VK2D is a 2D renderer using Vulkan and SDL2 primarily for C games. VK2D aims for an extremely simple API, requiring no Vulkan experience to use. Astro and more recently Bedlam internally use Vulkan2D for rendering. My other projects Spacelink and Peace & Liberty also used Vulkan2D, although a much older version of it. Check out the quick-start guide.

• Simple and intuitive API built on top of SDL
• Draw shapes/textures/3D models/arbitrary polygons to the screen or other textures
• Fast, built with Vulkan 1.2 and doesn't require any device features (but it can make use of some)
• Simple and fully-featured cameras, allowing for multiple concurrent cameras
• Powerful and very simple shader interface
• Simple access to the Vulkan implementation through VK2D/VulkanInterface.h
• Easily load multiple resources in the background while your application gets prepared

Every file in VK2D is properly documented for doxygen, run doxygen in Vulkan2D/ and an html folder will be created containing the documentation.

There are two parts to building it with your project: you must build VK2D and also VMA since VK2D needs VMA to function. You'll likely need to do something like this in CMake:

set(VMA_FILES VK2D/VulkanMemoryAllocator/src/vk_mem_alloc.h VK2D/VulkanMemoryAllocator/src/VmaUsage.cpp)
file(GLOB VK2D_FILES VK2D/VK2D/*.c)
...
include_directories(... Vulkan2D/ tinyobjloader-c VulkanMemoryAllocator/src/)
add_executable(... ${VK2D_FILES} ${VMA_FILES})

You also need to link/include SDL2 and Vulkan but that will not be covered here as there are great guides elsewhere. Feel free to use the included CMakeLists.txt as a starting point.

Using the renderer is quite simple, but there are some things to be aware of. For the sake of brevity, error checking is removed from the following example

SDL_Window *window = SDL_CreateWindow("VK2D", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, WINDOW_WIDTH, WINDOW_HEIGHT, SDL_WINDOW_VULKAN);
SDL_Event e;
VK2DRendererConfig config = {VK2D_MSAA_32X, VK2D_SCREEN_MODE_TRIPLE_BUFFER, VK2D_FILTER_TYPE_NEAREST};
vk2dRendererInit(window, config, NULL);
vec4 clearColour;
vk2dColourHex(clearColour, "#59d9d7");
bool stopRunning = false;

// Load your resources

while (!stopRunning) {
    while (SDL_PollEvent(&e)) {
        if (e.type == SDL_QUIT) {
            stopRunning = true;
        }
    }

    vk2dRendererStartFrame(clearColour);

    // Draw your things

    vk2dRendererEndFrame();
}

vk2dRendererWait();

// Free your resources

vk2dRendererQuit();
SDL_DestroyWindow(window);

And that's about all you need. You can freely manipulate the window, if Vulkan2D detects a window change the renderer will automatically adjust. Check the examples in examples/ for full examples you can compile.

• 3D shaders