Esempi in C++ (Cpp) per SkDashPathEffect

Esempio n. 1

File: cairo-skia-context.cpp Progetto: Ashod/WinCairoRequirements

static cairo_status_t
_cairo_skia_context_set_dash (void *abstract_cr,
			      const double *dashes,
			      int	      num_dashes,
			      double	      offset)
{
    cairo_skia_context_t *cr = (cairo_skia_context_t *) abstract_cr;
    SkScalar intervals_static[20];
    SkScalar *intervals = intervals_static;

    if (num_dashes == 0) {
	cr->paint->setPathEffect (NULL);
	return CAIRO_STATUS_SUCCESS;
    }

    int loop = 0;
    if ((num_dashes & 1) != 0) {
	loop = 1;
	num_dashes <<= 1;
    }

    if (num_dashes > 20)
	intervals = new SkScalar[num_dashes];

    int i = 0;
    do {
	for (int j = 0; i < num_dashes; j++)
	    intervals[i++] = SkFloatToScalar (dashes[j]);
    } while (loop--);

    SkDashPathEffect *dash = new SkDashPathEffect (intervals, num_dashes, SkFloatToScalar (offset));

    cr->paint->setPathEffect (dash);
    dash->unref ();

    return CAIRO_STATUS_SUCCESS;
}

Esempio n. 2

File: cairo-skia-surface.cpp Progetto: AZed/cairo

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;
}