int
gs_pop_transparency_state(gs_state *pgs, bool force)
{
gs_pdf14trans_params_t params = { 0 };
gs_imager_state * pis = (gs_imager_state *)pgs;
int code;
if (check_for_nontrans_pattern(pgs,
(unsigned char *)"gs_pop_transparency_state")) {
return(0);
}
/* Check if flag is set, which indicates that we have
an active softmask for the graphic state. We
need to communicate to the compositor to pop
the softmask */
if ( pis->trans_flags.xstate_change || force) {
if_debug0m('v', pgs->memory, "[v]gs_pop_transparency_state sending\n");
params.pdf14_op = PDF14_POP_TRANS_STATE;
code = gs_state_update_pdf14trans(pgs, ¶ms);
if ( code < 0 )
return (code);
} else {
if_debug0m('v', pgs->memory, "[v]gs_pop_transparency_state NOT sending\n");
}
/* There is no reason to reset any of the flags since
they will be reset by the graphic state restore */
return(0);
}
int
gs_end_transparency_group(gs_state *pgs)
{
gs_pdf14trans_params_t params = { 0 };
if (pgs->is_gstate && check_for_nontrans_pattern(pgs,
(unsigned char *)"gs_end_transparency_group")) {
return(0);
}
if_debug0m('v', pgs->memory, "[v]gs_end_transparency_group\n");
params.pdf14_op = PDF14_END_TRANS_GROUP; /* Other parameters not used */
return gs_state_update_pdf14trans(pgs, ¶ms);
}
int
gs_push_transparency_state(gs_state *pgs)
{
gs_pdf14trans_params_t params = { 0 };
gs_imager_state * pis = (gs_imager_state *)pgs;
int code;
if (check_for_nontrans_pattern(pgs,
(unsigned char *)"gs_push_transparency_state")) {
return(0);
}
/* Set the pending flag to true, which indicates
that we need to watch for end transparency
soft masks when we are at this graphic state
level */
/* pis->trans_flags.xstate_pending = true; */
/* Actually I believe the above flag is not
needed. We really should be watching for
the softmask even at the base level. What
we need to watch for are q operations after
a soft mask end has occured. */
/* Check if we have a change flag set to true.
this indicates that a softmask is present.
We will need to send a push state to save
the current soft mask, so that we can
restore it later */
if (pis->trans_flags.xstate_change) {
if_debug0m('v', pgs->memory, "[v]gs_push_transparency_state sending\n");
params.pdf14_op = PDF14_PUSH_TRANS_STATE;
code = gs_state_update_pdf14trans(pgs, ¶ms);
if (code < 0)
return(code);
} else {
if_debug0m('v', pgs->memory, "[v]gs_push_transparency_state NOT sending\n");
}
return(0);
}
int
gs_end_transparency_mask(gs_state *pgs,
gs_transparency_channel_selector_t csel)
{
gs_pdf14trans_params_t params = { 0 };
gs_pdf14trans_params_t params_color = { 0 };
gs_imager_state * pis = (gs_imager_state *)pgs;
int code;
if (check_for_nontrans_pattern(pgs,
(unsigned char *)"gs_end_transparency_mask")) {
return(0);
}
/* If we have done a q then set a flag to watch for any Qs */
/* if (pis->trans_flags.xstate_pending)
pis->trans_flags.xstate_change = true; */
/* This should not depend upon if we have encountered a q
operation. We could be setting a softmask, before
there is any q operation. Unlikely but it could happen.
Then if we encouter a q operation (and this flag
is true) we will need to
push the mask graphic state (PDF14_PUSH_TRANS_STATE). */
pis->trans_flags.xstate_change = true;
if_debug1('v', "[v]xstate_changed set true, gstate level is %d\n", pgs->level);
if_debug2('v', "[v](0x%lx)gs_end_transparency_mask(%d)\n", (ulong)pgs,
(int)csel);
params.pdf14_op = PDF14_END_TRANS_MASK; /* Other parameters not used */
params.csel = csel;
/* If this is the outer end then return us to our normal defaults */
if_debug0('v', "[v]popping soft mask color sending\n");
params_color.pdf14_op = PDF14_POP_SMASK_COLOR;
code = gs_state_update_pdf14trans(pgs, ¶ms_color);
if (code < 0)
return(code);
return gs_state_update_pdf14trans(pgs, ¶ms);
}
int
gs_begin_transparency_mask(gs_state * pgs,
const gs_transparency_mask_params_t * ptmp,
const gs_rect * pbbox, bool mask_is_image)
{
gs_pdf14trans_params_t params = { 0 };
gs_pdf14trans_params_t params_color = { 0 };
const int l = sizeof(params.Background[0]) * ptmp->Background_components;
int i, code;
gs_color_space *blend_color_space;
gsicc_manager_t *icc_manager = pgs->icc_manager;
if (check_for_nontrans_pattern(pgs,
(unsigned char *)"gs_pop_transparency_state")) {
return(0);
}
params.pdf14_op = PDF14_BEGIN_TRANS_MASK;
params.bbox = *pbbox;
params.subtype = ptmp->subtype;
params.Background_components = ptmp->Background_components;
memcpy(params.Background, ptmp->Background, l);
params.GrayBackground = ptmp->GrayBackground;
params.transfer_function = ptmp->TransferFunction_data;
params.function_is_identity =
(ptmp->TransferFunction == mask_transfer_identity);
params.mask_is_image = mask_is_image;
params.replacing = ptmp->replacing;
/* The eventual state that we want this smask to be moved to
is always gray. This should provide us with a significant
speed improvement over the old code. This does not keep us
from having groups within the softmask getting blended in different
color spaces, it just makes the final space be gray, which is what
we will need to get to eventually anyway. In this way we avoid a
final color conversion on a potentially large buffer. */
/* Also check if we have loaded in the transparency icc profiles. If not
go ahead and take care of that now */
if (icc_manager->smask_profiles == NULL) {
code = gsicc_initialize_iccsmask(icc_manager);
if (code < 0)
return(code);
}
/* A new soft mask group, make sure the profiles are set */
if_debug0m('v', pgs->memory, "[v]pushing soft mask color sending\n");
if (params.subtype != TRANSPARENCY_MASK_None) {
params_color.pdf14_op = PDF14_PUSH_SMASK_COLOR;
code = gs_state_update_pdf14trans(pgs, ¶ms_color);
if (code < 0)
return(code);
blend_color_space = gs_cspace_new_DeviceGray(pgs->memory);
blend_color_space->cmm_icc_profile_data = pgs->icc_manager->default_gray;
rc_increment(blend_color_space->cmm_icc_profile_data);
if_debug8m('v', pgs->memory, "[v](0x%lx)gs_begin_transparency_mask [%g %g %g %g]\n\
subtype = %d Background_components = %d %s\n",
(ulong)pgs, pbbox->p.x, pbbox->p.y, pbbox->q.x, pbbox->q.y,
(int)ptmp->subtype, ptmp->Background_components,
(ptmp->TransferFunction == mask_transfer_identity ? "no TR" :
"has TR"));
/* Sample the transfer function */
for (i = 0; i < MASK_TRANSFER_FUNCTION_SIZE; i++) {
float in = (float)(i * (1.0 / (MASK_TRANSFER_FUNCTION_SIZE - 1)));
float out;
ptmp->TransferFunction(in, &out, ptmp->TransferFunction_data);
params.transfer_fn[i] = (byte)floor((double)(out * 255 + 0.5));
}
/* Note: This function is called during the c-list writer side. */
if ( blend_color_space->cmm_icc_profile_data != NULL ) {
/* Blending space is ICC based. If we are doing c-list rendering we will
need to write this color space into the clist. */
params.group_color = ICC;
params.group_color_numcomps =
blend_color_space->cmm_icc_profile_data->num_comps;
/* Get the ICC profile */
/* We don't reference count this - see comment in
* pdf14_update_device_color_procs_pop_c()
*/
params.iccprofile = blend_color_space->cmm_icc_profile_data;
params.icc_hash = blend_color_space->cmm_icc_profile_data->hashcode;
} else {
params.group_color = GRAY_SCALE;
params.group_color_numcomps = 1; /* Need to check */
}
/* Explicitly decrement the profile data since blend_color_space may not
* be an ICC color space object.
*/
rc_decrement(blend_color_space->cmm_icc_profile_data, "gs_begin_transparency_mask");
rc_decrement_only_cs(blend_color_space, "gs_begin_transparency_mask");
}
int
gs_begin_transparency_group(gs_state *pgs,
const gs_transparency_group_params_t *ptgp,
const gs_rect *pbbox)
{
gs_pdf14trans_params_t params = { 0 };
const gs_color_space *blend_color_space;
gs_imager_state * pis = (gs_imager_state *)pgs;
cmm_profile_t *profile;
if (check_for_nontrans_pattern(pgs,
(unsigned char *)"gs_begin_transparency_group")) {
return(0);
}
/*
* Put parameters into a compositor parameter and then call the
* create_compositor. This will pass the data to the PDF 1.4
* transparency device.
*/
params.pdf14_op = PDF14_BEGIN_TRANS_GROUP;
params.Isolated = ptgp->Isolated;
params.Knockout = ptgp->Knockout;
params.image_with_SMask = ptgp->image_with_SMask;
params.opacity = pgs->opacity;
params.shape = pgs->shape;
params.blend_mode = pgs->blend_mode;
/* This function is called during the c-list writer side.
Store some information so that we know what the color space is
so that we can adjust according later during the clist reader.
We currently will use the concrete space for any space other than a
device space. However, if the device is a sep device it will blend
in DeviceN color space as required. */
blend_color_space = gs_currentcolorspace_inline(pgs);
if (gs_color_space_get_index(blend_color_space) > gs_color_space_index_DeviceCMYK) {
/* ICC and PS CIE based case. Note that unidirectional PS CIE color
spaces should not be allowed but end up occuring when processing
PDF files with -dUseCIEColor. We will end up using the appropriate
ICC default color space in these cases. */
blend_color_space = gs_currentcolorspace_inline(pgs);
} else {
blend_color_space = cs_concrete_space(blend_color_space, pis);
}
/* Note that if the /CS parameter was NOT present in the push
of the transparency group, then we must actually inherent
the previous group color space, or the color space of the
target device (process color model). Here we just want
to set it as a unknown type for clist writing, as we will take care
of using the parent group color space later during clist reading.
Also, if the group was not isolated we MUST use the parent group
color space regardless of what the group color space is specified to be
*/
if (ptgp->ColorSpace == NULL || params.Isolated != true) {
params.group_color = UNKNOWN;
params.group_color_numcomps = 0;
} else {
/* The /CS parameter was present. Use what was set. Currently
all our Device spaces are actually ICC based. The other options
are if -dUseCIEColor is set, in which case it could be
coming in as a PS CIE color space, which should not be allowed
but should default to one of the default ICC color spaces. Note
that CalRGB and CalGray, which are valid bidirectional color spaces
are converted to ICC profiles during installation. PS CIE building
to ICC is delayed. */
if ( gs_color_space_is_ICC(blend_color_space) ) {
/* Blending space is ICC based. If we are doing c-list rendering
we will need to write this color space into the clist.
*/
params.group_color = ICC;
params.group_color_numcomps =
blend_color_space->cmm_icc_profile_data->num_comps;
/* Get the ICC profile */
params.iccprofile = blend_color_space->cmm_icc_profile_data;
params.icc_hash = blend_color_space->cmm_icc_profile_data->hashcode;
} else {
/* Color space was NOT ICC based. PS CIE space and DeviceN are the only
other option. Use the ICC default based upon the component count. */
switch (cs_num_components(blend_color_space)) {
case 1:
profile = pgs->icc_manager->default_gray;
break;
case 3:
profile = pgs->icc_manager->default_rgb;
break;
case 4:
profile = pgs->icc_manager->default_cmyk;
break;
default:
/* We can end up here if we are in a deviceN color space and
we have a sep output device */
profile = NULL;
params.group_color = DEVICEN;
params.group_color_numcomps = cs_num_components(blend_color_space);
break;
}
if (profile != NULL) {
params.group_color = ICC;
params.group_color_numcomps = profile->num_comps;
params.iccprofile = profile;
params.icc_hash = profile->hashcode;
}
}
}
#ifdef DEBUG
if (gs_debug_c('v')) {
static const char *const cs_names[] = {
GS_COLOR_SPACE_TYPE_NAMES
};
dmlprintf6(pgs->memory, "[v](0x%lx)begin_transparency_group [%g %g %g %g] Num_grp_clr_comp = %d\n",
(ulong)pgs, pbbox->p.x, pbbox->p.y, pbbox->q.x, pbbox->q.y,params.group_color_numcomps);
if (ptgp->ColorSpace)
dmprintf1(pgs->memory, " CS = %s",
cs_names[(int)gs_color_space_get_index(ptgp->ColorSpace)]);
else
dmputs(pgs->memory, " (no CS)");
dmprintf2(pgs->memory, " Isolated = %d Knockout = %d\n",
ptgp->Isolated, ptgp->Knockout);
}
#endif
params.bbox = *pbbox;
return gs_state_update_pdf14trans(pgs, ¶ms);
}