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Merge pull request #387 from hatoo/add-comment

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Add a comment of how to clear the display to `integration` example
This commit is contained in:
Héctor Ramón 2020-06-05 17:36:18 +02:00 committed by GitHub
commit ca6ff874a1
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2 changed files with 38 additions and 34 deletions
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17
examples/integration/src/main.rs
View File

@ -154,14 +154,19 @@ pub fn main() {
&wgpu::CommandEncoderDescriptor { label: None },
);
// We draw the scene first
let program = state.program();
scene.draw(
&mut encoder,
&frame.view,
program.background_color(),
);
{
// We clear the frame
let mut render_pass = scene.clear(
&frame.view,
&mut encoder,
program.background_color(),
);
// Draw the scene
scene.draw(&mut render_pass);
}
// And then iced on top
let mouse_interaction = renderer.backend_mut().draw(

55
examples/integration/src/scene.rs
View File

@ -16,38 +16,37 @@ impl Scene {
}
}
pub fn draw(
pub fn clear<'a>(
&self,
encoder: &mut wgpu::CommandEncoder,
target: &wgpu::TextureView,
target: &'a wgpu::TextureView,
encoder: &'a mut wgpu::CommandEncoder,
background_color: Color,
) {
let mut rpass =
encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
color_attachments: &[
wgpu::RenderPassColorAttachmentDescriptor {
attachment: target,
resolve_target: None,
load_op: wgpu::LoadOp::Clear,
store_op: wgpu::StoreOp::Store,
clear_color: {
let [r, g, b, a] = background_color.into_linear();
) -> wgpu::RenderPass<'a> {
encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
color_attachments: &[wgpu::RenderPassColorAttachmentDescriptor {
attachment: target,
resolve_target: None,
load_op: wgpu::LoadOp::Clear,
store_op: wgpu::StoreOp::Store,
clear_color: {
let [r, g, b, a] = background_color.into_linear();
wgpu::Color {
r: r as f64,
g: g as f64,
b: b as f64,
a: a as f64,
}
},
},
],
depth_stencil_attachment: None,
});
wgpu::Color {
r: r as f64,
g: g as f64,
b: b as f64,
a: a as f64,
}
},
}],
depth_stencil_attachment: None,
})
}
rpass.set_pipeline(&self.pipeline);
rpass.set_bind_group(0, &self.bind_group, &[]);
rpass.draw(0..3, 0..1);
pub fn draw<'a>(&'a self, render_pass: &mut wgpu::RenderPass<'a>) {
render_pass.set_pipeline(&self.pipeline);
render_pass.set_bind_group(0, &self.bind_group, &[]);
render_pass.draw(0..3, 0..1);
}
}