kc3-lang/libjpeg-turbo/src/jsamplecomp.h
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Hash : 3290711d
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Date : 2024-06-22T17:45:31
cjpeg: Only support 8-bit precision w/ GIF input Creating 12-bit-per-sample JPEG images from GIF input images was a useful testing feature when the data precision was a compile-time setting. However, now that the data precision is a runtime setting, it doesn't make sense for cjpeg to allow data precisions other than 8-bit with GIF input images. GIF images are limited to 256 colors from a palette of 8-bit-per-component RGB values, so they cannot take advantage of the additional gamut afforded by higher data precisions.
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src/jsamplecomp.h
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/* * 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_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_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_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 */