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View Full Version : Opengl Create FBO- fatal signal 11 error



alireza.pir
07-30-2015, 01:34 AM
in my android game, i want to render My scene in the FBO and a texture attached to it, and use that texture later, But When i use glGenFramebuffers i get this error:


07-30 06:17:27.839: A/libc(1338): Fatal signal 11 (SIGSEGV), code 1, fault addr 0xd0 in tid 1353 (GLThread 157)
here is my codes if needed:

createTexture function:


public int CreateTexture(int w, int h){
int[] textureId = new int[1];
int i;
i = GLES20.glGetError();
GLES20.glGenTextures(1, textureId,0);
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, textureId[0]);
GLES20.glTexImage2D(GLES20.GL_TEXTURE_2D, 0, GLES20.GL_RGBA, w, h, 0, GLES20.GL_RGBA, GLES20.GL_FLOAT, null);
ijad kon vali ba hichi poresh nakon hanooz
GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_NEAREST);
GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_NEAREST);
GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_CLAMP_TO_EDGE);
GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_CLAMP_TO_EDGE);

if(i!=0){
Log.d("ERROR", "ERROR Happend"+i+"");
return i;
}

GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, 0);
return textureId[0];
}


and onDrawFrame:


public synchronized void onDrawFrame(GL10 gl) {
if(first){
int renderTexture;
renderTexture = CreateTexture(128,128 );
GLES20.glGenFramebuffers(1, FBO,0);
GLES20.glFramebufferTexture2D(GLES20.GL_FRAMEBUFFE R, GLES20.GL_COLOR_ATTACHMENT0, GLES20.GL_TEXTURE_2D, renderTexture, 0);
first = false;
}
GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, FBO[0]);
// Some 'global' settings.
//gl.glEnableClientState(GLES20.GL_VERTEX_ATTRIB_ARR AY_ENABLED);
gl.glEnableClientState(GLES10.GL_VERTEX_ARRAY);

gl.glVertexPointer(3, GLES20.GL_FLOAT, 0, mBufVertices);
// Enable color array.
gl.glEnableClientState(GLES10.GL_COLOR_ARRAY);
gl.glColorPointer(4, GLES20.GL_FLOAT, 0, mBufColors);
//inja khasiate transparent ro faAl mikonim ke betoonim too CurlPage be kaaghaz alpha bedim
gl.glEnable(GLES20.GL_BLEND);
gl.glBlendFunc(GLES20.GL_SRC_ALPHA, GLES20.GL_ONE_MINUS_SRC_ALPHA);
gl.glDisable(GLES10.GL_LIGHTING);
gl.glDisable(GLES20.GL_TEXTURE_2D);
gl.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, mVerticesCountFront);
int backStartIdx = Math.max(0, mVerticesCountFront - 2);
//Log.d("mVerticesCountFront", ""+mVerticesCountFront+"");
int backCount = mVerticesCountFront + mVerticesCountBack - backStartIdx;

// Draw back facing blank vertices.
//gl.glColor4f(1.0f, 0.0f, 0.0f, 0.5f);
gl.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, backStartIdx, backCount);

// Disable textures and color array.
gl.glDisableClientState(GLES10.GL_TEXTURE_COORD_AR RAY);
gl.glDisableClientState(GLES10.GL_COLOR_ARRAY);

GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, 0);
gl.glDisableClientState(GLES10.GL_VERTEX_ARRAY);
}
any idea of Why i get such error?

GClements
07-30-2015, 04:14 AM
Has FBO been allocated (i.e. "FBO = new int[1]")?