g_template.c 260 KB
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/* Copyright (c) 1997-1999 Miller Puckette.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution.  */

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
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#include <math.h>  /* for matrix transforms */
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#include "m_pd.h"
#include "s_stuff.h"    /* for sys_hostfontsize */
#include "g_canvas.h"

void array_redraw(t_array *a, t_glist *glist);
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void graph_graphrect(t_gobj *z, t_glist *glist,
    int *xp1, int *yp1, int *xp2, int *yp2);
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/*
This file contains text objects you would put in a canvas to define a
template.  Templates describe objects of type "array" (g_array.c) and
"scalar" (g_scalar.c).
*/

    /* the structure of a "struct" object (also the obsolete "gtemplate"
    you get when using the name "template" in a box.) */

struct _gtemplate
{
    t_object x_obj;
    t_template *x_template;
    t_canvas *x_owner;
    t_symbol *x_sym;
    struct _gtemplate *x_next;
    int x_argc;
    t_atom *x_argv;
};

/* ---------------- forward definitions ---------------- */

static void template_conformarray(t_template *tfrom, t_template *tto,
    int *conformaction, t_array *a);
static void template_conformglist(t_template *tfrom, t_template *tto,
    t_glist *glist,  int *conformaction);
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t_canvas *canvas_templatecanvas_forgroup(t_canvas *c);
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static int drawimage_getindex(void *z, t_template *template, t_word *data);
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/* ---------------------- storage ------------------------- */

static t_class *gtemplate_class;
static t_class *template_class;

/* there's a pre-defined "float" template.  LATER should we bind this
to a symbol such as "pd-float"??? */

    /* return true if two dataslot definitions match */
static int dataslot_matches(t_dataslot *ds1, t_dataslot *ds2,
    int nametoo)
{
    return ((!nametoo || ds1->ds_name == ds2->ds_name) &&
        ds1->ds_type == ds2->ds_type &&
            (ds1->ds_type != DT_ARRAY ||
                ds1->ds_arraytemplate == ds2->ds_arraytemplate));
}

/* -- templates, the active ingredient in gtemplates defined below. ------- */

t_template *template_new(t_symbol *templatesym, int argc, t_atom *argv)
{
    t_template *x = (t_template *)pd_new(template_class);
    x->t_n = 0;
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    x->t_transformable = 0;
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    x->t_vec = (t_dataslot *)t_getbytes(0);
    while (argc > 0)
    {
        int newtype, oldn, newn;
        t_symbol *newname, *newarraytemplate = &s_, *newtypesym;
        if (argc < 2 || argv[0].a_type != A_SYMBOL ||
            argv[1].a_type != A_SYMBOL)
                goto bad;
        newtypesym = argv[0].a_w.w_symbol;
        newname = argv[1].a_w.w_symbol;
        if (newtypesym == &s_float)
            newtype = DT_FLOAT;
        else if (newtypesym == &s_symbol)
            newtype = DT_SYMBOL;
        else if (newtypesym == &s_list)
            newtype = DT_LIST;
        else if (newtypesym == gensym("array"))
        {
            if (argc < 3 || argv[2].a_type != A_SYMBOL)
            {
                pd_error(x, "array lacks element template or name");
                goto bad;
            }
            newarraytemplate = canvas_makebindsym(argv[2].a_w.w_symbol);
            newtype = DT_ARRAY;
            argc--;
            argv++;
        }
        else
        {
            pd_error(x, "%s: no such type", newtypesym->s_name);
            goto bad;
        }
        newn = (oldn = x->t_n) + 1;
        x->t_vec = (t_dataslot *)t_resizebytes(x->t_vec,
            oldn * sizeof(*x->t_vec), newn * sizeof(*x->t_vec));
        x->t_n = newn;
        x->t_vec[oldn].ds_type = newtype;
        x->t_vec[oldn].ds_name = newname;
        x->t_vec[oldn].ds_arraytemplate = newarraytemplate;
    bad: 
        argc -= 2; argv += 2;
    }
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    if (*templatesym->s_name)
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    {
        x->t_sym = templatesym;
        pd_bind(&x->t_pdobj, x->t_sym);
    }
    else x->t_sym = templatesym;
    return (x);
}

int template_size(t_template *x)
{
    return (x->t_n * sizeof(t_word));
}

int template_find_field(t_template *x, t_symbol *name, int *p_onset,
    int *p_type, t_symbol **p_arraytype)
{
    int i, n;
    if (!x)
    {
        bug("template_find_field");
        return (0);
    }
    n = x->t_n;
    for (i = 0; i < n; i++)
        if (x->t_vec[i].ds_name == name)
    {
        *p_onset = i * sizeof(t_word);
        *p_type = x->t_vec[i].ds_type;
        *p_arraytype = x->t_vec[i].ds_arraytemplate;
        return (1);
    }
    return (0);
}

t_float template_getfloat(t_template *x, t_symbol *fieldname, t_word *wp,
    int loud)
{
    int onset, type;
    t_symbol *arraytype;
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    t_float val = 0;
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    if (template_find_field(x, fieldname, &onset, &type, &arraytype))
    {
        if (type == DT_FLOAT)
            val = *(t_float *)(((char *)wp) + onset);
        else if (loud) error("%s.%s: not a number",
            x->t_sym->s_name, fieldname->s_name);
    }
    else if (loud) error("%s.%s: no such field",
        x->t_sym->s_name, fieldname->s_name);
    return (val);
}

void template_setfloat(t_template *x, t_symbol *fieldname, t_word *wp, 
    t_float f, int loud)
{
    int onset, type;
    t_symbol *arraytype;
    if (template_find_field(x, fieldname, &onset, &type, &arraytype))
     {
        if (type == DT_FLOAT)
            *(t_float *)(((char *)wp) + onset) = f;
        else if (loud) error("%s.%s: not a number",
            x->t_sym->s_name, fieldname->s_name);
    }
    else if (loud) error("%s.%s: no such field",
        x->t_sym->s_name, fieldname->s_name);
}

t_symbol *template_getsymbol(t_template *x, t_symbol *fieldname, t_word *wp,
    int loud)
{
    int onset, type;
    t_symbol *arraytype;
    t_symbol *val = &s_;
    if (template_find_field(x, fieldname, &onset, &type, &arraytype))
    {
        if (type == DT_SYMBOL)
            val = *(t_symbol **)(((char *)wp) + onset);
        else if (loud) error("%s.%s: not a symbol",
            x->t_sym->s_name, fieldname->s_name);
    }
    else if (loud) error("%s.%s: no such field",
        x->t_sym->s_name, fieldname->s_name);
    return (val);
}

void template_setsymbol(t_template *x, t_symbol *fieldname, t_word *wp, 
    t_symbol *s, int loud)
{
    int onset, type;
    t_symbol *arraytype;
    if (template_find_field(x, fieldname, &onset, &type, &arraytype))
     {
        if (type == DT_SYMBOL)
            *(t_symbol **)(((char *)wp) + onset) = s;
        else if (loud) error("%s.%s: not a symbol",
            x->t_sym->s_name, fieldname->s_name);
    }
    else if (loud) error("%s.%s: no such field",
        x->t_sym->s_name, fieldname->s_name);
}

    /* stringent check to see if a "saved" template, x2, matches the current
        one (x1).  It's OK if x1 has additional scalar elements but not (yet)
        arrays or lists.  This is used for reading in "data files". */
int template_match(t_template *x1, t_template *x2)
{
    int i;
    if (x1->t_n < x2->t_n)
        return (0);
    for (i = x2->t_n; i < x1->t_n; i++)
    {
        if (x1->t_vec[i].ds_type == DT_ARRAY || 
            x1->t_vec[i].ds_type == DT_LIST)
                return (0);
    }
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    //if (x2->t_n > x1->t_n)
    //    post("add elements...");
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    for (i = 0; i < x2->t_n; i++)
        if (!dataslot_matches(&x1->t_vec[i], &x2->t_vec[i], 1))
            return (0);
    return (1);
}

/* --------------- CONFORMING TO CHANGES IN A TEMPLATE ------------ */

/* the following routines handle updating scalars to agree with changes
in their template.  The old template is assumed to be the "installed" one
so we can delete old items; but making new ones we have to avoid scalar_new
which would make an old one whereas we will want a new one (but whose array
elements might still be old ones.)
    LATER deal with graphics updates too... */

    /* conform the word vector of a scalar to the new template */    
static void template_conformwords(t_template *tfrom, t_template *tto,
    int *conformaction, t_word *wfrom, t_word *wto)
{
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    int nto = tto->t_n, i;
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    for (i = 0; i < nto; i++)
    {
        if (conformaction[i] >= 0)
        {
                /* we swap the two, in case it's an array or list, so that
                when "wfrom" is deleted the old one gets cleaned up. */
            t_word wwas = wto[i];
            wto[i] = wfrom[conformaction[i]];
            wfrom[conformaction[i]] = wwas;
        }
    }
}

    /* conform a scalar, recursively conforming sublists and arrays  */
static t_scalar *template_conformscalar(t_template *tfrom, t_template *tto,
    int *conformaction, t_glist *glist, t_scalar *scfrom)
{
    t_scalar *x;
    t_gpointer gp;
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    int i;
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    t_template *scalartemplate;
    /* post("conform scalar"); */
        /* possibly replace the scalar */
    if (scfrom->sc_template == tfrom->t_sym)
    {
            /* see scalar_new() for comment about the gpointer. */
        gpointer_init(&gp);
        x = (t_scalar *)getbytes(sizeof(t_scalar) +
            (tto->t_n - 1) * sizeof(*x->sc_vec));
        x->sc_gobj.g_pd = scalar_class;
        x->sc_template = tfrom->t_sym;
        gpointer_setglist(&gp, glist, x);
            /* Here we initialize to the new template, but array and list
            elements will still belong to old template. */
        word_init(x->sc_vec, tto, &gp);

        template_conformwords(tfrom, tto, conformaction,
            scfrom->sc_vec, x->sc_vec);
            
            /* replace the old one with the new one in the list */
        if (glist->gl_list == &scfrom->sc_gobj)
        {
            glist->gl_list = &x->sc_gobj;
            x->sc_gobj.g_next = scfrom->sc_gobj.g_next;
        }
        else
        {
            t_gobj *y, *y2;
            for (y = glist->gl_list; y2 = y->g_next; y = y2)
                if (y2 == &scfrom->sc_gobj)
            {
                x->sc_gobj.g_next = y2->g_next;
                y->g_next = &x->sc_gobj;
                goto nobug;
            }
            bug("template_conformscalar");
        nobug: ;
        }
            /* burn the old one */
        pd_free(&scfrom->sc_gobj.g_pd);
        scalartemplate = tto;
    }
    else
    {
        x = scfrom;
        scalartemplate = template_findbyname(x->sc_template);
    }
        /* convert all array elements and sublists */
    for (i = 0; i < scalartemplate->t_n; i++)
    {
        t_dataslot *ds = scalartemplate->t_vec + i;
        if (ds->ds_type == DT_LIST)
        {
            t_glist *gl2 = x->sc_vec[i].w_list;
            template_conformglist(tfrom, tto, gl2, conformaction);
        }
        else if (ds->ds_type == DT_ARRAY)
        {
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            t_symbol *arraytemplate = ds->ds_arraytemplate;
            if (arraytemplate == tfrom->t_sym ||
                arraytemplate == tto->t_sym)
            {
                return 0;
            }
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            template_conformarray(tfrom, tto, conformaction, 
                x->sc_vec[i].w_array);
        }
    }
    return (x);
}

    /* conform an array, recursively conforming sublists and arrays  */
static void template_conformarray(t_template *tfrom, t_template *tto,
    int *conformaction, t_array *a)
{
    int i, j;
    t_template *scalartemplate = 0;
    if (a->a_templatesym == tfrom->t_sym)
    {
        /* the array elements must all be conformed */
        int oldelemsize = sizeof(t_word) * tfrom->t_n,
            newelemsize = sizeof(t_word) * tto->t_n;
        char *newarray = getbytes(newelemsize * a->a_n);
        char *oldarray = a->a_vec;
        if (a->a_elemsize != oldelemsize)
            bug("template_conformarray");
        for (i = 0; i < a->a_n; i++)
        {
            t_word *wp = (t_word *)(newarray + newelemsize * i);
            word_init(wp, tto, &a->a_gp);
            template_conformwords(tfrom, tto, conformaction,
                (t_word *)(oldarray + oldelemsize * i), wp);
            word_free((t_word *)(oldarray + oldelemsize * i), tfrom);
        }
        scalartemplate = tto;
        a->a_vec = newarray;
        freebytes(oldarray, oldelemsize * a->a_n);
    }
    else scalartemplate = template_findbyname(a->a_templatesym);
        /* convert all arrays and sublist fields in each element of the array */
    for (i = 0; i < a->a_n; i++)
    {
        t_word *wp = (t_word *)(a->a_vec + sizeof(t_word) * a->a_n * i);
        for (j = 0; j < scalartemplate->t_n; j++)
        {
            t_dataslot *ds = scalartemplate->t_vec + j;
            if (ds->ds_type == DT_LIST)
            {
                t_glist *gl2 = wp[j].w_list;
                template_conformglist(tfrom, tto, gl2, conformaction);
            }
            else if (ds->ds_type == DT_ARRAY)
            {
                template_conformarray(tfrom, tto, conformaction, 
                    wp[j].w_array);
            }
        }
    }
}

    /* this routine searches for every scalar in the glist that belongs
    to the "from" template and makes it belong to the "to" template.  Descend
    glists recursively.
    We don't handle redrawing here; this is to be filled in LATER... */

t_array *garray_getarray(t_garray *x);

static void template_conformglist(t_template *tfrom, t_template *tto,
    t_glist *glist,  int *conformaction)
{
    t_gobj *g;
    /* post("conform glist %s", glist->gl_name->s_name); */
    for (g = glist->gl_list; g; g = g->g_next)
    {
        if (pd_class(&g->g_pd) == scalar_class)
            g = &template_conformscalar(tfrom, tto, conformaction,
                glist, (t_scalar *)g)->sc_gobj;
        else if (pd_class(&g->g_pd) == canvas_class)
            template_conformglist(tfrom, tto, (t_glist *)g, conformaction);
        else if (pd_class(&g->g_pd) == garray_class)
            template_conformarray(tfrom, tto, conformaction,
                garray_getarray((t_garray *)g));
    }
}

    /* globally conform all scalars from one template to another */ 
void template_conform(t_template *tfrom, t_template *tto)
{
    int nto = tto->t_n, nfrom = tfrom->t_n, i, j,
        *conformaction = (int *)getbytes(sizeof(int) * nto),
        *conformedfrom = (int *)getbytes(sizeof(int) * nfrom), doit = 0;
    for (i = 0; i < nto; i++)
        conformaction[i] = -1;
    for (i = 0; i < nfrom; i++)
        conformedfrom[i] = 0;
    for (i = 0; i < nto; i++)
    {
        t_dataslot *dataslot = &tto->t_vec[i];
        for (j = 0; j < nfrom; j++)
        {
            t_dataslot *dataslot2 = &tfrom->t_vec[j];
            if (dataslot_matches(dataslot, dataslot2, 1))
            {
                conformaction[i] = j;
                conformedfrom[j] = 1;
            }
        }
    }
    for (i = 0; i < nto; i++)
        if (conformaction[i] < 0)
    {
        t_dataslot *dataslot = &tto->t_vec[i];
        for (j = 0; j < nfrom; j++)
            if (!conformedfrom[j] &&
                dataslot_matches(dataslot, &tfrom->t_vec[j], 0))
        {
            conformaction[i] = j;
            conformedfrom[j] = 1;
        }
    }
    if (nto != nfrom)
        doit = 1;
    else for (i = 0; i < nto; i++)
        if (conformaction[i] != i)
            doit = 1;

    if (doit)
    {
        t_glist *gl;
        post("conforming template '%s' to new structure",
            tfrom->t_sym->s_name);
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        //for (i = 0; i < nto; i++)
        //    post("... %d", conformaction[i]);
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        for (gl = canvas_list; gl; gl = gl->gl_next)
            template_conformglist(tfrom, tto, gl, conformaction);
    }
    freebytes(conformaction, sizeof(int) * nto);
    freebytes(conformedfrom, sizeof(int) * nfrom);
}

t_template *template_findbyname(t_symbol *s)
{
    return ((t_template *)pd_findbyclass(s, template_class));
}

t_canvas *template_findcanvas(t_template *template)
{
    t_gtemplate *gt;
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    if (!template)
    {
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        bug("template_findcanvas");
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        return (0);
    }
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    if (!(gt = template->t_list))
        return (0);
    return (gt->x_owner);
    /* return ((t_canvas *)pd_findbyclass(template->t_sym, canvas_class)); */
}

void template_notify(t_template *template, t_symbol *s, int argc, t_atom *argv)
{
    if (template->t_list)
        outlet_anything(template->t_list->x_obj.ob_outlet, s, argc, argv);
}

    /* bash the first of (argv) with a pointer to a scalar, and send on
    to template as a notification message */
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void template_notifyforscalar(t_template *template, t_glist *owner,
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    t_scalar *sc, t_symbol *s, int argc, t_atom *argv)
{
    t_gpointer gp;
    gpointer_init(&gp);
    gpointer_setglist(&gp, owner, sc);
    SETPOINTER(argv, &gp);
    template_notify(template, s, argc, argv);
    gpointer_unset(&gp);
}

    /* call this when reading a patch from a file to declare what templates
    we'll need.  If there's already a template, check if it matches.
    If it doesn't it's still OK as long as there are no "struct" (gtemplate)
    objects hanging from it; we just conform everyone to the new template.
    If there are still struct objects belonging to the other template, we're
    in trouble.  LATER we'll figure out how to conform the new patch's objects
    to the pre-existing struct. */
static void *template_usetemplate(void *dummy, t_symbol *s,
    int argc, t_atom *argv)
{
    t_template *x;
    t_symbol *templatesym =
        canvas_makebindsym(atom_getsymbolarg(0, argc, argv));
    if (!argc)
        return (0);
    argc--; argv++;
            /* check if there's already a template by this name. */
    if ((x = (t_template *)pd_findbyclass(templatesym, template_class)))
    {
        t_template *y = template_new(&s_, argc, argv), *y2;
            /* If the new template is the same as the old one,
            there's nothing to do.  */
        if (!template_match(x, y))
        {
                /* Are there "struct" objects upholding this template? */
            if (x->t_list)
            {
                    /* don't know what to do here! */
                error("%s: template mismatch",
                    templatesym->s_name);
            }
            else
            {
                    /* conform everyone to the new template */
                template_conform(x, y);
                pd_free(&x->t_pdobj);
                y2 = template_new(templatesym, argc, argv);
                y2->t_list = 0;
            }
        }
        pd_free(&y->t_pdobj);
    }
        /* otherwise, just make one. */
    else template_new(templatesym, argc, argv);
    return (0);
}

    /* here we assume someone has already cleaned up all instances of this. */
void template_free(t_template *x)
{
    if (*x->t_sym->s_name)
        pd_unbind(&x->t_pdobj, x->t_sym);
    t_freebytes(x->t_vec, x->t_n * sizeof(*x->t_vec));
}

static void template_setup(void)
{
    template_class = class_new(gensym("template"), 0, (t_method)template_free,
        sizeof(t_template), CLASS_PD, 0);
    class_addmethod(pd_canvasmaker, (t_method)template_usetemplate,
        gensym("struct"), A_GIMME, 0);
        
}

/* ---------------- gtemplates.  One per canvas. ----------- */

/* "Struct": an object that searches for, and if necessary creates, 
a template (above).  Other objects in the canvas then can give drawing
instructions for the template.  The template doesn't go away when the
"struct" is deleted, so that you can replace it with
another one to add new fields, for example. */

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static void gtemplate_free(t_gtemplate *x);

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static void *gtemplate_donew(t_symbol *sym, int argc, t_atom *argv)
{
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    t_canvas *cur = canvas_getcurrent();
    t_gobj *gob = cur->gl_list;
    while (gob)
    {
        if (pd_class(&gob->g_pd) == gtemplate_class)
        {
            error("%s: only one struct allowed per canvas.", cur->gl_name->s_name);
            return(0);
        }
        gob = gob->g_next;
    }
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    t_gtemplate *x = (t_gtemplate *)pd_new(gtemplate_class);
    t_template *t = template_findbyname(sym);
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    int i;
    x->x_owner = canvas_getcurrent();
    x->x_next = 0;
    x->x_sym = sym;
    x->x_argc = argc;
    x->x_argv = (t_atom *)getbytes(argc * sizeof(t_atom));
    for (i = 0; i < argc; i++)
        x->x_argv[i] = argv[i];

        /* already have a template by this name? */
    if (t)
    {
        x->x_template = t;
            /* if it's already got a "struct" object we
            just tack this one to the end of the list and leave it
            there. */
        if (t->t_list)
        {
            t_gtemplate *x2, *x3;
            for (x2 = x->x_template->t_list; x3 = x2->x_next; x2 = x3)
                ;
            x2->x_next = x;
            post("template %s: warning: already exists.", sym->s_name);
        }
        else
        {
                /* if there's none, we just replace the template with
                our own and conform it. */
            t_template *y = template_new(&s_, argc, argv);
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            canvas_redrawallfortemplate(t, 2);
                /* Unless the new template is different from the old one,
                there's nothing to do.  */
            if (!template_match(t, y))
            {
                    /* conform everyone to the new template */
                template_conform(t, y);
                pd_free(&t->t_pdobj);
                t = template_new(sym, argc, argv);
            }
            pd_free(&y->t_pdobj);
            t->t_list = x;
            canvas_redrawallfortemplate(t, 1);
        }
    }
    else
    {
            /* otherwise make a new one and we're the only struct on it. */
        x->x_template = t = template_new(sym, argc, argv);
        t->t_list = x;
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   }
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    outlet_new(&x->x_obj, 0);
    return (x);
}

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int template_check_array_fields(t_symbol *structname, t_template *template);

/* probably duplicating some code from template_new here... */
int gtemplate_cancreate(t_symbol *templatename, int argc, t_atom *argv)
{
    while (argc > 1)
    {
        t_symbol *typesym = argv[0].a_w.w_symbol;
        if (typesym == &s_float || typesym == &s_symbol)
        {
            argc -= 2;
            argv += 2; 
        }
        else if (typesym == gensym("array"))
        {
            if (argc > 2 && argv[2].a_type == A_SYMBOL)
            {
                /* check for cancreation here */
                t_template *elemtemplate =
                    template_findbyname(canvas_makebindsym(argv[2].a_w.w_symbol));
                if (!elemtemplate ||
                    !template_check_array_fields(
                        canvas_makebindsym(templatename), elemtemplate))
                {
                    return 0;
                }
                argc -= 3;
                argv += 3;
            }
            else
            {
                argc -= 2;
                argv += 2;
            }
        }
        else
        {
            argc -= 2;
            argv += 2;
        }
    }
    return 1;
}

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static void *gtemplate_new(t_symbol *s, int argc, t_atom *argv)
{
    t_symbol *sym = atom_getsymbolarg(0, argc, argv);
    if (argc >= 1)
        argc--; argv++;
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    if (gtemplate_cancreate(sym, argc, argv))
    {
        return (gtemplate_donew(canvas_makebindsym(sym), argc, argv));
    }
    else
        return 0;
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}

    /* old version (0.34) -- delete 2003 or so */
static void *gtemplate_new_old(t_symbol *s, int argc, t_atom *argv)
{
    t_symbol *sym = canvas_makebindsym(canvas_getcurrent()->gl_name);
    static int warned;
    if (!warned)
    {
        post("warning -- 'template' (%s) is obsolete; replace with 'struct'",
            sym->s_name);
        warned = 1;
    }
    return (gtemplate_donew(sym, argc, argv));
}

t_template *gtemplate_get(t_gtemplate *x)
{
    return (x->x_template);
}

static void gtemplate_free(t_gtemplate *x)
{
        /* get off the template's list */
    t_template *t = x->x_template;
    t_gtemplate *y;
    if (x == t->t_list)
    {
        canvas_redrawallfortemplate(t, 2);
        if (x->x_next)
        {
                /* if we were first on the list, and there are others on
                the list, make a new template corresponding to the new
                first-on-list and replace the existing template with it. */
            t_template *z = template_new(&s_,
                x->x_next->x_argc, x->x_next->x_argv);
            template_conform(t, z);
            pd_free(&t->t_pdobj);
            pd_free(&z->t_pdobj);
            z = template_new(x->x_sym, x->x_next->x_argc, x->x_next->x_argv);
            z->t_list = x->x_next;
            for (y = z->t_list; y ; y = y->x_next)
                y->x_template = z;
        }
        else t->t_list = 0;
        canvas_redrawallfortemplate(t, 1);
    }
    else
    {
        t_gtemplate *x2, *x3;
        for (x2 = t->t_list; x3 = x2->x_next; x2 = x3)
        {
            if (x == x3)
            {
                x2->x_next = x3->x_next;
                break;
            }
        }
    }
    freebytes(x->x_argv, sizeof(t_atom) * x->x_argc);
}

static void gtemplate_setup(void)
{
    gtemplate_class = class_new(gensym("struct"),
        (t_newmethod)gtemplate_new, (t_method)gtemplate_free,
        sizeof(t_gtemplate), CLASS_NOINLET, A_GIMME, 0);
    class_addcreator((t_newmethod)gtemplate_new_old, gensym("template"),
        A_GIMME, 0);
}

/* ---------------  FIELD DESCRIPTORS ---------------------- */

/* a field descriptor can hold a constant or a variable; if a variable,
it's the name of a field in the template we belong to.  LATER, we might
want to cache the offset of the field so we don't have to search for it
every single time we draw the object.
*/

struct _fielddesc
{
    char fd_type;       /* LATER consider removing this? */
    char fd_var;
    union
    {
        t_float fd_float;       /* the field is a constant float */
        t_symbol *fd_symbol;    /* the field is a constant symbol */
        t_symbol *fd_varsym;    /* the field is variable and this is the name */
    } fd_un;
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    float fd_v1;        /* min and max values */
    float fd_v2;
    float fd_screen1;   /* min and max screen values */
    float fd_screen2;
    float fd_quantum;   /* quantization in value */ 
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};

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static void fielddesc_setfloat_const(t_fielddesc *fd, t_float f)
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{
    fd->fd_type = A_FLOAT;
    fd->fd_var = 0;
    fd->fd_un.fd_float = f;
    fd->fd_v1 = fd->fd_v2 = fd->fd_screen1 = fd->fd_screen2 =
        fd->fd_quantum = 0;
}

static void fielddesc_setsymbol_const(t_fielddesc *fd, t_symbol *s)
{
    fd->fd_type = A_SYMBOL;
    fd->fd_var = 0;
    fd->fd_un.fd_symbol = s;
    fd->fd_v1 = fd->fd_v2 = fd->fd_screen1 = fd->fd_screen2 =
        fd->fd_quantum = 0;
}

static void fielddesc_setfloat_var(t_fielddesc *fd, t_symbol *s)
{
    char *s1, *s2, *s3, strbuf[MAXPDSTRING];
    fd->fd_type = A_FLOAT;
    fd->fd_var = 1;
    if (!(s1 = strchr(s->s_name, '(')) || !(s2 = strchr(s->s_name, ')'))
        || (s1 > s2))
    {
        fd->fd_un.fd_varsym = s;
        fd->fd_v1 = fd->fd_v2 = fd->fd_screen1 = fd->fd_screen2 =
            fd->fd_quantum = 0;
    }
    else
    {
        int cpy = s1 - s->s_name, got;
        if (cpy > MAXPDSTRING-5)
            cpy = MAXPDSTRING-5;
        strncpy(strbuf, s->s_name, cpy);
        strbuf[cpy] = 0;
        fd->fd_un.fd_varsym = gensym(strbuf);
        got = sscanf(s1, "(%f:%f)(%f:%f)(%f)",
            &fd->fd_v1, &fd->fd_v2, &fd->fd_screen1, &fd->fd_screen2,
                &fd->fd_quantum);
        if (got < 2)
            goto fail;
        if (got == 3 || (got < 4 && strchr(s2, '(')))
            goto fail;
        if (got < 5 && (s3 = strchr(s2, '(')) && strchr(s3+1, '('))
            goto fail;
        if (got == 4)
            fd->fd_quantum = 0;
        else if (got == 2)
        {
            fd->fd_quantum = 0;
            fd->fd_screen1 = fd->fd_v1;
            fd->fd_screen2 = fd->fd_v2;
        }
        return;
    fail:
        post("parse error: %s", s->s_name);
        fd->fd_v1 = fd->fd_screen1 = fd->fd_v2 = fd->fd_screen2 =
            fd->fd_quantum = 0;
    }
}

#define CLOSED 1
#define BEZ 2
#define NOMOUSE 4
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#define BBOX 8          /* pair of coords for rectangles and ellipses */
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#define A_ARRAY 55      /* LATER decide whether to enshrine this in m_pd.h */

static void fielddesc_setfloatarg(t_fielddesc *fd, int argc, t_atom *argv)
{
        if (argc <= 0) fielddesc_setfloat_const(fd, 0);
        else if (argv->a_type == A_SYMBOL)
            fielddesc_setfloat_var(fd, argv->a_w.w_symbol);
        else fielddesc_setfloat_const(fd, argv->a_w.w_float);
}

static void fielddesc_setsymbolarg(t_fielddesc *fd, int argc, t_atom *argv)
{
        if (argc <= 0) fielddesc_setsymbol_const(fd, &s_);
        else if (argv->a_type == A_SYMBOL)
        {
            fd->fd_type = A_SYMBOL;
            fd->fd_var = 1;
            fd->fd_un.fd_varsym = argv->a_w.w_symbol;
            fd->fd_v1 = fd->fd_v2 = fd->fd_screen1 = fd->fd_screen2 =
                fd->fd_quantum = 0;
        }
        else fielddesc_setsymbol_const(fd, &s_);
}

static void fielddesc_setarrayarg(t_fielddesc *fd, int argc, t_atom *argv)
{
        if (argc <= 0) fielddesc_setfloat_const(fd, 0);
        else if (argv->a_type == A_SYMBOL)
        {
            fd->fd_type = A_ARRAY;
            fd->fd_var = 1;
            fd->fd_un.fd_varsym = argv->a_w.w_symbol;
        }
        else fielddesc_setfloat_const(fd, argv->a_w.w_float);
}

    /* getting and setting values via fielddescs -- note confusing names;
    the above are setting up the fielddesc itself. */
static t_float fielddesc_getfloat(t_fielddesc *f, t_template *template,
    t_word *wp, int loud)
{
    if (f->fd_type == A_FLOAT)
    {
        if (f->fd_var)
            return (template_getfloat(template, f->fd_un.fd_varsym, wp, loud));
        else return (f->fd_un.fd_float);
    }
    else
    {
        if (loud)
            error("symbolic data field used as number");
        return (0);
    }
}

    /* convert a variable's value to a screen coordinate via its fielddesc */
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t_float fielddesc_cvttocoord(t_fielddesc *f, t_float val)
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{
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    t_float coord, extreme, div;
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    if (f->fd_v2 == f->fd_v1)
        return (val);
    div = (f->fd_screen2 - f->fd_screen1)/(f->fd_v2 - f->fd_v1);
    coord = f->fd_screen1 + (val - f->fd_v1) * div;
    extreme = (f->fd_screen1 < f->fd_screen2 ?
        f->fd_screen1 : f->fd_screen2);
    if (coord < extreme)
        coord = extreme;
    extreme = (f->fd_screen1 > f->fd_screen2 ? 
        f->fd_screen1 : f->fd_screen2);
    if (coord > extreme)
        coord = extreme;
    return (coord);
}

    /* read a variable via fielddesc and convert to screen coordinate */
t_float fielddesc_getcoord(t_fielddesc *f, t_template *template,
    t_word *wp, int loud)
{
    if (f->fd_type == A_FLOAT)
    {
        if (f->fd_var)
        {
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            t_float val = template_getfloat(template,
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                f->fd_un.fd_varsym, wp, loud);
            return (fielddesc_cvttocoord(f, val));
        }
        else return (f->fd_un.fd_float);
    }
    else
    {
        if (loud)
            error("symbolic data field used as number");
        return (0);
    }
}

static t_symbol *fielddesc_getsymbol(t_fielddesc *f, t_template *template,
    t_word *wp, int loud)
{
    if (f->fd_type == A_SYMBOL)
    {
        if (f->fd_var)
            return(template_getsymbol(template, f->fd_un.fd_varsym, wp, loud));
        else return (f->fd_un.fd_symbol);
    }
    else
    {
        if (loud)
            error("numeric data field used as symbol");
        return (&s_);
    }
}

    /* convert from a screen coordinate to a variable value */
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t_float fielddesc_cvtfromcoord(t_fielddesc *f, t_float coord)
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{
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    t_float val;
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    if (f->fd_screen2 == f->fd_screen1)
        val = coord;
    else
    {
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        t_float div = (f->fd_v2 - f->fd_v1)/(f->fd_screen2 - f->fd_screen1);
        t_float extreme;
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        val = f->fd_v1 + (coord - f->fd_screen1) * div;
        if (f->fd_quantum != 0)
            val = ((int)((val/f->fd_quantum) + 0.5)) *  f->fd_quantum;
        extreme = (f->fd_v1 < f->fd_v2 ?
            f->fd_v1 : f->fd_v2);
        if (val < extreme) val = extreme;
        extreme = (f->fd_v1 > f->fd_v2 ?
            f->fd_v1 : f->fd_v2);
        if (val > extreme) val = extreme;
    }
    return (val);
 }

void fielddesc_setcoord(t_fielddesc *f, t_template *template,
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    t_word *wp, t_float coord, int loud)
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{
    if (f->fd_type == A_FLOAT && f->fd_var)
    {
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        t_float val = fielddesc_cvtfromcoord(f, coord);
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        template_setfloat(template,
                f->fd_un.fd_varsym, wp, val, loud);
    }
    else
    {
        if (loud)
            error("attempt to set constant or symbolic data field to a number");
    }
}

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/* ---------------- draw svg shapes and paths ---------------- */

/*
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draw objects belong to templates and describe how the data in the template
are to be drawn.  The coordinates of the draw (and other display features)
can be attached to fields in the template.
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todo: some better way than drawcurve has for defining click widgetbehaviors
    (just checking for field variables and moving joints is too simplistic)
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*/

t_class *draw_class;

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t_class *svg_class;

typedef struct _svg_attr
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{
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    int a_flag;
    t_fielddesc a_attr;
} t_svg_attr;

/* svg attributes */
typedef struct _svg
{
    t_pd x_pd;
    void *x_parent; /* parent object-- currently either [group] or [draw] */
    int x_flags;
    t_symbol *x_type;
    t_fielddesc x_fill[3];
    int x_filltype;
    t_svg_attr x_fillopacity;
    t_svg_attr x_fillrule;
    t_fielddesc x_stroke[3];
    int x_stroketype;
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1061
    int x_ndash;
    t_fielddesc *x_strokedasharray; /* array of lengths */
1062
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1064
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1068
    t_svg_attr x_strokelinecap;
    t_svg_attr x_strokelinejoin;
    t_svg_attr x_strokemiterlimit;
    t_svg_attr x_strokeopacity;
    t_svg_attr x_strokewidth;
    t_svg_attr x_rx; /* for rounded rectangles */
    t_svg_attr x_ry;
1069
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1071
    int x_transform_n;
    t_fielddesc *x_transform;
    t_fielddesc x_width;
1072
    t_svg_attr x_vis;
1073
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1080
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1084
    int x_pathrect_cache; /* 0 to recalc on next draw_getrect call
                             1 for cached
                            -1 to turn off caching */
    int x_x1; /* use these for caching path bbox */
    int x_y1;
    int x_x2;
    int x_y2;
    int x_nargs;
    t_fielddesc *x_vec;
    int *x_nargs_per_cmd;      /* points per each path command */
    int x_npathcmds;
    char *x_pathcmds; /* for path commands */
1085
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1087
1088
1089
1090
} t_svg;

typedef struct _draw
{
    t_object x_obj;
    t_symbol *x_drawtype;
1091
    t_canvas *x_canvas;
1092
    t_pd *x_attr;
1093
1094
} t_draw;

1095
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1110
typedef struct _drawimage
{
    t_object x_obj;
    t_fielddesc x_value; /* todo: rename to index */
    t_fielddesc x_xloc;
    t_fielddesc x_yloc;
    t_fielddesc x_vis;
    t_symbol *x_img;
    t_float x_w;
    t_float x_h;
    int x_flags;
    int x_deleteme;
    t_canvas *x_canvas;
    t_pd *x_attr;
} t_drawimage;

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1112
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1131
static int is_svgpath_cmd(t_symbol *s)
{
    /* 1 for absolute cmd, 2 for relative */
    if (s == gensym("M") || s == gensym("Z") || s == gensym("L") ||
        s == gensym("H") || s == gensym("V") || s == gensym("C") ||
        s == gensym("S") || s == gensym("Q") || s == gensym("T") ||
        s == gensym("A"))
        return 1;
    else if (s == gensym("m") || s == gensym("z") || s == gensym("l") ||
        s == gensym("h") || s == gensym("v") || s == gensym("c") ||
        s == gensym("s") || s == gensym("q") || s == gensym("t") ||
        s == gensym("a"))
        return 2;
    else return 0;
}

static int path_ncmds(int argc, t_atom *argv)
{
    int i, j = 0;
    for(i = 0; i < argc; i++)
    {
1132
1133
        if (argv[i].a_type == A_SYMBOL &&
            is_svgpath_cmd(atom_getsymbol(argv+i)))
1134
1135
1136
1137
1138
            j++;
    }
    return j;
}

1139
1140
1141
1142
1143
1144
1145
1146
void svg_initvec(t_svg *x)
{
    t_fielddesc *fd = x->x_vec;
    int i;
    for (i = 0; i < 4; i++)
        fielddesc_setfloat_const(fd+i, 0);
}

1147
void *svg_new(t_pd *parent, t_symbol *s, int argc, t_atom *argv)
1148
{
1149
1150
    t_fielddesc *fd;
    int nxy, i, flags = 0;
1151
    t_svg *x = (t_svg *)pd_new(svg_class);
1152
    x->x_flags = flags;
1153
1154
1155
1156
1157
1158
1159
1160
    x->x_type = s;
    x->x_parent = (void *)parent;
    fielddesc_setfloat_const(&x->x_vis.a_attr, 1);
    /* let it inherit visibility from parent group, if present */
    x->x_vis.a_flag = 0;
    /* the following should be set in method space */
    /* flags |= NOMOUSE; */
    if (x->x_type == gensym("path"))
1161
1162
1163
1164
1165
1166
1167
    {
        int ncmds = x->x_npathcmds = path_ncmds(argc, argv);
        x->x_pathcmds = (char *)t_getbytes(ncmds * sizeof(char));
        x->x_nargs_per_cmd = (int *)t_getbytes(ncmds * sizeof(int));
        for (i = 0; i < ncmds; i++) x->x_nargs_per_cmd[i] = 0;
        nxy = x->x_nargs = argc - ncmds;
    }
1168
    else if (x->x_type == gensym("group"))
1169
1170
1171
1172
1173
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1176
    {
        nxy = 0;
        x->x_nargs = 0;
        x->x_vec = 0;
    }
    else /* all other shapes */
    {
        nxy =  (argc + (argc & 1));
1177
1178
        /* give basic shapes at least 4 points */
        if (x->x_type == gensym("rect") ||
1179
            x->x_type == gensym("line") ||
1180
            x->x_type == gensym("circle") ||
1181
            x->x_type == gensym("ellipse"))
1182
1183
        {
            nxy = 4;
1184
            if (argc > 4) argc = 4;
1185
        }
1186
1187
1188
1189
1190
1191
1192
1193
1194
        if (x->x_type == gensym("polygon") ||
            x->x_type == gensym("polyline"))
        {
            if (argc < 4)
            {
                argc = 4;
                nxy = 4;
            }
        }
1195
1196
1197
        x->x_nargs = nxy;
    }
    x->x_vec = (t_fielddesc *)t_getbytes(nxy * sizeof(t_fielddesc));
1198
    if (x->x_type == gensym("rect") ||
1199
        x->x_type == gensym("line") ||
1200
        x->x_type == gensym("circle") ||
1201
1202
1203
        x->x_type == gensym("ellipse") ||
        x->x_type == gensym("polygon") ||
        x->x_type == gensym("polyline"))
1204
1205
1206
1207
1208
    {
        /* set x_vec to all zeros in case the user didn't provide
           enough arguments */
        svg_initvec(x);
    }
1209
    if (argc && x->x_type == gensym("path"))
1210
1211
    {
        if (argv->a_type != A_SYMBOL ||
1212
1213
            (atom_getsymbol(argv) != gensym("M") &&
             atom_getsymbol(argv) != gensym("m")))
1214
        {
1215
1216
            /* this should probably be the parent instead of "x" */
            pd_error(x->x_parent, "draw path: path data must start "
1217
                        "with a moveto command (M or m)");
1218
1219
1220
1221
1222
1223
1224
            return 0;
        }
    }

    int cmdn = -1; /* hack */
    for (i = 0, fd = x->x_vec; i < argc; i++, argv++)
    {
1225
        if (x->x_type == gensym("path") &&
1226
1227
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1229
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1231
1232
1233
1234
            argv->a_type == A_SYMBOL &&
            is_svgpath_cmd(atom_getsymbol(argv)))
        {
                x->x_pathcmds[++cmdn] = *(atom_getsymbol(argv)->s_name);
        }
        else
        {
            fielddesc_setfloatarg(fd++, 1, argv);
            /* post("got a coord"); */
1235
            if (x->x_type == gensym("path"))
1236
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1238
1239
1240
1241
1242
1243
1244
            {
                (x->x_nargs_per_cmd[cmdn])++;
                /* if we get a field variable, just
                   turn off the get_rect caching */
                if (argv->a_type == A_SYMBOL)
                    x->x_pathrect_cache = -1;
            }
        }
    }
1245
1246
    if (argc & 1 && x->x_type != gensym("path"))
        fielddesc_setfloat_const(fd, 0);
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    x->x_filltype = 42;
    x->x_fillopacity.a_flag = 0;
    x->x_fillrule.a_flag = 0;
    x->x_stroketype = 0;
    x->x_strokelinecap.a_flag = 0;
    x->x_strokelinejoin.a_flag = 0;
    x->x_strokemiterlimit.a_flag = 0;
    x->x_strokeopacity.a_flag = 0;
    x->x_strokewidth.a_flag = 0;
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    x->x_x1 = 0;
    x->x_x2 = 0;
    x->x_y1 = 0;
    x->x_y2 = 0;

    x->x_ndash = 0;
1262
    x->x_strokedasharray =
1263
        (t_fielddesc *)t_getbytes(x->x_ndash * sizeof(t_fielddesc));
1264
    x->x_transform_n = 0;
1265
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    x->x_transform = (t_fielddesc *)t_getbytes(x->x_transform_n *
        sizeof(t_fielddesc));
1267
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1269
    return (x);
}

1270
t_pd *svg_header(t_pd *x)
1271
{
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1281
    return (&(((t_svg *)x)->x_pd));
}

static int symbol_isdrawtype(t_symbol *s)
{
    if (s == gensym("circle")  || s == gensym("ellipse")  ||
        s == gensym("line")    || s == gensym("path")     ||
        s == gensym("polygon") || s == gensym("polyline") ||
        s == gensym("rect")    || s == gensym("image")    ||
        s == gensym("sprite"))
1282
    {
1283
        return 1;
1284
    }
1285
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1287
    else
        return 0;
}
1288

1289
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static void *drawimage_new(t_symbol *classsym, int argc, t_atom *argv);

static void *draw_new(t_symbol *classsym, t_int argc, t_atom *argv)
{
1293
    t_symbol *type;
1294
1295
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1297
    if (argc && argv->a_type == A_SYMBOL &&
        symbol_isdrawtype(argv[0].a_w.w_symbol))
    {
        type = atom_getsymbolarg(0, argc--, argv++);
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1299
        /* sprite and image have their own widgetbehavior, so they
        have their own class and new function */
1300
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1302
        if (type == gensym("sprite") || type == gensym("image"))
            return (drawimage_new(type, argc, argv));
    }
1303
    else
1304
    {
1305
1306
        type = gensym("rect");
        post("warning: draw: no shape specified, defaulting to 'rect'");
1307
    }
1308
1309
1310

    t_draw *x = (t_draw *)pd_new(draw_class);

1311
    /* create a proxy for drawing/svg attributes */
1312
    if (!(x->x_attr = (t_pd *)svg_new((t_pd *)x, type, argc, argv)))
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    {
        pd_error(x, "draw: path data must start with 'm' or 'M'");
        return (0);
    }
    /* now that we have our proxy, make an inlet for it.
       The inlet will belong to our draw object, but the
       svg_class will actually receive the messages
       to the inlet. */
    t_svg *sa = (t_svg *)x->x_attr;
    inlet_new(&x->x_obj, &sa->x_pd, 0, 0);
    /* x_canvas can stay here */
    x->x_canvas = canvas_getcurrent();
    return (x);
}

t_canvas *svg_parentcanvas(t_svg *x)
{
    /* this is probably a better interface... I am
       returning c sometimes because it works for my
       use case, but that doesn't seem like a sensible
       interface in general. */
    t_canvas *ret = 0;
    if (x->x_type == gensym("group"))
    {
        t_canvas *c = (t_canvas *)x->x_parent;
        if (c->gl_owner)
            ret = c->gl_owner;
        else
            ret = c;
    }
    else if (x->x_type == gensym("sprite") ||
             x->x_type == gensym("image"))
    {
        t_drawimage *d = (t_drawimage *)x->x_parent;
        ret = d->x_canvas;
    }
    else
    {
        t_draw *d = (t_draw *)x->x_parent;
        ret = d->x_canvas;
    }
    return (ret);
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1367
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1370
1371
}

static char *rgb_to_hex(int r, int g, int b)
{
    static char hexc[10];
    int r1 = r < 0 ? 0 : r;
    if (r1 > 255) r1 = 255;
    int g1 = g < 0 ? 0 : g;
    if (g1 > 255) g1 = 255;
    int b1 = b < 0 ? 0 : b;
    if (b1 > 255) b1 = 255;
    sprintf(hexc, "#%.6x", (r1 << 16) + (g1 << 8) + b1);
    return hexc;
}

char *get_strokelinecap(int a)
{
1372
    static char strokelinecap[15];
1373
1374
    if (a == 0) sprintf(strokelinecap, "butt");
    else if (a == 1) sprintf(strokelinecap, "round");
1375
    else if (a == 2) sprintf(strokelinecap, "projecting");
1376
1377
1378
1379
1380
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1382
1383
1384
1385
1386
1387
1388
1389
    else sprintf(strokelinecap, "butt");
    return (strokelinecap);
}

char *get_strokelinejoin(int a)
{
    static char strokelinejoin[8];
    if (a == 0) sprintf(strokelinejoin, "miter");
    else if (a == 1) sprintf(strokelinejoin, "round");
    else if (a == 2) sprintf(strokelinejoin, "bevel");
    else sprintf(strokelinejoin, "miter");
    return (strokelinejoin);
}

1390
1391
1392
1393
1394
1395
void svg_parsetransform(t_svg *x, t_template *template, t_word *data,
    t_float *mp1, t_float *mp2, t_float *mp3,
    t_float *mp4, t_float *mp5, t_float *mp6);

void svg_group_pathrect_cache(t_svg *x, int state);

1396
extern void scalar_drawselectrect(t_scalar *x, t_glist *glist, int state);
1397
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1693
1694

void svg_sendupdate(t_svg *x, t_canvas *c, t_symbol *s,
    t_template *template, t_word *data, int *predraw_bbox, void *parent,
    t_scalar *sc)
{
 /* todo-- I'm mixing "c" with glist_getcanvas(c) a little too freely...
    need to experiment with gop scalars to make sure I'm not breaking
    anything */ 
   char tag[MAXPDSTRING];
    if (x->x_type == gensym("group"))
    {
        template_findcanvas(template);
        sprintf(tag, ".dgroup%lx.%lx",
            (long unsigned int)template_findcanvas(template),
            (long unsigned int)data);
    }
    else
    {
        sprintf(tag, ".draw%lx.%lx",
            (long unsigned int)x->x_parent,
            (long unsigned int)data);
    }
    if (s == gensym("fill"))
    {
        t_symbol *fill;
        t_fielddesc *fd = x->x_fill;
        if (x->x_filltype == 1)
            fill = fielddesc_getsymbol(fd, template, data, 1);
        else if (x->x_filltype == 2)
        {
            fill = gensym(rgb_to_hex(
                (int)fielddesc_getfloat(fd, template, data, 1),
                (int)fielddesc_getfloat(fd+1, template, data, 1),
                (int)fielddesc_getfloat(fd+2, template, data, 1)));
        }
        else
            fill = &s_;
        sys_vgui(".x%lx.c itemconfigure %s -fill %s\n",
            glist_getcanvas(c), tag, fill->s_name);
    }
    else if (s == gensym("stroke"))
    {
        t_symbol *stroke;
        t_fielddesc *fd = x->x_stroke;
        if (x->x_stroketype == 1)
            stroke = fielddesc_getsymbol(fd, template, data, 1);
        else if (x->x_stroketype == 2)
        {
            stroke = gensym(rgb_to_hex(
                (int)fielddesc_getfloat(fd, template, data, 1),
                (int)fielddesc_getfloat(fd+1, template, data, 1),
                (int)fielddesc_getfloat(fd+2, template, data, 1)));
        }
        else stroke = &s_;
        sys_vgui(".x%lx.c itemconfigure %s -stroke %s\n",
            glist_getcanvas(c), tag, stroke->s_name);
    }
    else if (s == gensym("fill-opacity"))
        sys_vgui(".x%lx.c itemconfigure %s -fillopacity %g\n",
            glist_getcanvas(c), tag,
            fielddesc_getcoord(&x->x_fillopacity.a_attr, template, data, 1));
    else if (s == gensym("fill-rule"))
        sys_vgui(".x%lx.c itemconfigure %s -fillrule %s\n",
            glist_getcanvas(c), tag, (int)fielddesc_getcoord(
                &x->x_fillrule.a_attr, template, data, 1) ?
                    "evenodd" : "nonzero");
    else if (s == gensym("stroke-linecap"))
        sys_vgui(".x%lx.c itemconfigure %s -strokelinecap %s\n",
            glist_getcanvas(c), tag, get_strokelinecap(
                (int)fielddesc_getcoord(&x->x_strokelinecap.a_attr,
                    template, data, 1)));
    else if (s == gensym("stroke-linejoin"))
        sys_vgui(".x%lx.c itemconfigure %s -strokelinejoin %s\n",
            glist_getcanvas(c), tag, get_strokelinejoin(
                (int)fielddesc_getcoord(&x->x_strokelinejoin.a_attr,
                    template, data, 1)));
    else if (s == gensym("stroke-miterlimit"))
        sys_vgui(".x%lx.c itemconfigure %s -strokemiterlimit %g\n",
            glist_getcanvas(c), tag, fielddesc_getcoord(
                &x->x_strokemiterlimit.a_attr, template, data, 1));
    else if (s == gensym("stroke-opacity"))
        sys_vgui(".x%lx.c itemconfigure %s -strokeopacity %g\n",
            glist_getcanvas(c), tag, fielddesc_getcoord(
                &x->x_strokeopacity.a_attr, template, data, 1));
    else if (s == gensym("stroke-width"))
    {
        sys_vgui(".x%lx.c itemconfigure %s -strokewidth %g\n",
            glist_getcanvas(c), tag, fielddesc_getcoord(
                &x->x_strokewidth.a_attr, template, data, 1));
        *predraw_bbox = 1;
    }
    else if (s == gensym("r"))
    {
        sys_vgui(".x%lx.c itemconfigure %s -rx %g -ry %g\n",
        glist_getcanvas(c), tag,
        fielddesc_getcoord(x->x_vec+2, template, data, 1),
        fielddesc_getcoord(x->x_vec+2, template, data, 1));
        *predraw_bbox = 1;
    }
    else if (s == gensym("rx"))
    {
        if (x->x_type == gensym("rect"))
            sys_vgui(".x%lx.c itemconfigure %s -rx %d\n",
                glist_getcanvas(c), tag, (int)fielddesc_getcoord(
                    &x->x_rx.a_attr, template, data, 1));
        else
        {
            sys_vgui(".x%lx.c itemconfigure %s -rx %g\n",
                glist_getcanvas(c), tag, fielddesc_getcoord(
                x->x_vec+2, template, data, 1));
            *predraw_bbox = 1;
        }
    }
    else if (s == gensym("ry"))
    {
        if (x->x_type == gensym("rect"))
            sys_vgui(".x%lx.c itemconfigure %s -ry %d\n",
                glist_getcanvas(c), tag, (int)fielddesc_getcoord(
                &x->x_ry.a_attr, template, data, 1));
        else
        {
             sys_vgui(".x%lx.c itemconfigure %s -ry %g\n",
                 glist_getcanvas(c), tag, fielddesc_getcoord(
                 x->x_vec+3, template, data, 1));
             *predraw_bbox = 1;
        }
    }
    else if (s == gensym("transform"))
    {
        t_float m1, m2, m3, m4, m5, m6;
        /* we'll probably get a different bbox now, so we
           will calculate a new one the next time we call
           draw_getrect for this draw command. For groups
           we need to do it for all of the draw commands
           inside it.
        */
        if (x->x_type == gensym("group"))
            svg_group_pathrect_cache(x, 0);
        else if (x->x_pathrect_cache != -1)
        {
            x->x_pathrect_cache = 0;
        }
        svg_parsetransform(x, template, data, &m1, &m2, &m3, &m4, &m5, &m6);
        if (x->x_type == gensym("group"))
        {
            sys_vgui(".x%lx.c itemconfigure .dgroup%lx.%lx -matrix "
                "{ {%g %g} {%g %g} {%g %g} }\n",
                glist_getcanvas(c), x->x_parent, data,
                m1, m2, m3, m4, m5, m6);
        }
        else
            sys_vgui(".x%lx.c itemconfigure %s -matrix "
                    "{ {%g %g} {%g %g} {%g %g} }\n",
                    glist_getcanvas(c), tag,
                    m1, m2, m3, m4, m5, m6);
        *predraw_bbox = 1;

    }
    else if (s == gensym("vis"))
    {
        sys_vgui(".x%lx.c itemconfigure %s -state %s\n",
            glist_getcanvas(c), tag, (int)fielddesc_getcoord(
            &x->x_vis.a_attr, template, data, 1) ? "normal" : "hidden");
        *predraw_bbox = 1;
    }
    else if (s == gensym("stroke-dasharray"))
    {
        if (x->x_ndash)
        {
            t_fielddesc *fd = x->x_strokedasharray;
            int i;
            sys_vgui(".x%lx.c itemconfigure %s -strokedasharray {",
                glist_getcanvas(c), tag);
            for (i = 0; i < x->x_ndash; i++)
            {
                sys_vgui(" %g ", fielddesc_getcoord(fd+i, template, data, 1));
            }
            sys_gui("}\n");
        }
    }
    else if (s == gensym("data"))
    {
        sys_vgui(".x%lx.c coords .draw%lx.%lx {\\\n",
            glist_getcanvas(c), parent, data);
        /* let's turn off bbox caching so we can recalculate the bbox */
        if (x->x_pathrect_cache != -1)
           x->x_pathrect_cache = 0;
        *predraw_bbox = 1;
        int i;
        char *cmd;
        t_fielddesc *f;
        int totalpoints = 0; /* running tally */
        /* path parser: no error checking yet */
        for (i = 0, cmd = x->x_pathcmds; i < x->x_npathcmds; i++, cmd++)
        {
            int j;
            int cargs = x->x_nargs_per_cmd[i];
            f = (x->x_vec)+totalpoints;
            sys_vgui("%c\\\n", *(cmd));
            for (j = 0; j < x->x_nargs_per_cmd[i]; j++)
                sys_vgui("%g\\\n", fielddesc_getcoord(
                    f+j, template, data, 1));
            totalpoints += x->x_nargs_per_cmd[i];
        }
        sys_gui("}\n");
    }
    else if (s == gensym("index"))
    {
        sys_vgui("pdtk_drawimage_index .x%lx.c .x%lx .draw%lx.%lx %d\n",
            glist_getcanvas(c), parent, parent, data, drawimage_getindex(parent,
                template, data)); 
    }
    else if (s == gensym("points"))
    {
        sys_vgui(".x%lx.c coords .draw%lx.%lx \\\n",
            glist_getcanvas(c), parent, data);
        /* let's turn off bbox caching so we can recalculate the bbox */
        if (x->x_pathrect_cache != -1)
           x->x_pathrect_cache = 0;
        *predraw_bbox = 1;
        int i;
        t_fielddesc *f = x->x_vec;
        if (x->x_type == gensym("rect") ||
            x->x_type == gensym("ellipse"))
        {
            t_float xval, yval, w, h;
            xval = fielddesc_getcoord(f, template, data, 1);
            yval = fielddesc_getcoord(f+1, template, data, 1);
            if (x->x_type == gensym("rect"))
            {
                w = xval + (fielddesc_getcoord(f+2, template, data, 1));
                h = yval + (fielddesc_getcoord(f+3, template, data, 1));
                sys_vgui("%g %g %g %g\\\n", xval, yval, w, h);
            }
            else
            {
                sys_vgui("%g %g\\\n", xval, yval);
            }
        }
        else
        {
            int n = (x->x_type == gensym("circle")) ? 2 : x->x_nargs;
            for (i = 0; i < n; i++)
            {
                sys_vgui("%g\\\n", fielddesc_getcoord(
                    f+i, template, data, 1));
            }
        }
        sys_gui("\n");
    }
}

void svg_updatevec(t_canvas *c, t_word *data, t_template *template,
    t_template *target, void *parent, t_symbol *s, t_svg *x, t_scalar *sc,
    int *predraw_bbox)
{
    int i, j;
    for (i = 0; i < template->t_n; i++)
    {
        if (template->t_vec[i].ds_type == DT_ARRAY)
        {
            int arrayonset, type, elemsize;
            t_symbol *targetsym = target->t_sym, *elemtemplatesym;
            t_array *array;
            char *elem;
            if (!template_find_field(template, ((template->t_vec)+i)->ds_name,
                &arrayonset, &type, &elemtemplatesym))
            {
                error("draw: problem finding array...");
                return;
            }

            t_template *elemtemplate = template_findbyname(elemtemplatesym);
            t_canvas *elemtemplatecanvas = template_findcanvas(elemtemplate);
            /* this is a doozy... */
            array = *(t_array **)(((char *)data) + arrayonset);
            elem = (char *)array->a_vec;

            if (elemtemplatesym == targetsym)
            {
                elemsize = array->a_elemsize;
                for (j = 0; j < array->a_n; j++)
                {
                        int redraw_bbox = 0;
                        svg_sendupdate(x, glist_getcanvas(c), s,
                            elemtemplate, (t_word *)(elem + elemsize * j),
                            predraw_bbox, parent, sc);
                }
            }
            svg_updatevec(c, (t_word *)elem, elemtemplate, target, parent,
                s, x, sc, predraw_bbox);
        }
    }
}

/* todo: i think svg_togui and this are unnecessarily duplicating code... */
extern void scalar_select(t_gobj *z, t_glist *owner, int state);
t_template *canvas_findtemplate(t_canvas *c);
1695
void svg_doupdate(t_svg *x, t_canvas *c, t_symbol *s)
1696
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1698
{
    t_gobj *g;
    t_template *template;
1699
    t_canvas *visible = c;
1700
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1702
    void *parent = x->x_parent;
    t_canvas *parentcanvas =
        canvas_templatecanvas_forgroup(svg_parentcanvas(x));
1703
    t_template *parenttemplate = canvas_findtemplate(parentcanvas);
1704
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    int redraw_bbox = 0;
     /* "visible" is here because we could be drawn in a gop, in
       which case we must "climb" out to the parent canvas on
       which we are drawn. There's probably a function somewhere
       that abstracts this away... */
1709
    while(visible->gl_isgraph && visible->gl_owner)
1710
        visible = visible->gl_owner;
1711
1712
    for (g = c->gl_list; g; g = g->g_next)
    {
1713
        if (glist_isvisible(c) && g->g_pd == scalar_class)
1714
        {
1715
1716
            template = template_findbyname((((t_scalar *)g)->sc_template));
            /* still kinda hacky-- redrawbbox side-effect is weird */
1717
            t_word *data = ((t_scalar *)g)->sc_vec;
1718
1719
1720
1721
            if (parenttemplate == template)
            { 
                svg_sendupdate(x, visible, s, template,
                    data, &redraw_bbox, parent, (t_scalar *)g);
1722
            }
1723
            else
1724
            {
1725
                if (template_has_elemtemplate(template, parenttemplate))
1726
                {
1727
1728
1729
                    svg_updatevec(c, ((t_scalar *)g)->sc_vec, template,
                        parenttemplate, parent, s, x, (t_scalar *)g,
                        &redraw_bbox);
1730
                }
1731
            }
1732
1733
1734
1735
            if (redraw_bbox)
            {
                /* uncache the scalar's bbox */
                ((t_scalar *)g)->sc_bboxcache = 0;
1736
                /* only get the scroll if we had to redraw the bbox */
1737
                sys_vgui("pdtk_canvas_getscroll .x%lx.c\n", visible);
1738
1739
1740
1741
1742
1743
                if (glist_isselected(c, &((t_scalar *)g)->sc_gobj))
                {
                    scalar_drawselectrect((t_scalar *)g, c, 0);
                    scalar_drawselectrect((t_scalar *)g, c, 1);
                }
            }
1744
        }
1745
1746
        if (g->g_pd == canvas_class)
        {
1747
            svg_doupdate(x, (t_glist *)g, s);
1748
        }
1749
1750
1751
    }
}

1752
void svg_update(t_svg *x, t_symbol *s)
1753
1754
1755
{
    t_canvas *c;
    for (c = canvas_list; c; c = c->gl_next)
1756
1757
        svg_doupdate(x, c, s);
}
1758

1759
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1762
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1764
1765
1766
void svg_vis(t_svg *x, t_symbol *s, int argc, t_atom *argv)
{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
        fielddesc_setfloatarg(&x->x_vis.a_attr, argc, argv);
        x->x_vis.a_flag = 1;
        svg_update(x, s);
    }
1767
1768
}

1769
/* resize x_vec et al for path or shape coordinate data */
1770
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1794
void svg_resizecoords(t_svg *x, int argc, t_atom *argv)
{
//    if (x->x_type != gensym("path")) return;
    int oldn = x->x_npathcmds;
    /* for polyline and polygon, we don't want any path commands */
    x->x_npathcmds = (x->x_type == gensym("path")) ?
        path_ncmds(argc, argv) : 0;
    x->x_pathcmds = (char *)t_resizebytes(x->x_pathcmds,
        oldn * sizeof(char),
        x->x_npathcmds * sizeof(char));

    x->x_nargs_per_cmd = (int *)t_resizebytes(x->x_nargs_per_cmd,
        oldn * sizeof(*x->x_nargs_per_cmd),
        x->x_npathcmds * sizeof(*x->x_nargs_per_cmd));

    oldn = x->x_nargs;
    x->x_nargs = argc - x->x_npathcmds;

    x->x_vec = (t_fielddesc *)t_resizebytes(x->x_vec,
        oldn * sizeof(*x->x_vec),
        x->x_nargs * sizeof(*x->x_vec));
}

void svg_data(t_svg *x, t_symbol *s, int argc, t_atom *argv)
{
1795
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1801
1802
1803
1804
1805
1806
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1808
1809
1810
1811
1812
1813
    if (argc)
    {
        /* only paths and polys */
        if (x->x_type != gensym("path") && x->x_type != gensym("polyline") &&
            x->x_type != gensym("polygon"))
            return;
        /* "points" for polys... */
        if (s == gensym("data") && x->x_type != gensym("path"))
            return;
        /* and "data" for paths */
        if (x->x_type == gensym("path"))
        {
            if (s == gensym("points")) return;
            if (argv->a_type == A_SYMBOL &&
                !is_svgpath_cmd(atom_getsymbol(argv)) ||
                argv->a_type != A_SYMBOL)
                return;
        }
    }
1814
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    /* resize the path data fields to fit the incoming data */
    svg_resizecoords(x, argc, argv);
    /* todo: loop is copy/pasted from draw_new-- break it out */
    t_fielddesc *fd;
    int i, cmdn = -1; /* hack */
    for (i = 0, fd = x->x_vec; i < argc; i++, argv++)
    {
        if (x->x_type == gensym("path") &&
            argv->a_type == A_SYMBOL &&
            is_svgpath_cmd(atom_getsymbol(argv)))
        {
                x->x_pathcmds[++cmdn] = *(atom_getsymbol(argv)->s_name);
                x->x_nargs_per_cmd[cmdn] = 0;
        }
        else
        {
            fielddesc_setfloatarg(fd++, 1, argv);
            /* post("got a coord"); */
            if (x->x_type == gensym("path"))
            {
                (x->x_nargs_per_cmd[cmdn])++;
                /* if we get a field variable, just
                   turn off the get_rect caching */
                if (argv->a_type == A_SYMBOL)
                    x->x_pathrect_cache = -1;
            }
        }
    }
    svg_update(x, s);
}

1845
void svg_fillopacity(t_svg *x, t_symbol *s, t_int argc, t_atom *argv)
1846
1847
1848
{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
1849
1850
1851
1852
        /* the svg_attr stuff should probably be set with a function */
        fielddesc_setfloatarg(&x->x_fillopacity.a_attr, argc, argv);
        x->x_fillopacity.a_flag = 1;
        svg_update(x, s);
1853
1854
1855
    }
}

1856
1857
void svg_strokeopacity(t_svg *x, t_symbol *s,
    t_int argc, t_atom *argv)
1858
1859
1860
{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
1861
1862
1863
        fielddesc_setfloatarg(&x->x_strokeopacity.a_attr, argc, argv);
        x->x_strokeopacity.a_flag = 1;
        svg_update(x, s);
1864
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    }
}

1867
1868
void svg_strokedasharray(t_svg *x, t_symbol *s,
    int argc, t_atom *argv)
1869
1870
{
    t_fielddesc *fd;
1871
1872
1873
1874
    x->x_strokedasharray =
        (t_fielddesc *)t_resizebytes(x->x_strokedasharray,
            x->x_ndash * sizeof(*x->x_strokedasharray),
            argc * sizeof(*x->x_strokedasharray));
1875
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1877
1878
    x->x_ndash = argc;
    fd = x->x_strokedasharray;
    while (argc)
        fielddesc_setfloatarg(fd++, argc--, argv++);
1879
    svg_update(x, s);
1880
1881
}

1882
void svg_fill(t_svg *x, t_symbol *s, t_int argc, t_atom *argv)
1883
{
1884
1885
1886
1887
1888
1889
1890
    if (argc <= 0)
        x->x_filltype = 0;
    else if (argc == 1 && argv->a_type == A_SYMBOL)
    {
        fielddesc_setsymbol_const(x->x_fill, atom_getsymbolarg(0, argc, argv));
        x->x_filltype = 1;
    }
1891
1892
1893
1894
1895
1896
1897
1898
1899
    else if (argc > 2)
    {
        int i, var = 0;
        /* if there's a color variable field we have to recalculate
           it each redraw in draw_vis */
        for(i = 0; i < argc; i++)
            var = (argv[i].a_type == A_SYMBOL) ? 1 : var;
        if (var)
        {
1900
1901
1902
1903
1904
            t_fielddesc *fd = x->x_fill;
            fielddesc_setfloatarg(fd, argc--, argv++);
            fielddesc_setfloatarg(fd+1, argc--, argv++);
            fielddesc_setfloatarg(fd+2, argc--, argv++);
            x->x_filltype = 2;
1905
1906
1907
1908
1909
1910
        }
        else
        {
            int r = (int)atom_getfloatarg(0, argc--, argv++);
            int g = (int)atom_getfloatarg(0, argc--, argv++);
            int b = (int)atom_getfloatarg(0, argc--, argv++);
1911
1912
1913
            fielddesc_setsymbol_const(x->x_fill,
                gensym(rgb_to_hex(r, g, b)));
            x->x_filltype = 1;
1914
1915
1916
        }
        if (argc && (argv->a_type == A_FLOAT || argv->a_type == A_SYMBOL))
        {
1917
            svg_fillopacity(x, gensym("fill-opacity"), argc, argv);
1918
1919
        }
    }
1920
    svg_update(x, s);
1921
1922
}

1923
void svg_stroke(t_svg *x, t_symbol *s, t_int argc, t_atom *argv)
1924
{
1925
1926
1927
1928
    if (argc <= 0)
        x->x_stroketype = 0;
    else if (argc == 1 && argv->a_type == A_SYMBOL)
    {
1929
1930
        fielddesc_setsymbol_const(x->x_stroke,
            atom_getsymbolarg(0, argc, argv));
1931
1932
        x->x_stroketype = 1;
    }
1933
1934
1935
    else if (argc > 2)
    {
        int var = 0, i;
1936
        t_fielddesc *fd = x->x_stroke;
1937
1938
1939
1940
        for(i = 0; i < argc; i++)
            var = (argv[i].a_type == A_SYMBOL) ? 1 : var;
        if (var)
        {
1941
1942
1943
1944
            fielddesc_setfloatarg(fd, argc--, argv++);
            fielddesc_setfloatarg(fd+1, argc--, argv++);
            fielddesc_setfloatarg(fd+2, argc--, argv++);
            x->x_stroketype = 2;
1945
1946
1947
        }
        else
        {
1948
            /* if no variables, then precompute a_stroke so it doesn't
1949
1950
1951
1952
               have to happen every call to draw_vis */
            int r = (int)atom_getfloatarg(0, argc--, argv++);
            int g = (int)atom_getfloatarg(0, argc--, argv++);
            int b = (int)atom_getfloatarg(0, argc--, argv++);
1953
1954
1955
            fielddesc_setsymbol_const(x->x_stroke,
                gensym(rgb_to_hex(r, g, b)));
            x->x_stroketype = 1;
1956
1957
1958
        }
        if (argc && (argv->a_type == A_FLOAT || argv->a_type == A_SYMBOL))
        {
1959
            svg_strokeopacity(x, s, argc, argv);
1960
1961
1962
            return;
        }
    }
1963
    svg_update(x, s);
1964
1965
}

1966
1967
void svg_strokelinecap(t_svg *x, t_symbol *s,
    t_int argc, t_atom *argv)
1968
1969
1970
{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
1971
1972
1973
        fielddesc_setfloatarg(&x->x_strokelinecap.a_attr, argc, argv);
        x->x_strokelinecap.a_flag = 1;
        svg_update(x, s);
1974
1975
1976
    }
}

1977
1978
void svg_strokelinejoin(t_svg *x, t_symbol *s,
    t_int argc, t_atom *argv)
1979
1980
1981
{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
1982
1983
1984
        fielddesc_setfloatarg(&x->x_strokelinejoin.a_attr, argc, argv);
        x->x_strokelinejoin.a_flag = 1;
        svg_update(x, s);
1985
1986
1987
    }
}

1988
1989
void svg_strokemiterlimit(t_svg *x, t_symbol *s,
    t_int argc, t_atom *argv)
1990
1991
1992
{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
1993
1994
1995
        fielddesc_setfloatarg(&x->x_strokemiterlimit.a_attr, argc, argv);
        x->x_strokemiterlimit.a_flag = 1;
        svg_update(x, s);
1996
1997
1998
    }
}

1999
void svg_strokewidth(t_svg *x, t_symbol *s, t_int argc, t_atom *argv)
2000
2001
2002
{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
2003
2004
2005
        fielddesc_setfloatarg(&x->x_strokewidth.a_attr, argc, argv);
        x->x_strokewidth.a_flag = 1;
        svg_update(x, s);
2006
2007
2008
    }
}

2009
void svg_fillrule(t_svg *x, t_symbol *s, t_int argc, t_atom *argv)
2010
2011
2012
{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
2013
2014
2015
        fielddesc_setfloatarg(&x->x_fillrule.a_attr, argc, argv);
        x->x_fillrule.a_flag = 1;
        svg_update(x, s);
2016
2017
2018
    }
}

2019
void svg_r(t_svg *x, t_symbol *s, int argc, t_atom *argv)
2020
{
2021
    if (x->x_type != gensym("circle"))
2022
    {
2023
        pd_error(x, "draw: %s: no method for 'r'", x->x_type->s_name);
2024
2025
        return;
    }
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
        t_fielddesc *fd = x->x_vec;
        fielddesc_setfloatarg(fd+2, argc, argv);
        svg_update(x, s);
    }
}

void svg_rx(t_svg *x, t_symbol *s, int argc, t_atom *argv)
{
    t_symbol *type = x->x_type;
    if (type == gensym("rect") || type == gensym("ellipse"))
    {
        if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
        {
            if (type == gensym("rect"))
            {
                fielddesc_setfloatarg(&x->x_rx.a_attr, argc, argv);
                x->x_rx.a_flag = 1;
            }
            else
            {
                fielddesc_setfloatarg(x->x_vec+2, argc, argv);
            }
            svg_update(x, s);
        }
    }
    else
2054
    {
2055
        pd_error(x, "draw: %s: no method for 'rx'", x->x_type->s_name);
2056
2057
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2059
        return;
    }
}

2060
void svg_ry(t_svg *x, t_symbol *s, int argc, t_atom *argv)
2061
{
2062
2063
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    t_symbol *type = x->x_type;
    if (type == gensym("rect") || type == gensym("ellipse"))
    {
        if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
        {
            if (type == gensym("rect"))
            {
                fielddesc_setfloatarg(&x->x_ry.a_attr, argc, argv);
                x->x_rx.a_flag = 1;
            }
            else
            {
                fielddesc_setfloatarg(x->x_vec+3, argc, argv);
            }
            svg_update(x, s);
        }
    }
    else
2080
    {
2081
        pd_error(x, "draw: %s: no method for 'ry'", x->x_type->s_name);
2082
2083
        return;
    }
2084
2085
}

2086
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/* The svg spec actually says that the rect shouldn't be rendered if
   height or width = 0. Current behavior is to draw a straight line,
   and only fail to draw if both are 0. Also, svg spec says to handle
   negative values as an error-- most of Pd doesn't do that so instead
   I just bash to zero. */
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void svg_rectpoints(t_svg *x, t_symbol *s, int argc, t_atom *argv)
{
    if (x->x_type == gensym("rect"))
2094
    {
2095
        if (argc)
2096
        {
2097
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            int i;
            t_atomtype type = argv[0].a_type;
            if (s == gensym("x")) i = 0;
            else if (s == gensym("y")) i = 1;
            else if (s == gensym("width")) i = 2;
            else i = 3; /* height */
            if (type == A_FLOAT || type == A_SYMBOL)
            {
                t_fielddesc *fd = x->x_vec;
                if (type == A_FLOAT && argv[0].a_w.w_float < 0)
                    fielddesc_setfloat_const(fd + i, 0);
                else
                    fielddesc_setfloatarg(fd + i, argc, argv);
                /* just piggyback on the "points" message */
                svg_update(x, gensym("points"));
            }
2113
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2116
        }
    }
    else
    {
2117
        pd_error(x, "draw: %s: no  for '%s'",
2118
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            x->x_type->s_name, s->s_name);
        return;
    }
}

void svg_ellipsepoints(t_svg *x, t_symbol *s, int argc, t_atom *argv)
{
    if (x->x_type == gensym("circle") || x->x_type == gensym("ellipse"))
    {
2127
        if (argc)
2128
        {
2129
2130
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2132
2133
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2137
2138
            int i;
            if (s == gensym("cx")) i = 0;
            else i = 1;
            if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
            {
                t_fielddesc *fd = x->x_vec;
                fielddesc_setfloatarg(fd + i, argc, argv);
                /* just piggybacking on the "points" message */
                svg_update(x, gensym("points"));
            }
2139
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        }
    }
    else
    {
        pd_error(x, "draw: %s: no method for '%s'",
            x->x_type->s_name, s->s_name);
        return;
    }
}

void svg_linepoints(t_svg *x, t_symbol *s, int argc, t_atom *argv)
{
    int i = 0;
    if (x->x_type == gensym("line"))
    {
        if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
        {
            if (s == gensym("x1")) i = 0;
            else if (s == gensym("y1")) i = 1;
            else if (s == gensym("x2")) i = 2;
            else if (s == gensym("y2")) i = 3;
            t_fielddesc *fd = x->x_vec;
            fielddesc_setfloatarg(fd + i, argc, argv);
            /* just simulate the "points" method */
            svg_update(x, gensym("points"));
        }
    }
    else
    {
        pd_error(x, "draw: %s: no method for '%s'",
            x->x_type->s_name, s->s_name);
2170
2171
2172
2173
        return;
    }
}

2174
static int minv(t_float a[][3], t_float b[][3])
2175
2176
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2178
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2183
2184
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2193
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2195
{
    t_float tmp[3][3], determinant = 0;
    int i, j;
    for(i = 0; i < 3; i++)
        determinant = determinant +
            (a[0][i]*(a[1][(i+1)%3]*a[2][(i+2)%3] -
            a[1][(i+2)%3]*a[2][(i+1)%3]));
    if (!determinant) return 0;
    for(i = 0; i < 3; i++)
    {
      for(j=0;j<3;j++)
           tmp[j][i] = ((a[(i+1)%3][(j+1)%3] * a[(i+2)%3][(j+2)%3]) - (a[(i+1)%3][(j+2)%3]*a[(i+2)%3][(j+1)%3]))/ determinant;
    }
    for(i = 0; i < 3; i++)
        for (j = 0; j < 3; j++)
            b[i][j] = tmp[i][j];
    return 1;
}

/* multiply matrix a by b and put result in c. if desired, c
   can point to a or b. */
2196
static void mmult(t_float a[][3], t_float b[][3], t_float c[][3])
2197
2198
2199
2200
2201
2202
2203
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2205
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2209
2210
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{
    t_float tmp[3][3] = { {0, 0, 0}, {0, 0, 0}, {0, 0, 0} };
    int i, j, k;
    for(i = 0; i < 3; i++)
        for(j = 0; j < 3; j++)
        {
            t_float sum = 0;
            for(k = 0; k < 3; k++)
                sum = sum + a[i][k] * b[k][j];
            tmp[i][j] = sum;
        }
    for(i = 0; i < 3; i++)
        for(j = 0; j < 3; j++)
            c[i][j] = tmp[i][j];
}

2213
static void mset(t_float mtx[][3], t_float m1, t_float m2, t_float m3,
2214
2215
2216
2217
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2219
2220
2221
    t_float m4, t_float m5, t_float m6)
{
    mtx[0][0] = m1; mtx[1][0] = m2; mtx[0][1] = m3;
    mtx[1][1] = m4; mtx[0][2] = m5; mtx[1][2] = m6;
    mtx[2][0] = 0;  mtx[2][1] = 0;  mtx[2][2] = 1;
}

/* not sure if this is useful... */
2222
static void mget(t_float mtx[][3], t_float *mp1, t_float *mp2, t_float *mp3,
2223
2224
2225
2226
2227
2228
    t_float *mp4, t_float *mp5, t_float *mp6)
{
    *mp1 = mtx[0][0]; *mp2 = mtx[1][0]; *mp3 = mtx[0][1];
    *mp4 = mtx[1][1]; *mp5 = mtx[0][2]; *mp6 = mtx[1][2];
}

2229
void svg_parsetransform(t_svg *x, t_template *template, t_word *data,
2230
2231
2232
2233
2234
2235
2236
    t_float *mp1, t_float *mp2, t_float *mp3,
    t_float *mp4, t_float *mp5, t_float *mp6)
{
    /* parse the args */
    t_symbol *type;
    t_float m[3][3];
    t_float m2[3][3];
2237
2238
    mset(m, 1, 0, 0, 1, 0, 0); /* init to the identity matrix... */
    mset(m2, 0, 0, 0, 0, 0, 0);
2239
2240
2241
2242
2243
2244
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2246
2247
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2249
2250
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2252
2253
2254
2255
2256
2257
2258
2259
    int argc = x->x_transform_n;
    t_fielddesc *fd = x->x_transform;
    /* should probably change this to argc > 0 since a screwup
       could land us in negativeland */
    while (argc)
    {
        if (fd->fd_un.fd_varsym)
            type = fd->fd_un.fd_varsym;
        else
        {