io/profile: [API] delete package

It was a design mistake to make profiling data available to programs.
Rather, profiling should either be a user-configurable debug overlay,
reported through runtime/trace, or both.

This change drops the io/profile package because we're about to overhaul
event routing.

Signed-off-by: Elias Naur <mail@eliasnaur.com>

gpu/compute.go

@@ -93,7 +93,6 @@ type compute struct {
 		}
 	}
 	timers struct {
-		profile string
 		t       *timers
 		compact *timer
 		render  *timer
@@ -176,7 +175,6 @@ type materialUniforms struct {
 
 type collector struct {
 	hasher     maphash.Hash
-	profile    bool
 	reader     ops.Reader
 	states     []f32.Affine2D
 	clear      bool
@@ -597,7 +595,7 @@ func (g *compute) frame(target RenderTarget) error {
 	defer g.ctx.EndFrame()
 
 	t := &g.timers
-	if g.collector.profile && t.t == nil && g.ctx.Caps().Features.Has(driver.FeatureTimers) {
+	if false && t.t == nil && g.ctx.Caps().Features.Has(driver.FeatureTimers) {
 		t.t = newTimers(g.ctx)
 		t.compact = t.t.newTimer()
 		t.render = t.t.newTimer()
@@ -631,13 +629,13 @@ func (g *compute) frame(target RenderTarget) error {
 		return err
 	}
 	t.compact.end()
-	if g.collector.profile && t.t.ready() {
+	if false && t.t.ready() {
 		com, ren, blit := t.compact.Elapsed, t.render.Elapsed, t.blit.Elapsed
 		ft := com + ren + blit
 		q := 100 * time.Microsecond
 		ft = ft.Round(q)
 		com, ren, blit = com.Round(q), ren.Round(q), blit.Round(q)
-		t.profile = fmt.Sprintf("ft:%7s com: %7s ren:%7s blit:%7s", ft, com, ren, blit)
+		// t.profile = fmt.Sprintf("ft:%7s com: %7s ren:%7s blit:%7s", ft, com, ren, blit)
 	}
 	return nil
 }
@@ -661,10 +659,6 @@ func (g *compute) dumpAtlases() {
 	}
 }
 
-func (g *compute) Profile() string {
-	return g.timers.profile
-}
-
 func (g *compute) compactAllocs() error {
 	const (
 		maxAllocAge = 3
@@ -1656,7 +1650,6 @@ func (e *encoder) line(start, end f32.Point) {
 
 func (c *collector) reset() {
 	c.prevFrame, c.frame = c.frame, c.prevFrame
-	c.profile = false
 	c.clipStates = c.clipStates[:0]
 	c.transStack = c.transStack[:0]
 	c.frame.reset()
@@ -1736,8 +1729,6 @@ func (c *collector) collect(root *op.Ops, viewport image.Point, texOps *[]textur
 	c.addClip(&state, fview, fview, nil, ops.Key{}, 0, 0, false)
 	for encOp, ok := r.Decode(); ok; encOp, ok = r.Decode() {
 		switch ops.OpType(encOp.Data[0]) {
-		case ops.TypeProfile:
-			c.profile = true
 		case ops.TypeTransform:
 			dop, push := ops.DecodeTransform(encOp.Data)
 			if push {

gpu/gpu.go

@@ -44,10 +44,6 @@ type GPU interface {
 	Clear(color color.NRGBA)
 	// Frame draws the graphics operations from op into a viewport of target.
 	Frame(frame *op.Ops, target RenderTarget, viewport image.Point) error
-	// Profile returns the last available profiling information. Profiling
-	// information is requested when Frame sees an io/profile.Op, and the result
-	// is available through Profile at some later time.
-	Profile() string
 }
 
 type gpu struct {
@@ -73,7 +69,6 @@ type renderer struct {
 }
 
 type drawOps struct {
-	profile      bool
 	reader       ops.Reader
 	states       []f32.Affine2D
 	transStack   []f32.Affine2D
@@ -399,7 +394,7 @@ func (g *gpu) collect(viewport image.Point, frameOps *op.Ops) {
 	g.renderer.pather.viewport = viewport
 	g.drawOps.reset(viewport)
 	g.drawOps.collect(frameOps, viewport)
-	if g.drawOps.profile && g.timers == nil && g.ctx.Caps().Features.Has(driver.FeatureTimers) {
+	if false && g.timers == nil && g.ctx.Caps().Features.Has(driver.FeatureTimers) {
 		g.frameStart = time.Now()
 		g.timers = newTimers(g.ctx)
 		g.stencilTimer = g.timers.newTimer()
@@ -444,7 +439,7 @@ func (g *gpu) frame(target RenderTarget) error {
 	g.cache.frame()
 	g.drawOps.pathCache.frame()
 	g.cleanupTimer.end()
-	if g.drawOps.profile && g.timers.ready() {
+	if false && g.timers.ready() {
 		st, covt, cleant := g.stencilTimer.Elapsed, g.coverTimer.Elapsed, g.cleanupTimer.Elapsed
 		ft := st + covt + cleant
 		q := 100 * time.Microsecond
@@ -895,7 +890,6 @@ func (r *renderer) drawLayers(layers []opacityLayer, ops []imageOp) {
 }
 
 func (d *drawOps) reset(viewport image.Point) {
-	d.profile = false
 	d.viewport = viewport
 	d.imageOps = d.imageOps[:0]
 	d.pathOps = d.pathOps[:0]
@@ -989,8 +983,6 @@ func (d *drawOps) collectOps(r *ops.Reader, viewport f32.Rectangle) {
 loop:
 	for encOp, ok := r.Decode(); ok; encOp, ok = r.Decode() {
 		switch ops.OpType(encOp.Data[0]) {
-		case ops.TypeProfile:
-			d.profile = true
 		case ops.TypeTransform:
 			dop, push := ops.DecodeTransform(encOp.Data)
 			if push {