lib/modules/swfdraw.c

   1 // swfdraw.c
   2
   3 #include "../rfxswf.h"
   4
   5 typedef struct _SWFSHAPEDRAWER
   6 {
   7     SHAPE*shape;
   8     TAG*tag;
   9     int tagfree;
  10     SCOORD firstx;
  11     SCOORD firsty;
  12     SCOORD lastx;
  13     SCOORD lasty;
  14     SRECT bbox;
  15     char isfinished;
  16 } SWFSHAPEDRAWER;
  17
  18 static void swf_ShapeDrawerSetLineStyle(drawer_t*draw, void*style);
  19 static void swf_ShapeDrawerSetFillStyle(drawer_t*draw, void*style);
  20 static void swf_ShapeDrawerMoveTo(drawer_t*draw, FPOINT * to);
  21 static void swf_ShapeDrawerLineTo(drawer_t*draw, FPOINT * to);
  22 static void swf_ShapeDrawerSplineTo(drawer_t*draw, FPOINT * c1, FPOINT*  to);
  23 static void swf_ShapeDrawerFinish(drawer_t*draw);
  24 static void swf_ShapeDrawerClear(drawer_t*draw);
  25
  26 static void swf_ShapeDrawerInit(drawer_t*draw, TAG*tag, int fillstylebits, int linestylebits)
  27 {
  28     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)rfx_calloc(sizeof(SWFSHAPEDRAWER));
  29     draw->internal = sdraw;
  30
  31     draw->setLineStyle = swf_ShapeDrawerSetLineStyle;
  32     draw->setFillStyle = swf_ShapeDrawerSetFillStyle;
  33     draw->moveTo = swf_ShapeDrawerMoveTo;
  34     draw->lineTo = swf_ShapeDrawerLineTo;
  35     draw->splineTo = swf_ShapeDrawerSplineTo;
  36     draw->finish = swf_ShapeDrawerFinish;
  37     draw->dealloc = swf_ShapeDrawerClear;
  38
  39     sdraw->tagfree = 0;
  40     if(tag == 0) {
  41         tag = swf_InsertTag(0, ST_DEFINESHAPE);
  42         sdraw->tagfree = 1;
  43     }
  44     sdraw->tag = tag;
  45     swf_ShapeNew(&sdraw->shape);
  46     draw->pos.x = 0;
  47     draw->pos.y = 0;
  48
  49     swf_SetU8(sdraw->tag,0);
  50     sdraw->shape->bits.fill = fillstylebits;
  51     sdraw->shape->bits.line = linestylebits;
  52
  53     sdraw->bbox.xmin = sdraw->bbox.ymin = SCOORD_MAX;
  54     sdraw->bbox.xmax = sdraw->bbox.ymax = SCOORD_MIN;
  55
  56     sdraw->isfinished = 0;
  57
  58     swf_ShapeSetStyle(sdraw->tag,sdraw->shape,linestylebits?1:0,fillstylebits?1:0,0/*?*/);
  59 }
  60
  61 void swf_Shape10DrawerInit(drawer_t*draw, TAG*tag)
  62 {
  63     swf_ShapeDrawerInit(draw, tag, 0, 1);
  64 }
  65
  66 void swf_Shape01DrawerInit(drawer_t*draw, TAG*tag)
  67 {
  68     swf_ShapeDrawerInit(draw, tag, 1, 0);
  69 }
  70
  71 void swf_Shape11DrawerInit(drawer_t*draw, TAG*tag)
  72 {
  73     swf_ShapeDrawerInit(draw, tag, 1, 1);
  74 }
  75
  76 static void swf_ShapeDrawerSetLineStyle(drawer_t*draw, void*style)
  77 {
  78     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
  79 }
  80 static void swf_ShapeDrawerSetFillStyle(drawer_t*draw, void*style)
  81 {
  82     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
  83 }
  84 static void fixEndPoint(drawer_t*draw)
  85 {
  86     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
  87     if(   sdraw->firstx != sdraw->lastx
  88        || sdraw->firsty != sdraw->lasty) {
  89         /* fix non-closing shapes */
  90         FPOINT to;
  91         to.x = sdraw->firstx/20.0;
  92         to.y = sdraw->firsty/20.0;
  93         if(sdraw->shape->bits.fill) // do this only if the shape is filled
  94             draw->lineTo(draw, &to);
  95     }
  96 }
  97 static void swf_ShapeDrawerMoveTo(drawer_t*draw, FPOINT * to)
  98 {
  99     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 100     int x = floor(to->x*20);
 101     int y = floor(to->y*20);
 102
 103     /* we need to write moveto always- it
 104        might be that it signals the end of a polygon, otherwise
 105        we would end up connecting two polygons which should
 106        be seperate
 107         TODO: check if the last operation was a moveTo- if
 108               yes we *can* skip it.
 109      */
 110
 111     //if(sdraw->lastx != x || sdraw->lasty != y) {
 112         fixEndPoint(draw);
 113         swf_ShapeSetMove(sdraw->tag,sdraw->shape,x,y);
 114         sdraw->firstx = sdraw->lastx = x;
 115         sdraw->firsty = sdraw->lasty = y;
 116         draw->pos = *to;
 117     //}
 118 }
 119 static void swf_ShapeDrawerLineTo(drawer_t*draw, FPOINT * to)
 120 {
 121     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 122     int x = floor(to->x*20);
 123     int y = floor(to->y*20);
 124     if(sdraw->lastx < sdraw->bbox.xmin) sdraw->bbox.xmin = sdraw->lastx;
 125     if(sdraw->lasty < sdraw->bbox.ymin) sdraw->bbox.ymin = sdraw->lasty;
 126     if(sdraw->lastx > sdraw->bbox.xmax) sdraw->bbox.xmax = sdraw->lastx;
 127     if(sdraw->lasty > sdraw->bbox.ymax) sdraw->bbox.ymax = sdraw->lasty;
 128     if(x < sdraw->bbox.xmin) sdraw->bbox.xmin = x;
 129     if(y < sdraw->bbox.ymin) sdraw->bbox.ymin = y;
 130     if(x > sdraw->bbox.xmax) sdraw->bbox.xmax = x;
 131     if(y > sdraw->bbox.ymax) sdraw->bbox.ymax = y;
 132     swf_ShapeSetLine(sdraw->tag,sdraw->shape,x-sdraw->lastx,y-sdraw->lasty);
 133     sdraw->lastx = x;
 134     sdraw->lasty = y;
 135     draw->pos = *to;
 136 }
 137 static void swf_ShapeDrawerSplineTo(drawer_t*draw, FPOINT * c1, FPOINT*  to)
 138 {
 139     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 140     int tx = floor(c1->x*20);
 141     int ty = floor(c1->y*20);
 142     int x = floor(to->x*20);
 143     int y = floor(to->y*20);
 144     if(sdraw->lastx < sdraw->bbox.xmin) sdraw->bbox.xmin = sdraw->lastx;
 145     if(sdraw->lasty < sdraw->bbox.ymin) sdraw->bbox.ymin = sdraw->lasty;
 146     if(sdraw->lastx > sdraw->bbox.xmax) sdraw->bbox.xmax = sdraw->lastx;
 147     if(sdraw->lasty > sdraw->bbox.ymax) sdraw->bbox.ymax = sdraw->lasty;
 148     if(x < sdraw->bbox.xmin) sdraw->bbox.xmin = x;
 149     if(y < sdraw->bbox.ymin) sdraw->bbox.ymin = y;
 150     if(x > sdraw->bbox.xmax) sdraw->bbox.xmax = x;
 151     if(y > sdraw->bbox.ymax) sdraw->bbox.ymax = y;
 152     if(tx < sdraw->bbox.xmin) sdraw->bbox.xmin = tx;
 153     if(ty < sdraw->bbox.ymin) sdraw->bbox.ymin = ty;
 154     if(tx > sdraw->bbox.xmax) sdraw->bbox.xmax = tx;
 155     if(ty > sdraw->bbox.ymax) sdraw->bbox.ymax = ty;
 156     swf_ShapeSetCurve(sdraw->tag,sdraw->shape, tx-sdraw->lastx,ty-sdraw->lasty, x-tx,y-ty);
 157     sdraw->lastx = x;
 158     sdraw->lasty = y;
 159     draw->pos = *to;
 160 }
 161 static void swf_ShapeDrawerFinish(drawer_t*draw)
 162 {
 163     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 164     if(sdraw->isfinished)
 165         return;
 166
 167     fixEndPoint(draw);
 168
 169     if(sdraw->bbox.xmin == SCOORD_MAX) {
 170         /* no points at all -> empty bounding box */
 171         sdraw->bbox.xmin = sdraw->bbox.ymin =
 172         sdraw->bbox.xmax = sdraw->bbox.ymax = 0;
 173     }
 174     sdraw->isfinished = 1;
 175     swf_ShapeSetEnd(sdraw->tag);
 176 }
 177
 178 static void swf_ShapeDrawerClear(drawer_t*draw)
 179 {
 180     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 181     if(sdraw->tagfree) {
 182         swf_DeleteTag(0, sdraw->tag);
 183         sdraw->tag = 0;
 184     }
 185     swf_ShapeFree(sdraw->shape);
 186     sdraw->shape = 0;
 187
 188     rfx_free(draw->internal);
 189     draw->internal = 0;
 190 }
 191
 192 SRECT swf_ShapeDrawerGetBBox(drawer_t*draw)
 193 {
 194     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 195     return sdraw->bbox;
 196 }
 197
 198 SHAPE* swf_ShapeDrawerToShape(drawer_t*draw)
 199 {
 200     SWFSHAPEDRAWER*sdraw = (SWFSHAPEDRAWER*)draw->internal;
 201     SHAPE* shape = (SHAPE*)rfx_alloc(sizeof(SHAPE));
 202     if(!sdraw->isfinished) {
 203         fprintf(stderr, "Warning: you should Finish() your drawer before calling DrawerToShape");
 204         swf_ShapeDrawerFinish(draw);
 205     }
 206     memcpy(shape, sdraw->shape, sizeof(SHAPE));
 207     shape->bitlen = (sdraw->tag->len-1)*8;
 208     shape->data = (U8*)rfx_alloc(sdraw->tag->len-1);
 209     memcpy(shape->data, &sdraw->tag->data[1], sdraw->tag->len-1);
 210     return shape;
 211 }