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pdf: fix smask gradient bbox

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This commit is contained in:
Adrian Johnson 2012-05-27 11:53:43 +09:30
parent 29a42ae682
commit fcfa45c9f7
1 changed files with 26 additions and 3 deletions
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29
src/cairo-pdf-surface.c
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@ -3442,6 +3442,7 @@ cairo_pdf_surface_emit_transparency_group (cairo_pdf_surface_t *surface,
cairo_pdf_resource_t smask_resource;
cairo_status_t status;
char buf[100];
double x1, y1, x2, y2;
if (pdf_pattern->is_shading) {
snprintf(buf, sizeof(buf),
@ -3457,13 +3458,36 @@ cairo_pdf_surface_emit_transparency_group (cairo_pdf_surface_t *surface,
gradient_mask.id);
}
if (pdf_pattern->is_shading) {
cairo_box_t box;
/* When emitting a shading operator we are in cairo pattern
* coordinates. _cairo_pdf_surface_paint_gradient has set the
* ctm to the pattern matrix (including the convertion from
* pdf to cairo coordinates) */
_cairo_box_from_rectangle (&box, &pdf_pattern->extents);
_cairo_box_to_doubles (&box, &x1, &y1, &x2, &y2);
_cairo_matrix_transform_bounding_box (&pdf_pattern->pattern->matrix, &x1, &y1, &x2, &y2, NULL);
} else {
cairo_box_double_t box;
/* When emitting a shading pattern we are in pdf page
* coordinates. The color and alpha shading patterns painted
* in the XObject below contain the cairo pattern to pdf page
* matrix in the /Matrix entry of the pattern. */
_get_bbox_from_extents (pdf_pattern->height, &pdf_pattern->extents, &box);
x1 = box.p1.x;
y1 = box.p1.y;
x2 = box.p2.x;
y2 = box.p2.y;
}
status = _cairo_pdf_surface_open_stream (surface,
NULL,
surface->compress_content,
" /Type /XObject\n"
" /Subtype /Form\n"
" /FormType 1\n"
" /BBox [ 0 0 %f %f ]\n"
" /BBox [ %f %f %f %f ]\n"
" /Resources\n"
" << /ExtGState\n"
" << /a0 << /ca 1 /CA 1 >>"
@ -3476,8 +3500,7 @@ cairo_pdf_surface_emit_transparency_group (cairo_pdf_surface_t *surface,
" /I true\n"
" /CS /DeviceGray\n"
" >>\n",
surface->width,
surface->height,
x1,y1,x2,y2,
buf);
if (unlikely (status))
return status;