-/* 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
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include <stdio.h>
+#include <stdlib.h>
#include <memory.h>
#include <math.h>
+#include <string.h>
#include <assert.h>
#include "gfxtools.h"
+#include "gfxfont.h"
typedef struct _linedraw_internal
{
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 = rfx_alloc(sizeof(gfxline_t));
+ 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))) {
return;
}
+ l->sx = l->sy = 0;
d->x = l->x = x;
d->y = l->y = y;
l->next = 0;
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 = rfx_alloc(sizeof(gfxline_t));
+ 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
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 = rfx_alloc(sizeof(gfxline_t));
+ 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
}
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)
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", r[0], phase);
return;
}
gfxline_t*dest = 0;
gfxline_t*pos = 0;
while(line) {
- gfxline_t*n = rfx_calloc(sizeof(gfxline_t));
+ gfxline_t*n = (gfxline_t*)rfx_calloc(sizeof(gfxline_t));
*n = *line;
n->next = 0;
if(!pos) {
}
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;
if(l->type == gfx_lineTo && next->type == gfx_lineTo) {
double dx = l->x-x;
double dy = l->y-y;
- double nx = next->x-x;
- double ny = next->y-y;
+ double nx = next->x-l->x;
+ double ny = next->y-l->y;
if(fabs(dx*ny - dy*nx) < 0.000001 && (dx*nx + dy*ny) >= 0) {
combine = 1;
}
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;
}
+void gfxbbox_intersect(gfxbbox_t*box1, gfxbbox_t*box2)
+{
+ if(box2->xmin > box1->xmin)
+ box1->xmin = box2->xmin;
+ if(box2->ymin > box1->ymin)
+ box1->ymin = box2->ymin;
+ if(box2->xmax < box1->xmax)
+ box1->xmax = box2->xmax;
+ if(box2->ymax > box1->ymax)
+ box1->ymax = box2->ymax;
+ if(box1->xmin > box1->xmax)
+ box1->xmax = box1->xmin;
+ if(box1->ymin > box1->ymax)
+ box1->ymax = box1->ymin;
+}
+
gfxbbox_t gfxline_getbbox(gfxline_t*line)
{
gfxcoord_t x=0,y=0;
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_multiply(gfxmatrix_t*m1, gfxmatrix_t*m2, gfxmatrix_t*dest)
{
- dest->m00 = m1->m00*m2->m00 + m1->m10*m2->m01 + m1->tx;
- dest->m01 = m1->m01*m2->m00 + m1->m11*m2->m01 + m1->ty;
- dest->m10 = m1->m00*m2->m10 + m1->m10*m2->m11 + m1->tx;
- dest->m11 = m1->m01*m2->m10 + m1->m11*m2->m11 + m1->ty;
+ dest->m00 = m1->m00*m2->m00 + m1->m10*m2->m01;
+ dest->m01 = m1->m01*m2->m00 + m1->m11*m2->m01;
+ dest->m10 = m1->m00*m2->m10 + m1->m10*m2->m11;
+ dest->m11 = m1->m01*m2->m10 + m1->m11*m2->m11;
dest->tx = m1->m00*m2->tx + m1->m10*m2->ty + m1->tx;
dest->ty = m1->m01*m2->tx + m1->m11*m2->ty + m1->ty;
}
gfxfontlist_t*last=0,*l = list;
while(l) {
last = l;
- if(!strcmp((char*)l->font->id, font->id)) {
+ if(l->font == font) {
return list; // we already know this font
}
l = l->next;
return l;
}
}
+void gfxfontlist_free(gfxfontlist_t*list, char deletefonts)
+{
+ gfxfontlist_t*l = list;
+ while(l) {
+ gfxfontlist_t*next = l->next;
+ if(deletefonts && l->font) {
+ gfxfont_free(l->font);l->font=0;
+ }
+ l->next = 0;
+ free(l);
+ l = next;
+ }
+}
gfxline_t*gfxline_makerectangle(int x1,int y1,int x2, int y2)
{
line[4].x = x1;line[4].y = y1;line[4].type = gfx_lineTo;
return line;
}
+
+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;
+ int size = img->width*img->height;
+
+ int rr,rg,rb,ra, tr;
+ int gr,gg,gb,ga, tg;
+ int br,bg,bb,ba, tb;
+ int ar,ag,ab,aa, ta;
+ rr = (int)(cxform->rr*256);gr = (int)(cxform->gr*256);
+ rg = (int)(cxform->rg*256);gg = (int)(cxform->gg*256);
+ rb = (int)(cxform->rb*256);gb = (int)(cxform->gb*256);
+ ra = (int)(cxform->ra*256);ga = (int)(cxform->ga*256);
+ br = (int)(cxform->br*256);ar = (int)(cxform->ar*256);tr = (int)(cxform->tr*256);
+ bg = (int)(cxform->bg*256);ag = (int)(cxform->ag*256);tg = (int)(cxform->tg*256);
+ bb = (int)(cxform->bb*256);ab = (int)(cxform->ab*256);tb = (int)(cxform->tb*256);
+ ba = (int)(cxform->ba*256);aa = (int)(cxform->aa*256);ta = (int)(cxform->ta*256);
+
+ for(t=0;t<size;t++) {
+ gfxcolor_t*pixel = &img->data[t];
+ unsigned char r = (pixel->r * rr + pixel->g * rg + pixel->b * rb + pixel->a * ra + tr) / 256;
+ unsigned char g = (pixel->r * gr + pixel->g * gg + pixel->b * gb + pixel->a * ga + tg) / 256;
+ unsigned char b = (pixel->r * br + pixel->g * bg + pixel->b * bb + pixel->a * ba + tb) / 256;
+ unsigned char a = (pixel->r * ar + pixel->g * ag + pixel->b * ab + pixel->a * aa + ta) / 256;
+ pixel->r = r;
+ pixel->g = g;
+ pixel->b = b;
+ 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;
+ }
+}
+
git.asbjorn.biz / swftools.git / blobdiff