diff options
Diffstat (limited to 'lib/gfxtools.c')
| -rw-r--r-- | lib/gfxtools.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/lib/gfxtools.c b/lib/gfxtools.c index e79e6fef..8ee2ff48 100644 --- a/lib/gfxtools.c +++ b/lib/gfxtools.c @@ -834,6 +834,37 @@ gfxline_t*gfxline_makerectangle(int x1,int y1,int x2, int y2) return line; } +gfxline_t*gfxline_makecircle(double x,double y,double rx, double ry) +{ + double C1 = 0.2930; + double C2 = 0.4140; + double begin = 0.7070; + gfxline_t* line = (gfxline_t*)rfx_calloc(sizeof(gfxline_t)*9); + int t; + line[0].type = gfx_moveTo; + line[0].x = x+begin*rx; + line[0].y = y+begin*ry; + for(t=1;t<9;t++) { + line[t-1].next = &line[t]; + line[t].type = gfx_splineTo; + } + line[t].next = 0; +#define R(nr,cx,cy,mx,my) \ + line[nr].sx = line[nr-1].x + (cx); \ + line[nr].sy = line[nr-1].y + (cy); \ + line[nr].x = line[nr].sx + (mx); \ + line[nr].y = line[nr].sy + (my); + R(1, -C1*rx, C1*ry, -C2*rx, 0); + R(2, -C2*rx, 0, -C1*rx, -C1*ry); + R(3, -C1*rx, -C1*ry, 0, -C2*ry); + R(4, 0, -C2*ry, C1*rx, -C1*ry); + R(5, C1*rx, -C1*ry, C2*rx, 0); + R(6, C2*rx, 0, C1*rx, C1*ry); + R(7, C1*rx, C1*ry, 0, C2*ry); + R(8, 0, C2*ry, -C1*rx, C1*ry); + return line; +} + gfxbbox_t* gfxline_isrectangle(gfxline_t*_l) { if(!_l) |