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Opengl Create FBO- fatal signal 11 error

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#1 alireza.pir   Members   -  Reputation: 132

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Posted Today, 12:59 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){
Log.d("StartCreateTexture", "StartCreateTexture");
//GLES20.glGetError() ;
int[] textureId = new int[1];
int i;
//ijad mikonim 1 Adad texturte ro rooye textureID 

i = GLES20.glGetError();
GLES20.glGenTextures(1, textureId,0);
//BindTexture miad texturo ro baraaye call shodan amaade mikone
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, textureId[0]);
//texture nahaE ro ijaad mikonim
GLES20.glTexImage2D(GLES20.GL_TEXTURE_2D, 0, GLES20.GL_RGBA, w, h, 0, GLES20.GL_RGBA, GLES20.GL_FLOAT, null);
//in null tooye voroodie akharie bala, mige ke fazaa ro baraye texture 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_FRAMEBUFFER, 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_ARRAY_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_ARRAY);
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?


Edited by alireza.pir, Today, 01:15 AM.


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#2 WiredCat   Members   -  Reputation: 640

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Posted Today, 02:31 AM

first of all textures in opengl are unsigned int not int

 

second thing you mess es 1.0 with es 2.0

 

 

es 1.0 may support GL_VERTEX_ARRAY,GL_COLOR_ARRAY etc

 

but ES 2.0 doesnt!

 

 

you have to create a vertex buffer like:

glGenBuffers(1, &arrow_buff);
	glBindBuffer(GL_ARRAY_BUFFER, arrow_buff);
	glBufferData(GL_ARRAY_BUFFER, sizeof(THUDItem) * 4, WIND_ARROW, GL_STATIC_DRAW);

	glBindBuffer(GL_ARRAY_BUFFER, 0);

where arrow_buff is unsigned int (or GLuint)

struct THUDItem
{
vec3 v;
vec3 c;
vec3 n;
vec2 t;
};

THUDItem WIND_ARROW[4]; //the array

 

 

 

 

===

i believe error occurs when you call glDrawArrays, btw i am surprised even that compiles i have no idea how can you mess two versions of ogl es.

additionally you cant call

gl.glDisable(GLES10.GL_LIGHTING);
gl.glDisable(GLES20.GL_TEXTURE_2D);

 

using es 2.0 so either way use es 1 or es 2, i recommed at least 2.0 and forget about 1.0

 

 

es 2.0 doesnt support such functions like

glEnableClientState(GLES10.GL_VERTEX_ARRAY);

you need to write shaders you dont call gl lighting or gl_texture_2d

 

seriously learn more modern ogl dud

 

 

http://www.learnopengles.com/


Edited by WiredCat, Today, 02:35 AM.






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