A GLView widget allows for simple GL rendering in elementary environment. GLView hides all the complicated evas_gl details so that the user only has to deal with registering a few callback functions for rendering to a surface using OpenGL APIs.

This widget emits the following signals, besides the ones sent from GLView:

"focused" - when glview has received focus.
"unfocused" - when glview has lost focus.
"language,changed" - the program's language changed

Below is an illustrative example of how to use GLView and and OpenGL to render in elementary environment. glview_example_01_page

Functions
Eina_Bool	elm_glview_resize_policy_set (Elm_Glview *obj, Elm_GLView_Resize_Policy policy)
	Set the resize policy for the glview object.
Eina_Bool	elm_glview_render_policy_set (Elm_Glview *obj, Elm_GLView_Render_Policy policy)
	Set the render policy for the glview object.
Eina_Bool	elm_glview_mode_set (Elm_Glview *obj, Elm_GLView_Mode mode)
	Set the mode of the GLView. Supports alpha, depth, stencil.
Evas_GL_API *	elm_glview_gl_api_get (const Elm_Glview *obj)
	Get the gl api struct for gl rendering.
Evas_GL *	elm_glview_evas_gl_get (const Elm_Glview *obj)
	Get the internal Evas GL attached to this view.
int	elm_glview_rotation_get (const Elm_Glview *obj)
	Get the current GL view's rotation when using direct rendering.
Evas_Object *	elm_glview_add (Evas_Object *parent)
void	elm_glview_changed_set (Evas_Object *obj)
void	elm_glview_size_get (const Evas_Object obj, int w, int *h)
void	elm_glview_size_set (Evas_Object *obj, int w, int h)
void	elm_glview_del_func_set (Evas_Object *obj, Elm_GLView_Func_Cb func)
void	elm_glview_resize_func_set (Evas_Object *obj, Elm_GLView_Func_Cb func)
void	elm_glview_render_func_set (Evas_Object *obj, Elm_GLView_Func_Cb func)

Function Documentation

Evas_Object* elm_glview_add ( Evas_Object * parent )

Add a new glview to the parent

Parameters:

parent The parent object

Returns:: The new object or NULL if it cannot be created

Since :: 2.3

Examples:: glview_example_01.c.

void elm_glview_changed_set ( Evas_Object * obj )

Notifies that there has been changes in the GLView.

Parameters:

obj	The GLView object

Since :: 2.3

Examples:: glview_example_01.c.

void elm_glview_del_func_set	(	Evas_Object *	obj,
		Elm_GLView_Func_Cb	func
	)

Set the delete function that runs in the main loop.

Parameters:

obj	The GLView object
func	The callback function

Since :: 2.3

Examples:: glview_example_01.c.

Evas_GL* elm_glview_evas_gl_get ( const Elm_Glview * obj )

Get the internal Evas GL attached to this view.

Note:: The returned Evas_GL must not be destroyed as it is still owned by the view. But this pointer can be used then to call all the evas_gl_ functions.

Parameters:

[in] obj The object.

Returns:: Evas GL

Since (EFL) :: 1.12

Since :: 2.3

Evas_GL_API* elm_glview_gl_api_get ( const Elm_Glview * obj )

Get the gl api struct for gl rendering.

Parameters:

[in] obj The object.

Returns:: GL API

Since :: 2.3

Examples:: glview_example_01.c.

Eina_Bool elm_glview_mode_set	(	Elm_Glview *	obj,
		Elm_GLView_Mode	mode
	)

Set the mode of the GLView. Supports alpha, depth, stencil.

Direct is a hint for the elm_glview to render directly to the window given that the right conditions are met. Otherwise it falls back to rendering to an offscreen buffer before it gets composited to the window.

Parameters:

[in]	obj	The object.
[in]	mode	The mode Options OR'ed enabling Alpha, Depth, Stencil, Direct.

Returns:: true on success, false otherwise

Since :: 2.3

Examples:: glview_example_01.c.

void elm_glview_render_func_set	(	Evas_Object *	obj,
		Elm_GLView_Func_Cb	func
	)

Set the render function that runs in the main loop.

Parameters:

obj	The GLView object
func	The callback function

Since :: 2.3

Examples:: glview_example_01.c.

Eina_Bool elm_glview_render_policy_set	(	Elm_Glview *	obj,
		Elm_GLView_Render_Policy	policy
	)

Set the render policy for the glview object.

By default, the render policy is set to #ELM_GLVIEW_RENDER_POLICY_ON_DEMAND. This policy is set such that during the render loop, glview is only redrawn if it needs to be redrawn. (i.e. when it is visible) If the policy is set to #ELM_GLVIEWW_RENDER_POLICY_ALWAYS, it redraws regardless of whether it is visible or needs redrawing.

Parameters:

[in]	obj	The object.
[in]	policy	The render policy.

Returns:: true on success, false otherwise

Since :: 2.3

Examples:: glview_example_01.c.

void elm_glview_resize_func_set	(	Evas_Object *	obj,
		Elm_GLView_Func_Cb	func
	)

Set the resize function that gets called when resize happens.

Parameters:

obj	The GLView object
func	The callback function

Since :: 2.3

Examples:: glview_example_01.c.

Eina_Bool elm_glview_resize_policy_set	(	Elm_Glview *	obj,
		Elm_GLView_Resize_Policy	policy
	)

Set the resize policy for the glview object.

By default, the resize policy is set to #ELM_GLVIEW_RESIZE_POLICY_RECREATE. When resize is called it destroys the previous surface and recreates the newly specified size. If the policy is set to #ELM_GLVIEW_RESIZE_POLICY_SCALE, however, glview only scales the image object and not the underlying GL Surface.

Parameters:

[in]	obj	The object.
[in]	policy	The scaling policy.

Returns:: true on success, false otherwise

Since :: 2.3

Examples:: glview_example_01.c.

int elm_glview_rotation_get ( const Elm_Glview * obj )

Get the current GL view's rotation when using direct rendering.

Note:: This rotation can be different from the device orientation. This rotation value must be used in case of direct rendering and should be taken into account by the application when setting the internal rotation matrix for the view.

Parameters:

[in] obj The object.

Returns:: A window rotation in degrees (0, 90, 180 or 270).

Since (EFL) :: 1.12

Since :: 2.4

void elm_glview_size_get	(	const Evas_Object *	obj,
		int *	w,
		int *	h
	)

Gets the size of the GLView.

Parameters:

obj	The GLView object
w	pointer of int width
h	pointer of int height

Since :: 2.3

Examples:: glview_example_01.c.

void elm_glview_size_set	(	Evas_Object *	obj,
		int	w,
		int	h
	)

Sets the size of the GLView.

Parameters:

obj	The GLView object
w	width of GLView
h	height of GLView

Since :: 2.3

Functions

Function Documentation