/* Copyright (C) 2001-2006 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 that
   license.  Refer to licensing information at http://www.artifex.com/
   or contact Artifex Software, Inc.,  7 Mt. Lassen Drive - Suite A-134,
   San Rafael, CA  94903, U.S.A., +1(415)492-9861, for further information.
*/
/* $Id: gdevdcrd.c 8250 2007-09-25 13:31:24Z giles $ */
/* 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)
static const gs_vector3 bit_WhitePoint = {(float)0.9505, 1, (float)1.0890};
static const gs_range3 bit_RangePQR = {
    {{0, (float)0.9505}, {0, 1}, {0, (float)1.0890}}
};
static const float dent_PQR = 1.0;
static 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;
}
static const gs_cie_transform_proc3 bit_TransformPQR = {
    bit_TransformPQR_proc, "bitTPQRDefault", {0, 0}, 0
};
static const float dent_LMN = 1.0;
static float
bit_EncodeLMN_proc(floatp in, const gs_cie_render * pcrd)
{
    return DENT(in, dent_LMN);
}
static const gs_cie_render_proc3 bit_EncodeLMN = { /* dummy */
    {bit_EncodeLMN_proc, bit_EncodeLMN_proc, bit_EncodeLMN_proc}
};
static const gs_range3 bit_RangeLMN = {
    {{0, (float)0.9505}, {0, 1}, {0, (float)1.0890}}
};
static 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}
};
static float
bit_EncodeABC_proc(floatp in, const gs_cie_render * pcrd)
{
    return pow(max(in, 0.0), 0.45);
}
static const gs_cie_render_proc3 bit_EncodeABC = {
    {bit_EncodeABC_proc, bit_EncodeABC_proc, bit_EncodeABC_proc}
};
/* These RenderTables are no-ops. */
static 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
};
static 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
};
static const gs_const_string bit_rt_data[2] = {
    {bit_rtt0, 2*2*3}, {bit_rtt1, 2*2*3}
};
static frac
bit_rt_proc(byte in, const gs_cie_render *pcrd)
{
    return frac_1 * in / 255;
}
static 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(pdev->memory, 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;
}
