J2ME嶄議GIF侃尖窃 - 園殻秘壇利
作者 佚名技术
来源 NET编程
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发布时间 2012-06-17
| 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++; } } } image = Image.createRGBImage(dest, width, height, false); } /** * Gets the image contents of frame n. * * @return BufferedImage representation of frame, or null if n is invalid. */ public Image getFrame(int n) { Image im = null; if ((n >= 0) && (n < frameCount)) { im = ((GifFrame) frames.elementAt(n)).image; } return im; } /** * Reads GIF image from stream * * @param BufferedInputStream * containing GIF file. * @return read status code (0 = no errors) */ public int read(InputStream 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 (Exception e) { e.printStackTrace(); } 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 (pixelSta |
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