I took the source from API demos (TriangleRenderer.java)
Here's the code on how textures are loaded in onSurfaceCreated():
////////////////////////////////////////////////////////////////
/*
* Create our texture. This has to be done each time the
* surface is created.
*/
int[] textures = new int[1];
gl.glGenTextures(1, textures, 0);
mTextureID = textures[0];
gl.glBindTexture(GL10.GL_TEXTURE_2D, mTextureID);
gl.glTexParameterf(GL10.GL_TEXTURE_2D,
GL10.GL_TEXTURE_MIN_FILTER,
GL10.GL_NEAREST);
gl.glTexParameterf(GL10.GL_TEXTURE_2D,
GL10.GL_TEXTURE_MAG_FILTER,
GL10.GL_LINEAR);
gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S,
GL10.GL_CLAMP_TO_EDGE);
gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T,
GL10.GL_CLAMP_TO_EDGE);
gl.glTexEnvf(GL10.GL_TEXTURE_ENV, GL10.GL_TEXTURE_ENV_MODE,
GL10.GL_REPLACE);
InputStream is = mContext.getResources()
.openRawResource(R.drawable.robot);
Bitmap bitmap;
try {
bitmap = BitmapFactory.decodeStream(is);
} finally {
try {
is.close();
} catch(IOException e) {
// Ignore.
}
}
GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, bitmap, 0);
bitmap.recycle();
////////////////////////////////////////////////////////////////
And here's how I mapped my texture:
/////////////////////////////////////////////////////////////////
public void onDrawFrame(GL10 gl) {
//Init
gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
gl.glMatrixMode(GL10.GL_MODELVIEW);
gl.glLoadIdentity();
//Draw Cube
gl.glPushMatrix();
gl.glTranslatef(0, 0, -2);
gl.glRotatef(azimuthZ, 0, 0, 1); //azimuthZ is
from the sensors
//texBuff and boxBuff are texture and box coordinates
gl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, texBuff);
gl.glVertexPointer(3, GL10.GL_FLOAT, 0, boxBuff);
//top
gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, 4);
//bottom
gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 4, 4);
// followed by left, right, front and back
sides...
gl.glPopMatrix();
/////////////////////////////////////////////////////////////////
Problem:
1. The box is rendering normally.
2. I press 'Call' button, the Dialer app comes up.
3. I press 'Back' button. My box app comes up.
4. The texture became corrupted...
- This does not happen if I press back while in the box app, and re-
launch the box app.
- This also does not happen in the Textured Triangle in API demos.
I've no idea what did I do wrong. -_-
Thank you in advance.
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