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- /* Copyright (C) 1997, 1998, 1999, 2000 Aladdin Enterprises. All rights reserved.
-
- This file is part of AFPL Ghostscript.
-
- AFPL Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author or
- distributor accepts any responsibility for the consequences of using it, or
- for whether it serves any particular purpose or works at all, unless he or
- she says so in writing. Refer to the Aladdin Free Public License (the
- "License") for full details.
-
- Every copy of AFPL Ghostscript must include a copy of the License, normally
- in a plain ASCII text file named PUBLIC. The License grants you the right
- to copy, modify and redistribute AFPL Ghostscript, but only under certain
- conditions described in the License. Among other things, the License
- requires that the copyright notice and this notice be preserved on all
- copies.
- */
-
- /*$Id: gximage3.c,v 1.6 2000/09/19 19:00:38 lpd Exp $ */
- /* ImageType 3 image implementation */
- #include "math_.h" /* for ceil, floor */
- #include "memory_.h"
- #include "gx.h"
- #include "gserrors.h"
- #include "gsbitops.h"
- #include "gscspace.h"
- #include "gsstruct.h"
- #include "gxdevice.h"
- #include "gxdevmem.h"
- #include "gxclipm.h"
- #include "gximage3.h"
- #include "gxistate.h"
-
- /* Forward references */
- private dev_proc_begin_typed_image(gx_begin_image3);
- private image_enum_proc_plane_data(gx_image3_plane_data);
- private image_enum_proc_end_image(gx_image3_end_image);
- private image_enum_proc_flush(gx_image3_flush);
- private image_enum_proc_planes_wanted(gx_image3_planes_wanted);
-
- /* GC descriptor */
- private_st_gs_image3();
-
- /* Define the image type for ImageType 3 images. */
- const gx_image_type_t gs_image_type_3 = {
- &st_gs_image3, gx_begin_image3, gx_data_image_source_size,
- gx_image_no_sput, gx_image_no_sget, gx_image_default_release, 3
- };
- private const gx_image_enum_procs_t image3_enum_procs = {
- gx_image3_plane_data, gx_image3_end_image,
- gx_image3_flush, gx_image3_planes_wanted
- };
-
- /* Initialize an ImageType 3 image. */
- void
- gs_image3_t_init(gs_image3_t * pim, const gs_color_space * color_space,
- gs_image3_interleave_type_t interleave_type)
- {
- gs_pixel_image_t_init((gs_pixel_image_t *) pim, color_space);
- pim->type = &gs_image_type_3;
- pim->InterleaveType = interleave_type;
- gs_data_image_t_init(&pim->MaskDict, -1);
- }
-
- /*
- * We implement ImageType 3 images by interposing a mask clipper in
- * front of an ordinary ImageType 1 image. Note that we build up the
- * mask row-by-row as we are processing the image.
- *
- * We export a generalized form of the begin_image procedure for use by
- * the PDF and PostScript writers.
- */
- typedef struct gx_image3_enum_s {
- gx_image_enum_common;
- gx_device *mdev; /* gx_device_memory in default impl. */
- gx_device *pcdev; /* gx_device_mask_clip in default impl. */
- gx_image_enum_common_t *mask_info;
- gx_image_enum_common_t *pixel_info;
- gs_image3_interleave_type_t InterleaveType;
- int num_components; /* (not counting mask) */
- int bpc; /* BitsPerComponent */
- gs_memory_t *memory;
- int mask_width, mask_height, mask_full_height;
- int pixel_width, pixel_height, pixel_full_height;
- byte *mask_data; /* (if chunky) */
- byte *pixel_data; /* (if chunky) */
- /* The following are the only members that change dynamically. */
- int mask_y;
- int pixel_y;
- int mask_skip; /* # of mask rows to skip, see below */
- } gx_image3_enum_t;
-
- extern_st(st_gx_image_enum_common);
- gs_private_st_suffix_add6(st_image3_enum, gx_image3_enum_t, "gx_image3_enum_t",
- image3_enum_enum_ptrs, image3_enum_reloc_ptrs, st_gx_image_enum_common,
- mdev, pcdev, pixel_info, mask_info, pixel_data, mask_data);
-
- /* Define the default implementation of ImageType 3 processing. */
- private IMAGE3_MAKE_MID_PROC(make_mid_default); /* check prototype */
- private int
- make_mid_default(gx_device **pmidev, gx_device *dev, int width, int height,
- gs_memory_t *mem)
- {
- gx_device_memory *midev =
- gs_alloc_struct(mem, gx_device_memory, &st_device_memory,
- "make_mid_default");
- int code;
-
- if (midev == 0)
- return_error(gs_error_VMerror);
- gs_make_mem_mono_device(midev, mem, NULL);
- midev->bitmap_memory = mem;
- midev->width = width;
- midev->height = height;
- gx_device_fill_in_procs((gx_device *)midev);
- code = dev_proc(midev, open_device)((gx_device *)midev);
- if (code < 0) {
- gs_free_object(mem, midev, "make_mid_default");
- return code;
- }
- midev->is_open = true;
- dev_proc(midev, fill_rectangle)
- ((gx_device *)midev, 0, 0, width, height, (gx_color_index)0);
- *pmidev = (gx_device *)midev;
- return 0;
- }
- private IMAGE3_MAKE_MCDE_PROC(make_mcde_default); /* check prototype */
- private int
- make_mcde_default(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 *mem,
- gx_image_enum_common_t **pinfo,
- gx_device **pmcdev, gx_device *midev,
- gx_image_enum_common_t *pminfo,
- const gs_int_point *origin)
- {
- gx_device_memory *const mdev = (gx_device_memory *)midev;
- gx_device_mask_clip *mcdev =
- gs_alloc_struct(mem, gx_device_mask_clip, &st_device_mask_clip,
- "make_mcde_default");
- gx_strip_bitmap bits; /* only gx_bitmap */
- int code;
-
- if (mcdev == 0)
- return_error(gs_error_VMerror);
- bits.data = mdev->base;
- bits.raster = mdev->raster;
- bits.size.x = mdev->width;
- bits.size.y = mdev->height;
- bits.id = gx_no_bitmap_id;
- code = gx_mask_clip_initialize(mcdev, &gs_mask_clip_device,
- (const gx_bitmap *)&bits, dev,
- origin->x, origin->y, mem);
- if (code < 0) {
- gs_free_object(mem, mcdev, "make_mcde_default");
- return code;
- }
- mcdev->tiles = bits;
- code = dev_proc(mcdev, begin_typed_image)
- ((gx_device *)mcdev, pis, pmat, pic, prect, pdcolor, pcpath, mem,
- pinfo);
- if (code < 0) {
- gs_free_object(mem, mcdev, "make_mcde_default");
- return code;
- }
- *pmcdev = (gx_device *)mcdev;
- return 0;
- }
- private int
- gx_begin_image3(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 * mem, gx_image_enum_common_t ** pinfo)
- {
- return gx_begin_image3_generic(dev, pis, pmat, pic, prect, pdcolor,
- pcpath, mem, make_mid_default,
- make_mcde_default, pinfo);
- }
-
- /*
- * Begin a generic ImageType 3 image, with client handling the creation of
- * the mask image and mask clip devices.
- */
- private bool check_image3_extent(P2(floatp mask_coeff, floatp data_coeff));
- int
- gx_begin_image3_generic(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 *mem,
- image3_make_mid_proc_t make_mid,
- image3_make_mcde_proc_t make_mcde,
- gx_image_enum_common_t **pinfo)
- {
- const gs_image3_t *pim = (const gs_image3_t *)pic;
- gx_image3_enum_t *penum;
- gs_int_rect mask_rect, data_rect;
- gx_device *mdev = 0;
- gx_device *pcdev = 0;
- gs_image_t i_pixel, i_mask;
- gs_matrix mi_pixel, mi_mask, mat;
- gs_rect mrect;
- gs_int_point origin;
- int code;
-
- /* Validate the parameters. */
- if (pim->Height <= 0 || pim->MaskDict.Height <= 0)
- return_error(gs_error_rangecheck);
- switch (pim->InterleaveType) {
- default:
- return_error(gs_error_rangecheck);
- case interleave_chunky:
- if (pim->MaskDict.Width != pim->Width ||
- pim->MaskDict.Height != pim->Height ||
- pim->MaskDict.BitsPerComponent != pim->BitsPerComponent ||
- pim->format != gs_image_format_chunky
- )
- return_error(gs_error_rangecheck);
- break;
- case interleave_scan_lines:
- if (pim->MaskDict.Height % pim->Height != 0 &&
- pim->Height % pim->MaskDict.Height != 0
- )
- return_error(gs_error_rangecheck);
- /* falls through */
- case interleave_separate_source:
- if (pim->MaskDict.BitsPerComponent != 1)
- return_error(gs_error_rangecheck);
- }
- if (!check_image3_extent(pim->ImageMatrix.xx,
- pim->MaskDict.ImageMatrix.xx) ||
- !check_image3_extent(pim->ImageMatrix.xy,
- pim->MaskDict.ImageMatrix.xy) ||
- !check_image3_extent(pim->ImageMatrix.yx,
- pim->MaskDict.ImageMatrix.yx) ||
- !check_image3_extent(pim->ImageMatrix.yy,
- pim->MaskDict.ImageMatrix.yy)
- )
- return_error(gs_error_rangecheck);
- if ((code = gs_matrix_invert(&pim->ImageMatrix, &mi_pixel)) < 0 ||
- (code = gs_matrix_invert(&pim->MaskDict.ImageMatrix, &mi_mask)) < 0
- )
- return code;
- if (fabs(mi_pixel.tx - mi_mask.tx) >= 0.5 ||
- fabs(mi_pixel.ty - mi_mask.ty) >= 0.5
- )
- return_error(gs_error_rangecheck);
- {
- gs_point ep, em;
-
- if ((code = gs_point_transform(pim->Width, pim->Height, &mi_pixel,
- &ep)) < 0 ||
- (code = gs_point_transform(pim->MaskDict.Width,
- pim->MaskDict.Height, &mi_mask,
- &em)) < 0
- )
- return code;
- if (fabs(ep.x - em.x) >= 0.5 || fabs(ep.y - em.y) >= 0.5)
- return_error(gs_error_rangecheck);
- }
- penum = gs_alloc_struct(mem, gx_image3_enum_t, &st_image3_enum,
- "gx_begin_image3");
- if (penum == 0)
- return_error(gs_error_VMerror);
- penum->num_components =
- gs_color_space_num_components(pim->ColorSpace);
- gx_image_enum_common_init((gx_image_enum_common_t *) penum,
- (const gs_data_image_t *)pim,
- &image3_enum_procs, dev,
- 1 + penum->num_components,
- pim->format);
- /* Initialize pointers now in case we bail out. */
- penum->mask_data = 0;
- penum->pixel_data = 0;
- if (prect) {
- long lmw = pim->MaskDict.Width, lmh = pim->MaskDict.Height;
-
- data_rect = *prect;
- mask_rect.p.x = (int)(data_rect.p.x * lmw / pim->Width);
- mask_rect.p.y = (int)(data_rect.p.y * lmh / pim->Height);
- mask_rect.q.x = (int)((data_rect.q.x + pim->Width - 1) * lmw /
- pim->Width);
- mask_rect.q.y = (int)((data_rect.q.y + pim->Height - 1) * lmh /
- pim->Height);
- } else {
- mask_rect.p.x = mask_rect.p.y = 0;
- mask_rect.q.x = pim->MaskDict.Width;
- mask_rect.q.y = pim->MaskDict.Height;
- data_rect.p.x = data_rect.p.y = 0;
- data_rect.q.x = pim->Width;
- data_rect.q.y = pim->Height;
- }
- penum->mask_width = mask_rect.q.x - mask_rect.p.x;
- penum->mask_height = mask_rect.q.y - mask_rect.p.y;
- penum->mask_full_height = pim->MaskDict.Height;
- penum->mask_y = 0;
- penum->mask_skip = 0;
- penum->pixel_width = data_rect.q.x - data_rect.p.x;
- penum->pixel_height = data_rect.q.y - data_rect.p.y;
- penum->pixel_full_height = pim->Height;
- penum->pixel_y = 0;
- penum->mask_info = 0;
- penum->pixel_info = 0;
- if (pim->InterleaveType == interleave_chunky) {
- /* Allocate row buffers for the mask and pixel data. */
- penum->pixel_data =
- gs_alloc_bytes(mem,
- (penum->pixel_width * pim->BitsPerComponent *
- penum->num_components + 7) >> 3,
- "gx_begin_image3(pixel_data)");
- penum->mask_data =
- gs_alloc_bytes(mem, (penum->mask_width + 7) >> 3,
- "gx_begin_image3(mask_data)");
- if (penum->pixel_data == 0 || penum->mask_data == 0) {
- code = gs_note_error(gs_error_VMerror);
- goto out1;
- }
- }
- penum->InterleaveType = pim->InterleaveType;
- penum->bpc = pim->BitsPerComponent;
- penum->memory = mem;
- mrect.p.x = mrect.p.y = 0;
- mrect.q.x = pim->MaskDict.Width;
- mrect.q.y = pim->MaskDict.Height;
- if (pmat == 0)
- pmat = &ctm_only(pis);
- if ((code = gs_matrix_multiply(&mi_mask, pmat, &mat)) < 0 ||
- (code = gs_bbox_transform(&mrect, &mat, &mrect)) < 0
- )
- return code;
- origin.x = floor(mrect.p.x);
- origin.y = floor(mrect.p.y);
- code = make_mid(&mdev, dev, (int)ceil(mrect.q.x) - origin.x,
- (int)ceil(mrect.q.y) - origin.y, mem);
- if (code < 0)
- goto out1;
- penum->mdev = mdev;
- gs_image_t_init_mask(&i_mask, false);
- i_mask.adjust = false;
- {
- const gx_image_type_t *type1 = i_mask.type;
-
- *(gs_data_image_t *)&i_mask = pim->MaskDict;
- i_mask.type = type1;
- i_mask.BitsPerComponent = 1;
- }
- {
- gx_drawing_color dcolor;
- gs_matrix m_mat;
-
- color_set_pure(&dcolor, 1);
- /*
- * Adjust the translation for rendering the mask to include a
- * negative translation by origin.{x,y} in device space.
- */
- m_mat = *pmat;
- m_mat.tx -= origin.x;
- m_mat.ty -= origin.y;
- /*
- * Note that pis = NULL here, since we don't want to have to
- * create another imager state with default log_op, etc.
- */
- code = gx_device_begin_typed_image(mdev, NULL, &m_mat,
- (const gs_image_common_t *)&i_mask,
- &mask_rect, &dcolor, NULL, mem,
- &penum->mask_info);
- if (code < 0)
- goto out2;
- }
- gs_image_t_init(&i_pixel, pim->ColorSpace);
- {
- const gx_image_type_t *type1 = i_pixel.type;
-
- *(gs_pixel_image_t *)&i_pixel = *(const gs_pixel_image_t *)pim;
- i_pixel.type = type1;
- }
- code = make_mcde(dev, pis, pmat, (const gs_image_common_t *)&i_pixel,
- prect, pdcolor, pcpath, mem, &penum->pixel_info,
- &pcdev, mdev, penum->mask_info, &origin);
- if (code < 0)
- goto out3;
- penum->pcdev = pcdev;
- /*
- * Set num_planes, plane_widths, and plane_depths from the values in the
- * enumerators for the mask and the image data.
- */
- switch (pim->InterleaveType) {
- case interleave_chunky:
- /* Add the mask data to the depth of the image data. */
- penum->num_planes = 1;
- penum->plane_widths[0] = pim->Width;
- penum->plane_depths[0] =
- penum->pixel_info->plane_depths[0] *
- (penum->num_components + 1) / penum->num_components;
- break;
- case interleave_scan_lines:
- /*
- * There is only 1 plane, with dynamically changing width & depth.
- * Initialize it for the mask data, since that is what will be
- * read first.
- */
- penum->num_planes = 1;
- penum->plane_depths[0] = 1;
- penum->plane_widths[0] = pim->MaskDict.Width;
- break;
- case interleave_separate_source:
- /* Insert the mask data as a separate plane before the image data. */
- penum->num_planes = penum->pixel_info->num_planes + 1;
- penum->plane_widths[0] = pim->MaskDict.Width;
- penum->plane_depths[0] = 1;
- memcpy(&penum->plane_widths[1], &penum->pixel_info->plane_widths[0],
- (penum->num_planes - 1) * sizeof(penum->plane_widths[0]));
- memcpy(&penum->plane_depths[1], &penum->pixel_info->plane_depths[0],
- (penum->num_planes - 1) * sizeof(penum->plane_depths[0]));
- break;
- }
- gx_device_retain(mdev, true); /* will free explicitly */
- gx_device_retain(pcdev, true); /* ditto */
- *pinfo = (gx_image_enum_common_t *) penum;
- return 0;
- out3:
- gx_image_end(penum->mask_info, false);
- out2:
- gs_closedevice(mdev);
- gs_free_object(mem, mdev, "gx_begin_image3(mdev)");
- out1:
- gs_free_object(mem, penum->mask_data, "gx_begin_image3(mask_data)");
- gs_free_object(mem, penum->pixel_data, "gx_begin_image3(pixel_data)");
- gs_free_object(mem, penum, "gx_begin_image3");
- return code;
- }
- private bool
- check_image3_extent(floatp mask_coeff, floatp data_coeff)
- {
- if (mask_coeff == 0)
- return data_coeff == 0;
- if (data_coeff == 0 || (mask_coeff > 0) != (data_coeff > 0))
- return false;
- return true;
- }
-
- /*
- * Return > 0 if we want more mask now, < 0 if we want more data now,
- * 0 if we want both.
- */
- private int
- planes_next(const gx_image3_enum_t *penum)
- {
- /*
- * The invariant we need to maintain is that we always have at least as
- * much mask as pixel data, i.e., mask_y / mask_full_height >=
- * pixel_y / pixel_full_height, or, to avoid floating point,
- * mask_y * pixel_full_height >= pixel_y * mask_full_height.
- * We know this condition is true now;
- * return a value that indicates how to maintain it.
- */
- int mask_h = penum->mask_full_height;
- int pixel_h = penum->pixel_full_height;
- long current = penum->pixel_y * (long)mask_h -
- penum->mask_y * (long)pixel_h;
-
- #ifdef DEBUG
- if (current > 0)
- lprintf4("planes_next invariant fails: %d/%d > %d/%d\n",
- penum->pixel_y, penum->pixel_full_height,
- penum->mask_y, penum->mask_full_height);
- #endif
- return ((current += mask_h) <= 0 ? -1 :
- current - pixel_h <= 0 ? 0 : 1);
- }
-
- /* Process the next piece of an ImageType 3 image. */
- private int
- gx_image3_plane_data(gx_image_enum_common_t * info,
- const gx_image_plane_t * planes, int height,
- int *rows_used)
- {
- gx_image3_enum_t *penum = (gx_image3_enum_t *) info;
- int pixel_height = penum->pixel_height;
- int pixel_used = 0;
- int mask_height = penum->mask_height;
- int mask_used = 0;
- int h1 = max(pixel_height - penum->pixel_y, mask_height - penum->mask_y);
- int h = min(height, h1);
- const gx_image_plane_t *pixel_planes;
- gx_image_plane_t pixel_plane, mask_plane;
- int code = 0;
-
- /* Initialized rows_used in case we get an error. */
- *rows_used = 0;
- switch (penum->InterleaveType) {
- case interleave_chunky:
- if (h <= 0)
- return 0;
- if (h > 1) {
- /* Do the operation one row at a time. */
- int h_orig = h;
-
- mask_plane = planes[0];
- do {
- code = gx_image3_plane_data(info, &mask_plane, 1,
- rows_used);
- h -= *rows_used;
- if (code)
- break;
- mask_plane.data += mask_plane.raster;
- } while (h);
- *rows_used = h_orig - h;
- return code;
- } {
- /* Pull apart the source data and the mask data. */
- int bpc = penum->bpc;
- int num_components = penum->num_components;
- int width = penum->pixel_width;
-
- /* We do this in the simplest (not fastest) way for now. */
- uint bit_x = bpc * (num_components + 1) * planes[0].data_x;
-
- sample_load_declare_setup(sptr, sbit,
- planes[0].data + (bit_x >> 3),
- bit_x & 7, bpc);
- sample_store_declare_setup(mptr, mbit, mbbyte,
- penum->mask_data, 0, 1);
- sample_store_declare_setup(pptr, pbit, pbbyte,
- penum->pixel_data, 0, bpc);
- int x;
-
- mask_plane.data = mptr;
- mask_plane.data_x = 0;
- /* raster doesn't matter */
- pixel_plane.data = pptr;
- pixel_plane.data_x = 0;
- /* raster doesn't matter */
- pixel_planes = &pixel_plane;
- for (x = 0; x < width; ++x) {
- uint value;
- int i;
-
- sample_load_next12(value, sptr, sbit, bpc);
- sample_store_next12(value != 0, mptr, mbit, 1, mbbyte);
- for (i = 0; i < num_components; ++i) {
- sample_load_next12(value, sptr, sbit, bpc);
- sample_store_next12(value, pptr, pbit, bpc, pbbyte);
- }
- }
- sample_store_flush(mptr, mbit, 1, mbbyte);
- sample_store_flush(pptr, pbit, bpc, pbbyte);
- }
- break;
- case interleave_scan_lines:
- if (planes_next(penum) >= 0) {
- /* This is mask data. */
- mask_plane = planes[0];
- pixel_planes = &pixel_plane;
- pixel_plane.data = 0;
- } else {
- /* This is pixel data. */
- mask_plane.data = 0;
- pixel_planes = planes;
- }
- break;
- case interleave_separate_source:
- /*
- * In order to be able to recover from interruptions, we must
- * limit separate-source processing to 1 scan line at a time.
- */
- if (h > 1)
- h = 1;
- mask_plane = planes[0];
- pixel_planes = planes + 1;
- break;
- default: /* not possible */
- return_error(gs_error_rangecheck);
- }
- /*
- * Process the mask data first, so it will set up the mask
- * device for clipping the pixel data.
- */
- if (mask_plane.data) {
- /*
- * If, on the last call, we processed some mask rows successfully
- * but processing the pixel rows was interrupted, we set rows_used
- * to indicate the number of pixel rows processed (since there is
- * no way to return two rows_used values). If this happened, some
- * mask rows may get presented again. We must skip over them
- * rather than processing them again.
- */
- int skip = penum->mask_skip;
-
- if (skip >= h) {
- penum->mask_skip = skip - (mask_used = h);
- } else {
- int mask_h = h - skip;
-
- mask_plane.data += skip * mask_plane.raster;
- penum->mask_skip = 0;
- code = gx_image_plane_data_rows(penum->mask_info, &mask_plane,
- mask_h, &mask_used);
- mask_used += skip;
- }
- *rows_used = mask_used;
- penum->mask_y += mask_used;
- if (code < 0)
- return code;
- }
- if (pixel_planes[0].data) {
- /*
- * If necessary, flush any buffered mask data to the mask clipping
- * device.
- */
- gx_image_flush(penum->mask_info);
- code = gx_image_plane_data_rows(penum->pixel_info, pixel_planes, h,
- &pixel_used);
- /*
- * There isn't any way to set rows_used if different amounts of
- * the mask and pixel data were used. Fake it.
- */
- *rows_used = pixel_used;
- /*
- * Don't return code yet: we must account for the fact that
- * some mask data may have been processed.
- */
- penum->pixel_y += pixel_used;
- if (code < 0) {
- /*
- * We must prevent the mask data from being processed again.
- * We rely on the fact that h > 1 is only possible if the
- * mask and pixel data have the same Y scaling.
- */
- if (mask_used > pixel_used) {
- int skip = mask_used - pixel_used;
-
- penum->mask_skip = skip;
- penum->mask_y -= skip;
- mask_used = pixel_used;
- }
- }
- }
- if_debug5('b', "[b]image3 h=%d %smask_y=%d %spixel_y=%d\n",
- h, (mask_plane.data ? "+" : ""), penum->mask_y,
- (pixel_planes[0].data ? "+" : ""), penum->pixel_y);
- if (penum->mask_y >= penum->mask_height &&
- penum->pixel_y >= penum->pixel_height)
- return 1;
- if (penum->InterleaveType == interleave_scan_lines) {
- /* Update the width and depth in the enumerator. */
- if (planes_next(penum) >= 0) { /* want mask data next */
- penum->plane_widths[0] = penum->mask_width;
- penum->plane_depths[0] = 1;
- } else { /* want pixel data next */
- penum->plane_widths[0] = penum->pixel_width;
- penum->plane_depths[0] = penum->pixel_info->plane_depths[0];
- }
- }
- /*
- * The mask may be complete (gx_image_plane_data_rows returned 1),
- * but there may still be pixel rows to go, so don't return 1 here.
- */
- return (code < 0 ? code : 0);
- }
-
- /* Flush buffered data. */
- private int
- gx_image3_flush(gx_image_enum_common_t * info)
- {
- gx_image3_enum_t * const penum = (gx_image3_enum_t *) info;
- int code = gx_image_flush(penum->mask_info);
-
- if (code >= 0)
- code = gx_image_flush(penum->pixel_info);
- return code;
- }
-
- /* Determine which data planes are wanted. */
- private bool
- gx_image3_planes_wanted(const gx_image_enum_common_t * info, byte *wanted)
- {
- const gx_image3_enum_t * const penum = (const gx_image3_enum_t *) info;
-
- switch (penum->InterleaveType) {
- case interleave_chunky: /* only 1 plane */
- wanted[0] = 0xff;
- return true;
- case interleave_scan_lines: /* only 1 plane, but varying width/depth */
- wanted[0] = 0xff;
- return false;
- case interleave_separate_source: {
- /*
- * We always want at least as much of the mask to be filled as the
- * pixel data. next > 0 iff we've processed more data than mask.
- * Plane 0 is the mask, planes [1 .. num_planes - 1] are pixel data.
- */
- int next = planes_next(penum);
-
- wanted[0] = (next >= 0 ? 0xff : 0);
- memset(wanted + 1, (next <= 0 ? 0xff : 0), info->num_planes - 1);
- /*
- * In principle, wanted will always be true for both mask and pixel
- * data if the full_heights are equal. Unfortunately, even in this
- * case, processing may be interrupted after a mask row has been
- * passed to the underlying image processor but before the data row
- * has been passed, in which case pixel data will be 'wanted', but
- * not mask data, for the next call. Therefore, we must return
- * false.
- */
- return false
- /*(next == 0 &&
- penum->mask_full_height == penum->pixel_full_height)*/;
- }
- default: /* can't happen */
- memset(wanted, 0, info->num_planes);
- return false;
- }
- }
-
- /* Clean up after processing an ImageType 3 image. */
- private int
- gx_image3_end_image(gx_image_enum_common_t * info, bool draw_last)
- {
- gx_image3_enum_t *penum = (gx_image3_enum_t *) info;
- gs_memory_t *mem = penum->memory;
- gx_device *mdev = penum->mdev;
- int mcode = gx_image_end(penum->mask_info, draw_last);
- gx_device *pcdev = penum->pcdev;
- int pcode = gx_image_end(penum->pixel_info, draw_last);
-
- gs_closedevice(pcdev);
- gs_closedevice(mdev);
- gs_free_object(mem, penum->mask_data,
- "gx_image3_end_image(mask_data)");
- gs_free_object(mem, penum->pixel_data,
- "gx_image3_end_image(pixel_data)");
- gs_free_object(mem, pcdev, "gx_image3_end_image(pcdev)");
- gs_free_object(mem, mdev, "gx_image3_end_image(mdev)");
- gs_free_object(mem, penum, "gx_image3_end_image");
- return (pcode < 0 ? pcode : mcode);
- }
-