static inline SkMatrix
matrix_inverse_to_sk (const cairo_matrix_t& mat)
{
cairo_matrix_t inv = mat;
cairo_status_t status = cairo_matrix_invert (&inv);
assert (status == CAIRO_STATUS_SUCCESS);
return matrix_to_sk (inv);
}
static cairo_int_status_t
_cairo_skia_surface_stroke (void *asurface,
cairo_operator_t op,
const cairo_pattern_t *source,
cairo_path_fixed_t *path,
cairo_stroke_style_t *style,
cairo_matrix_t *ctm,
cairo_matrix_t *ctm_inverse,
double tolerance,
cairo_antialias_t antialias,
cairo_clip_t *clip)
{
cairo_skia_surface_t *surface = (cairo_skia_surface_t *) asurface;
cairo_image_surface_t *image = NULL;
cairo_status_t status;
void *image_extra;
status = _cairo_surface_clipper_set_clip (&surface->clipper, clip);
if (unlikely (status))
return (cairo_int_status_t) status;
SkPaint paint;
paint.setStyle (SkPaint::kStroke_Style);
SkColor color;
if (pattern_to_sk_color (source, color)) {
paint.setColor (color);
} else {
SkShader *shader = pattern_to_sk_shader (surface,
source, &image, &image_extra);
if (shader == NULL)
return UNSUPPORTED("pattern to shader conversion");
paint.setShader (shader);
shader->unref ();
paint.setFilterBitmap (pattern_filter_to_sk (source));
}
paint.setXfermodeMode (operator_to_sk (op));
paint.setAntiAlias (antialias != CAIRO_ANTIALIAS_NONE);
/* Convert the various stroke rendering bits */
paint.setStrokeWidth (SkFloatToScalar (style->line_width));
paint.setStrokeMiter (SkFloatToScalar (style->miter_limit));
static const SkPaint::Cap capMap[] = {
SkPaint::kButt_Cap,
SkPaint::kRound_Cap,
SkPaint::kSquare_Cap
};
paint.setStrokeCap (capMap[style->line_cap]);
static const SkPaint::Join joinMap[] = {
SkPaint::kMiter_Join,
SkPaint::kRound_Join,
SkPaint::kBevel_Join
};
paint.setStrokeJoin (joinMap[style->line_join]);
/* If we have a dash pattern, we need to
* create a SkDashPathEffect and set it on the Paint.
*/
if (style->dash != NULL) {
SkScalar intervals_static[20];
SkScalar *intervals = intervals_static;
int loop = 0;
unsigned int dash_count = style->num_dashes;
if ((dash_count & 1) != 0) {
loop = 1;
dash_count <<= 1;
}
if (dash_count > 20)
intervals = new SkScalar[dash_count];
unsigned int i = 0;
do {
for (unsigned int j = 0; i < style->num_dashes; j++)
intervals[i++] = SkFloatToScalar (style->dash[j]);
} while (loop--);
SkDashPathEffect *dash = new SkDashPathEffect (intervals,
dash_count,
SkFloatToScalar (style->dash_offset));
paint.setPathEffect (dash);
dash->unref ();
}
surface->canvas->save (SkCanvas::kMatrix_SaveFlag);
surface->canvas->concat (matrix_to_sk (*ctm));
surface->canvas->drawPath (path_to_sk (path, ctm_inverse), paint);
surface->canvas->restore ();
if (image != NULL) {
_cairo_surface_release_source_image (&surface->base,
image, image_extra);
}
return CAIRO_INT_STATUS_SUCCESS;
}
