internal/driver: Add Graphics.Initialize

internal/driver/graphics.go

@@ -41,6 +41,7 @@ type Graphics interface {
 	SetVertices(vertices []float32, indices []uint16)
 	NewImage(width, height int) (Image, error)
 	NewScreenFramebufferImage(width, height int) (Image, error)
+	Initialize() error
 	Reset() error
 	SetVsyncEnabled(enabled bool)
 	FramebufferYDirection() YDirection

internal/graphicscommand/command.go

@@ -654,7 +654,14 @@ func (c *newShaderCommand) Exec(indexOffset int) error {
 	return err
 }
 
-// ResetGraphicsDriverState resets or initializes the current graphics driver state.
+// InitializeGraphicsDriverState initialize the current graphics driver state.
+func InitializeGraphicsDriverState() error {
+	return runOnMainThread(func() error {
+		return theGraphicsDriver.Initialize()
+	})
+}
+
+// ResetGraphicsDriverState resets the current graphics driver state.
 func ResetGraphicsDriverState() error {
 	return runOnMainThread(func() error {
 		return theGraphicsDriver.Reset()

internal/graphicsdriver/metal/graphics.go

@@ -565,12 +565,7 @@ func operationToBlendFactor(c driver.Operation) mtl.BlendFactor {
 	}
 }
 
-func (g *Graphics) Reset() error {
+func (g *Graphics) Initialize() error {
-	if g.cq != (mtl.CommandQueue{}) {
-		g.cq.Release()
-		g.cq = mtl.CommandQueue{}
-	}
-
 	// Creating *State objects are expensive and reuse them whenever possible.
 	// See https://developer.apple.com/library/archive/documentation/Miscellaneous/Conceptual/MetalProgrammingGuide/Cmd-Submiss/Cmd-Submiss.html
 
@@ -753,6 +748,10 @@ func (g *Graphics) Reset() error {
 	return nil
 }
 
+func (g *Graphics) Reset() error {
+	panic("metal: Reset is not implemented")
+}
+
 func (g *Graphics) flushRenderCommandEncoderIfNeeded() {
 	if g.rce == (mtl.RenderCommandEncoder{}) {
 		return

internal/graphicsdriver/opengl/graphics.go

@@ -129,6 +129,10 @@ func (g *Graphics) removeImage(img *Image) {
 	delete(g.images, img.id)
 }
 
+func (g *Graphics) Initialize() error {
+	return g.state.reset(&g.context)
+}
+
 // Reset resets or initializes the current OpenGL state.
 func (g *Graphics) Reset() error {
 	return g.state.reset(&g.context)

internal/restorable/images.go

@@ -272,7 +272,7 @@ func (i *images) restore() error {
 
 // InitializeGraphicsDriverState initializes the graphics driver state.
 func InitializeGraphicsDriverState() error {
-	return graphicscommand.ResetGraphicsDriverState()
+	return graphicscommand.InitializeGraphicsDriverState()
 }
 
 // MaxImageSize returns the maximum size of an image.