g_template.c 261 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 ------------------------- */

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t_class *gtemplate_class;
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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));
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                if (!elemtemplate)
                {
                    post("warning: template %s does not exist",
                        argv[2].a_w.w_symbol->s_name);
                }
                else if (template_check_array_fields(
                        canvas_makebindsym(templatename), elemtemplate) == 0)
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                {
                    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
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        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
#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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    (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;
1063
1064
    int x_ndash;
    t_fielddesc *x_strokedasharray; /* array of lengths */
1065
1066
1067
1068
1069
1070
1071
    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;
1072
1073
1074
    int x_transform_n;
    t_fielddesc *x_transform;
    t_fielddesc x_width;
1075
    t_svg_attr x_vis;
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
    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 */
1088
1089
1090
1091
1092
1093
} t_svg;

typedef struct _draw
{
    t_object x_obj;
    t_symbol *x_drawtype;
1094
    t_canvas *x_canvas;
1095
    t_pd *x_attr;
1096
1097
} t_draw;

1098
1099
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1102
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1104
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1110
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1112
1113
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;

1114
1115
1116
1117
1118
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1120
1121
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1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
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++)
    {
1135
1136
        if (argv[i].a_type == A_SYMBOL &&
            is_svgpath_cmd(atom_getsymbol(argv+i)))
1137
1138
1139
1140
1141
            j++;
    }
    return j;
}

1142
1143
1144
1145
1146
1147
1148
1149
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);
}

1150
void *svg_new(t_pd *parent, t_symbol *s, int argc, t_atom *argv)
1151
{
1152
1153
    t_fielddesc *fd;
    int nxy, i, flags = 0;
1154
    t_svg *x = (t_svg *)pd_new(svg_class);
1155
    x->x_flags = flags;
1156
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1158
1159
1160
1161
1162
1163
    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"))
1164
1165
1166
1167
1168
1169
1170
    {
        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;
    }
1171
    else if (x->x_type == gensym("group"))
1172
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1175
1176
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1179
    {
        nxy = 0;
        x->x_nargs = 0;
        x->x_vec = 0;
    }
    else /* all other shapes */
    {
        nxy =  (argc + (argc & 1));
1180
1181
        /* give basic shapes at least 4 points */
        if (x->x_type == gensym("rect") ||
1182
            x->x_type == gensym("line") ||
1183
            x->x_type == gensym("circle") ||
1184
            x->x_type == gensym("ellipse"))
1185
1186
        {
            nxy = 4;
1187
            if (argc > 4) argc = 4;
1188
        }
1189
1190
1191
1192
1193
1194
1195
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1197
        if (x->x_type == gensym("polygon") ||
            x->x_type == gensym("polyline"))
        {
            if (argc < 4)
            {
                argc = 4;
                nxy = 4;
            }
        }
1198
1199
1200
        x->x_nargs = nxy;
    }
    x->x_vec = (t_fielddesc *)t_getbytes(nxy * sizeof(t_fielddesc));
1201
    if (x->x_type == gensym("rect") ||
1202
        x->x_type == gensym("line") ||
1203
        x->x_type == gensym("circle") ||
1204
1205
1206
        x->x_type == gensym("ellipse") ||
        x->x_type == gensym("polygon") ||
        x->x_type == gensym("polyline"))
1207
1208
1209
1210
1211
    {
        /* set x_vec to all zeros in case the user didn't provide
           enough arguments */
        svg_initvec(x);
    }
1212
    if (argc && x->x_type == gensym("path"))
1213
1214
    {
        if (argv->a_type != A_SYMBOL ||
1215
1216
            (atom_getsymbol(argv) != gensym("M") &&
             atom_getsymbol(argv) != gensym("m")))
1217
        {
1218
1219
            /* this should probably be the parent instead of "x" */
            pd_error(x->x_parent, "draw path: path data must start "
1220
                        "with a moveto command (M or m)");
1221
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1223
1224
1225
1226
1227
            return 0;
        }
    }

    int cmdn = -1; /* hack */
    for (i = 0, fd = x->x_vec; i < argc; i++, argv++)
    {
1228
        if (x->x_type == gensym("path") &&
1229
1230
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1233
1234
1235
1236
1237
            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"); */
1238
            if (x->x_type == gensym("path"))
1239
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1241
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1247
            {
                (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;
            }
        }
    }
1248
1249
    if (argc & 1 && x->x_type != gensym("path"))
        fielddesc_setfloat_const(fd, 0);
1250
    x->x_filltype = 0;
1251
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    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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1264
    x->x_x1 = 0;
    x->x_x2 = 0;
    x->x_y1 = 0;
    x->x_y2 = 0;

    x->x_ndash = 0;
1265
    x->x_strokedasharray =
1266
        (t_fielddesc *)t_getbytes(x->x_ndash * sizeof(t_fielddesc));
1267
    x->x_transform_n = 0;
1268
1269
    x->x_transform = (t_fielddesc *)t_getbytes(x->x_transform_n *
        sizeof(t_fielddesc));
1270
1271
1272
    return (x);
}

1273
t_pd *svg_header(t_pd *x)
1274
{
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
    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"))
1285
    {
1286
        return 1;
1287
    }
1288
1289
1290
    else
        return 0;
}
1291

1292
1293
1294
1295
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)
{
1296
    t_symbol *type;
1297
1298
1299
1300
    if (argc && argv->a_type == A_SYMBOL &&
        symbol_isdrawtype(argv[0].a_w.w_symbol))
    {
        type = atom_getsymbolarg(0, argc--, argv++);
1301
1302
        /* sprite and image have their own widgetbehavior, so they
        have their own class and new function */
1303
1304
1305
        if (type == gensym("sprite") || type == gensym("image"))
            return (drawimage_new(type, argc, argv));
    }
1306
    else
1307
    {
1308
1309
        type = gensym("rect");
        post("warning: draw: no shape specified, defaulting to 'rect'");
1310
    }
1311
1312
1313

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

1314
    /* create a proxy for drawing/svg attributes */
1315
    if (!(x->x_attr = (t_pd *)svg_new((t_pd *)x, type, argc, argv)))
1316
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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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1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
}

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)
{
1375
    static char strokelinecap[15];
1376
1377
    if (a == 0) sprintf(strokelinecap, "butt");
    else if (a == 1) sprintf(strokelinecap, "round");
1378
    else if (a == 2) sprintf(strokelinecap, "projecting");
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
    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);
}

1393
1394
1395
1396
1397
1398
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);

1399
extern void scalar_drawselectrect(t_scalar *x, t_glist *glist, int state);
1400
1401
1402
1403
1404

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)
{
1405
1406
1407
1408
1409
1410
   /* 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 */ 
    int in_array = (sc->sc_vec != data);
    post("in_array is %d", in_array);
    char tag[MAXPDSTRING];
1411
1412
    if (x->x_type == gensym("group"))
    {
1413
1414
1415
        sprintf(tag, "%s%lx.%lx",
            (in_array ? ".scelem" : ".dgroup"),
            (long unsigned int)x->x_parent,
1416
1417
1418
1419
1420
1421
1422
1423
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1641
1642
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1645
1646
1647
1648
1649
            (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);
            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)
{
1650
    post("updateing vec...");
1651
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    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);
1693
void svg_doupdate(t_svg *x, t_canvas *c, t_symbol *s)
1694
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1696
{
    t_gobj *g;
    t_template *template;
1697
    t_canvas *visible = c;
1698
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1700
    void *parent = x->x_parent;
    t_canvas *parentcanvas =
        canvas_templatecanvas_forgroup(svg_parentcanvas(x));
1701
    t_template *parenttemplate = canvas_findtemplate(parentcanvas);
1702
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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... */
1707
    while(visible->gl_isgraph && visible->gl_owner)
1708
        visible = visible->gl_owner;
1709
1710
    for (g = c->gl_list; g; g = g->g_next)
    {
1711
        if (glist_isvisible(c) && g->g_pd == scalar_class)
1712
        {
1713
1714
            template = template_findbyname((((t_scalar *)g)->sc_template));
            /* still kinda hacky-- redrawbbox side-effect is weird */
1715
            t_word *data = ((t_scalar *)g)->sc_vec;
1716
1717
1718
1719
            if (parenttemplate == template)
            { 
                svg_sendupdate(x, visible, s, template,
                    data, &redraw_bbox, parent, (t_scalar *)g);
1720
            }
1721
            else
1722
            {
1723
                if (template_has_elemtemplate(template, parenttemplate))
1724
                {
1725
1726
1727
                    svg_updatevec(c, ((t_scalar *)g)->sc_vec, template,
                        parenttemplate, parent, s, x, (t_scalar *)g,
                        &redraw_bbox);
1728
                }
1729
            }
1730
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1733
            if (redraw_bbox)
            {
                /* uncache the scalar's bbox */
                ((t_scalar *)g)->sc_bboxcache = 0;
1734
                /* only get the scroll if we had to redraw the bbox */
1735
                canvas_getscroll(visible);
1736
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1741
                if (glist_isselected(c, &((t_scalar *)g)->sc_gobj))
                {
                    scalar_drawselectrect((t_scalar *)g, c, 0);
                    scalar_drawselectrect((t_scalar *)g, c, 1);
                }
            }
1742
        }
1743
1744
        if (g->g_pd == canvas_class)
        {
1745
            svg_doupdate(x, (t_glist *)g, s);
1746
        }
1747
1748
1749
    }
}

1750
void svg_update(t_svg *x, t_symbol *s)
1751
1752
1753
{
    t_canvas *c;
    for (c = canvas_list; c; c = c->gl_next)
1754
1755
        svg_doupdate(x, c, s);
}
1756

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1764
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);
    }
1765
1766
}

1767
/* resize x_vec et al for path or shape coordinate data */
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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)
{
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    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;
        }
    }
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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);
}

1843
void svg_fillopacity(t_svg *x, t_symbol *s, t_int argc, t_atom *argv)
1844
1845
1846
{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
1847
1848
1849
1850
        /* 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);
1851
1852
1853
    }
}

1854
1855
void svg_strokeopacity(t_svg *x, t_symbol *s,
    t_int argc, t_atom *argv)
1856
1857
1858
{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
1859
1860
1861
        fielddesc_setfloatarg(&x->x_strokeopacity.a_attr, argc, argv);
        x->x_strokeopacity.a_flag = 1;
        svg_update(x, s);
1862
1863
1864
    }
}

1865
1866
void svg_strokedasharray(t_svg *x, t_symbol *s,
    int argc, t_atom *argv)
1867
1868
{
    t_fielddesc *fd;
1869
1870
1871
1872
    x->x_strokedasharray =
        (t_fielddesc *)t_resizebytes(x->x_strokedasharray,
            x->x_ndash * sizeof(*x->x_strokedasharray),
            argc * sizeof(*x->x_strokedasharray));
1873
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1875
1876
    x->x_ndash = argc;
    fd = x->x_strokedasharray;
    while (argc)
        fielddesc_setfloatarg(fd++, argc--, argv++);
1877
    svg_update(x, s);
1878
1879
}

1880
void svg_fill(t_svg *x, t_symbol *s, t_int argc, t_atom *argv)
1881
{
1882
1883
1884
1885
1886
1887
1888
    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;
    }
1889
1890
1891
1892
1893
1894
1895
1896
1897
    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)
        {
1898
1899
1900
1901
1902
            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;
1903
1904
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1906
1907
1908
        }
        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++);
1909
1910
1911
            fielddesc_setsymbol_const(x->x_fill,
                gensym(rgb_to_hex(r, g, b)));
            x->x_filltype = 1;
1912
1913
1914
        }
        if (argc && (argv->a_type == A_FLOAT || argv->a_type == A_SYMBOL))
        {
1915
            svg_fillopacity(x, gensym("fill-opacity"), argc, argv);
1916
1917
        }
    }
1918
    svg_update(x, s);
1919
1920
}

1921
void svg_stroke(t_svg *x, t_symbol *s, t_int argc, t_atom *argv)
1922
{
1923
1924
1925
1926
    if (argc <= 0)
        x->x_stroketype = 0;
    else if (argc == 1 && argv->a_type == A_SYMBOL)
    {
1927
1928
        fielddesc_setsymbol_const(x->x_stroke,
            atom_getsymbolarg(0, argc, argv));
1929
1930
        x->x_stroketype = 1;
    }
1931
1932
1933
    else if (argc > 2)
    {
        int var = 0, i;
1934
        t_fielddesc *fd = x->x_stroke;
1935
1936
1937
1938
        for(i = 0; i < argc; i++)
            var = (argv[i].a_type == A_SYMBOL) ? 1 : var;
        if (var)
        {
1939
1940
1941
1942
            fielddesc_setfloatarg(fd, argc--, argv++);
            fielddesc_setfloatarg(fd+1, argc--, argv++);
            fielddesc_setfloatarg(fd+2, argc--, argv++);
            x->x_stroketype = 2;
1943
1944
1945
        }
        else
        {
1946
            /* if no variables, then precompute a_stroke so it doesn't
1947
1948
1949
1950
               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++);
1951
1952
1953
            fielddesc_setsymbol_const(x->x_stroke,
                gensym(rgb_to_hex(r, g, b)));
            x->x_stroketype = 1;
1954
1955
1956
        }
        if (argc && (argv->a_type == A_FLOAT || argv->a_type == A_SYMBOL))
        {
1957
            svg_strokeopacity(x, s, argc, argv);
1958
1959
1960
            return;
        }
    }
1961
    svg_update(x, s);
1962
1963
}

1964
1965
void svg_strokelinecap(t_svg *x, t_symbol *s,
    t_int argc, t_atom *argv)
1966
1967
1968
{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
1969
1970
1971
        fielddesc_setfloatarg(&x->x_strokelinecap.a_attr, argc, argv);
        x->x_strokelinecap.a_flag = 1;
        svg_update(x, s);
1972
1973
1974
    }
}

1975
1976
void svg_strokelinejoin(t_svg *x, t_symbol *s,
    t_int argc, t_atom *argv)
1977
1978
1979
{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
1980
1981
1982
        fielddesc_setfloatarg(&x->x_strokelinejoin.a_attr, argc, argv);
        x->x_strokelinejoin.a_flag = 1;
        svg_update(x, s);
1983
1984
1985
    }
}

1986
1987
void svg_strokemiterlimit(t_svg *x, t_symbol *s,
    t_int argc, t_atom *argv)
1988
1989
1990
{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
1991
1992
1993
        fielddesc_setfloatarg(&x->x_strokemiterlimit.a_attr, argc, argv);
        x->x_strokemiterlimit.a_flag = 1;
        svg_update(x, s);
1994
1995
1996
    }
}

1997
void svg_strokewidth(t_svg *x, t_symbol *s, t_int argc, t_atom *argv)
1998
1999
2000
{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
2001
2002
2003
        fielddesc_setfloatarg(&x->x_strokewidth.a_attr, argc, argv);
        x->x_strokewidth.a_flag = 1;
        svg_update(x, s);
2004
2005
2006
    }
}

2007
void svg_fillrule(t_svg *x, t_symbol *s, t_int argc, t_atom *argv)
2008
2009
2010
{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
2011
2012
2013
        fielddesc_setfloatarg(&x->x_fillrule.a_attr, argc, argv);
        x->x_fillrule.a_flag = 1;
        svg_update(x, s);
2014
2015
2016
    }
}

2017
void svg_r(t_svg *x, t_symbol *s, int argc, t_atom *argv)
2018
{
2019
    if (x->x_type != gensym("circle"))
2020
    {
2021
        pd_error(x, "draw: %s: no method for 'r'", x->x_type->s_name);
2022
2023
        return;
    }
2024
2025
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
    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
2052
    {
2053
        pd_error(x, "draw: %s: no method for 'rx'", x->x_type->s_name);
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        return;
    }
}

2058
void svg_ry(t_svg *x, t_symbol *s, int argc, t_atom *argv)
2059
{
2060
2061
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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
2078
    {
2079
        pd_error(x, "draw: %s: no method for 'ry'", x->x_type->s_name);
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        return;
    }
2082
2083
}

2084
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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"))
2092
    {
2093
        if (argc)
2094
        {
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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;
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2105
                /* don't allow negative height/width */
                if (type == A_FLOAT && i > 1 && argv[0].a_w.w_float < 0)
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                    fielddesc_setfloat_const(fd + i, 0);
                else
                    fielddesc_setfloatarg(fd + i, argc, argv);
                /* just piggyback on the "points" message */
                svg_update(x, gensym("points"));
            }
2112
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        }
    }
    else
    {
2116
        pd_error(x, "draw: %s: no  for '%s'",
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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"))
    {
2126
        if (argc)
2127
        {
2128
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2136
2137
            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"));
            }
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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);
2169
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        return;
    }
}

2173
static int minv(t_float a[][3], t_float b[][3])
2174
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2178
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2182
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{
    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. */
2195
static void mmult(t_float a[][3], t_float b[][3], t_float c[][3])
2196
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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];
}

2212
static void mset(t_float mtx[][3], t_float m1, t_float m2, t_float m3,
2213
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2215
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2220
    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... */