/* Copyright (C) 1999 Aladdin Enterprises.  All rights reserved.
  
  This program is free software; you can redistribute it and/or modify it
  under the terms of the GNU General Public License version 2
  as published by the Free Software Foundation.


  This software is provided AS-IS with no warranty, either express or
  implied. That is, this program is distributed in the hope that it will 
  be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  General Public License for more details

  You should have received a copy of the GNU General Public License along
  with this program; if not, write to the Free Software Foundation, Inc.,
  59 Temple Place, Suite 330, Boston, MA, 02111-1307.
  
  For more information about licensing, please refer to
  http://www.ghostscript.com/licensing/. For information on
  commercial licensing, go to http://www.artifex.com/licensing/ or
  contact Artifex Software, Inc., 101 Lucas Valley Road #110,
  San Rafael, CA  94903, U.S.A., +1(415)492-9861.
*/

/* $Id: gdevdcrd.c,v 1.5 2002/10/07 08:28:56 ghostgum Exp $ */
/* Create a sample device CRD */
#include "math_.h"
#include "memory_.h"
#include "string_.h"
#include "gx.h"
#include "gserrors.h"
#include "gsparam.h"
#include "gscspace.h"		/* for gscie.h */
#include "gscrd.h"
#include "gscrdp.h"
#include "gxdevcli.h"
#include "gdevdcrd.h"

/*
 * The parameters in this driver CRD are the default PostScript values,
 * except for the optional 'dented' procedures.
 */
#define DENT(v, f)\
  (v <= 0.5 ? v * f : (v - 0.5) * (1 - (0.5 * f)) / 0.5 + 0.5 * f)
private const gs_vector3 bit_WhitePoint = {(float)0.9505, 1, (float)1.0890};
private const gs_range3 bit_RangePQR = {
    {{0, (float)0.9505}, {0, 1}, {0, (float)1.0890}}
};
private const float dent_PQR = 1.0;
private int
bit_TransformPQR_proc(int index, floatp in, const gs_cie_wbsd * pwbsd,
		      gs_cie_render * pcrd, float *out)
{
    *out = DENT(in, dent_PQR);
    return 0;
}
private const gs_cie_transform_proc3 bit_TransformPQR = {
    bit_TransformPQR_proc, "bitTPQRDefault", {0, 0}, 0
};
private const float dent_LMN = 1.0;
private float
bit_EncodeLMN_proc(floatp in, const gs_cie_render * pcrd)
{
    return DENT(in, dent_LMN);
}
private const gs_cie_render_proc3 bit_EncodeLMN = { /* dummy */
    {bit_EncodeLMN_proc, bit_EncodeLMN_proc, bit_EncodeLMN_proc}
};
private const gs_range3 bit_RangeLMN = {
    {{0, (float)0.9505}, {0, 1}, {0, (float)1.0890}}
};
private const gs_matrix3 bit_MatrixABC = {
    {(float) 3.24063, (float)-0.96893, (float) 0.05571},
    {(float)-1.53721, (float) 1.87576, (float)-0.20402},
    {(float)-0.49863, (float) 0.04152, (float) 1.05700}
};
private float
bit_EncodeABC_proc(floatp in, const gs_cie_render * pcrd)
{
    return pow(max(in, 0.0), 0.45);
}
private const gs_cie_render_proc3 bit_EncodeABC = {
    {bit_EncodeABC_proc, bit_EncodeABC_proc, bit_EncodeABC_proc}
};
/* These RenderTables are no-ops. */
private const byte bit_rtt0[2*2*3] = {
    /*0,0,0*/ 0,0,0,
    /*0,0,1*/ 0,0,255,
    /*0,1,0*/ 0,255,0,
    /*0,1,1*/ 0,255,255
};
private const byte bit_rtt1[2*2*3] = {
    /*1,0,0*/ 255,0,0,
    /*1,0,1*/ 255,0,255,
    /*1,1,0*/ 255,255,0,
    /*1,1,1*/ 255,255,255
};
private const gs_const_string bit_rt_data[2] = {
    {bit_rtt0, 2*2*3}, {bit_rtt1, 2*2*3}
};
private frac
bit_rt_proc(byte in, const gs_cie_render *pcrd)
{
    return frac_1 * in / 255;
}
private const gs_cie_render_table_t bit_RenderTable = {	/* dummy */
    {3, {2, 2, 2}, 3, bit_rt_data},
    {{bit_rt_proc, bit_rt_proc, bit_rt_proc}}
};

/*
 * Implement get_params for a sample device CRD.  A useful convention,
 * for devices that can provide more than one CRD, is to have a settable
 * parameter CRDName, which gives the name of the CRD in use.  This sample
 * code provides a constant CRDName: making it settable is left as an
 * exercise to the reader.
 */
int
sample_device_crd_get_params(gx_device *pdev, gs_param_list *plist,
			     const char *crd_param_name)
{
    int ecode = 0;

    if (param_requested(plist, "CRDName") > 0) {
	gs_param_string cns;
	int code;

	cns.data = (const byte *)crd_param_name;
	cns.size = strlen(crd_param_name);
	cns.persistent = true;
	code = param_write_string(plist, "CRDName", &cns);
	if (code < 0)
	    ecode = code;
    }
    if (param_requested(plist, crd_param_name) > 0) {
	gs_cie_render *pcrd;
	int code = gs_cie_render1_build(&pcrd, pdev->memory,
					"sample_device_crd_get_params");
	if (code >= 0) {
	    gs_cie_transform_proc3 tpqr;

	    tpqr = bit_TransformPQR;
	    tpqr.driver_name = pdev->dname;
	    code = gs_cie_render1_initialize(pcrd, NULL,
			&bit_WhitePoint, NULL /*BlackPoint*/,
			NULL /*MatrixPQR*/, &bit_RangePQR, &tpqr,
			NULL /*MatrixLMN*/, &bit_EncodeLMN, &bit_RangeLMN,
			&bit_MatrixABC, &bit_EncodeABC, NULL /*RangeABC*/,
			&bit_RenderTable);
	    if (code >= 0) {
		code = param_write_cie_render1(plist, crd_param_name, pcrd,
					       pdev->memory);
	    }
	    rc_decrement(pcrd, "sample_device_crd_get_params"); /* release */
	}
	if (code < 0)
	    ecode = code;
    }
    if (param_requested(plist, bit_TransformPQR.proc_name) > 0) {
	/*
	 * We definitely do not recommend the following use of a static
	 * to hold the address: this is a shortcut.
	 */
	gs_cie_transform_proc my_proc = bit_TransformPQR_proc;
	byte *my_addr = gs_alloc_string(pdev->memory, sizeof(my_proc),
					"sd_crd_get_params(proc)");
	int code;

	if (my_addr == 0)
	    code = gs_note_error(gs_error_VMerror);
	else {
	    gs_param_string as;

	    memcpy(my_addr, &my_proc, sizeof(my_proc));
	    as.data = my_addr;
	    as.size = sizeof(my_proc);
	    as.persistent = true;
	    code = param_write_string(plist, bit_TransformPQR.proc_name, &as);
	}
	if (code < 0)
	    ecode = code;
    }
    return ecode;
}
