diff options
Diffstat (limited to 'java/awt/image/ReplicateScaleFilter.java')
| -rw-r--r-- | java/awt/image/ReplicateScaleFilter.java | 144 |
1 files changed, 77 insertions, 67 deletions
diff --git a/java/awt/image/ReplicateScaleFilter.java b/java/awt/image/ReplicateScaleFilter.java index 933527b43..5ba03f182 100644 --- a/java/awt/image/ReplicateScaleFilter.java +++ b/java/awt/image/ReplicateScaleFilter.java @@ -46,6 +46,7 @@ import java.util.Hashtable; * exact method is not defined by Sun but some sort of fast Box filter should * probably be correct. * <br> + * Currently this filter does nothing and needs to be implemented. * * @author C. Brian Jones (cbj@gnu.org) */ @@ -116,11 +117,11 @@ public class ReplicateScaleFilter extends ImageFilter } else if (destWidth < 0) { - destWidth = (int) (width * ((double) destHeight / srcHeight)); + destWidth = width * destHeight / srcHeight; } else if (destHeight < 0) { - destHeight = (int) (height * ((double) destWidth / srcWidth)); + destHeight = height * destWidth / srcWidth; } if (consumer != null) @@ -158,19 +159,35 @@ public class ReplicateScaleFilter extends ImageFilter public void setPixels(int x, int y, int w, int h, ColorModel model, byte[] pixels, int offset, int scansize) { - double rx = ((double) srcWidth) / destWidth; - double ry = ((double) srcHeight) / destHeight; - - int destScansize = (int) Math.round(scansize / rx); - - byte[] destPixels = replicatePixels(x, y, w, h, - model, pixels, offset, scansize, - rx, ry, destScansize); - - if (consumer != null) - consumer.setPixels((int) Math.floor(x/rx), (int) Math.floor(y/ry), - (int) Math.ceil(w/rx), (int) Math.ceil(h/ry), - model, destPixels, 0, destScansize); + if (srcrows == null || srccols == null) + setupSources(); + int dx1 = (2 * x * destWidth + srcWidth - 1) / (2 * destWidth); + int dy1 = (2 * y * destHeight + srcHeight - 1) / (2 * destHeight); + byte[] pix; + if (outpixbuf != null && outpixbuf instanceof byte[]) + { + pix = (byte[]) outpixbuf; + } + else + { + pix = new byte[destWidth]; + outpixbuf = pix; + } + int sy, sx; + for (int yy = dy1; (sy = srcrows[yy]) < y + h; yy++) + { + int offs = offset + scansize * (sy - y); + int xx; + for (xx = dx1; (sx = srccols[xx]) < x + w; xx++) + { + pix[xx] = pixels[offs + sx - x]; + } + if (xx > dx1) + { + consumer.setPixels(dx1, yy, xx - dx1, 1, model, pix, dx1, + destWidth); + } + } } /** @@ -190,59 +207,52 @@ public class ReplicateScaleFilter extends ImageFilter public void setPixels(int x, int y, int w, int h, ColorModel model, int[] pixels, int offset, int scansize) { - double rx = ((double) srcWidth) / destWidth; - double ry = ((double) srcHeight) / destHeight; - - int destScansize = (int) Math.round(scansize / rx); - - int[] destPixels = replicatePixels(x, y, w, h, - model, pixels, offset, scansize, - rx, ry, destScansize); - - if (consumer != null) - consumer.setPixels((int) Math.floor(x/rx), (int) Math.floor(y/ry), - (int) Math.ceil(w/rx), (int) Math.ceil(h/ry), - model, destPixels, 0, destScansize); - } - - private byte[] replicatePixels(int srcx, int srcy, int srcw, int srch, - ColorModel model, byte[] srcPixels, - int srcOffset, int srcScansize, - double rx, double ry, int destScansize) - { - byte[] destPixels = - new byte[(int) Math.ceil(srcw/rx) * (int) Math.ceil(srch/ry)]; - - int a, b; - for (int i = 0; i < destPixels.length; i++) - { - a = (int) ((int) ( ((double) i) / destScansize) * ry) * srcScansize; - b = (int) ((i % destScansize) * rx); - if ((a + b + srcOffset) < srcPixels.length) - destPixels[i] = srcPixels[a + b + srcOffset]; - } - - return destPixels; + if (srcrows == null || srccols == null) + setupSources(); + int dx1 = (2 * x * destWidth + srcWidth - 1) / (2 * destWidth); + int dy1 = (2 * y * destHeight + srcHeight - 1) / (2 * destHeight); + int[] pix; + if (outpixbuf != null && outpixbuf instanceof int[]) + { + pix = (int[]) outpixbuf; + } + else + { + pix = new int[destWidth]; + outpixbuf = pix; + } + int sy, sx; + for (int yy = dy1; (sy = srcrows[yy]) < y + h; yy++) + { + int offs = offset + scansize * (sy - y); + int xx; + for (xx = dx1; (sx = srccols[xx]) < x + w; xx++) + { + pix[xx] = pixels[offs + sx - x]; + } + if (xx > dx1) + { + consumer.setPixels(dx1, yy, xx - dx1, 1, model, pix, dx1, + destWidth); + } + } } - private int[] replicatePixels(int srcx, int srcy, int srcw, int srch, - ColorModel model, int[] srcPixels, - int srcOffset, int srcScansize, - double rx, double ry, int destScansize) - { - int[] destPixels = - new int[(int) Math.ceil(srcw/rx) * (int) Math.ceil(srch/ry)]; - - int a, b; - for (int i = 0; i < destPixels.length; i++) - { - a = (int) ((int) ( ((double) i) / destScansize) * ry) * srcScansize; - b = (int) ((i % destScansize) * rx); - if ((a + b + srcOffset) < srcPixels.length) - destPixels[i] = srcPixels[a + b + srcOffset]; - } - - return destPixels; - } + /** + * Sets up the srcrows and srccols arrays. + */ + private void setupSources() + { + srcrows = new int[destHeight + 1]; + for (int y = 0; y <= destHeight; y++) + { + srcrows[y] = (2 * y * srcHeight + srcHeight) / (2 * destHeight); + } + srccols = new int[destWidth + 1]; + for (int x = 0; x <= destWidth; x++) + { + srccols[x] = (2 * x * srcWidth + srcWidth) / (2 * destWidth); + } + } } |