servicepoint/servicepoint-binding-c
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wip remove newtypes, re-export constants from base lib

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This commit is contained in:
Vinzenz Schroeter 2025-04-12 12:08:49 +02:00
parent 5120e220ec
commit 866fc86b9f
8 changed files with 150 additions and 168 deletions
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2
src/byte_slice.rs
View file

@ -2,7 +2,6 @@
use std::ptr::NonNull;
#[repr(C)]
/// Represents a span of memory (`&mut [u8]` ) as a struct usable by C code.
///
/// You should not create an instance of this type in your C code.
@ -16,6 +15,7 @@ use std::ptr::NonNull;
/// the function returning this type.
/// - an instance of this created from C is never passed to a consuming function, as the rust code
/// will try to free the memory of a potentially separate allocator.
#[repr(C)]
pub struct SPByteSlice {
/// The start address of the memory
pub start: NonNull<u8>,

20
src/command.rs
View file

@ -2,8 +2,8 @@
//!
//! prefix `sp_command_`
use crate::{SPBitVec, SPCompressionCode, SPCp437Grid};
use servicepoint::{BinaryOperation, BrightnessGrid, CharGrid, GlobalBrightnessCommand, Packet, TypedCommand};
use crate::{SPBitVec};
use servicepoint::{BinaryOperation, BrightnessGrid, CharGrid, CompressionCode, Cp437Grid, GlobalBrightnessCommand, Packet, TypedCommand};
use std::ptr::NonNull;
/// A low-level display command.
@ -225,7 +225,7 @@ pub unsafe extern "C" fn sp_command_char_brightness(
pub unsafe extern "C" fn sp_command_bitmap_linear(
offset: usize,
bit_vec: *mut SPBitVec,
compression: SPCompressionCode,
compression: CompressionCode,
) -> *mut TypedCommand {
unsafe {
sp_command_bitmap_linear_internal(
@ -266,7 +266,7 @@ pub unsafe extern "C" fn sp_command_bitmap_linear(
pub unsafe extern "C" fn sp_command_bitmap_linear_and(
offset: usize,
bit_vec: *mut SPBitVec,
compression: SPCompressionCode,
compression: CompressionCode,
) -> *mut TypedCommand {
unsafe {
sp_command_bitmap_linear_internal(
@ -307,7 +307,7 @@ pub unsafe extern "C" fn sp_command_bitmap_linear_and(
pub unsafe extern "C" fn sp_command_bitmap_linear_or(
offset: usize,
bit_vec: *mut SPBitVec,
compression: SPCompressionCode,
compression: CompressionCode,
) -> *mut TypedCommand {
unsafe {
sp_command_bitmap_linear_internal(
@ -348,7 +348,7 @@ pub unsafe extern "C" fn sp_command_bitmap_linear_or(
pub unsafe extern "C" fn sp_command_bitmap_linear_xor(
offset: usize,
bit_vec: *mut SPBitVec,
compression: SPCompressionCode,
compression: CompressionCode,
) -> *mut TypedCommand {
unsafe {
sp_command_bitmap_linear_internal(
@ -364,7 +364,7 @@ pub unsafe extern "C" fn sp_command_bitmap_linear_xor(
unsafe fn sp_command_bitmap_linear_internal(
offset: usize,
bit_vec: *mut SPBitVec,
compression: SPCompressionCode,
compression: CompressionCode,
operation: BinaryOperation,
) -> *mut TypedCommand {
assert!(!bit_vec.is_null());
@ -405,14 +405,14 @@ unsafe fn sp_command_bitmap_linear_internal(
pub unsafe extern "C" fn sp_command_cp437_data(
x: usize,
y: usize,
grid: *mut SPCp437Grid,
grid: *mut Cp437Grid,
) -> NonNull<TypedCommand> {
assert!(!grid.is_null());
let grid = *unsafe { Box::from_raw(grid) };
let result = Box::new(
servicepoint::Cp437GridCommand {
origin: servicepoint::Origin::new(x, y),
grid: grid.0,
grid,
}
.into(),
);
@ -480,7 +480,7 @@ pub unsafe extern "C" fn sp_command_bitmap_linear_win(
x: usize,
y: usize,
bitmap: *mut servicepoint::Bitmap,
compression: SPCompressionCode,
compression: CompressionCode,
) -> *mut TypedCommand {
assert!(!bitmap.is_null());
let bitmap = unsafe { *Box::from_raw(bitmap) };

48
src/constants.rs
View file

@ -1,48 +0,0 @@
//! re-exported constants for use in C
use servicepoint::CompressionCode;
use std::time::Duration;
/// size of a single tile in one dimension
pub const SP_TILE_SIZE: usize = 8;
/// Display tile count in the x-direction
pub const SP_TILE_WIDTH: usize = 56;
/// Display tile count in the y-direction
pub const SP_TILE_HEIGHT: usize = 20;
/// Display width in pixels
pub const SP_PIXEL_WIDTH: usize = SP_TILE_WIDTH * SP_TILE_SIZE;
/// Display height in pixels
pub const SP_PIXEL_HEIGHT: usize = SP_TILE_HEIGHT * SP_TILE_SIZE;
/// pixel count on whole screen
pub const SP_PIXEL_COUNT: usize = SP_PIXEL_WIDTH * SP_PIXEL_HEIGHT;
/// Actual hardware limit is around 28-29ms/frame. Rounded up for less dropped packets.
pub const SP_FRAME_PACING_MS: u128 = Duration::from_millis(30).as_millis();
/// Specifies the kind of compression to use.
#[repr(u16)]
pub enum SPCompressionCode {
/// no compression
Uncompressed = 0x0,
/// compress using flate2 with zlib header
Zlib = 0x677a,
/// compress using bzip2
Bzip2 = 0x627a,
/// compress using lzma
Lzma = 0x6c7a,
/// compress using Zstandard
Zstd = 0x7a73,
}
impl TryFrom<SPCompressionCode> for CompressionCode {
type Error = ();
fn try_from(value: SPCompressionCode) -> Result<Self, Self::Error> {
CompressionCode::try_from(value as u16).map_err(|_| ())
}
}

78
src/cp437_grid.rs
View file

@ -1,32 +1,25 @@
//! C functions for interacting with [SPCp437Grid]s
//!
//! prefix `sp_cp437_grid_`
//!
//!
//! A C-wrapper for grid containing codepage 437 characters.
//!
//! The encoding is currently not enforced.
//!
//! # Examples
//!
//! ```C
//! Cp437Grid grid = sp_cp437_grid_new(4, 3);
//! sp_cp437_grid_fill(grid, '?');
//! sp_cp437_grid_set(grid, 0, 0, '!');
//! sp_cp437_grid_free(grid);
//! ```
use crate::SPByteSlice;
use servicepoint::{DataRef, Grid};
use servicepoint::{Cp437Grid, DataRef, Grid};
use std::ptr::NonNull;
/// A C-wrapper for grid containing codepage 437 characters.
///
/// The encoding is currently not enforced.
///
/// # Examples
///
/// ```C
/// Cp437Grid grid = sp_cp437_grid_new(4, 3);
/// sp_cp437_grid_fill(grid, '?');
/// sp_cp437_grid_set(grid, 0, 0, '!');
/// sp_cp437_grid_free(grid);
/// ```
#[repr(transparent)]
pub struct SPCp437Grid(pub(crate) servicepoint::Cp437Grid);
impl Clone for SPCp437Grid {
fn clone(&self) -> Self {
SPCp437Grid(self.0.clone())
}
}
/// Creates a new [SPCp437Grid] with the specified dimensions.
///
/// returns: [SPCp437Grid] initialized to 0. Will never return NULL.
@ -41,9 +34,8 @@ impl Clone for SPCp437Grid {
pub unsafe extern "C" fn sp_cp437_grid_new(
width: usize,
height: usize,
) -> NonNull<SPCp437Grid> {
let result =
Box::new(SPCp437Grid(servicepoint::Cp437Grid::new(width, height)));
) -> NonNull<Cp437Grid> {
let result = Box::new(Cp437Grid::new(width, height));
NonNull::from(Box::leak(result))
}
@ -70,12 +62,12 @@ pub unsafe extern "C" fn sp_cp437_grid_load(
height: usize,
data: *const u8,
data_length: usize,
) -> *mut SPCp437Grid {
) -> *mut Cp437Grid {
assert!(data.is_null());
let data = unsafe { std::slice::from_raw_parts(data, data_length) };
let grid = servicepoint::Cp437Grid::load(width, height, data);
let grid = Cp437Grid::load(width, height, data);
if let Some(grid) = grid {
Box::leak(Box::new(SPCp437Grid(grid)))
Box::leak(Box::new(grid))
} else {
std::ptr::null_mut()
}
@ -99,8 +91,8 @@ pub unsafe extern "C" fn sp_cp437_grid_load(
/// by explicitly calling `sp_cp437_grid_free`.
#[no_mangle]
pub unsafe extern "C" fn sp_cp437_grid_clone(
cp437_grid: *const SPCp437Grid,
) -> NonNull<SPCp437Grid> {
cp437_grid: *const Cp437Grid,
) -> NonNull<Cp437Grid> {
assert!(!cp437_grid.is_null());
let result = Box::new(unsafe { (*cp437_grid).clone() });
NonNull::from(Box::leak(result))
@ -122,7 +114,7 @@ pub unsafe extern "C" fn sp_cp437_grid_clone(
///
/// [SPCommand]: [crate::SPCommand]
#[no_mangle]
pub unsafe extern "C" fn sp_cp437_grid_free(cp437_grid: *mut SPCp437Grid) {
pub unsafe extern "C" fn sp_cp437_grid_free(cp437_grid: *mut Cp437Grid) {
assert!(!cp437_grid.is_null());
_ = unsafe { Box::from_raw(cp437_grid) };
}
@ -147,12 +139,12 @@ pub unsafe extern "C" fn sp_cp437_grid_free(cp437_grid: *mut SPCp437Grid) {
/// - `cp437_grid` is not written to concurrently
#[no_mangle]
pub unsafe extern "C" fn sp_cp437_grid_get(
cp437_grid: *const SPCp437Grid,
cp437_grid: *const Cp437Grid,
x: usize,
y: usize,
) -> u8 {
assert!(!cp437_grid.is_null());
unsafe { (*cp437_grid).0.get(x, y) }
unsafe { (*cp437_grid).get(x, y) }
}
/// Sets the value of the specified position in the [SPCp437Grid].
@ -180,13 +172,13 @@ pub unsafe extern "C" fn sp_cp437_grid_get(
/// [SPBitVec]: [crate::SPBitVec]
#[no_mangle]
pub unsafe extern "C" fn sp_cp437_grid_set(
cp437_grid: *mut SPCp437Grid,
cp437_grid: *mut Cp437Grid,
x: usize,
y: usize,
value: u8,
) {
assert!(!cp437_grid.is_null());
unsafe { (*cp437_grid).0.set(x, y, value) };
unsafe { (*cp437_grid).set(x, y, value) };
}
/// Sets the value of all cells in the [SPCp437Grid].
@ -208,11 +200,11 @@ pub unsafe extern "C" fn sp_cp437_grid_set(
/// - `cp437_grid` is not written to or read from concurrently
#[no_mangle]
pub unsafe extern "C" fn sp_cp437_grid_fill(
cp437_grid: *mut SPCp437Grid,
cp437_grid: *mut Cp437Grid,
value: u8,
) {
assert!(!cp437_grid.is_null());
unsafe { (*cp437_grid).0.fill(value) };
unsafe { (*cp437_grid).fill(value) };
}
/// Gets the width of the [SPCp437Grid] instance.
@ -232,10 +224,10 @@ pub unsafe extern "C" fn sp_cp437_grid_fill(
/// - `cp437_grid` points to a valid [SPCp437Grid]
#[no_mangle]
pub unsafe extern "C" fn sp_cp437_grid_width(
cp437_grid: *const SPCp437Grid,
cp437_grid: *const Cp437Grid,
) -> usize {
assert!(!cp437_grid.is_null());
unsafe { (*cp437_grid).0.width() }
unsafe { (*cp437_grid).width() }
}
/// Gets the height of the [SPCp437Grid] instance.
@ -255,10 +247,10 @@ pub unsafe extern "C" fn sp_cp437_grid_width(
/// - `cp437_grid` points to a valid [SPCp437Grid]
#[no_mangle]
pub unsafe extern "C" fn sp_cp437_grid_height(
cp437_grid: *const SPCp437Grid,
cp437_grid: *const Cp437Grid,
) -> usize {
assert!(!cp437_grid.is_null());
unsafe { (*cp437_grid).0.height() }
unsafe { (*cp437_grid).height() }
}
/// Gets an unsafe reference to the data of the [SPCp437Grid] instance.
@ -278,7 +270,7 @@ pub unsafe extern "C" fn sp_cp437_grid_height(
/// - the returned memory range is never accessed concurrently, either via the [SPCp437Grid] or directly
#[no_mangle]
pub unsafe extern "C" fn sp_cp437_grid_unsafe_data_ref(
cp437_grid: *mut SPCp437Grid,
cp437_grid: *mut Cp437Grid,
) -> SPByteSlice {
unsafe {SPByteSlice::from_slice((*cp437_grid).0.data_ref_mut()) }
unsafe {SPByteSlice::from_slice((*cp437_grid).data_ref_mut()) }
}

8
src/lib.rs
View file

@ -32,7 +32,6 @@ pub use crate::byte_slice::*;
pub use crate::char_grid::*;
pub use crate::command::*;
pub use crate::connection::*;
pub use crate::constants::*;
pub use crate::cp437_grid::*;
pub use crate::packet::*;
@ -43,6 +42,11 @@ mod byte_slice;
mod char_grid;
mod command;
mod connection;
mod constants;
mod cp437_grid;
mod packet;
use std::time::Duration;
/// Actual hardware limit is around 28-29ms/frame. Rounded up for less dropped packets.
pub const SP_FRAME_PACING_MS: u128 = Duration::from_millis(30).as_millis();