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151 changes: 151 additions & 0 deletions
151
Acrimony/handler/client/BlurFilters/GaussianFilter.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,151 @@ | ||
| /* | ||
| * Decompiled with CFR 0.153-SNAPSHOT (d6f6758-dirty). | ||
| */ | ||
| package Acrimony.handler.client.BlurFilters; | ||
|
|
||
| import Acrimony.handler.client.BlurFilters.PixelUtils; | ||
| import java.awt.image.BufferedImage; | ||
| import java.awt.image.ColorModel; | ||
| import java.awt.image.Kernel; | ||
|
|
||
| public class GaussianFilter { | ||
| protected float radius; | ||
| protected Kernel kernel; | ||
| protected boolean alpha = true; | ||
| protected boolean premultiplyAlpha = true; | ||
| public static int CLAMP_EDGES = 1; | ||
| public static int WRAP_EDGES = 2; | ||
|
|
||
| public GaussianFilter() { | ||
| this(2.0f); | ||
| } | ||
|
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| public GaussianFilter(float radius) { | ||
| this.setRadius(radius); | ||
| } | ||
|
|
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| public void setRadius(float radius) { | ||
| this.radius = radius; | ||
| this.kernel = GaussianFilter.makeKernel(radius); | ||
| } | ||
|
|
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| public float getRadius() { | ||
| return this.radius; | ||
| } | ||
|
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| public BufferedImage filter(BufferedImage src, BufferedImage dst) { | ||
| int width = src.getWidth(); | ||
| int height = src.getHeight(); | ||
| if (dst == null) { | ||
| dst = this.createCompatibleDestImage(src, null); | ||
| } | ||
| int[] inPixels = new int[width * height]; | ||
| int[] outPixels = new int[width * height]; | ||
| src.getRGB(0, 0, width, height, inPixels, 0, width); | ||
| if (this.radius > 0.0f) { | ||
| GaussianFilter.convolveAndTranspose(this.kernel, inPixels, outPixels, width, height, this.alpha, this.alpha && this.premultiplyAlpha, false, CLAMP_EDGES); | ||
| GaussianFilter.convolveAndTranspose(this.kernel, outPixels, inPixels, height, width, this.alpha, false, this.alpha && this.premultiplyAlpha, CLAMP_EDGES); | ||
| } | ||
| dst.setRGB(0, 0, width, height, inPixels, 0, width); | ||
| return dst; | ||
| } | ||
|
|
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| public static void convolveAndTranspose(Kernel kernel, int[] inPixels, int[] outPixels, int width, int height, boolean alpha, boolean premultiply, boolean unpremultiply, int edgeAction) { | ||
| float[] matrix = kernel.getKernelData(null); | ||
| int cols = kernel.getWidth(); | ||
| int cols2 = cols / 2; | ||
| for (int y = 0; y < height; ++y) { | ||
| int index = y; | ||
| int ioffset = y * width; | ||
| for (int x = 0; x < width; ++x) { | ||
| float r = 0.0f; | ||
| float g = 0.0f; | ||
| float b = 0.0f; | ||
| float a = 0.0f; | ||
| int moffset = cols2; | ||
| for (int col = -cols2; col <= cols2; ++col) { | ||
| float f = matrix[moffset + col]; | ||
| if (f == 0.0f) continue; | ||
| int ix = x + col; | ||
| if (ix < 0) { | ||
| if (edgeAction == CLAMP_EDGES) { | ||
| ix = 0; | ||
| } else if (edgeAction == WRAP_EDGES) { | ||
| ix = (x + width) % width; | ||
| } | ||
| } else if (ix >= width) { | ||
| if (edgeAction == CLAMP_EDGES) { | ||
| ix = width - 1; | ||
| } else if (edgeAction == WRAP_EDGES) { | ||
| ix = (x + width) % width; | ||
| } | ||
| } | ||
| int rgb = inPixels[ioffset + ix]; | ||
| int pa = rgb >> 24 & 0xFF; | ||
| int pr = rgb >> 16 & 0xFF; | ||
| int pg = rgb >> 8 & 0xFF; | ||
| int pb = rgb & 0xFF; | ||
| if (premultiply) { | ||
| float a255 = (float)pa * 0.003921569f; | ||
| pr = (int)((float)pr * a255); | ||
| pg = (int)((float)pg * a255); | ||
| pb = (int)((float)pb * a255); | ||
| } | ||
| a += f * (float)pa; | ||
| r += f * (float)pr; | ||
| g += f * (float)pg; | ||
| b += f * (float)pb; | ||
| } | ||
| if (unpremultiply && a != 0.0f && a != 255.0f) { | ||
| float f = 255.0f / a; | ||
| r *= f; | ||
| g *= f; | ||
| b *= f; | ||
| } | ||
| int ia = alpha ? PixelUtils.clamp((int)((double)a + 0.5)) : 255; | ||
| int ir = PixelUtils.clamp((int)((double)r + 0.5)); | ||
| int ig = PixelUtils.clamp((int)((double)g + 0.5)); | ||
| int ib = PixelUtils.clamp((int)((double)b + 0.5)); | ||
| outPixels[index] = ia << 24 | ir << 16 | ig << 8 | ib; | ||
| index += height; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| public static Kernel makeKernel(float radius) { | ||
| int r = (int)Math.ceil(radius); | ||
| int rows = r * 2 + 1; | ||
| float[] matrix = new float[rows]; | ||
| float sigma = radius / 3.0f; | ||
| float sigma22 = 2.0f * sigma * sigma; | ||
| float sigmaPi2 = (float)Math.PI * 2 * sigma; | ||
| float sqrtSigmaPi2 = (float)Math.sqrt(sigmaPi2); | ||
| float radius2 = radius * radius; | ||
| float total = 0.0f; | ||
| int index = 0; | ||
| for (int row = -r; row <= r; ++row) { | ||
| float distance = row * row; | ||
| matrix[index] = distance > radius2 ? 0.0f : (float)Math.exp(-distance / sigma22) / sqrtSigmaPi2; | ||
| total += matrix[index]; | ||
| ++index; | ||
| } | ||
| int i = 0; | ||
| while (i < rows) { | ||
| int n = i++; | ||
| matrix[n] = matrix[n] / total; | ||
| } | ||
| return new Kernel(rows, 1, matrix); | ||
| } | ||
|
|
||
| public BufferedImage createCompatibleDestImage(BufferedImage src, ColorModel dstCM) { | ||
| if (dstCM == null) { | ||
| dstCM = src.getColorModel(); | ||
| } | ||
| return new BufferedImage(dstCM, dstCM.createCompatibleWritableRaster(src.getWidth(), src.getHeight()), dstCM.isAlphaPremultiplied(), null); | ||
| } | ||
|
|
||
| public String toString() { | ||
| return "Blur/Gaussian Blur..."; | ||
| } | ||
| } | ||
|
|
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