/* ICC color mapping linearity check. */
int
gx_cspace_is_linear_ICC(const gs_color_space *cs, const gs_gstate * pgs,
gx_device *dev,
const gs_client_color *c0, const gs_client_color *c1,
const gs_client_color *c2, const gs_client_color *c3,
float smoothness, gsicc_link_t *icclink)
{
/* Assuming 2 <= nc <= 4. We don't need other cases. */
/* With nc == 4 assuming a convex plain quadrangle in the client color space. */
int code;
/* Do a quick check if we are in a halftone situation. If yes,
then we should not be doing this linear check */
if (gx_device_must_halftone(dev)) return 0;
if (icclink->is_identity) return 1; /* Transform is identity, linear! */
if (dev->color_info.separable_and_linear != GX_CINFO_SEP_LIN)
return_error(gs_error_rangecheck);
if (c2 == NULL)
return gx_icc_is_linear_in_line(cs, pgs, dev, c0, c1, smoothness, icclink);
code = gx_icc_is_linear_in_triangle(cs, pgs, dev, c0, c1, c2,
smoothness, icclink);
if (code <= 0)
return code;
if (c3 == NULL)
return 1;
return gx_icc_is_linear_in_triangle(cs, pgs, dev, c1, c2, c3,
smoothness, icclink);
}
/* Set overprint information for a DeviceN color space */
static int
gx_set_overprint_DeviceN(const gs_color_space * pcs, gs_state * pgs)
{
gs_devicen_color_map * pcmap = &pgs->color_component_map;
int code;
gx_device *dev = pgs->device;
cmm_dev_profile_t *dev_profile;
dev_proc(dev, get_profile)(dev, &(dev_profile));
/* It is possible that the color map information in the graphic state
is not current due to save/restore and or if we are coming from
a color space that is inside a PatternType 2 */
code = check_DeviceN_component_names(pcs, pgs);
if (code < 0)
return code;
if (pcmap->use_alt_cspace) {
const gs_color_space_type* base_type = pcs->base_space->type;
if (dev_profile->sim_overprint &&
dev->color_info.polarity == GX_CINFO_POLARITY_SUBTRACTIVE &&
!gx_device_must_halftone(dev))
return gx_simulated_set_overprint(pcs->base_space, pgs);
else {
/* If the base space is DeviceCMYK, handle overprint as DeviceCMYK */
if ( base_type->index == gs_color_space_index_DeviceCMYK )
return base_type->set_overprint( pcs->base_space, pgs );
else
return gx_spot_colors_set_overprint( pcs->base_space, pgs);
}
}
else {
gs_overprint_params_t params;
if ((params.retain_any_comps = pgs->overprint)) {
int i, ncomps = pcs->params.device_n.num_components;
params.retain_spot_comps = false;
params.drawn_comps = 0;
params.k_value = 0;
/* We should not have to blend if we don't need the alternate tint transform */
params.blendspot = false;
for (i = 0; i < ncomps; i++) {
int mcomp = pcmap->color_map[i];
if (mcomp >= 0)
gs_overprint_set_drawn_comp( params.drawn_comps, mcomp);
}
}
pgs->effective_overprint_mode = 0;
return gs_state_update_overprint(pgs, ¶ms);
}
}
int
gxht_thresh_image_init(gx_image_enum *penum)
{
int code = 0;
fixed ox, oy;
int temp;
int dev_width, max_height;
int spp_out;
int k;
gx_ht_order *d_order;
if (gx_device_must_halftone(penum->dev)) {
if (penum->pis != NULL && penum->pis->dev_ht != NULL) {
for (k = 0; k < penum->pis->dev_ht->num_comp; k++) {
d_order = &(penum->pis->dev_ht->components[k].corder);
code = gx_ht_construct_threshold(d_order, penum->dev,
penum->pis, k);
if (code < 0 ) {
return gs_rethrow(code, "threshold creation failed");
}
}
} else {
return -1;
}
}
spp_out = penum->dev->color_info.num_components;
/* If the image is landscaped then we want to maintain a buffer
that is sufficiently large so that we can hold a byte
of halftoned data along the column. This way we avoid doing
multiple writes into the same position over and over.
The size of the buffer we need depends upon the bitdepth of
the output device, the number of device coloranants and the
number of colorants in the source space. Note we will
need to eventually consider multi-level halftone case
here too. For now, to make use of the SSE2 stuff, we would
like to have 16 bytes of data to process at a time. So we
will collect the columns of data in a buffer that is 16 wide.
We will also keep track of the widths of each column. When
the total width count reaches 16, we will create our
threshold array and apply it. We may have one column that is
buffered between calls in this case. Also if a call is made
with h=0 we will flush the buffer as we are at the end of the
data. */
if (penum->posture == image_landscape) {
int col_length =
fixed2int_var_rounded(any_abs(penum->x_extent.y)) * spp_out;
ox = dda_current(penum->dda.pixel0.x);
oy = dda_current(penum->dda.pixel0.y);
temp = (int) ceil((float) col_length/16.0);
penum->line_size = temp * 16; /* The stride */
/* Now we need at most 16 of these */
penum->line = gs_alloc_bytes(penum->memory,
16 * penum->line_size + 16,
"gxht_thresh");
/* Same with this */
penum->thresh_buffer = gs_alloc_bytes(penum->memory,
penum->line_size * 16 + 16,
"gxht_thresh");
/* That maps into 2 bytes of Halftone data */
penum->ht_buffer = gs_alloc_bytes(penum->memory,
penum->line_size * 2,
"gxht_thresh");
penum->ht_stride = penum->line_size;
if (penum->line == NULL || penum->thresh_buffer == NULL
|| penum->ht_buffer == NULL)
return -1;
penum->ht_landscape.count = 0;
penum->ht_landscape.num_contones = 0;
if (penum->y_extent.x < 0) {
/* Going right to left */
penum->ht_landscape.curr_pos = 15;
penum->ht_landscape.index = -1;
} else {
/* Going left to right */
penum->ht_landscape.curr_pos = 0;
penum->ht_landscape.index = 1;
}
if (penum->x_extent.y < 0) {
penum->ht_landscape.flipy = true;
penum->ht_landscape.y_pos =
fixed2int_pixround_perfect(dda_current(penum->dda.pixel0.y) + penum->x_extent.y);
} else {
penum->ht_landscape.flipy = false;
penum->ht_landscape.y_pos =
fixed2int_pixround_perfect(dda_current(penum->dda.pixel0.y));
}
memset(&(penum->ht_landscape.widths[0]), 0, sizeof(int)*16);
penum->ht_landscape.offset_set = false;
penum->ht_offset_bits = 0; /* Will get set in call to render */
if (code >= 0) {
#if defined(DEBUG) || defined(PACIFY_VALGRIND)
memset(penum->line, 0, 16 * penum->line_size + 16);
memset(penum->ht_buffer, 0, penum->line_size * 2);
memset(penum->thresh_buffer, 0, 16 * penum->line_size + 16);
#endif
}
} else {
/* In the portrait case we allocate a single line buffer
in device width, a threshold buffer of the same size
and possibly wider and the buffer for the halftoned
bits. We have to do a bit of work to enable 16 byte
boundary after an offset to ensure that we can make use
of the SSE2 operations for thresholding. We do the
allocations now to avoid doing them with every line */
/* Initialize the ht_landscape stuff to zero */
memset(&(penum->ht_landscape), 0, sizeof(ht_landscape_info_t));
ox = dda_current(penum->dda.pixel0.x);
oy = dda_current(penum->dda.pixel0.y);
dev_width =
(int) fabs((long) fixed2long_pixround(ox + penum->x_extent.x) -
fixed2long_pixround(ox));
/* Get the bit position so that we can do a copy_mono for
the left remainder and then 16 bit aligned copies for the
rest. The right remainder will be OK as it will land in
the MSBit positions. Note the #define chunk bits16 in
gdevm1.c. Allow also for a 15 sample over run.
*/
penum->ht_offset_bits = (-fixed2int_var_pixround(ox)) & 15;
if (penum->ht_offset_bits > 0) {
penum->ht_stride = ((7 + (dev_width + 4)) / 8) +
ARCH_SIZEOF_LONG;
} else {
penum->ht_stride = ((7 + (dev_width + 2)) / 8) +
ARCH_SIZEOF_LONG;
}
/* We want to figure out the maximum height that we may
have in taking a single source row and going to device
space */
max_height = (int) ceil(fixed2float(any_abs(penum->dst_height)) /
(float) penum->Height);
penum->ht_buffer = gs_alloc_bytes(penum->memory,
penum->ht_stride * max_height * spp_out,
"gxht_thresh");
/* We want to have 128 bit alignement for our contone and
threshold strips so that we can use SSE operations
in the threshold operation. Add in a minor buffer and offset
to ensure this. If gs_alloc_bytes provides at least 16
bit alignment so we may need to move 14 bytes. However, the
HT process is split in two operations. One that involves
the HT of a left remainder and the rest which ensures that
we pack in the HT data in the bits with no skew for a fast
copy into the gdevm1 device (16 bit copies). So, we
need to account for those pixels which occur first and which
are NOT aligned for the contone buffer. After we offset
by this remainder portion we should be 128 bit aligned.
Also allow a 15 sample over run during the execution. */
temp = (int) ceil((float) ((dev_width + 15.0) + 15.0)/16.0);
penum->line_size = temp * 16; /* The stride */
penum->line = gs_alloc_bytes(penum->memory, penum->line_size * spp_out,
"gxht_thresh");
penum->thresh_buffer = gs_alloc_bytes(penum->memory,
penum->line_size * max_height * spp_out,
"gxht_thresh");
if (penum->line == NULL || penum->thresh_buffer == NULL ||
penum->ht_buffer == NULL) {
return -1;
} else {
#if defined(DEBUG) || defined(PACIFY_VALGRIND)
memset(penum->line, 0, penum->line_size * spp_out);
memset(penum->ht_buffer, 0,
penum->ht_stride * max_height * spp_out);
memset(penum->thresh_buffer, 0,
penum->line_size * max_height * spp_out);
#endif
}
}
/* Precompute values needed for rasterizing. */
penum->dxx = float2fixed(penum->matrix.xx + fixed2float(fixed_epsilon) / 2);
return code;
}
