Struct retro_hw_render_callback 

#[repr(C)]
pub struct retro_hw_render_callback {
    pub context_type: retro_hw_context_type,
    pub context_reset: Option<unsafe extern "C" fn()>,
    pub get_current_framebuffer: Option<unsafe extern "C" fn() -> usize>,
    pub get_proc_address: Option<unsafe extern "C" fn(*const i8) -> Option<unsafe extern "C" fn()>>,
    pub depth: bool,
    pub stencil: bool,
    pub bottom_left_origin: bool,
    pub version_major: u32,
    pub version_minor: u32,
    pub cache_context: bool,
    pub context_destroy: Option<unsafe extern "C" fn()>,
    pub debug_context: bool,
}

Fields

context_type: retro_hw_context_type

Which API to use. Set by libretro core.

context_reset: Option<unsafe extern "C" fn()>

Called when a context has been created or when it has been reset. An OpenGL context is only valid after context_reset() has been called.

When context_reset is called, OpenGL resources in the libretro implementation are guaranteed to be invalid.

It is possible that context_reset is called multiple times during an application lifecycle. If context_reset is called without any notification (context_destroy), the OpenGL context was lost and resources should just be recreated without any attempt to “free” old resources.

get_current_framebuffer: Option<unsafe extern "C" fn() -> usize>

Set by frontend. TODO: This is rather obsolete. The frontend should not be providing preallocated framebuffers.

get_proc_address: Option<unsafe extern "C" fn(*const i8) -> Option<unsafe extern "C" fn()>>

Set by frontend. Can return all relevant functions, including glClear on Windows.

depth: bool

Set if render buffers should have depth component attached. TODO: Obsolete.

stencil: bool

Set if stencil buffers should be attached. TODO: Obsolete.

bottom_left_origin: bool

Use conventional bottom-left origin convention. If false, standard libretro top-left origin semantics are used. TODO: Move to GL specific interface.

version_major: u32

Major version number for core GL context or GLES 3.1+.

version_minor: u32

Minor version number for core GL context or GLES 3.1+.

cache_context: bool

If this is true, the frontend will go very far to avoid resetting context in scenarios like toggling fullscreen, etc. TODO: Obsolete? Maybe frontend should just always assume this …

context_destroy: Option<unsafe extern "C" fn()>

A callback to be called before the context is destroyed in a controlled way by the frontend.

debug_context: bool

Creates a debug context.

Trait Implementations

impl Clone for retro_hw_render_callback

fn clone(&self) -> retro_hw_render_callback

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for retro_hw_render_callback

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Copy for retro_hw_render_callback