-
Notifications
You must be signed in to change notification settings - Fork 212
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Merge pull request #111 from ChillingVan/dev
Dev
- Loading branch information
Showing
7 changed files
with
168 additions
and
16 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
142 changes: 142 additions & 0 deletions
142
canvasgl/src/main/java/com/chillingvan/canvasgl/textureFilter/GaussianBlurFilter.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,142 @@ | ||
| package com.chillingvan.canvasgl.textureFilter; | ||
|
|
||
| import android.opengl.GLES20; | ||
|
|
||
| import com.chillingvan.canvasgl.ICanvasGL; | ||
| import com.chillingvan.canvasgl.OpenGLUtil; | ||
| import com.chillingvan.canvasgl.glcanvas.BasicTexture; | ||
|
|
||
| import java.util.ArrayList; | ||
|
|
||
| public class GaussianBlurFilter extends FilterGroup { | ||
| public static class GaussianFilter extends BasicTextureFilter { | ||
| private float blurSize; | ||
| private int dir; | ||
| public static final String TEXEL_WIDTH_OFFSET = "texelWidthOffset"; | ||
| public static final String TEXEL_HEIGHT_OFFSET = "texelHeightOffset"; | ||
| public static final String BLUR_COORDINATES = "blurCoordinates"; | ||
|
|
||
|
|
||
| public GaussianFilter(int dir, float blurSize) { | ||
| this.dir = dir; | ||
| this.blurSize = blurSize; | ||
|
|
||
|
|
||
| } | ||
|
|
||
| public GaussianFilter(int dir) { | ||
| this(dir, 1f); | ||
| } | ||
|
|
||
| public static final String VERTEX_SHADER = | ||
| "precision mediump float;\n" + | ||
| "uniform mat4 " + MATRIX_UNIFORM + ";\n" + | ||
| "uniform mat4 " + TEXTURE_MATRIX_UNIFORM + ";\n" + | ||
| "attribute vec2 " + POSITION_ATTRIBUTE + ";\n" + | ||
| "const int GAUSSIAN_SAMPLES = 9;\n" + | ||
| "\n" + | ||
| "uniform float " + TEXEL_WIDTH_OFFSET + ";\n" + | ||
| "uniform float " + TEXEL_HEIGHT_OFFSET + ";\n" + | ||
| "\n" + | ||
| "varying vec2 " + VARYING_TEXTURE_COORD + ";\n" + | ||
| "varying vec2 " + BLUR_COORDINATES + "[GAUSSIAN_SAMPLES];\n" + | ||
| "\n" + | ||
| "void main()\n" + | ||
| "{\n" + | ||
| " vec4 pos = vec4(" + POSITION_ATTRIBUTE + ", 0.0, 1.0);\n" + | ||
| " gl_Position = " + MATRIX_UNIFORM + "* pos;\n" + | ||
| VARYING_TEXTURE_COORD + " = (" + TEXTURE_MATRIX_UNIFORM + " * pos).xy;\n" + | ||
| " \n" + | ||
| " int multiplier = 0;\n" + | ||
| " vec2 blurStep;\n" + | ||
| " vec2 singleStepOffset = vec2(" + TEXEL_HEIGHT_OFFSET + ", " + TEXEL_WIDTH_OFFSET + ");\n" + | ||
| " \n" + | ||
| " for (int i = 0; i < GAUSSIAN_SAMPLES; i++)\n" + | ||
| " {\n" + | ||
| " multiplier = (i - ((GAUSSIAN_SAMPLES - 1) / 2));\n" + | ||
| " // Blur in x (horizontal)\n" + | ||
| " blurStep = float(multiplier) * singleStepOffset;\n" + | ||
| " " + BLUR_COORDINATES + "[i] = " + VARYING_TEXTURE_COORD + ".xy + blurStep;\n" + | ||
| " }\n" + | ||
| "}\n"; | ||
|
|
||
| public static final String FRAGMENT_SHADER = | ||
| "uniform sampler2D " + TEXTURE_SAMPLER_UNIFORM + ";\n" + | ||
| "\n" + | ||
| "const lowp int GAUSSIAN_SAMPLES = 9;\n" + | ||
| "\n" + | ||
| "varying highp vec2 " + VARYING_TEXTURE_COORD + ";\n" + | ||
| "varying highp vec2 " + BLUR_COORDINATES + "[GAUSSIAN_SAMPLES];\n" + | ||
| "\n" + | ||
| "void main()\n" + | ||
| "{\n" + | ||
| " lowp vec3 sum = vec3(0.0);\n" + | ||
| " lowp vec4 fragColor=texture2D(" + TEXTURE_SAMPLER_UNIFORM + "," + VARYING_TEXTURE_COORD + ");\n" + | ||
| " \n" + | ||
| " sum += texture2D(" + TEXTURE_SAMPLER_UNIFORM + ", " + BLUR_COORDINATES + "[0]).rgb * 0.05;\n" + | ||
| " sum += texture2D(" + TEXTURE_SAMPLER_UNIFORM + ", " + BLUR_COORDINATES + "[1]).rgb * 0.09;\n" + | ||
| " sum += texture2D(" + TEXTURE_SAMPLER_UNIFORM + ", " + BLUR_COORDINATES + "[2]).rgb * 0.12;\n" + | ||
| " sum += texture2D(" + TEXTURE_SAMPLER_UNIFORM + ", " + BLUR_COORDINATES + "[3]).rgb * 0.15;\n" + | ||
| " sum += texture2D(" + TEXTURE_SAMPLER_UNIFORM + ", " + BLUR_COORDINATES + "[4]).rgb * 0.18;\n" + | ||
| " sum += texture2D(" + TEXTURE_SAMPLER_UNIFORM + ", " + BLUR_COORDINATES + "[5]).rgb * 0.15;\n" + | ||
| " sum += texture2D(" + TEXTURE_SAMPLER_UNIFORM + ", " + BLUR_COORDINATES + "[6]).rgb * 0.12;\n" + | ||
| " sum += texture2D(" + TEXTURE_SAMPLER_UNIFORM + ", " + BLUR_COORDINATES + "[7]).rgb * 0.09;\n" + | ||
| " sum += texture2D(" + TEXTURE_SAMPLER_UNIFORM + ", " + BLUR_COORDINATES + "[8]).rgb * 0.05;\n" + | ||
| "\n" + | ||
| " gl_FragColor = vec4(sum,fragColor.a);\n" + | ||
| "}"; | ||
|
|
||
|
|
||
| @Override | ||
| public String getVertexShader() { | ||
| return VERTEX_SHADER; | ||
| } | ||
|
|
||
| @Override | ||
| public String getFragmentShader() { | ||
| return FRAGMENT_SHADER; | ||
| } | ||
|
|
||
|
|
||
| @Override | ||
| public void onPreDraw(int program, BasicTexture texture, ICanvasGL canvas) { | ||
| super.onPreDraw(program, texture, canvas); | ||
| int widthOffsetLocation = GLES20.glGetUniformLocation(program, TEXEL_WIDTH_OFFSET); | ||
| int heightOffsetLocation = GLES20.glGetUniformLocation(program, TEXEL_HEIGHT_OFFSET); | ||
| if (dir == 0) { | ||
| OpenGLUtil.setFloat(widthOffsetLocation, blurSize / texture.getWidth()); | ||
| OpenGLUtil.setFloat(heightOffsetLocation, 0); | ||
|
|
||
| } else { | ||
| OpenGLUtil.setFloat(widthOffsetLocation, 0); | ||
| OpenGLUtil.setFloat(heightOffsetLocation, blurSize / texture.getHeight()); | ||
| } | ||
|
|
||
|
|
||
| } | ||
|
|
||
| public void setBlurSize(float blurSize) { | ||
| this.blurSize = blurSize; | ||
| } | ||
|
|
||
|
|
||
| } | ||
|
|
||
|
|
||
| public GaussianBlurFilter(float blurSize) { | ||
| super(new ArrayList<TextureFilter>()); | ||
| mFilters.add(new GaussianFilter(0, blurSize)); | ||
| mFilters.add(new GaussianFilter(1, blurSize)); | ||
| updateMergedFilters(); | ||
| } | ||
|
|
||
| public void setBlurSize(float blurSize) { | ||
| for (TextureFilter textureFilter : mFilters) { | ||
| if (textureFilter instanceof GaussianFilter) { | ||
| GaussianFilter gaussianFilter = (GaussianFilter) textureFilter; | ||
| gaussianFilter.setBlurSize(blurSize); | ||
| } | ||
|
|
||
| } | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters