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Diffstat (limited to 'doc/gdevds32.c')
| -rw-r--r-- | doc/gdevds32.c | 255 |
1 files changed, 0 insertions, 255 deletions
diff --git a/doc/gdevds32.c b/doc/gdevds32.c deleted file mode 100644 index a59ea7a6..00000000 --- a/doc/gdevds32.c +++ /dev/null @@ -1,255 +0,0 @@ -/* Copyright (C) 2001-2021 Artifex Software, Inc. - All Rights Reserved. - - This software is provided AS-IS with no warranty, either express or - implied. - - This software is distributed under license and may not be copied, - modified or distributed except as expressly authorized under the terms - of the license contained in the file LICENSE in this distribution. - - Refer to licensing information at http://www.artifex.com or contact - Artifex Software, Inc., 1305 Grant Avenue - Suite 200, Novato, - CA 94945, U.S.A., +1(415)492-9861, for further information. -*/ - -/* ds32 device:32-bit CMYK TIFF device (downscaled output - * from 32-bit CMYK internal rendering) - * Supports downscaler options similar to the tiffscaled32 device such - * as DownScaleFactor, PostRenderProfile, TrapX, TrapY,and TrapOrder. - * - * No file is written (except for a debug mode that writes a PAM32 file) - * so that raster lines can be passed in memory to a user function. - */ - -#include "stdint_.h" -#include "gdevprn.h" -#include "gxiodev.h" -#include "stdio_.h" -#include "ctype_.h" -#include "gxgetbit.h" -#include "gsicc_cache.h" -#include "gscms.h" -#include "gxdownscale.h" -#include "gp.h" - -/******************************************************************************** - The following section can be added to the end of device/devs.mak - -### -------- Example 32-bit CMYK downscaled device --------------------- ### -# NB: downscale_ is standard in the lib (LIB1s) -$(DD)ds32.dev : $(DEVOBJ)gdevds32.$(OBJ) $(GLD)page.dev $(GDEV) $(DEVS_MAK) $(MAKEDIRS) - $(SETPDEV2) $(DD)ds32 $(DEVOBJ)gdevds32.$(OBJ) - $(ADDMOD) $(DD)ds32 -include $(GLD)page - -$(DEVOBJ)gdevds32.$(OBJ) : $(DEVSRC)gdevds32.c $(gsicc_cache_h) $(gxdownscale_h) $(AK) \ - $(arch_h) $(gdevprn_h) $(stdio__h) $(stdint__h) $(DEVS_MAK) $(MAKEDIRS) - $(DEVCC) $(DEVO_)gdevds32.$(OBJ) $(C_) $(DEVSRC)gdevds32.c - -***************** END OF devs.mak INSERTION *************************************/ - -/* - Once that is added, then rebuild Ghostscript, for example, on linux: - - make DEVICE_DEVS_EXTRA=obj/ds32.dev - - or, on Windows: - - nmake -f psi/msvc32.mak DEVICE_DEVS_EXTRA=obj\ds32.dev - -*/ - -/* ------ The device descriptors ------ */ - -/* Default X and Y resolution */ -#define X_DPI 72 -#define Y_DPI 72 - -/* ------ The ds32 device ------ */ - -static dev_proc_print_page(ds32_print_page); -static dev_proc_get_params(ds32_get_params_downscale_cmyk); -static dev_proc_put_params(ds32_put_params_downscale_cmyk); - -static const gx_device_procs ds32_procs = { - gdev_prn_open, NULL, NULL, gdev_prn_bg_output_page, gdev_prn_close, - NULL, cmyk_8bit_map_color_rgb, - NULL, NULL, NULL, NULL, NULL, NULL, - ds32_get_params_downscale_cmyk, - ds32_put_params_downscale_cmyk, - cmyk_8bit_map_cmyk_color, - NULL, NULL, NULL, gx_page_device_get_page_device -}; - -typedef struct gx_device_ds32_s { - gx_device_common; - gx_prn_device_common; - gx_downscaler_params downscale; - gsicc_link_t *icclink; -} gx_device_ds32; - -const gx_device_ds32 gs_ds32_device = { - prn_device_body(gx_device_ds32, - ds32_procs, - "ds32", - DEFAULT_WIDTH_10THS, DEFAULT_HEIGHT_10THS, - 600, 600, /* 600 dpi by default */ - 0, 0, 0, 0, /* Margins */ - 4, /* num components */ - 32, /* bits per sample */ - 255, 255, 256, 256, - ds32_print_page), - GX_DOWNSCALER_PARAMS_DEFAULTS, - 0 /* icclink for PostRenderProfile */ -}; - -static int -ds32_get_params_downscale_cmyk(gx_device * dev, gs_param_list * plist) -{ - gx_device_ds32 *const dsdev = (gx_device_ds32 *)dev; - int code = gdev_prn_get_params(dev, plist); - int ecode = code; - - code = gx_downscaler_write_params(plist, &dsdev->downscale, - GX_DOWNSCALER_PARAMS_MFS | - GX_DOWNSCALER_PARAMS_TRAP); - if (code < 0) { - ecode = code; - } - return ecode; -} - -static int -ds32_put_params_downscale_cmyk(gx_device * dev, gs_param_list * plist) -{ - gx_device_ds32 *const dsdev = (gx_device_ds32 *)dev; - int code, ecode; - - code = gx_downscaler_read_params(plist, &dsdev->downscale, - (GX_DOWNSCALER_PARAMS_MFS | - GX_DOWNSCALER_PARAMS_TRAP)); - if (code < 0) - { - ecode = code; - } - if (ecode < 0) - return ecode; - code = gdev_prn_put_params(dev, plist); - return code; -} - -/* below is copied (renamed) from tiff_chunky_post_cm */ -static int ds32_chunky_post_cm(void *arg, byte **dst, byte **src, int w, int h, - int raster) -{ - gsicc_bufferdesc_t input_buffer_desc, output_buffer_desc; - gsicc_link_t *icclink = (gsicc_link_t*)arg; - - /* - void gsicc_init_buffer(gsicc_bufferdesc_t *buffer_desc, unsigned char num_chan, - unsigned char bytes_per_chan, bool has_alpha, bool alpha_first, - bool is_planar, int plane_stride, int row_stride, int num_rows, - int pixels_per_row); - */ - gsicc_init_buffer(&input_buffer_desc, icclink->num_input, 1, false, - false, false, 0, raster, h, w); - gsicc_init_buffer(&output_buffer_desc, icclink->num_output, 1, false, - false, false, 0, raster, h, w); - icclink->procs.map_buffer(NULL, icclink, &input_buffer_desc, &output_buffer_desc, - src[0], dst[0]); - return 0; -} - -#define WRITE_PAM32 /* for debugging */ - -#ifdef WRITE_PAM32 /* debugging code to write a PAM 32 file. */ -static int -debug_write_pam_32(gx_device_ds32 *dsdev, byte *data, int row, FILE *file) -{ - int code = 0; - - if (row == 0) { - /* PAM "magic" ID == 7 */ - code = fprintf(file, "P7\nWIDTH %d\nHEIGHT %d\nDEPTH 4\nMAXVAL 255\nTUPLTYPE CMYK\n" - "# Image generated by GPL Ghostscript GIT PRERELEASE\nENDHDR\n", - dsdev->width, dsdev->height); - if (code < 0) - code = gs_error_ioerror; - } - if (code < 0 || fwrite(data, 1, 4*dsdev->width, file) != 4*dsdev->width) - code = gs_error_ioerror; - - return code; -} -#endif - -static int -ds32_print_page(gx_device_printer * pdev, FILE * file) -{ - gx_device_ds32 *const dsdev = (gx_device_ds32 *)pdev; - int code = 0; - byte *data = NULL; - int size = gdev_mem_bytes_per_scan_line((gx_device *)pdev); - int row; - int factor = dsdev->downscale.downscale_factor; - int height = pdev->height / factor; - int bpc = 8; - int num_comps = 4; - int trap_w = dsdev->downscale.trap_w; - int trap_h = dsdev->downscale.trap_h; - int *trap_order = dsdev->downscale.trap_order; - gx_downscaler_t ds; - - if (dsdev->icclink == NULL) { - code = gx_downscaler_init(&ds, (gx_device *)pdev, - 8, bpc, num_comps, - &dsdev->downscale, - &fax_adjusted_width, 0 /*aw*/); - } else { - code = gx_downscaler_init_cm(&ds, (gx_device *)pdev, - 8, bpc, num_comps, - &dsdev->downscale, - &fax_adjusted_width, 0, /*aw*/ - ds32_chunky_post_cm, dsdev->icclink, - dsdev->icclink->num_output); - } - if (code < 0) - return code; - - data = gs_alloc_bytes(pdev->memory, size, "ds32_print_page(data)"); - if (data == NULL) { - gx_downscaler_fin(&ds); - return_error(gs_error_VMerror); - } - - for (row = 0; row < height && code >= 0; row++) { - code = gx_downscaler_getbits(&ds, data, row); - if (code < 0) - break; -#ifdef WRITE_PAM32 /* debugging code to write a PAM 32 file. */ - if ((code = debug_write_pam_32(dsdev, data, row, file)) < 0) - break; -#endif - /*************************************************************/ - /* User code to handle the row of data (dsdev->width bytes) */ - /* Set code to a negative value (e.g. gs_error_ioerror) if a */ - /* problem occurs. */ - /* Note that nothing needs to be written to 'file' and this */ - /* can be set to '-' (stdout) to avoid leaving an empty file */ - /* if (row == 0) can be used to perform any initialization */ - /* needed to process the user data */ - /*************************************************************/ - - if (code < 0) - break; - } - - /**************************************************************/ - /* User code to finish writing and perform any cleanup needed */ - /**************************************************************/ - - gx_downscaler_fin(&ds); - gs_free_object(pdev->memory, data, "tiff_print_page(data)"); - - return code; -} |