//设置默认参数
void jpeg_set_default(jpeg_compress_info *cinfo)
{
cinfo->precision=8;//采样精度8
cinfo->in_color_space=JCS_RGB;//色彩空间
cinfo->quality=0.2f;//图像质量,值越小质量越好
//初始化元件颜色为YCbCr彩色
cinfo->num_comp=3;//元件数量为3
SET_COMP(cinfo->comp[0],1,2,2,0,0,0);//
SET_COMP(cinfo->comp[1],2,1,1,1,1,1);//
SET_COMP(cinfo->comp[2],3,1,1,1,1,1);//
jint_std_quant_tables(cinfo);//设置标准量化表
jint_std_huff_tables(cinfo);//设置标准huffman表
jpeg_calc_value(cinfo);//其它变量
}
jpeg_set_colorspace (j_compress_ptr cinfo, J_COLOR_SPACE colorspace)
{
jpeg_component_info * compptr;
int ci;
#define SET_COMP(index,id,hsamp,vsamp,quant,dctbl,actbl) \
(compptr = &cinfo->comp_info[index], \
compptr->component_id = (id), \
compptr->h_samp_factor = (hsamp), \
compptr->v_samp_factor = (vsamp), \
compptr->quant_tbl_no = (quant), \
compptr->dc_tbl_no = (dctbl), \
compptr->ac_tbl_no = (actbl) )
/* Safety check to ensure start_compress not called yet. */
if (cinfo->global_state != CSTATE_START)
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
/* For all colorspaces, we use Q and Huff tables 0 for luminance components,
* tables 1 for chrominance components.
*/
cinfo->jpeg_color_space = colorspace;
cinfo->write_JFIF_header = FALSE; /* No marker for non-JFIF colorspaces */
cinfo->write_Adobe_marker = FALSE; /* write no Adobe marker by default */
switch (colorspace) {
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);
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(1, 0x47 /* 'G' */, 1,1, 0, 0,0);
SET_COMP(2, 0x42 /* 'B' */, 1,1, 0, 0,0);
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);
break;
case JCS_CMYK:
cinfo->write_Adobe_marker = TRUE; /* write Adobe marker to flag CMYK */
cinfo->num_components = 4;
SET_COMP(0, 0x43 /* 'C' */, 1,1, 0, 0,0);
SET_COMP(1, 0x4D /* 'M' */, 1,1, 0, 0,0);
SET_COMP(2, 0x59 /* 'Y' */, 1,1, 0, 0,0);
SET_COMP(3, 0x4B /* 'K' */, 1,1, 0, 0,0);
break;
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);
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);
}
break;
default:
ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
}
}
/* TODO: the whole purpose of fastforward_jpeg_stream_state(),
(as well as add_huff_table()/add_huff_tables() above), is to wind
the state of the jpeg stream forward, since the incoming
data is headerless. On hide-sight, it might be cleaner
and more future-proof against changes in libjpeg
to construct a made-up header, read it then switch data stream. */
static void
fastforward_jpeg_stream_state(jpeg_decompress_data * jddp,
stream_DCT_state * ss, px_state_t * pxs)
{
px_vendor_state_t *v_state = pxs->vendor_state;
j_decompress_ptr cinfo = &jddp->dinfo;
int i;
int j, qcount = 0;
jpeg_component_info *compptr;
int factor = ((v_state->color_space == eGraySub) ? 8 : 1);
extern const int jpeg_natural_order[];
if (cinfo->comp_info == NULL)
cinfo->comp_info = (jpeg_component_info *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo,
JPOOL_PERMANENT,
MAX_COMPONENTS *
sizeof(jpeg_component_info));
/* default_decompress_parms() starts */
if (v_state->color_space == eGraySub) {
cinfo->jpeg_color_space = JCS_GRAYSCALE;
cinfo->out_color_space = JCS_GRAYSCALE;
} else {
cinfo->jpeg_color_space = JCS_YCbCr;
cinfo->out_color_space = JCS_YCbCr;
}
cinfo->scale_num = 8;
cinfo->scale_denom = 8;
cinfo->output_gamma = 1.0;
cinfo->buffered_image = FALSE;
cinfo->raw_data_out = FALSE;
cinfo->dct_method = JDCT_DEFAULT;
cinfo->do_fancy_upsampling = TRUE;
cinfo->do_block_smoothing = TRUE;
cinfo->quantize_colors = FALSE;
/* */
cinfo->dither_mode = JDITHER_FS;
/* */
cinfo->two_pass_quantize = 1;
/* */
cinfo->desired_number_of_colors = 256;
/* */
cinfo->enable_1pass_quant = 0;
cinfo->enable_external_quant = 0;
cinfo->enable_2pass_quant = FALSE;
/* default_decompress_parms() ends */
std_huff_tables(cinfo);
/* get_soi begins */
for (i = 0; i < NUM_ARITH_TBLS; i++) {
cinfo->arith_dc_L[i] = 0;
cinfo->arith_dc_U[i] = 1;
cinfo->arith_ac_K[i] = 5;
}
cinfo->restart_interval = 0;
cinfo->CCIR601_sampling = FALSE;
/* */
cinfo->JFIF_major_version = 1; /* Default JFIF version = 1.01 */
cinfo->JFIF_minor_version = 1;
cinfo->density_unit = 0; /* Pixel size is unknown by default */
cinfo->X_density = 1; /* Pixel aspect ratio is square by default */
cinfo->Y_density = 1;
/* get_soi ends */
/* get_sof */
cinfo->is_baseline = 1;
cinfo->progressive_mode = FALSE;
cinfo->arith_code = FALSE;
cinfo->data_precision = BITS_IN_JSAMPLE;
if (v_state->color_space == eGraySub)
cinfo->num_components = 1;
else
cinfo->num_components = 3;
cinfo->image_width = v_state->SourceWidth;
cinfo->image_height = v_state->BlockHeight;
for (i = 0; i < cinfo->num_components; i++) {
if (cinfo->quant_tbl_ptrs[i] == NULL)
cinfo->quant_tbl_ptrs[i] =
jpeg_alloc_quant_table((j_common_ptr) cinfo);
for (j = 0; j < 64; j++)
cinfo->quant_tbl_ptrs[i]->quantval[j] =
v_state->qvalues[qcount++];
}
#define SET_COMP(index,id,hsamp,vsamp,quant,dctbl,actbl) \
(compptr = &cinfo->comp_info[index], \
compptr->component_id = (id), \
compptr->h_samp_factor = (hsamp), \
compptr->v_samp_factor = (vsamp), \
compptr->quant_tbl_no = (quant), \
compptr->dc_tbl_no = (dctbl), \
compptr->ac_tbl_no = (actbl), \
compptr->DCT_h_scaled_size = 8, \
compptr->DCT_v_scaled_size = 8, \
compptr->width_in_blocks = cinfo->image_width/factor, \
compptr->height_in_blocks = cinfo->image_height/factor, \
compptr->quant_table = cinfo->quant_tbl_ptrs[index], \
compptr->component_index = index, \
compptr->component_needed = TRUE, \
compptr->downsampled_width = cinfo->image_width, \
compptr->downsampled_height = cinfo->image_height)
SET_COMP(0, 1, 1, 1, 0, 0, 0); /* not default! */
if (v_state->color_space != eGraySub) {
SET_COMP(1, 2, 1, 1, 1, 1, 1);
SET_COMP(2, 3, 1, 1, 1, 1, 1);
}
/* end_sof */
cinfo->rec_outbuf_height = 1;
if (v_state->color_space == eGraySub) {
cinfo->out_color_components = 1;
cinfo->output_components = 1;
} else {
cinfo->out_color_components = 3;
cinfo->output_components = 3;
}
cinfo->global_state = DSTATE_READY;
/* no SOS markers, so we just do this by hand - mostly from get_sos() */
cinfo->cur_comp_info[0] = &cinfo->comp_info[0];
cinfo->comp_info[0].dc_tbl_no = 0;
cinfo->comp_info[0].ac_tbl_no = 0;
if (v_state->color_space != eGraySub) {
cinfo->cur_comp_info[1] = &cinfo->comp_info[1];
cinfo->comp_info[1].dc_tbl_no = 1;
cinfo->comp_info[1].ac_tbl_no = 1;
cinfo->cur_comp_info[2] = &cinfo->comp_info[2];
cinfo->comp_info[2].dc_tbl_no = 1;
cinfo->comp_info[2].ac_tbl_no = 1;
}
cinfo->Ss = 0;
cinfo->Se = 63;
cinfo->Ah = 0;
cinfo->Al = 0;
/* initial_setup() */
cinfo->input_scan_number = 1;
cinfo->block_size = DCTSIZE;
cinfo->natural_order = jpeg_natural_order;
cinfo->lim_Se = DCTSIZE2 - 1;
cinfo->min_DCT_h_scaled_size = 8;
cinfo->min_DCT_v_scaled_size = 8;
cinfo->max_h_samp_factor = 1;
cinfo->max_v_samp_factor = 1;
if (v_state->color_space == eGraySub)
cinfo->comps_in_scan = 1;
else
cinfo->comps_in_scan = 3;
/* */
jpeg_core_output_dimensions(cinfo);
cinfo->total_iMCU_rows = 16;
ss->phase = 2; /* fast forward to phase 2, on to start_decompress */
}
jpeg_set_colorspace (j_compress_ptr cinfo, J_COLOR_SPACE colorspace)
{
jpeg_component_info * compptr;
int ci;
#define SET_COMP(index,id,hsamp,vsamp,quant,dctbl,actbl) \
(compptr = &cinfo->comp_info[index], \
compptr->component_id = (id), \
compptr->h_samp_factor = (hsamp), \
compptr->v_samp_factor = (vsamp), \
compptr->quant_tbl_no = (quant), \
compptr->dc_tbl_no = (dctbl), \
compptr->ac_tbl_no = (actbl) )
/* Safety check to ensure start_compress not called yet. */
if (cinfo->global_state != CSTATE_START)
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
/* For all colorspaces, we use Q and Huff tables 0 for luminance components,
* tables 1 for chrominance components.
*/
cinfo->jpeg_color_space = colorspace;
cinfo->write_JFIF_header = FALSE; /* No marker for non-JFIF colorspaces */
cinfo->write_Adobe_marker = FALSE; /* write no Adobe marker by default */
/* Fix the bit width stuff here, by now cinfo->data_precision should be set */
if (2 > cinfo->data_precision || cinfo->data_precision > 16)
ERREXIT1(cinfo, JERR_BAD_PRECISION, cinfo->data_precision);
if (!cinfo->lossless) {
if (cinfo->data_precision <=8) {
if (cinfo->data_precision !=8) {
WARNMS2(cinfo, JWRN_JPEG_PRECISION_CHANGED, cinfo->data_precision, 8);
cinfo->data_precision = 8;
}
} else if (cinfo->data_precision != 12) {
WARNMS2(cinfo, JWRN_JPEG_PRECISION_CHANGED, cinfo->data_precision, 12);
cinfo->data_precision = 12;
}
}
cinfo->maxjsample = (1 << cinfo->data_precision) - 1;
cinfo->centerjsample = (cinfo->maxjsample + 1)/2;
#ifdef HAVE_GETJSAMPLE_MASK
cinfo->maskjsample = cinfo->maxjsample;
#endif
/* 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;
switch (colorspace) {
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);
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(1, 0x47 /* 'G' */, 1,1, 0, 0,0);
SET_COMP(2, 0x42 /* 'B' */, 1,1, 0, 0,0);
break;
case JCS_YCbCr:
cinfo->write_JFIF_header = TRUE; /* Write a JFIF marker */
cinfo->num_components = 3;
/* JFIF specifies component IDs 1,2,3 */
if (cinfo->lossless) {
SET_COMP(0, 1, 1,1, 0, 0,0);
SET_COMP(1, 2, 1,1, 1, 1,1);
SET_COMP(2, 3, 1,1, 1, 1,1);
} else { /* lossy */
/* 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);
}
break;
case JCS_CMYK:
cinfo->write_Adobe_marker = TRUE; /* write Adobe marker to flag CMYK */
cinfo->num_components = 4;
SET_COMP(0, 0x43 /* 'C' */, 1,1, 0, 0,0);
SET_COMP(1, 0x4D /* 'M' */, 1,1, 0, 0,0);
SET_COMP(2, 0x59 /* 'Y' */, 1,1, 0, 0,0);
SET_COMP(3, 0x4B /* 'K' */, 1,1, 0, 0,0);
break;
case JCS_YCCK:
cinfo->write_Adobe_marker = TRUE; /* write Adobe marker to flag YCCK */
cinfo->num_components = 4;
if (cinfo->lossless) {
SET_COMP(0, 1, 1,1, 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, 1,1, 0, 0,0);
} else { /* lossy */
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);
}
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);
}
break;
default:
ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
}
}
jpeg_set_colorspace (j_compress_ptr cinfo, J_COLOR_SPACE colorspace)
{
jpeg_component_info * compptr;
int ci;
#define SET_COMP(index,id,hsamp,vsamp,quant,dctbl,actbl) \
(compptr = &cinfo->comp_info[index], \
compptr->component_id = (id), \
compptr->h_samp_factor = (hsamp), \
compptr->v_samp_factor = (vsamp), \
compptr->quant_tbl_no = (quant), \
compptr->dc_tbl_no = (dctbl), \
compptr->ac_tbl_no = (actbl) )
if (cinfo->global_state != CSTATE_START)
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
cinfo->jpeg_color_space = colorspace;
cinfo->write_JFIF_header = FALSE;
cinfo->write_Adobe_marker = FALSE;
switch (colorspace) {
case JCS_GRAYSCALE:
cinfo->write_JFIF_header = TRUE;
cinfo->num_components = 1;
SET_COMP(0, 1, 1,1, 0, 0,0);
break;
case JCS_RGB:
cinfo->write_Adobe_marker = TRUE;
cinfo->num_components = 3;
SET_COMP(0, 0x52 , 1,1, 0, 0,0);
SET_COMP(1, 0x47 , 1,1, 0, 0,0);
SET_COMP(2, 0x42 , 1,1, 0, 0,0);
break;
case JCS_YCbCr:
cinfo->write_JFIF_header = TRUE;
cinfo->num_components = 3;
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);
break;
case JCS_CMYK:
cinfo->write_Adobe_marker = TRUE;
cinfo->num_components = 4;
SET_COMP(0, 0x43 , 1,1, 0, 0,0);
SET_COMP(1, 0x4D , 1,1, 0, 0,0);
SET_COMP(2, 0x59 , 1,1, 0, 0,0);
SET_COMP(3, 0x4B , 1,1, 0, 0,0);
break;
case JCS_YCCK:
cinfo->write_Adobe_marker = TRUE;
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);
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);
}
break;
default:
ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
}
}
jpeg_set_colorspace (j_compress_ptr cinfo, J_COLOR_SPACE colorspace)
{
jpeg_component_info * compptr;
int ci;
#define SET_COMP(index,id,hsamp,vsamp,quant,dctbl,actbl) \
(compptr = &cinfo->comp_info[index], \
compptr->component_id = (id), \
compptr->h_samp_factor = (hsamp), \
compptr->v_samp_factor = (vsamp), \
compptr->quant_tbl_no = (quant), \
compptr->dc_tbl_no = (dctbl), \
compptr->ac_tbl_no = (actbl) )
/* Safety check to ensure start_compress not called yet. */
if (cinfo->global_state != CSTATE_START)
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
/* For all colorspaces, we use Q and Huff tables 0 for luminance components,
* tables 1 for chrominance components.
*/
cinfo->jpeg_color_space = colorspace;
cinfo->write_JFIF_header = FALSE; /* No marker for non-JFIF colorspaces */
cinfo->write_Adobe_marker = FALSE; /* write no Adobe marker by default */
switch (colorspace) {
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);
break;
#ifdef NIFTY
case JCS_YCC:
cinfo->write_JFIF_header = FALSE; /* don't write a JFIF marker. */
cinfo->num_components = 3;
/* NOTE:
these component numbers MUST BE UNIQUE!!!
so YCC was changed to YCc.
And it wasn't an easy bug to find, either!!!! rgvb. */
SET_COMP(0, 0x59 /* 'Y' */, 2,2, 0, 0,0); /* Photo YCC */
SET_COMP(1, 0x43 /* 'C' */, 1,1, 1, 1,1);
SET_COMP(2, 0x63 /* 'c' */, 1,1, 1, 1,1);
break;
case JCS_YCCA:
cinfo->write_JFIF_header = FALSE; /* don't write a JFIF marker. */
cinfo->num_components = 4;
/* NOTE:
these component numbers MUST BE UNIQUE!!!
so YCC was changed to YCc.
And it wasn't an easy bug to find, either!!!! rgvb. */
SET_COMP(0, 0x59 /* 'Y' */, 2,2, 0, 0,0); /* PhotoYCC-Alpha */
SET_COMP(1, 0x43 /* 'C' */, 1,1, 1, 1,1);
SET_COMP(2, 0x63 /* 'c' */, 1,1, 1, 1,1);
SET_COMP(3, 0x41 /* 'A' */, 2,2, 0, 0,0);
break;
case JCS_YCbCrA:
cinfo->write_JFIF_header = FALSE; /* don't write a JFIF marker. */
cinfo->num_components = 4;
SET_COMP(0, 1, 2,2, 0, 0,0); /* YCbCr-Alpha */
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);
break;
case JCS_RGBA:
cinfo->write_JFIF_header = FALSE; /* don't write a JFIF marker. */
cinfo->num_components = 4;
SET_COMP(0, 0x52 /* 'R' */, 1,1, 0, 0,0); /* RGB-Alpha Straight through */
SET_COMP(1, 0x47 /* 'G' */, 1,1, 0, 0,0);
SET_COMP(2, 0x42 /* 'B' */, 1,1, 0, 0,0);
SET_COMP(3, 0x41 /* 'A' */, 1,1, 0, 0,0);
break;
case JCS_YCbCrA_LEGACY:
cinfo->write_JFIF_header = FALSE; /* don't write a JFIF marker. */
cinfo->num_components = 4;
SET_COMP(0, 1, 2,2, 0, 0,0); /* YCbCr-Alpha */
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);
break;
/* JCS_RGBA_LEGACY should NEVER appear as a JPEG colorspace. It
is only valid as an input color on compression and an output
color on decompression. */
case JCS_RGBA_LEGACY:
ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
break;
#endif
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(1, 0x47 /* 'G' */, 1,1, 0, 0,0);
SET_COMP(2, 0x42 /* 'B' */, 1,1, 0, 0,0);
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);
break;
case JCS_CMYK:
cinfo->write_Adobe_marker = TRUE; /* write Adobe marker to flag CMYK */
cinfo->num_components = 4;
SET_COMP(0, 0x43 /* 'C' */, 1,1, 0, 0,0);
SET_COMP(1, 0x4D /* 'M' */, 1,1, 0, 0,0);
SET_COMP(2, 0x59 /* 'Y' */, 1,1, 0, 0,0);
SET_COMP(3, 0x4B /* 'K' */, 1,1, 0, 0,0);
break;
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);
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);
}
break;
default:
ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
}
}