Method draw

examples/runners/ash/src/main.rs:970–1028

(
        &self,
        pipeline: &Pipeline,
        framebuffer: vk::Framebuffer,
        clear_values: &[vk::ClearValue],
    )

    }

    pub fn draw(
        &self,
        pipeline: &Pipeline,
        framebuffer: vk::Framebuffer,
        clear_values: &[vk::ClearValue],
    ) {
        let render_pass_begin_info = vk::RenderPassBeginInfo::builder()
            .render_pass(self.render_pass)
            .framebuffer(framebuffer)
            .render_area(vk::Rect2D {
                offset: vk::Offset2D { x: 0, y: 0 },
                extent: self.scissors[0].extent,
            })
            .clear_values(clear_values)
            .build();
        self.record_submit_commandbuffer(
            &[vk::PipelineStageFlags::COLOR_ATTACHMENT_OUTPUT],
            |device, draw_command_buffer| unsafe {
                device.cmd_begin_render_pass(
                    draw_command_buffer,
                    &render_pass_begin_info,
                    vk::SubpassContents::INLINE,
                );
                device.cmd_bind_pipeline(
                    draw_command_buffer,
                    vk::PipelineBindPoint::GRAPHICS,
                    pipeline.pipeline,
                );
                device.cmd_set_viewport(draw_command_buffer, 0, &self.viewports);
                device.cmd_set_scissor(draw_command_buffer, 0, &self.scissors);

                let push_constants = ShaderConstants {
                    width: self.scissors[0].extent.width,
                    height: self.scissors[0].extent.height,
                    time: self.start.elapsed().as_secs_f32(),

                    // FIXME(eddyb) implement mouse support for the ash runner.
                    cursor_x: 0.0,
                    cursor_y: 0.0,
                    drag_start_x: 0.0,
                    drag_start_y: 0.0,
                    drag_end_x: 0.0,
                    drag_end_y: 0.0,
                    mouse_button_pressed: 0,
                    mouse_button_press_time: [f32::NEG_INFINITY; 3],
                };
                device.cmd_push_constants(
                    draw_command_buffer,
                    pipeline.pipeline_layout,
                    ash::vk::ShaderStageFlags::ALL,
                    0,
                    any_as_u8_slice(&push_constants),
                );

                device.cmd_draw(draw_command_buffer, 3, 1, 0, 0);
                device.cmd_end_render_pass(draw_command_buffer);
            },
        );