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nekocode
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Aug 12, 2016
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100 changes: 100 additions & 0 deletions
100
app/src/main/java/cn/nekocode/camerafilter/RenderBuffer.java
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| @@ -0,0 +1,100 @@ | ||
| /* | ||
| * Copyright 2016 nekocode | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package cn.nekocode.camerafilter; | ||
|
|
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| import android.opengl.GLES20; | ||
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| import java.nio.ByteBuffer; | ||
| import java.nio.ByteOrder; | ||
| import java.nio.IntBuffer; | ||
|
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| import javax.microedition.khronos.opengles.GL10; | ||
|
|
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| /** | ||
| * Created by nekocode on 16/8/12. | ||
| */ | ||
| public class RenderBuffer { | ||
| private int texId = 0; | ||
| private int activeTexUnit = 0; | ||
| private int renderBufferId = 0; | ||
| private int frameBufferId = 0; | ||
|
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| private int width, height; | ||
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| public RenderBuffer(int width, int height, int activeTexUnit) { | ||
| this.width = width; | ||
| this.height = height; | ||
| this.activeTexUnit = activeTexUnit; | ||
| int[] genbuf = new int[1]; | ||
|
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| // Generate and bind 2d texture | ||
| GLES20.glActiveTexture(activeTexUnit); | ||
| texId = MyGLUtils.genTexture(); | ||
| IntBuffer texBuffer = | ||
| ByteBuffer.allocateDirect(width * height * 4).order(ByteOrder.nativeOrder()).asIntBuffer(); | ||
| GLES20.glTexImage2D(GLES20.GL_TEXTURE_2D, 0, GLES20.GL_RGBA, width, height, 0, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, texBuffer); | ||
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| GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_LINEAR); | ||
| GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR); | ||
| GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S, GL10.GL_CLAMP_TO_EDGE); | ||
| GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T, GL10.GL_CLAMP_TO_EDGE); | ||
|
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| // Generate frame buffer | ||
| GLES20.glGenFramebuffers(1, genbuf, 0); | ||
| frameBufferId = genbuf[0]; | ||
| // Bind frame buffer | ||
| GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, frameBufferId); | ||
|
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| // Generate render buffer | ||
| GLES20.glGenRenderbuffers(1, genbuf, 0); | ||
| renderBufferId = genbuf[0]; | ||
| // Bind render buffer | ||
| GLES20.glBindRenderbuffer(GLES20.GL_RENDERBUFFER, renderBufferId); | ||
| GLES20.glRenderbufferStorage(GLES20.GL_RENDERBUFFER, GLES20.GL_DEPTH_COMPONENT16, width, height); | ||
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| unbind(); | ||
| } | ||
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| public int getTexId() { | ||
| return texId; | ||
| } | ||
|
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| public int getWidth() { | ||
| return width; | ||
| } | ||
|
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| public int getHeight() { | ||
| return height; | ||
| } | ||
|
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| public int getActiveTexUnit() { | ||
| return activeTexUnit; | ||
| } | ||
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| public void bind() { | ||
| GLES20.glViewport(0, 0, width, height); | ||
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| GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, frameBufferId); | ||
| GLES20.glFramebufferTexture2D(GLES20.GL_FRAMEBUFFER, GLES20.GL_COLOR_ATTACHMENT0, | ||
| GLES20.GL_TEXTURE_2D, texId, 0); | ||
| GLES20.glFramebufferRenderbuffer(GLES20.GL_FRAMEBUFFER, GLES20.GL_DEPTH_ATTACHMENT, | ||
| GLES20.GL_RENDERBUFFER, renderBufferId); | ||
| } | ||
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| public void unbind() { | ||
| GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, 0); | ||
| } | ||
| } |
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