android - Change GlSurfaceView renderer -


i looked on net in order find out if possible change renderer of glsurfaceview on flight. reason want change opengl program, , initiate attributes , unified params vertex , fragment shader , don't want change require create brand new glsurfaceview brand new renderer.

it seems reasonable operation should doable.

note: haven't implemented following.

glsurfaceview.renderer interface. implement 3 times. twice different opengl renderers, , 1 time attached glsurfaceview. latter dispatches 1 of former, , allows change renderer dispatches. code must hold reference renderer, , must synchronized draw calls (though don't know).

be aware cannot switch opengles context data. shared between renderer instances.

class dispatchingrenderer implements glsurfaceview.renderer {     private class renderer1 implements glsurfaceview.renderer {        ...     }     private class renderer2 implements glsurfaceview.renderer {        ...     }      public dispatchingrenderer() {         this.r1 = new renderer1();         this.r2 = new renderer2();          this.currentrenderer = this.r1;     }     public void togglerenderer() {         if(this.currentrenderer == this.r1) {             this.currentrenderer = this.r2;         } else if (this.currentrenderer == this.r2) {             this.currentrenderer = this.r1;         }     }     public void onsurfacecreated(gl10 gl, eglconfig config) {         // one-time setup     }     public void onsurfacechanged(gl10 gl, int w, int h) {         this.currentrenderer.onsurfacechanged(gl, w, h);     }     public void ondrawframe(gl10 gl) {         this.currentrenderer.ondrawframe(gl);     } }

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