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Patrick
Patrick
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Texture loading issue with open gl es on android

I'm programming an app with open gl es on android in java. The app uses 9 textures during a render loop pass. A depth, position, normal, albedo, noise, ssao, ssao blur and two image textures for the models I draw. The problem is that 9/10 times, the image textures fail to load. I get no gl error during or after loading the texture. I get an error 1282 when I bind the texture 8 and 9 during the draw call. But only when they don't load/show up. When they load and show up I get no error and they are displayed correctly on the primitives.

enter image description here enter image description here

According to the documentation of glBindTexture, the method generates the error code 1282 (GL_INVALID_OPERATION) if texture was previously created with a target that doesn't match that of the target. The only target I use in the whole application is GL_TEXTURE_2D, so I dont understand why I get this error.

Since I'm using a deferred rendering pipeline, I thought that maybe the albedo buffer is messed up, but I could rule that out by setting constant colors for the whole scene directly in the fragment shader of the geometry pass, and that is working fine every time.

I managed to take gpu-snapshots of both cases using snapdragon profiler to debug the app/profile the gpu (Adreno 630). I could verify that all the uniforms are correct, the attribute arrays are also correct and the correct units are active in both cases. The difference i could notice in the error case is that both image textures are missing, the rest is there. These are all the textures on the GPU when they load:

enter image description here

Here, in the other snapshot they are missing, even though it is the exact same code that loads the textures. In both cases i get valid handles/indexes when I call glGenTexture.

enter image description here

It just seems that somehow the texures arent loaded anymore during the draw call.

The image textures are being loaded like this

AssetManager assetManager = context.getAssets();
InputStream stream = assetManager.open(id.getResourceName());
int[] textureHandle = new int[1];

BitmapFactory.Options option = new BitmapFactory.Options();
option.inScaled = false;
Bitmap bitmap = BitmapFactory.decodeStream(stream, null, option);
//GLES30.glActiveTexture(GLES30.GL_TEXTURE5);
GLES30.glGenTextures(1, textureHandle, 0);
GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, textureHandle[0]);
GLES30.glTexParameteri(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MIN_FILTER, GLES30.GL_NEAREST);
GLES30.glTexParameteri(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MAG_FILTER, GLES30.GL_LINEAR);
GLES30.glTexParameteri(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_WRAP_S, GLES30.GL_MIRRORED_REPEAT);
GLES30.glTexParameteri(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_WRAP_T, GLES30.GL_MIRRORED_REPEAT);
if (bitmap != null) {
    Log.d(TextureLoader.class.getSimpleName(), "Texture format: " + GLUtils.getInternalFormat(bitmap));
    GLUtils.texImage2D(GLES30.GL_TEXTURE_2D, 0, bitmap, 0);
    bitmap.recycle();
}
GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, 0);
        
ShaderUtil.checkGLError(TextureLoader.class.getSimpleName(), "Failed to load texture");

Log.d("Texture id", String.valueOf(textureHandle[0]));

return textureHandle[0];
  • The code above is executed during the onSurfaceCreated invocation, so I have a valid open gl context.
  • The code above is executed two times, once per image texture in sequential order.
  • Both textures are of type 32 bit rgba (png) 512px x 512px

The code below is executed in the render loop. I have multiple models, some are using one texture and some the other one.

GLES30.glActiveTexture(GLES30.GL_TEXTURE5);
GLES30.glUniform1i(shaderHandles.getTextureMapHandle(), 5);
ShaderUtil.checkGLError("Render loop", "Activate unit");
GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, textureDataHandle);
ShaderUtil.checkGLError("Render loop", "Activate " + textureDataHandle);

I've been debugging for multiple days now, so I appreciate any help. Thank you

Patrick
  • 111
  • 3