Android OpenGLES + Camera1 相机预览(2)-Toy模板网

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private void checkRenderThreadState() {
if (mGLThread != null) {
throw new IllegalStateException(
“setRenderer has already been called for this instance.”);
}
}

也就是说，设置了Renderer后，就不能更换了，那么如果有需求：本来是渲染一个灰度滤镜的，当想变换其他滤镜的时候，又不能重新设置Renderer，此时应该如何

其实可以这样，Renderer可以只做一个调度者，Renderer里面可以写很多的滤镜，也可以变换滤镜，那么就可以满足我们的需求

那么接下来就先来定义一个基础滤镜

首先第一步，创建一个IRender

public interface IRender {
/**

创建
*/
void onCreate();

/**

设置尺寸
*/
void onChange(int width, int height);

/**

绘制
*/
void onDraw(int textureId);

/**

释放资源
*/
void onRelease();
}

和Renderer有些许不同，修改和增加了一些方法

新建BaseRender，实现IRender接口

public class BaseRender implements IRender {
/**

Context
*/
private Context context;

/**

渲染数据
*/
private BaseRenderBean renderBean;

/**

顶点坐标
*/
private FloatBuffer vertexBuffer;

/**

纹理坐标
*/
private FloatBuffer coordinateBuffer;

/**

顶点坐标维数（即x, y, z）
*/
private int vertexSize = 2;

/**

纹理坐标维数（即x, y, z）
*/
private int coordinateSize = 2;

/**

顶点坐标步长（即维数 * 字节数）
*/
private int vertexStride = vertexSize * 4;

/**

纹理坐标步长（即维数 * 字节数）
*/
private int coordinateStride = coordinateSize * 4;

/**

顶点个数
*/
private int vertexCount = 4;

/**

纹理点个数
*/
private int coordinateCount = 4;

/**

vertex shader
*/
private int vertexShader;

/**

frag shader
*/
private int fragShader;

/**

program
*/
private int program;

/**

纹理 id
*/
private int textureId;

/**

fbo纹理id
*/
private int fboTextureId;

/**

fbo id
*/
private int fboId;

/**

vbo id
*/
private int vboId;

/**

顶点着色器代码路径
*/
private String vertexFilename;

/**

片元着色器代码路径
*/
private String fragFilename;

/**

尺寸
*/
private int width;
private int height;

/**

是否绑定Fbo
*/
private boolean isBindFbo = false;

/**

着色器顶点坐标位置
*/
private int aPosLocation;

/**

着色器纹理坐标位置
*/
private int aCoordinateLocation;

/**

着色器纹理位置
*/
private int uSamplerLocation;

/**

是否执行了onCreate
*/
private boolean isCreate = false;

/**

是否执行了onChange
*/
private boolean isChange = false;

public BaseRender(Context context) {
this(context, “render/base/base/vertex.frag”, “render/base/base/frag.frag”);
}

public BaseRender(Context context, String vertexFilename, String fragFilename) {
this.context = context;
this.vertexFilename = vertexFilename;
this.fragFilename = fragFilename;
}

@Override
public void onCreate() {
if (isCreate) {
return;
}
onCreatePre();
onClearColor();
onInitBlend();
onInitVertexBuffer();
onInitCoordinateBuffer();
onInitVbo();
onInitProgram();
onCreateAfter();
isCreate = true;
}

@Override
public void onChange(int width, int height) {
if (isChange) {
return;
}
onChangePre();
setWidth(width);
setHeight(height);
onViewport();
onInitFbo();
onChangeAfter();
isChange = true;
}

@Override
public void onDraw(int textureId) {
if (!onReadyToDraw()) {
return;
}
onDrawPre();
onClear();
onUseProgram();
onInitLocation();
onBindFbo();
onBindVbo();
onActiveTexture(textureId);
onEnableVertexAttributeArray();
onSetVertexData();
onSetCoordinateData();
onSetOtherData();
onDraw();
onDisableVertexAttributeArray();
onUnBind();
onDrawAfter();
}

@Override
public void onRelease() {
onDeleteProgram(program);
onDeleteShader(vertexShader);
onDeleteShader(fragShader);
onDeleteTexture(textureId);
onDeleteTexture(fboTextureId);
onDeleteFbo(fboId);
onDeleteVbo(vboId);
}

/**

创建之前
*/
public void onCreatePre() {

}

/**

设置背景颜色
*/
public void onClearColor() {
GLES20.glClearColor(0, 0, 0, 1);
}

/**

是否启用混色
*/
public boolean onEnableBlend() {
return false;
}

/**

初始化混色
*/
private void onInitBlend() {
if (!onEnableBlend()) {
return;
}
GLES20.glEnable(GLES20.GL_BLEND);
GLES20.glBlendFunc(GLES20.GL_SRC_ALPHA, GLES20.GL_ONE_MINUS_SRC_ALPHA);
}

/**

初始化顶点坐标
*/
public void onInitVertexBuffer() {
vertexBuffer = OpenGLESUtils.getSquareVertexBuffer();
}

/**

初始化纹理坐标
*/
public void onInitCoordinateBuffer() {
if (isBindFbo) {
coordinateBuffer = OpenGLESUtils.getSquareCoordinateReverseBuffer();
} else {
coordinateBuffer = OpenGLESUtils.getSquareCoordinateBuffer();
}
}

/**

初始化Vbo
*/
public void onInitVbo() {
vboId = OpenGLESUtils.getVbo(vertexBuffer, coordinateBuffer);
}

/**

初始化Program
*/
public void onInitProgram() {
String vertexShaderCode = OpenGLESUtils.getShaderCode(context, vertexFilename);
String fragShaderCode = OpenGLESUtils.getShaderCode(context, fragFilename);

vertexShader = OpenGLESUtils.loadShader(GLES20.GL_VERTEX_SHADER, vertexShaderCode);
fragShader = OpenGLESUtils.loadShader(GLES20.GL_FRAGMENT_SHADER, fragShaderCode);

program = OpenGLESUtils.linkProgram(vertexShader, fragShader);
}

/**

创建之后
*/
public void onCreateAfter() {

}

/**

设置尺寸之前
*/
public void onChangePre() {

}

/**

设置窗口尺寸
*/
public void onViewport() {
GLES20.glViewport(0, 0, width, height);
}

/**

初始化Fbo
*/
public void onInitFbo() {
if (!isBindFbo) {
return;
}
int[] fboData = OpenGLESUtils.getFbo(width, height);
fboId = fboData[0];
fboTextureId = fboData[1];
}

/**

设置尺寸之后
*/
public void onChangeAfter() {

}

/**

绘制之前的准备
*/
public boolean onReadyToDraw() {
return true;
}

/**

绘制之前
*/
public void onDrawPre() {

}

/**

清屏
*/
public void onClear() {
GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
}

/**

使用Program
*/
public void onUseProgram() {
GLES20.glUseProgram(program);
}

/**

初始化着色器各个位置
*/
public void onInitLocation() {
aPosLocation = GLES20.glGetAttribLocation(program, “aPos”);
aCoordinateLocation = GLES20.glGetAttribLocation(program, “aCoordinate”);
uSamplerLocation = GLES20.glGetUniformLocation(program, “uSampler”);
}

/**

绑定Fbo
*/
public void onBindFbo() {
if (!isBindFbo) {
return;
}
GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, fboId);
GLES20.glFramebufferTexture2D(GLES20.GL_FRAMEBUFFER, GLES20.GL_COLOR_ATTACHMENT0,
GLES20.GL_TEXTURE_2D, fboTextureId, 0);
GLES20.glViewport(0, 0, width, height);
}

/**

绑定Vbo
*/
public void onBindVbo() {
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, vboId);
}

/**

激活并绑定纹理
*/
public void onActiveTexture(int textureId) {
this.textureId = textureId;
GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, textureId);
GLES20.glUniform1i(uSamplerLocation, 0);
}

/**

启用顶点坐标
*/
public void onEnableVertexAttributeArray() {
GLES20.glEnableVertexAttribArray(aPosLocation);
GLES20.glEnableVertexAttribArray(aCoordinateLocation);
}

/**

设置顶点坐标
*/
public void onSetVertexData() {
GLES20.glVertexAttribPointer(aPosLocation, vertexSize, GLES20.GL_FLOAT, false, vertexStride, 0);
}

/**

设置纹理坐标
*/
public void onSetCoordinateData() {
GLES20.glVertexAttribPointer(aCoordinateLocation, coordinateSize, GLES20.GL_FLOAT, false, coordinateStride, vertexBuffer.limit() * 4);
}

/**

设置其他数据
*/
public void onSetOtherData() {

}

/**

绘制
*/
public void onDraw() {
GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, vertexCount);
}

/**

禁用顶点坐标
*/
public void onDisableVertexAttributeArray() {
GLES20.glDisableVertexAttribArray(aPosLocation);
GLES20.glDisableVertexAttribArray(aCoordinateLocation);
}

/**

解除绑定
*/
public void onUnBind() {
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, 0);
GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, 0);
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, 0);
}

/**

绘制之后
*/
public void onDrawAfter() {

}

/**

删除Program
*/
public void onDeleteProgram(int program) {
GLES20.glDeleteProgram(program);
}

/**

删除Shader
*/
public void onDeleteShader(int shader) {
GLES20.glDeleteShader(shader);
}

/**

删除纹理
*/
public void onDeleteTexture(int textureId) {
GLES20.glDeleteTextures(1, new int[]{textureId}, 0);
}

/**

删除Fbo
*/
public void onDeleteFbo(int fboId) {
GLES20.glDeleteFramebuffers(1, new int[]{fboId}, 0);
}

/**

删除Vbo
*/
public void onDeleteVbo(int vboId) {
GLES20.glDeleteBuffers(1, new int[]{vboId}, 0);
}

public Context getContext() {
return context;
}

public void setContext(Context context) {
this.context = context;
}

public FloatBuffer getVertexBuffer() {
return vertexBuffer;
}

public void setVertexBuffer(FloatBuffer vertexBuffer) {
this.vertexBuffer = vertexBuffer;
}

public FloatBuffer getCoordinateBuffer() {
return coordinateBuffer;
}

public void setCoordinateBuffer(FloatBuffer coordinateBuffer) {
this.coordinateBuffer = coordinateBuffer;
}

public int getVertexSize() {
return vertexSize;
}

public void setVertexSize(int vertexSize) {
this.vertexSize = vertexSize;
}

public int getCoordinateSize() {
return coordinateSize;
}

public void setCoordinateSize(int coordinateSize) {
this.coordinateSize = coordinateSize;
}

public int getVertexStride() {
return vertexStride;
}

public void setVertexStride(int vertexStride) {
this.vertexStride = vertexStride;
}

public int getCoordinateStride() {
return coordinateStride;
}

public void setCoordinateStride(int coordinateStride) {
this.coordinateStride = coordinateStride;
}

public int getVertexCount() {
return vertexCount;
}

public void setVertexCount(int vertexCount) {
this.vertexCount = vertexCount;
}

public int getCoordinateCount() {
return coordinateCount;
}

public void setCoordinateCount(int coordinateCount) {
this.coordinateCount = coordinateCount;
}

public int getProgram() {
return program;
}

public void setProgram(int program) {
this.program = program;
}

public int getFboTextureId() {
return fboTextureId;
}

public void setFboTextureId(int fboTextureId) {
this.fboTextureId = fboTextureId;
}

public int getFboId() {
return fboId;
}

public void setFboId(int fboId) {
this.fboId = fboId;
}

public int getVboId() {
return vboId;
}

public void setVboId(int vboId) {
this.vboId = vboId;
}

public String getVertexFilename() {
return vertexFilename;
}

public void setVertexFilename(String vertexFilename) {
this.vertexFilename = vertexFilename;
}

public String getFragFilename() {
return fragFilename;
}

public void setFragFilename(String fragFilename) {
this.fragFilename = fragFilename;
}

public int getWidth() {
return width;
}

public void setWidth(int width) {
this.width = width;
}

public int getHeight() {
return height;
}

public void setHeight(int height) {
this.height = height;
}

public boolean isBindFbo() {
return isBindFbo;
}

public void setBindFbo(boolean bindFbo) {
isBindFbo = bindFbo;
}

public int getPosLocation() {
return aPosLocation;
}

public void setPosLocation(int aPosLocation) {
this.aPosLocation = aPosLocation;
}

public int getCoordinateLocation() {
return aCoordinateLocation;
}

public void setCoordinateLocation(int aCoordinateLocation) {
this.aCoordinateLocation = aCoordinateLocation;
}

public int getSamplerLocation() {
return uSamplerLocation;
}

public void setSamplerLocation(int uSamplerLocation) {
this.uSamplerLocation = uSamplerLocation;
}

public boolean isCreate() {
return isCreate;
}

public void setCreate(boolean create) {
isCreate = create;
}

public boolean isChange() {
return isChange;
}

public void setChange(boolean change) {
isChange = change;
}

public BaseRenderBean getRenderBean() {
return renderBean;
}

public void setRenderBean(BaseRenderBean renderBean) {
this.renderBean = renderBean;
}

public void updateRenderBean(BaseRenderBean renderBean) {
setRenderBean(renderBean);
}
}

代码有点长，但是里面尽可能地考虑到了渲染和扩展的需求

顶点着色器 vertex.frag

attribute vec4 aPos;
attribute vec2 aCoordinate;
varying vec2 vCoordinate;
void main(){
vCoordinate = aCoordinate;
gl_Position = aPos;
}

片元着色器 frag.frag

precision mediump float;
uniform sampler2D uSampler;
varying vec2 vCoordinate;
void main(){
gl_FragColor = texture2D(uSampler, vCoordinate);
}

注意到，里面有用到一个工具类OpenGLESUtils和实体类BaseRenderBean具体就不贴出来了，可以到Github上查看

四、BaseOesRender

注意到，BaseRender里面绑定的纹理是2D纹理，而如果想实现相机预览，则需要使用Oes纹理，所以需要创建一个BaseOesRender为相机做渲染

package com.yk.media.opengles.render.base;

import android.content.Context;
import android.graphics.SurfaceTexture;
import android.opengl.GLES11Ext;
import android.opengl.GLES20;

import com.yk.media.utils.OpenGLESUtils;

public class BaseOesRender extends BaseRender {
/**

oes纹理id
*/
private int oesTextureId;

/**

顶点变换矩阵位置
*/
private int uMatrixLocation;

/**

纹理变换矩阵位置
*/
private int uOesMatrixLocation;

/**

oes尺寸
*/
private int oesW = -1;
private int oesH = -1;

/**

顶点变换矩阵
*/
private float[] mMVPMatrix = new float[16];

/**

纹理变换矩阵
*/
private float[] mOesMatrix = {
1, 0, 0, 0,
0, 1, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1
};

/**

是否准备好绘制
*/
private boolean isReadyToDraw = false;

/**

SurfaceTexture
*/
private SurfaceTexture surfaceTexture;

/**

SurfaceTexture回调
*/
private OnSurfaceTextureListener onSurfaceTextureListener;

public BaseOesRender(Context context) {
super(context, “render/base/oes/vertex.frag”, “render/base/oes/frag.frag”);
setBindFbo(true);
oesTextureId = OpenGLESUtils.getOesTexture();
}

@Override
public void onInitCoordinateBuffer() {
setCoordinateBuffer(OpenGLESUtils.getSquareCoordinateBuffer());
}

@Override
public boolean onReadyToDraw() {
if (!isReadyToDraw) {
if (onSurfaceTextureListener != null) {
if (surfaceTexture != null) {
surfaceTexture.release();
surfaceTexture = null;
}
surfaceTexture = new SurfaceTexture(oesTextureId);
onSurfaceTextureListener.onSurfaceTexture(surfaceTexture);
isReadyToDraw = true;
} else if (surfaceTexture != null) {
surfaceTexture.attachToGLContext(oesTextureId);
isReadyToDraw = true;
} else {
return false;
}
}
return oesW != -1 && oesH != -1;
}

@Override
public void onDrawPre() {
super.onDrawPre();
mMVPMatrix = OpenGLESUtils.getMatrix(getWidth(), getHeight(), oesW, oesH);

surfaceTexture.updateTexImage();

float[] oesMatrix = new float[16];
surfaceTexture.getTransformMatrix(oesMatrix);
if (!OpenGLESUtils.isIdentityM(oesMatrix)) {
mOesMatrix = oesMatrix;
}
}

@Override
public void onInitLocation() {
super.onInitLocation();
uMatrixLocation = GLES20.glGetUniformLocation(getProgram(), “uMatrix”);
uOesMatrixLocation = GLES20.glGetUniformLocation(getProgram(), “uOesMatrix”);
}

@Override
public void onActiveTexture(int textureId) {
GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, textureId);
GLES20.glUniform1i(getSamplerLocation(), 0);
}

@Override
public void onSetOtherData() {
super.onSetOtherData();
GLES20.glUniformMatrix4fv(uMatrixLocation, 1, false, mMVPMatrix, 0);
GLES20.glUniformMatrix4fv(uOesMatrixLocation, 1, false, mOesMatrix, 0);
}

@Override
public void onRelease() {
super.onRelease();
onDeleteTexture(oesTextureId);
}

/**