static void
xps_parse_gradient_brush(fz_context *ctx, xps_document *doc, const fz_matrix *ctm, const fz_rect *area,
char *base_uri, xps_resource *dict, fz_xml *root,
void (*draw)(fz_context *ctx, xps_document *, const fz_matrix*, const fz_rect *, struct stop *, int, fz_xml *, int))
{
fz_xml *node;
char *opacity_att;
char *spread_att;
char *transform_att;
fz_xml *transform_tag = NULL;
fz_xml *stop_tag = NULL;
struct stop stop_list[MAX_STOPS];
int stop_count;
fz_matrix local_ctm;
int spread_method;
opacity_att = fz_xml_att(root, "Opacity");
spread_att = fz_xml_att(root, "SpreadMethod");
transform_att = fz_xml_att(root, "Transform");
for (node = fz_xml_down(root); node; node = fz_xml_next(node))
{
if (fz_xml_is_tag(node, "LinearGradientBrush.Transform"))
transform_tag = fz_xml_down(node);
if (fz_xml_is_tag(node, "RadialGradientBrush.Transform"))
transform_tag = fz_xml_down(node);
if (fz_xml_is_tag(node, "LinearGradientBrush.GradientStops"))
stop_tag = fz_xml_down(node);
if (fz_xml_is_tag(node, "RadialGradientBrush.GradientStops"))
stop_tag = fz_xml_down(node);
}
xps_resolve_resource_reference(ctx, doc, dict, &transform_att, &transform_tag, NULL);
spread_method = SPREAD_PAD;
if (spread_att)
{
if (!strcmp(spread_att, "Pad"))
spread_method = SPREAD_PAD;
if (!strcmp(spread_att, "Reflect"))
spread_method = SPREAD_REFLECT;
if (!strcmp(spread_att, "Repeat"))
spread_method = SPREAD_REPEAT;
}
xps_parse_transform(ctx, doc, transform_att, transform_tag, &local_ctm, ctm);
if (!stop_tag) {
fz_warn(ctx, "missing gradient stops tag");
return;
}
stop_count = xps_parse_gradient_stops(ctx, doc, base_uri, stop_tag, stop_list, MAX_STOPS);
if (stop_count == 0)
{
fz_warn(ctx, "no gradient stops found");
return;
}
xps_begin_opacity(ctx, doc, &local_ctm, area, base_uri, dict, opacity_att, NULL);
draw(ctx, doc, &local_ctm, area, stop_list, stop_count, root, spread_method);
xps_end_opacity(ctx, doc, base_uri, dict, opacity_att, NULL);
}
static void
xps_parse_gradient_brush(xps_document *doc, fz_matrix ctm, fz_rect area,
char *base_uri, xps_resource *dict, fz_xml *root,
void (*draw)(xps_document *, fz_matrix, fz_rect, struct stop *, int, fz_xml *, int))
{
fz_xml *node;
char *opacity_att;
char *interpolation_att;
char *spread_att;
char *mapping_att;
char *transform_att;
fz_xml *transform_tag = NULL;
fz_xml *stop_tag = NULL;
struct stop stop_list[MAX_STOPS];
int stop_count;
fz_matrix transform;
int spread_method;
opacity_att = fz_xml_att(root, "Opacity");
interpolation_att = fz_xml_att(root, "ColorInterpolationMode");
spread_att = fz_xml_att(root, "SpreadMethod");
mapping_att = fz_xml_att(root, "MappingMode");
transform_att = fz_xml_att(root, "Transform");
for (node = fz_xml_down(root); node; node = fz_xml_next(node))
{
if (!strcmp(fz_xml_tag(node), "LinearGradientBrush.Transform"))
transform_tag = fz_xml_down(node);
if (!strcmp(fz_xml_tag(node), "RadialGradientBrush.Transform"))
transform_tag = fz_xml_down(node);
if (!strcmp(fz_xml_tag(node), "LinearGradientBrush.GradientStops"))
stop_tag = fz_xml_down(node);
if (!strcmp(fz_xml_tag(node), "RadialGradientBrush.GradientStops"))
stop_tag = fz_xml_down(node);
}
xps_resolve_resource_reference(doc, dict, &transform_att, &transform_tag, NULL);
spread_method = SPREAD_PAD;
if (spread_att)
{
if (!strcmp(spread_att, "Pad"))
spread_method = SPREAD_PAD;
if (!strcmp(spread_att, "Reflect"))
spread_method = SPREAD_REFLECT;
if (!strcmp(spread_att, "Repeat"))
spread_method = SPREAD_REPEAT;
}
transform = fz_identity;
if (transform_att)
xps_parse_render_transform(doc, transform_att, &transform);
if (transform_tag)
xps_parse_matrix_transform(doc, transform_tag, &transform);
ctm = fz_concat(transform, ctm);
if (!stop_tag) {
fz_warn(doc->ctx, "missing gradient stops tag");
return;
}
stop_count = xps_parse_gradient_stops(doc, base_uri, stop_tag, stop_list, MAX_STOPS);
if (stop_count == 0)
{
fz_warn(doc->ctx, "no gradient stops found");
return;
}
xps_begin_opacity(doc, ctm, area, base_uri, dict, opacity_att, NULL);
draw(doc, ctm, area, stop_list, stop_count, root, spread_method);
xps_end_opacity(doc, base_uri, dict, opacity_att, NULL);
}