/*************************************************************************/
/*  GodotRenderer.java                                                   */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
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/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
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/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
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package org.godotengine.godot;

import org.godotengine.godot.plugin.GodotPlugin;
import org.godotengine.godot.plugin.GodotPluginRegistry;
import org.godotengine.godot.utils.GLUtils;

import android.opengl.GLSurfaceView;

import javax.microedition.khronos.egl.EGLConfig;
import javax.microedition.khronos.opengles.GL10;

/**
 * Godot's renderer implementation.
 */
class GodotRenderer implements GLSurfaceView.Renderer {

	private final GodotPluginRegistry pluginRegistry;
	private boolean activityJustResumed = false;

	GodotRenderer() {
		this.pluginRegistry = GodotPluginRegistry.getPluginRegistry();
	}

	public void onDrawFrame(GL10 gl) {
		if (activityJustResumed) {
			GodotLib.onRendererResumed();
			activityJustResumed = false;
		}

		GodotLib.step();
		for (int i = 0; i < Godot.singleton_count; i++) {
			Godot.singletons[i].onGLDrawFrame(gl);
		}
		for (GodotPlugin plugin : pluginRegistry.getAllPlugins()) {
			plugin.onGLDrawFrame(gl);
		}
	}

	public void onSurfaceChanged(GL10 gl, int width, int height) {
		GodotLib.resize(width, height);
		for (int i = 0; i < Godot.singleton_count; i++) {
			Godot.singletons[i].onGLSurfaceChanged(gl, width, height);
		}
		for (GodotPlugin plugin : pluginRegistry.getAllPlugins()) {
			plugin.onGLSurfaceChanged(gl, width, height);
		}
	}

	public void onSurfaceCreated(GL10 gl, EGLConfig config) {
		GodotLib.newcontext(GLUtils.use_32);
		for (GodotPlugin plugin : pluginRegistry.getAllPlugins()) {
			plugin.onGLSurfaceCreated(gl, config);
		}
	}

	void onActivityResumed() {
		// We defer invoking GodotLib.onRendererResumed() until the first draw frame call.
		// This ensures we have a valid GL context and surface when we do so.
		activityJustResumed = true;
	}

	void onActivityPaused() {
		GodotLib.onRendererPaused();
	}
}
