diff options
Diffstat (limited to 'fitz/res_shade.c')
| -rw-r--r-- | fitz/res_shade.c | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/fitz/res_shade.c b/fitz/res_shade.c index 2ddd6275..5fc23372 100644 --- a/fitz/res_shade.c +++ b/fitz/res_shade.c @@ -22,8 +22,39 @@ fz_dropshade(fz_shade *shade) fz_rect fz_boundshade(fz_shade *shade, fz_matrix ctm) { + float *v; + fz_rect r; + fz_point p; + int i, ncomp, nvert; + ctm = fz_concat(shade->matrix, ctm); - return fz_transformrect(ctm, shade->bbox); + ncomp = shade->usefunction ? 3 : 2 + shade->cs->n; + nvert = shade->meshlen / ncomp; + v = shade->mesh; + + if (nvert == 0) + return fz_emptyrect; + + p.x = v[0]; + p.y = v[1]; + v += ncomp; + p = fz_transformpoint(ctm, p); + r.x0 = r.x1 = p.x; + r.y0 = r.y1 = p.y; + + for (i = 1; i < nvert; i++) + { + p.x = v[0]; + p.y = v[1]; + p = fz_transformpoint(ctm, p); + v += ncomp; + if (p.x < r.x0) r.x0 = p.x; + if (p.y < r.y0) r.y0 = p.y; + if (p.x > r.x1) r.x1 = p.x; + if (p.y > r.y1) r.y1 = p.y; + } + + return r; } void |