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Diffstat (limited to 'pcl/pccolor.c')
| -rw-r--r-- | pcl/pccolor.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/pcl/pccolor.c b/pcl/pccolor.c new file mode 100644 index 000000000..52c651cf2 --- /dev/null +++ b/pcl/pccolor.c @@ -0,0 +1,181 @@ +/* Portions Copyright (C) 2001 artofcode LLC. + Portions Copyright (C) 1996, 2001 Artifex Software Inc. + Portions Copyright (C) 1988, 2000 Aladdin Enterprises. + This software is based in part on the work of the Independent JPEG Group. + All Rights Reserved. + + This software is distributed under license and may not be copied, modified + or distributed except as expressly authorized under the terms of that + license. Refer to licensing information at http://www.artifex.com/ or + contact Artifex Software, Inc., 101 Lucas Valley Road #110, + San Rafael, CA 94903, (415)492-9861, for further information. */ +/*$Id$ */ + +/* pccolor.c - commands to add colors to a PCL palette */ +#include "std.h" +#include "pcommand.h" +#include "pcstate.h" +#include "pcpalet.h" + +/* + * Prior to being assigned into a palette, the PCL color component values are + * simple globals; they are not saved and restored with the PCL state. + * + * This implies that color components may not be converted until the set + * color index command is executed, as it is not possible to predict for + * which palette they will be used. + * + * NB: contrary to the documentation, all of the set color component commands + * and the assign color index command are allowed but ignored in graphics + * mode (i.e.: they do NOT end graphics mode, as one would expect from the + * documentation). + */ + +/* + * ESC * v <cc> A + */ + static int +set_color_comp_1( + pcl_args_t * pargs, + pcl_state_t * pcs +) +{ + if ( pcs->personality == pcl5e ) + return 0; + if (!pcs->raster_state.graphics_mode) + pcs->color_comps[0] = float_arg(pargs); + return 0; +} + +/* + * ESC * v <cc> B + */ + static int +set_color_comp_2( + pcl_args_t * pargs, + pcl_state_t * pcs +) +{ + if ( pcs->personality == pcl5e ) + return 0; + if (!pcs->raster_state.graphics_mode) + pcs->color_comps[1] = float_arg(pargs); + return 0; +} + +/* + * ESC * v <cc> C + */ + static int +set_color_comp_3( + pcl_args_t * pargs, + pcl_state_t * pcs +) +{ + if ( pcs->personality == pcl5e ) + return 0; + if (!pcs->raster_state.graphics_mode) + pcs->color_comps[2] = float_arg(pargs); + return 0; +} + +/* + * ESC * v <indx> I + * + * Set a color into the active palette. + * + * This implementation matches HP's documentation, in that out-of-range indices + * will not affect the palette, but will reset the color component registers. + * This matches the behavior of the HP Color Laser Jet 5/5M, but not that of + * the HP DeskJet 1600C/CM. For the latter, negative indices are ignored and + * the color component registers are NOT cleared, while positive indices are + * interpreted modulo the palette size. + */ + static int +assign_color_index( + pcl_args_t * pargs, + pcl_state_t * pcs +) +{ + int indx = int_arg(pargs); + + if ( pcs->personality == pcl5e ) + return 0; + if (!pcs->raster_state.graphics_mode) { + if ((indx >= 0) && (indx < pcl_palette_get_num_entries(pcs->ppalet))) + pcl_palette_set_color(pcs, indx, pcs->color_comps); + pcs->color_comps[0] = 0.0; + pcs->color_comps[1] = 0.0; + pcs->color_comps[2] = 0.0; + } + return 0; +} + +/* + * Initialization + */ + static int +color_do_registration( + pcl_parser_state_t *pcl_parser_state, + gs_memory_t * pmem +) +{ + /* Register commands */ + DEFINE_CLASS('*') + { + 'v', 'A', + PCL_COMMAND( "Color Component 1", + set_color_comp_1, + pca_neg_ok | pca_big_error | pca_raster_graphics | pca_in_rtl + ) + }, + { + 'v', 'B', + PCL_COMMAND( "Color Component 2", + set_color_comp_2, + pca_neg_ok | pca_big_error | pca_raster_graphics | pca_in_rtl + ) + }, + { + 'v', 'C', + PCL_COMMAND( "Color Component 3", + set_color_comp_3, + pca_neg_ok | pca_big_error | pca_raster_graphics | pca_in_rtl + ) + }, + { + 'v', 'I', + PCL_COMMAND( "Assign Color Index", + assign_color_index, + pca_neg_ok | pca_big_ignore | pca_raster_graphics | pca_in_rtl + ) + }, + END_CLASS + return 0; +} + +/* + * Handle the various forms of reset. + */ + static void +color_do_reset( + pcl_state_t * pcs, + pcl_reset_type_t type +) +{ + static const uint mask = ( pcl_reset_initial + | pcl_reset_cold + | pcl_reset_printer ); + + if ((type & mask) != 0) { + pcs->color_comps[0] = 0.0; + pcs->color_comps[1] = 0.0; + pcs->color_comps[2] = 0.0; + } +} + +/* + * There is no copy operation for this module, as the color components are + * just globals. + */ +const pcl_init_t pcl_color_init = { color_do_registration, color_do_reset, 0 }; |