diff options
Diffstat (limited to '3rdparty/libjpeg/jcparam.c')
-rw-r--r-- | 3rdparty/libjpeg/jcparam.c | 115 |
1 files changed, 79 insertions, 36 deletions
diff --git a/3rdparty/libjpeg/jcparam.c b/3rdparty/libjpeg/jcparam.c index c5e85dda550..4b2bee24976 100644 --- a/3rdparty/libjpeg/jcparam.c +++ b/3rdparty/libjpeg/jcparam.c @@ -2,7 +2,7 @@ * jcparam.c * * Copyright (C) 1991-1998, Thomas G. Lane. - * Modified 2003-2008 by Guido Vollbeding. + * Modified 2003-2013 by Guido Vollbeding. * This file is part of the Independent JPEG Group's software. * For conditions of distribution and use, see the accompanying README file. * @@ -150,7 +150,7 @@ jpeg_set_quality (j_compress_ptr cinfo, int quality, boolean force_baseline) /* Set or change the 'quality' (quantization) setting, using default tables. * This is the standard quality-adjusting entry point for typical user * interfaces; only those who want detailed control over quantization tables - * would use the preceding three routines directly. + * would use the preceding routines directly. */ { /* Convert user 0-100 rating to percentage scaling */ @@ -323,18 +323,17 @@ jpeg_set_defaults (j_compress_ptr cinfo) /* Expect normal source image, not raw downsampled data */ cinfo->raw_data_in = FALSE; - /* Use Huffman coding, not arithmetic coding, by default */ - cinfo->arith_code = FALSE; + /* The standard Huffman tables are only valid for 8-bit data precision. + * If the precision is higher, use arithmetic coding. + * (Alternatively, using Huffman coding would be possible with forcing + * optimization on so that usable tables will be computed, or by + * supplying default tables that are valid for the desired precision.) + * Otherwise, use Huffman coding by default. + */ + cinfo->arith_code = cinfo->data_precision > 8 ? TRUE : FALSE; /* By default, don't do extra passes to optimize entropy coding */ cinfo->optimize_coding = FALSE; - /* The standard Huffman tables are only valid for 8-bit data precision. - * If the precision is higher, force optimization on so that usable - * tables will be computed. This test can be removed if default tables - * are supplied that are valid for the desired precision. - */ - if (cinfo->data_precision > 8) - cinfo->optimize_coding = TRUE; /* By default, use the simpler non-cosited sampling alignment */ cinfo->CCIR601_sampling = FALSE; @@ -360,6 +359,9 @@ jpeg_set_defaults (j_compress_ptr cinfo) * JFIF_minor_version to 2. We could probably get away with just defaulting * to 1.02, but there may still be some decoders in use that will complain * about that; saying 1.01 should minimize compatibility problems. + * + * For wide gamut colorspaces (BG_RGB and BG_YCC), the major version will be + * overridden by jpeg_set_colorspace and set to 2. */ cinfo->JFIF_major_version = 1; /* Default JFIF version = 1.01 */ cinfo->JFIF_minor_version = 1; @@ -367,6 +369,9 @@ jpeg_set_defaults (j_compress_ptr cinfo) cinfo->X_density = 1; /* Pixel aspect ratio is square by default */ cinfo->Y_density = 1; + /* No color transform */ + cinfo->color_transform = JCT_NONE; + /* Choose JPEG colorspace based on input space, set defaults accordingly */ jpeg_default_colorspace(cinfo); @@ -381,6 +386,9 @@ GLOBAL(void) jpeg_default_colorspace (j_compress_ptr cinfo) { switch (cinfo->in_color_space) { + case JCS_UNKNOWN: + jpeg_set_colorspace(cinfo, JCS_UNKNOWN); + break; case JCS_GRAYSCALE: jpeg_set_colorspace(cinfo, JCS_GRAYSCALE); break; @@ -396,8 +404,12 @@ jpeg_default_colorspace (j_compress_ptr cinfo) case JCS_YCCK: jpeg_set_colorspace(cinfo, JCS_YCCK); break; - case JCS_UNKNOWN: - jpeg_set_colorspace(cinfo, JCS_UNKNOWN); + case JCS_BG_RGB: + /* No translation for now -- conversion to BG_YCC not yet supportet */ + jpeg_set_colorspace(cinfo, JCS_BG_RGB); + break; + case JCS_BG_YCC: + jpeg_set_colorspace(cinfo, JCS_BG_YCC); break; default: ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE); @@ -438,27 +450,40 @@ jpeg_set_colorspace (j_compress_ptr cinfo, J_COLOR_SPACE colorspace) cinfo->write_Adobe_marker = FALSE; /* write no Adobe marker by default */ switch (colorspace) { + case JCS_UNKNOWN: + cinfo->num_components = cinfo->input_components; + if (cinfo->num_components < 1 || cinfo->num_components > MAX_COMPONENTS) + ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->num_components, + MAX_COMPONENTS); + for (ci = 0; ci < cinfo->num_components; ci++) { + SET_COMP(ci, ci, 1,1, 0, 0,0); + } + break; case JCS_GRAYSCALE: cinfo->write_JFIF_header = TRUE; /* Write a JFIF marker */ cinfo->num_components = 1; /* JFIF specifies component ID 1 */ - SET_COMP(0, 1, 1,1, 0, 0,0); + SET_COMP(0, 0x01, 1,1, 0, 0,0); break; case JCS_RGB: cinfo->write_Adobe_marker = TRUE; /* write Adobe marker to flag RGB */ cinfo->num_components = 3; - SET_COMP(0, 0x52 /* 'R' */, 1,1, 0, 0,0); + SET_COMP(0, 0x52 /* 'R' */, 1,1, 0, + cinfo->color_transform == JCT_SUBTRACT_GREEN ? 1 : 0, + cinfo->color_transform == JCT_SUBTRACT_GREEN ? 1 : 0); SET_COMP(1, 0x47 /* 'G' */, 1,1, 0, 0,0); - SET_COMP(2, 0x42 /* 'B' */, 1,1, 0, 0,0); + SET_COMP(2, 0x42 /* 'B' */, 1,1, 0, + cinfo->color_transform == JCT_SUBTRACT_GREEN ? 1 : 0, + cinfo->color_transform == JCT_SUBTRACT_GREEN ? 1 : 0); break; case JCS_YCbCr: cinfo->write_JFIF_header = TRUE; /* Write a JFIF marker */ cinfo->num_components = 3; /* JFIF specifies component IDs 1,2,3 */ /* We default to 2x2 subsamples of chrominance */ - SET_COMP(0, 1, 2,2, 0, 0,0); - SET_COMP(1, 2, 1,1, 1, 1,1); - SET_COMP(2, 3, 1,1, 1, 1,1); + SET_COMP(0, 0x01, 2,2, 0, 0,0); + SET_COMP(1, 0x02, 1,1, 1, 1,1); + SET_COMP(2, 0x03, 1,1, 1, 1,1); break; case JCS_CMYK: cinfo->write_Adobe_marker = TRUE; /* write Adobe marker to flag CMYK */ @@ -471,19 +496,33 @@ jpeg_set_colorspace (j_compress_ptr cinfo, J_COLOR_SPACE colorspace) case JCS_YCCK: cinfo->write_Adobe_marker = TRUE; /* write Adobe marker to flag YCCK */ cinfo->num_components = 4; - SET_COMP(0, 1, 2,2, 0, 0,0); - SET_COMP(1, 2, 1,1, 1, 1,1); - SET_COMP(2, 3, 1,1, 1, 1,1); - SET_COMP(3, 4, 2,2, 0, 0,0); + SET_COMP(0, 0x01, 2,2, 0, 0,0); + SET_COMP(1, 0x02, 1,1, 1, 1,1); + SET_COMP(2, 0x03, 1,1, 1, 1,1); + SET_COMP(3, 0x04, 2,2, 0, 0,0); break; - case JCS_UNKNOWN: - cinfo->num_components = cinfo->input_components; - if (cinfo->num_components < 1 || cinfo->num_components > MAX_COMPONENTS) - ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->num_components, - MAX_COMPONENTS); - for (ci = 0; ci < cinfo->num_components; ci++) { - SET_COMP(ci, ci, 1,1, 0, 0,0); - } + case JCS_BG_RGB: + cinfo->write_JFIF_header = TRUE; /* Write a JFIF marker */ + cinfo->JFIF_major_version = 2; /* Set JFIF major version = 2 */ + cinfo->num_components = 3; + /* Add offset 0x20 to the normal R/G/B component IDs */ + SET_COMP(0, 0x72 /* 'r' */, 1,1, 0, + cinfo->color_transform == JCT_SUBTRACT_GREEN ? 1 : 0, + cinfo->color_transform == JCT_SUBTRACT_GREEN ? 1 : 0); + SET_COMP(1, 0x67 /* 'g' */, 1,1, 0, 0,0); + SET_COMP(2, 0x62 /* 'b' */, 1,1, 0, + cinfo->color_transform == JCT_SUBTRACT_GREEN ? 1 : 0, + cinfo->color_transform == JCT_SUBTRACT_GREEN ? 1 : 0); + break; + case JCS_BG_YCC: + cinfo->write_JFIF_header = TRUE; /* Write a JFIF marker */ + cinfo->JFIF_major_version = 2; /* Set JFIF major version = 2 */ + cinfo->num_components = 3; + /* Add offset 0x20 to the normal Cb/Cr component IDs */ + /* We default to 2x2 subsamples of chrominance */ + SET_COMP(0, 0x01, 2,2, 0, 0,0); + SET_COMP(1, 0x22, 1,1, 1, 1,1); + SET_COMP(2, 0x23, 1,1, 1, 1,1); break; default: ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); @@ -567,8 +606,10 @@ jpeg_simple_progression (j_compress_ptr cinfo) ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state); /* Figure space needed for script. Calculation must match code below! */ - if (ncomps == 3 && cinfo->jpeg_color_space == JCS_YCbCr) { - /* Custom script for YCbCr color images. */ + if (ncomps == 3 && + (cinfo->jpeg_color_space == JCS_YCbCr || + cinfo->jpeg_color_space == JCS_BG_YCC)) { + /* Custom script for YCC color images. */ nscans = 10; } else { /* All-purpose script for other color spaces. */ @@ -583,7 +624,7 @@ jpeg_simple_progression (j_compress_ptr cinfo) * multiple compressions without changing the settings. To avoid a memory * leak if jpeg_simple_progression is called repeatedly for the same JPEG * object, we try to re-use previously allocated space, and we allocate - * enough space to handle YCbCr even if initially asked for grayscale. + * enough space to handle YCC even if initially asked for grayscale. */ if (cinfo->script_space == NULL || cinfo->script_space_size < nscans) { cinfo->script_space_size = MAX(nscans, 10); @@ -595,8 +636,10 @@ jpeg_simple_progression (j_compress_ptr cinfo) cinfo->scan_info = scanptr; cinfo->num_scans = nscans; - if (ncomps == 3 && cinfo->jpeg_color_space == JCS_YCbCr) { - /* Custom script for YCbCr color images. */ + if (ncomps == 3 && + (cinfo->jpeg_color_space == JCS_YCbCr || + cinfo->jpeg_color_space == JCS_BG_YCC)) { + /* Custom script for YCC color images. */ /* Initial DC scan */ scanptr = fill_dc_scans(scanptr, ncomps, 0, 1); /* Initial AC scan: get some luma data out in a hurry */ |