~raph/piet

8bf77efefa53651d6b3b40019034e67e51fd85ee — Raph Levien 3 years ago
Initial commit to start project

At this point, it has the most basic drawing functionality, but it
does draw something.
A  => .gitignore +4 -0
@@ 1,4 @@
/target
**/*.rs.bk
Cargo.lock


A  => Cargo.toml +6 -0
@@ 1,6 @@
[workspace]

members = [
    "piet",
    "piet-direct2d",
]

A  => LICENSE-APACHE +67 -0
@@ 1,67 @@
Apache License

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Copyright 2016 Maik Klein

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

A  => LICENSE-MIT +25 -0
@@ 1,25 @@
Copyright (c) 2019 Raph Levien

Permission is hereby granted, free of charge, to any
person obtaining a copy of this software and associated
documentation files (the "Software"), to deal in the
Software without restriction, including without
limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software
is furnished to do so, subject to the following
conditions:

The above copyright notice and this permission notice
shall be included in all copies or substantial portions
of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

A  => piet-direct2d/Cargo.toml +21 -0
@@ 1,21 @@
[package]
name = "piet-direct2d"
version = "0.1.0"
authors = ["Raph Levien <raph.levien@gmail.com>"]
description = "Direct2D backend for piet 2D graphics abstraction."
license = "MIT/Apache-2.0"
edition = "2018"
keywords = ["graphics", "2d"]
categories = ["rendering::graphics-api"]

[dependencies]
# TODO: don't check anything in with this dep
kurbo = "0.1.0"
piet = { path = "../piet" }

direct2d = "0.2.0"

[dev-dependencies]
direct3d11 = "0.1.7"
dxgi = "0.1.7"
image = "0.20.1"

A  => piet-direct2d/examples/basic.rs +93 -0
@@ 1,93 @@
//! Basic example of rendering on Direct2D.

use direct2d;
use direct2d::enums::BitmapOptions;
use direct2d::image::Bitmap;
use direct2d::RenderTarget;
use direct3d11;
use direct3d11::flags::{BindFlags, CreateDeviceFlags};
use direct3d11::helpers::ComWrapper;
use dxgi::flags::Format;

use piet::RenderContext;
use piet_direct2d::D2DRenderContext;

const TEXTURE_WIDTH: u32 = 400;
const TEXTURE_HEIGHT: u32 = 200;

const TEXTURE_WIDTH_S: usize = TEXTURE_WIDTH as usize;
const TEXTURE_HEIGHT_S: usize = TEXTURE_HEIGHT as usize;

const HIDPI: f32 = 2.0;

fn main() {
    // Create the D2D factory
    let d2d = direct2d::factory::Factory::new().unwrap();

    // Initialize a D3D Device
    let (_, d3d, d3d_ctx) = direct3d11::device::Device::create()
        .with_flags(CreateDeviceFlags::BGRA_SUPPORT)
        .build()
        .unwrap();

    // Create the D2D Device and Context
    let device = direct2d::Device::create(&d2d, &d3d.as_dxgi()).unwrap();
    let mut context = direct2d::DeviceContext::create(&device, false).unwrap();

    // Create a texture to render to
    let tex = direct3d11::texture2d::Texture2D::create(&d3d)
        .with_size(TEXTURE_WIDTH, TEXTURE_HEIGHT)
        .with_format(Format::R8G8B8A8Unorm)
        .with_bind_flags(BindFlags::RENDER_TARGET | BindFlags::SHADER_RESOURCE)
        .build()
        .unwrap();

    // Bind the backing texture to a D2D Bitmap
    let target = Bitmap::create(&context)
        .with_dxgi_surface(&tex.as_dxgi())
        .with_dpi(96.0 * HIDPI, 96.0 * HIDPI)
        .with_options(BitmapOptions::TARGET)
        .build()
        .unwrap();

    context.set_target(&target);
    context.set_dpi(96.0 * HIDPI, 96.0 * HIDPI);
    context.begin_draw();
    let mut piet_context = D2DRenderContext::new(&context);
    piet_context.clear(0xFF_FF_FF);
    piet_context.line((10.0, 10.0), (100.0, 50.0), 1.0);
    context.end_draw().unwrap();

    let temp_texture = direct3d11::texture2d::Texture2D::create(&d3d)
        .with_size(TEXTURE_WIDTH, TEXTURE_HEIGHT)
        .with_format(direct3d11::flags::Format::R8G8B8A8Unorm)
        .with_bind_flags(direct3d11::flags::BindFlags::NONE)
        .with_usage(direct3d11::flags::Usage::Staging)
        .with_cpu_access_flags(direct3d11::flags::CpuAccessFlags::READ)
        .build()
        .unwrap();

    // Get the data so we can write it to a file
    // TODO: Have a safe way to accomplish this :D
    let mut raw_pixels: Vec<u8> = Vec::with_capacity(TEXTURE_WIDTH_S * TEXTURE_HEIGHT_S * 4);
    unsafe {
        let ctx = &*d3d_ctx.get_raw();
        ctx.CopyResource(temp_texture.get_raw() as *mut _, tex.get_raw() as *mut _);
        ctx.Flush();

        let surface = temp_texture.as_dxgi();
        let map = surface.map(true, false, false).unwrap();
        for y in 0..TEXTURE_HEIGHT {
            raw_pixels.extend_from_slice(&map.row(y)[..TEXTURE_WIDTH_S * 4]);
        }
    }

    image::save_buffer(
        "temp-image.png",
        &raw_pixels,
        TEXTURE_WIDTH,
        TEXTURE_HEIGHT,
        image::ColorType::RGBA(8),
    )
    .unwrap();
}

A  => piet-direct2d/src/lib.rs +89 -0
@@ 1,89 @@
//! The Direct2D backend for the Piet 2D graphics abstraction.

use direct2d::brush::SolidColorBrush;
use direct2d::math::Point2F;
use direct2d::render_target::{GenericRenderTarget, RenderTarget};

use kurbo::Vec2;

use piet::{RenderContext, RoundFrom, RoundInto};

/// It is an interesting question, whether to wrap, or whether this should move into
/// piet proper under a feature. (We want to impl RenderContext for this, but we can't
/// impl RenderContext for GenericRenderTarget directly here due to coherence).
pub struct D2DRenderContext {
    rt: GenericRenderTarget,
}

impl D2DRenderContext {
    pub fn new<RT: RenderTarget>(rt: &RT) -> D2DRenderContext {
        D2DRenderContext {
            rt: rt.as_generic(),
        }
    }
}

/// This is wrapped for coherence reasons.
///
/// TODO: consider using Point2F instead, and moving conversions into kurbo.
pub struct Point2(Point2F);

impl From<Point2F> for Point2 {
    #[inline]
    fn from(vec: Point2F) -> Point2 {
        Point2(vec.into())
    }
}

impl From<(f32, f32)> for Point2 {
    #[inline]
    fn from(vec: (f32, f32)) -> Point2 {
        Point2(Point2F::new(vec.0, vec.1))
    }
}

// TODO: Maybe there's some blanket implementation that would cover this and
// not cause coherence problems.
impl RoundFrom<(f32, f32)> for Point2 {
    #[inline]
    fn round_from(vec: (f32, f32)) -> Point2 {
        Point2(Point2F::new(vec.0, vec.1))
    }
}

impl RoundFrom<Vec2> for Point2 {
    #[inline]
    fn round_from(vec: Vec2) -> Point2 {
        Point2(Point2F::new(vec.x as f32, vec.y as f32))
    }
}

impl From<Point2> for Vec2 {
    #[inline]
    fn from(vec: Point2) -> Vec2 {
        Vec2::new(vec.0.x as f64, vec.0.y as f64)
    }
}

impl RenderContext for D2DRenderContext {
    type Point = Point2;
    type Coord = f32;

    fn clear(&mut self, rgb_color: u32) {
        self.rt.clear(rgb_color);
    }

    fn line<V: RoundInto<Point2>, C: RoundInto<f32>>(&mut self, p0: V, p1: V, width: C) {
        let brush = SolidColorBrush::create(&self.rt)
            .with_color(0x00_00_80)
            .build()
            .unwrap();
        self.rt.draw_line(
            p0.round_into().0,
            p1.round_into().0,
            &brush,
            width.round_into(),
            None,
        );
    }
}

A  => piet/Cargo.toml +12 -0
@@ 1,12 @@
[package]
name = "piet"
version = "0.1.0"
authors = ["Raph Levien <raph.levien@gmail.com>"]
description = "An abstraction for 2D graphics."
license = "MIT/Apache-2.0"
edition = "2018"
keywords = ["graphics", "2d"]
categories = ["rendering::graphics-api"]

[dependencies]
kurbo = "0.1.0"

A  => piet/src/cairo_impl.rs +11 -0
@@ 1,11 @@
//! Cairo implementation of 2D abstraction.

use cairo;

pub type Factory = ();

pub type Device = ();

pub struct ImageSurface {
    inner: cairo::ImageSurface,
}

A  => piet/src/direct2d_impl.rs +14 -0
@@ 1,14 @@
//! Direct2D implementation of 2D abstraction.

use direct2d;

// This type will probably expand to include direct2d and directwrite; but we'll
// tackle text later.
pub type Factory = direct2d::Factory;

pub type Device = direct2d::Device;

pub struct Context(direct2d::render_target::GenericRenderTarget);

pub struct ImageSurface {
}

A  => piet/src/lib.rs +7 -0
@@ 1,7 @@
//! A 2D graphics abstraction.

mod conv;
mod traits;

pub use crate::conv::*;
pub use crate::traits::*;

A  => piet/src/traits.rs +21 -0
@@ 1,21 @@
//! Fundamental graphics traits.

use kurbo::Vec2;

use crate::{RoundFrom, RoundInto};

pub trait RenderContext {
    /// Backends specify their own types for coordinates.
    type Point: Into<Vec2> + RoundFrom<Vec2>;
    type Coord: Into<f64> + RoundFrom<f64>;

    /// Clear the canvas with the given color.
    fn clear(&mut self, rgb: u32);

    fn line<V: RoundInto<Self::Point>, C: RoundInto<Self::Coord>>(
        &mut self,
        p0: V,
        p1: V,
        width: C,
    );
}