3 static inline double sqr(double x) {return x*x;}
5 static void draw_line(float*row, float x1, float x2, float y1, float y2, int min, int max)
7 if(x2<x1) {int x=x1;x1=x2;x2=x;}
9 fprintf(stderr, "error: glyph x stroke out of bounds\n");
15 double d = sqrt(sqr(y2-y1)+sqr(x2-x1));
16 if(floor(x1)==floor(x2)) {
17 row[(int)floor(x1)] += d;
23 row[xx1] += i*(xx1-x1);
24 row[xx2] += i*(x2-xx2);
25 for(x=xx1;x<xx2;x++) {
31 static void draw_line_xy(float*row,float*column, float x1, float y1, float x2, float y2,SRECT* area)
33 draw_line(row, x1, x2, y1, y2, area->xmin, area->xmax);
34 draw_line(column, y1, y2, x1, x2, area->ymin, area->ymax);
37 static void find_best(float*_row, int width, int*_x1, int*_x2, int min_dist)
40 float max1=-1,max2=-1;
42 float*row = malloc(sizeof(float)*(width+1));
43 int filter_size = 100;
44 float* filter = malloc(sizeof(float)*(filter_size*2+1));
45 double var = filter_size/3;
46 for(t=-filter_size;t<=filter_size;t++) {
49 filter[filter_size+t] = exp(-r);
51 filter[0]=1;filter_size=0;
53 for(t=0;t<=width;t++) {
56 for(s=-filter_size;s<=filter_size;s++) {
58 if(t+s>width) continue;
59 sum += _row[t+s]*filter[s+filter_size];
64 for(t=0;t<=width;t++) {
70 // invalidate everything around the maximum
71 for(t=-min_dist+1;t<min_dist;t++) {
72 if(t+x1<0 || t+x1>width) continue;
75 for(t=0;t<=width;t++) {
82 if(x1>0 && x2>0 && x1>x2) {int x=x1;x1=x2;x2=x;}
88 static ALIGNZONE detect_for_char(SWFFONT * f, int nr)
90 SWFGLYPH*g = &f->glyph[nr];
91 SRECT b = f->layout->bounds[nr];
92 ALIGNZONE a = {0xffff,0xffff,0xffff,0xffff};
95 int by1=b.ymin,by2=b.ymax;
99 int width = b.xmax - b.xmin + 1;
100 int height = b.ymax - b.ymin + 1;
101 if(!width || !height)
104 float*row = rfx_calloc(sizeof(float)*width);
105 float*column = rfx_calloc(sizeof(float)*height);
107 SHAPE2*s = swf_ShapeToShape2(g->shape);
108 SHAPELINE*l = s->lines;
111 if(l->type == lineTo) {
112 draw_line_xy(row,column,x,-y,l->x,-l->y,&b);
113 } else if(l->type == splineTo) {
114 double x1=x,x2=l->sx,x3=l->x;
115 double y1=y,y2=l->sy,y3=l->y;
116 double c = fabs(x3-2*x2+x1) + fabs(y3-2*y2+y1);
117 int parts = ((int)(sqrt(c)/6))*2+1;
120 for(t=1;t<=parts;t++) {
121 float nx = ((t*t*x3 + 2*t*(parts-t)*x2 + (parts-t)*(parts-t)*x1)/(double)(parts*parts));
122 float ny = ((t*t*y3 + 2*t*(parts-t)*y2 + (parts-t)*(parts-t)*y1)/(double)(parts*parts));
123 draw_line_xy(row,column,xx,-yy,nx,-ny,&b);
135 /* find two best x values */
136 int x1=-1,y1=-1,x2=-1,y2=-1;
137 //int min_dist = 4000;
139 find_best(row,width,&x1,&x2,min_dist);
140 find_best(column,height,&y1,&y2,min_dist);
142 if(x1>=0) a.x = floatToF16((x1+b.xmin) / 20480.0);
143 if(x2>=0) a.dx = floatToF16((x2-x1) / 20480.0);
144 if(y1>=0) a.y = floatToF16((y1+b.ymin) / 20480.0);
145 if(y2>=0) a.dy = floatToF16((y2-y1) / 20480.0);
149 void swf_FontCreateAlignZones(SWFFONT * f)
155 fprintf(stderr, "Error: font needs a layout for alignzones to be detected.");
160 f->alignzones = (ALIGNZONE*)rfx_calloc(sizeof(ALIGNZONE)*f->numchars);
161 f->alignzone_flags = FONTALIGN_THIN;
165 for(t=0;t<f->numchars;t++) {
166 // just align the baseline
167 f->alignzones[t].x = 0xffff;
168 f->alignzones[t].y = 0;
169 f->alignzones[t].dx = 0xffff;
170 f->alignzones[t].dy = 0xffff;//floatToF16(460.80 / 1024.0);
174 for(t=0;t<f->numchars;t++) {
175 f->alignzones[t] = detect_for_char(f, t);
180 "-^_~\xad\xaf+`\xac\xb7\xf7" //chars for which to detect one y value
181 "#=:;\xb1" //chars for which to detect two y values
182 "\"\xa8" //chars for which to detect two x values
186 void swf_FontSetAlignZones(TAG*t, SWFFONT *f)
188 swf_SetU16(t, f->id);
189 swf_SetU8(t, f->alignzone_flags);
191 for(i=0;i<f->numchars;i++) {
192 ALIGNZONE*a = &f->alignzones[i];
194 if((a->x & a->dx)!=0xffff)
196 if((a->y & a->dy)!=0xffff)
199 if(a->dx != 0xffff || a->dy != 0xffff)
202 if(flags&1) swf_SetU16(t, a->x); else swf_SetU16(t, 0);
203 if(flags&2) swf_SetU16(t, a->y); else swf_SetU16(t, 0);
205 if((flags&1) && a->dx!=0xffff) swf_SetU16(t, a->dx); else swf_SetU16(t, 0);
206 if((flags&2) && a->dy!=0xffff) swf_SetU16(t, a->dy); else swf_SetU16(t, 0);