Struct rokol::fons::FontTextureImpl

pub struct FontTextureImpl { /* fields omitted */ }

We have to give fixed memory location to FontTextureImpl so that fontstash (a C library) can call callback methods.

Implementations

impl FontTextureImpl

Interface

pub fn img(&self) -> Image

pub fn cpu_texture(&self) -> (&Vec<u8>, [u32; 2])

pub fn stash(&self) -> &FontStash

pub fn text_bounds_multiline(
    &self,
    text: &str,
    pos: impl Into<[f32; 2]>,
    fontsize: f32,
    line_spacing: f32
) -> [f32; 4]

Copies the shared ownership of Fontstash Returns [x, y, w, h]

pub fn text_size_multiline(
    &self,
    text: &str,
    fontsize: f32,
    line_spacing: f32
) -> [f32; 2]

Returns [x, y, w, h]

impl FontTextureImpl

pub unsafe fn maybe_update_image(&mut self)

Call it every frame but only once

Methods from Deref<Target = FontStash>

pub fn init_mut<R>(&mut self, w: u32, h: u32, renderer: *mut R) where
    R: Renderer, 

pub fn raw(&self) -> *mut FONScontext

pub fn clone(&self) -> FontStash

pub fn add_font_mem(&self, name: &str, data: &[u8]) -> Result<FontIx, FonsError>

pub fn set_font(&self, font: FontIx)

pub fn font_ix_by_name(&self, name: &str) -> Option<FontIx>

pub fn atlas_size(&self) -> [u32; 2]

pub fn expand_atlas(&self, w: u32, h: u32) -> Result<(), FonsError>

Creates fontstash atlas size copying the previous data

pub fn reset_atlas(&self, w: u32, h: u32) -> Result<(), FonsError>

Creates new fontstash atlas with size without copying the previous data

pub fn set_size(&self, size: f32)

NOTE: DPI scaling?

pub fn set_color(&self, color: u32)

pub fn set_spacing(&self, spacing: f32)

Horizontal space between characters?

pub fn set_blur(&self, blur: f32)

pub fn set_align(&self, align: Align)

Sets alignment of quadliterals returned with FontStash::text_iter

pub fn with_pixels(&self, f: impl FnMut(&[u8], u32, u32))

NOTE: Pixel is in one byte (8 bits alpha channel only)

pub fn push_state(&mut self)

pub fn pop_state(&mut self)

pub fn clear_state(&mut self)

pub fn text_iter(&self, text: &str) -> Result<FonsTextIter, FonsError>

Iterator of quadliterals aligned with Align

pub fn text_bounds_oneline(&self, pos: [f32; 2], text: &str) -> [f32; 4]

Returns [left_x, top_y, right_x, bottom_y]. Note that it doesn’t handle multiple lines of text. You need custom layer for multi-line text!

pub fn text_size_oneline(&self, text: &str) -> [f32; 2]

Returns [width, height]. Note that it doesn’t handle multiple lines of text. You need custom layer for multi-line text!

Trait Implementations

impl Debug for FontTextureImpl

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

Formats the value using the given formatter.

impl Deref for FontTextureImpl

type Target = FontStash

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl DerefMut for FontTextureImpl

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.

impl Drop for FontTextureImpl

fn drop(&mut self)

Executes the destructor for this type.

impl Renderer for FontTextureImpl

Renderer implementation

Return 1 to represent success.

unsafe extern "C" fn create(
    uptr: *mut c_void,
    width: c_int,
    height: c_int
) -> c_int

Creates font texture

unsafe extern "C" fn expand(uptr: *mut c_void) -> c_int

Try to double the texture size when the atlas is full

unsafe extern "C" fn resize(
    uptr: *mut c_void,
    width: c_int,
    height: c_int
) -> c_int

Create new texture

unsafe extern "C" fn update(
    uptr: *mut c_void,
    _rect: *mut c_int,
    _data: *const c_uchar
) -> c_int

Update texture