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POglDrawTexfOES draws black texture on phone, and correct in emulator
 

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  1. POglDrawTexfOES draws black texture on phone, and correct in emulator
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    <p>I'm writing a 2D game using OpenGL, using png images (64x64 pixels, with transparency) stored in my resources. </p> <p>My code looks like this : </p> <pre><code>import javax.microedition.khronos.egl.EGLConfig; import javax.microedition.khronos.opengles.GL10; import javax.microedition.khronos.opengles.GL11; import javax.microedition.khronos.opengles.GL11Ext; import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.opengl.GLUtils; import android.opengl.GLSurfaceView.Renderer; public class TestGLRenderer implements Renderer { private int mTexGLNames[]; private Context mContext; public TestGLRenderer(Context ctx) { mContext = ctx; } public void onSurfaceCreated(GL10 gl, EGLConfig config) { // setup the gl renderer gl.glClearColor(0.2f, 0.4f, 0.6f, 1.0f); gl.glEnable(GL10.GL_TEXTURE_2D); gl.glShadeModel(GL10.GL_FLAT); gl.glEnable(GL10.GL_BLEND); gl.glBlendFunc(GL10.GL_ONE, GL10.GL_ONE_MINUS_SRC_ALPHA); // reserve GL texture names mTexGLNames = new int[1]; gl.glGenTextures(1, mTexGLNames, 0); // load image from resources Bitmap b; b = BitmapFactory.decodeResource(mContext.getResources(), R.drawable.image); // load image in opengl gl.glBindTexture(GL10.GL_TEXTURE_2D, mTexGLNames[0]); GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, b, 0); } public void onDrawFrame(GL10 gl) { gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT); gl.glColor4f(1.0f, 1.0f, 1.0f, 1.0f); gl.glBindTexture(GL10.GL_TEXTURE_2D, mTexGLNames[0]); int crop[] = new int[] { 0, 64, 64, -64 }; ((GL11) gl).glTexParameteriv(GL10.GL_TEXTURE_2D, GL11Ext.GL_TEXTURE_CROP_RECT_OES, crop, 0); ((GL11Ext) gl).glDrawTexfOES(160, 240, 0, 64, 64); } public void onSurfaceChanged(GL10 gl, int w, int h) { } } </code></pre> <p>The result is working as expected in the emulator (running Android 2.2), but the image appears as a black square on my phone (LG-P500, Android 2.2). Attached are screenshots from both the emulator and my phone. </p> <p>Is there something wrong with my code, or is it a problem with my phone (my phone can run other 3D games without problems) ?</p> <p><img src="https://i.stack.imgur.com/0OXRb.png" alt="Screenshot from the emulator"> <img src="https://i.stack.imgur.com/UbqQl.png" alt="Screenshot from my phone"></p>
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