return self->end;
}
+/*** GSK_CONIC_GRADIENT_NODE ***/
+
+struct _GskConicGradientNode
+{
+ GskRenderNode render_node;
+
+ graphene_point_t center;
+ float rotation;
+
+ gsize n_stops;
+ GskColorStop *stops;
+};
+
+static void
+gsk_conic_gradient_node_finalize (GskRenderNode *node)
+{
+ GskConicGradientNode *self = (GskConicGradientNode *) node;
+ GskRenderNodeClass *parent_class = g_type_class_peek (g_type_parent (GSK_TYPE_CONIC_GRADIENT_NODE));
+
+ g_free (self->stops);
+
+ parent_class->finalize (node);
+}
+
+#define DEG_TO_RAD(x) ((x) * (G_PI / 180.f))
+
+static void
+_cairo_mesh_pattern_set_corner_rgba (cairo_pattern_t *pattern,
+ guint corner_num,
+ const GdkRGBA *rgba)
+{
+ cairo_mesh_pattern_set_corner_color_rgba (pattern, corner_num, rgba->red, rgba->green, rgba->blue, rgba->alpha);
+}
+
+static void
+project (double angle,
+ double radius,
+ double *x_out,
+ double *y_out)
+{
+ double x, y;
+
+ x = radius * cos (angle);
+ y = radius * sin (angle);
+ if (copysign (x, 1.0) > copysign (y, 1.0))
+ {
+ *x_out = copysign (radius, x);
+ *y_out = y * radius / copysign (x, 1.0);
+ }
+ else
+ {
+ *x_out = x * radius / copysign (y, 1.0);
+ *y_out = copysign (radius, y);
+ }
+}
+
+static void
+gsk_conic_gradient_node_add_patch (cairo_pattern_t *pattern,
+ float radius,
+ float start_angle,
+ const GdkRGBA *start_color,
+ float end_angle,
+ const GdkRGBA *end_color)
+{
+ double x, y;
+
+ cairo_mesh_pattern_begin_patch (pattern);
+
+ cairo_mesh_pattern_move_to (pattern, 0, 0);
+ project (start_angle, radius, &x, &y);
+ cairo_mesh_pattern_line_to (pattern, x, y);
+ project (end_angle, radius, &x, &y);
+ cairo_mesh_pattern_line_to (pattern, x, y);
+ cairo_mesh_pattern_line_to (pattern, 0, 0);
+
+ _cairo_mesh_pattern_set_corner_rgba (pattern, 0, start_color);
+ _cairo_mesh_pattern_set_corner_rgba (pattern, 1, start_color);
+ _cairo_mesh_pattern_set_corner_rgba (pattern, 2, end_color);
+ _cairo_mesh_pattern_set_corner_rgba (pattern, 3, end_color);
+
+ cairo_mesh_pattern_end_patch (pattern);
+}
+
+static void
+gdk_rgba_color_interpolate (GdkRGBA *dest,
+ const GdkRGBA *src1,
+ const GdkRGBA *src2,
+ double progress)
+{
+ double alpha = src1->alpha * (1.0 - progress) + src2->alpha * progress;
+
+ dest->alpha = alpha;
+ if (alpha == 0)
+ {
+ dest->red = src1->red * (1.0 - progress) + src2->red * progress;
+ dest->green = src1->green * (1.0 - progress) + src2->green * progress;
+ dest->blue = src1->blue * (1.0 - progress) + src2->blue * progress;
+ }
+ else
+ {
+ dest->red = (src1->red * src1->alpha * (1.0 - progress) + src2->red * src2->alpha * progress) / alpha;
+ dest->green = (src1->green * src1->alpha * (1.0 - progress) + src2->green * src2->alpha * progress) / alpha;
+ dest->blue = (src1->blue * src1->alpha * (1.0 - progress) + src2->blue * src2->alpha * progress) / alpha;
+ }
+}
+
+static void
+gsk_conic_gradient_node_draw (GskRenderNode *node,
+ cairo_t *cr)
+{
+ GskConicGradientNode *self = (GskConicGradientNode *) node;
+ cairo_pattern_t *pattern;
+ graphene_point_t corner;
+ float radius;
+ gsize i;
+
+ pattern = cairo_pattern_create_mesh ();
+ graphene_rect_get_top_right (&node->bounds, &corner);
+ radius = graphene_point_distance (&self->center, &corner, NULL, NULL);
+ graphene_rect_get_bottom_right (&node->bounds, &corner);
+ radius = MAX (radius, graphene_point_distance (&self->center, &corner, NULL, NULL));
+ graphene_rect_get_bottom_left (&node->bounds, &corner);
+ radius = MAX (radius, graphene_point_distance (&self->center, &corner, NULL, NULL));
+ graphene_rect_get_top_left (&node->bounds, &corner);
+ radius = MAX (radius, graphene_point_distance (&self->center, &corner, NULL, NULL));
+
+ for (i = 0; i <= self->n_stops; i++)
+ {
+ GskColorStop *stop1 = &self->stops[MAX (i, 1) - 1];
+ GskColorStop *stop2 = &self->stops[MIN (i, self->n_stops - 1)];
+ double offset1 = i > 0 ? stop1->offset : 0;
+ double offset2 = i < self->n_stops ? stop2->offset : 1;
+ double start_angle, end_angle;
+
+ offset1 = offset1 * 360 + self->rotation - 90;
+ offset2 = offset2 * 360 + self->rotation - 90;
+
+ for (start_angle = offset1; start_angle < offset2; start_angle = end_angle)
+ {
+ GdkRGBA start_color, end_color;
+ end_angle = (floor (start_angle / 45) + 1) * 45;
+ end_angle = MIN (end_angle, offset2);
+ gdk_rgba_color_interpolate (&start_color,
+ &stop1->color,
+ &stop2->color,
+ (start_angle - offset1) / (offset2 - offset1));
+ gdk_rgba_color_interpolate (&end_color,
+ &stop1->color,
+ &stop2->color,
+ (end_angle - offset1) / (offset2 - offset1));
+
+ gsk_conic_gradient_node_add_patch (pattern,
+ radius,
+ DEG_TO_RAD (start_angle),
+ &start_color,
+ DEG_TO_RAD (end_angle),
+ &end_color);
+ }
+ }
+
+ cairo_pattern_set_extend (pattern, CAIRO_EXTEND_PAD);
+
+ gsk_cairo_rectangle (cr, &node->bounds);
+ cairo_translate (cr, self->center.x, self->center.y);
+ cairo_set_source (cr, pattern);
+ cairo_fill (cr);
+
+ cairo_pattern_destroy (pattern);
+}
+
+static void
+gsk_conic_gradient_node_diff (GskRenderNode *node1,
+ GskRenderNode *node2,
+ cairo_region_t *region)
+{
+ GskConicGradientNode *self1 = (GskConicGradientNode *) node1;
+ GskConicGradientNode *self2 = (GskConicGradientNode *) node2;
+ gsize i;
+
+ if (!graphene_point_equal (&self1->center, &self2->center) ||
+ self1->rotation != self2->rotation ||
+ self1->n_stops != self2->n_stops)
+ {
+ gsk_render_node_diff_impossible (node1, node2, region);
+ return;
+ }
+
+ for (i = 0; i < self1->n_stops; i++)
+ {
+ GskColorStop *stop1 = &self1->stops[i];
+ GskColorStop *stop2 = &self2->stops[i];
+
+ if (stop1->offset != stop2->offset ||
+ !gdk_rgba_equal (&stop1->color, &stop2->color))
+ {
+ gsk_render_node_diff_impossible (node1, node2, region);
+ return;
+ }
+ }
+}
+
+/**
+ * gsk_conic_gradient_node_new:
+ * @bounds: the bounds of the node
+ * @center: the center of the gradient
+ * @rotation: the rotation of the gradient in degrees
+ * @color_stops: (array length=n_color_stops): a pointer to an array of #GskColorStop defining the gradient
+ * The offsets of all color steps must be increasing. The first stop's offset must be >= 0 and the last
+ * stop's offset must be <= 1.
+ * @n_color_stops: the number of elements in @color_stops
+ *
+ * Creates a #GskRenderNode that draws a conic gradient. The conic gradient
+ * starts around @center in the direction of @rotation. A rotation of 0 means
+ * that the gradient points up. Color stops are then added clockwise.
+ *
+ * Returns: (transfer full) (type GskConicGradientNode): A new #GskRenderNode
+ */
+GskRenderNode *
+gsk_conic_gradient_node_new (const graphene_rect_t *bounds,
+ const graphene_point_t *center,
+ float rotation,
+ const GskColorStop *color_stops,
+ gsize n_color_stops)
+{
+ GskConicGradientNode *self;
+ GskRenderNode *node;
+ gsize i;
+
+ g_return_val_if_fail (bounds != NULL, NULL);
+ g_return_val_if_fail (center != NULL, NULL);
+ g_return_val_if_fail (color_stops != NULL, NULL);
+ g_return_val_if_fail (n_color_stops >= 2, NULL);
+ g_return_val_if_fail (color_stops[0].offset >= 0, NULL);
+ for (i = 1; i < n_color_stops; i++)
+ g_return_val_if_fail (color_stops[i].offset >= color_stops[i - 1].offset, NULL);
+ g_return_val_if_fail (color_stops[n_color_stops - 1].offset <= 1, NULL);
+
+ self = gsk_render_node_alloc (GSK_CONIC_GRADIENT_NODE);
+ node = (GskRenderNode *) self;
+
+ graphene_rect_init_from_rect (&node->bounds, bounds);
+ graphene_point_init_from_point (&self->center, center);
+
+ self->rotation = rotation;
+
+ self->n_stops = n_color_stops;
+ self->stops = g_malloc_n (n_color_stops, sizeof (GskColorStop));
+ memcpy (self->stops, color_stops, n_color_stops * sizeof (GskColorStop));
+
+ return node;
+}
+
+/**
+ * gsk_conic_gradient_node_get_n_color_stops:
+ * @node: (type GskConicGradientNode): a #GskRenderNode for a conic gradient
+ *
+ * Retrieves the number of color stops in the gradient.
+ *
+ * Returns: the number of color stops
+ */
+gsize
+gsk_conic_gradient_node_get_n_color_stops (GskRenderNode *node)
+{
+ GskConicGradientNode *self = (GskConicGradientNode *) node;
+
+ return self->n_stops;
+}
+
+/**
+ * gsk_conic_gradient_node_get_color_stops:
+ * @node: (type GskConicGradientNode): a #GskRenderNode for a conic gradient
+ * @n_stops: (out) (optional): the number of color stops in the returned array
+ *
+ * Retrieves the color stops in the gradient.
+ *
+ * Returns: (array length=n_stops): the color stops in the gradient
+ */
+const GskColorStop *
+gsk_conic_gradient_node_get_color_stops (GskRenderNode *node,
+ gsize *n_stops)
+{
+ GskConicGradientNode *self = (GskConicGradientNode *) node;
+
+ if (n_stops != NULL)
+ *n_stops = self->n_stops;
+
+ return self->stops;
+}
+
+/**
+ * gsk_conic_gradient_node_get_center:
+ * @node: (type GskConicGradientNode): a #GskRenderNode for a conic gradient
+ *
+ * Retrieves the center pointer for the gradient.
+ *
+ * Returns: the center point for the gradient
+ */
+const graphene_point_t *
+gsk_conic_gradient_node_get_center (GskRenderNode *node)
+{
+ GskConicGradientNode *self = (GskConicGradientNode *) node;
+
+ return &self->center;
+}
+
+/**
+ * gsk_conic_gradient_node_get_rotation:
+ * @node: (type GskConicGradientNode): a #GskRenderNode for a conic gradient
+ *
+ * Retrieves the rotation for the gradient in degrees.
+ *
+ * Returns: the rotation for the gradient
+ */
+float
+gsk_conic_gradient_node_get_rotation (GskRenderNode *node)
+{
+ GskConicGradientNode *self = (GskConicGradientNode *) node;
+
+ return self->rotation;
+}
+
/*** GSK_BORDER_NODE ***/
struct _GskBorderNode
GSK_DEFINE_RENDER_NODE_TYPE (gsk_repeating_linear_gradient_node, GSK_REPEATING_LINEAR_GRADIENT_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_radial_gradient_node, GSK_RADIAL_GRADIENT_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_repeating_radial_gradient_node, GSK_REPEATING_RADIAL_GRADIENT_NODE)
+GSK_DEFINE_RENDER_NODE_TYPE (gsk_conic_gradient_node, GSK_CONIC_GRADIENT_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_border_node, GSK_BORDER_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_texture_node, GSK_TEXTURE_NODE)
GSK_DEFINE_RENDER_NODE_TYPE (gsk_inset_shadow_node, GSK_INSET_SHADOW_NODE)
gsk_render_node_types[GSK_REPEATING_RADIAL_GRADIENT_NODE] = node_type;
}
+ {
+ const GskRenderNodeTypeInfo node_info =
+ {
+ GSK_REPEATING_RADIAL_GRADIENT_NODE,
+ sizeof (GskRadialGradientNode),
+ NULL,
+ gsk_conic_gradient_node_finalize,
+ gsk_conic_gradient_node_draw,
+ NULL,
+ gsk_conic_gradient_node_diff,
+ };
+
+ GType node_type = gsk_render_node_type_register_static (I_("GskConicGradientNode"), &node_info);
+ gsk_render_node_types[GSK_CONIC_GRADIENT_NODE] = node_type;
+ }
+
{
const GskRenderNodeTypeInfo node_info =
{
return parse_radial_gradient_node_internal (parser, TRUE);
}
+static GskRenderNode *
+parse_conic_gradient_node (GtkCssParser *parser)
+{
+ graphene_rect_t bounds = GRAPHENE_RECT_INIT (0, 0, 50, 50);
+ graphene_point_t center = GRAPHENE_POINT_INIT (25, 25);
+ double rotation = 0.0;
+ GArray *stops = NULL;
+ const Declaration declarations[] = {
+ { "bounds", parse_rect, NULL, &bounds },
+ { "center", parse_point, NULL, ¢er },
+ { "rotation", parse_double, NULL, &rotation },
+ { "stops", parse_stops, clear_stops, &stops },
+ };
+ GskRenderNode *result;
+
+ parse_declarations (parser, declarations, G_N_ELEMENTS(declarations));
+ if (stops == NULL)
+ {
+ GskColorStop from = { 0.0, GDK_RGBA("AAFF00") };
+ GskColorStop to = { 1.0, GDK_RGBA("FF00CC") };
+
+ stops = g_array_new (FALSE, FALSE, sizeof (GskColorStop));
+ g_array_append_val (stops, from);
+ g_array_append_val (stops, to);
+ }
+
+ result = gsk_conic_gradient_node_new (&bounds, ¢er, rotation,
+ (GskColorStop *) stops->data, stops->len);
+
+ g_array_free (stops, TRUE);
+
+ return result;
+}
+
static GskRenderNode *
parse_inset_shadow_node (GtkCssParser *parser)
{
{ "inset-shadow", parse_inset_shadow_node },
{ "linear-gradient", parse_linear_gradient_node },
{ "radial-gradient", parse_radial_gradient_node },
+ { "conic-gradient", parse_conic_gradient_node },
{ "opacity", parse_opacity_node },
{ "outset-shadow", parse_outset_shadow_node },
{ "repeat", parse_repeat_node },
}
break;
+ case GSK_CONIC_GRADIENT_NODE:
+ {
+ start_node (p, "conic-gradient");
+
+ append_rect_param (p, "bounds", &node->bounds);
+ append_point_param (p, "center", gsk_conic_gradient_node_get_center (node));
+ append_float_param (p, "rotation", gsk_conic_gradient_node_get_rotation (node), 0.0f);
+
+ append_stops_param (p, "stops", gsk_conic_gradient_node_get_color_stops (node, NULL),
+ gsk_conic_gradient_node_get_n_color_stops (node));
+
+ end_node (p);
+ }
+ break;
+
case GSK_OPACITY_NODE:
{
start_node (p, "opacity");
projects / gtk4.git / commitdiff