lib/modules/swfdraw.c

   1 #define SCOORD_MAX 0x7fffffff
   2 #define SCOORD_MIN -0x80000000
   3
   4 // swfdraw.c
   5 void swf_DrawerInit(SWFSHAPEDRAWER*draw, TAG*tag)
   6 {
   7     memset(draw, 0, sizeof(SWFSHAPEDRAWER));
   8     draw->tagfree = 0;
   9     if(tag == 0) {
  10         tag = swf_InsertTag(0, ST_DEFINESHAPE);
  11         draw->tagfree = 1;
  12     }
  13     draw->tag = tag;
  14     swf_ShapeNew(&draw->shape);
  15     draw->pos.x = 0;
  16     draw->pos.y = 0;
  17
  18     swf_SetU8(draw->tag,0);
  19     draw->shape->bits.fill = 1;
  20     draw->shape->bits.line = 1;
  21
  22     draw->bbox.xmin = draw->bbox.ymin = SCOORD_MAX;
  23     draw->bbox.xmax = draw->bbox.ymax = SCOORD_MIN;
  24
  25     draw->isfinished = 0;
  26
  27     swf_ShapeSetStyle(draw->tag,draw->shape,1,1,0);
  28 }
  29 void swf_DrawerMoveTo(SWFSHAPEDRAWER*draw, FPOINT * to)
  30 {
  31     int x = to->x*20;
  32     int y = to->y*20;
  33     swf_ShapeSetMove(draw->tag,draw->shape,x,y);
  34     draw->lastx = x;
  35     draw->lasty = y;
  36     draw->pos = *to;
  37 }
  38 void swf_DrawerLineTo(SWFSHAPEDRAWER*draw, FPOINT * to)
  39 {
  40     int x = to->x*20;
  41     int y = to->y*20;
  42     if(draw->lastx < draw->bbox.xmin) draw->bbox.xmin = draw->lastx;
  43     if(draw->lasty < draw->bbox.ymin) draw->bbox.ymin = draw->lasty;
  44     if(draw->lastx > draw->bbox.xmax) draw->bbox.xmax = draw->lastx;
  45     if(draw->lasty > draw->bbox.ymax) draw->bbox.ymax = draw->lasty;
  46     if(x < draw->bbox.xmin) draw->bbox.xmin = x;
  47     if(y < draw->bbox.ymin) draw->bbox.ymin = y;
  48     if(x > draw->bbox.xmax) draw->bbox.xmax = x;
  49     if(y > draw->bbox.ymax) draw->bbox.ymax = y;
  50     swf_ShapeSetLine(draw->tag,draw->shape,x-draw->lastx,y-draw->lasty);
  51     draw->lastx = x;
  52     draw->lasty = y;
  53     draw->pos = *to;
  54 }
  55 void swf_DrawerSplineTo(SWFSHAPEDRAWER*draw, FPOINT * c1, FPOINT*  to)
  56 {
  57     int tx = c1->x*20;
  58     int ty = c1->y*20;
  59     int x = to->x*20;
  60     int y = to->y*20;
  61     if(draw->lastx < draw->bbox.xmin) draw->bbox.xmin = draw->lastx;
  62     if(draw->lasty < draw->bbox.ymin) draw->bbox.ymin = draw->lasty;
  63     if(draw->lastx > draw->bbox.xmax) draw->bbox.xmax = draw->lastx;
  64     if(draw->lasty > draw->bbox.ymax) draw->bbox.ymax = draw->lasty;
  65     if(x < draw->bbox.xmin) draw->bbox.xmin = x;
  66     if(y < draw->bbox.ymin) draw->bbox.ymin = y;
  67     if(x > draw->bbox.xmax) draw->bbox.xmax = x;
  68     if(y > draw->bbox.ymax) draw->bbox.ymax = y;
  69     if(tx < draw->bbox.xmin) draw->bbox.xmin = tx;
  70     if(ty < draw->bbox.ymin) draw->bbox.ymin = ty;
  71     if(tx > draw->bbox.xmax) draw->bbox.xmax = tx;
  72     if(ty > draw->bbox.ymax) draw->bbox.ymax = ty;
  73     swf_ShapeSetCurve(draw->tag,draw->shape, tx-draw->lastx,ty-draw->lasty, x-tx,y-ty);
  74     draw->lastx = x;
  75     draw->lasty = y;
  76     draw->pos = *to;
  77 }
  78 void swf_DrawerCubicTo(SWFSHAPEDRAWER*draw, FPOINT*  c1, FPOINT* c2, FPOINT*  to)
  79 {
  80     /*TODO*/
  81     draw->pos = *to;
  82 }
  83 void swf_DrawerConicTo(SWFSHAPEDRAWER*draw, FPOINT* c, FPOINT*  to)
  84 {
  85     FPOINT* pos = &draw->pos;
  86     FPOINT c1,c2;
  87     c1.x = (pos->x + 2 * c->x) / 3;
  88     c1.y = (pos->y + 2 * c->y) / 3;
  89     c2.x = (2 * c->x + to->x) / 3;
  90     c2.y = (2 * c->y + to->y) / 3;
  91     swf_DrawerCubicTo(draw, &c1,&c2,to);
  92     draw->pos = *to;
  93 }
  94 void swf_DrawerFinish(SWFSHAPEDRAWER*draw)
  95 {
  96     if(draw->bbox.xmin == SCOORD_MAX) {
  97         /* no points at all -> empty bounding box */
  98         draw->bbox.xmin = draw->bbox.ymin =
  99         draw->bbox.xmax = draw->bbox.ymax = 0;
 100     }
 101     draw->isfinished = 1;
 102     swf_ShapeSetEnd(draw->tag);
 103 }
 104 SHAPE* swf_DrawerToShape(SWFSHAPEDRAWER*draw)
 105 {
 106     SHAPE* shape = malloc(sizeof(SHAPE));
 107     if(!draw->isfinished) {
 108         fprintf(stderr, "Warning: you should Finish() your drawer before calling DrawerToShape");
 109         swf_DrawerFinish(draw);
 110     }
 111     memcpy(shape, draw->shape, sizeof(SHAPE));
 112     shape->bitlen = (draw->tag->len-1)*8;
 113     shape->data = (U8*)malloc(draw->tag->len-1);
 114     memcpy(shape->data, &draw->tag->data[1], draw->tag->len-1);
 115     return shape;
 116 }
 117 void swf_DrawerFree(SWFSHAPEDRAWER*draw)
 118 {
 119     if(draw->tagfree) {
 120         swf_DeleteTag(draw->tag);
 121         draw->tag = 0;
 122     }
 123 //    swf_ShapeFree(draw->s);
 124  //   draw->s = 0;
 125 }
 126
 127 static char* getToken(const char**p)
 128 {
 129     const char*start;
 130     char*result;
 131     while(**p && strchr(" ,\t\n\r", **p)) {
 132         (*p)++;
 133     }
 134     start = *p;
 135     while(**p && !strchr(" ,\t\n\r", **p)) {
 136         (*p)++;
 137     }
 138     result = malloc((*p)-start+1);
 139     memcpy(result,start,(*p)-start+1);
 140     result[(*p)-start] = 0;
 141     return result;
 142 }
 143
 144 void swf_DrawString(SWFSHAPEDRAWER*draw, const char*string)
 145 {
 146     const char*p = string;
 147     while(*p) {
 148         char*token = getToken(&p);
 149         if(!strncmp(token, "moveTo", 6)) {
 150             FPOINT to;
 151             to.x = atoi(getToken(&p));
 152             to.y = atoi(getToken(&p));
 153             swf_DrawerMoveTo(draw, &to);
 154         }
 155         else if(!strncmp(token, "lineTo", 6)) {
 156             FPOINT to;
 157             to.x = atoi(getToken(&p));
 158             to.y = atoi(getToken(&p));
 159             swf_DrawerLineTo(draw, &to);
 160         }
 161         else if(!strncmp(token, "curveTo", 7) || !strncmp(token, "splineTo", 8)) {
 162             FPOINT mid,to;
 163             mid.x = atoi(getToken(&p));
 164             mid.y = atoi(getToken(&p));
 165             to.x = atoi(getToken(&p));
 166             to.y = atoi(getToken(&p));
 167             swf_DrawerSplineTo(draw, &mid, &to);
 168         }
 169         free(token);
 170     }
 171     //swf_DrawerFinish(draw); // must be done by application.
 172 }