Remove damned ancient DOS line endings from Irrlicht. Hopefully I did not go overboard.

1 files changed, 490 insertions, 490 deletions

diff --git a/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jccolor.c b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jccolor.c
index 12d35f4..3e2d0e9 100644
--- a/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jccolor.c
+++ b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jccolor.c
@@ -1,490 +1,490 @@
-/*

- * jccolor.c

- *

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

- * Modified 2011 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.

- *

- * This file contains input colorspace conversion routines.

- */

-

-#define JPEG_INTERNALS

-#include "jinclude.h"

-#include "jpeglib.h"

-

-

-/* Private subobject */

-

-typedef struct {

-  struct jpeg_color_converter pub; /* public fields */

-

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

-  INT32 * rgb_ycc_tab;          /* => table for RGB to YCbCr conversion */

-} 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 JSAMPLEs 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     ((INT32) CENTERJSAMPLE << SCALEBITS)

-#define ONE_HALF        ((INT32) 1 << (SCALEBITS-1))

-#define FIX(x)          ((INT32) ((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))

-

-

-/*

- * Initialize for RGB->YCC colorspace conversion.

- */

-

-METHODDEF(void)

-rgb_ycc_start (j_compress_ptr cinfo)

-{

-  my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;

-  INT32 * rgb_ycc_tab;

-  INT32 i;

-

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

-  cconvert->rgb_ycc_tab = rgb_ycc_tab = (INT32 *)

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

-                                (TABLE_SIZE * SIZEOF(INT32)));

-

-  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;

-  }

-}

-

-

-/*

- * Convert some rows of samples to the JPEG colorspace.

- *

- * Note that we change from the application's interleaved-pixel format

- * to our internal noninterleaved, one-plane-per-component format.

- * The input buffer is therefore three times as wide as the output buffer.

- *

- * A starting row offset is provided only for the output buffer.  The caller

- * can easily adjust the passed input_buf value to accommodate any row

- * offset required on that side.

- */

-

-METHODDEF(void)

-rgb_ycc_convert (j_compress_ptr cinfo,

-                 JSAMPARRAY input_buf, JSAMPIMAGE output_buf,

-                 JDIMENSION output_row, int num_rows)

-{

-  my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;

-  register int r, g, b;

-  register INT32 * ctab = cconvert->rgb_ycc_tab;

-  register JSAMPROW inptr;

-  register JSAMPROW outptr0, outptr1, outptr2;

-  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];

-    output_row++;

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

-      r = GETJSAMPLE(inptr[RGB_RED]);

-      g = GETJSAMPLE(inptr[RGB_GREEN]);

-      b = GETJSAMPLE(inptr[RGB_BLUE]);

-      inptr += RGB_PIXELSIZE;

-      /* 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);

-    }

-  }

-}

-

-

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

-

-

-/*

- * Convert some rows of samples to the JPEG colorspace.

- * This version handles RGB->grayscale conversion, which is the same

- * as the RGB->Y portion of RGB->YCbCr.

- * We assume rgb_ycc_start has been called (we only use the Y tables).

- */

-

-METHODDEF(void)

-rgb_gray_convert (j_compress_ptr cinfo,

-                  JSAMPARRAY input_buf, JSAMPIMAGE output_buf,

-                  JDIMENSION output_row, int num_rows)

-{

-  my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;

-  register int r, g, b;

-  register INT32 * ctab = cconvert->rgb_ycc_tab;

-  register JSAMPROW inptr;

-  register JSAMPROW outptr;

-  register JDIMENSION col;

-  JDIMENSION num_cols = cinfo->image_width;

-

-  while (--num_rows >= 0) {

-    inptr = *input_buf++;

-    outptr = output_buf[0][output_row];

-    output_row++;

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

-      r = GETJSAMPLE(inptr[RGB_RED]);

-      g = GETJSAMPLE(inptr[RGB_GREEN]);

-      b = GETJSAMPLE(inptr[RGB_BLUE]);

-      inptr += RGB_PIXELSIZE;

-      /* Y */

-      outptr[col] = (JSAMPLE)

-                ((ctab[r+R_Y_OFF] + ctab[g+G_Y_OFF] + ctab[b+B_Y_OFF])

-                 >> SCALEBITS);

-    }

-  }

-}

-

-

-/*

- * 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)

-{

-  my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;

-  register int r, g, b;

-  register INT32 * 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 - GETJSAMPLE(inptr[0]);

-      g = MAXJSAMPLE - GETJSAMPLE(inptr[1]);

-      b = MAXJSAMPLE - GETJSAMPLE(inptr[2]);

-      /* K passes through as-is */

-      outptr3[col] = inptr[3];  /* don't need GETJSAMPLE here */

-      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);

-    }

-  }

-}

-

-

-/*

- * 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];   /* don't need GETJSAMPLE() here */

-      inptr += instride;

-    }

-  }

-}

-

-

-/*

- * Convert some rows of samples to the JPEG colorspace.

- * No colorspace conversion, but change from interleaved

- * to separate-planes representation.

- */

-

-METHODDEF(void)

-rgb_convert (j_compress_ptr cinfo,

-             JSAMPARRAY input_buf, JSAMPIMAGE output_buf,

-             JDIMENSION output_row, int num_rows)

-{

-  register JSAMPROW inptr;

-  register JSAMPROW outptr0, outptr1, outptr2;

-  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];

-    output_row++;

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

-      /* We can dispense with GETJSAMPLE() here */

-      outptr0[col] = inptr[RGB_RED];

-      outptr1[col] = inptr[RGB_GREEN];

-      outptr2[col] = inptr[RGB_BLUE];

-      inptr += RGB_PIXELSIZE;

-    }

-  }

-}

-

-

-/*

- * 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;

-  register JDIMENSION col;

-  register int ci;

-  int nc = cinfo->num_components;

-  JDIMENSION num_cols = cinfo->image_width;

-

-  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]; /* don't need GETJSAMPLE() here */

-        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;

-

-  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:

-    if (cinfo->input_components != RGB_PIXELSIZE)

-      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 */

-  switch (cinfo->jpeg_color_space) {

-  case JCS_GRAYSCALE:

-    if (cinfo->num_components != 1)

-      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);

-    if (cinfo->in_color_space == JCS_GRAYSCALE ||

-        cinfo->in_color_space == JCS_YCbCr)

-      cconvert->pub.color_convert = grayscale_convert;

-    else if (cinfo->in_color_space == JCS_RGB) {

-      cconvert->pub.start_pass = rgb_ycc_start;

-      cconvert->pub.color_convert = rgb_gray_convert;

-    } else

-      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

-    break;

-

-  case JCS_RGB:

-    if (cinfo->num_components != 3)

-      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);

-    if (cinfo->in_color_space == JCS_RGB)

-      cconvert->pub.color_convert = rgb_convert;

-    else

-      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

-    break;

-

-  case JCS_YCbCr:

-    if (cinfo->num_components != 3)

-      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);

-    if (cinfo->in_color_space == JCS_RGB) {

-      cconvert->pub.start_pass = rgb_ycc_start;

-      cconvert->pub.color_convert = rgb_ycc_convert;

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

-      cconvert->pub.color_convert = null_convert;

-    else

-      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

-    break;

-

-  case JCS_CMYK:

-    if (cinfo->num_components != 4)

-      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);

-    if (cinfo->in_color_space == JCS_CMYK)

-      cconvert->pub.color_convert = null_convert;

-    else

-      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);

-    break;

-

-  case JCS_YCCK:

-    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)

-      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);

-    cconvert->pub.color_convert = null_convert;

-    break;

-  }

-}

+/*
+ * jccolor.c
+ *
+ * Copyright (C) 1991-1996, Thomas G. Lane.
+ * Modified 2011 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.
+ *
+ * This file contains input colorspace conversion routines.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/* Private subobject */
+
+typedef struct {
+  struct jpeg_color_converter pub; /* public fields */
+
+  /* Private state for RGB->YCC conversion */
+  INT32 * rgb_ycc_tab;          /* => table for RGB to YCbCr conversion */
+} 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 JSAMPLEs 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     ((INT32) CENTERJSAMPLE << SCALEBITS)
+#define ONE_HALF        ((INT32) 1 << (SCALEBITS-1))
+#define FIX(x)          ((INT32) ((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))
+
+
+/*
+ * Initialize for RGB->YCC colorspace conversion.
+ */
+
+METHODDEF(void)
+rgb_ycc_start (j_compress_ptr cinfo)
+{
+  my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
+  INT32 * rgb_ycc_tab;
+  INT32 i;
+
+  /* Allocate and fill in the conversion tables. */
+  cconvert->rgb_ycc_tab = rgb_ycc_tab = (INT32 *)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+                                (TABLE_SIZE * SIZEOF(INT32)));
+
+  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;
+  }
+}
+
+
+/*
+ * Convert some rows of samples to the JPEG colorspace.
+ *
+ * Note that we change from the application's interleaved-pixel format
+ * to our internal noninterleaved, one-plane-per-component format.
+ * The input buffer is therefore three times as wide as the output buffer.
+ *
+ * A starting row offset is provided only for the output buffer.  The caller
+ * can easily adjust the passed input_buf value to accommodate any row
+ * offset required on that side.
+ */
+
+METHODDEF(void)
+rgb_ycc_convert (j_compress_ptr cinfo,
+                 JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
+                 JDIMENSION output_row, int num_rows)
+{
+  my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
+  register int r, g, b;
+  register INT32 * ctab = cconvert->rgb_ycc_tab;
+  register JSAMPROW inptr;
+  register JSAMPROW outptr0, outptr1, outptr2;
+  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];
+    output_row++;
+    for (col = 0; col < num_cols; col++) {
+      r = GETJSAMPLE(inptr[RGB_RED]);
+      g = GETJSAMPLE(inptr[RGB_GREEN]);
+      b = GETJSAMPLE(inptr[RGB_BLUE]);
+      inptr += RGB_PIXELSIZE;
+      /* 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);
+    }
+  }
+}
+
+
+/**************** Cases other than RGB -> YCbCr **************/
+
+
+/*
+ * Convert some rows of samples to the JPEG colorspace.
+ * This version handles RGB->grayscale conversion, which is the same
+ * as the RGB->Y portion of RGB->YCbCr.
+ * We assume rgb_ycc_start has been called (we only use the Y tables).
+ */
+
+METHODDEF(void)
+rgb_gray_convert (j_compress_ptr cinfo,
+                  JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
+                  JDIMENSION output_row, int num_rows)
+{
+  my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
+  register int r, g, b;
+  register INT32 * ctab = cconvert->rgb_ycc_tab;
+  register JSAMPROW inptr;
+  register JSAMPROW outptr;
+  register JDIMENSION col;
+  JDIMENSION num_cols = cinfo->image_width;
+
+  while (--num_rows >= 0) {
+    inptr = *input_buf++;
+    outptr = output_buf[0][output_row];
+    output_row++;
+    for (col = 0; col < num_cols; col++) {
+      r = GETJSAMPLE(inptr[RGB_RED]);
+      g = GETJSAMPLE(inptr[RGB_GREEN]);
+      b = GETJSAMPLE(inptr[RGB_BLUE]);
+      inptr += RGB_PIXELSIZE;
+      /* Y */
+      outptr[col] = (JSAMPLE)
+                ((ctab[r+R_Y_OFF] + ctab[g+G_Y_OFF] + ctab[b+B_Y_OFF])
+                 >> SCALEBITS);
+    }
+  }
+}
+
+
+/*
+ * 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)
+{
+  my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
+  register int r, g, b;
+  register INT32 * 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 - GETJSAMPLE(inptr[0]);
+      g = MAXJSAMPLE - GETJSAMPLE(inptr[1]);
+      b = MAXJSAMPLE - GETJSAMPLE(inptr[2]);
+      /* K passes through as-is */
+      outptr3[col] = inptr[3];  /* don't need GETJSAMPLE here */
+      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);
+    }
+  }
+}
+
+
+/*
+ * 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];   /* don't need GETJSAMPLE() here */
+      inptr += instride;
+    }
+  }
+}
+
+
+/*
+ * Convert some rows of samples to the JPEG colorspace.
+ * No colorspace conversion, but change from interleaved
+ * to separate-planes representation.
+ */
+
+METHODDEF(void)
+rgb_convert (j_compress_ptr cinfo,
+             JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
+             JDIMENSION output_row, int num_rows)
+{
+  register JSAMPROW inptr;
+  register JSAMPROW outptr0, outptr1, outptr2;
+  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];
+    output_row++;
+    for (col = 0; col < num_cols; col++) {
+      /* We can dispense with GETJSAMPLE() here */
+      outptr0[col] = inptr[RGB_RED];
+      outptr1[col] = inptr[RGB_GREEN];
+      outptr2[col] = inptr[RGB_BLUE];
+      inptr += RGB_PIXELSIZE;
+    }
+  }
+}
+
+
+/*
+ * 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;
+  register JDIMENSION col;
+  register int ci;
+  int nc = cinfo->num_components;
+  JDIMENSION num_cols = cinfo->image_width;
+
+  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]; /* don't need GETJSAMPLE() here */
+        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;
+
+  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:
+    if (cinfo->input_components != RGB_PIXELSIZE)
+      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 */
+  switch (cinfo->jpeg_color_space) {
+  case JCS_GRAYSCALE:
+    if (cinfo->num_components != 1)
+      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
+    if (cinfo->in_color_space == JCS_GRAYSCALE ||
+        cinfo->in_color_space == JCS_YCbCr)
+      cconvert->pub.color_convert = grayscale_convert;
+    else if (cinfo->in_color_space == JCS_RGB) {
+      cconvert->pub.start_pass = rgb_ycc_start;
+      cconvert->pub.color_convert = rgb_gray_convert;
+    } else
+      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
+    break;
+
+  case JCS_RGB:
+    if (cinfo->num_components != 3)
+      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
+    if (cinfo->in_color_space == JCS_RGB)
+      cconvert->pub.color_convert = rgb_convert;
+    else
+      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
+    break;
+
+  case JCS_YCbCr:
+    if (cinfo->num_components != 3)
+      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
+    if (cinfo->in_color_space == JCS_RGB) {
+      cconvert->pub.start_pass = rgb_ycc_start;
+      cconvert->pub.color_convert = rgb_ycc_convert;
+    } else if (cinfo->in_color_space == JCS_YCbCr)
+      cconvert->pub.color_convert = null_convert;
+    else
+      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
+    break;
+
+  case JCS_CMYK:
+    if (cinfo->num_components != 4)
+      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
+    if (cinfo->in_color_space == JCS_CMYK)
+      cconvert->pub.color_convert = null_convert;
+    else
+      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
+    break;
+
+  case JCS_YCCK:
+    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)
+      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);
+    cconvert->pub.color_convert = null_convert;
+    break;
+  }
+}