g_template.c 255 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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/* ---------------------- 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)
{
    t_template *t;
    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);
    }
    if (x2->t_n > x1->t_n)
        post("add elements...");
    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)
{
    int nfrom = tfrom->t_n, nto = tto->t_n, i;
    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;
    int nto = tto->t_n, nfrom = tfrom->t_n, i;
    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)
        {
            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);
        for (i = 0; i < nto; i++)
            post("... %d", conformaction[i]);
        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. */

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;
    t_symbol *sx = gensym("x");
    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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            /* I'm not _exactly_ sure about this. It's possible
               that the user could screw up a nested array construction
               and end up with scalars that aren't able to conform. On
               the other hand, this keeps us from crashing if a non-
               existent array template is typed into the box. */
            if (!template_cancreate(y))
            {
                return 0;
            }

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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;
    }
    outlet_new(&x->x_obj, 0);
    return (x);
}

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++;
    return (gtemplate_donew(canvas_makebindsym(sym), argc, argv));
}

    /* 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];
    int i;
    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, pix, 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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    int x_ndash;
    t_fielddesc *x_strokedasharray; /* array of lengths */
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    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;
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    int x_transform_n;
    t_fielddesc *x_transform;
    t_fielddesc x_width;
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    t_svg_attr x_vis;
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    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 */
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} t_svg;

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

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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;

1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
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++)
    {
1087
1088
        if (argv[i].a_type == A_SYMBOL &&
            is_svgpath_cmd(atom_getsymbol(argv+i)))
1089
1090
1091
1092
1093
            j++;
    }
    return j;
}

1094
void *svg_new(t_pd *parent, t_symbol *s, int argc, t_atom *argv)
1095
{
1096
1097
1098
1099
1100
1101
    t_svg *x = (t_svg *)pd_new(svg_class);
    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;
1102
    int flags = 0;
1103
1104
1105
    /* the following should be set in method space */
    /* flags |= NOMOUSE; */
    x->x_flags = flags;
1106
1107
1108
    int nxy, i;
    t_fielddesc *fd;
    if (argc < 0) argc = 0;
1109
    if (x->x_type == gensym("path"))
1110
1111
1112
1113
1114
1115
1116
    {
        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;
    }
1117
    else if (x->x_type == gensym("group"))
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
    {
        nxy = 0;
        x->x_nargs = 0;
        x->x_vec = 0;
    }
    else /* all other shapes */
    {
        nxy =  (argc + (argc & 1));
        x->x_nargs = nxy;
    }
    x->x_vec = (t_fielddesc *)t_getbytes(nxy * sizeof(t_fielddesc));
1129
    if (argc && x->x_type == gensym("path"))
1130
1131
    {
        if (argv->a_type != A_SYMBOL ||
1132
1133
            (atom_getsymbol(argv) != gensym("M") &&
             atom_getsymbol(argv) != gensym("m")))
1134
        {
1135
1136
            /* this should probably be the parent instead of "x" */
            pd_error(x->x_parent, "draw path: path data must start "
1137
                        "with a moveto command (M or m)");
1138
1139
1140
1141
1142
1143
1144
            return 0;
        }
    }

    int cmdn = -1; /* hack */
    for (i = 0, fd = x->x_vec; i < argc; i++, argv++)
    {
1145
        if (x->x_type == gensym("path") &&
1146
1147
1148
1149
1150
1151
1152
1153
1154
            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"); */
1155
            if (x->x_type == gensym("path"))
1156
1157
1158
1159
1160
1161
1162
1163
1164
            {
                (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;
            }
        }
    }
1165
1166
    if (argc & 1 && x->x_type != gensym("path"))
        fielddesc_setfloat_const(fd, 0);
1167
1168
1169
1170
1171
1172
1173
1174
1175
    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;
1176
1177
1178
1179
1180
1181
    x->x_x1 = 0;
    x->x_x2 = 0;
    x->x_y1 = 0;
    x->x_y2 = 0;

    x->x_ndash = 0;
1182
1183
    x->x_strokedasharray =
        (t_fielddesc *)t_getbytes(1 * sizeof(t_fielddesc));
1184
1185
1186
1187
1188
    x->x_transform_n = 0;
    x->x_transform = (t_fielddesc *)t_getbytes(1 * sizeof(t_fielddesc));
    return (x);
}

1189
t_pd *svg_header(t_pd *x)
1190
{
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
    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"))
1201
    {
1202
        return 1;
1203
    }
1204
1205
1206
    else
        return 0;
}
1207

1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
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1227
1228
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1231
1232
1233
1234
1235
1236
1237
1238
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1241
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1243
1244
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1247
1248
1249
1250
1251
1252
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1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
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)
{
    t_symbol *type = 0;
    if (argc && argv->a_type == A_SYMBOL &&
        symbol_isdrawtype(argv[0].a_w.w_symbol))
    {
        type = atom_getsymbolarg(0, argc--, argv++);
        /* sprite has its own widgetbehavior and, therefore, its own class */
        if (type == gensym("sprite") || type == gensym("image"))
            return (drawimage_new(type, argc, argv));
    }
    t_draw *x = (t_draw *)pd_new(draw_class);
    if (!type) 
    {
        pd_error(x, "draw: need an svg shape (rect, circle, path, etc.)");
    }
    /* create a proxy for drawing/svg attributes */
    if (!(x->x_attr = (t_pd *)svg_new((t_pd *)x, type, argc--, argv++)))
    {
        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);
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
}

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)
{
1287
    static char strokelinecap[15];
1288
1289
    if (a == 0) sprintf(strokelinecap, "butt");
    else if (a == 1) sprintf(strokelinecap, "round");
1290
    else if (a == 2) sprintf(strokelinecap, "projecting");
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
    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);
}

1305
1306
/* todo: i think svg_togui and this are unnecessarily
   duplicating some code... */
1307
1308
extern void scalar_select(t_gobj *z, t_glist *owner, int state);
extern void scalar_drawselectrect(t_scalar *x, t_glist *glist, int state);
1309
void svg_doupdate(t_svg *x, t_canvas *c, t_symbol *s)
1310
1311
1312
{
    t_gobj *g;
    t_template *template;
1313
    t_canvas *visible = c;
1314
1315
1316
    void *parent = x->x_parent;
    t_canvas *parentcanvas =
        canvas_templatecanvas_forgroup(svg_parentcanvas(x));
1317
1318
1319
1320
1321
    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... */
1322
    while(visible->gl_isgraph && visible->gl_owner)
1323
        visible = visible->gl_owner;
1324
1325
1326
    for (g = c->gl_list; g; g = g->g_next)
    {
        if (glist_isvisible(c) && g->g_pd == scalar_class &&
1327
            parentcanvas ==
1328
1329
1330
1331
1332
1333
1334
1335
            template_findcanvas(template = (template_findbyname(
                (((t_scalar *)g)->sc_template))))
           )
        {
            t_word *data = ((t_scalar *)g)->sc_vec;
            char str[MAXPDSTRING];
            if (s == gensym("fill"))
            {
1336
1337
1338
1339
1340
                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)
1341
                {
1342
1343
                    fill = gensym(rgb_to_hex(
                        (int)fielddesc_getfloat(fd,
1344
                            template, data, 1),
1345
                        (int)fielddesc_getfloat(fd+1,
1346
                            template, data, 1),
1347
1348
                        (int)fielddesc_getfloat(fd+2,
                            template, data, 1)));
1349
                }
1350
1351
1352
                else
                    fill = &s_;
                sprintf(str, "-fill %s", fill->s_name);
1353
1354
1355
            }
            else if (s == gensym("stroke"))
            {
1356
1357
1358
1359
1360
                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)
1361
                {
1362
1363
                    stroke = gensym(rgb_to_hex(
                        (int)fielddesc_getfloat(fd,
1364
                            template, data, 1),
1365
                        (int)fielddesc_getfloat(fd+1,
1366
                            template, data, 1),
1367
1368
                        (int)fielddesc_getfloat(fd+2,
                            template, data, 1)));
1369
                }
1370
1371
                else stroke = &s_;
                sprintf(str, "-stroke %s", stroke->s_name);
1372
1373
1374
            }
            else if (s == gensym("fill-opacity"))
                sprintf(str, "-fillopacity %g",
1375
1376
                    fielddesc_getcoord(&x->x_fillopacity.a_attr,
                        template, data, 1));
1377
1378
            else if (s == gensym("fill-rule"))
                sprintf(str, "-fillrule %s", (int)fielddesc_getcoord(
1379
                    &x->x_fillrule.a_attr, template, data, 1) ?
1380
1381
1382
                       "evenodd" : "nonzero");
            else if (s == gensym("stroke-linecap"))
                sprintf(str, "-strokelinecap %s", get_strokelinecap(
1383
                    (int)fielddesc_getcoord(&x->x_strokelinecap.a_attr,
1384
1385
1386
                        template, data, 1)));
            else if (s == gensym("stroke-linejoin"))
                sprintf(str, "-strokelinejoin %s", get_strokelinejoin(
1387
                    (int)fielddesc_getcoord(&x->x_strokelinejoin.a_attr,
1388
1389
1390
                        template, data, 1)));
            else if (s == gensym("stroke-miterlimit"))
                sprintf(str, "-strokemiterlimit %g", fielddesc_getcoord(
1391
                    &x->x_strokemiterlimit.a_attr, template, data, 1));
1392
1393
            else if (s == gensym("stroke-opacity"))
                sprintf(str, "-strokeopacity %g", fielddesc_getcoord(
1394
                    &x->x_strokeopacity.a_attr, template, data, 1));
1395
            else if (s == gensym("stroke-width"))
1396
            {
1397
                sprintf(str, "-strokewidth %g", fielddesc_getcoord(
1398
                    &x->x_strokewidth.a_attr, template, data, 1));
1399
1400
                redraw_bbox = 1;
            }
1401
1402
1403
1404
1405
1406
1407
            else if (s == gensym("r"))
            {
                sprintf(str, "-rx %g -ry %g",
                fielddesc_getcoord(x->x_vec+2, template, data, 1),
                fielddesc_getcoord(x->x_vec+2, template, data, 1));
                redraw_bbox = 1;
            }
1408
            else if (s == gensym("rx"))
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
            {
                if (x->x_type == gensym("rect"))
                    sprintf(str, "-rx %d", (int)fielddesc_getcoord(
                        &x->x_rx.a_attr, template, data, 1));
                else
                {
                    sprintf(str, "-rx %g", fielddesc_getcoord(
                        x->x_vec+2, template, data, 1));
                    redraw_bbox = 1;
                }
            }
1420
            else if (s == gensym("ry"))
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
            {
                if (x->x_type == gensym("rect"))
                    sprintf(str, "-ry %d", (int)fielddesc_getcoord(
                        &x->x_ry.a_attr, template, data, 1));
                else
                {
                     sprintf(str, "-ry %g", fielddesc_getcoord(
                         x->x_vec+3, template, data, 1));
                     redraw_bbox = 1;
                }
           }
1432
            else if (s == gensym("vis"))
1433
            {
1434
1435
                sprintf(str, "-state %s", (int)fielddesc_getcoord(
                    &x->x_vis.a_attr, template, data, 1) ? "normal" : "hidden");
1436
1437
                redraw_bbox = 1;
            }
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
            else if (s == gensym("stroke-dasharray"))
            {
                if (x->x_ndash)
                {
                    t_fielddesc *fd = x->x_strokedasharray;
                    int i;
                    char *cur = str, * const end = str + sizeof str;
                    cur += snprintf(cur, end-cur, "-strokedasharray {");
                    for (i = 0; i < x->x_ndash; i++)
                        if (cur < end)
                            cur += snprintf(cur, end-cur, " %g ",
                                fielddesc_getcoord(fd+i, template, data, 1));
                    cur += snprintf(cur, end-cur, "}\n");
                }
                else return;
            }
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
            else if (s == gensym("data"))
            {
                /* this needs to be abstracted out somehow... */
                sys_vgui(".x%lx.c coords .draw%lx.%lx {\\\n",
                    visible, 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;
                redraw_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("points"))
            {
                /* this needs to be abstracted out somehow... */
                sys_vgui(".x%lx.c coords .draw%lx.%lx \\\n",
                    visible, 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;
                redraw_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");
            }
            if (x->x_type == gensym("group") && s != gensym("data") &&
                s != gensym("points"))
1524
            {
1525
1526
                sys_vgui(".x%lx.c itemconfigure .dgroup%lx.%lx %s\n",
                   visible, parent, data, str);
1527
            }
1528
            else if (s != gensym("data") && s != gensym("points"))
1529
1530
            {
                sys_vgui(".x%lx.c itemconfigure .draw%lx.%lx %s\n",
1531
                   visible, parent, data, str);
1532
            }
1533
1534
1535
1536
            if (redraw_bbox)
            {
                /* uncache the scalar's bbox */
                ((t_scalar *)g)->sc_bboxcache = 0;
1537
                sys_vgui("pdtk_canvas_getscroll .x%lx.c\n", visible);
1538
1539
1540
1541
1542
                if (glist_isselected(c, &((t_scalar *)g)->sc_gobj))
                {
                    //scalar_select(g, c, 1);
                    scalar_drawselectrect((t_scalar *)g, c, 0);
                    scalar_drawselectrect((t_scalar *)g, c, 1);
1543
                    /* only get the scroll if we had to redraw the bbox */
1544
1545
                }
            }
1546
        }
1547
1548
        if (g->g_pd == canvas_class)
        {
1549
            svg_doupdate(x, (t_glist *)g, s);
1550
        }
1551
1552
1553
1554
    }
}

extern t_canvas *canvas_list;
1555
void svg_update(t_svg *x, t_symbol *s)
1556
1557
1558
{
    t_canvas *c;
    for (c = canvas_list; c; c = c->gl_next)
1559
1560
        svg_doupdate(x, c, s);
}
1561

1562
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1569
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);
    }
1570
1571
}

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1630
/* resize x_vec et all for path or shape coordinate data */
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)
{
    /* only process path data and polygon/polyline points */
    if (x->x_type != gensym("path") && s != gensym("points")) return;
    /* 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);
}

1631
void svg_fillopacity(t_svg *x, t_symbol *s, t_int argc, t_atom *argv)
1632
1633
1634
{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
1635
1636
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1638
        /* 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);
1639
1640
1641
    }
}

1642
1643
void svg_strokeopacity(t_svg *x, t_symbol *s,
    t_int argc, t_atom *argv)
1644
1645
1646
{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
1647
1648
1649
        fielddesc_setfloatarg(&x->x_strokeopacity.a_attr, argc, argv);
        x->x_strokeopacity.a_flag = 1;
        svg_update(x, s);
1650
1651
1652
    }
}

1653
1654
void svg_strokedasharray(t_svg *x, t_symbol *s,
    int argc, t_atom *argv)
1655
1656
{
    t_fielddesc *fd;
1657
1658
1659
1660
    x->x_strokedasharray =
        (t_fielddesc *)t_resizebytes(x->x_strokedasharray,
            x->x_ndash * sizeof(*x->x_strokedasharray),
            argc * sizeof(*x->x_strokedasharray));
1661
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1663
1664
    x->x_ndash = argc;
    fd = x->x_strokedasharray;
    while (argc)
        fielddesc_setfloatarg(fd++, argc--, argv++);
1665
    svg_update(x, s);
1666
1667
}

1668
void svg_fill(t_svg *x, t_symbol *s, t_int argc, t_atom *argv)
1669
{
1670
1671
1672
1673
1674
1675
1676
    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;
    }
1677
1678
1679
1680
1681
1682
1683
1684
1685
    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)
        {
1686
1687
1688
1689
1690
            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;
1691
1692
1693
1694
1695
1696
        }
        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++);
1697
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1699
            fielddesc_setsymbol_const(x->x_fill,
                gensym(rgb_to_hex(r, g, b)));
            x->x_filltype = 1;
1700
1701
1702
        }
        if (argc && (argv->a_type == A_FLOAT || argv->a_type == A_SYMBOL))
        {
1703
            svg_fillopacity(x, gensym("fill-opacity"), argc, argv);
1704
1705
        }
    }
1706
    svg_update(x, s);
1707
1708
}

1709
void svg_stroke(t_svg *x, t_symbol *s, t_int argc, t_atom *argv)
1710
{
1711
1712
1713
1714
    if (argc <= 0)
        x->x_stroketype = 0;
    else if (argc == 1 && argv->a_type == A_SYMBOL)
    {
1715
1716
        fielddesc_setsymbol_const(x->x_stroke,
            atom_getsymbolarg(0, argc, argv));
1717
1718
        x->x_stroketype = 1;
    }
1719
1720
1721
    else if (argc > 2)
    {
        int var = 0, i;
1722
	t_fielddesc *fd = x->x_stroke;
1723
1724
1725
1726
        for(i = 0; i < argc; i++)
            var = (argv[i].a_type == A_SYMBOL) ? 1 : var;
        if (var)
        {
1727
1728
1729
1730
            fielddesc_setfloatarg(fd, argc--, argv++);
            fielddesc_setfloatarg(fd+1, argc--, argv++);
            fielddesc_setfloatarg(fd+2, argc--, argv++);
            x->x_stroketype = 2;
1731
1732
1733
        }
        else
        {
1734
            /* if no variables, then precompute a_stroke so it doesn't
1735
1736
1737
1738
               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++);
1739
1740
1741
            fielddesc_setsymbol_const(x->x_stroke,
                gensym(rgb_to_hex(r, g, b)));
            x->x_stroketype = 1;
1742
1743
1744
        }
        if (argc && (argv->a_type == A_FLOAT || argv->a_type == A_SYMBOL))
        {
1745
            svg_strokeopacity(x, s, argc, argv);
1746
1747
1748
            return;
        }
    }
1749
    svg_update(x, s);
1750
1751
}

1752
1753
void svg_strokelinecap(t_svg *x, t_symbol *s,
    t_int argc, t_atom *argv)
1754
1755
1756
{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
1757
1758
1759
        fielddesc_setfloatarg(&x->x_strokelinecap.a_attr, argc, argv);
        x->x_strokelinecap.a_flag = 1;
        svg_update(x, s);
1760
1761
1762
    }
}

1763
1764
void svg_strokelinejoin(t_svg *x, t_symbol *s,
    t_int argc, t_atom *argv)
1765
1766
1767
{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
1768
1769
1770
        fielddesc_setfloatarg(&x->x_strokelinejoin.a_attr, argc, argv);
        x->x_strokelinejoin.a_flag = 1;
        svg_update(x, s);
1771
1772
1773
    }
}

1774
1775
void svg_strokemiterlimit(t_svg *x, t_symbol *s,
    t_int argc, t_atom *argv)
1776
1777
1778
{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
1779
1780
1781
        fielddesc_setfloatarg(&x->x_strokemiterlimit.a_attr, argc, argv);
        x->x_strokemiterlimit.a_flag = 1;
        svg_update(x, s);
1782
1783
1784
    }
}

1785
void svg_strokewidth(t_svg *x, t_symbol *s, t_int argc, t_atom *argv)
1786
1787
1788
{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
1789
1790
1791
        fielddesc_setfloatarg(&x->x_strokewidth.a_attr, argc, argv);
        x->x_strokewidth.a_flag = 1;
        svg_update(x, s);
1792
1793
1794
    }
}

1795
void svg_fillrule(t_svg *x, t_symbol *s, t_int argc, t_atom *argv)
1796
1797
1798
{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
1799
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1801
        fielddesc_setfloatarg(&x->x_fillrule.a_attr, argc, argv);
        x->x_fillrule.a_flag = 1;
        svg_update(x, s);
1802
1803
1804
    }
}

1805
void svg_r(t_svg *x, t_symbol *s, int argc, t_atom *argv)
1806
{
1807
    if (x->x_type != gensym("circle"))
1808
    {
1809
        pd_error(x, "draw: %s: no method for 'r'", x->x_type->s_name);
1810
1811
        return;
    }
1812
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1819
1820
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1826
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1833
1834
1835
1836
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1838
1839
    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
1840
    {
1841
        pd_error(x, "draw: %s: no method for 'rx'", x->x_type->s_name);
1842
1843
1844
1845
        return;
    }
}

1846
void svg_ry(t_svg *x, t_symbol *s, int argc, t_atom *argv)
1847
{
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
    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
1866
    {
1867
        pd_error(x, "draw: %s: no method for 'ry'", x->x_type->s_name);
1868
1869
        return;
    }
1870
1871
1872
1873
1874
1875
}

/* todo: ensure that rect has 4 coords pre-allocated! otherwise a crash */
void svg_rectpoints(t_svg *x, t_symbol *s, int argc, t_atom *argv)
{
    if (x->x_type == gensym("rect"))
1876
    {
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
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1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
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1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
        int i;
        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 (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"));
        }
    }
    else
    {
        pd_error(x, "draw: %s: no poopy for '%s'",
            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"))
    {
        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"));
        }
    }
    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);
1942
1943
1944
1945
        return;
    }
}

1946
static int minv(t_float a[][3], t_float b[][3])
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
{
    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. */
1968
static void mmult(t_float a[][3], t_float b[][3], t_float c[][3])
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
{
    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];
}

1985
static void mset(t_float mtx[][3], t_float m1, t_float m2, t_float m3,
1986
1987
1988
1989
1990
1991
1992
1993
    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... */
1994
static void mget(t_float mtx[][3], t_float *mp1, t_float *mp2, t_float *mp3,
1995
1996
1997
1998
1999
2000
    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];
}

2001
void svg_parsetransform(t_svg *x, t_template *template, t_word *data,
2002
2003
2004
2005
2006
2007
2008
2009
    t_float *mp1, t_float *mp2, t_float *mp3,
    t_float *mp4, t_float *mp5, t_float *mp6)
{
    /* parse the args */
    t_symbol *type;
    int i, j;
    t_float m[3][3];
    t_float m2[3][3];
2010
2011
    mset(m, 1, 0, 0, 1, 0, 0); /* init to the identity matrix... */
    mset(m2, 0, 0, 0, 0, 0, 0);
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
    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
        {
            pd_error(x, "draw: bad args to 'transform' method");
            return;
        }
        fd++;
        argc --;
        if (type == gensym("translate"))
        {
           t_float tx = fielddesc_getfloat(fd++, template, data, 0);
           argc--;
           t_float ty = fielddesc_getfloat(fd++, template, data, 0);
           argc--;
2033
2034
           mset(m2, 1, 0, 0, 1, tx, ty);
           mmult(m, m2, m);
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
        }
        else if (type == gensym("scale"))
        {
           t_float sx = fielddesc_getfloat(fd++, template, data, 0);
           argc--;
           t_float sy = sx;
           if (argc && fd->fd_type == A_FLOAT)
           {
               sy = fielddesc_getfloat(fd++, template, data, 0);
               argc--;
           }
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           mset(m2, sx, 0, 0, sy, 0, 0);
           mmult(m, m2, m);
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        }
        /* cx and cy are optional */
        /* this doesn't jibe with glist_xtopixels, ytopixels, etc. */
        else if (type == gensym("rotate"))
        {
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            /* we need to convert degrees to radians */
            t_float a = (fielddesc_getfloat(fd++, template, data, 0)) *
                3.14159 / 180;
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            argc--;
            t_float cx = 0, cy = 0;
            if (argc && fd->fd_type == A_FLOAT)
            {
                cx = fielddesc_getfloat(fd++, template, data, 0);
                argc--;
            }
            if (argc && fd->fd_type == A_FLOAT)
            {
                cy = fielddesc_getfloat(fd++, template, data, 0);
                argc--;
            }
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            mset(m2, cos(a), sin(a), sin(a) * -1, cos(a),
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                      sin(a) * cy + cx * -1 * cos(a) + cx,
                      sin(a) * cx * -1 + cos(a) * cy * -1 + cy);
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            mmult(m, m2, m);
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        }
        else if (type == gensym("skewx"))
        {
            t_float a = fielddesc_getfloat(fd++, template, data, 0);
            argc--;
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            mset(m2, 1, 0, tan(a), 1, 0, 0);
            mmult(m, m2, m);
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        }
        else if (type == gensym("skewy"))
        {
            t_float a = fielddesc_getfloat(fd++, template, data, 0);
            argc--;
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            mset(m2, 1, tan(a), 0, 1, 0, 0);
            mmult(m, m2, m);
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        }
        else if (type == gensym("matrix"))
        {
            t_float a, b, c, d, e, f;
            a = fielddesc_getfloat(fd++, template, data, 0); argc--;
            b = fielddesc_getfloat(fd++, template, data, 0); argc--;
            c = fielddesc_getfloat(fd++, template, data, 0); argc--;
            d = fielddesc_getfloat(fd++, template, data, 0); argc--;
            e = fielddesc_getfloat(fd++, template, data, 0); argc--;
            f = fielddesc_getfloat(fd++, template, data, 0); argc--;
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            mset(m2, a, b, c, d, e, f);
            mmult(m, m2, m);
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        }
    }
    t_float a1, a2, a3, a4, a5, a6;
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    mget(m, &a1, &a2, &a3, &a4, &a5, &a6);
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    *mp1 = a1;
    *mp2 = a2;
    *mp3 = a3;
    *mp4 = a4;
    *mp5 = a5;
    *mp6 = a6;
}

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static void svg_dogroupmtx(t_canvas *c, t_template *template, t_word *data,
    t_float mtx[][3])
{
    t_float mtx2[3][3];
    t_float m1, m2, m3, m4, m5, m6;
    t_canvas *parent_group = c->gl_owner;
    if (parent_group && parent_group->gl_svg)
        svg_dogroupmtx(parent_group, template, data, mtx);
    t_svg *svg = (t_svg *)c->gl_svg;
    if (svg->x_transform)
    {
        svg_parsetransform(svg, template, data, &m1, &m2, &m3, &m4, &m5, &m6);
        mset(mtx2, m1, m2, m3, m4, m5, m6);
    }
    else
    {
        mset(mtx2, 1, 0, 0, 1, 0, 0);
    }
    mmult(mtx, mtx2, mtx);
}

/* should this return an int to signal something? */
static void svg_groupmtx(t_svg *x, t_template *template, t_word *data,
    t_float mtx[][3])
{
    t_canvas *c = svg_parentcanvas(x);
    mset(mtx, 1, 0, 0, 1, 0, 0);
    /* if the t_svg isn't inside a group,
       then we're done.  Otherwise we do
       matrix multiplications from the
       outermost group down. */
    if (c->gl_owner && c->gl_svg)
        svg_dogroupmtx(c, template, data, mtx);
}

void svg_group_pathrect_cache(t_svg *x, int state)
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{
    t_gobj *y;
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    t_canvas *c = (t_canvas *)x->x_parent;
    for (y = c->gl_list; y; y = y->g_next)
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    {
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        if (pd_class(&y->g_pd) == canvas_class &&
            ((t_canvas *)y)->gl_svg)
        {
            svg_group_pathrect_cache((t_svg *)(((t_canvas *)y)->gl_svg), state);
        }
        /* todo: probably need to recurse down into subgroups */
        if (pd_class(&y->g_pd) == draw_class)
        {
            t_svg *a = (t_svg *)(((t_draw *)y)->x_attr);
	    if (a->x_pathrect_cache != -1)
                a->x_pathrect_cache = state;
        }
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    } 
}

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void svg_doupdatetransform(t_svg *x, t_canvas *c)
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{
    t_float mtx1[3][3];
    t_float mtx2[3][3];
    t_float mtx3[3][3];
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    mset(mtx1, 0, 0, 0, 0, 0, 0);
    mset(mtx2, 0, 0, 0, 0, 0, 0);
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    t_gobj *g;
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    t_template *template = NULL;
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