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d6a6820d99
gtk/gsk/gskrenderer.c
Emmanuele Bassi d6a6820d99 gsk: Fix build without Wayland
2016-10-18 11:49:09 +01:00

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/* GSK - The GTK Scene Kit
*
* Copyright 2016 Endless
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* SECTION:GskRenderer
* @title: GskRenderer
* @Short_desc: Renders a scene
*
* #GskRenderer is a class that renders a scene graph defined via a
* tree of #GskRenderNode instances.
*
* Typically you will use a #GskRenderer instance with a #GdkDrawingContext
* associated to a #GdkWindow, and call gsk_renderer_render() with the
* drawing context and the scene to be rendered.
*
* It is necessary to realize a #GskRenderer instance using gsk_renderer_realize()
* before calling gsk_renderer_render(), in order to create the appropriate
* windowing system resources needed to render the scene.
*/
#include "config.h"
#include "gskrendererprivate.h"
#include "gskdebugprivate.h"
#include "gskglrendererprivate.h"
#include "gskrendernodeprivate.h"
#include "gskenumtypes.h"
#include <graphene-gobject.h>
#include <cairo-gobject.h>
#include <gdk/gdk.h>
#ifdef GDK_WINDOWING_X11
#include <gdk/x11/gdkx.h>
#endif
#ifdef GDK_WINDOWING_WAYLAND
#include <gdk/wayland/gdkwayland.h>
#endif
typedef struct
{
GObject parent_instance;
graphene_rect_t viewport;
graphene_matrix_t modelview;
graphene_matrix_t projection;
GskScalingFilter min_filter;
GskScalingFilter mag_filter;
GdkWindow *window;
GdkDrawingContext *drawing_context;
GskRenderNode *root_node;
GdkDisplay *display;
int scale_factor;
gboolean is_realized : 1;
gboolean auto_clear : 1;
gboolean use_alpha : 1;
} GskRendererPrivate;
G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (GskRenderer, gsk_renderer, G_TYPE_OBJECT)
enum {
PROP_VIEWPORT = 1,
PROP_MODELVIEW,
PROP_PROJECTION,
PROP_MINIFICATION_FILTER,
PROP_MAGNIFICATION_FILTER,
PROP_AUTO_CLEAR,
PROP_USE_ALPHA,
PROP_SCALE_FACTOR,
PROP_WINDOW,
PROP_DISPLAY,
PROP_DRAWING_CONTEXT,
N_PROPS
};
static GParamSpec *gsk_renderer_properties[N_PROPS];
#define GSK_RENDERER_WARN_NOT_IMPLEMENTED_METHOD(obj,method) \
g_critical ("Renderer of type '%s' does not implement GskRenderer::" # method, G_OBJECT_TYPE_NAME (obj))
static gboolean
gsk_renderer_real_realize (GskRenderer *self)
{
GSK_RENDERER_WARN_NOT_IMPLEMENTED_METHOD (self, realize);
return FALSE;
}
static void
gsk_renderer_real_unrealize (GskRenderer *self)
{
GSK_RENDERER_WARN_NOT_IMPLEMENTED_METHOD (self, unrealize);
}
static void
gsk_renderer_real_render (GskRenderer *self,
GskRenderNode *root,
GdkDrawingContext *context)
{
GSK_RENDERER_WARN_NOT_IMPLEMENTED_METHOD (self, render);
}
static void
gsk_renderer_dispose (GObject *gobject)
{
GskRenderer *self = GSK_RENDERER (gobject);
GskRendererPrivate *priv = gsk_renderer_get_instance_private (self);
gsk_renderer_unrealize (self);
g_clear_object (&priv->window);
g_clear_object (&priv->display);
G_OBJECT_CLASS (gsk_renderer_parent_class)->dispose (gobject);
}
static void
gsk_renderer_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GskRenderer *self = GSK_RENDERER (gobject);
GskRendererPrivate *priv = gsk_renderer_get_instance_private (self);
switch (prop_id)
{
case PROP_VIEWPORT:
gsk_renderer_set_viewport (self, g_value_get_boxed (value));
break;
case PROP_MODELVIEW:
gsk_renderer_set_modelview (self, g_value_get_boxed (value));
break;
case PROP_PROJECTION:
gsk_renderer_set_projection (self, g_value_get_boxed (value));
break;
case PROP_MINIFICATION_FILTER:
gsk_renderer_set_scaling_filters (self, g_value_get_enum (value), priv->mag_filter);
break;
case PROP_MAGNIFICATION_FILTER:
gsk_renderer_set_scaling_filters (self, priv->min_filter, g_value_get_enum (value));
break;
case PROP_AUTO_CLEAR:
gsk_renderer_set_auto_clear (self, g_value_get_boolean (value));
break;
case PROP_USE_ALPHA:
gsk_renderer_set_use_alpha (self, g_value_get_boolean (value));
break;
case PROP_SCALE_FACTOR:
gsk_renderer_set_scale_factor (self, g_value_get_int (value));
break;
case PROP_WINDOW:
gsk_renderer_set_window (self, g_value_get_object (value));
break;
case PROP_DISPLAY:
/* Construct-only */
priv->display = g_value_dup_object (value);
break;
}
}
static void
gsk_renderer_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GskRenderer *self = GSK_RENDERER (gobject);
GskRendererPrivate *priv = gsk_renderer_get_instance_private (self);
switch (prop_id)
{
case PROP_VIEWPORT:
g_value_set_boxed (value, &priv->viewport);
break;
case PROP_MODELVIEW:
g_value_set_boxed (value, &priv->modelview);
break;
case PROP_PROJECTION:
g_value_set_boxed (value, &priv->projection);
break;
case PROP_MINIFICATION_FILTER:
g_value_set_enum (value, priv->min_filter);
break;
case PROP_MAGNIFICATION_FILTER:
g_value_set_enum (value, priv->mag_filter);
break;
case PROP_AUTO_CLEAR:
g_value_set_boolean (value, priv->auto_clear);
break;
case PROP_USE_ALPHA:
g_value_set_boolean (value, priv->use_alpha);
break;
case PROP_SCALE_FACTOR:
g_value_set_int (value, priv->scale_factor);
break;
case PROP_WINDOW:
g_value_set_object (value, priv->window);
break;
case PROP_DRAWING_CONTEXT:
g_value_set_object (value, priv->drawing_context);
break;
case PROP_DISPLAY:
g_value_set_object (value, priv->display);
break;
}
}
static void
gsk_renderer_constructed (GObject *gobject)
{
GskRenderer *self = GSK_RENDERER (gobject);
GskRendererPrivate *priv = gsk_renderer_get_instance_private (self);
if (priv->display == NULL)
{
GdkDisplayManager *manager = gdk_display_manager_get ();
priv->display = gdk_display_manager_get_default_display (manager);
g_assert (priv->display != NULL);
}
G_OBJECT_CLASS (gsk_renderer_parent_class)->constructed (gobject);
}
static void
gsk_renderer_class_init (GskRendererClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
klass->realize = gsk_renderer_real_realize;
klass->unrealize = gsk_renderer_real_unrealize;
klass->render = gsk_renderer_real_render;
gobject_class->constructed = gsk_renderer_constructed;
gobject_class->set_property = gsk_renderer_set_property;
gobject_class->get_property = gsk_renderer_get_property;
gobject_class->dispose = gsk_renderer_dispose;
/**
* GskRenderer:viewport:
*
* The visible area used by the #GskRenderer to render its contents.
*
* Since: 3.22
*/
gsk_renderer_properties[PROP_VIEWPORT] =
g_param_spec_boxed ("viewport",
"Viewport",
"The visible area used by the renderer",
GRAPHENE_TYPE_RECT,
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS |
G_PARAM_EXPLICIT_NOTIFY);
/**
* GskRenderer:modelview:
*
* The initial modelview matrix used by the #GskRenderer.
*
* If set to %NULL, the identity matrix:
*
* |[<!-- language="plain"
* | 1.0, 0.0, 0.0, 0.0 |
* | 0.0, 1.0, 0.0, 0.0 |
* | 0.0, 0.0, 1.0, 0.0 |
* | 0.0, 0.0, 0.0, 1.0 |
* ]|
*
* Is used instead.
*
* Since: 3.22
*/
gsk_renderer_properties[PROP_MODELVIEW] =
g_param_spec_boxed ("modelview",
"Modelview",
"The modelview matrix used by the renderer",
GRAPHENE_TYPE_MATRIX,
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS |
G_PARAM_EXPLICIT_NOTIFY);
/**
* GskRenderer:projection:
*
* The projection matrix used by the #GskRenderer.
*
* If set to %NULL, the identity matrix:
*
* |[<!-- language="plain"
* | 1.0, 0.0, 0.0, 0.0 |
* | 0.0, 1.0, 0.0, 0.0 |
* | 0.0, 0.0, 1.0, 0.0 |
* | 0.0, 0.0, 0.0, 1.0 |
* ]|
*
* Is used instead.
*
* Since: 3.22
*/
gsk_renderer_properties[PROP_PROJECTION] =
g_param_spec_boxed ("projection",
"Projection",
"The projection matrix used by the renderer",
GRAPHENE_TYPE_MATRIX,
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS |
G_PARAM_EXPLICIT_NOTIFY);
/**
* GskRenderer:minification-filter:
*
* The filter to be used when scaling textures down.
*
* See also: gsk_renderer_set_scaling_filters()
*
* Since: 3.22
*/
gsk_renderer_properties[PROP_MINIFICATION_FILTER] =
g_param_spec_enum ("minification-filter",
"Minification Filter",
"The minification filter used by the renderer for texture targets",
GSK_TYPE_SCALING_FILTER,
GSK_SCALING_FILTER_LINEAR,
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS |
G_PARAM_EXPLICIT_NOTIFY);
/**
* GskRenderer:magnification-filter:
*
* The filter to be used when scaling textures up.
*
* See also: gsk_renderer_set_scaling_filters()
*
* Since: 3.22
*/
gsk_renderer_properties[PROP_MAGNIFICATION_FILTER] =
g_param_spec_enum ("magnification-filter",
"Magnification Filter",
"The magnification filter used by the renderer for texture targets",
GSK_TYPE_SCALING_FILTER,
GSK_SCALING_FILTER_LINEAR,
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS |
G_PARAM_EXPLICIT_NOTIFY);
/**
* GskRenderer:auto-clear:
*
* Automatically clear the rendering surface when rendering.
*
* Setting this property to %FALSE assumes that the owner of the
* rendering surface will have cleared it prior to calling
* gsk_renderer_render().
*
* Since: 3.22
*/
gsk_renderer_properties[PROP_AUTO_CLEAR] =
g_param_spec_boolean ("auto-clear",
"Auto Clear",
"Automatically clears the rendering target on render",
TRUE,
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS |
G_PARAM_EXPLICIT_NOTIFY);
/**
* GskRenderer:display:
*
* The #GdkDisplay used by the #GskRenderer.
*
* Since: 3.22
*/
gsk_renderer_properties[PROP_DISPLAY] =
g_param_spec_object ("display",
"Display",
"The GdkDisplay object used by the renderer",
GDK_TYPE_DISPLAY,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS);
gsk_renderer_properties[PROP_WINDOW] =
g_param_spec_object ("window",
"Window",
"The window associated to the renderer",
GDK_TYPE_WINDOW,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS);
/**
* GskRenderer:scale-factor:
*
* The scale factor used when rendering.
*
* Since: 3.22
*/
gsk_renderer_properties[PROP_SCALE_FACTOR] =
g_param_spec_int ("scale-factor",
"Scale Factor",
"The scaling factor of the renderer",
1, G_MAXINT,
1,
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS |
G_PARAM_EXPLICIT_NOTIFY);
/**
* GskRenderer:drawing-context:
*
* The drawing context used when rendering.
*
* Since: 3.22
*/
gsk_renderer_properties[PROP_DRAWING_CONTEXT] =
g_param_spec_object ("drawing-context",
"Drawing Context",
"The drawing context used by the renderer",
GDK_TYPE_DRAWING_CONTEXT,
G_PARAM_READABLE |
G_PARAM_STATIC_STRINGS);
/**
* GskRenderer:use-alpha:
*
* Whether the #GskRenderer should use the alpha channel when rendering.
*
* Since: 3.22
*/
gsk_renderer_properties[PROP_USE_ALPHA] =
g_param_spec_boolean ("use-alpha",
"Use Alpha",
"Whether the renderer should use the alpha channel when rendering",
FALSE,
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS |
G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_properties (gobject_class, N_PROPS, gsk_renderer_properties);
}
static void
gsk_renderer_init (GskRenderer *self)
{
GskRendererPrivate *priv = gsk_renderer_get_instance_private (self);
graphene_matrix_init_identity (&priv->modelview);
graphene_matrix_init_identity (&priv->projection);
priv->auto_clear = TRUE;
priv->scale_factor = 1;
priv->min_filter = GSK_SCALING_FILTER_LINEAR;
priv->mag_filter = GSK_SCALING_FILTER_LINEAR;
}
/**
* gsk_renderer_set_viewport:
* @renderer: a #GskRenderer
* @viewport: (nullable): the viewport rectangle used by the @renderer
*
* Sets the visible rectangle to be used as the viewport for
* the rendering.
*
* Since: 3.22
*/
void
gsk_renderer_set_viewport (GskRenderer *renderer,
const graphene_rect_t *viewport)
{
GskRendererPrivate *priv = gsk_renderer_get_instance_private (renderer);
g_return_if_fail (GSK_IS_RENDERER (renderer));
if (viewport == NULL)
{
graphene_rect_init (&priv->viewport, 0.f, 0.f, 0.f, 0.f);
g_object_notify_by_pspec (G_OBJECT (renderer), gsk_renderer_properties[PROP_VIEWPORT]);
return;
}
if (graphene_rect_equal (viewport, &priv->viewport))
return;
graphene_rect_init_from_rect (&priv->viewport, viewport);
g_object_notify_by_pspec (G_OBJECT (renderer), gsk_renderer_properties[PROP_VIEWPORT]);
}
/**
* gsk_renderer_get_viewport:
* @renderer: a #GskRenderer
* @viewport: (out caller-allocates): return location for the viewport rectangle
*
* Retrieves the viewport of the #GskRenderer.
*
* Since: 3.22
*/
void
gsk_renderer_get_viewport (GskRenderer *renderer,
graphene_rect_t *viewport)
{
GskRendererPrivate *priv = gsk_renderer_get_instance_private (renderer);
g_return_if_fail (GSK_IS_RENDERER (renderer));
g_return_if_fail (viewport != NULL);
graphene_rect_init_from_rect (viewport, &priv->viewport);
}
/**
* gsk_renderer_set_modelview:
* @renderer: a #GskRenderer
* @modelview: the modelview matrix used by the @renderer
*
* Sets the initial modelview matrix used by the #GskRenderer.
*
* A modelview matrix defines the initial transformation imposed
* on the scene graph.
*
* Since: 3.22
*/
void
gsk_renderer_set_modelview (GskRenderer *renderer,
const graphene_matrix_t *modelview)
{
GskRendererPrivate *priv = gsk_renderer_get_instance_private (renderer);
g_return_if_fail (GSK_IS_RENDERER (renderer));
if (modelview == NULL)
graphene_matrix_init_identity (&priv->modelview);
else
graphene_matrix_init_from_matrix (&priv->modelview, modelview);
g_object_notify_by_pspec (G_OBJECT (renderer), gsk_renderer_properties[PROP_MODELVIEW]);
}
/**
* gsk_renderer_get_modelview:
* @renderer: a #GskRenderer
* @modelview: (out caller-allocates): return location for the modelview matrix
*
* Retrieves the modelview matrix used by the #GskRenderer.
*
* Since: 3.22
*/
void
gsk_renderer_get_modelview (GskRenderer *renderer,
graphene_matrix_t *modelview)
{
GskRendererPrivate *priv = gsk_renderer_get_instance_private (renderer);
g_return_if_fail (GSK_IS_RENDERER (renderer));
g_return_if_fail (modelview != NULL);
graphene_matrix_init_from_matrix (modelview, &priv->modelview);
}
/**
* gsk_renderer_set_projection:
* @renderer: a #GskRenderer
* @projection: the projection matrix used by the @renderer
*
* Sets the projection matrix used by the #GskRenderer.
*
* Since: 3.22
*/
void
gsk_renderer_set_projection (GskRenderer *renderer,
const graphene_matrix_t *projection)
{
GskRendererPrivate *priv = gsk_renderer_get_instance_private (renderer);
g_return_if_fail (GSK_IS_RENDERER (renderer));
if (projection == NULL)
graphene_matrix_init_identity (&priv->projection);
else
graphene_matrix_init_from_matrix (&priv->projection, projection);
g_object_notify_by_pspec (G_OBJECT (renderer), gsk_renderer_properties[PROP_PROJECTION]);
}
/**
* gsk_renderer_get_projection:
* @renderer: a #GskRenderer
* @projection: (out caller-allocates): return location for the projection matrix
*
* Retrieves the projection matrix used by the #GskRenderer.
*
* Since: 3.22
*/
void
gsk_renderer_get_projection (GskRenderer *renderer,
graphene_matrix_t *projection)
{
GskRendererPrivate *priv = gsk_renderer_get_instance_private (renderer);
g_return_if_fail (GSK_IS_RENDERER (renderer));
g_return_if_fail (projection != NULL);
graphene_matrix_init_from_matrix (projection, &priv->projection);
}
/**
* gsk_renderer_set_scaling_filters:
* @renderer: a #GskRenderer
* @min_filter: the minification scaling filter
* @mag_filter: the magnification scaling filter
*
* Sets the scaling filters to be applied when scaling textures
* up and down.
*
* Since: 3.22
*/
void
gsk_renderer_set_scaling_filters (GskRenderer *renderer,
GskScalingFilter min_filter,
GskScalingFilter mag_filter)
{
GskRendererPrivate *priv = gsk_renderer_get_instance_private (renderer);
GObject *gobject;
g_return_if_fail (GSK_IS_RENDERER (renderer));
gobject = G_OBJECT (renderer);
g_object_freeze_notify (gobject);
if (priv->min_filter != min_filter)
{
priv->min_filter = min_filter;
g_object_notify_by_pspec (gobject, gsk_renderer_properties[PROP_MINIFICATION_FILTER]);
}
if (priv->mag_filter != mag_filter)
{
priv->mag_filter = mag_filter;
g_object_notify_by_pspec (gobject, gsk_renderer_properties[PROP_MAGNIFICATION_FILTER]);
}
g_object_thaw_notify (gobject);
}
/**
* gsk_renderer_get_scaling_filters:
* @renderer: a #GskRenderer
* @min_filter: (out) (nullable): return location for the minification filter
* @mag_filter: (out) (nullable): return location for the magnification filter
*
* Retrieves the minification and magnification filters used by the #GskRenderer.
*
* Since: 3.22
*/
void
gsk_renderer_get_scaling_filters (GskRenderer *renderer,
GskScalingFilter *min_filter,
GskScalingFilter *mag_filter)
{
GskRendererPrivate *priv = gsk_renderer_get_instance_private (renderer);
g_return_if_fail (GSK_IS_RENDERER (renderer));
if (min_filter != NULL)
*min_filter = priv->min_filter;
if (mag_filter != NULL)
*mag_filter = priv->mag_filter;
}
void
gsk_renderer_set_scale_factor (GskRenderer *renderer,
int scale_factor)
{
GskRendererPrivate *priv = gsk_renderer_get_instance_private (renderer);
g_return_if_fail (GSK_IS_RENDERER (renderer));
if (priv->scale_factor != scale_factor)
{
priv->scale_factor = scale_factor;
g_object_notify_by_pspec (G_OBJECT (renderer), gsk_renderer_properties[PROP_SCALE_FACTOR]);
}
}
int
gsk_renderer_get_scale_factor (GskRenderer *renderer)
{
GskRendererPrivate *priv = gsk_renderer_get_instance_private (renderer);
g_return_val_if_fail (GSK_IS_RENDERER (renderer), 1);
return priv->scale_factor;
}
void
gsk_renderer_set_window (GskRenderer *renderer,
GdkWindow *window)
{
GskRendererPrivate *priv = gsk_renderer_get_instance_private (renderer);
g_return_if_fail (GSK_IS_RENDERER (renderer));
g_return_if_fail (!priv->is_realized);
g_return_if_fail (window == NULL || GDK_IS_WINDOW (window));
if (g_set_object (&priv->window, window))
g_object_notify_by_pspec (G_OBJECT (renderer), gsk_renderer_properties[PROP_WINDOW]);
}
/**
* gsk_renderer_get_window:
* @renderer: a #GskRenderer
*
* Retrieves the #GdkWindow set using gsk_renderer_set_window().
*
* Returns: (transfer none) (nullable): a #GdkWindow
*
* Since: 3.22
*/
GdkWindow *
gsk_renderer_get_window (GskRenderer *renderer)
{
GskRendererPrivate *priv = gsk_renderer_get_instance_private (renderer);
g_return_val_if_fail (GSK_IS_RENDERER (renderer), NULL);
return priv->window;
}
/*< private >
* gsk_renderer_get_root_node:
* @renderer: a #GskRenderer
*
* Retrieves the #GskRenderNode used by @renderer.
*
* Returns: (transfer none) (nullable): a #GskRenderNode
*/
GskRenderNode *
gsk_renderer_get_root_node (GskRenderer *renderer)
{
GskRendererPrivate *priv = gsk_renderer_get_instance_private (renderer);
g_return_val_if_fail (GSK_IS_RENDERER (renderer), NULL);
return priv->root_node;
}
/*< private >
* gsk_renderer_get_drawing_context:
* @renderer: a #GskRenderer
*
* Retrieves the #GdkDrawingContext used by @renderer.
*
* Returns: (transfer none) (nullable): a #GdkDrawingContext
*/
GdkDrawingContext *
gsk_renderer_get_drawing_context (GskRenderer *renderer)
{
GskRendererPrivate *priv = gsk_renderer_get_instance_private (renderer);
g_return_val_if_fail (GSK_IS_RENDERER (renderer), NULL);
return priv->drawing_context;
}
/**
* gsk_renderer_get_display:
* @renderer: a #GskRenderer
*
* Retrieves the #GdkDisplay used when creating the #GskRenderer.
*
* Returns: (transfer none): a #GdkDisplay
*
* Since: 3.22
*/
GdkDisplay *
gsk_renderer_get_display (GskRenderer *renderer)
{
GskRendererPrivate *priv = gsk_renderer_get_instance_private (renderer);
g_return_val_if_fail (GSK_IS_RENDERER (renderer), NULL);
return priv->display;
}
/*< private >
* gsk_renderer_is_realized:
* @renderer: a #GskRenderer
*
* Checks whether the @renderer is realized or not.
*
* Returns: %TRUE if the #GskRenderer was realized, and %FALSE otherwise
*
* Since: 3.22
*/
gboolean
gsk_renderer_is_realized (GskRenderer *renderer)
{
GskRendererPrivate *priv = gsk_renderer_get_instance_private (renderer);
g_return_val_if_fail (GSK_IS_RENDERER (renderer), FALSE);
return priv->is_realized;
}
/**
* gsk_renderer_realize:
* @renderer: a #GskRenderer
*
* Creates the resources needed by the @renderer to render the scene
* graph.
*
* Since: 3.22
*/
gboolean
gsk_renderer_realize (GskRenderer *renderer)
{
GskRendererPrivate *priv = gsk_renderer_get_instance_private (renderer);
g_return_val_if_fail (GSK_IS_RENDERER (renderer), FALSE);
if (priv->is_realized)
return TRUE;
priv->is_realized = GSK_RENDERER_GET_CLASS (renderer)->realize (renderer);
return priv->is_realized;
}
/**
* gsk_renderer_unrealize:
* @renderer: a #GskRenderer
*
* Releases all the resources created by gsk_renderer_realize().
*
* Since: 3.22
*/
void
gsk_renderer_unrealize (GskRenderer *renderer)
{
GskRendererPrivate *priv = gsk_renderer_get_instance_private (renderer);
g_return_if_fail (GSK_IS_RENDERER (renderer));
if (!priv->is_realized)
return;
GSK_RENDERER_GET_CLASS (renderer)->unrealize (renderer);
priv->is_realized = FALSE;
}
/**
* gsk_renderer_render:
* @renderer: a #GskRenderer
* @root: a #GskRenderNode
* @context: a #GdkDrawingContext
*
* Renders the scene graph, described by a tree of #GskRenderNode instances,
* using the given #GdkDrawingContext.
*
* The @renderer will acquire a reference on the #GskRenderNode tree while
* the rendering is in progress, and will make the tree immutable.
*
* Since: 3.22
*/
void
gsk_renderer_render (GskRenderer *renderer,
GskRenderNode *root,
GdkDrawingContext *context)
{
GskRendererPrivate *priv = gsk_renderer_get_instance_private (renderer);
g_return_if_fail (GSK_IS_RENDERER (renderer));
g_return_if_fail (priv->is_realized);
g_return_if_fail (GSK_IS_RENDER_NODE (root));
g_return_if_fail (GDK_IS_DRAWING_CONTEXT (context));
g_return_if_fail (priv->drawing_context == NULL);
g_return_if_fail (priv->root_node == NULL);
priv->drawing_context = g_object_ref (context);
priv->root_node = gsk_render_node_ref (root);
gsk_render_node_make_immutable (priv->root_node);
GSK_RENDERER_GET_CLASS (renderer)->render (renderer, root, context);
g_clear_object (&priv->drawing_context);
g_clear_pointer (&priv->root_node, gsk_render_node_unref);
}
/**
* gsk_renderer_set_auto_clear:
* @renderer: a #GskRenderer
* @clear: whether the target surface should be cleared prior
* to rendering to it
*
* Sets whether the target surface used by @renderer should be cleared
* before rendering.
*
* If you pass a custom surface to gsk_renderer_set_surface(), you may
* want to manage the clearing manually; this is possible by passing
* %FALSE to this function.
*
* Since: 3.22
*/
void
gsk_renderer_set_auto_clear (GskRenderer *renderer,
gboolean clear)
{
GskRendererPrivate *priv = gsk_renderer_get_instance_private (renderer);
g_return_if_fail (GSK_IS_RENDERER (renderer));
clear = !!clear;
if (clear == priv->auto_clear)
return;
priv->auto_clear = clear;
g_object_notify_by_pspec (G_OBJECT (renderer), gsk_renderer_properties[PROP_AUTO_CLEAR]);
}
/**
* gsk_renderer_get_auto_clear:
* @renderer: a #GskRenderer
*
* Retrieves the value set using gsk_renderer_set_auto_clear().
*
* Returns: %TRUE if the target surface should be cleared prior to rendering
*
* Since: 3.22
*/
gboolean
gsk_renderer_get_auto_clear (GskRenderer *renderer)
{
GskRendererPrivate *priv = gsk_renderer_get_instance_private (renderer);
g_return_val_if_fail (GSK_IS_RENDERER (renderer), FALSE);
return priv->auto_clear;
}
/**
* gsk_renderer_set_use_alpha:
* @renderer: a #GskRenderer
* @use_alpha: whether to use the alpha channel of the target surface or not
*
* Sets whether the @renderer should use the alpha channel of the target surface
* or not.
*
* Since: 3.22
*/
void
gsk_renderer_set_use_alpha (GskRenderer *renderer,
gboolean use_alpha)
{
GskRendererPrivate *priv = gsk_renderer_get_instance_private (renderer);
g_return_if_fail (GSK_IS_RENDERER (renderer));
g_return_if_fail (!priv->is_realized);
use_alpha = !!use_alpha;
if (use_alpha == priv->use_alpha)
return;
priv->use_alpha = use_alpha;
g_object_notify_by_pspec (G_OBJECT (renderer), gsk_renderer_properties[PROP_USE_ALPHA]);
}
/**
* gsk_renderer_get_use_alpha:
* @renderer: a #GskRenderer
*
* Retrieves the value set using gsk_renderer_set_use_alpha().
*
* Returns: %TRUE if the target surface should use an alpha channel
*
* Since: 3.22
*/
gboolean
gsk_renderer_get_use_alpha (GskRenderer *renderer)
{
GskRendererPrivate *priv = gsk_renderer_get_instance_private (renderer);
g_return_val_if_fail (GSK_IS_RENDERER (renderer), FALSE);
return priv->use_alpha;
}
/**
* gsk_renderer_get_for_display:
* @display: a #GdkDisplay
*
* Creates an appropriate #GskRenderer instance for the given @display.
*
* Returns: (transfer full) (nullable): a #GskRenderer
*
* Since: 3.22
*/
GskRenderer *
gsk_renderer_get_for_display (GdkDisplay *display)
{
static const char *use_software;
GType renderer_type = G_TYPE_INVALID;
if (use_software == NULL)
{
use_software = g_getenv ("GSK_USE_SOFTWARE");
if (use_software == NULL)
use_software = "0";
}
if (use_software[0] != '0')
return NULL;
#ifdef GDK_WINDOWING_X11
if (GDK_IS_X11_DISPLAY (display))
renderer_type = GSK_TYPE_GL_RENDERER;
else
#endif
#ifdef GDK_WINDOWING_WAYLAND
if (GDK_IS_WAYLAND_DISPLAY (display))
renderer_type = GSK_TYPE_GL_RENDERER;
else
#endif
return NULL;
GSK_NOTE (RENDERER, g_print ("Creating renderer of type '%s' for display '%s'\n",
g_type_name (renderer_type),
G_OBJECT_TYPE_NAME (display)));
g_assert (renderer_type != G_TYPE_INVALID);
return g_object_new (renderer_type, "display", display, NULL);
}
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