Swap in the Riverdi RVT70 panel, flip the rotation, and stop ^C orphaning harness runs

harness/grab.go

@@ -155,7 +155,7 @@ func decode(buf []byte, pitch, pw, ph int) *image.NRGBA {
 	img := image.NewNRGBA(image.Rect(0, 0, ph, pw))
 	for x := 0; x < ph; x++ {
 		for y := 0; y < pw; y++ {
-			o := drm.Offset(x, y, pitch, pw)
+			o := drm.Offset(x, y, pitch, ph)
 			v := uint32(buf[o]) | uint32(buf[o+1])<<8 |
 				uint32(buf[o+2])<<16 | uint32(buf[o+3])<<24
 			r, g, b := drm.Unpack(v)

harness/main.go

@@ -6,12 +6,14 @@ package main
 
 import (
 	"bytes"
+	"errors"
 	"flag"
 	"fmt"
 	"image/png"
 	"io"
 	"os"
 	"os/exec"
+	"os/signal"
 	"path/filepath"
 	"slices"
 	"strings"
@@ -19,6 +21,8 @@ import (
 	"time"
 )
 
+var errInterrupted = errors.New("interrupted")
+
 const (
 	shotsDir = "shots"
 	grace    = 3 * time.Second
@@ -55,6 +59,10 @@ func fuzz(n int, runFor time.Duration, args []string) error {
 		start := time.Now()
 		err := run(runFor, "", &buf, args)
 		dur := time.Since(start).Round(100 * time.Millisecond)
+		if errors.Is(err, errInterrupted) {
+			os.Stdout.Write(buf.Bytes())
+			return err
+		}
 		if err != nil {
 			failed++
 			name := fmt.Sprintf("fuzz-run%02d.log", i)
@@ -107,6 +115,12 @@ func run(runFor time.Duration, at string, out io.Writer, args []string) error {
 		}
 	}
 
+	// The child gets its own process group below, which is exactly what stops
+	// the terminal's ^C reaching it, so the harness has to relay the stop.
+	sigs := make(chan os.Signal, 1)
+	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
+	defer signal.Stop(sigs)
+
 	cmd := exec.Command("go", append([]string{"run", "."}, args...)...)
 	cmd.Stdout, cmd.Stderr = out, out
 	// Its own process group: go run's compiled child is reparented rather than
@@ -126,6 +140,8 @@ func run(runFor time.Duration, at string, out io.Writer, args []string) error {
 		select {
 		case err := <-done:
 			return exited(start, err)
+		case <-sigs:
+			return interrupted(start, pgid, done)
 		case <-time.After(time.Until(start.Add(d))):
 		}
 		name := filepath.Join(shotsDir, d.String()+".png")
@@ -139,11 +155,20 @@ func run(runFor time.Duration, at string, out io.Writer, args []string) error {
 	select {
 	case err := <-done:
 		return exited(start, err)
+	case <-sigs:
+		return interrupted(start, pgid, done)
 	case <-time.After(time.Until(start.Add(runFor))):
 	}
 	return stop(pgid, done)
 }
 
+func interrupted(start time.Time, pgid int, done chan error) error {
+	if err := stop(pgid, done); err != nil {
+		return err
+	}
+	return fmt.Errorf("%w after %s", errInterrupted, time.Since(start).Round(time.Millisecond))
+}
+
 func exited(start time.Time, err error) error {
 	ran := time.Since(start).Round(time.Millisecond)
 	if err != nil {