我在Android上制作了实时过滤相机应用程序。虽然我不是OpenGL ES 2.0的有经验的用户，但由于来自互联网的许多信息，我可以实现实时过滤相机预览。现在，我试图存储实时滤波后的图像，但是，＃34;致命信号11（SIGSEGV）位于0xa53e7688（代码= 1）＆＃34;错误发生了。
这是我的计划。
来自PictureCallback＆gt;＆gt;的字节数组转换为Bitmap＆gt;＆gt; OpenGL ES渲染器处理＆gt;＆gt;从返回的位图保存为文件
而且......这是我的代码。
public class CameraRenderer implements GLSurfaceView.Renderer, SurfaceTexture.OnFrameAvailableListener {
private static final String vertexShaderCode
= "attribute vec4 vPosition;\n"
+ "attribute vec2 vTexCoord;\n"
+ "varying vec2 texCoord;\n"
+ "void main() {\n"
+ " gl_Position = vPosition;\n"
+ " texCoord = vTexCoord;\n"
+ "}";
private static final String fragmentShaderCodePreview
= "#extension GL_OES_EGL_image_external : require\n"
+ "precision mediump float;\n"
+ "uniform samplerExternalOES sTexture;\n"
+ "uniform float brightness;\n"
+ "uniform float contrast;\n"
+ "uniform float saturation;\n"
+ "varying vec2 texCoord;\n"
+ "void main() {\n"
+ " vec4 tex = texture2D(sTexture, texCoord);\n"
+ " vec3 pBrightness = clamp(tex.rgb + brightness, 0.0, 1.0);\n"
+ " float scale = contrast + 1.0;\n"
+ " float translate = -0.5 * scale + 0.5;\n"
+ " vec3 pContrast = clamp(pBrightness.rgb * scale + translate, 0.0, 1.0);\n"
+ " float sr = (1.0 - saturation) * 0.213;\n"
+ " float sg = (1.0 - saturation) * 0.715;\n"
+ " float sb = (1.0 - saturation) * 0.072;\n"
+ " float psr = clamp(pContrast.r * (sr + saturation) + pContrast.g * sg + pContrast.b * sb, 0.0, 1.0);\n"
+ " float psg = clamp(pContrast.r * sr + pContrast.g * (sg + saturation) + pContrast.b * sb, 0.0, 1.0);\n"
+ " float psb = clamp(pContrast.r * sr + pContrast.g * sg + pContrast.b * (sb + saturation), 0.0, 1.0);\n"
+ " gl_FragColor = vec4(psr, psg, psb, tex.a);\n"
+ "}";
private static final String fragmentShaderCodeImage
= "precision mediump float;\n"
+ "uniform sampler2D sTexture;\n"
+ "uniform float brightness;\n"
+ "uniform float contrast;\n"
+ "uniform float saturation;\n"
+ "varying vec2 texCoord;\n"
+ "void main() {\n"
+ " vec4 tex = texture2D(sTexture, texCoord);\n"
+ " vec3 pBrightness = clamp(tex.rgb + brightness, 0.0, 1.0);\n"
+ " float scale = contrast + 1.0;\n"
+ " float translate = -0.5 * scale + 0.5;\n"
+ " vec3 pContrast = clamp(pBrightness.rgb * scale + translate, 0.0, 1.0);\n"
+ " float sr = (1.0 - saturation) * 0.213;\n"
+ " float sg = (1.0 - saturation) * 0.715;\n"
+ " float sb = (1.0 - saturation) * 0.072;\n"
+ " float psr = clamp(pContrast.r * (sr + saturation) + pContrast.g * sg + pContrast.b * sb, 0.0, 1.0);\n"
+ " float psg = clamp(pContrast.r * sr + pContrast.g * (sg + saturation) + pContrast.b * sb, 0.0, 1.0);\n"
+ " float psb = clamp(pContrast.r * sr + pContrast.g * sg + pContrast.b * (sb + saturation), 0.0, 1.0);\n"
+ " gl_FragColor = vec4(psr, psg, psb, tex.a);\n"
+ "}";
private static float[] mSquareCoords = {
1.0f, 1.0f, 0.0f,
-1.0f, 1.0f, 0.0f,
-1.0f, -1.0f, 0.0f,
1.0f, -1.0f, 0.0f
};
private static float[] mTextureCoordsR = {
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 1.0f,
1.0f, 0.0f
};
private static float[] mTextureCoordsF = {
1.0f, 0.0f,
1.0f, 1.0f,
0.0f, 1.0f,
0.0f, 0.0f
};
private static short[] mDrawOrder = {0, 1, 2, 0, 2, 3};
private FloatBuffer mVertexBuffer;
private FloatBuffer mTexCoordBuffer;
private ShortBuffer mDrawListBuffer;
private SurfaceTexture mSTexture;
private static int mProgramPreview, mProgramImage;
private static int[] mTextureNames;
private boolean mUpdateST = false;
......
CameraRenderer(CameraView view, CameraParams cameraParams, CameraActivity.CameraHandler handler) {
......
mVertexBuffer = ByteBuffer.allocateDirect(mSquareCoords.length*4).order(ByteOrder.nativeOrder()).asFloatBuffer();
mVertexBuffer.put(mSquareCoords).position(0);
if (mCameraParams.mCameraMode) {
mTexCoordBuffer = ByteBuffer.allocateDirect(mTextureCoordsR.length*4).order(ByteOrder.nativeOrder()).asFloatBuffer();
mTexCoordBuffer.put(mTextureCoordsR).position(0);
}
else {
mTexCoordBuffer = ByteBuffer.allocateDirect(mTextureCoordsF.length*4).order(ByteOrder.nativeOrder()).asFloatBuffer();
mTexCoordBuffer.put(mTextureCoordsF).position(0);
}
mDrawListBuffer = ByteBuffer.allocateDirect(mDrawOrder.length*2).order(ByteOrder.nativeOrder()).asShortBuffer();
mDrawListBuffer.put(mDrawOrder).position(0);
}
@Override
public void onSurfaceCreated(GL10 gl10, EGLConfig eglConfig) {
if (mCameraParams.mLoadSuccess == false) initCameraParams();
initTexture();
mSTexture = new SurfaceTexture(mTextureNames[0]);
mSTexture.setOnFrameAvailableListener(this);
......
mCamera = Camera.open(mCameraParams.mCameraID);
......
mCamera.setPreviewTexture(mSTexture);
......
GLES20.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
loadShader();
mPreviewThread = new PreviewThread();
mPreviewThread.start();
}
@Override
public void onSurfaceChanged(GL10 gl10, int width, int height) {
GLES20.glViewport(0, 0, width, height);
}
@Override
public void onFrameAvailable(SurfaceTexture surfaceTexture) {
mUpdateST = true;
if (mCameraView != null) mCameraView.requestRender();
}
@Override
public void onDrawFrame(GL10 gl10) {
synchronized (this) {
GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
if (mUpdateST) {
mSTexture.updateTexImage();
mUpdateST = false;
}
GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
GLES20.glUseProgram(mProgramPreview);
int positionHandle = GLES20.glGetAttribLocation(mProgramPreview, "vPosition");
int texCoordHandle = GLES20.glGetAttribLocation(mProgramPreview, "vTexCoord");
int TextureHandle = GLES20.glGetUniformLocation(mProgramPreview, "sTexture");
GLES20.glEnableVertexAttribArray(positionHandle);
GLES20.glEnableVertexAttribArray(texCoordHandle);
GLES20.glVertexAttribPointer(positionHandle, 3, GLES20.GL_FLOAT, false, 0, mVertexBuffer);
GLES20.glVertexAttribPointer(texCoordHandle, 2, GLES20.GL_FLOAT, false, 0, mTexCoordBuffer);
GLES20.glUniform1i(TextureHandle, 0);
int bright = GLES20.glGetUniformLocation(mProgramPreview, "brightness");
int contr = GLES20.glGetUniformLocation(mProgramPreview, "contrast");
int satur = GLES20.glGetUniformLocation(mProgramPreview, "saturation");
GLES20.glUniform1f(bright, mCameraParams.mBrightness / 200.0f);
GLES20.glUniform1f(contr, mCameraParams.mContrast / 200.0f);
GLES20.glUniform1f(satur, (mCameraParams.mSaturation + 100) / 100.0f);
GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, mTextureNames[0]);
GLES20.glDrawElements(GLES20.GL_TRIANGLES, mDrawOrder.length, GLES20.GL_UNSIGNED_SHORT, mDrawListBuffer);
GLES20.glDisableVertexAttribArray(positionHandle);
GLES20.glDisableVertexAttribArray(texCoordHandle);
}
}
public void initTexture() {
mTextureNames = new int[2];
GLES20.glGenTextures(mTextureNames.length, mTextureNames, 0);
GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, mTextureNames[0]);
GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_CLAMP_TO_EDGE);
GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_CLAMP_TO_EDGE);
GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_NEAREST);
GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR);
GLES20.glActiveTexture(GLES20.GL_TEXTURE1);
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mTextureNames[1]);
GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_NEAREST);
GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_NEAREST);
}
public void onSurfaceDestroyed() {
......
}
public static void loadShader() {
int vShader = GLES20.glCreateShader(GLES20.GL_VERTEX_SHADER);
GLES20.glShaderSource(vShader, vertexShaderCode);
GLES20.glCompileShader(vShader);
int[] compiled = new int[1];
GLES20.glGetShaderiv(vShader, GLES20.GL_COMPILE_STATUS, compiled, 0);
if (compiled[0] == 0) {
Log.e("CheckLog", "Could not compile vshader");
Log.v("CheckLog", "Could not compile vshader:" + GLES20.glGetShaderInfoLog(vShader));
GLES20.glDeleteShader(vShader);
vShader = 0;
}
int fShaderPreview = GLES20.glCreateShader(GLES20.GL_FRAGMENT_SHADER);
GLES20.glShaderSource(fShaderPreview, fragmentShaderCodePreview);
GLES20.glCompileShader(fShaderPreview);
GLES20.glGetShaderiv(fShaderPreview, GLES20.GL_COMPILE_STATUS, compiled, 0);
if (compiled[0] == 0) {
Log.e("CheckLog", "Could not compile fshader");
Log.v("CheckLog", "Could not compile fshader:" + GLES20.glGetShaderInfoLog(fShaderPreview));
GLES20.glDeleteShader(fShaderPreview);
fShaderPreview = 0;
}
mProgramPreview = GLES20.glCreateProgram();
GLES20.glAttachShader(mProgramPreview, vShader);
GLES20.glAttachShader(mProgramPreview, fShaderPreview);
GLES20.glLinkProgram(mProgramPreview);
int fShaderImage = GLES20.glCreateShader(GLES20.GL_FRAGMENT_SHADER);
GLES20.glShaderSource(fShaderImage, fragmentShaderCodeImage);
GLES20.glCompileShader(fShaderImage);
GLES20.glGetShaderiv(fShaderImage, GLES20.GL_COMPILE_STATUS, compiled, 0);
if (compiled[0] == 0) {
Log.e("CheckLog", "Could not compile fshader");
Log.v("CheckLog", "Could not compile fshader:" + GLES20.glGetShaderInfoLog(fShaderImage));
GLES20.glDeleteShader(fShaderImage);
fShaderImage = 0;
}
mProgramImage = GLES20.glCreateProgram();
GLES20.glAttachShader(mProgramImage, vShader);
GLES20.glAttachShader(mProgramImage, fShaderImage);
GLES20.glLinkProgram(mProgramImage);
}
public static void deleteTextures() {
if (mTextureNames != null) {
GLES20.glDeleteTextures(mTextureNames.length, mTextureNames, 0);
mTextureNames = null;
}
}
public Bitmap renderBitmap(Bitmap preBitmap) {
synchronized (this) {
GLES20.glEnable(GLES20.GL_TEXTURE_2D);
GLES20.glActiveTexture(GLES20.GL_TEXTURE1);
GLUtils.texImage2D(GLES20.GL_TEXTURE_2D, 0, preBitmap, 0);
preBitmap.recycle();
GLES20.glUseProgram(mProgramImage);
int positionHandle = GLES20.glGetAttribLocation(mProgramImage, "vPosition");
int texCoordHandle = GLES20.glGetAttribLocation(mProgramImage, "vTexCoord");
GLES20.glEnableVertexAttribArray(positionHandle);
GLES20.glEnableVertexAttribArray(texCoordHandle);
GLES20.glVertexAttribPointer(positionHandle, 3, GLES20.GL_FLOAT, false, 0, mVertexBuffer);
GLES20.glVertexAttribPointer(texCoordHandle, 2, GLES20.GL_FLOAT, false, 0, mTexCoordBuffer);
int bright = GLES20.glGetUniformLocation(mProgramImage, "brightness");
int contr = GLES20.glGetUniformLocation(mProgramImage, "contrast");
int satur = GLES20.glGetUniformLocation(mProgramImage, "saturation");
GLES20.glUniform1f(bright, mCameraParams.mBrightness / 200.0f);
GLES20.glUniform1f(contr, mCameraParams.mContrast / 200.0f);
GLES20.glUniform1f(satur, (mCameraParams.mSaturation + 100) / 100.0f);
GLES20.glActiveTexture(GLES20.GL_TEXTURE1);
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mTextureNames[1]);
GLES20.glDrawElements(GLES20.GL_TRIANGLES, mDrawOrder.length, GLES20.GL_UNSIGNED_SHORT, mDrawListBuffer);
GLES20.glDisableVertexAttribArray(positionHandle);
GLES20.glDisableVertexAttribArray(texCoordHandle);
GLES20.glDisable(GLES20.GL_TEXTURE_2D);
IntBuffer intBuffer = IntBuffer.allocate(preBitmap.getWidth() * preBitmap.getHeight());
GLES20.glReadPixels(0, 0, preBitmap.getWidth(), preBitmap.getHeight(), GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, intBuffer);
Bitmap postBitmap = Bitmap.createBitmap(preBitmap.getWidth(), preBitmap.getHeight(), Bitmap.Config.ARGB_8888);
postBitmap.copyPixelsFromBuffer(intBuffer);
return postBitmap;
}
}
......
}
正如您可以在此代码中检查它，我尝试制作两个OpenGL程序并为多渲染器生成两个OpenGL纹理。但是，当调用glDrawElements方法中的renderBitmap方法时，错误就像我告诉的那样发生了。我不知道为什么，因为我不擅长OpenGL编程。请帮我。 ： - （