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|
/* Copyright (C) 2001-2012 Artifex Software, Inc.
All Rights Reserved.
This software is provided AS-IS with no warranty, either express or
implied.
This software is distributed under license and may not be copied,
modified or distributed except as expressly authorized under the terms
of the license contained in the file LICENSE in this distribution.
Refer to licensing information at http://www.artifex.com or contact
Artifex Software, Inc., 7 Mt. Lassen Drive - Suite A-134, San Rafael,
CA 94903, U.S.A., +1(415)492-9861, for further information.
*/
/* Color image rendering */
#include "gx.h"
#include "memory_.h"
#include "gpcheck.h"
#include "gserrors.h"
#include "gxfixed.h"
#include "gxfrac.h"
#include "gxarith.h"
#include "gxmatrix.h"
#include "gsccolor.h"
#include "gspaint.h"
#include "gzstate.h"
#include "gxdevice.h"
#include "gxcmap.h"
#include "gxdcconv.h"
#include "gxdcolor.h"
#include "gxistate.h"
#include "gxdevmem.h"
#include "gxcpath.h"
#include "gximage.h"
#include "gsicc.h"
#include "gsicc_cache.h"
#include "gsicc_cms.h"
#include "gxcie.h"
#include "gscie.h"
#include "gzht.h"
#include "gxht_thresh.h"
#include "gxdevsop.h"
typedef union {
byte v[GS_IMAGE_MAX_COLOR_COMPONENTS];
#define BYTES_PER_BITS32 4
#define BITS32_PER_COLOR_SAMPLES\
((GS_IMAGE_MAX_COLOR_COMPONENTS + BYTES_PER_BITS32 - 1) / BYTES_PER_BITS32)
bits32 all[BITS32_PER_COLOR_SAMPLES]; /* for fast comparison */
} color_samples;
/* ------ Strategy procedure ------ */
/* Check the prototype. */
iclass_proc(gs_image_class_4_color);
static irender_proc(image_render_color_DeviceN);
static irender_proc(image_render_color_icc);
static irender_proc(image_render_color_thresh);
irender_proc_t
gs_image_class_4_color(gx_image_enum * penum)
{
bool std_cmap_procs;
int code;
bool use_fast_thresh = false;
bool is_planar_dev = false;
if (penum->use_mask_color) {
/*
* Scale the mask colors to match the scaling of each sample to
* a full byte, and set up the quick-filter parameters.
*/
int i;
color_samples mask, test;
bool exact = penum->spp <= BYTES_PER_BITS32;
memset(&mask, 0, sizeof(mask));
memset(&test, 0, sizeof(test));
for (i = 0; i < penum->spp; ++i) {
byte v0, v1;
byte match = 0xff;
gx_image_scale_mask_colors(penum, i);
v0 = (byte)penum->mask_color.values[2 * i];
v1 = (byte)penum->mask_color.values[2 * i + 1];
while ((v0 & match) != (v1 & match))
match <<= 1;
mask.v[i] = match;
test.v[i] = v0 & match;
exact &= (v0 == match && (v1 | match) == 0xff);
}
penum->mask_color.mask = mask.all[0];
penum->mask_color.test = test.all[0];
penum->mask_color.exact = exact;
} else {
penum->mask_color.mask = 0;
penum->mask_color.test = ~0;
}
/* If the device has some unique color mapping procs due to its color space,
then we will need to use those and go through pixel by pixel instead
of blasting through buffers. This is true for example with many of
the color spaces for CUPs */
std_cmap_procs = gx_device_uses_std_cmap_procs(penum->dev, penum->pis);
if ( (gs_color_space_get_index(penum->pcs) == gs_color_space_index_DeviceN &&
penum->pcs->cmm_icc_profile_data == NULL) || penum->use_mask_color ||
!std_cmap_procs) {
return &image_render_color_DeviceN;
} else {
/* Set up the link now */
const gs_color_space *pcs;
gsicc_rendering_param_t rendering_params;
int k;
int src_num_comp = cs_num_components(penum->pcs);
int des_num_comp;
cmm_dev_profile_t *dev_profile;
code = dev_proc(penum->dev, get_profile)(penum->dev, &dev_profile);
des_num_comp = gsicc_get_device_profile_comps(dev_profile);
penum->icc_setup.need_decode = false;
/* Check if we need to do any decoding. If yes, then that will slow us down */
for (k = 0; k < src_num_comp; k++) {
if ( penum->map[k].decoding != sd_none ) {
penum->icc_setup.need_decode = true;
break;
}
}
/* Define the rendering intents */
rendering_params.black_point_comp = BP_ON;
rendering_params.graphics_type_tag = GS_IMAGE_TAG;
rendering_params.rendering_intent = penum->pis->renderingintent;
if (gs_color_space_is_PSCIE(penum->pcs) && penum->pcs->icc_equivalent != NULL) {
pcs = penum->pcs->icc_equivalent;
} else {
pcs = penum->pcs;
}
penum->icc_setup.is_lab = pcs->cmm_icc_profile_data->islab;
penum->icc_setup.must_halftone = gx_device_must_halftone(penum->dev);
penum->icc_setup.has_transfer =
gx_has_transfer(penum->pis, des_num_comp);
if (penum->icc_setup.is_lab) penum->icc_setup.need_decode = false;
if (penum->icc_link == NULL) {
penum->icc_link = gsicc_get_link(penum->pis, penum->dev, pcs, NULL,
&rendering_params, penum->memory);
}
/* PS CIE color spaces may have addition decoding that needs to
be performed to ensure that the range of 0 to 1 is provided
to the CMM since ICC profiles are restricted to that range
but the PS color spaces are not. */
if (gs_color_space_is_PSCIE(penum->pcs) &&
penum->pcs->icc_equivalent != NULL) {
/* We have a PS CIE space. Check the range */
if ( !check_cie_range(penum->pcs) ) {
/* It is not 0 to 1. We will be doing decode
plus an additional linear adjustment */
penum->cie_range = get_cie_range(penum->pcs);
}
}
if (gx_device_must_halftone(penum->dev) && use_fast_thresh &&
(penum->posture == image_portrait || penum->posture == image_landscape)
&& penum->image_parent_type == gs_image_type1) {
/* If num components is 1 or if we are going to CMYK planar device
then we will may use the thresholding if it is a halftone
device*/
is_planar_dev = dev_proc(penum->dev, dev_spec_op)(penum->dev,
gxdso_is_native_planar, NULL, 0);
if ((penum->dev->color_info.num_components == 1 || is_planar_dev) &&
penum->bps == 8 ) {
code = gxht_thresh_image_init(penum);
if (code == 0) {
return &image_render_color_thresh;
}
}
}
return &image_render_color_icc;
}
}
/* ------ Rendering procedures ------ */
/* Test whether a color is transparent. */
static bool
mask_color_matches(const byte *v, const gx_image_enum *penum,
int num_components)
{
int i;
for (i = num_components * 2, v += num_components - 1; (i -= 2) >= 0; --v)
if (*v < penum->mask_color.values[i] ||
*v > penum->mask_color.values[i + 1]
)
return false;
return true;
}
static inline float
rescale_input_color(gs_range range, float input)
{
return((input-range.rmin)/(range.rmax-range.rmin));
}
/* This one includes an extra adjustment for the CIE PS color space
non standard range */
static void
decode_row_cie(const gx_image_enum *penum, const byte *psrc, int spp, byte *pdes,
byte *bufend, gs_range range_array[])
{
byte *curr_pos = pdes;
int k;
float temp;
while ( curr_pos < bufend ) {
for ( k = 0; k < spp; k ++ ) {
switch ( penum->map[k].decoding ) {
case sd_none:
*curr_pos = *psrc;
break;
case sd_lookup:
temp = penum->map[k].decode_lookup[(*psrc) >> 4]*255.0;
temp = rescale_input_color(range_array[k], temp);
temp = temp*255;
if (temp > 255) temp = 255;
if (temp < 0 ) temp = 0;
*curr_pos = (unsigned char) temp;
break;
case sd_compute:
temp = penum->map[k].decode_base +
(*psrc) * penum->map[k].decode_factor;
temp = rescale_input_color(range_array[k], temp);
temp = temp*255;
if (temp > 255) temp = 255;
if (temp < 0 ) temp = 0;
*curr_pos = (unsigned char) temp;
default:
break;
}
curr_pos++;
psrc++;
}
}
}
static void
decode_row(const gx_image_enum *penum, const byte *psrc, int spp, byte *pdes,
byte *bufend)
{
byte *curr_pos = pdes;
int k;
float temp;
while ( curr_pos < bufend ) {
for ( k = 0; k < spp; k ++ ) {
switch ( penum->map[k].decoding ) {
case sd_none:
*curr_pos = *psrc;
break;
case sd_lookup:
temp = penum->map[k].decode_lookup[(*psrc) >> 4]*255.0;
if (temp > 255) temp = 255;
if (temp < 0 ) temp = 0;
*curr_pos = (unsigned char) temp;
break;
case sd_compute:
temp = penum->map[k].decode_base +
(*psrc) * penum->map[k].decode_factor;
temp *= 255;
if (temp > 255) temp = 255;
if (temp < 0 ) temp = 0;
*curr_pos = (unsigned char) temp;
default:
break;
}
curr_pos++;
psrc++;
}
}
}
/* Common code shared amongst the thresholding and non thresholding color image
renderers */
static int
image_color_icc_prep(gx_image_enum *penum_orig, const byte *psrc, uint w,
gx_device *dev, int *spp_cm_out, byte **psrc_cm,
byte **psrc_cm_start, byte **psrc_decode, byte **bufend,
bool planar_out)
{
const gx_image_enum *const penum = penum_orig; /* const within proc */
const gs_imager_state *pis = penum->pis;
bool need_decode = penum->icc_setup.need_decode;
gsicc_bufferdesc_t input_buff_desc;
gsicc_bufferdesc_t output_buff_desc;
int num_pixels, spp_cm;
int spp = penum->spp;
bool force_planar = false;
int num_des_comps;
int code;
cmm_dev_profile_t *dev_profile;
code = dev_proc(dev, get_profile)(dev, &dev_profile);
if (code < 0) return code;
num_des_comps = gsicc_get_device_profile_comps(dev_profile);
if (penum->icc_link == NULL) {
return gs_rethrow(-1, "ICC Link not created during image render color");
}
/* If the link is the identity, then we don't need to do any color
conversions except for potentially a decode. Planar out is a special
case. For now we let the CMM do the reorg into planar. We will want
to optimize this to do something special when we have the identity
transform for CM and going out to a planar CMYK device */
if (num_des_comps != 1 && planar_out == true) {
force_planar = true;
}
if (penum->icc_link->is_identity && !need_decode && !force_planar) {
/* Fastest case. No decode or CM needed */
*psrc_cm = (unsigned char *) psrc;
spp_cm = spp;
*bufend = *psrc_cm + w;
*psrc_cm_start = NULL;
} else {
spp_cm = num_des_comps;
*psrc_cm = gs_alloc_bytes(pis->memory, w * spp_cm/spp,
"image_render_color_icc");
*psrc_cm_start = *psrc_cm;
*bufend = *psrc_cm + w * spp_cm/spp;
if (penum->icc_link->is_identity && !force_planar) {
/* decode only. no CM. This is slow but does not happen that often */
decode_row(penum, psrc, spp, *psrc_cm, *bufend);
} else {
/* Set up the buffer descriptors. planar out always ends up here */
num_pixels = w/spp;
gsicc_init_buffer(&input_buff_desc, spp, 1,
false, false, false, 0, w,
1, num_pixels);
if (!force_planar) {
gsicc_init_buffer(&output_buff_desc, spp_cm, 1,
false, false, false, 0, num_pixels * spp_cm,
1, num_pixels);
} else {
gsicc_init_buffer(&output_buff_desc, spp_cm, 1,
false, false, true, w/spp, w/spp,
1, num_pixels);
}
/* For now, just blast it all through the link. If we had a significant reduction
we will want to repack the data first and then do this. That will be
an optimization shortly. For now just allocate a new output
buffer. We can reuse the old one if the number of channels in the output is
less than or equal to the new one. */
if (need_decode) {
/* Need decode and CM. This is slow but does not happen that often */
*psrc_decode = gs_alloc_bytes(pis->memory, w,
"image_render_color_icc");
if (penum->cie_range == NULL) {
decode_row(penum, psrc, spp, *psrc_decode, (*psrc_decode)+w);
} else {
/* Decode needs to include adjustment for CIE range */
decode_row_cie(penum, psrc, spp, *psrc_decode,
(*psrc_decode)+w, penum->cie_range);
}
(penum->icc_link->procs.map_buffer)(dev, penum->icc_link,
&input_buff_desc,
&output_buff_desc,
(void*) *psrc_decode,
(void*) *psrc_cm);
gs_free_object(pis->memory, (byte *) *psrc_decode,
"image_render_color_icc");
} else {
/* CM only. No decode */
(penum->icc_link->procs.map_buffer)(dev, penum->icc_link,
&input_buff_desc,
&output_buff_desc,
(void*) psrc,
(void*) *psrc_cm);
}
}
}
*spp_cm_out = spp_cm;
return 0;
}
static int
image_render_color_thresh(gx_image_enum *penum_orig, const byte *buffer, int data_x,
uint w, int h, gx_device * dev)
{
gx_image_enum *penum = penum_orig; /* const within proc */
image_posture posture = penum->posture;
int vdi; /* amounts to replicate */
fixed xrun = 0;
byte *thresh_align;
byte *devc_contone[GX_DEVICE_COLOR_MAX_COMPONENTS];
byte *psrc_plane[GX_DEVICE_COLOR_MAX_COMPONENTS];
byte *devc_contone_gray;
const byte *psrc = buffer + data_x;
int dest_width, dest_height, data_length;
int spp_out = dev->color_info.num_components;
int position, k, j;
int offset_bits = penum->ht_offset_bits;
int contone_stride = 0; /* Not used in landscape case */
fixed scale_factor, offset;
int src_size;
bool flush_buff = false;
byte *psrc_temp;
int offset_contone[GX_DEVICE_COLOR_MAX_COMPONENTS]; /* to ensure 128 bit boundary */
int offset_threshold; /* to ensure 128 bit boundary */
gx_dda_int_t dda_ht;
int code = 0;
int spp_cm = 0;
byte *psrc_cm = NULL, *psrc_cm_start = NULL, *psrc_decode = NULL;
byte *bufend = NULL, *curr_ptr;
int psrc_planestride = w/penum->spp;
gx_color_value conc;
int num_des_comp = penum->dev->color_info.num_components;
if (h != 0) {
/* Get the buffer into the device color space */
code = image_color_icc_prep(penum, psrc, w, dev, &spp_cm, &psrc_cm,
&psrc_cm_start, &psrc_decode, &bufend,
true);
/* Also, if need apply the transfer function at this time. This
should be reworked so that we are not doing all these conversions */
if (penum->icc_setup.has_transfer) {
for (k = 0; k < num_des_comp; k++) {
curr_ptr = psrc_cm + psrc_planestride * k;
for (j = 0; j < psrc_planestride; j++, curr_ptr++) {
conc = gx_color_value_from_byte(curr_ptr[0]);
cmap_transfer_plane(&(conc), penum->pis, penum->dev, k);
curr_ptr[0] = gx_color_value_to_byte(conc);
}
}
}
} else {
if (penum->ht_landscape.count == 0 || posture == image_portrait) {
return 0;
} else {
/* Need to flush the buffer */
offset_bits = penum->ht_landscape.count;
penum->ht_offset_bits = offset_bits;
penum->ht_landscape.offset_set = true;
flush_buff = true;
}
}
/* Data is now in the proper destination color space. Now we want
to go ahead and get the data into the proper spatial setting and then
threshold. First get the data spatially sampled correctly */
src_size = penum->rect.w - 1;
switch (posture) {
case image_portrait:
/* Figure out our offset in the contone and threshold data
buffers so that we ensure that we are on the 128bit
memory boundaries when we get offset_bits into the data. */
/* Can't do this earlier, as GC might move the buffers. */
vdi = penum->hci;
contone_stride = penum->line_size;
offset_threshold = (- (((long)(penum->thresh_buffer)) +
penum->ht_offset_bits)) & 15;
for (k = 0; k < spp_out; k ++) {
offset_contone[k] = (- (((long)(penum->line)) +
contone_stride * k +
penum->ht_offset_bits)) & 15;
}
xrun = dda_current(penum->dda.pixel0.x);
xrun = xrun - penum->adjust + (fixed_half - fixed_epsilon);
dest_width = fixed2int_var_rounded(any_abs(penum->x_extent.x));
if (penum->x_extent.x < 0)
xrun += penum->x_extent.x;
data_length = dest_width;
dest_height = fixed2int_var_rounded(any_abs(penum->y_extent.y));
scale_factor = float2fixed_rounded((float) src_size / (float) (dest_width - 1));
#ifdef DEBUG
/* Help in spotting problems */
memset(penum->ht_buffer, 0x00, penum->ht_stride * vdi * spp_out);
#endif
break;
case image_landscape:
default:
/* Figure out our offset in the contone and threshold data buffers
so that we ensure that we are on the 128bit memory boundaries.
Can't do this earlier as GC may move the buffers.
*/
vdi = penum->wci;
contone_stride = penum->line_size;
offset_threshold = (-(long)(penum->thresh_buffer)) & 15;
for (k = 0; k < spp_out; k ++) {
offset_contone[k] = (- ((long)(penum->line) +
contone_stride * k)) & 15;
}
dest_width = fixed2int_var_rounded(any_abs(penum->y_extent.x));
dest_height = fixed2int_var_rounded(any_abs(penum->x_extent.y));
data_length = dest_height;
scale_factor = float2fixed_rounded((float) src_size / (float) (dest_height - 1));
/* In the landscaped case, we want to accumulate multiple columns
of data before sending to the device. We want to have a full
byte of HT data in one write. This may not be possible at the
left or right and for those and for those we have so send partial
chunks */
/* Initialize our xstart and compute our partial bit chunk so
that we get in sync with the 1 bit mem device 16 bit positions
for the rest of the chunks */
if (penum->ht_landscape.count == 0) {
/* In the landscape case, the size depends upon
if we are moving left to right or right to left with
the image data. This offset is to ensure that we get
aligned in our chunks along 16 bit boundaries */
penum->ht_landscape.offset_set = true;
if (penum->ht_landscape.index < 0) {
penum->ht_landscape.xstart = penum->xci + vdi - 1;
offset_bits = (penum->ht_landscape.xstart % 16) + 1;
/* xci can be negative, so allow for that */
if (offset_bits <= 0) offset_bits += 16;
} else {
penum->ht_landscape.xstart = penum->xci;
/* xci can be negative, see Bug 692569. */
offset_bits = 16 - penum->xci % 16;
if (offset_bits >= 16) offset_bits -= 16;
}
if (offset_bits == 0 || offset_bits == 16) {
penum->ht_landscape.offset_set = false;
penum->ht_offset_bits = 0;
} else {
penum->ht_offset_bits = offset_bits;
}
}
break;
}
/* Get the pointers to our buffers */
if (flush_buff) goto flush; /* All done */
/* Set up the dda. We could move this out but the cost is pretty small */
dda_init(dda_ht, 0, src_size, data_length-1);
/* Do conversion to device resolution in quick small loops. */
/* For now we have 3 cases. A CMYK (4 channel), gray, or other case
the latter of which is not yet implemented */
for (k = 0; k < spp_out; k++) {
if (posture == image_portrait) {
devc_contone[k] = penum->line + contone_stride * k +
offset_contone[k];
} else {
devc_contone[k] = penum->line + offset_contone[k] +
LAND_BITS * k * contone_stride;
}
psrc_plane[k] = psrc_cm + psrc_planestride * k;
}
switch (spp_out)
{
/* Monochrome output case */
case 1:
devc_contone_gray = devc_contone[0];
switch (posture) {
/* Monochrome portrait */
case image_portrait:
if (penum->dst_width > 0) {
if (scale_factor == fixed_1) {
memcpy(devc_contone_gray, psrc_cm, data_length);
} else if (scale_factor == fixed_half) {
psrc_temp = psrc_cm;
for (k = 0; k < data_length; k+=2,
devc_contone_gray+=2, psrc_temp++) {
*devc_contone_gray =
*(devc_contone_gray+1) = *psrc_temp;
}
} else {
for (k = 0; k < data_length; k++,
devc_contone_gray++) {
*devc_contone_gray = psrc_cm[dda_ht.state.Q];
dda_next(dda_ht);
}
}
} else {
devc_contone_gray += (data_length - 1);
for (k = 0; k < data_length; k++, devc_contone_gray--) {
*devc_contone_gray = psrc_cm[dda_ht.state.Q];
dda_next(dda_ht);
}
}
break;
/* Monochrome landscape */
case image_landscape:
/* We store the data at this point into a column. Depending
upon our landscape direction we may be going left to right
or right to left. */
if (penum->ht_landscape.flipy) {
position = penum->ht_landscape.curr_pos +
LAND_BITS * (data_length - 1);
for (k = 0; k < data_length; k++) {
devc_contone_gray[position] = psrc_cm[dda_ht.state.Q];
position -= LAND_BITS;
dda_next(dda_ht);
}
} else {
position = penum->ht_landscape.curr_pos;
/* Code up special cases for when we have no scaling
and 2x scaling which we will run into in 300 and
600dpi devices and content */
if (scale_factor == fixed_1) {
for (k = 0; k < data_length; k++) {
devc_contone_gray[position] = psrc_cm[k];
position += LAND_BITS;
}
} else if (scale_factor == fixed_half) {
for (k = 0; k < data_length; k+=2) {
offset = fixed2int_rounded(scale_factor * k);
devc_contone_gray[position] =
devc_contone_gray[position + LAND_BITS] =
psrc_cm[offset];
position += 2*LAND_BITS;
}
} else {
/* use dda */
for (k = 0; k < data_length; k++) {
devc_contone_gray[position] =
psrc_cm[dda_ht.state.Q];
position += LAND_BITS;
dda_next(dda_ht);
}
}
}
/* Store the width information and update our counts */
penum->ht_landscape.count += vdi;
penum->ht_landscape.widths[penum->ht_landscape.curr_pos] = vdi;
penum->ht_landscape.curr_pos += penum->ht_landscape.index;
penum->ht_landscape.num_contones++;
break;
default:
/* error not allowed */
break;
}
break;
/* CMYK case */
case 4:
switch (posture) {
/* CMYK portrait */
case image_portrait:
if (penum->dst_width > 0) {
if (scale_factor == fixed_1) {
memcpy(devc_contone[0], psrc_plane[0], data_length);
memcpy(devc_contone[1], psrc_plane[1], data_length);
memcpy(devc_contone[2], psrc_plane[2], data_length);
memcpy(devc_contone[3], psrc_plane[3], data_length);
} else if (scale_factor == fixed_half) {
for (k = 0; k < data_length; k+=2) {
*(devc_contone[0]) = *(devc_contone[0]+1) =
*psrc_plane[0]++;
*(devc_contone[1]) = *(devc_contone[1]+1) =
*psrc_plane[1]++;
*(devc_contone[2]) = *(devc_contone[2]+1) =
*psrc_plane[2]++;
*(devc_contone[3]) = *(devc_contone[3]+1) =
*psrc_plane[3]++;
devc_contone[0] += 2;
devc_contone[1] += 2;
devc_contone[2] += 2;
devc_contone[3] += 2;
}
} else {
for (k = 0; k < data_length; k++) {
*(devc_contone[0])++ =
(psrc_plane[0])[dda_ht.state.Q];
*(devc_contone[1])++ =
(psrc_plane[1])[dda_ht.state.Q];
*(devc_contone[2])++ =
(psrc_plane[2])[dda_ht.state.Q];
*(devc_contone[3])++ =
(psrc_plane[3])[dda_ht.state.Q];
dda_next(dda_ht);
}
}
} else {
devc_contone[0] += (data_length - 1);
devc_contone[1] += (data_length - 1);
devc_contone[2] += (data_length - 1);
devc_contone[3] += (data_length - 1);
for (k = 0; k < data_length; k++) {
*(devc_contone[0])-- = (psrc_plane[0])[dda_ht.state.Q];
*(devc_contone[1])-- = (psrc_plane[1])[dda_ht.state.Q];
*(devc_contone[2])-- = (psrc_plane[2])[dda_ht.state.Q];
*(devc_contone[3])-- = (psrc_plane[3])[dda_ht.state.Q];
dda_next(dda_ht);
}
}
break;
/* CMYK landscape */
case image_landscape:
/* Data is already color managed. */
/* We store the data at this point into a columns in
seperate planes. Depending upon our landscape direction
we may be going left to right or right to left. */
if (penum->ht_landscape.flipy) {
position = penum->ht_landscape.curr_pos +
LAND_BITS * (data_length - 1);
for (k = 0; k < data_length; k++) {
for (j = 0; j < spp_out; j++) {
*(devc_contone[j] + position) =
(psrc_plane[j])[dda_ht.state.Q];
}
position -= LAND_BITS;
dda_next(dda_ht);
}
} else {
position = penum->ht_landscape.curr_pos;
/* Code up special cases for when we have no scaling
and 2x scaling which we will run into in 300 and
600dpi devices and content */
/* Apply initial offset */
for (k = 0; k < spp_out; k++) {
devc_contone[k] = devc_contone[k] + position;
}
if (scale_factor == fixed_1) {
for (k = 0; k < data_length; k++) {
/* Is it better to unwind this? We know it is 4 */
for (j = 0; j < spp_out; j++) {
*(devc_contone[j]) = (psrc_plane[j])[k];
devc_contone[j] += LAND_BITS;
}
}
} else if (scale_factor == fixed_half) {
for (k = 0; k < data_length; k+=2) {
offset = fixed2int_rounded(scale_factor * k);
/* Is it better to unwind this? We know it is 4 */
for (j = 0; j < spp_out; j++) {
*(devc_contone[j]) =
*(devc_contone[j] + LAND_BITS) =
(psrc_plane[j])[offset];
devc_contone[j] += 2 * LAND_BITS;
}
}
} else {
/* use dda */
for (k = 0; k < data_length; k++) {
/* Is it better to unwind this? We know it is 4 */
for (j = 0; j < spp_out; j++) {
*(devc_contone[j]) =
(psrc_plane[j])[dda_ht.state.Q];
devc_contone[j] += LAND_BITS;
}
dda_next(dda_ht);
}
}
}
/* Store the width information and update our counts */
penum->ht_landscape.count += vdi;
penum->ht_landscape.widths[penum->ht_landscape.curr_pos] = vdi;
penum->ht_landscape.curr_pos += penum->ht_landscape.index;
penum->ht_landscape.num_contones++;
break;
default:
/* error not allowed */
break;
}
break;
default:
/* Not yet handled (e.g. CMY case) */
break;
}
/* Apply threshold array to image data. It may be neccessary to invert
depnding upon the polarity of the device */
flush:
thresh_align = penum->thresh_buffer + offset_threshold;
code = gxht_thresh_planes(penum, xrun, dest_width, dest_height,
thresh_align, dev, offset_contone,
contone_stride);
/* Free cm buffer, if it was used */
if (psrc_cm_start != NULL) {
gs_free_object(penum->pis->memory, (byte *)psrc_cm_start,
"image_render_color_thresh");
}
return code;
}
/* Render a color image with 8 or fewer bits per sample using ICC profile. */
static int
image_render_color_icc(gx_image_enum *penum_orig, const byte *buffer, int data_x,
uint w, int h, gx_device * dev)
{
const gx_image_enum *const penum = penum_orig; /* const within proc */
const gs_imager_state *pis = penum->pis;
gs_logical_operation_t lop = penum->log_op;
gx_dda_fixed_point pnext;
image_posture posture = penum->posture;
fixed xprev, yprev;
fixed pdyx, pdyy; /* edge of parallelogram */
int vci, vdi;
gx_device_color devc1;
gx_device_color devc2;
gx_device_color *pdevc;
gx_device_color *pdevc_next;
gx_device_color *ptemp;
int spp = penum->spp;
const byte *psrc_initial = buffer + data_x * spp;
const byte *psrc = psrc_initial;
const byte *rsrc = psrc + spp; /* psrc + spp at start of run */
fixed xrun; /* x ditto */
fixed yrun; /* y ditto */
int irun; /* int x/rrun */
color_samples run; /* run value */
color_samples next; /* next sample value */
byte *bufend = NULL;
int code = 0;
byte *psrc_cm = NULL, *psrc_cm_start = NULL, *psrc_decode = NULL;
int k;
gx_color_value conc[GX_DEVICE_COLOR_MAX_COMPONENTS];
int spp_cm = 0;
gx_color_index color;
bool must_halftone = penum->icc_setup.must_halftone;
bool has_transfer = penum->icc_setup.has_transfer;
pdevc = &devc1;
pdevc_next = &devc2;
/* These used to be set by init clues */
pdevc->type = gx_dc_type_none;
pdevc_next->type = gx_dc_type_none;
if (h == 0)
return 0;
code = image_color_icc_prep(penum_orig, psrc, w, dev, &spp_cm, &psrc_cm,
&psrc_cm_start, &psrc_decode, &bufend, false);
if (code < 0) return code;
/* Needed for device N */
memset(&(conc[0]), 0, sizeof(gx_color_value[GX_DEVICE_COLOR_MAX_COMPONENTS]));
pnext = penum->dda.pixel0;
xrun = xprev = dda_current(pnext.x);
yrun = yprev = dda_current(pnext.y);
pdyx = dda_current(penum->dda.row.x) - penum->cur.x;
pdyy = dda_current(penum->dda.row.y) - penum->cur.y;
switch (posture) {
case image_portrait:
vci = penum->yci, vdi = penum->hci;
irun = fixed2int_var_rounded(xrun);
break;
case image_landscape:
default: /* we don't handle skew -- treat as landscape */
vci = penum->xci, vdi = penum->wci;
irun = fixed2int_var_rounded(yrun);
break;
}
if_debug5('b', "[b]y=%d data_x=%d w=%d xt=%f yt=%f\n",
penum->y, data_x, w, fixed2float(xprev), fixed2float(yprev));
memset(&run, 0, sizeof(run));
memset(&next, 0, sizeof(next));
run.v[0] = ~psrc_cm[0]; /* Force intial setting */
while (psrc_cm < bufend) {
dda_next(pnext.x);
dda_next(pnext.y);
if ( penum->alpha ) {
/* If the pixels are different, then take care of the alpha now */
/* will need to adjust spp below.... */
} else {
memcpy(&(next.v[0]),psrc_cm, spp_cm);
psrc_cm += spp_cm;
}
/* Compare to previous. If same then move on */
if (posture != image_skewed && next.all[0] == run.all[0])
goto inc;
/* This needs to be sped up */
for ( k = 0; k < spp_cm; k++ ) {
conc[k] = gx_color_value_from_byte(next.v[k]);
}
/* Now we can do an encoding directly or we have to apply transfer
and or halftoning */
if (must_halftone || has_transfer) {
/* We need to do the tranfer function and/or the halftoning */
cmap_transfer_halftone(&(conc[0]), pdevc_next, pis, dev,
has_transfer, must_halftone, gs_color_select_source);
} else {
/* encode as a color index. avoid all the cv to frac to cv
conversions */
color = dev_proc(dev, encode_color)(dev, &(conc[0]));
/* check if the encoding was successful; we presume failure is rare */
if (color != gx_no_color_index)
color_set_pure(pdevc_next, color);
}
/* Fill the region between */
/* xrun/irun and xprev */
/*
* Note; This section is nearly a copy of a simlar section below
* for processing the last image pixel in the loop. This would have been
* made into a subroutine except for complications about the number of
* variables that would have been needed to be passed to the routine.
*/
switch (posture) {
case image_portrait:
{ /* Rectangle */
int xi = irun;
int wi = (irun = fixed2int_var_rounded(xprev)) - xi;
if (wi < 0)
xi += wi, wi = -wi;
if (wi > 0)
code = gx_fill_rectangle_device_rop(xi, vci, wi, vdi,
pdevc, dev, lop);
}
break;
case image_landscape:
{ /* 90 degree rotated rectangle */
int yi = irun;
int hi = (irun = fixed2int_var_rounded(yprev)) - yi;
if (hi < 0)
yi += hi, hi = -hi;
if (hi > 0)
code = gx_fill_rectangle_device_rop(vci, yi, vdi, hi,
pdevc, dev, lop);
}
break;
default:
{ /* Parallelogram */
code = (*dev_proc(dev, fill_parallelogram))
(dev, xrun, yrun, xprev - xrun, yprev - yrun, pdyx, pdyy,
pdevc, lop);
xrun = xprev;
yrun = yprev;
}
}
if (code < 0)
goto err;
rsrc = psrc;
/* Swap around the colors due to a change */
ptemp = pdevc;
pdevc = pdevc_next;
pdevc_next = ptemp;
run = next;
inc: xprev = dda_current(pnext.x);
yprev = dda_current(pnext.y); /* harmless if no skew */
}
/* Fill the last run. */
/*
* Note; This section is nearly a copy of a simlar section above
* for processing an image pixel in the loop. This would have been
* made into a subroutine except for complications about the number
* variables that would have been needed to be passed to the routine.
*/
switch (posture) {
case image_portrait:
{ /* Rectangle */
int xi = irun;
int wi = (irun = fixed2int_var_rounded(xprev)) - xi;
if (wi < 0)
xi += wi, wi = -wi;
if (wi > 0)
code = gx_fill_rectangle_device_rop(xi, vci, wi, vdi,
pdevc, dev, lop);
}
break;
case image_landscape:
{ /* 90 degree rotated rectangle */
int yi = irun;
int hi = (irun = fixed2int_var_rounded(yprev)) - yi;
if (hi < 0)
yi += hi, hi = -hi;
if (hi > 0)
code = gx_fill_rectangle_device_rop(vci, yi, vdi, hi,
pdevc, dev, lop);
}
break;
default:
{ /* Parallelogram */
code = (*dev_proc(dev, fill_parallelogram))
(dev, xrun, yrun, xprev - xrun, yprev - yrun, pdyx, pdyy,
pdevc, lop);
}
}
/* Free cm buffer, if it was used */
if (psrc_cm_start != NULL) {
gs_free_object(pis->memory, (byte *)psrc_cm_start, "image_render_color_icc");
}
return (code < 0 ? code : 1);
/* Save position if error, in case we resume. */
err:
gs_free_object(pis->memory, (byte *)psrc_cm_start, "image_render_color_icc");
penum_orig->used.x = (rsrc - spp - psrc_initial) / spp;
penum_orig->used.y = 0;
return code;
}
/* Render a color image for deviceN source color with no ICC profile. This
is also used if the image has any masking (type4 image) since we will not
be blasting through quickly */
static int
image_render_color_DeviceN(gx_image_enum *penum_orig, const byte *buffer, int data_x,
uint w, int h, gx_device * dev)
{
const gx_image_enum *const penum = penum_orig; /* const within proc */
const gs_imager_state *pis = penum->pis;
gs_logical_operation_t lop = penum->log_op;
gx_dda_fixed_point pnext;
image_posture posture = penum->posture;
fixed xprev, yprev;
fixed pdyx, pdyy; /* edge of parallelogram */
int vci, vdi;
const gs_color_space *pcs = penum->pcs;
cs_proc_remap_color((*remap_color)) = pcs->type->remap_color;
gs_client_color cc;
gx_device_color devc1;
gx_device_color devc2;
gx_device_color *pdevc;
gx_device_color *pdevc_next;
gx_device_color *ptemp;
int spp = penum->spp;
const byte *psrc_initial = buffer + data_x * spp;
const byte *psrc = psrc_initial;
const byte *rsrc = psrc + spp; /* psrc + spp at start of run */
fixed xrun; /* x ditto */
fixed yrun; /* y ditto */
int irun; /* int x/rrun */
color_samples run; /* run value */
color_samples next; /* next sample value */
const byte *bufend = psrc + w;
int code = 0, mcode = 0;
int i;
bits32 mask = penum->mask_color.mask;
bits32 test = penum->mask_color.test;
bool lab_case = false;
if (h == 0)
return 0;
/* Decide on which remap proc to use. If the source colors are LAB
then use the mapping that does not rescale the source colors */
if (gs_color_space_is_ICC(pcs) && pcs->cmm_icc_profile_data != NULL &&
pcs->cmm_icc_profile_data->islab) {
remap_color = gx_remap_ICC_imagelab;
lab_case = true;
} else {
remap_color = pcs->type->remap_color;
}
pdevc = &devc1;
pdevc_next = &devc2;
/* In case these are devn colors */
if (dev_proc(dev, dev_spec_op)(dev, gxdso_supports_devn, NULL, 0)) {
for (i = 0; i < GS_CLIENT_COLOR_MAX_COMPONENTS; i++) {
pdevc->colors.devn.values[i] = 0;
pdevc_next->colors.devn.values[i] = 0;
}
}
/* These used to be set by init clues */
pdevc->type = gx_dc_type_none;
pdevc_next->type = gx_dc_type_none;
pnext = penum->dda.pixel0;
xrun = xprev = dda_current(pnext.x);
yrun = yprev = dda_current(pnext.y);
pdyx = dda_current(penum->dda.row.x) - penum->cur.x;
pdyy = dda_current(penum->dda.row.y) - penum->cur.y;
switch (posture) {
case image_portrait:
vci = penum->yci, vdi = penum->hci;
irun = fixed2int_var_rounded(xrun);
break;
case image_landscape:
default: /* we don't handle skew -- treat as landscape */
vci = penum->xci, vdi = penum->wci;
irun = fixed2int_var_rounded(yrun);
break;
}
if_debug5('b', "[b]y=%d data_x=%d w=%d xt=%f yt=%f\n",
penum->y, data_x, w, fixed2float(xprev), fixed2float(yprev));
memset(&run, 0, sizeof(run));
memset(&next, 0, sizeof(next));
cs_full_init_color(&cc, pcs);
run.v[0] = ~psrc[0]; /* force remap */
while (psrc < bufend) {
dda_next(pnext.x);
dda_next(pnext.y);
if (posture != image_skewed && !memcmp(psrc, run.v, spp)) {
psrc += spp;
goto inc;
}
memcpy(next.v, psrc, spp);
psrc += spp;
/* Check for transparent color. */
if ((next.all[0] & mask) == test &&
(penum->mask_color.exact ||
mask_color_matches(next.v, penum, spp))) {
color_set_null(pdevc_next);
goto mapped;
}
/* Data is already properly set up for ICC use of LAB */
if (lab_case)
for (i = 0; i < spp; ++i)
cc.paint.values[i] = (next.v[i]) * (1.0f / 255.0f);
else
for (i = 0; i < spp; ++i)
decode_sample(next.v[i], cc, i);
#ifdef DEBUG
if (gs_debug_c('B')) {
dprintf2("[B]cc[0..%d]=%g", spp - 1,
cc.paint.values[0]);
for (i = 1; i < spp; ++i)
dprintf1(",%g", cc.paint.values[i]);
dputs("\n");
}
#endif
mcode = remap_color(&cc, pcs, pdevc_next, pis, dev,
gs_color_select_source);
mapped: if (mcode < 0)
goto fill;
if (sizeof(pdevc_next->colors.binary.color[0]) <= sizeof(ulong))
if_debug7('B', "[B]0x%x,0x%x,0x%x,0x%x -> 0x%lx,0x%lx,0x%lx\n",
next.v[0], next.v[1], next.v[2], next.v[3],
(ulong)pdevc_next->colors.binary.color[0],
(ulong)pdevc_next->colors.binary.color[1],
(ulong) pdevc_next->type);
else
if_debug9('B', "[B]0x%x,0x%x,0x%x,0x%x -> 0x%08lx%08lx,0x%08lx%08lx,0x%lx\n",
next.v[0], next.v[1], next.v[2], next.v[3],
(ulong)(pdevc_next->colors.binary.color[0] >>
8 * (sizeof(pdevc_next->colors.binary.color[0]) - sizeof(ulong))),
(ulong)pdevc_next->colors.binary.color[0],
(ulong)(pdevc_next->colors.binary.color[1] >>
8 * (sizeof(pdevc_next->colors.binary.color[1]) - sizeof(ulong))),
(ulong)pdevc_next->colors.binary.color[1],
(ulong) pdevc_next->type);
/* NB: printf above fails to account for sizeof gx_color_index 4 or 8 bytes */
if (posture != image_skewed && dev_color_eq(*pdevc, *pdevc_next))
goto set;
fill: /* Fill the region between */
/* xrun/irun and xprev */
/*
* Note; This section is nearly a copy of a simlar section below
* for processing the last image pixel in the loop. This would have been
* made into a subroutine except for complications about the number of
* variables that would have been needed to be passed to the routine.
*/
switch (posture) {
case image_portrait:
{ /* Rectangle */
int xi = irun;
int wi = (irun = fixed2int_var_rounded(xprev)) - xi;
if (wi < 0)
xi += wi, wi = -wi;
if (wi > 0)
code = gx_fill_rectangle_device_rop(xi, vci, wi, vdi,
pdevc, dev, lop);
}
break;
case image_landscape:
{ /* 90 degree rotated rectangle */
int yi = irun;
int hi = (irun = fixed2int_var_rounded(yprev)) - yi;
if (hi < 0)
yi += hi, hi = -hi;
if (hi > 0)
code = gx_fill_rectangle_device_rop(vci, yi, vdi, hi,
pdevc, dev, lop);
}
break;
default:
{ /* Parallelogram */
code = (*dev_proc(dev, fill_parallelogram))
(dev, xrun, yrun, xprev - xrun, yprev - yrun, pdyx, pdyy,
pdevc, lop);
xrun = xprev;
yrun = yprev;
}
}
if (code < 0)
goto err;
rsrc = psrc;
if ((code = mcode) < 0) goto err;
/* Swap around the colors due to a change */
ptemp = pdevc;
pdevc = pdevc_next;
pdevc_next = ptemp;
set: run = next;
inc: xprev = dda_current(pnext.x);
yprev = dda_current(pnext.y); /* harmless if no skew */
}
/* Fill the last run. */
/*
* Note; This section is nearly a copy of a simlar section above
* for processing an image pixel in the loop. This would have been
* made into a subroutine except for complications about the number
* variables that would have been needed to be passed to the routine.
*/
switch (posture) {
case image_portrait:
{ /* Rectangle */
int xi = irun;
int wi = (irun = fixed2int_var_rounded(xprev)) - xi;
if (wi < 0)
xi += wi, wi = -wi;
if (wi > 0)
code = gx_fill_rectangle_device_rop(xi, vci, wi, vdi,
pdevc, dev, lop);
}
break;
case image_landscape:
{ /* 90 degree rotated rectangle */
int yi = irun;
int hi = (irun = fixed2int_var_rounded(yprev)) - yi;
if (hi < 0)
yi += hi, hi = -hi;
if (hi > 0)
code = gx_fill_rectangle_device_rop(vci, yi, vdi, hi,
pdevc, dev, lop);
}
break;
default:
{ /* Parallelogram */
code = (*dev_proc(dev, fill_parallelogram))
(dev, xrun, yrun, xprev - xrun, yprev - yrun, pdyx, pdyy,
pdevc, lop);
}
}
return (code < 0 ? code : 1);
/* Save position if error, in case we resume. */
err:
penum_orig->used.x = (rsrc - spp - psrc_initial) / spp;
penum_orig->used.y = 0;
return code;
}
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