solid_color

Solid Color

Solid Color Sample

This sample demonstrates rendering a single-color texture to the viewport, bypassing direct swapchain image rendering.

Overview

The sample utilizes a 1x1 texture to display a user-selected color, updating dynamically based on GUI input.

Implementation Details

Initialization

In main():

1. nvvkhl::Application is instantiated using nvvkhl::ApplicationCreateInfo.
   • This initializes the Vulkan instance, device, physical device, GLFW window, and Dear ImGui.
   • For detailed initialization steps, refer to nvvkhl::Application::init().
2. The SolidColor sample is created, derived from nvvkhl::IAppElement.

Resource Allocation

In onAttach():

1. AllocVma is instantiated, deriving from nvvk::ResourceAllocator.
   • This core helper class from nvpro_core/nvvk facilitates efficient resource creation.
   • The sample utilizes Vulkan Memory Allocator (VMA) for memory management.
2. A 1x1 texture is created for color display.

Main Loop

The application enters an infinite loop via ->run() until closure is requested. Each iteration invokes:

• onUIRender(): Renders the GUI in the "Settings" window.
• onUIMenu(): Handles menu interactions.
• onResize(w,h): Manages viewport resizing.
• onRender(cmd): Executes per-frame rendering logic.

Rendering Process

1. The texture is displayed as a UI element in the "Viewport" window using ImGui::Image().
2. onRender() is called each frame.
3. If color changes are detected, setData(cmd) updates the texture with the new color selected in the GUI.

This implementation showcases efficient texture updating and rendering techniques within a Vulkan-based application framework.