Render text mode into SDL window

apple2/ansiConsoleFrontend.go

@@ -179,7 +179,7 @@ func (fe *ansiConsoleFrontend) textModeGoRoutine() {
 				fmt.Print("\033[KLine: ")
 			}
 
-			saveSnapshot(fe.apple2)
+			//saveSnapshot(fe.apple2)
 		}
 		time.Sleep(refreshDelayMs * time.Millisecond)
 	}

apple2/screen.go

@@ -8,7 +8,8 @@ import (
 	"os"
 )
 
-func snapshot(a *Apple2) image.Image {
+// Snapshot the currently visible screen
+func Snapshot(a *Apple2) *image.RGBA {
 	isTextMode := a.io.isSoftSwitchActive(ioFlagGraphics)
 	is80ColMode := a.io.isSoftSwitchActive(ioFlag80Col)
 	pageIndex := 0
@@ -26,7 +27,7 @@ func snapshot(a *Apple2) image.Image {
 }
 
 func saveSnapshot(a *Apple2) {
-	img := snapshot(a)
+	img := Snapshot(a)
 	if img == nil {
 		return
 	}
@@ -65,29 +66,26 @@ func getTextChar(a *Apple2, col int, line int, page int) uint8 {
 	return a.mmu.internalPeek(address)
 }
 
-func snapshotTextMode(a *Apple2, page int) image.Image {
+func snapshotTextMode(a *Apple2, page int) *image.RGBA {
 	width := textColumns * charWidth
 	height := textLines * charHeight
 	size := image.Rect(0, 0, width, height)
-	bwPalette := []color.Color{color.Black, color.White}
-	img := image.NewPaletted(size, bwPalette)
+	img := image.NewRGBA(size)
 
 	for x := 0; x < width; x++ {
 		for y := 0; y < height; y++ {
-			//yRev := height - y
 			line := y / charHeight
 			col := x / charWidth
 			rowInChar := y % charHeight
 			colInChar := x % charWidth
 			char := getTextChar(a, col, line, page)
 			pixel := a.cg.getPixel(char, rowInChar, colInChar)
-			color := uint8(0)
+			colour := color.Black
 			if pixel {
-				color = 1
+				colour = color.White
 			}
-			img.SetColorIndex(x, y, color)
+			img.Set(x, y, colour)
 		}
-
 	}
 
 	return img

apple2sdl/run.go

@@ -1,6 +1,8 @@
 package apple2sdl
 
 import (
+	"unsafe"
+
 	"github.com/veandco/go-sdl2/sdl"
 
 	"go6502/apple2"
@@ -8,15 +10,16 @@ import (
 
 // SDLRun starts the Apple2 emulator on SDL
 func SDLRun(a *apple2.Apple2) {
-	window, renderer, err := sdl.CreateWindowAndRenderer(800, 600, sdl.WINDOW_SHOWN)
+	window, renderer, err := sdl.CreateWindowAndRenderer(800, 600,
+		sdl.WINDOW_SHOWN)
 	if err != nil {
 		panic("Failed to create window")
 	}
+	window.SetResizable(true)
+
 	defer window.Destroy()
 	defer renderer.Destroy()
 	window.SetTitle("Apple2")
-	renderer.Clear()
-	renderer.Present()
 
 	kp := newSDLKeyBoard()
 	a.SetKeyboardProvider(&kp)
@@ -38,6 +41,27 @@ func SDLRun(a *apple2.Apple2) {
 				kp.putText(t)
 			}
 		}
+
+		img := *apple2.Snapshot(a)
+		surface, err := sdl.CreateRGBSurfaceFrom(unsafe.Pointer(&img.Pix[0]), 40*7, 24*8, 32, 40*7*4,
+			0xff000000, 0x00ff0000, 0x0000ff00, 0x000000ff)
+		if err != nil {
+			panic(err)
+		}
+
+		texture, err := renderer.CreateTextureFromSurface(surface)
+		if err != nil {
+			panic(err)
+		}
+
+		renderer.Clear()
+		w, h := window.GetSize()
+		renderer.Copy(texture, nil, &sdl.Rect{X: 0, Y: 0, W: w, H: h})
+		renderer.Present()
+
+		surface.Free()
+		texture.Destroy()
+
 		sdl.Delay(1000 / 60)
 	}