Struct femtovg::renderer::OpenGl

pub struct OpenGl { /* fields omitted */ }

Implementations

impl OpenGl

pub fn new<F>(load_fn: F) -> Result<Self, ErrorKind> where
    F: FnMut(&str) -> *const c_void, 

pub fn is_opengles(&self) -> bool

pub fn set_screen_target(
    &mut self,
    framebuffer_object: Option<<Context as HasContext>::Framebuffer>
)

Make the “Screen” RenderTarget actually render to a framebuffer object. This is useful when embedding femtovg into another program where final composition is handled by an external task. The given framebuffer_object must refer to a Framebuffer Object created on the current OpenGL Context, and must have a depth & stencil attachment.

Pass None to clear any previous Framebuffer Object ID that was passed and target rendering to the default target (normally the window).

Trait Implementations

impl Drop for OpenGl

fn drop(&mut self)

Executes the destructor for this type.

impl Renderer for OpenGl

type Image = GlTexture

fn set_size(&mut self, width: u32, height: u32, _dpi: f32)

fn render(
    &mut self,
    images: &mut ImageStore<Self::Image>,
    verts: &[Vertex],
    commands: Vec<Command>
)

fn alloc_image(&mut self, info: ImageInfo) -> Result<Self::Image, ErrorKind>

fn update_image(
    &mut self,
    image: &mut Self::Image,
    data: ImageSource<'_>,
    x: usize,
    y: usize
) -> Result<(), ErrorKind>

fn delete_image(&mut self, image: Self::Image, image_id: ImageId)

fn screenshot(&mut self) -> Result<ImgVec<RGBA8>, ErrorKind>