X-Git-Url: http://dolda2000.com/gitweb/?a=blobdiff_plain;f=src%2Fkaka%2Fcakelight%2FLedFrame.java;h=ac3341d1793cc53996a83aa0b2fae4da9392f61e;hb=6e568391dad1a1c47b5697a2f1ef90a685859a84;hp=ab4ef5c9fa12bb825fc2a266538232c9b5d0de44;hpb=38c759f87fc7de47d9dee60088f2dbc60e0a55fb;p=kaka%2Fcakelight.git

diff --git a/src/kaka/cakelight/LedFrame.java b/src/kaka/cakelight/LedFrame.java
index ab4ef5c..ac3341d 100644
--- a/src/kaka/cakelight/LedFrame.java
+++ b/src/kaka/cakelight/LedFrame.java
@@ -1,39 +1,74 @@
 package kaka.cakelight;
 
+import java.util.Arrays;
+
 public class LedFrame {
     private Configuration config;
     private byte[] bytes;
-    private int roff = 0, goff = 2, boff = 1; // Color values are stored as RBG, which is what the LED list takes.
+    private int start, stride;
+    private int roff, goff, boff; // RGB offsets
 
     public static LedFrame from(Configuration config) {
         LedFrame frame = new LedFrame();
         frame.config = config;
-        frame.bytes = new byte[config.leds.getCount() * 3];
+        switch (config.leds.type) {
+            /*
+             * The WS2801 strip takes its input as a plain list of 24-bit colors in RBG order (at least mine did).
+             */
+            case WS2801:
+		frame.start = 0;
+                frame.stride = 3;
+                frame.roff = 0;
+                frame.goff = 2;
+                frame.boff = 1;
+                frame.bytes = new byte[config.leds.getCount() * frame.stride];
+                break;
+
+            /*
+             * The APA102 strip takes its input as:
+             * <ol>
+             * <li>a start frame of 4 bytes (all zeroes)</li>
+             * <li>a frame of 4 bytes for each LED (111 (3 bits) + global illumination (5 bits) + BGR)</li>
+             * <li>an (optional) end frame of 4 bytes (all ones)</li>
+             * </ol>
+             */
+            case APA102:
+		frame.start = 4;
+                frame.stride = 4;
+                frame.roff = 3;
+                frame.goff = 2;
+                frame.boff = 1;
+                frame.bytes = new byte[4 + config.leds.getCount() * frame.stride + 4 * 2]; // 1 end frame doesn't seem to work, so we add another
+                Arrays.fill(frame.bytes, 4, frame.bytes.length - 9, (byte)(0b11100000 | config.leds.brightness)); // Initiate the first byte of each LED
+                Arrays.fill(frame.bytes, frame.bytes.length - 9, frame.bytes.length, (byte)0xff); // Initiate the end frame(s) with ones
+                break;
+        }
         return frame;
     }
 
-    public void fillColor(int r, int g, int b) {
-        fillColor(Color.rgb(r, g, b));
+    public LedFrame fillColor(int r, int g, int b) {
+        return fillColor(Color.rgb(r, g, b));
     }
 
-    public void fillColor(Color color) {
+    public LedFrame fillColor(Color color) {
         byte r = (byte)color.r(), g = (byte)color.g(), b = (byte)color.b(); // Gamma corrected values
-        for (int i = 0; i < bytes.length; i += 3) {
+        for (int i = start, max = start + config.leds.getCount() * stride; i < max; i += stride) {
             bytes[i + roff] = r;
             bytes[i + goff] = g;
             bytes[i + boff] = b;
         }
+	return this;
     }
 
     public void setLedColor(int led, Color color) {
-        int offset = led * 3;
+        int offset = start + led * stride;
         bytes[offset + roff] = (byte)color.r();
         bytes[offset + goff] = (byte)color.g();
         bytes[offset + boff] = (byte)color.b();
     }
 
     public Color getLedColor(int led) {
-        int offset = led * 3;
+        int offset = start + led * stride;
         return Color.rgb(
                 bytes[offset + roff] & 0xff,
                 bytes[offset + goff] & 0xff,