-/* gfxtools.c
+/* gfxtools.c
Various utility functions for dealing with gfxdevices.
Part of the swftools package.
- Copyright (c) 2005 Matthias Kramm <kramm@quiss.org>
+ Copyright (c) 2005 Matthias Kramm <kramm@quiss.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include <assert.h>
#include "gfxtools.h"
#include "gfxfont.h"
+#include "jpeg.h"
+#include "q.h"
typedef struct _linedraw_internal
{
gfxline_t*start;
gfxline_t*next;
+ gfxcoord_t x0,y0;
+ char has_moveto;
} linedraw_internal_t;
static void linedraw_moveTo(gfxdrawer_t*d, gfxcoord_t x, gfxcoord_t y)
linedraw_internal_t*i = (linedraw_internal_t*)d->internal;
gfxline_t*l = (gfxline_t*)rfx_alloc(sizeof(gfxline_t));
l->type = gfx_moveTo;
- if((int)((d->x * 5120) == (int)(x * 5120)) &&
- (int)((d->y * 5120) == (int)(y * 5120))) {
- /* never mind- we're already there */
- return;
-
- }
+ i->has_moveto = 1;
+ i->x0 = x;
+ i->y0 = y;
l->sx = l->sy = 0;
d->x = l->x = x;
d->y = l->y = y;
static void linedraw_lineTo(gfxdrawer_t*d, gfxcoord_t x, gfxcoord_t y)
{
linedraw_internal_t*i = (linedraw_internal_t*)d->internal;
- gfxline_t*l = (gfxline_t*)rfx_alloc(sizeof(gfxline_t));
-
- if(!i->start) {
- /* starts with a line, not with a moveto. That needs we first
- need an explicit moveto to (0,0) */
- linedraw_moveTo(d, 0, 0);
+ if(!i->has_moveto) {
+ /* starts with a line, not with a moveto. As this is the first
+ entry in the list, this is probably *meant* to be a moveto */
+ linedraw_moveTo(d, x, y);
+ return;
}
-
+
+ gfxline_t*l = (gfxline_t*)rfx_alloc(sizeof(gfxline_t));
l->type = gfx_lineTo;
d->x = l->x = x;
d->y = l->y = y;
static void linedraw_splineTo(gfxdrawer_t*d, gfxcoord_t sx, gfxcoord_t sy, gfxcoord_t x, gfxcoord_t y)
{
linedraw_internal_t*i = (linedraw_internal_t*)d->internal;
- gfxline_t*l = (gfxline_t*)rfx_alloc(sizeof(gfxline_t));
-
- if(!i->start) {
- /* starts with a line, not with a moveto. That needs we first
- need an explicit moveto to (0,0) */
- linedraw_moveTo(d, 0, 0);
+ if(!i->has_moveto) {
+ linedraw_moveTo(d, x, y);
+ return;
}
+ gfxline_t*l = (gfxline_t*)rfx_alloc(sizeof(gfxline_t));
l->type = gfx_splineTo;
- d->x = l->x = x;
+ d->x = l->x = x;
d->y = l->y = y;
- l->sx = sx;
+ l->sx = sx;
l->sy = sy;
l->next = 0;
if(i->next)
if(!i->start)
i->start = l;
}
+static void linedraw_close(gfxdrawer_t*d)
+{
+ linedraw_internal_t*i = (linedraw_internal_t*)d->internal;
+ if(!i->has_moveto)
+ return;
+ linedraw_lineTo(d, i->x0, i->y0);
+ i->has_moveto = 0;
+ i->x0 = 0;
+ i->y0 = 0;
+}
static void* linedraw_result(gfxdrawer_t*d)
{
linedraw_internal_t*i = (linedraw_internal_t*)d->internal;
d->moveTo = linedraw_moveTo;
d->lineTo = linedraw_lineTo;
d->splineTo = linedraw_splineTo;
+ d->close = linedraw_close;
d->result = linedraw_result;
}
static void mkspline(qspline_abc_t*s, double x, double y, gfxline_t*l)
{
- /*
+ /*
Form 1: x = t*t*l->x + 2*t*(1-t)*l->sx + (1-t)*(1-t)*x;
Form 2: x = a*t*t + b*t + c
*/
double dy = s->ay*(2*i+1)*r2 + s->by*r;
len += sqrt(dx*dx+dy*dy);
}
- /*printf("Spline from %f,%f to %f,%f has len %f (%f)\n", s->cx, s->cy,
+ /*printf("Spline from %f,%f to %f,%f has len %f (%f)\n", s->cx, s->cy,
s->cx + s->bx + s->ax,
s->cy + s->by + s->ay, len,
sqrt((s->bx + s->ax)*(s->bx + s->ax) + (s->by + s->ay)*(s->by + s->ay))
double x=0,y=0;
double linepos,nextpos;
char on;
- int apos;
+ int apos=0;
if(line && line->type != gfx_moveTo) {
fprintf(stderr, "gfxtool: outline doesn't start with a moveTo");
return;
}
- if(!r || r[0]<0 || phase<0) {
- fprintf(stderr, "gfxtool: invalid dashes");
+
+ int i;
+ double dashlen=0;
+ for(i=0;r[i]>=0;i++) {
+ dashlen+=r[i];
+ }
+ if(!r || (r[0]<=0 && r[0]>-0.01) || dashlen<0.001) {
+ // no dashing. just draw the thing
+ while(line) {
+ if(line->type == gfx_moveTo) {
+ d->moveTo(d, line->x, line->y);
+ } else if(line->type == gfx_lineTo) {
+ d->lineTo(d, line->x, line->y);
+ } else if(line->type == gfx_splineTo) {
+ d->splineTo(d, line->sx, line->sy, line->x, line->y);
+ }
+ line = line->next;
+ }
+ return;
+ }
+ if(r[0]<0 || phase<0) {
+ fprintf(stderr, "gfxtool: invalid (negative) dashes: %f, phase=%f\n", r[0], phase);
return;
}
}
return dest;
}
+
+static char splineIsStraight(double x, double y, gfxline_t*l)
+{
+ if(l->type == gfx_moveTo)
+ return 0;
+ if(l->type == gfx_lineTo)
+ return 1;
+ double dx = l->x-x;
+ double dy = l->y-y;
+ double sx = l->sx-x;
+ double sy = l->sy-y;
+ if(fabs(dx*sy - dy*sx) < 0.000001 && (dx*sx + dy*sy) >= 0) {
+ return 1;
+ }
+ return 0;
+}
+
void gfxline_optimize(gfxline_t*line)
{
gfxline_t*l = line;
/* step 1: convert splines to lines, where possible */
double x=0,y=0;
while(l) {
- if(l->type == gfx_splineTo) {
- double dx = l->x-x;
- double dy = l->y-y;
- double sx = l->sx-x;
- double sy = l->sy-y;
- if(fabs(dx*sy - dy*sx) < 0.000001 && (dx*sx + dy*sy) >= 0) {
- l->type = gfx_lineTo;
- }
+ if(l->type == gfx_splineTo && splineIsStraight(x,y,l)) {
+ l->type = gfx_lineTo;
}
x = l->x;
y = l->y;
unsigned int istart = 0;
int num = 0;
int level = 0;
-
+
while(istart<0x80000000)
{
unsigned int iend = istart + istep;
/* depending on where we are in the spline, we either try to match
the left or right tangent */
- if(start<0.5)
+ if(start<0.5)
left=1;
/* get derivative */
pos = left?start:end;
qpos = pos*pos;
- test.control.x = s->end.x*(3*qpos) + 3*s->control2.x*(2*pos-3*qpos) +
+ test.control.x = s->end.x*(3*qpos) + 3*s->control2.x*(2*pos-3*qpos) +
3*s->control1.x*(1-4*pos+3*qpos) + s->start.x*(-3+6*pos-3*qpos);
- test.control.y = s->end.y*(3*qpos) + 3*s->control2.y*(2*pos-3*qpos) +
+ test.control.y = s->end.y*(3*qpos) + 3*s->control2.y*(2*pos-3*qpos) +
3*s->control1.y*(1-4*pos+3*qpos) + s->start.y*(-3+6*pos-3*qpos);
if(left) {
test.control.x *= (end-start)/2;
}
#else // quadratic error: *much* faster!
- /* convert control point representation to
+ /* convert control point representation to
d*x^3 + c*x^2 + b*x + a */
dx= s->end.x - s->control2.x*3 + s->control1.x*3 - s->start.x;
dy= s->end.y - s->control2.y*3 + s->control1.y*3 - s->start.y;
-
- /* we need to do this for the subspline between [start,end], not [0,1]
+
+ /* we need to do this for the subspline between [start,end], not [0,1]
as a transformation of t->a*t+b does nothing to highest coefficient
of the spline except multiply it with a^3, we just need to modify
d here. */
dx*=m*m*m;
dy*=m*m*m;
}
-
+
/* use the integral over (f(x)-g(x))^2 between 0 and 1
- to measure the approximation quality.
+ to measure the approximation quality.
(it boils down to const*d^2) */
recurse = (dx*dx + dy*dy > quality2);
#endif
c.control2.y = c2y;
c.end.x = x;
c.end.y = y;
-
+
num = approximate3(&c, q, 128, maxerror);
for(t=0;t<num;t++) {
return box;
}
+gfxbbox_t gfxbbox_expand_to_bbox(gfxbbox_t box, gfxbbox_t box2)
+{
+ gfxbbox_expand_to_point(box, box2.xmin, box2.ymin);
+ gfxbbox_expand_to_point(box, box2.xmax, box2.ymax);
+ return box;
+}
+
void gfxbbox_intersect(gfxbbox_t*box1, gfxbbox_t*box2)
{
if(box2->xmin > box1->xmin)
return bbox;
}
-void gfxline_dump(gfxline_t*line, FILE*fi, char*prefix)
-{
- while(line) {
- if(line->type == gfx_moveTo) {
- fprintf(fi, "%smoveTo %.2f %.2f\n", prefix, line->x, line->y);
- } else if(line->type == gfx_lineTo) {
- fprintf(fi, "%slineTo %.2f %.2f\n", prefix, line->x, line->y);
- } else if(line->type == gfx_splineTo) {
- fprintf(fi, "%ssplineTo (%.2f %.2f) %.2f %.2f\n", prefix, line->sx, line->sy, line->x, line->y);
- }
- line = line->next;
- }
-}
-
gfxline_t* gfxline_append(gfxline_t*line1, gfxline_t*line2)
{
gfxline_t*l = line1;;
void gfxmatrix_dump(gfxmatrix_t*m, FILE*fi, char*prefix)
{
- fprintf(fi, "%f %f | %f\n", m->m00, m->m10, m->tx);
- fprintf(fi, "%f %f | %f\n", m->m01, m->m11, m->ty);
+ fprintf(fi, "%s%f %f | %f\n", prefix, m->m00, m->m10, m->tx);
+ fprintf(fi, "%s%f %f | %f\n", prefix, m->m01, m->m11, m->ty);
}
void gfxmatrix_transform(gfxmatrix_t*m, double* v, double*dest)
}
return 0;
}
-gfxfontlist_t*gfxfontlist_addfont(gfxfontlist_t*list, gfxfont_t*font)
+void*gfxfontlist_getuserdata(gfxfontlist_t*list, const char*id)
+{
+ gfxfontlist_t*l = list;
+ while(l) {
+ if(!strcmp((char*)l->font->id, id)) {
+ return l->user;
+ }
+ l = l->next;
+ }
+ return 0;
+}
+gfxfontlist_t*gfxfontlist_addfont2(gfxfontlist_t*list, gfxfont_t*font, void*user)
{
gfxfontlist_t*last=0,*l = list;
while(l) {
}
l = (gfxfontlist_t*)rfx_calloc(sizeof(gfxfontlist_t));
l->font = font;
+ l->user = user;
l->next = 0;
if(last) {
last->next = l;
return l;
}
}
+gfxfontlist_t*gfxfontlist_addfont(gfxfontlist_t*list, gfxfont_t*font)
+{
+ return gfxfontlist_addfont2(list, font, 0);
+}
void gfxfontlist_free(gfxfontlist_t*list, char deletefonts)
{
gfxfontlist_t*l = list;
}
}
-gfxline_t*gfxline_makerectangle(int x1,int y1,int x2, int y2)
+gfxline_t*gfxline_makerectangle(double x1,double y1,double x2, double y2)
{
gfxline_t* line = (gfxline_t*)rfx_calloc(sizeof(gfxline_t)*5);
line[0].x = x1;line[0].y = y1;line[0].type = gfx_moveTo;line[0].next = &line[1];
return line;
}
+gfxline_t*gfxline_makecircle(double x,double y,double rx, double ry)
+{
+ double C1 = 0.2930;
+ double C2 = 0.4140;
+ double begin = 0.7070;
+ gfxline_t** line = (gfxline_t**)rfx_calloc(sizeof(gfxline_t*)*9);
+ int t;
+ for(t=0;t<9;t++) {
+ line[t] = rfx_calloc(sizeof(gfxline_t));
+ }
+ line[0]->type = gfx_moveTo;
+ line[0]->x = x+begin*rx;
+ line[0]->y = y+begin*ry;
+ for(t=1;t<9;t++) {
+ line[t-1]->next = line[t];
+ line[t]->type = gfx_splineTo;
+ }
+ line[8]->next = 0;
+#define R(nr,cx,cy,mx,my) \
+ line[nr]->sx = line[nr-1]->x + (cx); \
+ line[nr]->sy = line[nr-1]->y + (cy); \
+ line[nr]->x = line[nr]->sx + (mx); \
+ line[nr]->y = line[nr]->sy + (my);
+ R(1, -C1*rx, C1*ry, -C2*rx, 0);
+ R(2, -C2*rx, 0, -C1*rx, -C1*ry);
+ R(3, -C1*rx, -C1*ry, 0, -C2*ry);
+ R(4, 0, -C2*ry, C1*rx, -C1*ry);
+ R(5, C1*rx, -C1*ry, C2*rx, 0);
+ R(6, C2*rx, 0, C1*rx, C1*ry);
+ R(7, C1*rx, C1*ry, 0, C2*ry);
+ R(8, 0, C2*ry, -C1*rx, C1*ry);
+ gfxline_t*l = line[0];
+ free(line);
+ return l;
+}
+
+gfxbbox_t* gfxline_isrectangle(gfxline_t*_l)
+{
+ if(!_l)
+ return 0;
+
+ gfxline_t*l = gfxline_clone(_l);
+ gfxline_optimize(l);
+
+ double x1,x2,y1,y2;
+ int xc=0,yc=0;
+ char corners=0;
+
+ char prev=0;
+ char fail=0;
+ for(;l; l=l->next) {
+ double x = l->x;
+ double y = l->y;
+
+ char top=0,left=0;
+
+ if(xc==2 && x!=x1 && x!=x2) {fail=1;break;}
+ else if(xc>=1 && x==x1) {left=0;}
+ else if(xc==2 && x==x2) {left=1;}
+ else if(xc==1 && x!=x1) {x2 = x; xc=2; left=1;}
+ else if(xc==0) {x1 = x; xc=1;left=0;}
+ else {fprintf(stderr, "Internal error in rectangle detection\n");}
+
+ if(yc==2 && y!=y1 && y!=y2) {fail=1;break;}
+ else if(yc>=1 && y==y1) {top=0;}
+ else if(yc==2 && y==y2) {top=1;}
+ else if(yc==1 && y!=y1) {y2 = y; yc=2; top=1;}
+ else if(yc==0) {y1 = y; yc=1;top=0;}
+ else {fprintf(stderr, "Internal error in rectangle detection\n");}
+
+ char pos=top<<1|left;
+
+ if((pos^prev)==3) {
+ /* diagonal lines not allowed */
+ fail=1;break;
+ }
+ prev = pos;
+
+ /* no corner except the first one may be touched twice */
+ if(pos && (corners & 1<<pos)) {
+ fail=1;break;
+ }
+ /* mark which corners have been touched so far */
+ corners |= 1<<pos;
+ }
+ if(fail) {
+ gfxline_free(l);
+ return 0;
+ }
+
+ if(corners!=0x0f) return 0; // not all 4 corners reached
+
+ if(x2<x1) {double x = x2;x2=x1;x1=x;}
+ if(y2<y1) {double y = y2;y2=y1;y1=y;}
+
+ gfxbbox_t*r = malloc(sizeof(gfxbbox_t));
+ r->xmin = x1; r->ymin = y1;
+ r->xmax = x2; r->ymax = y2;
+ return r;
+}
+
void gfximage_transform(gfximage_t*img, gfxcxform_t*cxform)
{
int t;
pixel->a = a;
}
}
+void gfxline_dump(gfxline_t*line, FILE*fi, char*prefix)
+{
+ while(line) {
+ if(line->type == gfx_moveTo) {
+ fprintf(fi, "%smoveTo %.2f %.2f\n", prefix, line->x, line->y);
+ } else if(line->type == gfx_lineTo) {
+ fprintf(fi, "%slineTo %.2f %.2f\n", prefix, line->x, line->y);
+ } else if(line->type == gfx_splineTo) {
+ fprintf(fi, "%ssplineTo (%.2f %.2f) %.2f %.2f\n", prefix, line->sx, line->sy, line->x, line->y);
+ }
+ line = line->next;
+ }
+}
+
+static char gfxpoint_equals(void*c1, void*c2)
+{
+ return !memcmp(c1, c2, sizeof(gfxpoint_t));
+}
+static unsigned int gfxpoint_hash(void*c)
+{
+ return string_hash3(c, sizeof(gfxpoint_t));
+}
+static void* gfxpoint_clone(void*c)
+{
+ void*n = malloc(sizeof(gfxpoint_t));
+ memcpy(n, c, sizeof(gfxpoint_t));
+ return n;
+}
+static void gfxpoint_destroy(void*c)
+{
+ free(c);
+}
+static type_t gfxpoint_type = {
+ hash: (hash_func)gfxpoint_hash,
+ equals: (equals_func)gfxpoint_equals,
+ dup: (dup_func)gfxpoint_clone,
+ free: (free_func)gfxpoint_destroy,
+};
+
+gfxline_t* gfxline_restitch(gfxline_t*line)
+{
+ dict_t*ff = dict_new2(&gfxpoint_type);
+ dict_t*rev = dict_new2(&gfxpoint_type);
+
+ gfxline_t*prev=0;
+ while(line) {
+ gfxline_t*next = line->next;
+ if(line->type == gfx_moveTo && (line->next && line->next->type != gfx_moveTo)) {
+ gfxpoint_t xy = {line->x, line->y};
+ dict_put(ff, &xy, line);
+ prev = line;
+ } else if(!line->next || line->next->type == gfx_moveTo) {
+ if(prev) {
+ gfxpoint_t xy = {line->x, line->y};
+ dict_put(rev, &xy, prev);
+ line->next = 0;
+ }
+ }
+ line = next;
+ }
+
+ gfxpoint_t pos = {0,0};
+
+ gfxline_t*result = 0;
+ gfxline_t*last = 0;
+
+ char first = 1;
+ while(dict_count(ff)) {
+ char reverse = 0, stitch = 1;
+ gfxline_t*l = dict_lookup(ff, &pos);
+ if(l) {
+ char d = dict_del2(ff,&pos,l);assert(d);
+ } else {
+ l = dict_lookup(rev, &pos);
+ if(l) {
+ reverse = 1;
+ char d = dict_del2(rev,&pos,l);assert(d);
+ }
+ }
+ if(!l) {
+ /* try to find *any* entry. this is costly, but
+ doesn't happen too often */
+ stitch = 0;
+ DICT_ITERATE_DATA(ff, gfxline_t*, l2) {
+ l = l2;
+ break;
+ }
+ assert(l);
+ gfxpoint_t xy = {l->x,l->y};
+ char d = dict_del2(ff,&xy,l);assert(d);
+ }
+
+ gfxline_t*end = l;
+ if(!reverse) {
+ while(end->next) end = end->next;
+ pos.x = end->x;
+ pos.y = end->y;
+ char d = dict_del2(rev,&pos,l);assert(d);
+ } else {
+ l = gfxline_reverse(l);
+ pos.x = end->x;
+ pos.y = end->y;
+ char d = dict_del2(ff,&pos,end);assert(d);
+ }
+
+ assert(l->type == gfx_moveTo);
+ if(stitch && !first) {
+ /* cut away the moveTo */
+ gfxline_t*next = l->next;
+ free(l);
+ l = next;
+ }
+
+ if(!last) {
+ result = l;
+ last = end;
+ } else {
+ last->next = l;
+ last = end;
+ }
+ first = 0;
+ }
+ dict_destroy(ff);
+ dict_destroy(rev);
+ return result;
+}
+
+gfxline_t* gfxline_reverse(gfxline_t*line)
+{
+ gfxline_t*b = 0;
+ while(line) {
+ gfxline_t*next = line->next;
+ if(next && next->type != gfx_moveTo) {
+ line->type = next->type;
+ line->sx = next->sx;
+ line->sy = next->sy;
+ } else {
+ line->type = gfx_moveTo;
+ }
+ line->next = b;
+ b = line;
+ line = next;
+ }
+ return b;
+}
+
+void gfxgradient_destroy(gfxgradient_t*gradient)
+{
+ while(gradient) {
+ gfxgradient_t*next = gradient->next;
+ free(gradient);
+ gradient = next;
+ }
+}
+
+gfxparams_t* gfxparams_new()
+{
+ return (gfxparams_t*)rfx_calloc(sizeof(gfxparams_t));
+}
+
+void gfxparams_store(gfxparams_t*params, const char*key, const char*value)
+{
+ gfxparam_t*o = params->params;
+ while(o) {
+ if(!strcmp(key, o->key)) {
+ /* overwrite old value */
+ free((void*)o->value);
+ o->value = strdup(value);
+ return;
+ }
+ o = o->next;
+ }
+ gfxparam_t*p = (gfxparam_t*)malloc(sizeof(gfxparam_t));
+ p->key = strdup(key);
+ p->value = strdup(value);
+ p->next = 0;
+
+ if(params->last) {
+ params->last->next = p;
+ params->last = p;
+ } else {
+ params->params = p;
+ params->last = p;
+ }
+}
+
+void gfxparams_free(gfxparams_t*params)
+{
+ gfxparam_t*p = params->params;
+ while(p) {
+ gfxparam_t*next = p->next;
+ free((void*)p->key);
+ if(p->value) free((void*)p->value);
+ free(p);
+ p = next;
+ }
+ free(params);
+}
+
git.asbjorn.biz / swftools.git / blobdiff