/*

 * jccolor.c

 *

 * This file was part of the Independent JPEG Group's software:

 * Copyright (C) 1991-1996, Thomas G. Lane.

 * libjpeg-turbo Modifications:

 * Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB

 * Copyright (C) 2009-2012, 2015, 2022, D. R. Commander.

 * Copyright (C) 2014, MIPS Technologies, Inc., California.

 * For conditions of distribution and use, see the accompanying README.ijg

 * file.

 *

 * This file contains input colorspace conversion routines.

 */

#define JPEG_INTERNALS

#include "jinclude.h"

#include "jpeglib.h"

#include "jsimd.h"

#include "jsamplecomp.h"

#if BITS_IN_JSAMPLE != 16 || defined(C_LOSSLESS_SUPPORTED)

/* Private subobject */

typedef struct {

  struct jpeg_color_converter pub; /* public fields */

#if BITS_IN_JSAMPLE != 16

  /* Private state for RGB->YCC conversion */

  JLONG *rgb_ycc_tab;           /* => table for RGB to YCbCr conversion */

#endif

} my_color_converter;

typedef my_color_converter *my_cconvert_ptr;

/**************** RGB -> YCbCr conversion: most common case **************/

/*

 * YCbCr is defined per CCIR 601-1, except that Cb and Cr are

 * normalized to the range 0.._MAXJSAMPLE rather than -0.5 .. 0.5.

 * The conversion equations to be implemented are therefore

 *      Y  =  0.29900 * R + 0.58700 * G + 0.11400 * B

 *      Cb = -0.16874 * R - 0.33126 * G + 0.50000 * B  + _CENTERJSAMPLE

 *      Cr =  0.50000 * R - 0.41869 * G - 0.08131 * B  + _CENTERJSAMPLE

 * (These numbers are derived from TIFF 6.0 section 21, dated 3-June-92.)

 * Note: older versions of the IJG code used a zero offset of _MAXJSAMPLE/2,

 * rather than _CENTERJSAMPLE, for Cb and Cr.  This gave equal positive and

 * negative swings for Cb/Cr, but meant that grayscale values (Cb=Cr=0)

 * were not represented exactly.  Now we sacrifice exact representation of

 * maximum red and maximum blue in order to get exact grayscales.

 *

 * To avoid floating-point arithmetic, we represent the fractional constants

 * as integers scaled up by 2^16 (about 4 digits precision); we have to divide

 * the products by 2^16, with appropriate rounding, to get the correct answer.

 *

 * For even more speed, we avoid doing any multiplications in the inner loop

 * by precalculating the constants times R,G,B for all possible values.

 * For 8-bit samples this is very reasonable (only 256 entries per table);

 * for 12-bit samples it is still acceptable.  It's not very reasonable for

 * 16-bit samples, but if you want lossless storage you shouldn't be changing

 * colorspace anyway.

 * The _CENTERJSAMPLE offsets and the rounding fudge-factor of 0.5 are included

 * in the tables to save adding them separately in the inner loop.

 */

#define SCALEBITS       16      /* speediest right-shift on some machines */

#define CBCR_OFFSET     ((JLONG)_CENTERJSAMPLE << SCALEBITS)

#define ONE_HALF        ((JLONG)1 << (SCALEBITS - 1))

#define FIX(x)          ((JLONG)((x) * (1L << SCALEBITS) + 0.5))

/* We allocate one big table and divide it up into eight parts, instead of

 * doing eight alloc_small requests.  This lets us use a single table base

 * address, which can be held in a register in the inner loops on many

 * machines (more than can hold all eight addresses, anyway).

 */

#define R_Y_OFF         0                       /* offset to R => Y section */

#define G_Y_OFF         (1 * (_MAXJSAMPLE + 1)) /* offset to G => Y section */

#define B_Y_OFF         (2 * (_MAXJSAMPLE + 1)) /* etc. */

#define R_CB_OFF        (3 * (_MAXJSAMPLE + 1))

#define G_CB_OFF        (4 * (_MAXJSAMPLE + 1))

#define B_CB_OFF        (5 * (_MAXJSAMPLE + 1))

#define R_CR_OFF        B_CB_OFF                /* B=>Cb, R=>Cr are the same */

#define G_CR_OFF        (6 * (_MAXJSAMPLE + 1))

#define B_CR_OFF        (7 * (_MAXJSAMPLE + 1))

#define TABLE_SIZE      (8 * (_MAXJSAMPLE + 1))

/* 12-bit samples use a 16-bit data type, so it is possible to pass

 * out-of-range sample values (< 0 or > 4095) to jpeg_write_scanlines().

 * Thus, we mask the incoming 12-bit samples to guard against overrunning

 * or underrunning the conversion tables.

 */

#if BITS_IN_JSAMPLE == 12

#define RANGE_LIMIT(value)  ((value) & 0xFFF)

#else

#define RANGE_LIMIT(value)  (value)

#endif

/* Include inline routines for colorspace extensions */

#include "jccolext.c"

#undef RGB_RED

#undef RGB_GREEN

#undef RGB_BLUE

#undef RGB_PIXELSIZE

#define RGB_RED  EXT_RGB_RED

#define RGB_GREEN  EXT_RGB_GREEN

#define RGB_BLUE  EXT_RGB_BLUE

#define RGB_PIXELSIZE  EXT_RGB_PIXELSIZE

#define rgb_ycc_convert_internal  extrgb_ycc_convert_internal

#define rgb_gray_convert_internal  extrgb_gray_convert_internal

#define rgb_rgb_convert_internal  extrgb_rgb_convert_internal

#include "jccolext.c"

#undef RGB_RED

#undef RGB_GREEN

#undef RGB_BLUE

#undef RGB_PIXELSIZE

#undef rgb_ycc_convert_internal

#undef rgb_gray_convert_internal

#undef rgb_rgb_convert_internal

#define RGB_RED  EXT_RGBX_RED

#define RGB_GREEN  EXT_RGBX_GREEN

#define RGB_BLUE  EXT_RGBX_BLUE

#define RGB_PIXELSIZE  EXT_RGBX_PIXELSIZE

#define rgb_ycc_convert_internal  extrgbx_ycc_convert_internal

#define rgb_gray_convert_internal  extrgbx_gray_convert_internal

#define rgb_rgb_convert_internal  extrgbx_rgb_convert_internal

#include "jccolext.c"

#undef RGB_RED

#undef RGB_GREEN

#undef RGB_BLUE

#undef RGB_PIXELSIZE

#undef rgb_ycc_convert_internal

#undef rgb_gray_convert_internal

#undef rgb_rgb_convert_internal

#define RGB_RED  EXT_BGR_RED

#define RGB_GREEN  EXT_BGR_GREEN

#define RGB_BLUE  EXT_BGR_BLUE

#define RGB_PIXELSIZE  EXT_BGR_PIXELSIZE

#define rgb_ycc_convert_internal  extbgr_ycc_convert_internal

#define rgb_gray_convert_internal  extbgr_gray_convert_internal

#define rgb_rgb_convert_internal  extbgr_rgb_convert_internal

#include "jccolext.c"

#undef RGB_RED

#undef RGB_GREEN

#undef RGB_BLUE

#undef RGB_PIXELSIZE

#undef rgb_ycc_convert_internal

#undef rgb_gray_convert_internal

#undef rgb_rgb_convert_internal

#define RGB_RED  EXT_BGRX_RED

#define RGB_GREEN  EXT_BGRX_GREEN

#define RGB_BLUE  EXT_BGRX_BLUE

#define RGB_PIXELSIZE  EXT_BGRX_PIXELSIZE

#define rgb_ycc_convert_internal  extbgrx_ycc_convert_internal

#define rgb_gray_convert_internal  extbgrx_gray_convert_internal

#define rgb_rgb_convert_internal  extbgrx_rgb_convert_internal

#include "jccolext.c"

#undef RGB_RED

#undef RGB_GREEN

#undef RGB_BLUE

#undef RGB_PIXELSIZE

#undef rgb_ycc_convert_internal

#undef rgb_gray_convert_internal

#undef rgb_rgb_convert_internal

#define RGB_RED  EXT_XBGR_RED

#define RGB_GREEN  EXT_XBGR_GREEN

#define RGB_BLUE  EXT_XBGR_BLUE

#define RGB_PIXELSIZE  EXT_XBGR_PIXELSIZE

#define rgb_ycc_convert_internal  extxbgr_ycc_convert_internal

#define rgb_gray_convert_internal  extxbgr_gray_convert_internal

#define rgb_rgb_convert_internal  extxbgr_rgb_convert_internal

#include "jccolext.c"

#undef RGB_RED

#undef RGB_GREEN

#undef RGB_BLUE

#undef RGB_PIXELSIZE

#undef rgb_ycc_convert_internal

#undef rgb_gray_convert_internal

#undef rgb_rgb_convert_internal

#define RGB_RED  EXT_XRGB_RED

#define RGB_GREEN  EXT_XRGB_GREEN

#define RGB_BLUE  EXT_XRGB_BLUE

#define RGB_PIXELSIZE  EXT_XRGB_PIXELSIZE

#define rgb_ycc_convert_internal  extxrgb_ycc_convert_internal

#define rgb_gray_convert_internal  extxrgb_gray_convert_internal

#define rgb_rgb_convert_internal  extxrgb_rgb_convert_internal

#include "jccolext.c"

#undef RGB_RED

#undef RGB_GREEN

#undef RGB_BLUE

#undef RGB_PIXELSIZE

#undef rgb_ycc_convert_internal

#undef rgb_gray_convert_internal

#undef rgb_rgb_convert_internal

/*

 * Initialize for RGB->YCC colorspace conversion.

 */

METHODDEF(void)

rgb_ycc_start(j_compress_ptr cinfo)

{

#if BITS_IN_JSAMPLE != 16

  my_cconvert_ptr cconvert = (my_cconvert_ptr)cinfo->cconvert;

  JLONG *rgb_ycc_tab;

  JLONG i;

  /* Allocate and fill in the conversion tables. */

  cconvert->rgb_ycc_tab = rgb_ycc_tab = (JLONG *)

    (*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE,

                                (TABLE_SIZE * sizeof(JLONG)));

  for (i = 0; i <= _MAXJSAMPLE; i++) {

    rgb_ycc_tab[i + R_Y_OFF] = FIX(0.29900) * i;

    rgb_ycc_tab[i + G_Y_OFF] = FIX(0.58700) * i;

    rgb_ycc_tab[i + B_Y_OFF] = FIX(0.11400) * i   + ONE_HALF;

    rgb_ycc_tab[i + R_CB_OFF] = (-FIX(0.16874)) * i;

    rgb_ycc_tab[i + G_CB_OFF] = (-FIX(0.33126)) * i;

    /* We use a rounding fudge-factor of 0.5-epsilon for Cb and Cr.

     * This ensures that the maximum output will round to _MAXJSAMPLE

     * not _MAXJSAMPLE+1, and thus that we don't have to range-limit.

     */

    rgb_ycc_tab[i + B_CB_OFF] = FIX(0.50000) * i  + CBCR_OFFSET + ONE_HALF - 1;

/*  B=>Cb and R=>Cr tables are the same

    rgb_ycc_tab[i + R_CR_OFF] = FIX(0.50000) * i  + CBCR_OFFSET + ONE_HALF - 1;

*/

    rgb_ycc_tab[i + G_CR_OFF] = (-FIX(0.41869)) * i;

    rgb_ycc_tab[i + B_CR_OFF] = (-FIX(0.08131)) * i;

  }

#else

  ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

#endif

}

/*

 * Convert some rows of samples to the JPEG colorspace.

 */

METHODDEF(void)

rgb_ycc_convert(j_compress_ptr cinfo, _JSAMPARRAY input_buf,

                _JSAMPIMAGE output_buf, JDIMENSION output_row, int num_rows)

{

  switch (cinfo->in_color_space) {

  case JCS_EXT_RGB:

    extrgb_ycc_convert_internal(cinfo, input_buf, output_buf, output_row,

                                num_rows);

    break;

  case JCS_EXT_RGBX:

  case JCS_EXT_RGBA:

    extrgbx_ycc_convert_internal(cinfo, input_buf, output_buf, output_row,

                                 num_rows);

    break;

  case JCS_EXT_BGR:

    extbgr_ycc_convert_internal(cinfo, input_buf, output_buf, output_row,

                                num_rows);

    break;

  case JCS_EXT_BGRX:

  case JCS_EXT_BGRA:

    extbgrx_ycc_convert_internal(cinfo, input_buf, output_buf, output_row,

                                 num_rows);

    break;

  case JCS_EXT_XBGR:

  case JCS_EXT_ABGR:

    extxbgr_ycc_convert_internal(cinfo, input_buf, output_buf, output_row,

                                 num_rows);

    break;

  case JCS_EXT_XRGB:

  case JCS_EXT_ARGB:

    extxrgb_ycc_convert_internal(cinfo, input_buf, output_buf, output_row,

                                 num_rows);

    break;

  default:

    rgb_ycc_convert_internal(cinfo, input_buf, output_buf, output_row,

                             num_rows);

    break;

  }

}

/**************** Cases other than RGB -> YCbCr **************/

/*

 * Convert some rows of samples to the JPEG colorspace.

 */

METHODDEF(void)

rgb_gray_convert(j_compress_ptr cinfo, _JSAMPARRAY input_buf,

                 _JSAMPIMAGE output_buf, JDIMENSION output_row, int num_rows)

{

  switch (cinfo->in_color_space) {

  case JCS_EXT_RGB:

    extrgb_gray_convert_internal(cinfo, input_buf, output_buf, output_row,

                                 num_rows);

    break;

  case JCS_EXT_RGBX:

  case JCS_EXT_RGBA:

    extrgbx_gray_convert_internal(cinfo, input_buf, output_buf, output_row,

                                  num_rows);

    break;

  case JCS_EXT_BGR:

    extbgr_gray_convert_internal(cinfo, input_buf, output_buf, output_row,

                                 num_rows);

    break;

  case JCS_EXT_BGRX:

  case JCS_EXT_BGRA:

    extbgrx_gray_convert_internal(cinfo, input_buf, output_buf, output_row,

                                  num_rows);

    break;

  case JCS_EXT_XBGR:

  case JCS_EXT_ABGR:

    extxbgr_gray_convert_internal(cinfo, input_buf, output_buf, output_row,

                                  num_rows);

    break;

  case JCS_EXT_XRGB:

  case JCS_EXT_ARGB:

    extxrgb_gray_convert_internal(cinfo, input_buf, output_buf, output_row,

                                  num_rows);

    break;

  default:

    rgb_gray_convert_internal(cinfo, input_buf, output_buf, output_row,

                              num_rows);

    break;

  }

}

/*

 * Extended RGB to plain RGB conversion

 */

METHODDEF(void)

rgb_rgb_convert(j_compress_ptr cinfo, _JSAMPARRAY input_buf,

                _JSAMPIMAGE output_buf, JDIMENSION output_row, int num_rows)

{

  switch (cinfo->in_color_space) {

  case JCS_EXT_RGB:

    extrgb_rgb_convert_internal(cinfo, input_buf, output_buf, output_row,

                                num_rows);

    break;

  case JCS_EXT_RGBX:

  case JCS_EXT_RGBA:

    extrgbx_rgb_convert_internal(cinfo, input_buf, output_buf, output_row,

                                 num_rows);

    break;

  case JCS_EXT_BGR:

    extbgr_rgb_convert_internal(cinfo, input_buf, output_buf, output_row,

                                num_rows);

    break;

  case JCS_EXT_BGRX:

  case JCS_EXT_BGRA:

    extbgrx_rgb_convert_internal(cinfo, input_buf, output_buf, output_row,

                                 num_rows);

    break;

  case JCS_EXT_XBGR:

  case JCS_EXT_ABGR:

    extxbgr_rgb_convert_internal(cinfo, input_buf, output_buf, output_row,

                                 num_rows);

    break;

  case JCS_EXT_XRGB:

  case JCS_EXT_ARGB:

    extxrgb_rgb_convert_internal(cinfo, input_buf, output_buf, output_row,

                                 num_rows);

    break;

  default:

    rgb_rgb_convert_internal(cinfo, input_buf, output_buf, output_row,

                             num_rows);

    break;

  }

}

/*

 * Convert some rows of samples to the JPEG colorspace.

 * This version handles Adobe-style CMYK->YCCK conversion,

 * where we convert R=1-C, G=1-M, and B=1-Y to YCbCr using the same

 * conversion as above, while passing K (black) unchanged.

 * We assume rgb_ycc_start has been called.

 */

METHODDEF(void)

cmyk_ycck_convert(j_compress_ptr cinfo, _JSAMPARRAY input_buf,

                  _JSAMPIMAGE output_buf, JDIMENSION output_row, int num_rows)

{

#if BITS_IN_JSAMPLE != 16

  my_cconvert_ptr cconvert = (my_cconvert_ptr)cinfo->cconvert;

  register int r, g, b;

  register JLONG *ctab = cconvert->rgb_ycc_tab;

  register _JSAMPROW inptr;

  register _JSAMPROW outptr0, outptr1, outptr2, outptr3;

  register JDIMENSION col;

  JDIMENSION num_cols = cinfo->image_width;

  while (--num_rows >= 0) {

    inptr = *input_buf++;

    outptr0 = output_buf[0][output_row];

    outptr1 = output_buf[1][output_row];

    outptr2 = output_buf[2][output_row];

    outptr3 = output_buf[3][output_row];

    output_row++;

    for (col = 0; col < num_cols; col++) {

      r = _MAXJSAMPLE - RANGE_LIMIT(inptr[0]);

      g = _MAXJSAMPLE - RANGE_LIMIT(inptr[1]);

      b = _MAXJSAMPLE - RANGE_LIMIT(inptr[2]);

      /* K passes through as-is */

      outptr3[col] = inptr[3];

      inptr += 4;

      /* If the inputs are 0.._MAXJSAMPLE, the outputs of these equations

       * must be too; we do not need an explicit range-limiting operation.

       * Hence the value being shifted is never negative, and we don't

       * need the general RIGHT_SHIFT macro.

       */

      /* Y */

      outptr0[col] = (_JSAMPLE)((ctab[r + R_Y_OFF] + ctab[g + G_Y_OFF] +

                                 ctab[b + B_Y_OFF]) >> SCALEBITS);

      /* Cb */

      outptr1[col] = (_JSAMPLE)((ctab[r + R_CB_OFF] + ctab[g + G_CB_OFF] +

                                 ctab[b + B_CB_OFF]) >> SCALEBITS);

      /* Cr */

      outptr2[col] = (_JSAMPLE)((ctab[r + R_CR_OFF] + ctab[g + G_CR_OFF] +

                                 ctab[b + B_CR_OFF]) >> SCALEBITS);

    }

  }

#else

  ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

#endif

}

/*

 * Convert some rows of samples to the JPEG colorspace.

 * This version handles grayscale output with no conversion.

 * The source can be either plain grayscale or YCbCr (since Y == gray).

 */

METHODDEF(void)

grayscale_convert(j_compress_ptr cinfo, _JSAMPARRAY input_buf,

                  _JSAMPIMAGE output_buf, JDIMENSION output_row, int num_rows)

{

  register _JSAMPROW inptr;

  register _JSAMPROW outptr;

  register JDIMENSION col;

  JDIMENSION num_cols = cinfo->image_width;

  int instride = cinfo->input_components;

  while (--num_rows >= 0) {

    inptr = *input_buf++;

    outptr = output_buf[0][output_row];

    output_row++;

    for (col = 0; col < num_cols; col++) {

      outptr[col] = inptr[0];

      inptr += instride;

    }

  }

}

/*

 * Convert some rows of samples to the JPEG colorspace.

 * This version handles multi-component colorspaces without conversion.

 * We assume input_components == num_components.

 */

METHODDEF(void)

null_convert(j_compress_ptr cinfo, _JSAMPARRAY input_buf,

             _JSAMPIMAGE output_buf, JDIMENSION output_row, int num_rows)

{

  register _JSAMPROW inptr;

  register _JSAMPROW outptr, outptr0, outptr1, outptr2, outptr3;

  register JDIMENSION col;

  register int ci;

  int nc = cinfo->num_components;

  JDIMENSION num_cols = cinfo->image_width;

  if (nc == 3) {

    while (--num_rows >= 0) {

      inptr = *input_buf++;

      outptr0 = output_buf[0][output_row];

      outptr1 = output_buf[1][output_row];

      outptr2 = output_buf[2][output_row];

      output_row++;

      for (col = 0; col < num_cols; col++) {

        outptr0[col] = *inptr++;

        outptr1[col] = *inptr++;

        outptr2[col] = *inptr++;

      }

    }

  } else if (nc == 4) {

    while (--num_rows >= 0) {

      inptr = *input_buf++;

      outptr0 = output_buf[0][output_row];

      outptr1 = output_buf[1][output_row];

      outptr2 = output_buf[2][output_row];

      outptr3 = output_buf[3][output_row];

      output_row++;

      for (col = 0; col < num_cols; col++) {

        outptr0[col] = *inptr++;

        outptr1[col] = *inptr++;

        outptr2[col] = *inptr++;

        outptr3[col] = *inptr++;

      }

    }

  } else {

    while (--num_rows >= 0) {

      /* It seems fastest to make a separate pass for each component. */

      for (ci = 0; ci < nc; ci++) {

        inptr = *input_buf;

        outptr = output_buf[ci][output_row];

        for (col = 0; col < num_cols; col++) {

          outptr[col] = inptr[ci];

          inptr += nc;

        }

      }

      input_buf++;

      output_row++;

    }

  }

}

/*

 * Empty method for start_pass.

 */

METHODDEF(void)

null_method(j_compress_ptr cinfo)

{

  /* no work needed */

}

/*

 * Module initialization routine for input colorspace conversion.

 */

GLOBAL(void)

_jinit_color_converter(j_compress_ptr cinfo)

{

  my_cconvert_ptr cconvert;

  if (cinfo->data_precision != BITS_IN_JSAMPLE)

    ERREXIT1(cinfo, JERR_BAD_PRECISION, cinfo->data_precision);

  cconvert = (my_cconvert_ptr)

    (*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE,

                                sizeof(my_color_converter));

  cinfo->cconvert = (struct jpeg_color_converter *)cconvert;

  /* set start_pass to null method until we find out differently */

  cconvert->pub.start_pass = null_method;

  /* Make sure input_components agrees with in_color_space */

  switch (cinfo->in_color_space) {

  case JCS_GRAYSCALE:

    if (cinfo->input_components != 1)

      ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);

    break;

  case JCS_RGB:

  case JCS_EXT_RGB:

  case JCS_EXT_RGBX:

  case JCS_EXT_BGR:

  case JCS_EXT_BGRX:

  case JCS_EXT_XBGR:

  case JCS_EXT_XRGB:

  case JCS_EXT_RGBA:

  case JCS_EXT_BGRA:

  case JCS_EXT_ABGR:

  case JCS_EXT_ARGB:

    if (cinfo->input_components != rgb_pixelsize[cinfo->in_color_space])

      ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);

    break;

  case JCS_YCbCr:

    if (cinfo->input_components != 3)

      ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);

    break;

  case JCS_CMYK:

  case JCS_YCCK:

    if (cinfo->input_components != 4)

      ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);

    break;

  default:                      /* JCS_UNKNOWN can be anything */

    if (cinfo->input_components < 1)

      ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);

    break;

  }

  /* Check num_components, set conversion method based on requested space.

   * NOTE: We do not allow any lossy color conversion algorithms in lossless

   * mode.

   */

  switch (cinfo->jpeg_color_space) {

  case JCS_GRAYSCALE:

    if (cinfo->master->lossless &&

        cinfo->in_color_space != cinfo->jpeg_color_space)

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

    if (cinfo->num_components != 1)

      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);

    if (cinfo->in_color_space == JCS_GRAYSCALE)

      cconvert->pub._color_convert = grayscale_convert;

    else if (IsExtRGB(cinfo->in_color_space)) {

#ifdef WITH_SIMD

      if (jsimd_can_rgb_gray())

        cconvert->pub._color_convert = jsimd_rgb_gray_convert;

      else

#endif

      {

        cconvert->pub.start_pass = rgb_ycc_start;

        cconvert->pub._color_convert = rgb_gray_convert;

      }

    } else if (cinfo->in_color_space == JCS_YCbCr)

      cconvert->pub._color_convert = grayscale_convert;

    else

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

    break;

  case JCS_RGB:

    if (cinfo->master->lossless && !IsExtRGB(cinfo->in_color_space))

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

    if (cinfo->num_components != 3)

      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);

    if (rgb_red[cinfo->in_color_space] == 0 &&

        rgb_green[cinfo->in_color_space] == 1 &&

        rgb_blue[cinfo->in_color_space] == 2 &&

        rgb_pixelsize[cinfo->in_color_space] == 3) {

#if defined(WITH_SIMD) && defined(__mips__)

      if (jsimd_c_can_null_convert())

        cconvert->pub._color_convert = jsimd_c_null_convert;

      else

#endif

        cconvert->pub._color_convert = null_convert;

    } else if (IsExtRGB(cinfo->in_color_space))

      cconvert->pub._color_convert = rgb_rgb_convert;

    else

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

    break;

  case JCS_YCbCr:

    if (cinfo->master->lossless &&

        cinfo->in_color_space != cinfo->jpeg_color_space)

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

    if (cinfo->num_components != 3)

      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);

    if (IsExtRGB(cinfo->in_color_space)) {

#ifdef WITH_SIMD

      if (jsimd_can_rgb_ycc())

        cconvert->pub._color_convert = jsimd_rgb_ycc_convert;

      else

#endif

      {

        cconvert->pub.start_pass = rgb_ycc_start;

        cconvert->pub._color_convert = rgb_ycc_convert;

      }

    } else if (cinfo->in_color_space == JCS_YCbCr) {

#if defined(WITH_SIMD) && defined(__mips__)

      if (jsimd_c_can_null_convert())

        cconvert->pub._color_convert = jsimd_c_null_convert;

      else

#endif

        cconvert->pub._color_convert = null_convert;

    } else

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

    break;

  case JCS_CMYK:

    if (cinfo->master->lossless &&

        cinfo->in_color_space != cinfo->jpeg_color_space)

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

    if (cinfo->num_components != 4)

      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);

    if (cinfo->in_color_space == JCS_CMYK) {

#if defined(WITH_SIMD) && defined(__mips__)

      if (jsimd_c_can_null_convert())

        cconvert->pub._color_convert = jsimd_c_null_convert;

      else

#endif

        cconvert->pub._color_convert = null_convert;

    } else

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

    break;

  case JCS_YCCK:

    if (cinfo->master->lossless &&

        cinfo->in_color_space != cinfo->jpeg_color_space)

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

    if (cinfo->num_components != 4)

      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);

    if (cinfo->in_color_space == JCS_CMYK) {

      cconvert->pub.start_pass = rgb_ycc_start;

      cconvert->pub._color_convert = cmyk_ycck_convert;

    } else if (cinfo->in_color_space == JCS_YCCK) {

#if defined(WITH_SIMD) && defined(__mips__)

      if (jsimd_c_can_null_convert())

        cconvert->pub._color_convert = jsimd_c_null_convert;

      else

#endif

        cconvert->pub._color_convert = null_convert;

    } else

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

    break;

  default:                      /* allow null conversion of JCS_UNKNOWN */

    if (cinfo->jpeg_color_space != cinfo->in_color_space ||

        cinfo->num_components != cinfo->input_components)

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

#if defined(WITH_SIMD) && defined(__mips__)

    if (jsimd_c_can_null_convert())

      cconvert->pub._color_convert = jsimd_c_null_convert;

    else

#endif

      cconvert->pub._color_convert = null_convert;

    break;

  }

}

jinit_color_converter

Line

Count

Source

552

29.2k

{

553

29.2k

  my_cconvert_ptr cconvert;

554

555

29.2k

  if (cinfo->data_precision != BITS_IN_JSAMPLE)

556

0

    ERREXIT1(cinfo, JERR_BAD_PRECISION, cinfo->data_precision);

557

558

29.2k

  cconvert = (my_cconvert_ptr)

559

29.2k

    (*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE,

560

29.2k

                                sizeof(my_color_converter));

561

29.2k

  cinfo->cconvert = (struct jpeg_color_converter *)cconvert;

562

  /* set start_pass to null method until we find out differently */

563

29.2k

  cconvert->pub.start_pass = null_method;

564

565

  /* Make sure input_components agrees with in_color_space */

566

29.2k

  switch (cinfo->in_color_space) {

567

3.80k

  case JCS_GRAYSCALE:

568

3.80k

    if (cinfo->input_components != 1)

569

0

      ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);

570

3.80k

    break;

571

572

0

  case JCS_RGB:

573

4.56k

  case JCS_EXT_RGB:

574

7.21k

  case JCS_EXT_RGBX:

575

13.6k

  case JCS_EXT_BGR:

576

13.6k

  case JCS_EXT_BGRX:

577

15.6k

  case JCS_EXT_XBGR:

578

20.1k

  case JCS_EXT_XRGB:

579

20.1k

  case JCS_EXT_RGBA:

580

22.8k

  case JCS_EXT_BGRA:

581

22.8k

  case JCS_EXT_ABGR:

582

22.8k

  case JCS_EXT_ARGB:

583

22.8k

    if (cinfo->input_components != rgb_pixelsize[cinfo->in_color_space])

584

0

      ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);

585

22.8k

    break;

586

587

0

  case JCS_YCbCr:

588

0

    if (cinfo->input_components != 3)

589

0

      ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);

590

0

    break;

591

592

2.65k

  case JCS_CMYK:

593

2.65k

  case JCS_YCCK:

594

2.65k

    if (cinfo->input_components != 4)

595

0

      ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);

596

2.65k

    break;

597

598

0

  default:                      /* JCS_UNKNOWN can be anything */

599

0

    if (cinfo->input_components < 1)

600

0

      ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);

601

0

    break;

602

29.2k

  }

603

604

  /* Check num_components, set conversion method based on requested space.

605

   * NOTE: We do not allow any lossy color conversion algorithms in lossless

606

   * mode.

607

   */

608

29.2k

  switch (cinfo->jpeg_color_space) {

609

7.74k

  case JCS_GRAYSCALE:

610

7.74k

    if (cinfo->master->lossless &&

611

7.74k

        cinfo->in_color_space != cinfo->jpeg_color_space)

612

0

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

613

7.74k

    if (cinfo->num_components != 1)

614

0

      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);

615

7.74k

    if (cinfo->in_color_space == JCS_GRAYSCALE)

616

3.80k

      cconvert->pub._color_convert = grayscale_convert;

617

3.93k

    else if (IsExtRGB(cinfo->in_color_space)) {

618

3.93k

#ifdef WITH_SIMD

619

3.93k

      if (jsimd_can_rgb_gray())

620

3.93k

        cconvert->pub._color_convert = jsimd_rgb_gray_convert;

621

0

      else

622

0

#endif

623

0

      {

624

0

        cconvert->pub.start_pass = rgb_ycc_start;

625

0

        cconvert->pub._color_convert = rgb_gray_convert;

626

0

      }

627

3.93k

    } else if (cinfo->in_color_space == JCS_YCbCr)

628

0

      cconvert->pub._color_convert = grayscale_convert;

629

0

    else

630

0

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

631

7.74k

    break;

632

633

3.14k

  case JCS_RGB:

634

3.14k

    if (cinfo->master->lossless && !IsExtRGB(cinfo->in_color_space))

635

0

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

636

3.14k

    if (cinfo->num_components != 3)

637

0

      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);

638

3.14k

    if (rgb_red[cinfo->in_color_space] == 0 &&

639

3.14k

        rgb_green[cinfo->in_color_space] == 1 &&

640

3.14k

        rgb_blue[cinfo->in_color_space] == 2 &&

641

3.14k

        rgb_pixelsize[cinfo->in_color_space] == 3) {

642

#if defined(WITH_SIMD) && defined(__mips__)

643

      if (jsimd_c_can_null_convert())

644

        cconvert->pub._color_convert = jsimd_c_null_convert;

645

      else

646

#endif

647

628

        cconvert->pub._color_convert = null_convert;

648

2.51k

    } else if (IsExtRGB(cinfo->in_color_space))

649

2.51k

      cconvert->pub._color_convert = rgb_rgb_convert;

650

0

    else

651

0

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

652

3.14k

    break;

653

654

15.7k

  case JCS_YCbCr:

655

15.7k

    if (cinfo->master->lossless &&

656

15.7k

        cinfo->in_color_space != cinfo->jpeg_color_space)

657

0

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

658

15.7k

    if (cinfo->num_components != 3)

659

0

      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);

660

15.7k

    if (IsExtRGB(cinfo->in_color_space)) {

661

15.7k

#ifdef WITH_SIMD

662

15.7k

      if (jsimd_can_rgb_ycc())

663

15.7k

        cconvert->pub._color_convert = jsimd_rgb_ycc_convert;

664

0

      else

665

0

#endif

666

0

      {

667

0

        cconvert->pub.start_pass = rgb_ycc_start;

668

0

        cconvert->pub._color_convert = rgb_ycc_convert;

669

0

      }

670

15.7k

    } else if (cinfo->in_color_space == JCS_YCbCr) {

671

#if defined(WITH_SIMD) && defined(__mips__)

672

      if (jsimd_c_can_null_convert())

673

        cconvert->pub._color_convert = jsimd_c_null_convert;

674

      else

675

#endif

676

0

        cconvert->pub._color_convert = null_convert;

677

0

    } else

678

0

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

679

15.7k

    break;

680

681

628

  case JCS_CMYK:

682

628

    if (cinfo->master->lossless &&

683

628

        cinfo->in_color_space != cinfo->jpeg_color_space)

684

0

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

685

628

    if (cinfo->num_components != 4)

686

0

      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);

687

628

    if (cinfo->in_color_space == JCS_CMYK) {

688

#if defined(WITH_SIMD) && defined(__mips__)

689

      if (jsimd_c_can_null_convert())

690

        cconvert->pub._color_convert = jsimd_c_null_convert;

691

      else

692

#endif

693

628

        cconvert->pub._color_convert = null_convert;

694

628

    } else

695

0

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

696

628

    break;

697

698

2.02k

  case JCS_YCCK:

699

2.02k

    if (cinfo->master->lossless &&

700

2.02k

        cinfo->in_color_space != cinfo->jpeg_color_space)

701

0

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

702

2.02k

    if (cinfo->num_components != 4)

703

0

      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);

704

2.02k

    if (cinfo->in_color_space == JCS_CMYK) {

705

2.02k

      cconvert->pub.start_pass = rgb_ycc_start;

706

2.02k

      cconvert->pub._color_convert = cmyk_ycck_convert;

707

2.02k

    } else if (cinfo->in_color_space == JCS_YCCK) {

708

#if defined(WITH_SIMD) && defined(__mips__)

709

      if (jsimd_c_can_null_convert())

710

        cconvert->pub._color_convert = jsimd_c_null_convert;

711

      else

712

#endif

713

0

        cconvert->pub._color_convert = null_convert;

714

0

    } else

715

0

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

716

2.02k

    break;

717

718

0

  default:                      /* allow null conversion of JCS_UNKNOWN */

719

0

    if (cinfo->jpeg_color_space != cinfo->in_color_space ||

720

0

        cinfo->num_components != cinfo->input_components)

721

0

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

722

#if defined(WITH_SIMD) && defined(__mips__)

723

    if (jsimd_c_can_null_convert())

724

      cconvert->pub._color_convert = jsimd_c_null_convert;

725

    else

726

#endif

727

0

      cconvert->pub._color_convert = null_convert;

728

0

    break;

729

29.2k

  }

730

29.2k

}

j12init_color_converter

Line

Count

Source

552

25.9k

{

553

25.9k

  my_cconvert_ptr cconvert;

554

555

25.9k

  if (cinfo->data_precision != BITS_IN_JSAMPLE)

556

0

    ERREXIT1(cinfo, JERR_BAD_PRECISION, cinfo->data_precision);

557

558

25.9k

  cconvert = (my_cconvert_ptr)

559

25.9k

    (*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE,

560

25.9k

                                sizeof(my_color_converter));

561

25.9k

  cinfo->cconvert = (struct jpeg_color_converter *)cconvert;

562

  /* set start_pass to null method until we find out differently */

563

25.9k

  cconvert->pub.start_pass = null_method;

564

565

  /* Make sure input_components agrees with in_color_space */

566

25.9k

  switch (cinfo->in_color_space) {

567

3.18k

  case JCS_GRAYSCALE:

568

3.18k

    if (cinfo->input_components != 1)

569

0

      ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);

570

3.18k

    break;

571

572

0

  case JCS_RGB:

573

3.80k

  case JCS_EXT_RGB:

574

7.60k

  case JCS_EXT_RGBX:

575

11.4k

  case JCS_EXT_BGR:

576

11.4k

  case JCS_EXT_BGRX:

577

11.4k

  case JCS_EXT_XBGR:

578

15.2k

  case JCS_EXT_XRGB:

579

15.2k

  case JCS_EXT_RGBA:

580

19.0k

  case JCS_EXT_BGRA:

581

19.0k

  case JCS_EXT_ABGR:

582

19.0k

  case JCS_EXT_ARGB:

583

19.0k

    if (cinfo->input_components != rgb_pixelsize[cinfo->in_color_space])

584

0

      ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);

585

19.0k

    break;

586

587

0

  case JCS_YCbCr:

588

0

    if (cinfo->input_components != 3)

589

0

      ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);

590

0

    break;

591

592

3.80k

  case JCS_CMYK:

593

3.80k

  case JCS_YCCK:

594

3.80k

    if (cinfo->input_components != 4)

595

0

      ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);

596

3.80k

    break;

597

598

0

  default:                      /* JCS_UNKNOWN can be anything */

599

0

    if (cinfo->input_components < 1)

600

0

      ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);

601

0

    break;

602

25.9k

  }

603

604

  /* Check num_components, set conversion method based on requested space.

605

   * NOTE: We do not allow any lossy color conversion algorithms in lossless

606

   * mode.

607

   */

608

25.9k

  switch (cinfo->jpeg_color_space) {

609

6.98k

  case JCS_GRAYSCALE:

610

6.98k

    if (cinfo->master->lossless &&

611

6.98k

        cinfo->in_color_space != cinfo->jpeg_color_space)

612

0

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

613

6.98k

    if (cinfo->num_components != 1)

614

0

      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);

615

6.98k

    if (cinfo->in_color_space == JCS_GRAYSCALE)

616

3.18k

      cconvert->pub._color_convert = grayscale_convert;

617

3.80k

    else if (IsExtRGB(cinfo->in_color_space)) {

618

#ifdef WITH_SIMD

619

      if (jsimd_can_rgb_gray())

620

        cconvert->pub._color_convert = jsimd_rgb_gray_convert;

621

      else

622

#endif

623

3.80k

      {

624

3.80k

        cconvert->pub.start_pass = rgb_ycc_start;

625

3.80k

        cconvert->pub._color_convert = rgb_gray_convert;

626

3.80k

      }

627

3.80k

    } else if (cinfo->in_color_space == JCS_YCbCr)

628

0

      cconvert->pub._color_convert = grayscale_convert;

629

0

    else

630

0

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

631

6.98k

    break;

632

633

0

  case JCS_RGB:

634

0

    if (cinfo->master->lossless && !IsExtRGB(cinfo->in_color_space))

635

0

      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

636

0

    if (cinfo->num_components != 3)

637

0

      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);

638

0

    if (rgb_red[cinfo->in_color_space] == 0 &&

639

0

        rgb_green[cinfo->in_color_space] == 1 &&

640

0

        rgb_blue[cinfo->in_color_space] == 2 &&