kc3-lang/libjpeg-turbo/jsamplecomp.h

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• Hash : bf9f319c
  Author :
  Date : 2023-06-29T16:07:42
  

  Disallow color quantization with lossless decomp
  
  Color quantization is a legacy feature that serves little or no purpose
  with lossless JPEG images.  9f756bc67a84d4566bf74a0c2432aa55da404021
  eliminated interaction issues between the lossless decompressor and the
  color quantizers related to out-of-range 12-bit samples, but referring
  to #701, other interaction issues apparently still exist.  Such issues
  are likely, given the fact that the color quantizers were not designed
  with lossless decompression in mind.
  
  This commit reverts 9f756bc67a84d4566bf74a0c2432aa55da404021, since the
  issues it fixed are no longer relevant because of this commit and
  2192560d74e6e6cf99dd05928885573be00a8208.
  
  Fixed #672
  Fixes #673
  Fixes #674
  Fixes #676
  Fixes #677
  Fixes #678
  Fixes #679
  Fixes #681
  Fixes #683
  Fixes #701
  

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• jsamplecomp.h

• /*
   * jsamplecomp.h
   *
   * Copyright (C) 2022, D. R. Commander.
   * For conditions of distribution and use, see the accompanying README.ijg
   * file.
   */
  
  /* In source files that must be compiled for multiple data precisions, we
   * prefix all precision-dependent data types, macros, methods, fields, and
   * function names with an underscore.  Including this file replaces those
   * precision-independent tokens with their precision-dependent equivalents,
   * based on the value of BITS_IN_JSAMPLE.
   */
  
  #ifndef JSAMPLECOMP_H
  #define JSAMPLECOMP_H
  
  #if BITS_IN_JSAMPLE == 16
  
  /* Sample data types and macros (jmorecfg.h) */
  #define _JSAMPLE  J16SAMPLE
  
  #define _MAXJSAMPLE  MAXJ16SAMPLE
  #define _CENTERJSAMPLE   CENTERJ16SAMPLE
  
  #define _JSAMPROW  J16SAMPROW
  #define _JSAMPARRAY  J16SAMPARRAY
  #define _JSAMPIMAGE  J16SAMPIMAGE
  
  /* External functions (jpeglib.h) */
  #define _jpeg_write_scanlines  jpeg16_write_scanlines
  #define _jpeg_read_scanlines  jpeg16_read_scanlines
  
  /* Internal methods (jpegint.h) */
  
  #ifdef C_LOSSLESS_SUPPORTED
  /* Use the 16-bit method in the jpeg_c_main_controller structure. */
  #define _process_data  process_data_16
  /* Use the 16-bit method in the jpeg_c_prep_controller structure. */
  #define _pre_process_data  pre_process_data_16
  /* Use the 16-bit method in the jpeg_c_coef_controller structure. */
  #define _compress_data  compress_data_16
  /* Use the 16-bit method in the jpeg_color_converter structure. */
  #define _color_convert  color_convert_16
  /* Use the 16-bit method in the jpeg_downsampler structure. */
  #define _downsample  downsample_16
  #endif
  #ifdef D_LOSSLESS_SUPPORTED
  /* Use the 16-bit method in the jpeg_d_main_controller structure. */
  #define _process_data  process_data_16
  /* Use the 16-bit method in the jpeg_d_coef_controller structure. */
  #define _decompress_data  decompress_data_16
  /* Use the 16-bit method in the jpeg_d_post_controller structure. */
  #define _post_process_data  post_process_data_16
  /* Use the 16-bit method in the jpeg_upsampler structure. */
  #define _upsample  upsample_16
  /* Use the 16-bit method in the jpeg_color_converter structure. */
  #define _color_convert  color_convert_16
  #endif
  
  /* Global internal functions (jpegint.h) */
  #ifdef C_LOSSLESS_SUPPORTED
  #define _jinit_c_main_controller  j16init_c_main_controller
  #define _jinit_c_prep_controller  j16init_c_prep_controller
  #define _jinit_color_converter  j16init_color_converter
  #define _jinit_downsampler  j16init_downsampler
  #define _jinit_c_diff_controller  j16init_c_diff_controller
  #define _jinit_lossless_compressor  j16init_lossless_compressor
  #endif
  
  #ifdef D_LOSSLESS_SUPPORTED
  #define _jinit_d_main_controller  j16init_d_main_controller
  #define _jinit_d_post_controller  j16init_d_post_controller
  #define _jinit_upsampler  j16init_upsampler
  #define _jinit_color_deconverter  j16init_color_deconverter
  #define _jinit_merged_upsampler  j16init_merged_upsampler
  #define _jinit_d_diff_controller  j16init_d_diff_controller
  #define _jinit_lossless_decompressor  j16init_lossless_decompressor
  #endif
  
  #if defined(C_LOSSLESS_SUPPORTED) || defined(D_LOSSLESS_SUPPORTED)
  #define _jcopy_sample_rows  j16copy_sample_rows
  #endif
  
  /* Internal fields (cdjpeg.h) */
  
  #if defined(C_LOSSLESS_SUPPORTED) || defined(D_LOSSLESS_SUPPORTED)
  /* Use the 16-bit buffer in the cjpeg_source_struct and djpeg_dest_struct
     structures. */
  #define _buffer  buffer16
  #endif
  
  /* Image I/O functions (cdjpeg.h) */
  #ifdef C_LOSSLESS_SUPPORTED
  #define _jinit_read_gif  j16init_read_gif
  #define _jinit_read_ppm  j16init_read_ppm
  #endif
  
  #ifdef D_LOSSLESS_SUPPORTED
  #define _jinit_write_ppm  j16init_write_ppm
  #endif
  
  #elif BITS_IN_JSAMPLE == 12
  
  /* Sample data types and macros (jmorecfg.h) */
  #define _JSAMPLE  J12SAMPLE
  
  #define _MAXJSAMPLE  MAXJ12SAMPLE
  #define _CENTERJSAMPLE   CENTERJ12SAMPLE
  
  #define _JSAMPROW  J12SAMPROW
  #define _JSAMPARRAY  J12SAMPARRAY
  #define _JSAMPIMAGE  J12SAMPIMAGE
  
  /* External functions (jpeglib.h) */
  #define _jpeg_write_scanlines  jpeg12_write_scanlines
  #define _jpeg_write_raw_data  jpeg12_write_raw_data
  #define _jpeg_read_scanlines  jpeg12_read_scanlines
  #define _jpeg_skip_scanlines  jpeg12_skip_scanlines
  #define _jpeg_crop_scanline  jpeg12_crop_scanline
  #define _jpeg_read_raw_data  jpeg12_read_raw_data
  
  /* Internal methods (jpegint.h) */
  
  /* Use the 12-bit method in the jpeg_c_main_controller structure. */
  #define _process_data  process_data_12
  /* Use the 12-bit method in the jpeg_c_prep_controller structure. */
  #define _pre_process_data  pre_process_data_12
  /* Use the 12-bit method in the jpeg_c_coef_controller structure. */
  #define _compress_data  compress_data_12
  /* Use the 12-bit method in the jpeg_color_converter structure. */
  #define _color_convert  color_convert_12
  /* Use the 12-bit method in the jpeg_downsampler structure. */
  #define _downsample  downsample_12
  /* Use the 12-bit method in the jpeg_forward_dct structure. */
  #define _forward_DCT  forward_DCT_12
  /* Use the 12-bit method in the jpeg_d_main_controller structure. */
  #define _process_data  process_data_12
  /* Use the 12-bit method in the jpeg_d_coef_controller structure. */
  #define _decompress_data  decompress_data_12
  /* Use the 12-bit method in the jpeg_d_post_controller structure. */
  #define _post_process_data  post_process_data_12
  /* Use the 12-bit method in the jpeg_inverse_dct structure. */
  #define _inverse_DCT_method_ptr  inverse_DCT_12_method_ptr
  #define _inverse_DCT  inverse_DCT_12
  /* Use the 12-bit method in the jpeg_upsampler structure. */
  #define _upsample  upsample_12
  /* Use the 12-bit method in the jpeg_color_converter structure. */
  #define _color_convert  color_convert_12
  /* Use the 12-bit method in the jpeg_color_quantizer structure. */
  #define _color_quantize  color_quantize_12
  
  /* Global internal functions (jpegint.h) */
  #define _jinit_c_main_controller  j12init_c_main_controller
  #define _jinit_c_prep_controller  j12init_c_prep_controller
  #define _jinit_c_coef_controller  j12init_c_coef_controller
  #define _jinit_color_converter  j12init_color_converter
  #define _jinit_downsampler  j12init_downsampler
  #define _jinit_forward_dct  j12init_forward_dct
  #ifdef C_LOSSLESS_SUPPORTED
  #define _jinit_c_diff_controller  j12init_c_diff_controller
  #define _jinit_lossless_compressor  j12init_lossless_compressor
  #endif
  
  #define _jinit_d_main_controller  j12init_d_main_controller
  #define _jinit_d_coef_controller  j12init_d_coef_controller
  #define _jinit_d_post_controller  j12init_d_post_controller
  #define _jinit_inverse_dct  j12init_inverse_dct
  #define _jinit_upsampler  j12init_upsampler
  #define _jinit_color_deconverter  j12init_color_deconverter
  #define _jinit_1pass_quantizer  j12init_1pass_quantizer
  #define _jinit_2pass_quantizer  j12init_2pass_quantizer
  #define _jinit_merged_upsampler  j12init_merged_upsampler
  #ifdef D_LOSSLESS_SUPPORTED
  #define _jinit_d_diff_controller  j12init_d_diff_controller
  #define _jinit_lossless_decompressor  j12init_lossless_decompressor
  #endif
  
  #define _jcopy_sample_rows  j12copy_sample_rows
  
  /* Global internal functions (jdct.h) */
  #define _jpeg_fdct_islow  jpeg12_fdct_islow
  #define _jpeg_fdct_ifast  jpeg12_fdct_ifast
  
  #define _jpeg_idct_islow  jpeg12_idct_islow
  #define _jpeg_idct_ifast  jpeg12_idct_ifast
  #define _jpeg_idct_float  jpeg12_idct_float
  #define _jpeg_idct_7x7  jpeg12_idct_7x7
  #define _jpeg_idct_6x6  jpeg12_idct_6x6
  #define _jpeg_idct_5x5  jpeg12_idct_5x5
  #define _jpeg_idct_4x4  jpeg12_idct_4x4
  #define _jpeg_idct_3x3  jpeg12_idct_3x3
  #define _jpeg_idct_2x2  jpeg12_idct_2x2
  #define _jpeg_idct_1x1  jpeg12_idct_1x1
  #define _jpeg_idct_9x9  jpeg12_idct_9x9
  #define _jpeg_idct_10x10  jpeg12_idct_10x10
  #define _jpeg_idct_11x11  jpeg12_idct_11x11
  #define _jpeg_idct_12x12  jpeg12_idct_12x12
  #define _jpeg_idct_13x13  jpeg12_idct_13x13
  #define _jpeg_idct_14x14  jpeg12_idct_14x14
  #define _jpeg_idct_15x15  jpeg12_idct_15x15
  #define _jpeg_idct_16x16  jpeg12_idct_16x16
  
  /* Internal fields (cdjpeg.h) */
  
  /* Use the 12-bit buffer in the cjpeg_source_struct and djpeg_dest_struct
     structures. */
  #define _buffer  buffer12
  
  /* Image I/O functions (cdjpeg.h) */
  #define _jinit_read_gif  j12init_read_gif
  #define _jinit_write_gif  j12init_write_gif
  #define _jinit_read_ppm  j12init_read_ppm
  #define _jinit_write_ppm  j12init_write_ppm
  
  #define _read_color_map  read_color_map_12
  
  #else /* BITS_IN_JSAMPLE */
  
  /* Sample data types and macros (jmorecfg.h) */
  #define _JSAMPLE  JSAMPLE
  
  #define _MAXJSAMPLE  MAXJSAMPLE
  #define _CENTERJSAMPLE   CENTERJSAMPLE
  
  #define _JSAMPROW  JSAMPROW
  #define _JSAMPARRAY  JSAMPARRAY
  #define _JSAMPIMAGE  JSAMPIMAGE
  
  /* External functions (jpeglib.h) */
  #define _jpeg_write_scanlines  jpeg_write_scanlines
  #define _jpeg_write_raw_data  jpeg_write_raw_data
  #define _jpeg_read_scanlines  jpeg_read_scanlines
  #define _jpeg_skip_scanlines  jpeg_skip_scanlines
  #define _jpeg_crop_scanline  jpeg_crop_scanline
  #define _jpeg_read_raw_data  jpeg_read_raw_data
  
  /* Internal methods (jpegint.h) */
  
  /* Use the 8-bit method in the jpeg_c_main_controller structure. */
  #define _process_data  process_data
  /* Use the 8-bit method in the jpeg_c_prep_controller structure. */
  #define _pre_process_data  pre_process_data
  /* Use the 8-bit method in the jpeg_c_coef_controller structure. */
  #define _compress_data  compress_data
  /* Use the 8-bit method in the jpeg_color_converter structure. */
  #define _color_convert  color_convert
  /* Use the 8-bit method in the jpeg_downsampler structure. */
  #define _downsample  downsample
  /* Use the 8-bit method in the jpeg_forward_dct structure. */
  #define _forward_DCT  forward_DCT
  /* Use the 8-bit method in the jpeg_d_main_controller structure. */
  #define _process_data  process_data
  /* Use the 8-bit method in the jpeg_d_coef_controller structure. */
  #define _decompress_data  decompress_data
  /* Use the 8-bit method in the jpeg_d_post_controller structure. */
  #define _post_process_data  post_process_data
  /* Use the 8-bit method in the jpeg_inverse_dct structure. */
  #define _inverse_DCT_method_ptr  inverse_DCT_method_ptr
  #define _inverse_DCT  inverse_DCT
  /* Use the 8-bit method in the jpeg_upsampler structure. */
  #define _upsample  upsample
  /* Use the 8-bit method in the jpeg_color_converter structure. */
  #define _color_convert  color_convert
  /* Use the 8-bit method in the jpeg_color_quantizer structure. */
  #define _color_quantize  color_quantize
  
  /* Global internal functions (jpegint.h) */
  #define _jinit_c_main_controller  jinit_c_main_controller
  #define _jinit_c_prep_controller  jinit_c_prep_controller
  #define _jinit_c_coef_controller  jinit_c_coef_controller
  #define _jinit_color_converter  jinit_color_converter
  #define _jinit_downsampler  jinit_downsampler
  #define _jinit_forward_dct  jinit_forward_dct
  #ifdef C_LOSSLESS_SUPPORTED
  #define _jinit_c_diff_controller  jinit_c_diff_controller
  #define _jinit_lossless_compressor  jinit_lossless_compressor
  #endif
  
  #define _jinit_d_main_controller  jinit_d_main_controller
  #define _jinit_d_coef_controller  jinit_d_coef_controller
  #define _jinit_d_post_controller  jinit_d_post_controller
  #define _jinit_inverse_dct  jinit_inverse_dct
  #define _jinit_upsampler  jinit_upsampler
  #define _jinit_color_deconverter  jinit_color_deconverter
  #define _jinit_1pass_quantizer  jinit_1pass_quantizer
  #define _jinit_2pass_quantizer  jinit_2pass_quantizer
  #define _jinit_merged_upsampler  jinit_merged_upsampler
  #ifdef D_LOSSLESS_SUPPORTED
  #define _jinit_d_diff_controller  jinit_d_diff_controller
  #define _jinit_lossless_decompressor  jinit_lossless_decompressor
  #endif
  
  #define _jcopy_sample_rows  jcopy_sample_rows
  
  /* Global internal functions (jdct.h) */
  #define _jpeg_fdct_islow  jpeg_fdct_islow
  #define _jpeg_fdct_ifast  jpeg_fdct_ifast
  
  #define _jpeg_idct_islow  jpeg_idct_islow
  #define _jpeg_idct_ifast  jpeg_idct_ifast
  #define _jpeg_idct_float  jpeg_idct_float
  #define _jpeg_idct_7x7  jpeg_idct_7x7
  #define _jpeg_idct_6x6  jpeg_idct_6x6
  #define _jpeg_idct_5x5  jpeg_idct_5x5
  #define _jpeg_idct_4x4  jpeg_idct_4x4
  #define _jpeg_idct_3x3  jpeg_idct_3x3
  #define _jpeg_idct_2x2  jpeg_idct_2x2
  #define _jpeg_idct_1x1  jpeg_idct_1x1
  #define _jpeg_idct_9x9  jpeg_idct_9x9
  #define _jpeg_idct_10x10  jpeg_idct_10x10
  #define _jpeg_idct_11x11  jpeg_idct_11x11
  #define _jpeg_idct_12x12  jpeg_idct_12x12
  #define _jpeg_idct_13x13  jpeg_idct_13x13
  #define _jpeg_idct_14x14  jpeg_idct_14x14
  #define _jpeg_idct_15x15  jpeg_idct_15x15
  #define _jpeg_idct_16x16  jpeg_idct_16x16
  
  /* Internal fields (cdjpeg.h) */
  
  /* Use the 8-bit buffer in the cjpeg_source_struct and djpeg_dest_struct
     structures. */
  #define _buffer  buffer
  
  /* Image I/O functions (cdjpeg.h) */
  #define _jinit_read_gif  jinit_read_gif
  #define _jinit_write_gif  jinit_write_gif
  #define _jinit_read_ppm  jinit_read_ppm
  #define _jinit_write_ppm  jinit_write_ppm
  
  #define _read_color_map  read_color_map
  
  #endif /* BITS_IN_JSAMPLE */
  
  #endif /* JSAMPLECOMP_H */
  

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