JAL-1807 Bob's first commit -- Applet loaded; needs image

[jalview.git] / src / javajs / img / PpmEncoder.java

diff --git a/src/javajs/img/PpmEncoder.java b/src/javajs/img/PpmEncoder.java
new file mode 100644 (file)
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+++ b/src/javajs/img/PpmEncoder.java
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+// PpmEncoder - write out an image as a PPM
+//
+// Copyright (C)1996,1998 by Jef Poskanzer <jef@mail.acme.com>. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+// Visit the ACME Labs Java page for up-to-date versions of this and other
+// fine Java utilities: http://www.acme.com/java/
+
+package javajs.img;
+
+import java.util.Map;
+
+
+/**
+ * see http://netpbm.sourceforge.net/doc/ppm.html
+ */
+public class PpmEncoder extends ImageEncoder {
+
+  @Override
+  protected void setParams(Map<String, Object> params) {
+    // no params
+  }
+
+  @Override
+  protected void generate() {
+    putString("P6\n");
+    putString(width + " " + height + "\n");
+    putString("255\n");
+    byte[] ppmPixels = new byte[width * 3];
+    for (int pt = 0, row = 0; row < height; ++row) {
+      for (int col = 0, j = 0; col < width; ++col, pt++) {
+        int p = pixels[pt];
+        ppmPixels[j++] = (byte) ((p >> 16) & 0xff);
+        ppmPixels[j++] = (byte) ((p >> 8) & 0xff);
+        ppmPixels[j++] = (byte) (p & 0xff);
+      }
+      out.write(ppmPixels, 0, ppmPixels.length);
+    }
+  }
+}