artrointel / canvasoverglview Goto Github PK

https://github.com/artrointel/CanvasOverGLES/blob/main/app/src/main/java/com/artrointel/canvasovergles/glview/renderers/gl/GLTexture.java#L29
static generateTexture like

    Bitmap target = bitmap;

    // bitmap should be vertically flipped in the GL space
    if (flipY) {
        Matrix xForm = new Matrix();
        xForm.setScale(1, -1);
        target = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), xForm, false);
        bitmap.recycle();
    }

    GLES20.glBindTexture(GL_TEXTURE_2D, texture.mId);
    GLUtils.texImage2D(GLES20.GL_TEXTURE_2D, 0, target, 0);

    target.recycle();

https://github.com/artrointel/CanvasOverGLES/blob/a6a07dab393f4c17009de382da07cb1e9d790070/app/src/main/java/com/artrointel/canvasovergles/glview/renderers/CanvasRenderer.java#L64

public void setCanvasBufferUpdatedListener(@nullable CanvasBufferUpdatedListener listener) {
mSurfaceTextureListener = listener;
mSurfaceTexture.setOnFrameAvailableListener(mSurfaceTextureListener); // call updateTexImage() to render canvas by ext. image safely. should be called in gl thread.
}

and also have

public void unlockCanvasAndPost() {
unlockCanvasAndPostInternal();
if(mSurfaceTextureListener == null) {
// unsafely update if there is no listener.
mSurfaceTexture.updateTexImage();
}
}

https://github.com/artrointel/CanvasOverGLES/blob/a6a07dab393f4c17009de382da07cb1e9d790070/app/src/main/java/com/artrointel/canvasovergles/glview/renderers/gl/GLTextureSet.java#L20

add glUniform1i(location, slot); to activate texture obj.