lib/modules/swfdraw.c

   1 // swfdraw.c
   2
   3 typedef struct _SWFSHAPEDRAWER
   4 {
   5     SHAPE*shape;
   6     TAG*tag;
   7     int tagfree;
   8     SCOORD firstx;
   9     SCOORD firsty;
  10     SCOORD lastx;
  11     SCOORD lasty;
  12     SRECT bbox;
  13     char isfinished;
  14 } SWFSHAPEDRAWER;
  15
  16 static void swf_ShapeDrawerSetLineStyle(drawer_t*draw, void*style);
  17 static void swf_ShapeDrawerSetFillStyle(drawer_t*draw, void*style);
  18 static void swf_ShapeDrawerMoveTo(drawer_t*draw, FPOINT * to);
  19 static void swf_ShapeDrawerLineTo(drawer_t*draw, FPOINT * to);
  20 static void swf_ShapeDrawerSplineTo(drawer_t*draw, FPOINT * c1, FPOINT*  to);
  21 static void swf_ShapeDrawerFinish(drawer_t*draw);
  22 static void swf_ShapeDrawerClear(drawer_t*draw);
  23
  24 static void swf_ShapeDrawerInit(drawer_t*draw, TAG*tag, int fillstylebits, int linestylebits)
  25 {
  26     SWFSHAPEDRAWER*sdraw = malloc(sizeof(SWFSHAPEDRAWER));
  27     memset(sdraw, 0, sizeof(SWFSHAPEDRAWER));
  28     draw->internal = sdraw;
  29
  30     draw->setLineStyle = swf_ShapeDrawerSetLineStyle;
  31     draw->setFillStyle = swf_ShapeDrawerSetFillStyle;
  32     draw->moveTo = swf_ShapeDrawerMoveTo;
  33     draw->lineTo = swf_ShapeDrawerLineTo;
  34     draw->splineTo = swf_ShapeDrawerSplineTo;
  35     draw->finish = swf_ShapeDrawerFinish;
  36     draw->dealloc = swf_ShapeDrawerClear;
  37
  38     sdraw->tagfree = 0;
  39     if(tag == 0) {
  40         tag = swf_InsertTag(0, ST_DEFINESHAPE);
  41         sdraw->tagfree = 1;
  42     }
  43     sdraw->tag = tag;
  44     swf_ShapeNew(&sdraw->shape);
  45     draw->pos.x = 0;
  46     draw->pos.y = 0;
  47
  48     swf_SetU8(sdraw->tag,0);
  49     sdraw->shape->bits.fill = fillstylebits;
  50     sdraw->shape->bits.line = linestylebits;
  51
  52     sdraw->bbox.xmin = sdraw->bbox.ymin = SCOORD_MAX;
  53     sdraw->bbox.xmax = sdraw->bbox.ymax = SCOORD_MIN;
  54
  55     sdraw->isfinished = 0;
  56
  57     swf_ShapeSetStyle(sdraw->tag,sdraw->shape,linestylebits?1:0,fillstylebits?1:0,0/*?*/);
  58 }
  59
  60 void swf_Shape10DrawerInit(drawer_t*draw, TAG*tag)
  61 {
  62     swf_ShapeDrawerInit(draw, tag, 0, 1);
  63 }
  64
  65 void swf_Shape01DrawerInit(drawer_t*draw, TAG*tag)
  66 {
  67     swf_ShapeDrawerInit(draw, tag, 1, 0);
  68 }
  69
  70 void swf_Shape11DrawerInit(drawer_t*draw, TAG*tag)
  71 {
  72     swf_ShapeDrawerInit(draw, tag, 1, 1);
  73 }
  74
  75 static void swf_ShapeDrawerSetLineStyle(drawer_t*draw, void*style)
  76 {
  77     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
  78 }
  79 static void swf_ShapeDrawerSetFillStyle(drawer_t*draw, void*style)
  80 {
  81     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
  82 }
  83 static void fixEndPoint(drawer_t*draw)
  84 {
  85     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
  86     if(   sdraw->firstx != sdraw->lastx
  87        || sdraw->firsty != sdraw->lasty) {
  88         /* fix non-closing shapes */
  89         FPOINT to;
  90         to.x = sdraw->firstx/20.0;
  91         to.y = sdraw->firsty/20.0;
  92         if(sdraw->shape->bits.fill) // do this only if the shape is filled
  93             draw->lineTo(draw, &to);
  94     }
  95 }
  96 static void swf_ShapeDrawerMoveTo(drawer_t*draw, FPOINT * to)
  97 {
  98     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
  99     int x = to->x*20;
 100     int y = to->y*20;
 101
 102     /* we need to write moveto always- it
 103        might be that it signals the end of a polygon, otherwise
 104        we would end up connecting two polygons which should
 105        be seperate
 106         TODO: check if the last operation was a moveTo- if
 107               yes we *can* skip it.
 108      */
 109
 110     //if(sdraw->lastx != x || sdraw->lasty != y) {
 111         fixEndPoint(draw);
 112         swf_ShapeSetMove(sdraw->tag,sdraw->shape,x,y);
 113         sdraw->firstx = sdraw->lastx = x;
 114         sdraw->firsty = sdraw->lasty = y;
 115         draw->pos = *to;
 116     //}
 117 }
 118 static void swf_ShapeDrawerLineTo(drawer_t*draw, FPOINT * to)
 119 {
 120     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 121     int x = to->x*20;
 122     int y = to->y*20;
 123     if(sdraw->lastx < sdraw->bbox.xmin) sdraw->bbox.xmin = sdraw->lastx;
 124     if(sdraw->lasty < sdraw->bbox.ymin) sdraw->bbox.ymin = sdraw->lasty;
 125     if(sdraw->lastx > sdraw->bbox.xmax) sdraw->bbox.xmax = sdraw->lastx;
 126     if(sdraw->lasty > sdraw->bbox.ymax) sdraw->bbox.ymax = sdraw->lasty;
 127     if(x < sdraw->bbox.xmin) sdraw->bbox.xmin = x;
 128     if(y < sdraw->bbox.ymin) sdraw->bbox.ymin = y;
 129     if(x > sdraw->bbox.xmax) sdraw->bbox.xmax = x;
 130     if(y > sdraw->bbox.ymax) sdraw->bbox.ymax = y;
 131     swf_ShapeSetLine(sdraw->tag,sdraw->shape,x-sdraw->lastx,y-sdraw->lasty);
 132     sdraw->lastx = x;
 133     sdraw->lasty = y;
 134     draw->pos = *to;
 135 }
 136 static void swf_ShapeDrawerSplineTo(drawer_t*draw, FPOINT * c1, FPOINT*  to)
 137 {
 138     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 139     int tx = c1->x*20;
 140     int ty = c1->y*20;
 141     int x = to->x*20;
 142     int y = to->y*20;
 143     if(sdraw->lastx < sdraw->bbox.xmin) sdraw->bbox.xmin = sdraw->lastx;
 144     if(sdraw->lasty < sdraw->bbox.ymin) sdraw->bbox.ymin = sdraw->lasty;
 145     if(sdraw->lastx > sdraw->bbox.xmax) sdraw->bbox.xmax = sdraw->lastx;
 146     if(sdraw->lasty > sdraw->bbox.ymax) sdraw->bbox.ymax = sdraw->lasty;
 147     if(x < sdraw->bbox.xmin) sdraw->bbox.xmin = x;
 148     if(y < sdraw->bbox.ymin) sdraw->bbox.ymin = y;
 149     if(x > sdraw->bbox.xmax) sdraw->bbox.xmax = x;
 150     if(y > sdraw->bbox.ymax) sdraw->bbox.ymax = y;
 151     if(tx < sdraw->bbox.xmin) sdraw->bbox.xmin = tx;
 152     if(ty < sdraw->bbox.ymin) sdraw->bbox.ymin = ty;
 153     if(tx > sdraw->bbox.xmax) sdraw->bbox.xmax = tx;
 154     if(ty > sdraw->bbox.ymax) sdraw->bbox.ymax = ty;
 155     swf_ShapeSetCurve(sdraw->tag,sdraw->shape, tx-sdraw->lastx,ty-sdraw->lasty, x-tx,y-ty);
 156     sdraw->lastx = x;
 157     sdraw->lasty = y;
 158     draw->pos = *to;
 159 }
 160 static void swf_ShapeDrawerFinish(drawer_t*draw)
 161 {
 162     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 163     if(sdraw->isfinished)
 164         return;
 165
 166     fixEndPoint(draw);
 167
 168     if(sdraw->bbox.xmin == SCOORD_MAX) {
 169         /* no points at all -> empty bounding box */
 170         sdraw->bbox.xmin = sdraw->bbox.ymin =
 171         sdraw->bbox.xmax = sdraw->bbox.ymax = 0;
 172     }
 173     sdraw->isfinished = 1;
 174     swf_ShapeSetEnd(sdraw->tag);
 175 }
 176
 177 static void swf_ShapeDrawerClear(drawer_t*draw)
 178 {
 179     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 180     if(sdraw->tagfree) {
 181         swf_DeleteTag(sdraw->tag);
 182         sdraw->tag = 0;
 183     }
 184     swf_ShapeFree(sdraw->shape);
 185     sdraw->shape = 0;
 186
 187     free(draw->internal);
 188     draw->internal = 0;
 189 }
 190
 191 SRECT swf_ShapeDrawerGetBBox(drawer_t*draw)
 192 {
 193     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 194     return sdraw->bbox;
 195 }
 196
 197 SHAPE* swf_ShapeDrawerToShape(drawer_t*draw)
 198 {
 199     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 200     SHAPE* shape = malloc(sizeof(SHAPE));
 201     if(!sdraw->isfinished) {
 202         fprintf(stderr, "Warning: you should Finish() your drawer before calling DrawerToShape");
 203         swf_ShapeDrawerFinish(draw);
 204     }
 205     memcpy(shape, sdraw->shape, sizeof(SHAPE));
 206     shape->bitlen = (sdraw->tag->len-1)*8;
 207     shape->data = (U8*)malloc(sdraw->tag->len-1);
 208     memcpy(shape->data, &sdraw->tag->data[1], sdraw->tag->len-1);
 209     return shape;
 210 }