static bool
bbox_image_planes_wanted(const gx_image_enum_common_t * info, byte *wanted)
{
/* This is only used if target_info != 0. */
const bbox_image_enum *pbe = (const bbox_image_enum *)info;
return gx_image_planes_wanted(pbe->target_info, wanted);
}
static int
bbox_begin_typed_image(gx_device * dev,
const gs_imager_state * pis, const gs_matrix * pmat,
const gs_image_common_t * pic, const gs_int_rect * prect,
const gx_drawing_color * pdcolor,
const gx_clip_path * pcpath,
gs_memory_t * memory, gx_image_enum_common_t ** pinfo)
{
bbox_image_enum *pbe;
int code =
bbox_image_begin(pis, pmat, pic, prect, pcpath, memory, &pbe);
if (code < 0)
return code;
/*
* If there is no target, we still have to call default_begin_image
* to get the correct num_planes and plane_depths.
*/
{
gx_device_bbox *const bdev = (gx_device_bbox *) dev;
gx_device *tdev = bdev->target;
dev_proc_begin_typed_image((*begin_typed_image));
byte wanted[GS_IMAGE_MAX_COMPONENTS];
if (tdev == 0) {
tdev = dev;
begin_typed_image = gx_default_begin_typed_image;
} else {
begin_typed_image = dev_proc(tdev, begin_typed_image);
}
code = (*begin_typed_image)
(tdev, pis, pmat, pic, prect, pdcolor, pcpath, memory,
&pbe->target_info);
if (code) {
bbox_image_end_image((gx_image_enum_common_t *)pbe, false);
return code;
}
/*
* We fill in num_planes and plane_depths later. format is
* irrelevant. NOTE: we assume that if begin_typed_image returned
* 0, the image is a data image.
*/
code = gx_image_enum_common_init((gx_image_enum_common_t *) pbe,
(const gs_data_image_t *)pic,
&bbox_image_enum_procs, dev,
0, gs_image_format_chunky);
if (code < 0)
return code;
bbox_image_copy_target_info(pbe);
pbe->params_are_const =
gx_image_planes_wanted(pbe->target_info, wanted);
}
*pinfo = (gx_image_enum_common_t *) pbe;
return 0;
}
/* Cache information when initializing, or after transferring plane data. */
static void
cache_planes(gs_image_enum *penum)
{
int i;
if (penum->wanted_varies) {
penum->wanted_varies =
!gx_image_planes_wanted(penum->info, penum->wanted);
for (i = 0; i < penum->num_planes; ++i)
if (penum->wanted[i])
penum->image_planes[i].raster =
gs_image_bytes_per_plane_row(penum, i);
else
penum->image_planes[i].data = 0;
}
}
