Esempi in C++ (Cpp) per emergency_pop_stack

Esempio n. 1

static void
fz_draw_clip_path(fz_device *devp, fz_path *path, fz_rect rect, int even_odd, fz_matrix ctm)
{
	fz_draw_device *dev = devp->user;
	float expansion = fz_matrix_expansion(ctm);
	float flatness = 0.3f / expansion;
	fz_bbox bbox;
	fz_draw_state *state = &dev->stack[dev->top];
	fz_colorspace *model;
	fz_context *ctx = dev->ctx;

	fz_reset_gel(dev->gel, state->scissor);
	fz_flatten_fill_path(dev->gel, path, ctm, flatness);
	fz_sort_gel(dev->gel);

	state = push_stack(dev);
	model = state->dest->colorspace;

	bbox = fz_bound_gel(dev->gel);
	bbox = fz_intersect_bbox(bbox, state->scissor);
	bbox = fz_intersect_bbox(bbox, fz_bbox_from_rect(rect));
	/* SumatraPDF: try to match rendering with and without display list */
	if (fz_is_infinite_rect(rect))
		bbox = fz_intersect_bbox(bbox, fz_bbox_from_rect(fz_bound_path(ctx, path, NULL, ctm)));

	if (fz_is_empty_rect(bbox) || fz_is_rect_gel(dev->gel))
	{
		state[1].scissor = bbox;
		state[1].mask = NULL;
#ifdef DUMP_GROUP_BLENDS
		dump_spaces(dev->top-1, "Clip (rectangular) begin\n");
#endif
		return;
	}

	fz_try(ctx)
	{
		state[1].mask = fz_new_pixmap_with_bbox(dev->ctx, NULL, bbox);
		fz_clear_pixmap(dev->ctx, state[1].mask);
		state[1].dest = fz_new_pixmap_with_bbox(dev->ctx, model, bbox);
		fz_clear_pixmap(dev->ctx, state[1].dest);
		if (state[1].shape)
		{
			state[1].shape = fz_new_pixmap_with_bbox(dev->ctx, NULL, bbox);
			fz_clear_pixmap(dev->ctx, state[1].shape);
		}

		fz_scan_convert(dev->gel, even_odd, bbox, state[1].mask, NULL);

		state[1].blendmode |= FZ_BLEND_ISOLATED;
		state[1].scissor = bbox;
#ifdef DUMP_GROUP_BLENDS
		dump_spaces(dev->top-1, "Clip (non-rectangular) begin\n");
#endif
	}
	fz_catch(ctx)
	{
		emergency_pop_stack(dev, state);
	}
}

Esempio n. 2

File: draw_device.c Progetto: iamplaced/sumatrapdf

static void
fz_draw_clip_stroke_path(fz_device *devp, fz_path *path, fz_rect *rect, fz_stroke_state *stroke, fz_matrix ctm)
{
	fz_draw_device *dev = devp->user;
	float expansion = fz_matrix_expansion(ctm);
	float flatness = 0.3f / expansion;
	float linewidth = stroke->linewidth;
	fz_bbox bbox;
	fz_draw_state *state = &dev->stack[dev->top];
	fz_colorspace *model;
	fz_context *ctx = dev->ctx;

	if (linewidth * expansion < 0.1f)
		linewidth = 1 / expansion;

	fz_reset_gel(dev->gel, state->scissor);
	if (stroke->dash_len > 0)
		fz_flatten_dash_path(dev->gel, path, stroke, ctm, flatness, linewidth);
	else
		fz_flatten_stroke_path(dev->gel, path, stroke, ctm, flatness, linewidth);
	fz_sort_gel(dev->gel);

	state = push_stack(dev);
	model = state->dest->colorspace;

	bbox = fz_bound_gel(dev->gel);
	bbox = fz_intersect_bbox(bbox, state->scissor);
	if (rect)
		bbox = fz_intersect_bbox(bbox, fz_bbox_covering_rect(*rect));
	/* SumatraPDF: try to match rendering with and without display list */
	else
		bbox = fz_intersect_bbox(bbox, fz_bbox_covering_rect(fz_bound_path(ctx, path, stroke, ctm)));

	fz_try(ctx)
	{
		state[1].mask = fz_new_pixmap_with_bbox(dev->ctx, NULL, bbox);
		fz_clear_pixmap(dev->ctx, state[1].mask);
		state[1].dest = fz_new_pixmap_with_bbox(dev->ctx, model, bbox);
		fz_clear_pixmap(dev->ctx, state[1].dest);
		if (state->shape)
		{
			state[1].shape = fz_new_pixmap_with_bbox(dev->ctx, NULL, bbox);
			fz_clear_pixmap(dev->ctx, state[1].shape);
		}

		if (!fz_is_empty_rect(bbox))
			fz_scan_convert(dev->gel, 0, bbox, state[1].mask, NULL);

		state[1].blendmode |= FZ_BLEND_ISOLATED;
		state[1].scissor = bbox;
#ifdef DUMP_GROUP_BLENDS
		dump_spaces(dev->top-1, "Clip (stroke) begin\n");
#endif
	}
	fz_catch(ctx)
	{
		emergency_pop_stack(dev, state);
	}
}