g_template.c 245 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 ---------------- */

/*
draws 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.

todo: some better way than drawcurve for defining click widgetbehaviors (just
      checking for field variables and moving joints is too simplistic)
*/

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;
//    int x_flags;            /* CLOSED and/or BEZ and/or NOMOUSE */
    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;

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

1094
/* this can probably be deleted now */
1095
1096
1097
1098
1099
1100
1101
t_draw *draw_getgroup(t_draw *x)
{
    t_gobj *g;
    t_draw *dgroup = 0;
    t_template *templ;
    t_symbol *s1 = gensym("draw");
    t_symbol *s2 = gensym("group");
1102
    
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
    for(g = x->x_canvas->gl_list; g; g = g->g_next)
    {
        t_object *ob = pd_checkobject(&g->g_pd);
        t_atom *argv;
        if (!ob || ob->te_type != T_OBJECT ||
            binbuf_getnatom(ob->te_binbuf) < 2)
            continue;
        argv = binbuf_getvec(ob->te_binbuf);
        if (argv[0].a_type != A_SYMBOL || argv[1].a_type != A_SYMBOL
            || argv[0].a_w.w_symbol != s1 || argv[1].a_w.w_symbol != s2)
            continue;
        dgroup = (t_draw *)g;
        break;
    }
    return (dgroup);
}

1120
void *svg_new(t_pd *parent, t_symbol *s, int argc, t_atom *argv)
1121
{
1122
1123
1124
1125
1126
1127
    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;
1128
    int flags = 0;
1129
1130
1131
    /* the following should be set in method space */
    /* flags |= NOMOUSE; */
    x->x_flags = flags;
1132
1133
1134
    int nxy, i;
    t_fielddesc *fd;
    if (argc < 0) argc = 0;
1135
    if (x->x_type == gensym("path"))
1136
1137
1138
1139
1140
1141
1142
    {
        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;
    }
1143
    else if (x->x_type == gensym("group"))
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
    {
        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));
1155
    if (argc && x->x_type == gensym("path"))
1156
1157
    {
        if (argv->a_type != A_SYMBOL ||
1158
1159
            (atom_getsymbol(argv) != gensym("M") &&
             atom_getsymbol(argv) != gensym("m")))
1160
        {
1161
1162
            /* this should probably be the parent instead of "x" */
            pd_error(x->x_parent, "draw path: path data must start "
1163
                        "with a moveto command (M or m)");
1164
1165
1166
1167
1168
1169
1170
            return 0;
        }
    }

    int cmdn = -1; /* hack */
    for (i = 0, fd = x->x_vec; i < argc; i++, argv++)
    {
1171
        if (x->x_type == gensym("path") &&
1172
1173
1174
1175
1176
1177
1178
1179
1180
            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"); */
1181
            if (x->x_type == gensym("path"))
1182
1183
1184
1185
1186
1187
1188
1189
1190
            {
                (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;
            }
        }
    }
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
    if (argc & 1 && x->x_type != gensym("path")) fielddesc_setfloat_const(fd, 0);
    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;
1201
1202
1203
1204
1205
1206
    x->x_x1 = 0;
    x->x_x2 = 0;
    x->x_y1 = 0;
    x->x_y2 = 0;

    x->x_ndash = 0;
1207
1208
    x->x_strokedasharray =
        (t_fielddesc *)t_getbytes(1 * sizeof(t_fielddesc));
1209
1210
1211
1212
1213
1214
1215
1216
1217
    x->x_transform_n = 0;
    x->x_transform = (t_fielddesc *)t_getbytes(1 * sizeof(t_fielddesc));

    char buf[50];
    sprintf(buf, ".x%lx", (long unsigned int)x);

    return (x);
}

1218
t_pd *svg_header(t_pd *x)
1219
{
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
    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"))
1230
    {
1231
        return 1;
1232
    }
1233
1234
1235
    else
        return 0;
}
1236

1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
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);
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
}

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)
{
1316
    static char strokelinecap[15];
1317
1318
    if (a == 0) sprintf(strokelinecap, "butt");
    else if (a == 1) sprintf(strokelinecap, "round");
1319
    else if (a == 2) sprintf(strokelinecap, "projecting");
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
    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);
}

1334
1335
1336
/* todo: i think svg_togui and this are unnecessarily
   duplicating some code... */
void svg_doupdate(t_svg *x, t_canvas *c, t_symbol *s)
1337
1338
1339
{
    t_gobj *g;
    t_template *template;
1340
    t_canvas *visible = c;
1341
1342
1343
    void *parent = x->x_parent;
    t_canvas *parentcanvas =
        canvas_templatecanvas_forgroup(svg_parentcanvas(x));
1344
1345
    while(visible->gl_isgraph && visible->gl_owner)
        visible = visible->gl_owner;
1346
    int isgroup = (x->x_type == gensym("group"));
1347
1348
1349
    for (g = c->gl_list; g; g = g->g_next)
    {
        if (glist_isvisible(c) && g->g_pd == scalar_class &&
1350
            parentcanvas ==
1351
1352
1353
1354
1355
1356
1357
1358
            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"))
            {
1359
1360
1361
1362
1363
                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)
1364
                {
1365
1366
                    fill = gensym(rgb_to_hex(
                        (int)fielddesc_getfloat(fd,
1367
                            template, data, 1),
1368
                        (int)fielddesc_getfloat(fd+1,
1369
                            template, data, 1),
1370
1371
                        (int)fielddesc_getfloat(fd+2,
                            template, data, 1)));
1372
                }
1373
1374
1375
                else
                    fill = &s_;
                sprintf(str, "-fill %s", fill->s_name);
1376
1377
1378
            }
            else if (s == gensym("stroke"))
            {
1379
1380
1381
1382
1383
                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)
1384
                {
1385
1386
                    stroke = gensym(rgb_to_hex(
                        (int)fielddesc_getfloat(fd,
1387
                            template, data, 1),
1388
                        (int)fielddesc_getfloat(fd+1,
1389
                            template, data, 1),
1390
1391
                        (int)fielddesc_getfloat(fd+2,
                            template, data, 1)));
1392
                }
1393
1394
                else stroke = &s_;
                sprintf(str, "-stroke %s", stroke->s_name);
1395
1396
1397
            }
            else if (s == gensym("fill-opacity"))
                sprintf(str, "-fillopacity %g",
1398
1399
                    fielddesc_getcoord(&x->x_fillopacity.a_attr,
                        template, data, 1));
1400
1401
            else if (s == gensym("fill-rule"))
                sprintf(str, "-fillrule %s", (int)fielddesc_getcoord(
1402
                    &x->x_fillrule.a_attr, template, data, 1) ?
1403
1404
1405
                       "evenodd" : "nonzero");
            else if (s == gensym("stroke-linecap"))
                sprintf(str, "-strokelinecap %s", get_strokelinecap(
1406
                    (int)fielddesc_getcoord(&x->x_strokelinecap.a_attr,
1407
1408
1409
                        template, data, 1)));
            else if (s == gensym("stroke-linejoin"))
                sprintf(str, "-strokelinejoin %s", get_strokelinejoin(
1410
                    (int)fielddesc_getcoord(&x->x_strokelinejoin.a_attr,
1411
1412
1413
                        template, data, 1)));
            else if (s == gensym("stroke-miterlimit"))
                sprintf(str, "-strokemiterlimit %g", fielddesc_getcoord(
1414
                    &x->x_strokemiterlimit.a_attr, template, data, 1));
1415
1416
            else if (s == gensym("stroke-opacity"))
                sprintf(str, "-strokeopacity %g", fielddesc_getcoord(
1417
                    &x->x_strokeopacity.a_attr, template, data, 1));
1418
1419
            else if (s == gensym("stroke-width"))
                sprintf(str, "-strokewidth %g", fielddesc_getcoord(
1420
                    &x->x_strokewidth.a_attr, template, data, 1));
1421
1422
            else if (s == gensym("rx"))
                sprintf(str, "-rx %g", fielddesc_getcoord(
1423
                    &x->x_rx.a_attr, template, data, 1));
1424
1425
            else if (s == gensym("ry"))
                sprintf(str, "-ry %g", fielddesc_getcoord(
1426
1427
1428
1429
                    &x->x_ry.a_attr, template, data, 1));
            else if (s == gensym("vis"))
                sprintf(str, "-state %s", (int)fielddesc_getcoord(
                    &x->x_vis.a_attr, template, data, 1) ? "normal" : "hidden");
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
            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;
            }
1446
            if (x->x_type == gensym("group"))
1447
            {
1448
1449
                sys_vgui(".x%lx.c itemconfigure .dgroup%lx.%lx %s\n",
                   visible, parent, data, str);
1450
1451
1452
1453
            }
            else
            {
                sys_vgui(".x%lx.c itemconfigure .draw%lx.%lx %s\n",
1454
                   visible, parent, data, str);
1455
            }
1456
            sys_vgui("pdtk_canvas_getscroll .x%lx.c\n", visible);
1457
        }
1458
1459
        if (g->g_pd == canvas_class)
        {
1460
            svg_doupdate(x, (t_glist *)g, s);
1461
        }
1462
1463
1464
1465
    }
}

extern t_canvas *canvas_list;
1466
void svg_update(t_svg *x, t_symbol *s)
1467
1468
1469
{
    t_canvas *c;
    for (c = canvas_list; c; c = c->gl_next)
1470
1471
        svg_doupdate(x, c, s);
}
1472

1473
1474
1475
1476
1477
1478
1479
1480
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);
    }
1481
1482
}

1483
void svg_fillopacity(t_svg *x, t_symbol *s, t_int argc, t_atom *argv)
1484
1485
1486
{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
1487
1488
1489
1490
        /* 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);
1491
1492
1493
    }
}

1494
1495
void svg_strokeopacity(t_svg *x, t_symbol *s,
    t_int argc, t_atom *argv)
1496
1497
1498
{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
1499
1500
1501
        fielddesc_setfloatarg(&x->x_strokeopacity.a_attr, argc, argv);
        x->x_strokeopacity.a_flag = 1;
        svg_update(x, s);
1502
1503
1504
    }
}

1505
1506
void svg_strokedasharray(t_svg *x, t_symbol *s,
    int argc, t_atom *argv)
1507
1508
{
    t_fielddesc *fd;
1509
1510
1511
1512
    x->x_strokedasharray =
        (t_fielddesc *)t_resizebytes(x->x_strokedasharray,
            x->x_ndash * sizeof(*x->x_strokedasharray),
            argc * sizeof(*x->x_strokedasharray));
1513
1514
1515
1516
    x->x_ndash = argc;
    fd = x->x_strokedasharray;
    while (argc)
        fielddesc_setfloatarg(fd++, argc--, argv++);
1517
    svg_update(x, s);
1518
1519
}

1520
void svg_fill(t_svg *x, t_symbol *s, t_int argc, t_atom *argv)
1521
{
1522
1523
1524
1525
1526
1527
1528
    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;
    }
1529
1530
1531
1532
1533
1534
1535
1536
1537
    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)
        {
1538
1539
1540
1541
1542
            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;
1543
1544
1545
1546
1547
1548
        }
        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++);
1549
1550
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            fielddesc_setsymbol_const(x->x_fill,
                gensym(rgb_to_hex(r, g, b)));
            x->x_filltype = 1;
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        }
        if (argc && (argv->a_type == A_FLOAT || argv->a_type == A_SYMBOL))
        {
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            svg_fillopacity(x, gensym("fill-opacity"), argc, argv);
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        }
    }
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    svg_update(x, s);
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}

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void svg_stroke(t_svg *x, t_symbol *s, t_int argc, t_atom *argv)
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{
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    if (argc <= 0)
        x->x_stroketype = 0;
    else if (argc == 1 && argv->a_type == A_SYMBOL)
    {
        fielddesc_setsymbol_const(x->x_stroke, atom_getsymbolarg(0, argc, argv));
        x->x_stroketype = 1;
    }
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    else if (argc > 2)
    {
        int var = 0, i;
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	t_fielddesc *fd = x->x_stroke;
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        for(i = 0; i < argc; i++)
            var = (argv[i].a_type == A_SYMBOL) ? 1 : var;
        if (var)
        {
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            fielddesc_setfloatarg(fd, argc--, argv++);
            fielddesc_setfloatarg(fd+1, argc--, argv++);
            fielddesc_setfloatarg(fd+2, argc--, argv++);
            x->x_stroketype = 2;
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        }
        else
        {
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            /* if no variables, then precompute a_stroke so it doesn't
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               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++);
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            fielddesc_setsymbol_const(x->x_stroke,
                gensym(rgb_to_hex(r, g, b)));
            x->x_stroketype = 1;
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        }
        if (argc && (argv->a_type == A_FLOAT || argv->a_type == A_SYMBOL))
        {
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            svg_strokeopacity(x, s, argc, argv);
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            return;
        }
    }
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    svg_update(x, s);
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}

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void svg_strokelinecap(t_svg *x, t_symbol *s,
    t_int argc, t_atom *argv)
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{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
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        fielddesc_setfloatarg(&x->x_strokelinecap.a_attr, argc, argv);
        x->x_strokelinecap.a_flag = 1;
        svg_update(x, s);
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    }
}

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void svg_strokelinejoin(t_svg *x, t_symbol *s,
    t_int argc, t_atom *argv)
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{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
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        fielddesc_setfloatarg(&x->x_strokelinejoin.a_attr, argc, argv);
        x->x_strokelinejoin.a_flag = 1;
        svg_update(x, s);
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    }
}

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void svg_strokemiterlimit(t_svg *x, t_symbol *s,
    t_int argc, t_atom *argv)
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{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
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        fielddesc_setfloatarg(&x->x_strokemiterlimit.a_attr, argc, argv);
        x->x_strokemiterlimit.a_flag = 1;
        svg_update(x, s);
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    }
}

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void svg_strokewidth(t_svg *x, t_symbol *s, t_int argc, t_atom *argv)
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{
    if (argv[0].a_type == A_FLOAT || argv[0].a_type == A_SYMBOL)
    {
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        fielddesc_setfloatarg(&x->x_strokewidth.a_attr, argc, argv);
        x->x_strokewidth.a_flag = 1;
        svg_update(x, s);
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    }
}

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

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void svg_rx(t_svg *x, t_symbol *s, int argc, t_atom *argv)
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{
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    if (x->x_type != gensym("rect"))
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    {
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        pd_error(x, "draw: %s: no method for 'rx'", x->x_type->s_name);
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        return;
    }
    if (!argc || argv->a_type != A_FLOAT)
    {
        pd_error(x, "draw: rect: bad arguments for method 'rx'");
        return;
    }
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    fielddesc_setfloatarg(&x->x_rx.a_attr, argc, argv);
    x->x_rx.a_flag = 1;
    svg_update(x, s);
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}

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void svg_ry(t_svg *x, t_symbol *s, int argc, t_atom *argv)
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{
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    if (x->x_type != gensym("rect"))
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    {
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        pd_error(x, "draw: %s: no method for 'ry'", x->x_type->s_name);
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        return;
    }
    if (!argc || argv->a_type != A_FLOAT)
    {
        pd_error(x, "draw: rect: bad arguments for method 'ry'");
        return;
    }
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    fielddesc_setfloatarg(&x->x_ry.a_attr, argc, argv);
    x->x_ry.a_flag = 1;
    svg_update(x, s);
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}

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static int minv(t_float a[][3], t_float b[][3])
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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. */
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static void mmult(t_float a[][3], t_float b[][3], t_float c[][3])
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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];
}

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static void mset(t_float mtx[][3], t_float m1, t_float m2, t_float m3,
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    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... */
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static void mget(t_float mtx[][3], t_float *mp1, t_float *mp2, t_float *mp3,
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    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];
}

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void svg_parsetransform(t_svg *x, t_template *template, t_word *data,
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    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];
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    mset(m, 1, 0, 0, 1, 0, 0); /* init to the identity matrix... */
    mset(m2, 0, 0, 0, 0, 0, 0);
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    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--;
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           mset(m2, 1, 0, 0, 1, tx, ty);
           mmult(m, m2, m);
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        }
        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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    } 
}

extern void scalar_select(t_gobj *z, t_glist *owner, int state);
extern void scalar_drawselectrect(t_scalar *x, t_glist *glist, int state);
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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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    //t_template *warn_template = NULL;
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    t_canvas *visible = c;
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    t_canvas *parent = canvas_templatecanvas_forgroup(svg_parentcanvas(x));
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    while(visible->gl_isgraph && visible->gl_owner)
        visible = visible->gl_owner;
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    /* 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.
    */
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    if (x->x_type == gensym("group"))
        svg_group_pathrect_cache(x, 0);
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    else if (x->x_pathrect_cache != -1)
        x->x_pathrect_cache = 0;
    for (g = c->gl_list; g; g = g->g_next)
    {
        if (glist_isvisible(c) && g->g_pd == scalar_class &&
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            parent ==
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            template_findcanvas((template = template_findbyname(
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                (((t_scalar *)g)->sc_template)))) &&
            template->t_transformable == 0
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           )
        {
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            //fprintf(stderr,"draw_doupdatetransform > template:%lx(%s)
            //    transform:%d\n", (t_int)template,
            //    ((t_scalar *)g)->sc_template->s_name,
            //    template->t_transformable);
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            t_float m1, m2, m3, m4, m5, m6;
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            svg_parsetransform(x, template, ((t_scalar *)g)->sc_vec,
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                &m1, &m2, &m3, &m4, &m5, &m6);
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            if (x->x_type == gensym("group"))
            {
                sys_vgui(".x%lx.c itemconfigure .dgroup%lx.%lx -matrix "
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                    "{ {%g %g} {%g %g} {%g %g} }\n",
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                    visible, x->x_parent, ((t_scalar *)g)->sc_vec,
                    m1, m2, m3, m4, m5, m6);
            }
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            else
                sys_vgui(".x%lx.c itemconfigure .draw%lx.%lx -matrix "
                    "{ {%g %g} {%g %g} {%g %g} }\n",
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                    visible, x->x_parent, ((t_scalar*)g)->sc_vec,
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                    m1, m2, m3, m4, m5, m6);
            /* uncache the scalar's bbox */
            ((t_scalar *)g)->sc_bboxcache = 0;
            if (glist_isselected(c, &((t_scalar *)g)->sc_gobj))
            {
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                //scalar_select(g, c, 1);
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                scalar_drawselectrect((t_scalar *)g, c, 0);
                scalar_drawselectrect((t_scalar *)g, c, 1);
            }
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            sys_vgui("pdtk_canvas_getscroll .x%lx.c\n", visible);
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        } 
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        /*else if (template != NULL && warn_template != template)
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        {
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            // this is not a transformable template, warn user of that
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            post("warning: transform ignored on the template %s because it includes an array", template->t_sym->s_name);
            warn_template = template;
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        }*/
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        if (g->g_pd == canvas_class)
        {
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            svg_doupdatetransform(x, (t_glist *)g);
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        }
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    }
}

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void svg_queueupdatetransform(t_gobj *g, t_glist *glist)
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{
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    /* not sure about this... */
    t_svg *x = (t_svg *)((t_draw *)g);
    svg_doupdatetransform(x, glist);
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}

extern t_canvas *canvas_list;
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void svg_updatetransform(t_svg *x)
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{
    t_canvas *c;
    int i;
    for (c = canvas_list; c; c = c->gl_next)
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        svg_doupdatetransform(x, c);