svg_base_sani.c

一个用于智能手机的多媒体库适合S60 WinCE的跨平台开发库

}

void svg_sani_init_path(Render2D *sr, GF_Node *node)
{
	drawable_stack_new(sr, node);
	gf_node_set_callback_function(node, svg_sani_render_path);
}

/* end of rendering of basic shapes */


static void svg_sani_render_a(GF_Node *node, void *rs, Bool is_destroy)
{
	GF_Matrix2D backup_matrix;
	SVG_SANI_aElement *a = (SVG_SANI_aElement *) node;
	RenderEffect2D *eff = (RenderEffect2D *)rs;

	if (is_destroy) return;

	svg_sani_render_base(node, eff);

	if (eff->traversing_mode == TRAVERSE_GET_BOUNDS) {
		gf_svg_sani_apply_local_transformation(eff, node, &backup_matrix);
		if (a->display != SVG_DISPLAY_NONE) svg_get_nodes_bounds(node, a->children, eff);
		gf_svg_sani_restore_parent_transformation(eff, &backup_matrix);  
		return;
	}

	if (a->display != SVG_DISPLAY_NONE && a->visibility != SVG_VISIBILITY_HIDDEN) {
		gf_svg_sani_apply_local_transformation(eff, node, &backup_matrix);
		svg_render_node_list(a->children, eff);
		gf_svg_sani_restore_parent_transformation(eff, &backup_matrix);  
	}
}

static void svg_sani_a_HandleEvent(GF_Node *handler, GF_DOM_Event *event)
{
	GF_Renderer *compositor;
	GF_Event evt;
	SVG_SANI_aElement *a;

	assert(gf_node_get_tag(event->currentTarget)==TAG_SVG_SANI_a);

	a = (SVG_SANI_aElement *) event->currentTarget;
	compositor = (GF_Renderer *)gf_node_get_private(handler);

	if (!compositor->user->EventProc) return;

	evt.type = GF_EVENT_NAVIGATE;
	
	if (a->xlink->href.type == XMLRI_STRING) {
		evt.navigate.to_url = a->xlink->href.iri;
		if (evt.navigate.to_url) {
			evt.navigate.param_count = 1;
			evt.navigate.parameters = (const char **) &a->target;
			compositor->user->EventProc(compositor->user->opaque, &evt);
		}
	} else {
		u32 tag;
		if (!a->xlink->href.target) {
			/* TODO: check if href can be resolved */
			return;
		} 
		tag = gf_node_get_tag((GF_Node *)a->xlink->href.target);
		if (tag == TAG_SVG_SANI_set ||
			tag == TAG_SVG_SANI_animate ||
			tag == TAG_SVG_SANI_animateColor ||
			tag == TAG_SVG_SANI_animateTransform ||
			tag == TAG_SVG_SANI_animateMotion || 
			tag == TAG_SVG_SANI_discard) {
			u32 i, count, found;
			SVG_SANI_setElement *set = (SVG_SANI_setElement *)a->xlink->href.target;
			SMIL_Time *begin;
			GF_SAFEALLOC(begin, SMIL_Time);
			begin->type = GF_SMIL_TIME_EVENT_RESOLVED;
			begin->clock = gf_node_get_scene_time((GF_Node *)set);

			found = 0;
			count = gf_list_count(set->timing->begin);
			for (i=0; i<count; i++) {
				SMIL_Time *first = (SMIL_Time *)gf_list_get(set->timing->begin, i);
				/*remove past instanciations*/
				if ((first->type==GF_SMIL_TIME_EVENT_RESOLVED) && (first->clock < begin->clock)) {
					gf_list_rem(set->timing->begin, i);
					free(first);
					i--;
					count--;
					continue;
				}
				if ( (first->type == GF_SMIL_TIME_INDEFINITE) 
					|| ( (first->type == GF_SMIL_TIME_CLOCK) && (first->clock > begin->clock) ) 
				) {
					gf_list_insert(set->timing->begin, begin, i);
					found = 1;
					break;
				}
			}
			if (!found) gf_list_add(set->timing->begin, begin);
			gf_node_changed((GF_Node *)a->xlink->href.target, NULL);
		}
	}
	return;
}

void svg_sani_init_a(Render2D *sr, GF_Node *node)
{
	SVG_SANI_handlerElement *handler;
	gf_node_set_callback_function(node, svg_sani_render_a);

	/*listener for onClick event*/
	handler = gf_dom_listener_build(node, GF_EVENT_CLICK, 0, NULL);
	/*and overwrite handler*/
	handler->handle_event = svg_sani_a_HandleEvent;
	gf_node_set_private((GF_Node *)handler, sr->compositor);

	/*listener for activate event*/
	handler = gf_dom_listener_build(node, GF_EVENT_ACTIVATE, 0, NULL);
	/*and overwrite handler*/
	handler->handle_event = svg_sani_a_HandleEvent;
	gf_node_set_private((GF_Node *)handler, sr->compositor);

	/*listener for mouseover event*/
	handler = gf_dom_listener_build(node, GF_EVENT_MOUSEOVER, 0, NULL);
	/*and overwrite handler*/
	handler->handle_event = svg_sani_a_HandleEvent;
	gf_node_set_private((GF_Node *)handler, sr->compositor);
}
/* end of Interactive SVG elements */


/*SVG gradient common stuff*/
typedef struct
{
	GF_TextureHandler txh;
	u32 *cols;
	Fixed *keys;
	u32 nb_col;
} SVG_SANI_GradientStack;

static void svg_sani_DestroyGradient(GF_Node *node)
{
	SVG_SANI_GradientStack *st = (SVG_SANI_GradientStack *) gf_node_get_private(node);
	gf_sr_texture_destroy(&st->txh);
	if (st->cols) free(st->cols);
	if (st->keys) free(st->keys);
	free(st);
}

static void svg_sani_UpdateGradient(SVG_SANI_GradientStack *st, GF_ChildNodeItem *children)
{
	u32 count;
	Fixed alpha, max_offset;

	if (!gf_node_dirty_get(st->txh.owner)) return;
	gf_node_dirty_clear(st->txh.owner, 0);

	st->txh.needs_refresh = 1;
	st->txh.transparent = 0;
	count = gf_node_list_get_count(children);
	st->nb_col = 0;
	st->cols = (u32*)realloc(st->cols, sizeof(u32)*count);
	st->keys = (Fixed*)realloc(st->keys, sizeof(Fixed)*count);

	max_offset = 0;
	while (children) {
		Fixed key;
		SVG_SANI_stopElement *gstop = (SVG_SANI_stopElement *) children->node;
		children = children->next;
		if (gf_node_get_tag((GF_Node *)gstop) != TAG_SVG_SANI_stop) continue;

		if (gstop->stop_opacity.type==SVG_NUMBER_VALUE) alpha = gstop->stop_opacity.value;
		else alpha = FIX_ONE;
		st->cols[st->nb_col] = GF_COL_ARGB_FIXED(alpha, gstop->stop_color.color.red, gstop->stop_color.color.green, gstop->stop_color.color.blue);
		key = gstop->offset.value;
		if (gstop->offset.value>FIX_ONE) key/=100; 
		if (key>max_offset) max_offset=key;
		else key = max_offset;
		st->keys[st->nb_col] = key;

		st->nb_col++;
		if (alpha!=FIX_ONE) st->txh.transparent = 1;
	}
	st->txh.compositor->r2d->stencil_set_gradient_interpolation(st->txh.hwtx, st->keys, st->cols, st->nb_col);
	st->txh.compositor->r2d->stencil_set_gradient_mode(st->txh.hwtx, /*lg->spreadMethod*/ GF_GRADIENT_MODE_PAD);
}

static void svg_sani_render_PaintServer(GF_Node *node, void *rs, Bool is_destroy)
{
	SVG_SANI_Element *elt = (SVG_SANI_Element *)node;
	RenderEffect2D *eff = (RenderEffect2D *) rs;

	if (is_destroy) {
		if (gf_node_get_private(node)) svg_sani_DestroyGradient(node);
		return;
	}

	svg_sani_render_base(node, eff);
	
	if (eff->traversing_mode == TRAVERSE_GET_BOUNDS) {
		return;
	} else {
		svg_render_node_list(elt->children, eff);
	}
}


/* linear gradient */
static void svg_sani_UpdateLinearGradient(GF_TextureHandler *txh)
{
	SVG_SANI_linearGradientElement *lg = (SVG_SANI_linearGradientElement *) txh->owner;
	SVG_SANI_GradientStack *st = (SVG_SANI_GradientStack *) gf_node_get_private(txh->owner);
	if (!txh->hwtx) txh->hwtx = txh->compositor->r2d->stencil_new(txh->compositor->r2d, GF_STENCIL_LINEAR_GRADIENT);

	svg_sani_UpdateGradient(st, lg->children);
}

static void svg_sani_LG_ComputeMatrix(GF_TextureHandler *txh, GF_Rect *bounds, GF_Matrix2D *mat)
{
	SFVec2f start, end;
	SVG_SANI_linearGradientElement *lg = (SVG_SANI_linearGradientElement *) txh->owner;

	/*create gradient brush if needed*/
	if (!txh->hwtx) return;

	start.x = lg->x1.value;
	if (lg->x1.type==SVG_NUMBER_PERCENTAGE) start.x /= 100;
	start.y = lg->y1.value;
	if (lg->y1.type==SVG_NUMBER_PERCENTAGE) start.y /= 100;
	end.x = lg->x2.value;
	if (lg->x2.type==SVG_NUMBER_PERCENTAGE) end.x /= 100;
	end.y = lg->y2.value;
	if (lg->y2.type==SVG_NUMBER_PERCENTAGE) end.x /= 100;

	txh->compositor->r2d->stencil_set_gradient_mode(txh->hwtx, (GF_GradientMode) lg->spreadMethod);

	gf_mx2d_copy(*mat, lg->gradientTransform.mat);

	if (lg->gradientUnits==SVG_GRADIENTUNITS_OBJECT) {
		/*move to local coord system - cf SVG spec*/
		gf_mx2d_add_scale(mat, bounds->width, bounds->height);
		gf_mx2d_add_translation(mat, bounds->x - 1, bounds->y  - bounds->height - 1);
	}
	txh->compositor->r2d->stencil_set_linear_gradient(txh->hwtx, start.x, start.y, end.x, end.y);
}

void svg_sani_init_linearGradient(Render2D *sr, GF_Node *node)
{
	SVG_SANI_GradientStack *st;
	GF_SAFEALLOC(st, SVG_SANI_GradientStack);

	gf_sr_texture_setup(&st->txh, sr->compositor, node);
	st->txh.update_texture_fcnt = svg_sani_UpdateLinearGradient;

	st->txh.compute_gradient_matrix = svg_sani_LG_ComputeMatrix;
	gf_node_set_private(node, st);
	gf_node_set_callback_function(node, svg_sani_render_PaintServer);
}

/* radial gradient */

static void svg_sani_UpdateRadialGradient(GF_TextureHandler *txh)
{
	SVG_SANI_radialGradientElement *rg = (SVG_SANI_radialGradientElement *) txh->owner;
	SVG_SANI_GradientStack *st = (SVG_SANI_GradientStack *) gf_node_get_private(txh->owner);
	if (!txh->hwtx) txh->hwtx = txh->compositor->r2d->stencil_new(txh->compositor->r2d, GF_STENCIL_RADIAL_GRADIENT);
	svg_sani_UpdateGradient(st, rg->children);
}

static void svg_sani_rG_ComputeMatrix(GF_TextureHandler *txh, GF_Rect *bounds, GF_Matrix2D *mat)
{
	SFVec2f center, focal;
	Fixed radius;
	SVG_SANI_radialGradientElement *rg = (SVG_SANI_radialGradientElement *) txh->owner;

	/*create gradient brush if needed*/
	if (!txh->hwtx) return;

	gf_mx2d_copy(*mat, rg->gradientTransform.mat);

	radius = rg->r.value;
	if (rg->r.type==SVG_NUMBER_PERCENTAGE) radius /= 100;
	center.x = rg->cx.value;
	if (rg->cx.type==SVG_NUMBER_PERCENTAGE) center.x /= 100;
	center.y = rg->cy.value;
	if (rg->cy.type==SVG_NUMBER_PERCENTAGE) center.y /= 100;

	txh->compositor->r2d->stencil_set_gradient_mode(txh->hwtx, (GF_GradientMode) rg->spreadMethod);

	focal.x = rg->fx.value;
	if (rg->fx.type==SVG_NUMBER_PERCENTAGE) focal.x /= 100;
	focal.y = rg->fy.value;
	if (rg->fy.type==SVG_NUMBER_PERCENTAGE) focal.y /= 100;

	if (rg->gradientUnits==SVG_GRADIENTUNITS_OBJECT) {
		/*move to local coord system - cf SVG spec*/
		gf_mx2d_add_scale(mat, bounds->width, bounds->height);
		gf_mx2d_add_translation(mat, bounds->x, bounds->y  - bounds->height);
	} else if ((rg->fx.value==rg->fy.value) && (rg->fx.value==FIX_ONE/2)) {
		focal.x = center.x;
		focal.y = center.y;
	}
	txh->compositor->r2d->stencil_set_radial_gradient(txh->hwtx, center.x, center.y, focal.x, focal.y, radius, radius);
}

void svg_sani_init_radialGradient(Render2D *sr, GF_Node *node)
{
	SVG_SANI_GradientStack *st;
	GF_SAFEALLOC(st, SVG_SANI_GradientStack);

	gf_sr_texture_setup(&st->txh, sr->compositor, node);
	st->txh.update_texture_fcnt = svg_sani_UpdateRadialGradient;
	st->txh.compute_gradient_matrix = svg_sani_rG_ComputeMatrix;
	gf_node_set_private(node, st);
	gf_node_set_callback_function(node, svg_sani_render_PaintServer);
}

void svg_sani_init_solidColor(Render2D *sr, GF_Node *node)
{
	gf_node_set_callback_function(node, svg_sani_render_PaintServer);
}

void svg_sani_init_stop(Render2D *sr, GF_Node *node)
{
	gf_node_set_callback_function(node, svg_sani_render_PaintServer);
}

GF_TextureHandler *svg_sani_gradient_get_texture(GF_Node *node)
{
	SVG_SANI_Element *g = (SVG_SANI_Element *)node;
	SVG_SANI_GradientStack *st;
	if (g->xlink->href.target) g = g->xlink->href.target;
	st = (SVG_SANI_GradientStack*) gf_node_get_private((GF_Node *)g);
	return st->nb_col ? &st->txh : NULL;
}

void svg_sani_render_base(GF_Node *node, RenderEffect2D *eff)
{	
	gf_svg_sani_apply_animations(node);
	eff->svg_flags |= gf_node_dirty_get(node);
}

void r2d_render_svg_sani_use(GF_Node *node, GF_Node *sub_root, void *rs)
{
	GF_Matrix2D backup_matrix;
  	GF_Matrix2D translate;
	GF_Node *prev_use;
	SVG_SANI_useElement *use = (SVG_SANI_useElement *)node;
	RenderEffect2D *eff = (RenderEffect2D *)rs;

	svg_sani_render_base(node, eff);

	gf_mx2d_init(translate);
	translate.m[2] = use->x.value;
	translate.m[5] = use->y.value;

	if (eff->traversing_mode == TRAVERSE_GET_BOUNDS) {
		gf_svg_sani_apply_local_transformation(eff, node, &backup_matrix);
		if (use->display != SVG_DISPLAY_NONE) {
			gf_node_render((GF_Node*)use->xlink->href.target, eff);
			gf_mx2d_apply_rect(&translate, &eff->bounds);
		} 
		gf_svg_sani_restore_parent_transformation(eff, &backup_matrix);
		return;
	}

	if (use->display == SVG_DISPLAY_NONE ||
		use->visibility == SVG_VISIBILITY_HIDDEN) {
		return;
	}

	gf_svg_sani_apply_local_transformation(eff, node, &backup_matrix);

	gf_mx2d_pre_multiply(&eff->transform, &translate);
	prev_use = eff->parent_use;
	eff->parent_use = use->xlink->href.target;
	gf_node_render(use->xlink->href.target, eff);
	eff->parent_use = prev_use;
	gf_svg_sani_restore_parent_transformation(eff, &backup_matrix);  
}


#endif	/*GPAC_ENABLE_SVG_SANI*/

#endif //GPAC_DISABLE_SVG