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_Shape01DrawerInit(drawer_t*draw, TAG*tag)
  61 {
  62     swf_ShapeDrawerInit(draw, tag, 1, 0);
  63 }
  64
  65 void swf_Shape11DrawerInit(drawer_t*draw, TAG*tag)
  66 {
  67     swf_ShapeDrawerInit(draw, tag, 1, 1);
  68 }
  69
  70 static void swf_ShapeDrawerSetLineStyle(drawer_t*draw, void*style)
  71 {
  72     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
  73 }
  74 static void swf_ShapeDrawerSetFillStyle(drawer_t*draw, void*style)
  75 {
  76     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
  77 }
  78 static void fixEndPoint(drawer_t*draw)
  79 {
  80     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
  81     if(   sdraw->firstx != sdraw->lastx
  82        || sdraw->firsty != sdraw->lasty) {
  83         /* fix non-closing shapes */
  84         /* TODO: do this only if the shape is filled */
  85         FPOINT to;
  86         to.x = sdraw->firstx/20.0;
  87         to.y = sdraw->firsty/20.0;
  88         draw->lineTo(draw, &to);
  89     }
  90 }
  91 static void swf_ShapeDrawerMoveTo(drawer_t*draw, FPOINT * to)
  92 {
  93     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
  94     int x = to->x*20;
  95     int y = to->y*20;
  96     if(sdraw->lastx != x || sdraw->lasty != y) {
  97         fixEndPoint(draw);
  98         swf_ShapeSetMove(sdraw->tag,sdraw->shape,x,y);
  99         sdraw->firstx = sdraw->lastx = x;
 100         sdraw->firsty = sdraw->lasty = y;
 101         draw->pos = *to;
 102     }
 103 }
 104 static void swf_ShapeDrawerLineTo(drawer_t*draw, FPOINT * to)
 105 {
 106     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 107     int x = to->x*20;
 108     int y = to->y*20;
 109     if(sdraw->lastx < sdraw->bbox.xmin) sdraw->bbox.xmin = sdraw->lastx;
 110     if(sdraw->lasty < sdraw->bbox.ymin) sdraw->bbox.ymin = sdraw->lasty;
 111     if(sdraw->lastx > sdraw->bbox.xmax) sdraw->bbox.xmax = sdraw->lastx;
 112     if(sdraw->lasty > sdraw->bbox.ymax) sdraw->bbox.ymax = sdraw->lasty;
 113     if(x < sdraw->bbox.xmin) sdraw->bbox.xmin = x;
 114     if(y < sdraw->bbox.ymin) sdraw->bbox.ymin = y;
 115     if(x > sdraw->bbox.xmax) sdraw->bbox.xmax = x;
 116     if(y > sdraw->bbox.ymax) sdraw->bbox.ymax = y;
 117     swf_ShapeSetLine(sdraw->tag,sdraw->shape,x-sdraw->lastx,y-sdraw->lasty);
 118     sdraw->lastx = x;
 119     sdraw->lasty = y;
 120     draw->pos = *to;
 121 }
 122 static void swf_ShapeDrawerSplineTo(drawer_t*draw, FPOINT * c1, FPOINT*  to)
 123 {
 124     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 125     int tx = c1->x*20;
 126     int ty = c1->y*20;
 127     int x = to->x*20;
 128     int y = to->y*20;
 129     if(sdraw->lastx < sdraw->bbox.xmin) sdraw->bbox.xmin = sdraw->lastx;
 130     if(sdraw->lasty < sdraw->bbox.ymin) sdraw->bbox.ymin = sdraw->lasty;
 131     if(sdraw->lastx > sdraw->bbox.xmax) sdraw->bbox.xmax = sdraw->lastx;
 132     if(sdraw->lasty > sdraw->bbox.ymax) sdraw->bbox.ymax = sdraw->lasty;
 133     if(x < sdraw->bbox.xmin) sdraw->bbox.xmin = x;
 134     if(y < sdraw->bbox.ymin) sdraw->bbox.ymin = y;
 135     if(x > sdraw->bbox.xmax) sdraw->bbox.xmax = x;
 136     if(y > sdraw->bbox.ymax) sdraw->bbox.ymax = y;
 137     if(tx < sdraw->bbox.xmin) sdraw->bbox.xmin = tx;
 138     if(ty < sdraw->bbox.ymin) sdraw->bbox.ymin = ty;
 139     if(tx > sdraw->bbox.xmax) sdraw->bbox.xmax = tx;
 140     if(ty > sdraw->bbox.ymax) sdraw->bbox.ymax = ty;
 141     swf_ShapeSetCurve(sdraw->tag,sdraw->shape, tx-sdraw->lastx,ty-sdraw->lasty, x-tx,y-ty);
 142     sdraw->lastx = x;
 143     sdraw->lasty = y;
 144     draw->pos = *to;
 145 }
 146 static void swf_ShapeDrawerFinish(drawer_t*draw)
 147 {
 148     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 149
 150     fixEndPoint(draw);
 151
 152     if(sdraw->bbox.xmin == SCOORD_MAX) {
 153         /* no points at all -> empty bounding box */
 154         sdraw->bbox.xmin = sdraw->bbox.ymin =
 155         sdraw->bbox.xmax = sdraw->bbox.ymax = 0;
 156     }
 157     sdraw->isfinished = 1;
 158     swf_ShapeSetEnd(sdraw->tag);
 159 }
 160
 161 static void swf_ShapeDrawerClear(drawer_t*draw)
 162 {
 163     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 164     if(sdraw->tagfree) {
 165         swf_DeleteTag(sdraw->tag);
 166         sdraw->tag = 0;
 167     }
 168     swf_ShapeFree(sdraw->shape);
 169     sdraw->shape = 0;
 170
 171     free(draw->internal);
 172     draw->internal = 0;
 173 }
 174
 175 SRECT swf_ShapeDrawerGetBBox(drawer_t*draw)
 176 {
 177     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 178     return sdraw->bbox;
 179 }
 180
 181 SHAPE* swf_ShapeDrawerToShape(drawer_t*draw)
 182 {
 183     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 184     SHAPE* shape = malloc(sizeof(SHAPE));
 185     if(!sdraw->isfinished) {
 186         fprintf(stderr, "Warning: you should Finish() your drawer before calling DrawerToShape");
 187         swf_ShapeDrawerFinish(draw);
 188     }
 189     memcpy(shape, sdraw->shape, sizeof(SHAPE));
 190     shape->bitlen = (sdraw->tag->len-1)*8;
 191     shape->data = (U8*)malloc(sdraw->tag->len-1);
 192     memcpy(shape->data, &sdraw->tag->data[1], sdraw->tag->len-1);
 193     return shape;
 194 }