CODEWITHSUNDEEP
androidopengl-esandroid-graphics
Fr0stDev1
Fr0stDev1

Reputation: 143

Bind GLES texture to GL_TEXTURE_2D from GL_TEXTURE_EXTERNAL_OES

I have a texture, bound to GL_TEXTURE_EXTERNAL_OES target

    GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, textures[0]);
    GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_CLAMP_TO_EDGE);
    GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_CLAMP_TO_EDGE);
    GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_NEAREST);
    GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_NEAREST);

How can rebind it to GL_TEXTURE_2D target? GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, textures[0]); provides error

Upvotes: 2

Views: 3551

Answers (1)

Nicol Bolas
Nicol Bolas

Reputation: 473174

You can't. The texture target is a fundamental part of the texture object. If you have an external texture, you cannot treat it like a GL_TEXTURE_2D. At all.

This means if you want to bind it, you must bind it as a GL_TEXTURE_EXTERNAL_OES texture. If you want to use it in a sampler, that sampler must be of type samplerExternalOES rather than sampler2D (and your shader must enable the appropriate extension). And so forth.

Upvotes: 3

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