graphics: image bayer dithering; movie test using image decoding of tsvm's gpu

assets/disk0/home/jpdectest.js

@@ -20,7 +20,7 @@ println(`dim: ${imgw}x${imgh}`)
 println(`converting to displayable format...`)
 
 // convert colour
-graphics.imageToDisplayableFormat(imageData, -1048577, imgw, imgh, 4, true)
+graphics.imageToDisplayableFormat(imageData, -1048577, imgw, imgh, 4, 2)
 
 sys.free(imageData)
 sys.free(infile)

assets/disk0/movtest.js

@@ -0,0 +1,20 @@
+
+let infile = sys.malloc(752704)
+let imagearea = sys.malloc(560*448*3)
+
+con.clear()
+
+for (let f = 1; f <= 52; f++) {
+    let fname = `/movtestimg/${(''+f).padStart(3,'0')}.jpg`
+    filesystem.open("A", fname, "R")
+    let fileLen = filesystem.getFileLen("A")
+    dma.comToRam(0, 0, infile, fileLen)
+
+    graphics.decodeImageTo(infile, fileLen, imagearea)
+
+    graphics.imageToDisplayableFormat(imagearea, -1048577, 560, 448, 3, 2)
+
+}
+
+sys.free(imagearea)
+sys.free(infile)