diff --git a/clutter/clutter/clutter-canvas.c b/clutter/clutter/clutter-canvas.c index 9f29f18ad..f49442b16 100644 --- a/clutter/clutter/clutter-canvas.c +++ b/clutter/clutter/clutter-canvas.c @@ -44,6 +44,7 @@ #include "clutter-build-config.h" +#include #include #include @@ -69,6 +70,7 @@ struct _ClutterCanvasPrivate int width; int height; + float scale_factor; CoglTexture *texture; gboolean dirty; @@ -82,6 +84,7 @@ enum PROP_WIDTH, PROP_HEIGHT, + PROP_SCALE_FACTOR, LAST_PROP }; @@ -178,6 +181,19 @@ clutter_canvas_set_property (GObject *gobject, } break; + case PROP_SCALE_FACTOR: + { + gfloat new_scale_factor = g_value_get_float (value); + + if (priv->scale_factor != new_scale_factor) + { + priv->scale_factor = new_scale_factor; + + clutter_content_invalidate (CLUTTER_CONTENT (gobject)); + } + } + break; + default: G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec); break; @@ -202,6 +218,10 @@ clutter_canvas_get_property (GObject *gobject, g_value_set_int (value, priv->height); break; + case PROP_SCALE_FACTOR: + g_value_set_float (value, priv->scale_factor); + break; + default: G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec); break; @@ -245,6 +265,19 @@ clutter_canvas_class_init (ClutterCanvasClass *klass) G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS); + /** + * ClutterCanvas:scale-factor: + * + * The height of the canvas. + */ + obj_props[PROP_SCALE_FACTOR] = + g_param_spec_float ("scale-factor", + P_("Scale Factor"), + P_("The Scale factor of the canvas"), + 0.01f, G_MAXFLOAT, + 1.0f, + G_PARAM_READWRITE | + G_PARAM_STATIC_STRINGS); /** * ClutterCanvas::draw: @@ -291,6 +324,7 @@ clutter_canvas_init (ClutterCanvas *self) self->priv->width = -1; self->priv->height = -1; + self->priv->scale_factor = 1.0f; } static void @@ -340,8 +374,8 @@ clutter_canvas_emit_draw (ClutterCanvas *self) priv->dirty = TRUE; - real_width = priv->width; - real_height = priv->height; + real_width = ceilf (priv->width * priv->scale_factor); + real_height = ceilf (priv->height * priv->scale_factor); CLUTTER_NOTE (MISC, "Creating Cairo surface with size %d x %d", priv->width, priv->height); @@ -387,6 +421,10 @@ clutter_canvas_emit_draw (ClutterCanvas *self) mapped_buffer = FALSE; } + cairo_surface_set_device_scale (surface, + priv->scale_factor, + priv->scale_factor); + self->priv->cr = cr = cairo_create (surface); g_signal_emit (self, canvas_signals[DRAW], 0, @@ -448,10 +486,10 @@ clutter_canvas_get_preferred_size (ClutterContent *content, return FALSE; if (width != NULL) - *width = priv->width; + *width = ceilf (priv->width * priv->scale_factor); if (height != NULL) - *height = priv->height; + *height = ceilf (priv->height * priv->scale_factor); return TRUE; } @@ -560,3 +598,48 @@ clutter_canvas_set_size (ClutterCanvas *canvas, return clutter_canvas_invalidate_internal (canvas, width, height); } + +/** + * clutter_canvas_set_scale_factor: + * @canvas: a #ClutterCanvas + * @scale: the integer scaling factor of the canvas + * + * Sets the scaling factor of the @canvas, and invalidates the content. + * + * This function will cause the @canvas to be invalidated only + * if the scale factor of the canvas surface has changed. + */ +void +clutter_canvas_set_scale_factor (ClutterCanvas *canvas, + float scale) +{ + g_return_if_fail (CLUTTER_IS_CANVAS (canvas)); + g_return_if_fail (scale >= 1.0f); + + if (canvas->priv->scale_factor != scale) + { + canvas->priv->scale_factor = scale; + + g_object_freeze_notify (G_OBJECT (canvas)); + clutter_content_invalidate (CLUTTER_CONTENT (canvas)); + g_object_thaw_notify (G_OBJECT (canvas)); + + g_object_notify_by_pspec (G_OBJECT (canvas), obj_props[PROP_SCALE_FACTOR]); + } +} + +/** + * clutter_canvas_get_scale_factor: + * @canvas: a #ClutterCanvas + * + * Gets the scale factor of the @canvas. + * + * Return value: the current @canvas scale factor or -1 if invalid + */ +float +clutter_canvas_get_scale_factor (ClutterCanvas *canvas) +{ + g_return_val_if_fail (CLUTTER_IS_CANVAS (canvas), -1.0f); + + return canvas->priv->scale_factor; +} diff --git a/clutter/clutter/clutter-canvas.h b/clutter/clutter/clutter-canvas.h index 92ddd352c..ed13f49e3 100644 --- a/clutter/clutter/clutter-canvas.h +++ b/clutter/clutter/clutter-canvas.h @@ -97,9 +97,9 @@ gboolean clutter_canvas_set_size (ClutterCanvas * CLUTTER_EXPORT void clutter_canvas_set_scale_factor (ClutterCanvas *canvas, - int scale); + float scale); CLUTTER_EXPORT -int clutter_canvas_get_scale_factor (ClutterCanvas *canvas); +float clutter_canvas_get_scale_factor (ClutterCanvas *canvas); G_END_DECLS