1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159

use crate::{ext::*, math::*, platform::*, *};

use riddle_common::define_handles;

/// A simple 2D sprite based renderer.

///

/// A renderer can be created for a Window and holds a reference to the window, which will

/// keep the window alive as long as the renderer is alive.

///

/// # Example

///

/// ```no_run

/// use riddle::{common::Color, platform::*, renderer::*, math::*, *};

/// fn main() -> Result<(), RiddleError> {

///     let rdl =  RiddleLib::new()?;

///     let window = WindowBuilder::new().build(rdl.context())?;

///

///     let renderer = Renderer::new_from_window(&window)?;

///

///     let mut render_ctx /*: impl RenderContext*/ = renderer.begin_render()?;

///     render_ctx.clear(Color::RED)?;

///

///     // Change the current transform matrix, and draw a rect

///     render_ctx.set_transform(glam::Mat4::from_scale(glam::vec3(2.0, 2.0, 1.0)).into())?;

///     render_ctx.fill_rect(&Rect::new(vec2(0.0, 0.0), vec2(10.0, 10.0)), Color::GREEN)?;

///

///     render_ctx.present()?;

///     Ok(())

/// }

/// ```

pub struct Renderer {
    weak_self: RendererWeak,

    wgpu_device: Box<dyn RendererWGPUDevice>,
    standard_res: StandardResources,
}

define_handles!(<Renderer>::weak_self, pub RendererHandle, pub RendererWeak);

impl Renderer {
    /// Initialize a new Renderer, creating a WGPU device for the window.

    ///

    /// # Example

    ///

    /// ```no_run

    /// # use riddle::{common::Color, platform::*, renderer::*, math::*, *};

    /// # fn main() -> Result<(), RiddleError> {

    /// let rdl =  RiddleLib::new()?;

    /// let window = WindowBuilder::new().build(rdl.context())?;

    ///

    /// let renderer = Renderer::new_from_window(&window)?;

    /// # Ok(()) }

    /// ```

    pub fn new_from_window(window: &Window) -> Result<RendererHandle> {
        let wgpu_device = WindowWGPUDevice::new(window)?;
        Self::new_from_device(Box::new(wgpu_device))
    }

    /// Get the frame dimensions as reported by the [`RendererWGPUDevice`].

    ///

    /// In the case of a default Window renderer, this will be the internal size of

    /// the window in logical units.

    ///

    /// # Example

    ///

    /// ```no_run

    /// # use riddle::{common::Color, platform::*, renderer::*, math::*, *};

    /// # fn main() -> Result<(), RiddleError> {

    /// let rdl =  RiddleLib::new()?;

    /// let window = WindowBuilder::new().dimensions(300, 400).build(rdl.context())?;

    ///

    /// let renderer = Renderer::new_from_window(&window)?;

    ///

    /// assert_eq!(vec2(300.0, 400.0), renderer.dimensions());

    /// # Ok(()) }

    /// ```

    pub fn dimensions(&self) -> Vector2<f32> {
        self.wgpu_device.viewport_dimensions()
    }

    /// Get a render context for the current swap chain frame.

    ///

    /// # Example

    ///

    /// ```no_run

    /// # use riddle::{common::Color, platform::*, renderer::*, math::*, *};

    /// # fn main() -> Result<(), RiddleError> {

    /// # let rdl =  RiddleLib::new()?;

    /// # let window = WindowBuilder::new().build(rdl.context())?;

    /// let renderer = Renderer::new_from_window(&window)?;

    ///

    /// let mut render_ctx = renderer.begin_render()?;

    /// render_ctx.clear(Color::RED);

    /// render_ctx.present();

    /// # Ok(()) }

    /// ```

    pub fn begin_render<'a>(&'a self) -> Result<impl RenderContext + 'a> {
        let encoder = self
            .wgpu_device
            .device()
            .create_command_encoder(&wgpu::CommandEncoderDescriptor { label: None });

        let target = SwapChainFrameTarget::new(self, self.dimensions());
        BufferedRenderer::new(target, encoder)
    }

    pub(crate) fn standard_res(&self) -> &StandardResources {
        &self.standard_res
    }
}

impl RendererWGPU for Renderer {
    fn wgpu_device(&self) -> &dyn RendererWGPUDevice {
        Box::as_ref(&self.wgpu_device)
    }

    /// Or the renderer can be built on top of existing WGPU contexts, to allow the simple

    /// renderer to be used on top of custom renderers.

    fn new_from_device(wgpu_device: Box<dyn RendererWGPUDevice>) -> Result<RendererHandle> {
        let vs = include_bytes!("shaders/default.vert.spv");
        let fs = include_bytes!("shaders/default.frag.spv");
        let sprite_shader = Shader::from_readers(
            wgpu_device.device(),
            std::io::Cursor::new(&vs[..]),
            std::io::Cursor::new(&fs[..]),
            wgpu::PrimitiveTopology::TriangleList,
        )?;

        let mut white_img = image::Image::new(1, 1);
        white_img.set_pixel(0, 0, Color::from([0xFF; 4]));
        let white_tex = Texture::from_image(
            wgpu_device.device(),
            wgpu_device.queue(),
            white_img,
            FilterMode::Nearest,
            FilterMode::Nearest,
            TextureType::Plain,
        )?
        .into();

        let standard_res = StandardResources {
            default_shader: sprite_shader,
            white_tex,
        };

        Ok(RendererHandle::new(|weak_self| Self {
            weak_self,
            wgpu_device,
            standard_res,
        }))
    }
}

#[doc(hidden)]
#[derive(Clone)]
pub struct StandardResources {
    pub(super) default_shader: ShaderHandle,
    pub(super) white_tex: TextureHandle,
}