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backends: Add MetaStageView::transform property
This property updates the ClutterStageView pipeline, so the texture is applied with the corresponding transform. https://bugzilla.gnome.org/show_bug.cgi?id=745079
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@ -27,6 +27,7 @@ enum
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PROP_0,
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PROP_MONITOR_INFO,
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PROP_TRANSFORM,
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PROP_LAST
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};
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@ -37,6 +38,7 @@ struct _MetaRendererView
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{
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ClutterStageViewCogl parent;
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MetaMonitorTransform transform;
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MetaMonitorInfo *monitor_info;
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};
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@ -49,6 +51,72 @@ meta_renderer_view_get_monitor_info (MetaRendererView *view)
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return view->monitor_info;
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}
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static void
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meta_renderer_view_get_offscreen_transformation_matrix (ClutterStageView *view,
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CoglMatrix *matrix)
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{
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MetaRendererView *renderer_view = META_RENDERER_VIEW (view);
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cogl_matrix_init_identity (matrix);
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switch (renderer_view->transform)
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{
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case META_MONITOR_TRANSFORM_NORMAL:
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break;
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case META_MONITOR_TRANSFORM_90:
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cogl_matrix_rotate (matrix, 90, 0, 0, 1);
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cogl_matrix_translate (matrix, 0, -1, 0);
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break;
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case META_MONITOR_TRANSFORM_180:
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cogl_matrix_rotate (matrix, 180, 0, 0, 1);
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cogl_matrix_translate (matrix, -1, -1, 0);
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break;
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case META_MONITOR_TRANSFORM_270:
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cogl_matrix_rotate (matrix, 270, 0, 0, 1);
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cogl_matrix_translate (matrix, -1, 0, 0);
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break;
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case META_MONITOR_TRANSFORM_FLIPPED:
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cogl_matrix_scale (matrix, -1, 1, 1);
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cogl_matrix_translate (matrix, -1, 0, 0);
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break;
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case META_MONITOR_TRANSFORM_FLIPPED_90:
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cogl_matrix_scale (matrix, -1, 1, 1);
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cogl_matrix_rotate (matrix, 90, 0, 0, 1);
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break;
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case META_MONITOR_TRANSFORM_FLIPPED_180:
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cogl_matrix_scale (matrix, -1, 1, 1);
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cogl_matrix_rotate (matrix, 180, 0, 0, 1);
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cogl_matrix_translate (matrix, 0, -1, 0);
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break;
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case META_MONITOR_TRANSFORM_FLIPPED_270:
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cogl_matrix_scale (matrix, -1, 1, 1);
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cogl_matrix_rotate (matrix, 270, 0, 0, 1);
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cogl_matrix_translate (matrix, -1, -1, 0);
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break;
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}
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}
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static void
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meta_renderer_view_setup_offscreen_blit_pipeline (ClutterStageView *view,
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CoglPipeline *pipeline)
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{
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CoglMatrix matrix;
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meta_renderer_view_get_offscreen_transformation_matrix (view, &matrix);
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cogl_pipeline_set_layer_matrix (pipeline, 0, &matrix);
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}
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static void
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meta_renderer_view_set_transform (MetaRendererView *view,
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MetaMonitorTransform transform)
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{
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if (view->transform == transform)
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return;
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view->transform = transform;
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clutter_stage_view_invalidate_offscreen_blit_pipeline (CLUTTER_STAGE_VIEW (view));
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}
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static void
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meta_renderer_view_get_property (GObject *object,
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guint prop_id,
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@ -62,6 +130,9 @@ meta_renderer_view_get_property (GObject *object,
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case PROP_MONITOR_INFO:
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g_value_set_pointer (value, view->monitor_info);
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break;
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case PROP_TRANSFORM:
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g_value_set_uint (value, view->transform);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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@ -81,6 +152,9 @@ meta_renderer_view_set_property (GObject *object,
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case PROP_MONITOR_INFO:
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view->monitor_info = g_value_get_pointer (value);
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break;
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case PROP_TRANSFORM:
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meta_renderer_view_set_transform (view, g_value_get_uint (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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@ -96,6 +170,12 @@ static void
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meta_renderer_view_class_init (MetaRendererViewClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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ClutterStageViewClass *view_class = CLUTTER_STAGE_VIEW_CLASS (klass);
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view_class->setup_offscreen_blit_pipeline =
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meta_renderer_view_setup_offscreen_blit_pipeline;
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view_class->get_offscreen_transformation_matrix =
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meta_renderer_view_get_offscreen_transformation_matrix;
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object_class->get_property = meta_renderer_view_get_property;
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object_class->set_property = meta_renderer_view_set_property;
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@ -107,6 +187,16 @@ meta_renderer_view_class_init (MetaRendererViewClass *klass)
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G_PARAM_READWRITE |
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G_PARAM_STATIC_STRINGS |
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G_PARAM_CONSTRUCT_ONLY);
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obj_props[PROP_TRANSFORM] =
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g_param_spec_uint ("transform",
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"Transform",
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"Transform to apply to the view",
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META_MONITOR_TRANSFORM_NORMAL,
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META_MONITOR_TRANSFORM_FLIPPED_270,
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META_MONITOR_TRANSFORM_NORMAL,
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G_PARAM_READWRITE |
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G_PARAM_CONSTRUCT_ONLY |
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G_PARAM_STATIC_STRINGS);
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g_object_class_install_properties (object_class, PROP_LAST, obj_props);
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}
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