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 = rfx_calloc(sizeof(SWFSHAPEDRAWER));
  27     draw->internal = sdraw;
  28
  29     draw->setLineStyle = swf_ShapeDrawerSetLineStyle;
  30     draw->setFillStyle = swf_ShapeDrawerSetFillStyle;
  31     draw->moveTo = swf_ShapeDrawerMoveTo;
  32     draw->lineTo = swf_ShapeDrawerLineTo;
  33     draw->splineTo = swf_ShapeDrawerSplineTo;
  34     draw->finish = swf_ShapeDrawerFinish;
  35     draw->dealloc = swf_ShapeDrawerClear;
  36
  37     sdraw->tagfree = 0;
  38     if(tag == 0) {
  39         tag = swf_InsertTag(0, ST_DEFINESHAPE);
  40         sdraw->tagfree = 1;
  41     }
  42     sdraw->tag = tag;
  43     swf_ShapeNew(&sdraw->shape);
  44     draw->pos.x = 0;
  45     draw->pos.y = 0;
  46
  47     swf_SetU8(sdraw->tag,0);
  48     sdraw->shape->bits.fill = fillstylebits;
  49     sdraw->shape->bits.line = linestylebits;
  50
  51     sdraw->bbox.xmin = sdraw->bbox.ymin = SCOORD_MAX;
  52     sdraw->bbox.xmax = sdraw->bbox.ymax = SCOORD_MIN;
  53
  54     sdraw->isfinished = 0;
  55
  56     swf_ShapeSetStyle(sdraw->tag,sdraw->shape,linestylebits?1:0,fillstylebits?1:0,0/*?*/);
  57 }
  58
  59 void swf_Shape10DrawerInit(drawer_t*draw, TAG*tag)
  60 {
  61     swf_ShapeDrawerInit(draw, tag, 0, 1);
  62 }
  63
  64 void swf_Shape01DrawerInit(drawer_t*draw, TAG*tag)
  65 {
  66     swf_ShapeDrawerInit(draw, tag, 1, 0);
  67 }
  68
  69 void swf_Shape11DrawerInit(drawer_t*draw, TAG*tag)
  70 {
  71     swf_ShapeDrawerInit(draw, tag, 1, 1);
  72 }
  73
  74 static void swf_ShapeDrawerSetLineStyle(drawer_t*draw, void*style)
  75 {
  76     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
  77 }
  78 static void swf_ShapeDrawerSetFillStyle(drawer_t*draw, void*style)
  79 {
  80     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
  81 }
  82 static void fixEndPoint(drawer_t*draw)
  83 {
  84     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
  85     if(   sdraw->firstx != sdraw->lastx
  86        || sdraw->firsty != sdraw->lasty) {
  87         /* fix non-closing shapes */
  88         FPOINT to;
  89         to.x = sdraw->firstx/20.0;
  90         to.y = sdraw->firsty/20.0;
  91         if(sdraw->shape->bits.fill) // do this only if the shape is filled
  92             draw->lineTo(draw, &to);
  93     }
  94 }
  95 static void swf_ShapeDrawerMoveTo(drawer_t*draw, FPOINT * to)
  96 {
  97     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
  98     int x = to->x*20+0.001;
  99     int y = to->y*20+0.001;
 100
 101     /* we need to write moveto always- it
 102        might be that it signals the end of a polygon, otherwise
 103        we would end up connecting two polygons which should
 104        be seperate
 105         TODO: check if the last operation was a moveTo- if
 106               yes we *can* skip it.
 107      */
 108
 109     //if(sdraw->lastx != x || sdraw->lasty != y) {
 110         fixEndPoint(draw);
 111         swf_ShapeSetMove(sdraw->tag,sdraw->shape,x,y);
 112         sdraw->firstx = sdraw->lastx = x;
 113         sdraw->firsty = sdraw->lasty = y;
 114         draw->pos = *to;
 115     //}
 116 }
 117 static void swf_ShapeDrawerLineTo(drawer_t*draw, FPOINT * to)
 118 {
 119     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 120     int x = to->x*20+0.001;
 121     int y = to->y*20+0.001;
 122     if(sdraw->lastx < sdraw->bbox.xmin) sdraw->bbox.xmin = sdraw->lastx;
 123     if(sdraw->lasty < sdraw->bbox.ymin) sdraw->bbox.ymin = sdraw->lasty;
 124     if(sdraw->lastx > sdraw->bbox.xmax) sdraw->bbox.xmax = sdraw->lastx;
 125     if(sdraw->lasty > sdraw->bbox.ymax) sdraw->bbox.ymax = sdraw->lasty;
 126     if(x < sdraw->bbox.xmin) sdraw->bbox.xmin = x;
 127     if(y < sdraw->bbox.ymin) sdraw->bbox.ymin = y;
 128     if(x > sdraw->bbox.xmax) sdraw->bbox.xmax = x;
 129     if(y > sdraw->bbox.ymax) sdraw->bbox.ymax = y;
 130     swf_ShapeSetLine(sdraw->tag,sdraw->shape,x-sdraw->lastx,y-sdraw->lasty);
 131     sdraw->lastx = x;
 132     sdraw->lasty = y;
 133     draw->pos = *to;
 134 }
 135 static void swf_ShapeDrawerSplineTo(drawer_t*draw, FPOINT * c1, FPOINT*  to)
 136 {
 137     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 138     int tx = c1->x*20+0.001;
 139     int ty = c1->y*20+0.001;
 140     int x = to->x*20+0.001;
 141     int y = to->y*20+0.001;
 142     if(sdraw->lastx < sdraw->bbox.xmin) sdraw->bbox.xmin = sdraw->lastx;
 143     if(sdraw->lasty < sdraw->bbox.ymin) sdraw->bbox.ymin = sdraw->lasty;
 144     if(sdraw->lastx > sdraw->bbox.xmax) sdraw->bbox.xmax = sdraw->lastx;
 145     if(sdraw->lasty > sdraw->bbox.ymax) sdraw->bbox.ymax = sdraw->lasty;
 146     if(x < sdraw->bbox.xmin) sdraw->bbox.xmin = x;
 147     if(y < sdraw->bbox.ymin) sdraw->bbox.ymin = y;
 148     if(x > sdraw->bbox.xmax) sdraw->bbox.xmax = x;
 149     if(y > sdraw->bbox.ymax) sdraw->bbox.ymax = y;
 150     if(tx < sdraw->bbox.xmin) sdraw->bbox.xmin = tx;
 151     if(ty < sdraw->bbox.ymin) sdraw->bbox.ymin = ty;
 152     if(tx > sdraw->bbox.xmax) sdraw->bbox.xmax = tx;
 153     if(ty > sdraw->bbox.ymax) sdraw->bbox.ymax = ty;
 154     swf_ShapeSetCurve(sdraw->tag,sdraw->shape, tx-sdraw->lastx,ty-sdraw->lasty, x-tx,y-ty);
 155     sdraw->lastx = x;
 156     sdraw->lasty = y;
 157     draw->pos = *to;
 158 }
 159 static void swf_ShapeDrawerFinish(drawer_t*draw)
 160 {
 161     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 162     if(sdraw->isfinished)
 163         return;
 164
 165     fixEndPoint(draw);
 166
 167     if(sdraw->bbox.xmin == SCOORD_MAX) {
 168         /* no points at all -> empty bounding box */
 169         sdraw->bbox.xmin = sdraw->bbox.ymin =
 170         sdraw->bbox.xmax = sdraw->bbox.ymax = 0;
 171     }
 172     sdraw->isfinished = 1;
 173     swf_ShapeSetEnd(sdraw->tag);
 174 }
 175
 176 static void swf_ShapeDrawerClear(drawer_t*draw)
 177 {
 178     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 179     if(sdraw->tagfree) {
 180         swf_DeleteTag(sdraw->tag);
 181         sdraw->tag = 0;
 182     }
 183     swf_ShapeFree(sdraw->shape);
 184     sdraw->shape = 0;
 185
 186     rfx_free(draw->internal);
 187     draw->internal = 0;
 188 }
 189
 190 SRECT swf_ShapeDrawerGetBBox(drawer_t*draw)
 191 {
 192     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 193     return sdraw->bbox;
 194 }
 195
 196 SHAPE* swf_ShapeDrawerToShape(drawer_t*draw)
 197 {
 198     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 199     SHAPE* shape = rfx_alloc(sizeof(SHAPE));
 200     if(!sdraw->isfinished) {
 201         fprintf(stderr, "Warning: you should Finish() your drawer before calling DrawerToShape");
 202         swf_ShapeDrawerFinish(draw);
 203     }
 204     memcpy(shape, sdraw->shape, sizeof(SHAPE));
 205     shape->bitlen = (sdraw->tag->len-1)*8;
 206     shape->data = (U8*)rfx_alloc(sdraw->tag->len-1);
 207     memcpy(shape->data, &sdraw->tag->data[1], sdraw->tag->len-1);
 208     return shape;
 209 }