summaryrefslogtreecommitdiffstats
path: root/src/jogl
diff options
context:
space:
mode:
Diffstat (limited to 'src/jogl')
-rw-r--r--src/jogl/classes/com/jogamp/opengl/util/texture/ImageIOUtil.java428
1 files changed, 428 insertions, 0 deletions
diff --git a/src/jogl/classes/com/jogamp/opengl/util/texture/ImageIOUtil.java b/src/jogl/classes/com/jogamp/opengl/util/texture/ImageIOUtil.java
new file mode 100644
index 000000000..e9e339a0c
--- /dev/null
+++ b/src/jogl/classes/com/jogamp/opengl/util/texture/ImageIOUtil.java
@@ -0,0 +1,428 @@
+/**
+ * Copyright 2014 JogAmp Community. 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 JogAmp Community ``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 JogAmp Community 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.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+package com.jogamp.opengl.util.texture;
+
+import java.io.BufferedInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+/**
+ * Utilities for image input and output
+ *
+ */
+public class ImageIOUtil {
+
+ public static String getFileSuffix(InputStream stream) throws IOException {
+ if (stream == null) {
+ throw new IOException("Stream was null");
+ }
+ if (!(stream instanceof BufferedInputStream)) {
+ stream = new BufferedInputStream(stream);
+ }
+ if (!stream.markSupported()) {
+ throw new IOException("Can not get non-destructively the image format");
+ }
+ if (stream.available() < 32) {
+ throw new IOException("Not enough bytes to read in order to get the image format");
+ }
+ try {
+ stream.mark(32);
+ final byte[] b = new byte[32];
+ stream.read(b);
+ return getFileSuffix(b);
+ } finally {
+ stream.reset();
+ }
+
+ }
+
+ public static String getFileSuffix(final byte[] b) {
+ /**
+ * http://www.faqs.org/faqs/jpeg-faq/part1/
+ * http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=54989
+ */
+ if ((b[0] == 0xff && b[1] == 0xd8 /* && b[2] == 0xff */)
+ || (b[0] == 0x4A && b[1] == 0x46 && b[2] == 0x49 && b[3] == 0x46)/* JFIF */
+ || (b[0] == 0x45 && b[1] == 0x78 && b[2] == 0x69 && b[3] == 0x66)/* EXIF */) {
+ return TextureIO.JPG;
+ }
+ /**
+ * http://www.libpng.org/pub/png/spec/1.1/PNG-Rationale.html#R.PNG-file-signature
+ */
+ if (b[0] == 0x89 && b[1] == 0x50 && b[2] == 0x4E && b[3] == 0x47 /* 'P' 'N' 'G', ascii code */
+ && b[4] == 0x0D && b[5] == 0x0A && b[6] == 0x1A && b[7] == 0x0A) {
+ return TextureIO.PNG;
+ }
+ /**
+ * Apple Icon Image
+ *
+ * 'i' 'c' 'n' 's' ascii code
+ */
+ if (b[0] == 0x69 && b[1] == 0x63 && b[2] == 0x6E && b[3] == 0x73) {
+ return "icns";
+ }
+ /**
+ * http://www.w3.org/Graphics/GIF/spec-gif87a.txt http://www.w3.org/Graphics/GIF/spec-gif89a.txt
+ *
+ * GIF87A or GIF89A ascii code
+ */
+ if (b[0] == 0x47 && b[1] == 0x49 && b[2] == 0x46 && b[3] == 0x38 && (b[4] == 0x37 || b[4] == 0x39)
+ && b[5] == 0x61) {
+ return TextureIO.GIF;
+ }
+ /**
+ * http://www.fileformat.info/format/bmp/spec/e27073c25463436f8a64fa789c886d9c/view.htm
+ *
+ * BM ascii code
+ */
+ if (b[0] == 0x42 && b[1] == 0x4d) {
+ return "bmp";
+ }
+ if (b[0] == 0x3A && b[1] == 0xDE && b[2] == 0x68 && b[3] == 0xB1) {
+ return "dcx";
+ }
+ if (b[0] == 0x0A && b[1] == 0x05 && b[2] == 0x01 && b[3] == 0x08) {
+ return "pcx";
+ }
+ /**
+ * http://netpbm.sourceforge.net/doc/ppm.html
+ */
+ if (b[0] == 0x50 && (b[1] == 0x33 /* plain */|| b[1] == 0x36)) {
+ return TextureIO.PPM;
+ }
+ if (b[0] == 0x38 && b[1] == 0x42 && b[2] == 0x50 && b[3] == 0x53 && b[4] == 0x00 && b[5] == 0x01
+ && b[6] == 0x00 && b[7] == 0x00 && b[8] == 0x00 && b[9] == 0x00) {
+ // Adobe PhotoShop
+ return "psd";
+ }
+ /**
+ * http://partners.adobe.com/public/developer/en/tiff/TIFF6.pdf
+ *
+ * intentionally detects only the little endian tiff images ("II" in the spec)
+ */
+ if (b[0] == 0x49 && b[1] == 0x49 && b[2] == 0x2A && b[3] == 0x00) {
+ return TextureIO.TIFF;
+ }
+ /**
+ * http://paulbourke.net/dataformats/sgirgb/sgiversion.html
+ *
+ * "474 saved as a short" 474 = 0x01DA
+ */
+ if (b[0] == 0x01 && b[1] == 0xDA /* && b[2] == 0x01 && b[3] == 0x01 && b[4] == 0x00 && b[5] == 0x03 */) {
+ return TextureIO.SGI_RGB;
+ }
+ /**
+ * 'D' 'D' 'S' ' ' ascii code
+ */
+ if (b[0] == 0x44 && b[1] == 0x44 && b[2] == 0x53 && b[3] == 0x20) {
+ return TextureIO.DDS;
+ }
+ /**
+ * http://netpbm.sourceforge.net/doc/pam.html
+ */
+ if (b[0] == 0x50 && b[1] == 0x37) {
+ return TextureIO.PAM;
+ }
+ /**
+ * http://netpbm.sourceforge.net/doc/pgm.html
+ */
+ if (b[0] == 0x50 && (b[1] == 0x32 /* plain */|| b[1] == 0x35)) {
+ return "pgm";
+ }
+ /**
+ * http://netpbm.sourceforge.net/doc/pbm.html
+ */
+ if (b[0] == 0x50 && (b[1] == 0x31 /* plain */|| b[1] == 0x34)) {
+ return "pbm";
+ }
+ if (b[0] == 0x3D && b[1] == 0x02) {
+ return "3d2";
+ }
+ if (b[0] == 0x33 && b[1] == 0x44 && b[2] == 0x4D && b[3] == 0x46) {
+ return "3dmf";
+ }
+ if (b[0] == 0x2A && b[1] == 0x2A && b[2] == 0x54 && b[3] == 0x49 && b[4] == 0x39 && b[5] == 0x32
+ && b[6] == 0x2A && b[7] == 0x2A && b[8] == 0x01 && b[9] == 0x00 && b[10] == 0x58
+ && b[11] == 0x6E && b[12] == 0x56 && b[13] == 0x69) {
+ return "92i";
+ }
+ if (b[0] == 0x41 && b[1] == 0x4D && b[2] == 0x46 && b[3] == 0x46) {
+ return "amff";
+ }
+ if (b[0] == 0x4A && b[1] == 0x47 && (b[2] == 0x03 || b[2] == 0x04) && b[3] == 0x0E && b[4] == 0x00
+ && b[5] == 0x00 && b[6] == 0x00) {
+ return "art";
+ }
+ if (b[0] == 0x73 && b[1] == 0x72 && b[2] == 0x63 && b[3] == 0x64 && b[4] == 0x6F && b[5] == 0x63
+ && b[6] == 0x69 && b[7] == 0x64 && b[8] == 0x3A) {
+ return "cals";
+ }
+ if (b[0] == 0x07 && b[1] == 0x20 && b[2] == 0x4D && b[3] == 0x4D) {
+ return "cam";
+ }
+ if (b[0] == 0x20 && b[1] == 0x77 && b[2] == 0x00 && b[3] == 0x02) {
+ return "cbd";
+ }
+ if (b[0] == 0x45 && b[1] == 0x59 && b[2] == 0x45 && b[3] == 0x53) {
+ return "ce2";
+ }
+ if (b[0] == 0x80 && b[1] == 0x2A && b[2] == 0x5F && b[3] == 0xD7 && b[4] == 0x00 && b[5] == 0x00
+ && b[6] == 0x08 && b[7] == 0x00 && b[8] == 0x00 && b[9] == 0x00 && b[10] == 0x04
+ && b[11] == 0x00 && b[12] == 0x00 && b[13] == 0x00) {
+ return "cin";
+ }
+ if (b[0] == 0x43 && b[1] == 0x61 && b[2] == 0x6C && b[3] == 0x69 && b[4] == 0x67 && b[5] == 0x61
+ && b[6] == 0x72 && b[7] == 0x69) {
+ return "cob";
+ }
+ if (b[0] == 0x43 && b[1] == 0x50 && b[2] == 0x54 && b[3] == 0x46 && b[4] == 0x49 && b[5] == 0x4C
+ && b[6] == 0x45) {
+ return "cpt";
+ }
+ if (b[0] == 0x43 && b[1] == 0x41 && b[2] == 0x4C && b[3] == 0x41 && b[4] == 0x4D && b[5] == 0x55
+ && b[6] == 0x53 && b[7] == 0x43 && b[8] == 0x56 && b[9] == 0x47) {
+ return "cvg";
+ }
+ if (b[0] == 0x56 && b[1] == 0x69 && b[2] == 0x73 && b[3] == 0x74 && b[4] == 0x61 && b[5] == 0x20
+ && b[6] == 0x44 && b[7] == 0x45 && b[8] == 0x4D && b[9] == 0x20 && b[10] == 0x46
+ && b[11] == 0x69 && b[12] == 0x6C && b[13] == 0x65) {
+ return "dem";
+ }
+ if (b[0] == 0x42 && b[1] == 0x4D && b[2] == 0x36) {
+ return "dib";
+ }
+ if (b[0] == 0x53 && b[1] == 0x44 && b[2] == 0x50 && b[3] == 0x58) {
+ return "dpx";
+ }
+ if (b[0] == 0x01 && b[1] == 0xFF && b[2] == 0x02 && b[3] == 0x04 && b[4] == 0x03 && b[5] == 0x02) {
+ return "drw";
+ }
+ if (b[0] == 0x41 && b[1] == 0x43 && b[2] == 0x31 && b[3] == 0x30) {
+ return "dwg";
+ }
+ if (b[0] == 0x65 && b[1] == 0x02 && b[2] == 0x01 && b[3] == 0x02) {
+ return "ecw";
+ }
+ if (b[0] == 0x01 && b[1] == 0x00 && b[2] == 0x00 && b[3] == 0x00 && b[4] == 0x58 && b[5] == 0x00
+ && b[6] == 0x00 && b[7] == 0x00) {
+ return "emf";
+ }
+ if (b[0] == 0xD0 && b[1] == 0xCF && b[2] == 0x11 && b[3] == 0xE0 && b[4] == 0xA1 && b[5] == 0xB1
+ && b[6] == 0x1A && b[7] == 0xE1 && b[8] == 0x00) {
+ return "fpx";
+ }
+ if (b[0] == 0x53 && b[1] == 0x49 && b[2] == 0x4D && b[3] == 0x50 && b[4] == 0x4C && b[5] == 0x45
+ && b[6] == 0x20 && b[7] == 0x20 && b[8] == 0x3D) {
+ return "fts";
+ }
+ if (b[0] == 0x48 && b[1] == 0x50 && b[2] == 0x48 && b[3] == 0x50 && b[4] == 0x34 && b[5] == 0x38
+ && b[6] == 0x2D && b[7] == 0x45 && b[8] == 0x1E && b[9] == 0x2B) {
+ return "gro";
+ }
+ if (b[0] == 0x6E && b[1] == 0x63 && b[2] == 0x6F && b[3] == 0x6C && b[4] == 0x73) {
+ return "hdr";
+ }
+ if (b[0] == 0x35 && b[1] == 0x4B && b[2] == 0x50 && b[3] == 0x35 && b[4] == 0x31 && b[5] == 0x5D
+ && b[6] == 0x2A && b[7] == 0x67 && b[8] == 0x72 && b[9] == 0x72 && b[10] == 0x80
+ && b[11] == 0x83 && b[12] == 0x85 && b[13] == 0x63) {
+ return "hru";
+ }
+ if (b[0] == 0xEB && b[1] == 0x3C && b[2] == 0x90 && b[3] == 0x2A) {
+ return "img";
+ }
+ if (b[0] == 0x65 && b[1] == 0x6C && b[2] == 0x6D && b[3] == 0x6F) {
+ return "infini-d";
+ }
+ if (b[0] == 0x49 && b[1] == 0x57 && b[2] == 0x43 && b[3] == 0x01) {
+ return "iwc";
+ }
+ if (b[0] == 0x80 && b[1] == 0x3E && b[2] == 0x44 && b[3] == 0x53 && b[4] == 0x43 && b[5] == 0x49
+ && b[6] == 0x4D) {
+ return "j6i";
+ }
+ if (b[0] == 0x4A && b[1] == 0x49 && b[2] == 0x46 && b[3] == 0x39 && b[4] == 0x39 && b[5] == 0x61) {
+ return "jif";
+ }
+ if (b[0] == 0x00 && b[1] == 0x00 && b[2] == 0x00 && b[3] == 0x0C && b[4] == 0x6A && b[5] == 0x50
+ && b[6] == 0x20 && b[7] == 0x20 && b[8] == 0x0D && b[9] == 0x0A && b[10] == 0x87
+ && b[11] == 0x0A) {
+ return "jp2";
+ }
+ if (b[0] == 0x4D && b[1] == 0x4D && b[2] == 0x00 && b[3] == 0x2A) {
+ return "kdc";
+ }
+ if (b[0] == 0x36 && b[1] == 0x34 && b[2] == 0x4C && b[3] == 0x41 && b[4] == 0x4E && b[5] == 0x20
+ && b[6] == 0x49 && b[7] == 0x44 && b[8] == 0x42 && b[9] == 0x4C && b[10] == 0x4F
+ && b[11] == 0x43 && b[12] == 0x4B) {
+ return "l64";
+ }
+ if (b[0] == 0x46 && b[1] == 0x4F && b[2] == 0x52 && b[3] == 0x4D) {
+ return "lbm";
+ }
+ if (b[0] == 0x49 && b[1] == 0x49 && b[2] == 0x2A && b[3] == 0x00 && b[4] == 0x08 && b[5] == 0x00
+ && b[6] == 0x00 && b[7] == 0x00 && b[8] == 0x0E && b[9] == 0x00 && b[10] == 0x00
+ && b[11] == 0x01 && b[12] == 0x04 && b[13] == 0x00) {
+ return "ldf";
+ }
+ if (b[0] == 0x57 && b[1] == 0x56 && b[2] == 0x02 && b[3] == 0x00 && b[4] == 0x47 && b[5] == 0x45
+ && b[6] == 0x00 && b[7] == 0x0E) {
+ return "lwf";
+ }
+ if (b[0] == 0x37 && b[1] == 0x00 && b[2] == 0x00 && b[3] == 0x10 && b[4] == 0x42 && b[5] == 0x00
+ && b[6] == 0x00 && b[7] == 0x10 && b[8] == 0x00 && b[9] == 0x00 && b[10] == 0x00
+ && b[11] == 0x00 && b[12] == 0x39 && b[13] == 0x64) {
+ return "mbm";
+ }
+ if (b[0] == 0x4D && b[1] == 0x47 && b[2] == 0x4C) {
+ return "mgl";
+ }
+ if (b[0] == 0x7B && b[1] == 0x0A && b[2] == 0x20 && b[3] == 0x20 && b[4] == 0x43 && b[5] == 0x72
+ && b[6] == 0x65 && b[7] == 0x61 && b[8] == 0x74 && b[9] == 0x65 && b[10] == 0x64) {
+ return "mif";
+ }
+ if (b[0] == 0x8A && b[1] == 0x4D && b[2] == 0x4E && b[3] == 0x47 && b[4] == 0x0D && b[5] == 0x0A
+ && b[6] == 0x1A && b[7] == 0x0A) {
+ return "mng";
+ }
+ if (b[0] == 0x4D && b[1] == 0x50 && b[2] == 0x46) {
+ return "mpw";
+ }
+ if (b[0] == 0x44 && b[1] == 0x61 && b[2] == 0x6E && b[3] == 0x4D) {
+ return "msp";
+ }
+ if (b[0] == 0x43 && b[1] == 0x36 && b[2] == 0x34) {
+ return "n64";
+ }
+ if (b[0] == 0x6E && b[1] == 0x6E && b[2] == 0x0A && b[3] == 0x00 && b[4] == 0x5E && b[5] == 0x00) {
+ return "ncr";
+ }
+ if (b[0] == 0x6E && b[1] == 0x66 && b[2] == 0x66) {
+ return "nff";
+ }
+ if (b[0] == 0x4E && b[1] == 0x47 && b[2] == 0x47 && b[3] == 0x00 && b[4] == 0x01 && b[5] == 0x00) {
+ return "ngg";
+ }
+ if (b[0] == 0x4E && b[1] == 0x4C && b[2] == 0x4D && b[3] == 0x20 && b[4] == 0x01 && b[5] == 0x02
+ && b[6] == 0x00) {
+ return "nlm";
+ }
+ if (b[0] == 0x4E && b[1] == 0x4F && b[2] == 0x4C && b[3] == 0x00 && b[4] == 0x01 && b[5] == 0x00
+ && b[6] == 0x06 && b[7] == 0x01 && b[8] == 0x03 && b[9] == 0x00) {
+ return "nol";
+ }
+ if (b[0] == 0x41 && b[1] == 0x48) {
+ return "pal";
+ }
+ if (b[0] == 0x50 && b[1] == 0x41 && b[2] == 0x58) {
+ return "pax";
+ }
+ if (b[0] == 0x63 && b[1] == 0x52 && b[2] == 0x01 && b[3] == 0x01 && b[4] == 0x38 && b[5] == 0x09
+ && b[6] == 0x3D && b[7] == 0x00) {
+ return "pcd";
+ }
+ if (b[0] == 0x1B && b[1] == 0x45 && b[2] == 0x1B && b[3] == 0x26 && b[4] == 0x6C && b[5] == 0x30
+ && b[6] == 0x4F && b[7] == 0x1B && b[8] == 0x26 && b[9] == 0x6C && b[10] == 0x30
+ && b[11] == 0x45 && b[12] == 0x1B && b[13] == 0x26) {
+ return "pcl";
+ }
+ if (b[0] == 0x50 && b[1] == 0x49 && b[2] == 0x58 && b[3] == 0x20) {
+ return "pix";
+ }
+ if (b[0] == 0x50 && b[1] == 0x4F && b[2] == 0x4C && b[3] == 0x20 && b[4] == 0x46 && b[5] == 0x6F
+ && b[6] == 0x72 && b[7] == 0x6D && b[8] == 0x61 && b[9] == 0x74) {
+ return "pol";
+ }
+ // Paint Shop Pro
+ if (b[0] == 0x7E && b[1] == 0x42 && b[2] == 0x4B && b[3] == 0x00) {
+ return "psp";
+ }
+ if (b[0] == 0x50 && b[1] == 0x61 && b[2] == 0x69 && b[3] == 0x6E && b[4] == 0x74 && b[5] == 0x20
+ && b[6] == 0x53 && b[7] == 0x68 && b[8] == 0x6F && b[9] == 0x70 && b[10] == 0x20
+ && b[11] == 0x50 && b[12] == 0x72 && b[13] == 0x6F && b[14] == 0x20 && b[15] == 0x49
+ && b[16] == 0x6D && b[17] == 0x61 && b[18] == 0x67 && b[19] == 0x65 && b[20] == 0x20
+ && b[21] == 0x46 && b[22] == 0x69 && b[23] == 0x6C && b[24] == 0x65) {
+ return "psp";
+ }
+ if (b[0] == 0x51 && b[1] == 0x4C && b[2] == 0x49 && b[3] == 0x49 && b[4] == 0x46 && b[5] == 0x41
+ && b[6] == 0x58) {
+ return "qfx";
+ }
+ if (b[0] == 0x6D && b[1] == 0x6F && b[2] == 0x6F && b[3] == 0x76) {
+ return "qtm";
+ }
+ if (b[0] == 0x46 && b[1] == 0x4F && b[2] == 0x52 && b[3] == 0x4D && b[4] == 0x41 && b[5] == 0x54
+ && b[6] == 0x3D) {
+ return "rad";
+ }
+ if (b[0] == 0x59 && b[1] == 0xA6 && b[2] == 0x6A && b[3] == 0x95) {
+ return "ras";
+ }
+ if (b[0] == 0x52 && b[1] == 0x49 && b[2] == 0x58 && b[3] == 0x33) {
+ return "rix";
+ }
+ if (b[0] == 0x23 && b[1] == 0x20 && b[2] == 0x24 && b[3] == 0x49 && b[4] == 0x64 && b[5] == 0x3A
+ && b[6] == 0x20) {
+ return "sid";
+ }
+ if (b[0] == 0x41 && b[1] == 0x75 && b[2] == 0x74 && b[3] == 0x6F && b[4] == 0x43 && b[5] == 0x41
+ && b[6] == 0x44 && b[7] == 0x20 && b[8] == 0x53 && b[9] == 0x6C && b[10] == 0x69
+ && b[11] == 0x64 && b[12] == 0x65) {
+ return "sld";
+ }
+ if (b[0] == 0x53 && b[1] == 0x74 && b[2] == 0x6F && b[3] == 0x72 && b[4] == 0x6D && b[5] == 0x33
+ && b[6] == 0x44) {
+ return "sod";
+ }
+ if (b[0] == 0xFA && b[1] == 0xDE && b[2] == 0xBA && b[3] == 0xBE && b[4] == 0x01 && b[5] == 0x01) {
+ return "wic";
+ }
+ if (b[0] == 0xD3 && b[1] == 0x23 && b[2] == 0x00 && b[3] == 0x00 && b[4] == 0x03 && b[5] == 0x00
+ && b[6] == 0x00 && b[7] == 0x00) {
+ return "wlm";
+ }
+ if (b[0] == 0xD7 && b[1] == 0xCD && b[2] == 0xC6 && b[3] == 0x9A) {
+ return "wmf";
+ }
+ if (b[0] == 0xFF && b[1] == 0x57 && b[2] == 0x50 && b[3] == 0x43 && b[4] == 0x10) {
+ return "wpg";
+ }
+ if (b[0] == 0x23 && b[1] == 0x56 && b[2] == 0x52 && b[3] == 0x4D && b[4] == 0x4C && b[5] == 0x20
+ && b[6] == 0x56 && b[7] == 0x32 && b[8] == 0x2E && b[9] == 0x30) {
+ return "wrl";
+ }
+ if (b[0] == 0x23 && b[1] == 0x64 && b[2] == 0x65 && b[3] == 0x66 && b[4] == 0x69 && b[5] == 0x6E
+ && b[6] == 0x65) {
+ return "xbm";
+ }
+ if (b[0] == 0x2F && b[1] == 0x2A && b[2] == 0x20 && b[3] == 0x58 && b[4] == 0x50 && b[5] == 0x4D
+ && b[6] == 0x20 && b[7] == 0x2A && b[8] == 0x2F) {
+ return "xpm";
+ }
+ return null;
+ }
+}