X-Git-Url: http://git.asbjorn.biz/?p=swftools.git;a=blobdiff_plain;f=lib%2Fgfxtools.c;h=e79e6fefd672f78c7a7c71a3213fd8d6f1a2df2e;hp=76525ea502ed72578aa21390bbd6c6c234334aa7;hb=bf04757cd94e94c1f67fa3d2a4e3e59fa5bce0c0;hpb=a5c6cfc6f6b4ffdcee8e63116b0c507b0388cac0

diff --git a/lib/gfxtools.c b/lib/gfxtools.c
index 76525ea..e79e6fe 100644
--- a/lib/gfxtools.c
+++ b/lib/gfxtools.c
@@ -1,10 +1,10 @@
-/* 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
@@ -21,10 +21,13 @@
    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
 {
@@ -35,7 +38,7 @@ 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))) {
@@ -43,6 +46,7 @@ static void linedraw_moveTo(gfxdrawer_t*d, gfxcoord_t x, gfxcoord_t y)
 	return;
 
     }
+    l->sx = l->sy = 0;
     d->x = l->x = x;
     d->y = l->y = y;
     l->next = 0;
@@ -55,7 +59,7 @@ static void linedraw_moveTo(gfxdrawer_t*d, gfxcoord_t x, gfxcoord_t 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 = 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
@@ -77,7 +81,7 @@ static void linedraw_lineTo(gfxdrawer_t*d, gfxcoord_t x, gfxcoord_t 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 = 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
@@ -86,9 +90,9 @@ static void linedraw_splineTo(gfxdrawer_t*d, gfxcoord_t sx, gfxcoord_t sy, gfxco
     }
 
     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)
@@ -141,7 +145,7 @@ typedef struct cspline_t
 
 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
     */
@@ -178,7 +182,7 @@ static double get_spline_len(qspline_abc_t*s)
 	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))
@@ -193,14 +197,34 @@ void gfxtool_draw_dashed_line(gfxdrawer_t*d, gfxline_t*line, float*r, float phas
     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;
     }
 
@@ -302,7 +326,7 @@ gfxline_t * gfxline_clone(gfxline_t*line)
     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) {
@@ -315,20 +339,31 @@ gfxline_t * gfxline_clone(gfxline_t*line)
     }
     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;
@@ -343,8 +378,8 @@ void gfxline_optimize(gfxline_t*line)
 	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;
 	    }
@@ -438,7 +473,7 @@ static int approximate3(const cspline_t*s, qspline_t*q, int size, double quality
     unsigned int istart = 0;
     int num = 0;
     int level = 0;
-    
+
     while(istart<0x80000000)
     {
 	unsigned int iend = istart + istep;
@@ -463,14 +498,14 @@ static int approximate3(const cspline_t*s, qspline_t*q, int size, double quality
 
 	/* 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;
@@ -515,12 +550,12 @@ static int approximate3(const cspline_t*s, qspline_t*q, int size, double quality
 	}
 #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. */
@@ -528,9 +563,9 @@ static int approximate3(const cspline_t*s, qspline_t*q, int size, double quality
 	 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
@@ -576,7 +611,7 @@ void gfxdraw_cubicTo(gfxdrawer_t*draw, double c1x, double c1y, double c2x, doubl
     c.control2.y = c2y;
     c.end.x = x;
     c.end.y = y;
-    
+
     num = approximate3(&c, q, 128, maxerror);
 
     for(t=0;t<num;t++) {
@@ -611,6 +646,22 @@ gfxbbox_t gfxbbox_expand_to_point(gfxbbox_t box, gfxcoord_t x, gfxcoord_t y)
     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;
@@ -636,20 +687,6 @@ gfxbbox_t gfxline_getbbox(gfxline_t*line)
     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;;
@@ -705,6 +742,21 @@ void gfxmatrix_invert(gfxmatrix_t*m, gfxmatrix_t*dest)
     dest->tx = -(dest->m00 * m->tx + dest->m10 * m->ty);
     dest->ty = -(dest->m01 * m->tx + dest->m11 * m->ty);
 }
+void gfxmatrix_unit(gfxmatrix_t*m)
+{
+    memset(m, 0, sizeof(gfxmatrix_t));
+    m->m00 = 1.0;
+    m->m11 = 1.0;
+}
+void gfxmatrix_multiply(gfxmatrix_t*m1, gfxmatrix_t*m2, gfxmatrix_t*dest)
+{
+    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* gfxfontlist_create()
 {
@@ -739,7 +791,7 @@ gfxfontlist_t*gfxfontlist_addfont(gfxfontlist_t*list, gfxfont_t*font)
     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;
@@ -757,6 +809,19 @@ gfxfontlist_t*gfxfontlist_addfont(gfxfontlist_t*list, gfxfont_t*font)
 	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)
 {
@@ -768,3 +833,113 @@ 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;
+    }
+}
+