +59,7 @@ install: $(LIBPNG)
 	$(INSTALL_DATA) png.h $(DESTDIR)$(includedir)/FL/images
 	$(INSTALL_DATA) pngconf.h $(DESTDIR)$(includedir)/FL/images
 	$(INSTALL_DATA) pnglibconf.h $(DESTDIR)$(includedir)/FL/images
+	$(INSTALL_DATA) pngprefix.h $(DESTDIR)$(includedir)/FL/images
 
 
 #
@@ -72,6 +73,7 @@ uninstall:
 	$(RM) $(DESTDIR)$(includedir)/FL/images/png.h
 	$(RM) $(DESTDIR)$(includedir)/FL/images/pngconf.h
 	$(RM) $(DESTDIR)$(includedir)/FL/images/pnglibconf.h
+	$(RM) $(DESTDIR)$(includedir)/FL/images/pngprefix.h
 
 
 #
diff --git png/pnglibconf.h png/pnglibconf.h
index c78ba4d..bcd530a 100644
--- png/pnglibconf.h
+++ png/pnglibconf.h
@@ -1,5 +1,10 @@
 /*
 ** FLTK specific PNG lib configuration file -- see README.bundled-libs.txt
+**
+** This file must be generated on Linux in a libpng distribution using:
+**   $ ./configure --with-libpng-prefix=fltk_
+**
+** All lines including the 'fltk_' prefix must be upgraded with libpng.
 */
 
 /* pnglibconf.h - library build configuration */
@@ -203,6 +208,7 @@
 #define PNG_LINKAGE_DATA extern
 #define PNG_LINKAGE_FUNCTION extern
 #define PNG_MAX_GAMMA_8 11
+#define PNG_PREFIX fltk_
 #define PNG_QUANTIZE_BLUE_BITS 5
 #define PNG_QUANTIZE_GREEN_BITS 5
 #define PNG_QUANTIZE_RED_BITS 5
@@ -220,4 +226,253 @@
 #define PNG_sCAL_PRECISION 5
 #define PNG_sRGB_PROFILE_CHECKS 2
 /* end of settings */
+#define png_access_version_number fltk_png_access_version_number
+#define png_benign_error fltk_png_benign_error
+#define png_build_grayscale_palette fltk_png_build_grayscale_palette
+#define png_calloc fltk_png_calloc
+#define png_chunk_benign_error fltk_png_chunk_benign_error
+#define png_chunk_error fltk_png_chunk_error
+#define png_chunk_warning fltk_png_chunk_warning
+#define png_convert_from_struct_tm fltk_png_convert_from_struct_tm
+#define png_convert_from_time_t fltk_png_convert_from_time_t
+#define png_convert_to_rfc1123 fltk_png_convert_to_rfc1123
+#define png_convert_to_rfc1123_buffer fltk_png_convert_to_rfc1123_buffer
+#define png_create_info_struct fltk_png_create_info_struct
+#define png_create_read_struct fltk_png_create_read_struct
+#define png_create_read_struct_2 fltk_png_create_read_struct_2
+#define png_create_write_struct fltk_png_create_write_struct
+#define png_create_write_struct_2 fltk_png_create_write_struct_2
+#define png_data_freer fltk_png_data_freer
+#define png_destroy_info_struct fltk_png_destroy_info_struct
+#define png_destroy_read_struct fltk_png_destroy_read_struct
+#define png_destroy_write_struct fltk_png_destroy_write_struct
+#define png_error fltk_png_error
+#define png_free fltk_png_free
+#define png_free_data fltk_png_free_data
+#define png_free_default fltk_png_free_default
+#define png_get_IHDR fltk_png_get_IHDR
+#define png_get_PLTE fltk_png_get_PLTE
+#define png_get_bKGD fltk_png_get_bKGD
+#define png_get_bit_depth fltk_png_get_bit_depth
+#define png_get_cHRM fltk_png_get_cHRM
+#define png_get_cHRM_XYZ fltk_png_get_cHRM_XYZ
+#define png_get_cHRM_XYZ_fixed fltk_png_get_cHRM_XYZ_fixed
+#define png_get_cHRM_fixed fltk_png_get_cHRM_fixed
+#define png_get_channels fltk_png_get_channels
+#define png_get_chunk_cache_max fltk_png_get_chunk_cache_max
+#define png_get_chunk_malloc_max fltk_png_get_chunk_malloc_max
+#define png_get_color_type fltk_png_get_color_type
+#define png_get_compression_buffer_size fltk_png_get_compression_buffer_size
+#define png_get_compression_type fltk_png_get_compression_type
+#define png_get_copyright fltk_png_get_copyright
+#define png_get_current_pass_number fltk_png_get_current_pass_number
+#define png_get_current_row_number fltk_png_get_current_row_number
+#define png_get_eXIf fltk_png_get_eXIf
+#define png_get_eXIf_1 fltk_png_get_eXIf_1
+#define png_get_error_ptr fltk_png_get_error_ptr
+#define png_get_filter_type fltk_png_get_filter_type
+#define png_get_gAMA fltk_png_get_gAMA
+#define png_get_gAMA_fixed fltk_png_get_gAMA_fixed
+#define png_get_hIST fltk_png_get_hIST
+#define png_get_header_ver fltk_png_get_header_ver
+#define png_get_header_version fltk_png_get_header_version
+#define png_get_iCCP fltk_png_get_iCCP
+#define png_get_image_height fltk_png_get_image_height
+#define png_get_image_width fltk_png_get_image_width
+#define png_get_int_32 fltk_png_get_int_32
+#define png_get_interlace_type fltk_png_get_interlace_type
+#define png_get_io_chunk_type fltk_png_get_io_chunk_type
+#define png_get_io_ptr fltk_png_get_io_ptr
+#define png_get_io_state fltk_png_get_io_state
+#define png_get_libpng_ver fltk_png_get_libpng_ver
+#define png_get_mem_ptr fltk_png_get_mem_ptr
+#define png_get_oFFs fltk_png_get_oFFs
+#define png_get_pCAL fltk_png_get_pCAL
+#define png_get_pHYs fltk_png_get_pHYs
+#define png_get_pHYs_dpi fltk_png_get_pHYs_dpi
+#define png_get_palette_max fltk_png_get_palette_max
+#define png_get_pixel_aspect_ratio fltk_png_get_pixel_aspect_ratio
+#define png_get_pixel_aspect_ratio_fixed fltk_png_get_pixel_aspect_ratio_fixed
+#define png_get_pixels_per_inch fltk_png_get_pixels_per_inch
+#define png_get_pixels_per_meter fltk_png_get_pixels_per_meter
+#define png_get_progressive_ptr fltk_png_get_progressive_ptr
+#define png_get_rgb_to_gray_status fltk_png_get_rgb_to_gray_status
+#define png_get_rowbytes fltk_png_get_rowbytes
+#define png_get_rows fltk_png_get_rows
+#define png_get_sBIT fltk_png_get_sBIT
+#define png_get_sCAL fltk_png_get_sCAL
+#define png_get_sCAL_fixed fltk_png_get_sCAL_fixed
+#define png_get_sCAL_s fltk_png_get_sCAL_s
+#define png_get_sPLT fltk_png_get_sPLT
+#define png_get_sRGB fltk_png_get_sRGB
+#define png_get_signature fltk_png_get_signature
+#define png_get_tIME fltk_png_get_tIME
+#define png_get_tRNS fltk_png_get_tRNS
+#define png_get_text fltk_png_get_text
+#define png_get_uint_16 fltk_png_get_uint_16
+#define png_get_uint_31 fltk_png_get_uint_31
+#define png_get_uint_32 fltk_png_get_uint_32
+#define png_get_unknown_chunks fltk_png_get_unknown_chunks
+#define png_get_user_chunk_ptr fltk_png_get_user_chunk_ptr
+#define png_get_user_height_max fltk_png_get_user_height_max
+#define png_get_user_transform_ptr fltk_png_get_user_transform_ptr
+#define png_get_user_width_max fltk_png_get_user_width_max
+#define png_get_valid fltk_png_get_valid
+#define png_get_x_offset_inches fltk_png_get_x_offset_inches
+#define png_get_x_offset_inches_fixed fltk_png_get_x_offset_inches_fixed
+#define png_get_x_offset_microns fltk_png_get_x_offset_microns
+#define png_get_x_offset_pixels fltk_png_get_x_offset_pixels
+#define png_get_x_pixels_per_inch fltk_png_get_x_pixels_per_inch
+#define png_get_x_pixels_per_meter fltk_png_get_x_pixels_per_meter
+#define png_get_y_offset_inches fltk_png_get_y_offset_inches
+#define png_get_y_offset_inches_fixed fltk_png_get_y_offset_inches_fixed
+#define png_get_y_offset_microns fltk_png_get_y_offset_microns
+#define png_get_y_offset_pixels fltk_png_get_y_offset_pixels
+#define png_get_y_pixels_per_inch fltk_png_get_y_pixels_per_inch
+#define png_get_y_pixels_per_meter fltk_png_get_y_pixels_per_meter
+#define png_handle_as_unknown fltk_png_handle_as_unknown
+#define png_image_begin_read_from_file fltk_png_image_begin_read_from_file
+#define png_image_begin_read_from_memory fltk_png_image_begin_read_from_memory
+#define png_image_begin_read_from_stdio fltk_png_image_begin_read_from_stdio
+#define png_image_finish_read fltk_png_image_finish_read
+#define png_image_free fltk_png_image_free
+#define png_image_write_to_file fltk_png_image_write_to_file
+#define png_image_write_to_memory fltk_png_image_write_to_memory
+#define png_image_write_to_stdio fltk_png_image_write_to_stdio
+#define png_info_init_3 fltk_png_info_init_3
+#define png_init_io fltk_png_init_io
+#define png_longjmp fltk_png_longjmp
+#define png_malloc fltk_png_malloc
+#define png_malloc_default fltk_png_malloc_default
+#define png_malloc_warn fltk_png_malloc_warn
+#define png_permit_mng_features fltk_png_permit_mng_features
+#define png_process_data fltk_png_process_data
+#define png_process_data_pause fltk_png_process_data_pause
+#define png_process_data_skip fltk_png_process_data_skip
+#define png_progressive_combine_row fltk_png_progressive_combine_row
+#define png_read_end fltk_png_read_end
+#define png_read_image fltk_png_read_image
+#define png_read_info fltk_png_read_info
+#define png_read_png fltk_png_read_png
+#define png_read_row fltk_png_read_row
+#define png_read_rows fltk_png_read_rows
+#define png_read_update_info fltk_png_read_update_info
+#define png_reset_zstream fltk_png_reset_zstream
+#define png_save_int_32 fltk_png_save_int_32
+#define png_save_uint_16 fltk_png_save_uint_16
+#define png_save_uint_32 fltk_png_save_uint_32
+#define png_set_IHDR fltk_png_set_IHDR
+#define png_set_PLTE fltk_png_set_PLTE
+#define png_set_add_alpha fltk_png_set_add_alpha
+#define png_set_alpha_mode fltk_png_set_alpha_mode
+#define png_set_alpha_mode_fixed fltk_png_set_alpha_mode_fixed
+#define png_set_bKGD fltk_png_set_bKGD
+#define png_set_background fltk_png_set_background
+#define png_set_background_fixed fltk_png_set_background_fixed
+#define png_set_benign_errors fltk_png_set_benign_errors
+#define png_set_bgr fltk_png_set_bgr
+#define png_set_cHRM fltk_png_set_cHRM
+#define png_set_cHRM_XYZ fltk_png_set_cHRM_XYZ
+#define png_set_cHRM_XYZ_fixed fltk_png_set_cHRM_XYZ_fixed
+#define png_set_cHRM_fixed fltk_png_set_cHRM_fixed
+#define png_set_check_for_invalid_index fltk_png_set_check_for_invalid_index
+#define png_set_chunk_cache_max fltk_png_set_chunk_cache_max
+#define png_set_chunk_malloc_max fltk_png_set_chunk_malloc_max
+#define png_set_compression_buffer_size fltk_png_set_compression_buffer_size
+#define png_set_compression_level fltk_png_set_compression_level
+#define png_set_compression_mem_level fltk_png_set_compression_mem_level
+#define png_set_compression_method fltk_png_set_compression_method
+#define png_set_compression_strategy fltk_png_set_compression_strategy
+#define png_set_compression_window_bits fltk_png_set_compression_window_bits
+#define png_set_crc_action fltk_png_set_crc_action
+#define png_set_eXIf fltk_png_set_eXIf
+#define png_set_eXIf_1 fltk_png_set_eXIf_1
+#define png_set_error_fn fltk_png_set_error_fn
+#define png_set_expand fltk_png_set_expand
+#define png_set_expand_16 fltk_png_set_expand_16
+#define png_set_expand_gray_1_2_4_to_8 fltk_png_set_expand_gray_1_2_4_to_8
+#define png_set_filler fltk_png_set_filler
+#define png_set_filter fltk_png_set_filter
+#define png_set_filter_heuristics fltk_png_set_filter_heuristics
+#define png_set_filter_heuristics_fixed fltk_png_set_filter_heuristics_fixed
+#define png_set_flush fltk_png_set_flush
+#define png_set_gAMA fltk_png_set_gAMA
+#define png_set_gAMA_fixed fltk_png_set_gAMA_fixed
+#define png_set_gamma fltk_png_set_gamma
+#define png_set_gamma_fixed fltk_png_set_gamma_fixed
+#define png_set_gray_to_rgb fltk_png_set_gray_to_rgb
+#define png_set_hIST fltk_png_set_hIST
+#define png_set_iCCP fltk_png_set_iCCP
+#define png_set_interlace_handling fltk_png_set_interlace_handling
+#define png_set_invalid fltk_png_set_invalid
+#define png_set_invert_alpha fltk_png_set_invert_alpha
+#define png_set_invert_mono fltk_png_set_invert_mono
+#define png_set_keep_unknown_chunks fltk_png_set_keep_unknown_chunks
+#define png_set_longjmp_fn fltk_png_set_longjmp_fn
+#define png_set_mem_fn fltk_png_set_mem_fn
+#define png_set_oFFs fltk_png_set_oFFs
+#define png_set_option fltk_png_set_option
+#define png_set_pCAL fltk_png_set_pCAL
+#define png_set_pHYs fltk_png_set_pHYs
+#define png_set_packing fltk_png_set_packing
+#define png_set_packswap fltk_png_set_packswap
+#define png_set_palette_to_rgb fltk_png_set_palette_to_rgb
+#define png_set_progressive_read_fn fltk_png_set_progressive_read_fn
+#define png_set_quantize fltk_png_set_quantize
+#define png_set_read_fn fltk_png_set_read_fn
+#define png_set_read_status_fn fltk_png_set_read_status_fn
+#define png_set_read_user_chunk_fn fltk_png_set_read_user_chunk_fn
+#define png_set_read_user_transform_fn fltk_png_set_read_user_transform_fn
+#define png_set_rgb_to_gray fltk_png_set_rgb_to_gray
+#define png_set_rgb_to_gray_fixed fltk_png_set_rgb_to_gray_fixed
+#define png_set_rows fltk_png_set_rows
+#define png_set_sBIT fltk_png_set_sBIT
+#define png_set_sCAL fltk_png_set_sCAL
+#define png_set_sCAL_fixed fltk_png_set_sCAL_fixed
+#define png_set_sCAL_s fltk_png_set_sCAL_s
+#define png_set_sPLT fltk_png_set_sPLT
+#define png_set_sRGB fltk_png_set_sRGB
+#define png_set_sRGB_gAMA_and_cHRM fltk_png_set_sRGB_gAMA_and_cHRM
+#define png_set_scale_16 fltk_png_set_scale_16
+#define png_set_shift fltk_png_set_shift
+#define png_set_sig_bytes fltk_png_set_sig_bytes
+#define png_set_strip_16 fltk_png_set_strip_16
+#define png_set_strip_alpha fltk_png_set_strip_alpha
+#define png_set_swap fltk_png_set_swap
+#define png_set_swap_alpha fltk_png_set_swap_alpha
+#define png_set_tIME fltk_png_set_tIME
+#define png_set_tRNS fltk_png_set_tRNS
+#define png_set_tRNS_to_alpha fltk_png_set_tRNS_to_alpha
+#define png_set_text fltk_png_set_text
+#define png_set_text_compression_level fltk_png_set_text_compression_level
+#define png_set_text_compression_mem_level fltk_png_set_text_compression_mem_level
+#define png_set_text_compression_method fltk_png_set_text_compression_method
+#define png_set_text_compression_strategy fltk_png_set_text_compression_strategy
+#define png_set_text_compression_window_bits fltk_png_set_text_compression_window_bits
+#define png_set_unknown_chunk_location fltk_png_set_unknown_chunk_location
+#define png_set_unknown_chunks fltk_png_set_unknown_chunks
+#define png_set_user_limits fltk_png_set_user_limits
+#define png_set_user_transform_info fltk_png_set_user_transform_info
+#define png_set_write_fn fltk_png_set_write_fn
+#define png_set_write_status_fn fltk_png_set_write_status_fn
+#define png_set_write_user_transform_fn fltk_png_set_write_user_transform_fn
+#define png_sig_cmp fltk_png_sig_cmp
+#define png_start_read_image fltk_png_start_read_image
+#define png_warning fltk_png_warning
+#define png_write_chunk fltk_png_write_chunk
+#define png_write_chunk_data fltk_png_write_chunk_data
+#define png_write_chunk_end fltk_png_write_chunk_end
+#define png_write_chunk_start fltk_png_write_chunk_start
+#define png_write_end fltk_png_write_end
+#define png_write_flush fltk_png_write_flush
+#define png_write_image fltk_png_write_image
+#define png_write_info fltk_png_write_info
+#define png_write_info_before_PLTE fltk_png_write_info_before_PLTE
+#define png_write_png fltk_png_write_png
+#define png_write_row fltk_png_write_row
+#define png_write_rows fltk_png_write_rows
+#define png_write_sig fltk_png_write_sig
+#define fltk_png_get_uint_32(buf) PNG_get_uint_32(buf)
+#define fltk_png_get_uint_16(buf) PNG_get_uint_16(buf)
+#define fltk_png_get_int_32(buf) PNG_get_int_32(buf)
 #endif /* PNGLCONF_H */
diff --git png/pngprefix.h png/pngprefix.h
new file mode 100644
index 0000000..7d69b12
--- /dev/null
+++ png/pngprefix.h
@@ -0,0 +1,166 @@
+/*
+ * FLTK symbol prefixes for libpng
+ * This is a generated file: see README.bundled-libs.txt
+*/
+#define png_sRGB_table fltk_png_sRGB_table
+#define png_sRGB_base fltk_png_sRGB_base
+#define png_sRGB_delta fltk_png_sRGB_delta
+#define png_zstream_error fltk_png_zstream_error
+#define png_free_buffer_list fltk_png_free_buffer_list
+#define png_fixed fltk_png_fixed
+#define png_user_version_check fltk_png_user_version_check
+#define png_malloc_base fltk_png_malloc_base
+#define png_malloc_array fltk_png_malloc_array
+#define png_realloc_array fltk_png_realloc_array
+#define png_create_png_struct fltk_png_create_png_struct
+#define png_destroy_png_struct fltk_png_destroy_png_struct
+#define png_free_jmpbuf fltk_png_free_jmpbuf
+#define png_zalloc fltk_png_zalloc
+#define png_zfree fltk_png_zfree
+#define png_default_read_data fltk_png_default_read_data
+#define png_push_fill_buffer fltk_png_push_fill_buffer
+#define png_default_write_data fltk_png_default_write_data
+#define png_default_flush fltk_png_default_flush
+#define png_reset_crc fltk_png_reset_crc
+#define png_write_data fltk_png_write_data
+#define png_read_sig fltk_png_read_sig
+#define png_read_chunk_header fltk_png_read_chunk_header
+#define png_read_data fltk_png_read_data
+#define png_crc_read fltk_png_crc_read
+#define png_crc_finish fltk_png_crc_finish
+#define png_crc_error fltk_png_crc_error
+#define png_calculate_crc fltk_png_calculate_crc
+#define png_flush fltk_png_flush
+#define png_write_IHDR fltk_png_write_IHDR
+#define png_write_PLTE fltk_png_write_PLTE
+#define png_compress_IDAT fltk_png_compress_IDAT
+#define png_write_IEND fltk_png_write_IEND
+#define png_write_gAMA_fixed fltk_png_write_gAMA_fixed
+#define png_write_sBIT fltk_png_write_sBIT
+#define png_write_cHRM_fixed fltk_png_write_cHRM_fixed
+#define png_write_sRGB fltk_png_write_sRGB
+#define png_write_eXIf fltk_png_write_eXIf
+#define png_write_iCCP fltk_png_write_iCCP
+#define png_write_sPLT fltk_png_write_sPLT
+#define png_write_tRNS fltk_png_write_tRNS
+#define png_write_bKGD fltk_png_write_bKGD
+#define png_write_hIST fltk_png_write_hIST
+#define png_write_tEXt fltk_png_write_tEXt
+#define png_write_zTXt fltk_png_write_zTXt
+#define png_write_iTXt fltk_png_write_iTXt
+#define png_set_text_2 fltk_png_set_text_2
+#define png_write_oFFs fltk_png_write_oFFs
+#define png_write_pCAL fltk_png_write_pCAL
+#define png_write_pHYs fltk_png_write_pHYs
+#define png_write_tIME fltk_png_write_tIME
+#define png_write_sCAL_s fltk_png_write_sCAL_s
+#define png_write_finish_row fltk_png_write_finish_row
+#define png_write_start_row fltk_png_write_start_row
+#define png_combine_row fltk_png_combine_row
+#define png_do_read_interlace fltk_png_do_read_interlace
+#define png_do_write_interlace fltk_png_do_write_interlace
+#define png_read_filter_row fltk_png_read_filter_row
+#define png_write_find_filter fltk_png_write_find_filter
+#define png_read_IDAT_data fltk_png_read_IDAT_data
+#define png_read_finish_IDAT fltk_png_read_finish_IDAT
+#define png_read_finish_row fltk_png_read_finish_row
+#define png_read_start_row fltk_png_read_start_row
+#define png_zlib_inflate fltk_png_zlib_inflate
+#define png_read_transform_info fltk_png_read_transform_info
+#define png_do_strip_channel fltk_png_do_strip_channel
+#define png_do_swap fltk_png_do_swap
+#define png_do_packswap fltk_png_do_packswap
+#define png_do_invert fltk_png_do_invert
+#define png_do_bgr fltk_png_do_bgr
+#define png_handle_IHDR fltk_png_handle_IHDR
+#define png_handle_PLTE fltk_png_handle_PLTE
+#define png_handle_IEND fltk_png_handle_IEND
+#define png_handle_bKGD fltk_png_handle_bKGD
+#define png_handle_cHRM fltk_png_handle_cHRM
+#define png_handle_eXIf fltk_png_handle_eXIf
+#define png_handle_gAMA fltk_png_handle_gAMA
+#define png_handle_hIST fltk_png_handle_hIST
+#define png_handle_iCCP fltk_png_handle_iCCP
+#define png_handle_iTXt fltk_png_handle_iTXt
+#define png_handle_oFFs fltk_png_handle_oFFs
+#define png_handle_pCAL fltk_png_handle_pCAL
+#define png_handle_pHYs fltk_png_handle_pHYs
+#define png_handle_sBIT fltk_png_handle_sBIT
+#define png_handle_sCAL fltk_png_handle_sCAL
+#define png_handle_sPLT fltk_png_handle_sPLT
+#define png_handle_sRGB fltk_png_handle_sRGB
+#define png_handle_tEXt fltk_png_handle_tEXt
+#define png_handle_tIME fltk_png_handle_tIME
+#define png_handle_tRNS fltk_png_handle_tRNS
+#define png_handle_zTXt fltk_png_handle_zTXt
+#define png_check_chunk_name fltk_png_check_chunk_name
+#define png_check_chunk_length fltk_png_check_chunk_length
+#define png_handle_unknown fltk_png_handle_unknown
+#define png_chunk_unknown_handling fltk_png_chunk_unknown_handling
+#define png_do_read_transformations fltk_png_do_read_transformations
+#define png_do_write_transformations fltk_png_do_write_transformations
+#define png_init_read_transformations fltk_png_init_read_transformations
+#define png_push_read_chunk fltk_png_push_read_chunk
+#define png_push_read_sig fltk_png_push_read_sig
+#define png_push_check_crc fltk_png_push_check_crc
+#define png_push_save_buffer fltk_png_push_save_buffer
+#define png_push_restore_buffer fltk_png_push_restore_buffer
+#define png_push_read_IDAT fltk_png_push_read_IDAT
+#define png_process_IDAT_data fltk_png_process_IDAT_data
+#define png_push_process_row fltk_png_push_process_row
+#define png_push_handle_unknown fltk_png_push_handle_unknown
+#define png_push_have_info fltk_png_push_have_info
+#define png_push_have_end fltk_png_push_have_end
+#define png_push_have_row fltk_png_push_have_row
+#define png_push_read_end fltk_png_push_read_end
+#define png_process_some_data fltk_png_process_some_data
+#define png_read_push_finish_row fltk_png_read_push_finish_row
+#define png_push_handle_tEXt fltk_png_push_handle_tEXt
+#define png_push_read_tEXt fltk_png_push_read_tEXt
+#define png_push_handle_zTXt fltk_png_push_handle_zTXt
+#define png_push_read_zTXt fltk_png_push_read_zTXt
+#define png_push_handle_iTXt fltk_png_push_handle_iTXt
+#define png_push_read_iTXt fltk_png_push_read_iTXt
+#define png_colorspace_set_gamma fltk_png_colorspace_set_gamma
+#define png_colorspace_sync_info fltk_png_colorspace_sync_info
+#define png_colorspace_sync fltk_png_colorspace_sync
+#define png_colorspace_set_chromaticities fltk_png_colorspace_set_chromaticities
+#define png_colorspace_set_endpoints fltk_png_colorspace_set_endpoints
+#define png_colorspace_set_sRGB fltk_png_colorspace_set_sRGB
+#define png_colorspace_set_ICC fltk_png_colorspace_set_ICC
+#define png_icc_check_length fltk_png_icc_check_length
+#define png_icc_check_header fltk_png_icc_check_header
+#define png_icc_check_tag_table fltk_png_icc_check_tag_table
+#define png_icc_set_sRGB fltk_png_icc_set_sRGB
+#define png_colorspace_set_rgb_coefficients fltk_png_colorspace_set_rgb_coefficients
+#define png_check_IHDR fltk_png_check_IHDR
+#define png_do_check_palette_indexes fltk_png_do_check_palette_indexes
+#define png_fixed_error fltk_png_fixed_error
+#define png_safecat fltk_png_safecat
+#define png_format_number fltk_png_format_number
+#define png_warning_parameter fltk_png_warning_parameter
+#define png_warning_parameter_unsigned fltk_png_warning_parameter_unsigned
+#define png_warning_parameter_signed fltk_png_warning_parameter_signed
+#define png_formatted_warning fltk_png_formatted_warning
+#define png_app_warning fltk_png_app_warning
+#define png_app_error fltk_png_app_error
+#define png_chunk_report fltk_png_chunk_report
+#define png_ascii_from_fp fltk_png_ascii_from_fp
+#define png_ascii_from_fixed fltk_png_ascii_from_fixed
+#define png_check_fp_number fltk_png_check_fp_number
+#define png_check_fp_string fltk_png_check_fp_string
+#define png_muldiv fltk_png_muldiv
+#define png_muldiv_warn fltk_png_muldiv_warn
+#define png_reciprocal fltk_png_reciprocal
+#define png_reciprocal2 fltk_png_reciprocal2
+#define png_gamma_significant fltk_png_gamma_significant
+#define png_gamma_correct fltk_png_gamma_correct
+#define png_gamma_16bit_correct fltk_png_gamma_16bit_correct
+#define png_gamma_8bit_correct fltk_png_gamma_8bit_correct
+#define png_destroy_gamma_table fltk_png_destroy_gamma_table
+#define png_build_gamma_table fltk_png_build_gamma_table
+#define png_safe_error fltk_png_safe_error
+#define png_safe_warning fltk_png_safe_warning
+#define png_safe_execute fltk_png_safe_execute
+#define png_image_error fltk_png_image_error
+#define png_check_keyword fltk_png_check_keyword
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