推荐开源项目：gifencoder，轻量级的Java GIF创建库

最新推荐文章于 2025-04-11 10:23:09 发布
原创 最新推荐文章于 2025-04-11 10:23:09 发布 · 861 阅读 · 7 ·
CC 4.0 BY-SA版权
版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。

推荐开源项目：gifencoder，轻量级的Java GIF创建库

项目地址:https://gitcode.com/gh_mirrors/gi/gifencoder

在数字化时代，动画GIF因其兼容性强大和便于分享的特点，在网页设计、社交媒体以及日常通信中扮演着不可或缺的角色。今天，我们来深入探讨一款名为gifencoder的纯Java库，它为开发者提供了一个高效、跨平台的解决方案，专为那些希望在应用中集成GIF动态图像功能的开发人员而设计。

项目介绍

gifencoder是一个严格按照GIF89a规范编写的Java库。它的一大亮点在于完全不依赖AWT中的BufferedImage，这意味着无论是在Android平台上还是其他缺少AWT环境的系统上，都能轻松使用此库来创建GIF动画。尽管当前版本暂不支持透明度，但其强大的色彩管理和动画生成能力已经足以满足大部分需求。

技术分析

gifencoder的核心技术在于其对图像的量化处理与抖动算法的应用。面对超过256色的图像，它默认采用中值切割量化策略，并结合了Floyd-Steinberg抖动，这一组合能够有效减少颜色数量的同时，保持图像视觉上的平滑过渡，减少“块状”效果。此外，项目提供了多种量化器与抖动器供选择，甚至允许开发者自定义实现，展现出极高的灵活性。

应用场景

  • 移动应用开发：对于Android开发者来说，gifencoder是添加动态元素的理想工具，特别是在制作教程动画、表情包或者游戏界面反馈时。
  • Web开发：轻松地将一系列图片转化为GIF动画，用于网站或博客的内容展示，增加互动性和趣味性。
  • 图形设计自动化：设计师可以利用此库自动化创建图标动画或示例演示，提高工作效率。

项目特点

  1. 跨平台性：不受AWT限制，支持包括Android在内的所有Java运行环境。
  2. 高度定制：通过调整量化方法和抖动算法，满足不同视觉质量的需求。
  3. 简洁API：简单直观的API设计使得快速整合到现有项目变得非常容易，如上述基本使用案例所示。
  4. 开源共享：遵循Apache 2.0许可协议，社区贡献和支持活跃。

结语

gifencoder以其实用性、易用性和广泛的适用场景，成为任何需要处理GIF动画的Java开发者必备的工具箱之一。无论是要增强应用的用户体验，还是简化图形创作流程，这个项目都值得一试。立即加入gifencoder的使用者行列，开启你的动态图像创意之旅吧！

为了方便您快速开始，gifencoder可以通过Gradle或Maven轻松集成，或是直接下载最新JAR文件。这个开源宝藏正等待每一位开发者去发掘它的潜力，让GIF创造变得更加便捷高效。让我们一起探索、应用并享受gifencoder带来的无限可能！

gifencoder A pure Java library implementing the GIF89a specification. Suitable for use on Android. gifencoder 项目地址: https://gitcode.com/gh_mirrors/gi/gifencoder

创作声明：本文部分内容由AI辅助生成（AIGC），仅供参考

java animatedgifencoder_Java技术:Gif编码器(gifencoder)的实际应用(1)
weixin_39605840的博客
03-06 837
Gif编码器 gifencoder本来想搜一下视频转Gif的相关框架的，找到了一个用JavaScript写 https://github.com/vvo/gifify ，但是我在安装其配置需求 ImageMagick 时发现 用命令$ brew install imagemagick --with-fontconfig时，安装到最后总是卡住了，去掉--with-fontconfig安装倒是能装进...
gifencoder,实现gif89a规范的纯java库。适合在android上使用。.zip
10-12
《深入理解GifEncoder：基于GIF89a规范的纯Java实现》 在移动开发领域，尤其是在Android平台上，由于其独特的系统架构，许多在Java SE环境下常用的图形处理库并不能直接应用。`gifencoder`正是为了解决这个问题而...
gifencoder:实现GIF89a规范的纯Java库。 适用于Android
04-22
gifencoder gifencoder是实现的纯Java库。 它不使用AWT的BufferedImage ，因此可以在Android和其他缺少AWT的平台上使用。 当前不支持透明度。 量化和抖动 GIF图像限制为256色。 如果您提供颜色更多的图像，则gifencoder的默认行为是使用进行。 您可以通过ImageOptions配置此行为。 提供了一些量化器和抖动器，但是您也可以插入自己的实现。 基本用法 int [][] rgbDataFrame1 = ... ; int [][] rgbDataFrame2 = ... ; int [][] rgbDataFrame3 = ... ; OutputStream outputStream = new FileOutputStream ( " test.gif " ); ImageOptions options = new Imag
gifdecoder.java_GifDecoder.java源码（处理GIF图片）
weixin_29527111的博客
02-13 223
importjava.net.*;importjava.io.*;importjava.util.*;importjava.awt.*;importjava.awt.image.*;publicclassGifDecoder{/***Filereadstatus:Noerrors.*/publicstaticfinalintSTATUS_OK=0;/***F...
GIFEncoder 使用教程
最新发布
gitblog_01072的博客
04-11 502
GIFEncoder 使用教程 gifencoder Server side animated gif generation for node.js 项目地址: https://gitcode.com/gh_mirrors/gif...
推荐开源项目：gifencoder - 纯Java GIF编码库
gitblog_00073的博客
05-18 657
推荐开源项目：gifencoder - 纯Java GIF编码库 gifencoderA pure Java library implementing the GIF89a specification. Suitable for use on Android.项目地址:https://gitcode.com/gh_mirrors/gi/gifencoder 1、项目介绍 gifencoder是一...
GifDecoder.java源码（处理GIF图片）
fantao963的专栏
09-20 1366
GifDecoder.java源码（处理GIF图片）   import java.net.*;import java.io.*;import java.util.*;import java.awt.*;import java.awt.image.*;public class GifDecoder { /**  * File read status: No e
JSGIF: 轻量级GIF制作与编码库
综上所述，jsgif库是一个针对HTML5画布与JavaScript环境开发的简易GIF动画创建库。它允许用户直接在浏览器端创建GIF动画，尽管在解码方面支持有限，但对于需要快速生成基础GIF动画的Web应用来说，这已经是一个非常...
gifencoder:用于node.js的服务器端动画gif生成
05-25
用于node.js的流式服务器端动画（和非动画）gif生成 安装 该模块通过npm安装： $ npm install gifencoder 流API-具有写入功能的双工管道 您还可以将像素数据（或画布上下文）的写入内容流式传输到编码器： const...
PHP使用GIFEncoder类处理gif图片实例
10-25
通过创建GIFEncoder类的实例，我们可以加载一个GIF文件并对其进行处理。实例化GIFEncoder对象后，我们通过调用load方法载入要解码的GIF图像。 GIF图像由多个帧组成，每帧包含图像数据。在PHP中可以利用GD库来处理...
GIFEncoder
TTS
12-10 140
// Imports the GIFEndocer class by Thibault Imbert. // You can download it from ByteArray.org. import org.gif.encoder.GIFEncoder; var serverPath:String = "/"; // Initializes GIFEncoder v...
jsGifEncoder:超快速GIF编码器，用于以JavaScript编写的数据URL
05-04
布局 标题 图像 家 jsGifEncoder-用于以JavaScript编写的数据URL的超快速GIF编码器 资产/favimage-472x472.jpg [点击图像启动编码器] jsGifEncoder 超快速GIF编码器，用于以JavaScript编写的数据URL。 在这里尝试演示： : 欢迎来到数据URL的奇妙世界 该代码创建于2011年5月，旨在创建和加载动画图像。 输出是rfc2397中描述的数据URL方案。 编码器由 用法 调用示例： let encoder = new GifEncoder ( width , height ) ; let data = encoder . encode ( bpp , red , green , blue , pixels ) ; 注入HTML： document . get
AnimatedGifEncoder
01-02
AnimatedGifEncoder,LZWEncoder,,NeuQuant的源码，打了个jar包。虽然网上已经有不少了，但比较零碎，这次整理下，可以不用在去找了
GIFEncoder.js
08-28
通过js生成GIF动画
GifDecoder
03-08
package org.hds.Graphics; import java.net.*; import java.io.*; import java.util.*; import java.awt.*; import java.awt.image.*; public class GifDecoder { /** * File read status: No errors. */ public static final int STATUS_OK = 0; /** * File read status: Error decoding file (may be partially decoded) */ public static final int STATUS_FORMAT_ERROR = 1; /** * File read status: Unable to open source. */ public static final int STATUS_OPEN_ERROR = 2; protected BufferedInputStream in; protected int status; protected int width; // full image width protected int height; // full image height protected boolean gctFlag; // global color table used protected int gctSize; // size of global color table protected int loopCount = 1; // iterations; 0 = repeat forever protected int[] gct; // global color table protected int[] lct; // local color table protected int[] act; // active color table protected int bgIndex; // background color index protected int bgColor; // background color protected int lastBgColor; // previous bg color protected int pixelAspect; // pixel aspect ratio protected boolean lctFlag; // local color table flag protected boolean interlace; // interlace flag protected int lctSize; // local color table size protected int ix, iy, iw, ih; // current image rectangle protected Rectangle lastRect; // last image rect protected BufferedImage image; // current frame protected BufferedImage lastImage; // previous frame protected byte[] block = new byte[256]; // current data block protected int blockSize = 0; // block size // last graphic control extension info protected int dispose = 0; // 0=no action; 1=leave in place; 2=restore to bg; 3=restore to prev protected int lastDispose = 0; protected boolean transparency = false; // use transparent color protected int delay = 0; // delay in milliseconds protected int totaldelay = 0; // delay in milliseconds protected int transIndex; // transparent color index protected static final int MaxStackSize = 4096; // max decoder pixel stack size // LZW decoder working arrays protected short[] prefix; protected byte[] suffix; protected byte[] pixelStack; protected byte[] pixels; protected ArrayList frames; // frames read from current file protected int frameCount; static class GifFrame { public GifFrame(BufferedImage im, int del) { image = im; delay = del; } public BufferedImage image; public int delay; } /** * Gets display duration for specified frame. * * @param n int index of frame * @return delay in milliseconds */ public int getDelay(int n) { // delay = -1; if ((n >= 0) && (n < frameCount)) { delay = ((GifFrame) frames.get(n)).delay; } return delay; } /** * Gets the number of frames read from file. * @return frame count */ public int getFrameCount() { return frameCount; } /** * Gets the number of frames read from file. * @return frame count */ public int gettotaldelay() { return totaldelay; } /** * Gets the first (or only) image read. * * @return BufferedImage containing first frame, or null if none. */ public BufferedImage getImage() { return getFrame(0); } /** * Gets the "Netscape" iteration count, if any. * A count of 0 means repeat indefinitiely. * * @return iteration count if one was specified, else 1. */ public int getLoopCount() { return loopCount; } /** * Creates new frame image from current data (and previous * frames as specified by their disposition codes). */ protected void setPixels() { // expose destination image's pixels as int array int[] dest = ((DataBufferInt) image.getRaster().getDataBuffer()).getData(); // fill in starting image contents based on last image's dispose code if (lastDispose > 0) { if (lastDispose == 3) { // use image before last int n = frameCount - 2; if (n > 0) { lastImage = getFrame(n - 1); } else { lastImage = null; } } if (lastImage != null) { int[] prev = ((DataBufferInt) lastImage.getRaster().getDataBuffer()).getData(); System.arraycopy(prev, 0, dest, 0, width * height); // copy pixels if (lastDispose == 2) { // fill last image rect area with background color Graphics2D g = image.createGraphics(); Color c = null; if (transparency) { c = new Color(0, 0, 0, 0); // assume background is transparent } else { c = new Color(lastBgColor); // use given background color } g.setColor(c); g.setComposite(AlphaComposite.Src); // replace area g.fill(lastRect); g.dispose(); } } } // copy each source line to the appropriate place in the destination int pass = 1; int inc = 8; int iline = 0; for (int i = 0; i < ih; i++) { int line = i; if (interlace) { if (iline >= ih) { pass++; switch (pass) { case 2 : iline = 4; break; case 3 : iline = 2; inc = 4; break; case 4 : iline = 1; inc = 2; } } line = iline; iline += inc; } line += iy; if (line < height) { int k = line * width; int dx = k + ix; // start of line in dest int dlim = dx + iw; // end of dest line if ((k + width) < dlim) { dlim = k + width; // past dest edge } int sx = i * iw; // start of line in source while (dx < dlim) { // map color and insert in destination int index = ((int) pixels[sx++]) & 0xff; int c = act[index]; if (c != 0) { dest[dx] = c; } dx++; } } } } /** * Gets the image contents of frame n. * * @return BufferedImage representation of frame, or null if n is invalid. */ public BufferedImage getFrame(int n) { BufferedImage im = null; if ((n >= 0) && (n < frameCount)) { im = ((GifFrame) frames.get(n)).image; } return im; } /** * Gets image size. * * @return GIF image dimensions */ public Dimension getFrameSize() { return new Dimension(width, height); } /** * Reads GIF image from stream * * @param BufferedInputStream containing GIF file. * @return read status code (0 = no errors) */ public int read(BufferedInputStream is) { init(); if (is != null) { in = is; readHeader(); if (!err()) { readContents(); if (frameCount < 0) { status = STATUS_FORMAT_ERROR; } } } else { status = STATUS_OPEN_ERROR; } try { is.close(); } catch (IOException e) { } return status; } /** * Reads GIF image from stream * * @param InputStream containing GIF file. * @return read status code (0 = no errors) */ public int read(InputStream is) { init(); if (is != null) { if (!(is instanceof BufferedInputStream)) is = new BufferedInputStream(is); in = (BufferedInputStream) is; readHeader(); if (!err()) { readContents(); if (frameCount < 0) { status = STATUS_FORMAT_ERROR; } } } else { status = STATUS_OPEN_ERROR; } try { is.close(); } catch (IOException e) { } return status; } /** * Reads GIF file from specified file/URL source * (URL assumed if name contains ":/" or "file:") * * @param name String containing source * @return read status code (0 = no errors) */ public int read(String name) { status = STATUS_OK; try { name = name.trim().toLowerCase(); if ((name.indexOf("file:") >= 0) || (name.indexOf(":/") > 0)) { URL url = new URL(name); in = new BufferedInputStream(url.openStream()); } else { in = new BufferedInputStream(new FileInputStream(name)); } status = read(in); } catch (IOException e) { status = STATUS_OPEN_ERROR; } return status; } /** * Decodes LZW image data into pixel array. * Adapted from John Cristy's ImageMagick. */ protected void decodeImageData() { int NullCode = -1; int npix = iw * ih; int available, clear, code_mask, code_size, end_of_information, in_code, old_code, bits, code, count, i, datum, data_size, first, top, bi, pi; if ((pixels == null) || (pixels.length < npix)) { pixels = new byte[npix]; // allocate new pixel array } if (prefix == null) prefix = new short[MaxStackSize]; if (suffix == null) suffix = new byte[MaxStackSize]; if (pixelStack == null) pixelStack = new byte[MaxStackSize + 1]; // Initialize GIF data stream decoder. data_size = read(); clear = 1 << data_size; end_of_information = clear + 1; available = clear + 2; old_code = NullCode; code_size = data_size + 1; code_mask = (1 << code_size) - 1; for (code = 0; code < clear; code++) { prefix[code] = 0; suffix[code] = (byte) code; } // Decode GIF pixel stream. datum = bits = count = first = top = pi = bi = 0; for (i = 0; i < npix;) { if (top == 0) { if (bits < code_size) { // Load bytes until there are enough bits for a code. if (count == 0) { // Read a new data block. count = readBlock(); if (count <= 0) break; bi = 0; } datum += (((int) block[bi]) & 0xff) << bits; bits += 8; bi++; count--; continue; } // Get the next code. code = datum & code_mask; datum >>= code_size; bits -= code_size; // Interpret the code if ((code > available) || (code == end_of_information)) break; if (code == clear) { // Reset decoder. code_size = data_size + 1; code_mask = (1 << code_size) - 1; available = clear + 2; old_code = NullCode; continue; } if (old_code == NullCode) { pixelStack[top++] = suffix[code]; old_code = code; first = code; continue; } in_code = code; if (code == available) { pixelStack[top++] = (byte) first; code = old_code; } while (code > clear) { pixelStack[top++] = suffix[code]; code = prefix[code]; } first = ((int) suffix[code]) & 0xff; // Add a new string to the string table, if (available >= MaxStackSize) break; pixelStack[top++] = (byte) first; prefix[available] = (short) old_code; suffix[available] = (byte) first; available++; if (((available & code_mask) == 0) && (available < MaxStackSize)) { code_size++; code_mask += available; } old_code = in_code; } // Pop a pixel off the pixel stack. top--; pixels[pi++] = pixelStack[top]; i++; } for (i = pi; i < npix; i++) { pixels[i] = 0; // clear missing pixels } } /** * Returns true if an error was encountered during reading/decoding */ protected boolean err() { return status != STATUS_OK; } /** * Initializes or re-initializes reader */ protected void init() { status = STATUS_OK; frameCount = 0; frames = new ArrayList(); gct = null; lct = null; } /** * Reads a single byte from the input stream. */ protected int read() { int curByte = 0; try { curByte = in.read(); } catch (IOException e) { status = STATUS_FORMAT_ERROR; } return curByte; } /** * Reads next variable length block from input. * * @return number of bytes stored in "buffer" */ protected int readBlock() { blockSize = read(); int n = 0; if (blockSize > 0) { try { int count = 0; while (n < blockSize) { count = in.read(block, n, blockSize - n); if (count == -1) break; n += count; } } catch (IOException e) { } if (n < blockSize) { status = STATUS_FORMAT_ERROR; } } return n; } /** * Reads color table as 256 RGB integer values * * @param ncolors int number of colors to read * @return int array containing 256 colors (packed ARGB with full alpha) */ protected int[] readColorTable(int ncolors) { int nbytes = 3 * ncolors; int[] tab = null; byte[] c = new byte[nbytes]; int n = 0; try { n = in.read(c); } catch (IOException e) { } if (n < nbytes) { status = STATUS_FORMAT_ERROR; } else { tab = new int[256]; // max size to avoid bounds checks int i = 0; int j = 0; while (i < ncolors) { int r = ((int) c[j++]) & 0xff; int g = ((int) c[j++]) & 0xff; int b = ((int) c[j++]) & 0xff; tab[i++] = 0xff000000 | (r << 16) | (g << 8) | b; } } return tab; } /** * Main file parser. Reads GIF content blocks. */ protected void readContents() { // read GIF file content blocks boolean done = false; while (!(done || err())) { int code = read(); switch (code) { case 0x2C : // image separator readImage(); break; case 0x21 : // extension code = read(); switch (code) { case 0xf9 : // graphics control extension readGraphicControlExt(); break; case 0xff : // application extension readBlock(); String app = ""; for (int i = 0; i < 11; i++) { app += (char) block[i]; } if (app.equals("NETSCAPE2.0")) { readNetscapeExt(); } else skip(); // don't care break; default : // uninteresting extension skip(); } break; case 0x3b : // terminator done = true; break; case 0x00 : // bad byte, but keep going and see what happens break; default : status = STATUS_FORMAT_ERROR; } } } /** * Reads Graphics Control Extension values */ protected void readGraphicControlExt() { read(); // block size int packed = read(); // packed fields dispose = (packed & 0x1c) >> 2; // disposal method if (dispose == 0) { dispose = 1; // elect to keep old image if discretionary } transparency = (packed & 1) != 0; delay = readShort() * 10; // delay in milliseconds transIndex = read(); // transparent color index read(); // block terminator } /** * Reads GIF file header information. */ protected void readHeader() { String id = ""; for (int i = 0; i < 6; i++) { id += (char) read(); } /* * 如果id!=GIF89a佳毅判断不了暂时不用 */ if(!id.equals("GIF89a")) { status = STATUS_FORMAT_ERROR; return; } if (!id.startsWith("GIF")) { status = STATUS_FORMAT_ERROR; return; } readLSD(); if (gctFlag && !err()) {//全局定义颜色列表 gct = readColorTable(gctSize); bgColor = gct[bgIndex]; } } /** * Reads next frame image * 读每帧图片信息 */ protected void readImage() { ix = readShort(); // (sub)image position & size iy = readShort(); iw = readShort(); ih = readShort(); if(ix > width || iy > height || iw > width || ih > height)//当帧位置大小有问题佳毅不支持 {status = STATUS_FORMAT_ERROR;} int packed = read(); lctFlag = (packed & 0x80) != 0; // 1 - local color table flag局部颜色列表 interlace = (packed & 0x40) != 0; // 2 - interlace flag // 3 - sort flag // 4-5 - reserved lctSize = 2 << (packed & 7); // 6-8 - local color table size if (lctFlag) { status = STATUS_FORMAT_ERROR;//局部颜色列表 佳毅不支持 lct = readColorTable(lctSize); // read table act = lct; // make local table active } else { act = gct; // make global table active if (bgIndex == transIndex) bgColor = 0; } int save = 0; if (transparency) { save = act[transIndex]; act[transIndex] = 0; // set transparent color if specified } if (act == null) { status = STATUS_FORMAT_ERROR; // no color table defined } if (err()) return; decodeImageData(); // decode pixel data skip(); if (err()) return; frameCount++; // create new image to receive frame data image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB_PRE); setPixels(); // transfer pixel data to image frames.add(new GifFrame(image, delay)); // add image to frame list totaldelay += delay; if (transparency) { act[transIndex] = save; } resetFrame(); } /** * Reads Logical Screen Descriptor */ protected void readLSD() { // logical screen size width = readShort(); height = readShort(); // packed fields int packed = read(); gctFlag = (packed & 0x80) != 0; // 1 : global color table flag 全局定义颜色列表 true // 2-4 : color resolution // 5 : gct sort flag gctSize = 2 << (packed & 7); // 6-8 : gct size bgIndex = read(); // background color index pixelAspect = read(); // pixel aspect ratio } /** * Reads Netscape extenstion to obtain iteration count */ protected void readNetscapeExt() { do { readBlock(); if (block[0] == 1) { // loop count sub-block int b1 = ((int) block[1]) & 0xff; int b2 = ((int) block[2]) & 0xff; loopCount = (b2 << 8) | b1; } } while ((blockSize > 0) && !err()); } /** * Reads next 16-bit value, LSB first */ protected int readShort() { // read 16-bit value, LSB first return read() | (read() << 8); } /** * Resets frame state for reading next image. */ protected void resetFrame() { lastDispose = dispose; lastRect = new Rectangle(ix, iy, iw, ih); lastImage = image; lastBgColor = bgColor; int dispose = 0; boolean transparency = false; int delay = 0; lct = null; } protected void skip() { do { readBlock(); } while ((blockSize > 0) && !err()); } }
java生成GIF图片
01-09
通过图片合成gif格式图片，可这是图片质量，图片转变速度等等属性。
动态 GIF 图像库 for Java
gitblog_00019的博客
03-17 655
动态 GIF 图像库 for Java 去发现同类优质开源项目:https://gitcode.com/ 如果你在开发 Java 应用程序时需要处理动态 GIF 图像，那么这个名为 animated-gif-lib 的库可能正是你需要的。 功能与用途 animated-gif-lib 是一个 Java 库，用于读取、解码、编码和合成动态 GIF 图像。它可以用来创建动画 GIF 或者从现有图像中提...
gif用到php_PHP使用GIFEncoder类处理gif图片实例
weixin_35916466的博客
03-08 192
"Does not supported function for only one image!",'ERR01' =>"Source is not a GIF image!",'ERR02' =>"Unintelligible flag ",'ERR03' =>"Could not make animation from animated GIF source",);/*:::...
评论
添加红包

请填写红包祝福语或标题

个

红包个数最小为10个

元

红包金额最低5元

当前余额3.43元 前往充值 >
需支付：10.00元
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包

打赏作者

高慈鹃Faye

你的鼓励将是我创作的最大动力

¥1 ¥2 ¥4 ¥6 ¥10 ¥20
扫码支付：¥1
获取中
扫码支付

您的余额不足，请更换扫码支付或充值

打赏作者

实付元
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明：

1.余额是钱包充值的虚拟货币，按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载，可以购买VIP、付费专栏及课程。

余额充值