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殷飞ChillingVan
殷飞
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ChillingVan
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增加高斯模糊滤波器; Add GaussianBlurFilter
# Conflicts: # canvasglsample/src/main/java/com/chillingvan/canvasglsample/filter/FilterActivity.java
1 parent adc0918 commit 8b5c297

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-6
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2 files changed

+155
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lines changed

‎canvasgl/src/main/java/com/chillingvan/canvasgl/textureFilter/GaussianBlurFilter.java‎

Lines changed: 142 additions & 0 deletions
Original file line numberDiff line numberDiff line change
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package com.chillingvan.canvasgl.textureFilter;
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import android.opengl.GLES20;
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import com.chillingvan.canvasgl.ICanvasGL;
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import com.chillingvan.canvasgl.OpenGLUtil;
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import com.chillingvan.canvasgl.glcanvas.BasicTexture;
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import java.util.ArrayList;
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public class GaussianBlurFilter extends FilterGroup {
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public static class GaussianFilter extends BasicTextureFilter {
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private float blurSize;
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private int dir;
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public static final String TEXEL_WIDTH_OFFSET = "texelWidthOffset";
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public static final String TEXEL_HEIGHT_OFFSET = "texelHeightOffset";
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public static final String BLUR_COORDINATES = "blurCoordinates";
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public GaussianFilter(int dir, float blurSize) {
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this.dir = dir;
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this.blurSize = blurSize;
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}
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public GaussianFilter(int dir) {
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this(dir, 1f);
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}
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public static final String VERTEX_SHADER =
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"precision mediump float;\n" +
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"uniform mat4 " + MATRIX_UNIFORM + ";\n" +
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"uniform mat4 " + TEXTURE_MATRIX_UNIFORM + ";\n" +
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"attribute vec2 " + POSITION_ATTRIBUTE + ";\n" +
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"const int GAUSSIAN_SAMPLES = 9;\n" +
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"\n" +
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"uniform float " + TEXEL_WIDTH_OFFSET + ";\n" +
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"uniform float " + TEXEL_HEIGHT_OFFSET + ";\n" +
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"\n" +
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"varying vec2 " + VARYING_TEXTURE_COORD + ";\n" +
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"varying vec2 " + BLUR_COORDINATES + "[GAUSSIAN_SAMPLES];\n" +
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"\n" +
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"void main()\n" +
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"{\n" +
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" vec4 pos = vec4(" + POSITION_ATTRIBUTE + ", 0.0, 1.0);\n" +
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" gl_Position = " + MATRIX_UNIFORM + "* pos;\n" +
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VARYING_TEXTURE_COORD + " = (" + TEXTURE_MATRIX_UNIFORM + " * pos).xy;\n" +
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" \n" +
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" int multiplier = 0;\n" +
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" vec2 blurStep;\n" +
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" vec2 singleStepOffset = vec2(" + TEXEL_HEIGHT_OFFSET + ", " + TEXEL_WIDTH_OFFSET + ");\n" +
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" \n" +
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" for (int i = 0; i < GAUSSIAN_SAMPLES; i++)\n" +
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" {\n" +
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" multiplier = (i - ((GAUSSIAN_SAMPLES - 1) / 2));\n" +
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" // Blur in x (horizontal)\n" +
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" blurStep = float(multiplier) * singleStepOffset;\n" +
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" " + BLUR_COORDINATES + "[i] = " + VARYING_TEXTURE_COORD + ".xy + blurStep;\n" +
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" }\n" +
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"}\n";
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public static final String FRAGMENT_SHADER =
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"uniform sampler2D " + TEXTURE_SAMPLER_UNIFORM + ";\n" +
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"\n" +
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"const lowp int GAUSSIAN_SAMPLES = 9;\n" +
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"\n" +
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"varying highp vec2 " + VARYING_TEXTURE_COORD + ";\n" +
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"varying highp vec2 " + BLUR_COORDINATES + "[GAUSSIAN_SAMPLES];\n" +
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"\n" +
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"void main()\n" +
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"{\n" +
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" lowp vec3 sum = vec3(0.0);\n" +
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" lowp vec4 fragColor=texture2D(" + TEXTURE_SAMPLER_UNIFORM + "," + VARYING_TEXTURE_COORD + ");\n" +
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" \n" +
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" sum += texture2D(" + TEXTURE_SAMPLER_UNIFORM + ", " + BLUR_COORDINATES + "[0]).rgb * 0.05;\n" +
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" sum += texture2D(" + TEXTURE_SAMPLER_UNIFORM + ", " + BLUR_COORDINATES + "[1]).rgb * 0.09;\n" +
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" sum += texture2D(" + TEXTURE_SAMPLER_UNIFORM + ", " + BLUR_COORDINATES + "[2]).rgb * 0.12;\n" +
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" sum += texture2D(" + TEXTURE_SAMPLER_UNIFORM + ", " + BLUR_COORDINATES + "[3]).rgb * 0.15;\n" +
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" sum += texture2D(" + TEXTURE_SAMPLER_UNIFORM + ", " + BLUR_COORDINATES + "[4]).rgb * 0.18;\n" +
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" sum += texture2D(" + TEXTURE_SAMPLER_UNIFORM + ", " + BLUR_COORDINATES + "[5]).rgb * 0.15;\n" +
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" sum += texture2D(" + TEXTURE_SAMPLER_UNIFORM + ", " + BLUR_COORDINATES + "[6]).rgb * 0.12;\n" +
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" sum += texture2D(" + TEXTURE_SAMPLER_UNIFORM + ", " + BLUR_COORDINATES + "[7]).rgb * 0.09;\n" +
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" sum += texture2D(" + TEXTURE_SAMPLER_UNIFORM + ", " + BLUR_COORDINATES + "[8]).rgb * 0.05;\n" +
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"\n" +
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" gl_FragColor = vec4(sum,fragColor.a);\n" +
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"}";
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@Override
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public String getVertexShader() {
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return VERTEX_SHADER;
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}
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@Override
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public String getFragmentShader() {
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return FRAGMENT_SHADER;
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}
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@Override
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public void onPreDraw(int program, BasicTexture texture, ICanvasGL canvas) {
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super.onPreDraw(program, texture, canvas);
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int widthOffsetLocation = GLES20.glGetUniformLocation(program, TEXEL_WIDTH_OFFSET);
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int heightOffsetLocation = GLES20.glGetUniformLocation(program, TEXEL_HEIGHT_OFFSET);
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if (dir == 0) {
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OpenGLUtil.setFloat(widthOffsetLocation, blurSize / texture.getWidth());
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OpenGLUtil.setFloat(heightOffsetLocation, 0);
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} else {
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OpenGLUtil.setFloat(widthOffsetLocation, 0);
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OpenGLUtil.setFloat(heightOffsetLocation, blurSize / texture.getHeight());
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}
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}
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public void setBlurSize(float blurSize) {
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this.blurSize = blurSize;
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}
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}
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public GaussianBlurFilter(float blurSize) {
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super(new ArrayList<TextureFilter>());
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mFilters.add(new GaussianFilter(0, blurSize));
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mFilters.add(new GaussianFilter(1, blurSize));
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updateMergedFilters();
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}
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public void setBlurSize(float blurSize) {
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for (TextureFilter textureFilter : mFilters) {
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if (textureFilter instanceof GaussianFilter) {
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GaussianFilter gaussianFilter = (GaussianFilter) textureFilter;
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gaussianFilter.setBlurSize(blurSize);
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}
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}
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}
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}

‎canvasglsample/src/main/java/com/chillingvan/canvasglsample/filter/FilterActivity.java‎

Lines changed: 13 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -36,6 +36,7 @@
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import com.chillingvan.canvasgl.textureFilter.DirectionalSobelEdgeDetectionFilter;
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import com.chillingvan.canvasgl.textureFilter.FilterGroup;
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import com.chillingvan.canvasgl.textureFilter.GammaFilter;
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import com.chillingvan.canvasgl.textureFilter.GaussianBlurFilter;
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import com.chillingvan.canvasgl.textureFilter.HueFilter;
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import com.chillingvan.canvasgl.textureFilter.LightenBlendFilter;
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import com.chillingvan.canvasgl.textureFilter.LookupFilter;
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import jp.co.cyberagent.android.gpuimage.filter.GPUImageFilter;
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import jp.co.cyberagent.android.gpuimage.filter.GPUImageFilterGroup;
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import jp.co.cyberagent.android.gpuimage.filter.GPUImageGammaFilter;
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import jp.co.cyberagent.android.gpuimage.filter.GPUImageGaussianBlurFilter;
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import jp.co.cyberagent.android.gpuimage.filter.GPUImageHueFilter;
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import jp.co.cyberagent.android.gpuimage.filter.GPUImageLightenBlendFilter;
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import jp.co.cyberagent.android.gpuimage.filter.GPUImageLookupFilter;
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initSeekBar();
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adapter = new CommonBaseAdapter<>(renderEntityList);
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listView.setAdapter(adapter);
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refreshDataList();
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}
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@Override
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public void onStartTrackingTouch(SeekBar seekBar) { }
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public void onStartTrackingTouch(SeekBar seekBar) {
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}
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@Override
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public void onStopTrackingTouch(SeekBar seekBar) { }
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public void onStopTrackingTouch(SeekBar seekBar) {
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}
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});
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}
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@@ -162,7 +165,7 @@ private List<CaseEntity> createRenderEntities() {
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int width = firstBitmap.getWidth();
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int height = firstBitmap.getHeight();
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CropFilter cropFilter = new CropFilter(CropFilter.calc(width/2, width), 0, 1, CropFilter.calc(height/2, height));
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CropFilter cropFilter = new CropFilter(CropFilter.calc(width / 2, width), 0, 1, CropFilter.calc(height / 2, height));
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renderEntityList.add(new CaseEntity(cropFilter, new GPUImageFilter(), firstBitmap));
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Bitmap lookupAmatorka = BitmapFactory.decodeResource(getResources(), R.drawable.lookup_amatorka);
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GPUImageColorMatrixFilter gpuImageColorMatrixFilter = new GPUImageColorMatrixFilter(0.3f, matrix4);
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renderEntityList.add(new CaseEntity(colorMatrixFilter, gpuImageColorMatrixFilter, firstBitmap));
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GaussianBlurFilter gaussianBlurFilter = new GaussianBlurFilter(5f);
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GPUImageGaussianBlurFilter gpuImageGaussianBlurFilter = new GPUImageGaussianBlurFilter(5f);
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renderEntityList.add(new CaseEntity(gaussianBlurFilter, gpuImageGaussianBlurFilter, firstBitmap));
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return renderEntityList;
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}
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}
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public static class Range {
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float min ;
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float min;
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float max;
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public Range(float min, float max) {
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}
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public float value(float percentage) {
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return min + (max - min) * (percentage /100);
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return min + (max - min) * (percentage / 100);
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}
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}
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}

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