helloworld.rs revision e5f2f66f8c802d64ecf869081036ae13d4e9e19c 
1// Copyright (C) 2011 The Android Open Source Project
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//      http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15#pragma version(1)
16
17// Tell which java package name the reflected files should belong to
18#pragma rs java_package_name(com.example.android.rs.helloworld)
19
20// Built-in header with graphics API's
21#include "rs_graphics.rsh"
22
23// gTouchX and gTouchY are variables that will be reflected for use
24// by the java API. We can use them to notify the script of touch events.
25int gTouchX;
26int gTouchY;
27
28// This is invoked automatically when the script is created
29void init() {
30    gTouchX = 50.0f;
31    gTouchY = 50.0f;
32}
33
34int root(void) {
35
36    // Clear the background color
37    rsgClearColor(0.0f, 0.0f, 0.0f, 0.0f);
38    // Tell the runtime what the font color should be
39    rsgFontColor(1.0f, 1.0f, 1.0f, 1.0f);
40    // Introuduce ourselves to the world by drawing a greeting
41    // at the position user touched on the screen
42    rsgDrawText("Hello World!", gTouchX, gTouchY);
43
44    // Return value tells RS roughly how often to redraw
45    // in this case 20 ms
46    return 20;
47}
48