Java tutorial
/* * * Part of the InfoGlue Content Management Platform (www.infoglue.org) * * * * Copyright (C) * * This program is free software; you can redistribute it and/or modify it under * the terms of the GNU General Public License version 2, as published by the * Free Software Foundation. See the file LICENSE.html for more information. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY, including the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along with * this program; if not, write to the Free Software Foundation, Inc. / 59 Temple * Place, Suite 330 / Boston, MA 02111-1307 / USA. * * */ import java.awt.Color; import java.awt.image.BufferedImage; import java.io.*; import java.util.*; public class GifEncoder { String b; int g; int a; int h; int f; int c[]; int i[]; int e[]; TreeSet d; private void a(int ai[], int j, DataOutputStream dataoutputstream) throws Exception { try { boolean flag2 = false; int l; int j3 = (1 << (l = j + 1)) - 1; int i2 = (1 << j) + 2; byte abyte0[] = new byte[255]; int ai1[] = new int[4096]; int ai2[] = new int[4096]; int ai3[] = new int[4096]; int ai4[] = new int[i2]; int k; for (k = 0; k < i2; k++) { ai4[k] = 0xffffffff | k; ai3[k] = -1; } for (; k < 4096; k++) { ai3[k] = -1; } System.arraycopy(ai3, 0, ai1, 0, 4096); System.arraycopy(ai3, 0, ai2, 0, 4096); System.arraycopy(ai4, 0, ai1, 0, i2); int j1 = ai[0]; k = 1; boolean flag1 = false; int j2 = 0; int k2 = (1 << l) - 1; boolean flag = true; int i3 = 0; int i1 = 0; j2 |= 1 << j + i3; for (i3 += l; i3 >= 8;) { try { abyte0[i1++] = (byte) j2; } catch (ArrayIndexOutOfBoundsException arrayindexoutofboundsexception) { dataoutputstream.writeByte(255); dataoutputstream.write(abyte0); abyte0[i1 = 0] = (byte) j2; i1++; } i3 -= 8; j2 >>= 8; } try { do { int k1; int l1 = j1 << 16 | (k1 = ai[k++]); int k3; for (k3 = j1; ai1[k3] != l1 && ai2[k3] >= 0; k3 = ai2[k3]) { } if (ai1[k3] != l1) { j2 |= j1 << i3; for (i3 += l; i3 >= 8;) { try { abyte0[i1++] = (byte) j2; } catch (ArrayIndexOutOfBoundsException arrayindexoutofboundsexception1) { dataoutputstream.writeByte(255); dataoutputstream.write(abyte0); abyte0[i1 = 0] = (byte) j2; i1++; } i3 -= 8; j2 >>= 8; } if (i2 > j3) { l++; j3 = (j3 << 1) + 1; } try { ai2[k3] = i2; ai1[i2++] = j1 << 16 | k1; j1 = k1; } catch (ArrayIndexOutOfBoundsException arrayindexoutofboundsexception2) { j1 = k1; l--; j2 |= 1 << j + i3; for (i3 += l; i3 >= 8;) { try { abyte0[i1++] = (byte) j2; } catch (ArrayIndexOutOfBoundsException arrayindexoutofboundsexception5) { dataoutputstream.writeByte(255); dataoutputstream.write(abyte0); abyte0[i1 = 0] = (byte) j2; i1++; } i3 -= 8; j2 >>= 8; } j3 = (1 << (l = j + 1)) - 1; i2 = (1 << j) + 2; int l2 = (1 << l) - 1; System.arraycopy(ai3, 0, ai1, 0, 4096); System.arraycopy(ai3, 0, ai2, 0, 4096); System.arraycopy(ai4, 0, ai1, 0, i2); } } else { j1 = k3; } } while (true); } catch (Exception exception) { j2 |= j1 << i3; } for (i3 += l; i3 >= 8;) { try { abyte0[i1++] = (byte) j2; } catch (ArrayIndexOutOfBoundsException arrayindexoutofboundsexception3) { dataoutputstream.writeByte(255); dataoutputstream.write(abyte0); abyte0[i1 = 0] = (byte) j2; i1++; } i3 -= 8; j2 >>= 8; } j2 |= (1 << j) + 1 << i3; for (i3 += l; i3 > 0;) { try { abyte0[i1++] = (byte) j2; } catch (ArrayIndexOutOfBoundsException arrayindexoutofboundsexception4) { dataoutputstream.writeByte(255); dataoutputstream.write(abyte0); abyte0[i1 = 0] = (byte) j2; i1++; } i3 -= 8; j2 >>= 8; } dataoutputstream.writeByte(i1); dataoutputstream.write(abyte0, 0, i1); dataoutputstream.writeByte(0); return; } catch (Exception e) { } } public void addTransparentColor(Color color) { try { if (f < 256) { c[f++] = color.getRGB(); } return; } catch (Exception e) { } } public void setTransparentColors(Vector vector) { try { Iterator iterator = vector.iterator(); while (iterator.hasNext()) { Color color = (Color) iterator.next(); addTransparentColor(color); } return; } catch (Exception e) { } } public void encode(BufferedImage bufferedimage, DataOutputStream dataoutputstream, Hashtable hashtable) throws Exception { try { a = bufferedimage.getWidth(); g = bufferedimage.getHeight(); e = bufferedimage.getRGB(0, 0, a, g, null, 0, a); int i4 = 0; b = hashtable.get("encoding").toString(); if (b.equals("websafe")) { int ai[] = new int[256]; i = new int[256]; h = 8; int k1 = 0; int j; int j1 = j = 0; for (; j <= 255; j += 51) { for (int l = 0; l <= 255; l += 51) { for (int i1 = 0; i1 <= 255;) { i[j1] = (j << 16) + (l << 8) + i1; ai[k1++] = j1; i1 += 51; j1++; } } } if (f > 0) { int j4 = c[0]; int l1 = ((c[0] >> 16 & 0xff) + 25) / 51; int k2 = ((c[0] >> 8 & 0xff) + 25) / 51; int j3 = ((c[0] & 0xff) + 25) / 51; i4 = l1 * 36 + k2 * 6 + j3; for (j = 1; j < f; j++) { int i2 = ((c[j] >> 16 & 0xff) + 25) / 51; int l2 = ((c[j] >> 8 & 0xff) + 25) / 51; int k3 = ((c[j] & 0xff) + 25) / 51; ai[i2 * 36 + l2 * 6 + k3] = i4; } } j = 0; try { do { int i5 = e[j]; int j2 = ((i5 >> 16 & 0xff) + 25) / 51; int i3 = ((i5 >> 8 & 0xff) + 25) / 51; int l3 = ((i5 & 0xff) + 25) / 51; e[j++] = ai[j2 * 36 + i3 * 6 + l3]; } while (true); } catch (Exception exception1) { } } /*else if(b.equals("optimized")) { try { int k4 = Integer.parseInt(hashtable.get("colors").toString()); for(h = 1; k4 - 1 >> h > 0; h++) { } i = new int[1 << h]; CSelectiveQuant cselectivequant = new CSelectiveQuant(); for(int j5 = 0; j5 < e.length; j5++) { cselectivequant.addPixel(e[j5]); } boolean flag = f > 0; int k5 = flag ? 1 : 0; int ai1[] = cselectivequant.createPalette(k4 - k5); for(int l5 = 0; l5 < i.length; l5++) { try { i[l5] = ai1[l5 - k5]; } catch(ArrayIndexOutOfBoundsException arrayindexoutofboundsexception) { i[l5] = 0; } } if(flag) { i4 = 0; for(int i6 = 0; i6 < f; i6++) { cselectivequant.setIndex(c[i6], -1); } } for(int j6 = 0; j6 < e.length; j6++) { e[j6] = cselectivequant.getIndex(e[j6]) + k5; } } catch(NumberFormatException numberformatexception) { CmsLogger.logInfo("Parameter: 'colors' is malformated..."); return; } } */ dataoutputstream.write("GIF89a".getBytes()); dataoutputstream.writeByte(a); dataoutputstream.writeByte(a >> 8); dataoutputstream.writeByte(g); dataoutputstream.writeByte(g >> 8); dataoutputstream.writeByte(0xf0 | h - 1); dataoutputstream.writeByte(0); dataoutputstream.writeByte(0); int k = 0; try { do { int l4 = i[k++]; dataoutputstream.writeByte(l4 >> 16 & 0xff); dataoutputstream.writeByte(l4 >> 8 & 0xff); dataoutputstream.writeByte(l4 & 0xff); } while (true); } catch (Exception exception) { } if (f > 0) { dataoutputstream.writeByte(33); dataoutputstream.writeByte(249); dataoutputstream.writeByte(4); dataoutputstream.writeByte(1); dataoutputstream.writeByte(0); dataoutputstream.writeByte(0); dataoutputstream.writeByte(i4); dataoutputstream.writeByte(0); } dataoutputstream.writeByte(44); dataoutputstream.writeByte(0); dataoutputstream.writeByte(0); dataoutputstream.writeByte(0); dataoutputstream.writeByte(0); dataoutputstream.writeByte(a); dataoutputstream.writeByte(a >> 8); dataoutputstream.writeByte(g); dataoutputstream.writeByte(g >> 8); dataoutputstream.writeByte(0); dataoutputstream.writeByte(h); a(e, h, dataoutputstream); dataoutputstream.writeByte(59); dataoutputstream.flush(); return; } catch (Exception e) { } } public GifEncoder() { f = 0; c = new int[256]; } }