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San Rafael, CA 94903, U.S.A., +1(415)492-9861, for further information.
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/* $Id: gxclist.h 8369 2007-11-15 07:22:43Z leonardo $ */
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/* $Id: gxclist.h 8862 2008-07-22 06:24:14Z leonardo $ */
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/* Command list definitions for Ghostscript. */
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/* Requires gxdevice.h and gxdevmem.h */
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gx_band_page_info_t page_info; /* page information */\
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int nbands /* # of bands */
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* Chech whether a clist is used for storing a pattern command stream.
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* Useful for both reader and writer.
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#define IS_CLIST_FOR_PATTERN(cdev) (cdev->procs.open_device == pattern_clist_open_device)
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typedef struct gx_device_clist_common_s {
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gx_device_clist_common_members;
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} gx_device_clist_common;
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/* (Strokes with longer patterns are converted to fills.) */
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#define cmd_max_dash 11
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/* Define a clist cropping buffer,
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which represents a cropping stack element while clist writing. */
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typedef struct clist_writer_cropping_buffer_s clist_writer_cropping_buffer_t;
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struct clist_writer_cropping_buffer_s {
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int cropping_min, cropping_max;
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uint mask_id, temp_mask_id;
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clist_writer_cropping_buffer_t *next;
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#define private_st_clist_writer_cropping_buffer()\
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gs_private_st_ptrs1(st_clist_writer_cropping_buffer,\
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clist_writer_cropping_buffer_t, "clist_writer_transparency_buffer",\
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clist_writer_cropping_buffer_enum_ptrs, clist_writer_cropping_buffer_reloc_ptrs, next)
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/* Define the state of a band list when writing. */
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typedef struct clist_color_space_s {
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byte byte1; /* see cmd_opv_set_color_space in gxclpath.h */
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gs_id id; /* space->id for comparisons */
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const gs_color_space *space;
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} clist_color_space_t;
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typedef struct gx_device_clist_writer_s {
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struct gx_device_clist_writer_s {
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gx_device_clist_common_members; /* (must be first) */
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int error_code; /* error returned by cmd_put_op */
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gx_clist_state *states; /* current state of each band */
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proc_free_up_bandlist_memory((*free_up_bandlist_memory)); /* if nz, proc to free some bandlist memory */
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int disable_mask; /* mask of routines to disable clist_disable_xxx */
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gs_pattern1_instance_t *pinst; /* Used when it is a pattern clist. */
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bool cropping_by_path;
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int cropping_min, cropping_max;
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int save_cropping_min, save_cropping_max;
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clist_writer_cropping_buffer_t *cropping_stack;
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} gx_device_clist_writer;
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uint temp_mask_id; /* Mask id of a mask of an image with SMask. */
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#ifndef gx_device_clist_writer_DEFINED
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#define gx_device_clist_writer_DEFINED
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typedef struct gx_device_clist_writer_s gx_device_clist_writer;
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/* Bits for gx_device_clist_writer.disable_mask. Bit set disables behavior */
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#define clist_disable_fill_path (1 << 0)
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#define clist_disable_pass_thru_params (1 << 5) /* disable EXCEPT at top of page */
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#define clist_disable_copy_alpha (1 << 6) /* target does not support copy_alpha */
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#ifndef clist_render_thread_control_t_DEFINED
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# define clist_render_thread_control_t_DEFINED
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typedef struct clist_render_thread_control_s clist_render_thread_control_t;
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/* Define the state of a band list when reading. */
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/* For normal rasterizing, pages and num_pages are both 0. */
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typedef struct gx_device_clist_reader_s {
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gx_band_complexity_t *band_complexity_array; /* num_bands elements */
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void *offset_map; /* Just against collecting the map as garbage. */
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int num_render_threads; /* number of threads being used */
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clist_render_thread_control_t *render_threads; /* array of threads */
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byte *main_thread_data; /* saved data pointer of main thread */
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int curr_render_thread; /* index into array */
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int thread_lookahead_direction; /* +1 or -1 */
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} gx_device_clist_reader;
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union gx_device_clist_s {
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"gx_device_clist", 0, device_clist_enum_ptrs, device_clist_reloc_ptrs,\
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gx_device_finalize)
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#define st_device_clist_max_ptrs\
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(st_device_forward_max_ptrs + st_imager_state_num_ptrs + 3)
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(st_device_forward_max_ptrs + st_imager_state_num_ptrs + 4)
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#define CLIST_IS_WRITER(cdev) ((cdev)->common.ymin < 0)
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clist_copy_band_complexity(gx_band_complexity_t *this, const gx_band_complexity_t *from);
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/* Retrieve total size for cfile and bfile. */
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int clist_data_size(const gx_device_clist *cdev, int select);
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/* Get command list data. */
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int clist_get_data(const gx_device_clist *cdev, int select, int offset, byte *buf, int length);
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/* Put command list data. */
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int clist_put_data(const gx_device_clist *cdev, int select, int offset, const byte *buf, int length);
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/* Exports from gxclread used by the multi-threading logic */
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/* Initialize for reading. */
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int clist_render_init(gx_device_clist *dev);
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clist_close_writer_and_init_reader(gx_device_clist *cldev);
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clist_select_render_plane(gx_device *dev, int y, int height,
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gx_render_plane_t *render_plane, int index);
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int clist_rasterize_lines(gx_device *dev, int y, int lineCount,
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const gx_render_plane_t *render_plane,
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/* Enable multi threaded rendering. Returns > 0 if supported, < 0 if single threaded */
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clist_enable_multi_thread_render(gx_device *dev);
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/* Shutdown render threads and free up the related memory */
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clist_teardown_render_threads(gx_device *dev);
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#define clist_debug_rect clist_debug_rect_imp
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void clist_debug_rect_imp(int x, int y, int width, int height);
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#define clist_debug_set_ctm (void)
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/* Cropping by Y is necessary when the shading path is smaller than shading.
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In this case the clipping path is written into the path's bands only.
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Thus bands outside the shading path are not clipped,
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but the shading may paint into them, so use this macro to crop them.
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Besides that, cropping by Y is necessary when a transparency compositor
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is installed over clist writer. Transparency compositors change the number
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of device color components, so transparency group's elements
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must not paint to bands that are not covered by the transparency bbox
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to prevent a failure when clist reader recieves a wrong number of color components.
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#define crop_fill_y(cdev, ry, rheight)\
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if (ry < cdev->cropping_min) {\
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rheight = ry + rheight - cdev->cropping_min;\
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ry = cdev->cropping_min;\
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if (ry + rheight > cdev->cropping_max)\
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rheight = cdev->cropping_max - ry;\
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#define crop_fill(dev, x, y, w, h)\
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fit_fill_w(dev, x, w);\
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crop_fill_y(dev, y, h);\
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#define crop_copy_y(cdev, data, data_x, raster, id, ry, rheight)\
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if (ry < cdev->cropping_min) {\
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rheight = ry + rheight - cdev->cropping_min;\
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data += (cdev->cropping_min - ry) * raster;\
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id = gx_no_bitmap_id;\
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ry = cdev->cropping_min;\
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if (ry + rheight > cdev->cropping_max)\
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rheight = cdev->cropping_max - ry;\
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#define crop_copy(dev, data, data_x, raster, id, x, y, w, h)\
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w += x, data_x -= x, x = 0;\
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fit_fill_w(dev, x, w);\
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crop_copy_y(dev, data, data_x, raster, id, y, h);\
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#endif /* gxclist_INCLUDED */
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src/gxclist.h
