GLContextExt

gstreamer_gl::prelude

Trait GLContextExt 

Source 
pub trait GLContextExt: IsA<GLContext> + 'static {

Show 25 methods    // Provided methods
    fn activate(&self, activate: bool) -> Result<(), BoolError> { ... }
    fn can_share(&self, other_context: &impl IsA<GLContext>) -> bool { ... }
    fn check_feature(&self, feature: &str) -> bool { ... }
    fn check_framebuffer_status(&self, fbo_target: u32) -> bool { ... }
    fn check_gl_version(&self, api: GLAPI, maj: i32, min: i32) -> bool { ... }
    fn clear_framebuffer(&self) { ... }
    fn clear_shader(&self) { ... }
    fn create(
        &self,
        other_context: Option<&impl IsA<GLContext>>,
    ) -> Result<(), Error> { ... }
    fn destroy(&self) { ... }
    fn fill_info(&self) -> Result<(), Error> { ... }
    fn config(&self) -> Option<Structure> { ... }
    fn display(&self) -> GLDisplay { ... }
    fn gl_api(&self) -> GLAPI { ... }
    fn gl_platform(&self) -> GLPlatform { ... }
    fn gl_platform_version(&self) -> (i32, i32) { ... }
    fn gl_version(&self) -> (i32, i32) { ... }
    fn window(&self) -> Option<GLWindow> { ... }
    fn is_shared(&self) -> bool { ... }
    fn request_config(&self, gl_config: Option<Structure>) -> bool { ... }
    fn set_shared_with(&self, share: &impl IsA<GLContext>) { ... }
    fn set_window(&self, window: impl IsA<GLWindow>) -> Result<(), BoolError> { ... }
    fn supports_glsl_profile_version(
        &self,
        version: GLSLVersion,
        profile: GLSLProfile,
    ) -> bool { ... }
    fn supports_precision(
        &self,
        version: GLSLVersion,
        profile: GLSLProfile,
    ) -> bool { ... }
    fn supports_precision_highp(
        &self,
        version: GLSLVersion,
        profile: GLSLProfile,
    ) -> bool { ... }
    fn swap_buffers(&self) { ... }

}
Expand description

Trait containing all GLContext methods.

§Implementors

GLContext

Provided Methods§

Source

fn activate(&self, activate: bool) -> Result<(), BoolError>

(De)activate the OpenGL context represented by this self.

In OpenGL terms, calls eglMakeCurrent or similar with this context and the currently set window. See set_window() for details.

§activate

true to activate, false to deactivate

§Returns

Whether the activation succeeded

Source

fn can_share(&self, other_context: &impl IsA<GLContext>) -> bool

Note: This will always fail for two wrapped GLContext’s

§other_context

another GLContext

§Returns

whether self and other_context are able to share OpenGL resources.

Source

fn check_feature(&self, feature: &str) -> bool

Check for an OpenGL feature being supported.

Note: Most features require that the context be created before it is possible to determine their existence and so will fail if that is not the case.

§feature

a platform specific feature

§Returns

Whether feature is supported by self

Source

fn check_framebuffer_status(&self, fbo_target: u32) -> bool

Must be called with self current.

§fbo_target

the GL value of the framebuffer target, GL_FRAMEBUFFER, GL_READ_FRAMEBUFFER, GL_DRAW_FRAMEBUFFER

§Returns

whether whether the current framebuffer is complete

Source

fn check_gl_version(&self, api: GLAPI, maj: i32, min: i32) -> bool

§api

api type required

§maj

major version required

§min

minor version required

§Returns

whether OpenGL context implements the required api and specified version.

Source

fn clear_framebuffer(&self)

Unbind the current framebuffer

Source

fn clear_shader(&self)

Clear’s the currently set shader from the GL state machine.

Note: must be called in the GL thread.

Source

fn create( &self, other_context: Option<&impl IsA<GLContext>>, ) -> Result<(), Error>

Creates an OpenGL context with the specified other_context as a context to share shareable OpenGL objects with. See the OpenGL specification for what is shared between OpenGL contexts.

Since 1.20, the configuration can be overriden with the environment variable GST_GL_CONFIG which is a stringified gst::Structure as would be returned from config(). If GST_GL_CONFIG is not set, then the config will be chosen from other_context by calling config() on other_context. Otherwise, a default configuration is used.

Calling request_config()) before calling create() will override the config from other_context but will not override the GST_GL_CONFIG environment variable.

If an error occurs, and error is not None, then error will contain details of the error and false will be returned.

Should only be called once.

§other_context

a GLContext to share OpenGL objects with

§Returns

whether the context could successfully be created

Source

fn destroy(&self)

Source

fn fill_info(&self) -> Result<(), Error>

Fills self’s info (version, extensions, vtable, etc) from the GL context in the current thread. Typically used with wrapped contexts to allow wrapped contexts to be used as regular GLContext’s.

Source

fn config(&self) -> Option<Structure>

Retrieve the OpenGL configuration for this context. The context must have been successfully created for this function to return a valid value.

Not all implementations currently support retrieving the config and will return None when not supported.

§Returns

the configuration chosen for this OpenGL context.

Source

fn display(&self) -> GLDisplay

§Returns

the GLDisplay associated with this self

Source

fn gl_api(&self) -> GLAPI

Get the currently enabled OpenGL api.

The currently available API may be limited by the GLDisplay in use and/or the GLWindow chosen.

§Returns

the available OpenGL api

Source

fn gl_platform(&self) -> GLPlatform

Gets the OpenGL platform that used by self.

§Returns

The platform specific backing OpenGL context

Source

fn gl_platform_version(&self) -> (i32, i32)

Get the version of the OpenGL platform (GLX, EGL, etc) used. Only valid after a call to create().

§Returns
§major

return for the major version

§minor

return for the minor version

Source

fn gl_version(&self) -> (i32, i32)

Returns the OpenGL version implemented by self. See gl_api() for retrieving the OpenGL api implemented by self.

§Returns
§maj

resulting major version

§min

resulting minor version

Source

fn window(&self) -> Option<GLWindow>

§Returns

the currently set window

Source

fn is_shared(&self) -> bool

§Returns

Whether the GLContext has been shared with another GLContext

Source

fn request_config(&self, gl_config: Option<Structure>) -> bool

Set the OpenGL configuration for this context. The context must not have been created for this function to succeed. Setting a None config has the affect of removing any specific configuration request.

Not all implementations currently support retrieving the config and this function will return FALSE when not supported.

Note that calling this function may cause a subsequent create() to fail if config could not be matched with the platform-specific configuration.

Note that the actual config used may be differ from the requested values.

§gl_config

a configuration structure for configuring the OpenGL context

§Returns

whether gl_config could be successfully set on self

Source

fn set_shared_with(&self, share: &impl IsA<GLContext>)

Will internally set self as shared with share

§share

another GLContext

Source

fn set_window(&self, window: impl IsA<GLWindow>) -> Result<(), BoolError>

Set’s the current window on self to window. The window can only be changed before create() has been called and the window is not already running.

§window

a GLWindow

§Returns

Whether the window was successfully updated

Source

fn supports_glsl_profile_version( &self, version: GLSLVersion, profile: GLSLProfile, ) -> bool

§version

a GLSLVersion

§profile

a GLSLProfile

§Returns

Whether self supports the combination of version with profile

Source

fn supports_precision(&self, version: GLSLVersion, profile: GLSLProfile) -> bool

§version

a GLSLVersion

§profile

a GLSLProfile

§Returns

whether self supports the ‘precision’ specifier in GLSL shaders

Source

fn supports_precision_highp( &self, version: GLSLVersion, profile: GLSLProfile, ) -> bool

§version

a GLSLVersion

§profile

a GLSLProfile

§Returns

whether self supports the ‘precision highp’ specifier in GLSL shaders

Source

fn swap_buffers(&self)

Swap the front and back buffers on the window attached to self. This will display the frame on the next refresh cycle.

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors§