129 lines
2.8 KiB
Go
129 lines
2.8 KiB
Go
package main
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import (
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"github.com/pkg/errors"
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"github.com/veandco/go-sdl2/sdl"
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"github.com/vkngwrapper/core/v2"
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"github.com/vkngwrapper/core/v2/common"
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"github.com/vkngwrapper/core/v2/core1_0"
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"github.com/vkngwrapper/extensions/v2/khr_portability_enumeration"
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"log"
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)
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type HelloTriangleApplication struct {
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loader core.Loader
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window *sdl.Window
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instance core1_0.Instance
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}
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func (app *HelloTriangleApplication) Run() error {
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err := app.initWindow()
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if err != nil {
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return err
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}
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err = app.initVulkan()
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if err != nil {
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return err
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}
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defer app.cleanup()
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return app.mainLoop()
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}
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func (app *HelloTriangleApplication) initWindow() error {
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if err := sdl.Init(sdl.INIT_VIDEO); err != nil {
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return err
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}
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window, err := sdl.CreateWindow("Vulkan", sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED, 800, 600, sdl.WINDOW_SHOWN|sdl.WINDOW_VULKAN)
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if err != nil {
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return err
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}
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app.window = window
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app.loader, err = core.CreateSystemLoader()
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if err != nil {
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return err
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}
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return nil
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}
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func (app *HelloTriangleApplication) initVulkan() error {
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return app.createInstance()
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}
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func (app *HelloTriangleApplication) mainLoop() error {
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appLoop:
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for true {
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for event := sdl.PollEvent(); event != nil; event = sdl.PollEvent() {
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switch event.(type) {
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case *sdl.QuitEvent:
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break appLoop
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}
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}
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}
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return nil
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}
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func (app *HelloTriangleApplication) cleanup() {
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if app.instance != nil {
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app.instance.Destroy(nil)
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}
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if app.window != nil {
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app.window.Destroy()
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}
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sdl.Quit()
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}
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func (app *HelloTriangleApplication) createInstance() error {
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instanceOptions := core1_0.InstanceCreateInfo{
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ApplicationName: "Hello Triangle",
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ApplicationVersion: common.CreateVersion(1, 0, 0),
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EngineName: "No Engine",
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EngineVersion: common.CreateVersion(1, 0, 0),
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APIVersion: common.Vulkan1_2,
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}
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// Add extensions
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sdlExtensions := app.window.VulkanGetInstanceExtensions()
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extensions, _, err := app.loader.AvailableExtensions()
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if err != nil {
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return err
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}
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for _, ext := range sdlExtensions {
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_, hasExt := extensions[ext]
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if !hasExt {
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return errors.Errorf("createinstance: cannot initialize sdl: missing extension %s", ext)
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}
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instanceOptions.EnabledExtensionNames = append(instanceOptions.EnabledExtensionNames, ext)
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}
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_, enumerationSupported := extensions[khr_portability_enumeration.ExtensionName]
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if enumerationSupported {
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instanceOptions.EnabledExtensionNames = append(instanceOptions.EnabledExtensionNames, khr_portability_enumeration.ExtensionName)
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instanceOptions.Flags |= khr_portability_enumeration.InstanceCreateEnumeratePortability
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}
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app.instance, _, err = app.loader.CreateInstance(nil, instanceOptions)
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if err != nil {
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return err
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}
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return nil
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}
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func main() {
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app := &HelloTriangleApplication{}
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err := app.Run()
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if err != nil {
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log.Fatalf("%+v\n", err)
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}
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}
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