/src/libjpeg-turbo.2.1.x/jccolext.c

Source (jump to first uncovered line)
/*
 * jccolext.c
 *
 * This file was part of the Independent JPEG Group's software:
 * Copyright (C) 1991-1996, Thomas G. Lane.
 * libjpeg-turbo Modifications:
 * Copyright (C) 2009-2012, 2015, 2022, D. R. Commander.
 * For conditions of distribution and use, see the accompanying README.ijg
 * file.
 *
 * This file contains input colorspace conversion routines.
 */


/* This file is included by jccolor.c */


/*
 * 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.
 */

INLINE
LOCAL(void)
rgb_ycc_convert_internal(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 JLONG *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 = RANGE_LIMIT(inptr[RGB_RED]);
      g = RANGE_LIMIT(inptr[RGB_GREEN]);
      b = RANGE_LIMIT(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).
 */

INLINE
LOCAL(void)
rgb_gray_convert_internal(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 JLONG *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 = RANGE_LIMIT(inptr[RGB_RED]);
      g = RANGE_LIMIT(inptr[RGB_GREEN]);
      b = RANGE_LIMIT(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 extended RGB->plain RGB conversion
 */

INLINE
LOCAL(void)
rgb_rgb_convert_internal(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++) {
      outptr0[col] = inptr[RGB_RED];
      outptr1[col] = inptr[RGB_GREEN];
      outptr2[col] = inptr[RGB_BLUE];
      inptr += RGB_PIXELSIZE;
    }
  }
}

Line	Count	Source (jump to first uncovered line)
1		/*
2		* jccolext.c
3		*
4		* This file was part of the Independent JPEG Group's software:
5		* Copyright (C) 1991-1996, Thomas G. Lane.
6		* libjpeg-turbo Modifications:
7		* Copyright (C) 2009-2012, 2015, 2022, D. R. Commander.
8		* For conditions of distribution and use, see the accompanying README.ijg
9		* file.
10		*
11		* This file contains input colorspace conversion routines.
12		*/
13
14
15		/* This file is included by jccolor.c */
16
17
18		/*
19		* Convert some rows of samples to the JPEG colorspace.
20		*
21		* Note that we change from the application's interleaved-pixel format
22		* to our internal noninterleaved, one-plane-per-component format.
23		* The input buffer is therefore three times as wide as the output buffer.
24		*
25		* A starting row offset is provided only for the output buffer. The caller
26		* can easily adjust the passed input_buf value to accommodate any row
27		* offset required on that side.
28		*/
29
30		INLINE
31		LOCAL(void)
32		rgb_ycc_convert_internal(j_compress_ptr cinfo, JSAMPARRAY input_buf,
33		JSAMPIMAGE output_buf, JDIMENSION output_row,
34		int num_rows)
35	0	{
36	0	my_cconvert_ptr cconvert = (my_cconvert_ptr)cinfo->cconvert;
37	0	register int r, g, b;
38	0	register JLONG *ctab = cconvert->rgb_ycc_tab;
39	0	register JSAMPROW inptr;
40	0	register JSAMPROW outptr0, outptr1, outptr2;
41	0	register JDIMENSION col;
42	0	JDIMENSION num_cols = cinfo->image_width;
43
44	0	while (--num_rows >= 0) {
45	0	inptr = *input_buf++;
46	0	outptr0 = output_buf[0][output_row];
47	0	outptr1 = output_buf[1][output_row];
48	0	outptr2 = output_buf[2][output_row];
49	0	output_row++;
50	0	for (col = 0; col < num_cols; col++) {
51	0	r = RANGE_LIMIT(inptr[RGB_RED]);
52	0	g = RANGE_LIMIT(inptr[RGB_GREEN]);
53	0	b = RANGE_LIMIT(inptr[RGB_BLUE]);
54	0	inptr += RGB_PIXELSIZE;
55		/* If the inputs are 0..MAXJSAMPLE, the outputs of these equations
56		* must be too; we do not need an explicit range-limiting operation.
57		* Hence the value being shifted is never negative, and we don't
58		* need the general RIGHT_SHIFT macro.
59		*/
60		/* Y */
61	0	outptr0[col] = (JSAMPLE)((ctab[r + R_Y_OFF] + ctab[g + G_Y_OFF] +
62	0	ctab[b + B_Y_OFF]) >> SCALEBITS);
63		/* Cb */
64	0	outptr1[col] = (JSAMPLE)((ctab[r + R_CB_OFF] + ctab[g + G_CB_OFF] +
65	0	ctab[b + B_CB_OFF]) >> SCALEBITS);
66		/* Cr */
67	0	outptr2[col] = (JSAMPLE)((ctab[r + R_CR_OFF] + ctab[g + G_CR_OFF] +
68	0	ctab[b + B_CR_OFF]) >> SCALEBITS);
69	0	}
70	0	}
71	0	} Unexecuted instantiation: jccolor.c:extrgb_ycc_convert_internal Unexecuted instantiation: jccolor.c:extrgbx_ycc_convert_internal Unexecuted instantiation: jccolor.c:extbgr_ycc_convert_internal Unexecuted instantiation: jccolor.c:extbgrx_ycc_convert_internal Unexecuted instantiation: jccolor.c:extxbgr_ycc_convert_internal Unexecuted instantiation: jccolor.c:extxrgb_ycc_convert_internal Unexecuted instantiation: jccolor.c:rgb_ycc_convert_internal
72
73
74		/************** Cases other than RGB -> YCbCr ************/
75
76
77		/*
78		* Convert some rows of samples to the JPEG colorspace.
79		* This version handles RGB->grayscale conversion, which is the same
80		* as the RGB->Y portion of RGB->YCbCr.
81		* We assume rgb_ycc_start has been called (we only use the Y tables).
82		*/
83
84		INLINE
85		LOCAL(void)
86		rgb_gray_convert_internal(j_compress_ptr cinfo, JSAMPARRAY input_buf,
87		JSAMPIMAGE output_buf, JDIMENSION output_row,
88		int num_rows)
89	0	{
90	0	my_cconvert_ptr cconvert = (my_cconvert_ptr)cinfo->cconvert;
91	0	register int r, g, b;
92	0	register JLONG *ctab = cconvert->rgb_ycc_tab;
93	0	register JSAMPROW inptr;
94	0	register JSAMPROW outptr;
95	0	register JDIMENSION col;
96	0	JDIMENSION num_cols = cinfo->image_width;
97
98	0	while (--num_rows >= 0) {
99	0	inptr = *input_buf++;
100	0	outptr = output_buf[0][output_row];
101	0	output_row++;
102	0	for (col = 0; col < num_cols; col++) {
103	0	r = RANGE_LIMIT(inptr[RGB_RED]);
104	0	g = RANGE_LIMIT(inptr[RGB_GREEN]);
105	0	b = RANGE_LIMIT(inptr[RGB_BLUE]);
106	0	inptr += RGB_PIXELSIZE;
107		/* Y */
108	0	outptr[col] = (JSAMPLE)((ctab[r + R_Y_OFF] + ctab[g + G_Y_OFF] +
109	0	ctab[b + B_Y_OFF]) >> SCALEBITS);
110	0	}
111	0	}
112	0	} Unexecuted instantiation: jccolor.c:extrgb_gray_convert_internal Unexecuted instantiation: jccolor.c:extrgbx_gray_convert_internal Unexecuted instantiation: jccolor.c:extbgr_gray_convert_internal Unexecuted instantiation: jccolor.c:extbgrx_gray_convert_internal Unexecuted instantiation: jccolor.c:extxbgr_gray_convert_internal Unexecuted instantiation: jccolor.c:extxrgb_gray_convert_internal Unexecuted instantiation: jccolor.c:rgb_gray_convert_internal
113
114
115		/*
116		* Convert some rows of samples to the JPEG colorspace.
117		* This version handles extended RGB->plain RGB conversion
118		*/
119
120		INLINE
121		LOCAL(void)
122		rgb_rgb_convert_internal(j_compress_ptr cinfo, JSAMPARRAY input_buf,
123		JSAMPIMAGE output_buf, JDIMENSION output_row,
124		int num_rows)
125	0	{
126	0	register JSAMPROW inptr;
127	0	register JSAMPROW outptr0, outptr1, outptr2;
128	0	register JDIMENSION col;
129	0	JDIMENSION num_cols = cinfo->image_width;
130
131	0	while (--num_rows >= 0) {
132	0	inptr = *input_buf++;
133	0	outptr0 = output_buf[0][output_row];
134	0	outptr1 = output_buf[1][output_row];
135	0	outptr2 = output_buf[2][output_row];
136	0	output_row++;
137	0	for (col = 0; col < num_cols; col++) {
138	0	outptr0[col] = inptr[RGB_RED];
139	0	outptr1[col] = inptr[RGB_GREEN];
140	0	outptr2[col] = inptr[RGB_BLUE];
141	0	inptr += RGB_PIXELSIZE;
142	0	}
143	0	}
144	0	} Unexecuted instantiation: jccolor.c:extrgb_rgb_convert_internal Unexecuted instantiation: jccolor.c:extrgbx_rgb_convert_internal Unexecuted instantiation: jccolor.c:extbgr_rgb_convert_internal Unexecuted instantiation: jccolor.c:extbgrx_rgb_convert_internal Unexecuted instantiation: jccolor.c:extxbgr_rgb_convert_internal Unexecuted instantiation: jccolor.c:extxrgb_rgb_convert_internal Unexecuted instantiation: jccolor.c:rgb_rgb_convert_internal

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Created: 2023-06-07 06:03