1 /*
 2  * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  *
 5  * This code is free software; you can redistribute it and/or modify it
 6  * under the terms of the GNU General Public License version 2 only, as
 7  * published by the Free Software Foundation.  Oracle designates this
 8  * particular file as subject to the "Classpath" exception as provided
 9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
18  * 2 along with this work; if not, write to the Free Software Foundation,
19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20  *
21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22  * or visit www.oracle.com if you need additional information or have any
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24  */
25 package wrap.opengl;
26 
27 import javax.imageio.ImageIO;
28 import java.awt.image.BufferedImage;
29 import java.awt.image.DataBufferByte;
30 import java.io.IOException;
31 import java.io.InputStream;
32 import java.lang.foreign.Arena;
33 import java.lang.foreign.MemorySegment;
34 import java.lang.foreign.ValueLayout;
35 
36 
37 public class GLTexture {
38     public final Arena arena;
39     public final MemorySegment data;
40     public final int width;
41     public final int height;
42     public int idx;
43 
44     public GLTexture(Arena arena, InputStream textureStream) {
45         this.arena = arena;
46         BufferedImage img = null;
47         try {
48             img = ImageIO.read(textureStream);
49             this.width = img.getWidth();
50             this.height = img.getHeight();
51             BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_4BYTE_ABGR_PRE);
52             image.getGraphics().drawImage(img, 0, 0, null);
53             var raster = image.getRaster();
54             var dataBuffer = raster.getDataBuffer();
55             data = arena.allocateFrom(ValueLayout.JAVA_BYTE, ((DataBufferByte) dataBuffer).getData());
56         } catch (IOException e) {
57             throw new RuntimeException(e);
58         }
59     }
60 }