lib/modules/swfdraw.c

   1 // swfdraw.c
   2
   3 typedef struct _SWFSHAPEDRAWER
   4 {
   5     SHAPE*shape;
   6     TAG*tag;
   7     int tagfree;
   8     SCOORD lastx;
   9     SCOORD lasty;
  10     SRECT bbox;
  11     char isfinished;
  12 } SWFSHAPEDRAWER;
  13
  14 static void swf_ShapeDrawerSetLineStyle(drawer_t*draw, void*style);
  15 static void swf_ShapeDrawerSetFillStyle(drawer_t*draw, void*style);
  16 static void swf_ShapeDrawerMoveTo(drawer_t*draw, FPOINT * to);
  17 static void swf_ShapeDrawerLineTo(drawer_t*draw, FPOINT * to);
  18 static void swf_ShapeDrawerSplineTo(drawer_t*draw, FPOINT * c1, FPOINT*  to);
  19 static void swf_ShapeDrawerFinish(drawer_t*draw);
  20 static void swf_ShapeDrawerClear(drawer_t*draw);
  21
  22 static void swf_ShapeDrawerInit(drawer_t*draw, TAG*tag, int fillstylebits, int linestylebits)
  23 {
  24     SWFSHAPEDRAWER*sdraw = malloc(sizeof(SWFSHAPEDRAWER));
  25     memset(sdraw, 0, sizeof(SWFSHAPEDRAWER));
  26     draw->internal = sdraw;
  27
  28     draw->setLineStyle = swf_ShapeDrawerSetLineStyle;
  29     draw->setFillStyle = swf_ShapeDrawerSetFillStyle;
  30     draw->moveTo = swf_ShapeDrawerMoveTo;
  31     draw->lineTo = swf_ShapeDrawerLineTo;
  32     draw->splineTo = swf_ShapeDrawerSplineTo;
  33     draw->finish = swf_ShapeDrawerFinish;
  34     draw->dealloc = swf_ShapeDrawerClear;
  35
  36     sdraw->tagfree = 0;
  37     if(tag == 0) {
  38         tag = swf_InsertTag(0, ST_DEFINESHAPE);
  39         sdraw->tagfree = 1;
  40     }
  41     sdraw->tag = tag;
  42     swf_ShapeNew(&sdraw->shape);
  43     draw->pos.x = 0;
  44     draw->pos.y = 0;
  45
  46     swf_SetU8(sdraw->tag,0);
  47     sdraw->shape->bits.fill = fillstylebits;
  48     sdraw->shape->bits.line = linestylebits;
  49
  50     sdraw->bbox.xmin = sdraw->bbox.ymin = SCOORD_MAX;
  51     sdraw->bbox.xmax = sdraw->bbox.ymax = SCOORD_MIN;
  52
  53     sdraw->isfinished = 0;
  54
  55     swf_ShapeSetStyle(sdraw->tag,sdraw->shape,linestylebits?1:0,fillstylebits?1:0,0/*?*/);
  56 }
  57
  58 void swf_Shape01DrawerInit(drawer_t*draw, TAG*tag)
  59 {
  60     swf_ShapeDrawerInit(draw, tag, 1, 0);
  61 }
  62
  63 void swf_Shape11DrawerInit(drawer_t*draw, TAG*tag)
  64 {
  65     swf_ShapeDrawerInit(draw, tag, 1, 1);
  66 }
  67
  68 static void swf_ShapeDrawerSetLineStyle(drawer_t*draw, void*style)
  69 {
  70     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
  71 }
  72 static void swf_ShapeDrawerSetFillStyle(drawer_t*draw, void*style)
  73 {
  74     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
  75 }
  76 static void swf_ShapeDrawerMoveTo(drawer_t*draw, FPOINT * to)
  77 {
  78     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
  79     int x = to->x*20;
  80     int y = to->y*20;
  81     swf_ShapeSetMove(sdraw->tag,sdraw->shape,x,y);
  82     sdraw->lastx = x;
  83     sdraw->lasty = y;
  84     draw->pos = *to;
  85 }
  86 static void swf_ShapeDrawerLineTo(drawer_t*draw, FPOINT * to)
  87 {
  88     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
  89     int x = to->x*20;
  90     int y = to->y*20;
  91     if(sdraw->lastx < sdraw->bbox.xmin) sdraw->bbox.xmin = sdraw->lastx;
  92     if(sdraw->lasty < sdraw->bbox.ymin) sdraw->bbox.ymin = sdraw->lasty;
  93     if(sdraw->lastx > sdraw->bbox.xmax) sdraw->bbox.xmax = sdraw->lastx;
  94     if(sdraw->lasty > sdraw->bbox.ymax) sdraw->bbox.ymax = sdraw->lasty;
  95     if(x < sdraw->bbox.xmin) sdraw->bbox.xmin = x;
  96     if(y < sdraw->bbox.ymin) sdraw->bbox.ymin = y;
  97     if(x > sdraw->bbox.xmax) sdraw->bbox.xmax = x;
  98     if(y > sdraw->bbox.ymax) sdraw->bbox.ymax = y;
  99     swf_ShapeSetLine(sdraw->tag,sdraw->shape,x-sdraw->lastx,y-sdraw->lasty);
 100     sdraw->lastx = x;
 101     sdraw->lasty = y;
 102     draw->pos = *to;
 103 }
 104 static void swf_ShapeDrawerSplineTo(drawer_t*draw, FPOINT * c1, FPOINT*  to)
 105 {
 106     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 107     int tx = c1->x*20;
 108     int ty = c1->y*20;
 109     int x = to->x*20;
 110     int y = to->y*20;
 111     if(sdraw->lastx < sdraw->bbox.xmin) sdraw->bbox.xmin = sdraw->lastx;
 112     if(sdraw->lasty < sdraw->bbox.ymin) sdraw->bbox.ymin = sdraw->lasty;
 113     if(sdraw->lastx > sdraw->bbox.xmax) sdraw->bbox.xmax = sdraw->lastx;
 114     if(sdraw->lasty > sdraw->bbox.ymax) sdraw->bbox.ymax = sdraw->lasty;
 115     if(x < sdraw->bbox.xmin) sdraw->bbox.xmin = x;
 116     if(y < sdraw->bbox.ymin) sdraw->bbox.ymin = y;
 117     if(x > sdraw->bbox.xmax) sdraw->bbox.xmax = x;
 118     if(y > sdraw->bbox.ymax) sdraw->bbox.ymax = y;
 119     if(tx < sdraw->bbox.xmin) sdraw->bbox.xmin = tx;
 120     if(ty < sdraw->bbox.ymin) sdraw->bbox.ymin = ty;
 121     if(tx > sdraw->bbox.xmax) sdraw->bbox.xmax = tx;
 122     if(ty > sdraw->bbox.ymax) sdraw->bbox.ymax = ty;
 123     swf_ShapeSetCurve(sdraw->tag,sdraw->shape, tx-sdraw->lastx,ty-sdraw->lasty, x-tx,y-ty);
 124     sdraw->lastx = x;
 125     sdraw->lasty = y;
 126     draw->pos = *to;
 127 }
 128 static void swf_ShapeDrawerFinish(drawer_t*draw)
 129 {
 130     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 131     if(sdraw->bbox.xmin == SCOORD_MAX) {
 132         /* no points at all -> empty bounding box */
 133         sdraw->bbox.xmin = sdraw->bbox.ymin =
 134         sdraw->bbox.xmax = sdraw->bbox.ymax = 0;
 135     }
 136     sdraw->isfinished = 1;
 137     swf_ShapeSetEnd(sdraw->tag);
 138 }
 139
 140 static void swf_ShapeDrawerClear(drawer_t*draw)
 141 {
 142     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 143     if(sdraw->tagfree) {
 144         swf_DeleteTag(sdraw->tag);
 145         sdraw->tag = 0;
 146     }
 147     swf_ShapeFree(sdraw->shape);
 148     sdraw->shape = 0;
 149
 150     free(draw->internal);
 151     draw->internal = 0;
 152 }
 153
 154 SRECT swf_ShapeDrawerGetBBox(drawer_t*draw)
 155 {
 156     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 157     return sdraw->bbox;
 158 }
 159
 160 SHAPE* swf_ShapeDrawerToShape(drawer_t*draw)
 161 {
 162     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 163     SHAPE* shape = malloc(sizeof(SHAPE));
 164     if(!sdraw->isfinished) {
 165         fprintf(stderr, "Warning: you should Finish() your drawer before calling DrawerToShape");
 166         swf_ShapeDrawerFinish(draw);
 167     }
 168     memcpy(shape, sdraw->shape, sizeof(SHAPE));
 169     shape->bitlen = (sdraw->tag->len-1)*8;
 170     shape->data = (U8*)malloc(sdraw->tag->len-1);
 171     memcpy(shape->data, &sdraw->tag->data[1], sdraw->tag->len-1);
 172     return shape;
 173 }