/src/main/java/org/distorted/library/DistortedSurface.java - Annotate - Distorted Android

library / src / main / java / org / distorted / library / DistortedSurface.java @ f8377ef8

1	c5369f1b	leszek	///////////////////////////////////////////////////////////////////////////////////////////////////
2			// Copyright 2016 Leszek Koltunski //
3			// //
4			// This file is part of Distorted. //
5			// //
6			// Distorted is free software: you can redistribute it and/or modify //
7			// it under the terms of the GNU General Public License as published by //
8			// the Free Software Foundation, either version 2 of the License, or //
9			// (at your option) any later version. //
10			// //
11			// Distorted is distributed in the hope that it will be useful, //
12			// but WITHOUT ANY WARRANTY; without even the implied warranty of //
13			// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
14			// GNU General Public License for more details. //
15			// //
16			// You should have received a copy of the GNU General Public License //
17			// along with Distorted. If not, see <http://www.gnu.org/licenses/>. //
18			///////////////////////////////////////////////////////////////////////////////////////////////////
19
20			package org.distorted.library;
21
22	af4cc5db	Leszek Koltunski	import java.util.LinkedList;
23
24			///////////////////////////////////////////////////////////////////////////////////////////////////
25			/**
26			* Keep all objects created in a static LinkedList. The point: we need to be able to mark
27			* Objects for deletion, and delete all marked Objects later at a convenient time (that's
28			* because we can only delete from a thread that holds the OpenGL context so here we provide a
29			* framework where one is able to mark for deletion at any time and actual deletion takes place
30			* on the next render).
31			*/
32			abstract class DistortedSurface
33			{
34			static final int FAILED_TO_CREATE = -1;
35			static final int NOT_CREATED_YET = -2;
36			static final int DONT_CREATE = -3;
37
38	f8377ef8	leszek	private static boolean mToDo = false;
39			private static LinkedList<DistortedSurface> mDoneList = new LinkedList<>();
40			private static LinkedList<DistortedSurface> mToDoList = new LinkedList<>();
41	af4cc5db	Leszek Koltunski
42			private boolean mMarked;
43			int[] mColorH = new int[1];
44			int mSizeX, mSizeY; // in screen space
45
46			///////////////////////////////////////////////////////////////////////////////////////////////////
47
48	f8377ef8	leszek	abstract void create();
49	af4cc5db	Leszek Koltunski	abstract void delete();
50	f8377ef8	leszek	abstract void recreate();
51	af4cc5db	Leszek Koltunski
52			///////////////////////////////////////////////////////////////////////////////////////////////////
53			// must be called form a thread holding OpenGL Context
54
55	f8377ef8	leszek	static synchronized void toDo()
56	af4cc5db	Leszek Koltunski	{
57	f8377ef8	leszek	if( mToDo )
58	af4cc5db	Leszek Koltunski	{
59	f8377ef8	leszek	DistortedSurface surface;
60	af4cc5db	Leszek Koltunski
61	f8377ef8	leszek	int num = mToDoList.size();
62
63			for(int i=0; i<num; i++)
64	af4cc5db	Leszek Koltunski	{
65	f8377ef8	leszek	surface = mToDoList.removeFirst();
66	af4cc5db	Leszek Koltunski
67	f8377ef8	leszek	if(surface.mMarked)
68			{
69			surface.delete();
70			surface.mMarked = false;
71			}
72			else
73	af4cc5db	Leszek Koltunski	{
74	f8377ef8	leszek	surface.create();
75			mDoneList.add(surface);
76	af4cc5db	Leszek Koltunski	}
77			}
78
79	f8377ef8	leszek	mToDo = false;
80	af4cc5db	Leszek Koltunski	}
81			}
82
83	c5369f1b	leszek	///////////////////////////////////////////////////////////////////////////////////////////////////
84
85	af4cc5db	Leszek Koltunski	static synchronized void onDestroy()
86			{
87	f8377ef8	leszek	DistortedSurface surface;
88
89			int num = mDoneList.size();
90
91			for(int i=0; i<num; i++)
92	af4cc5db	Leszek Koltunski	{
93	f8377ef8	leszek	surface = mDoneList.removeFirst();
94
95			if( !surface.mMarked )
96			{
97			surface.recreate();
98			mToDoList.add(surface);
99			}
100	af4cc5db	Leszek Koltunski	}
101
102	f8377ef8	leszek	mToDo = true;
103			}
104
105			///////////////////////////////////////////////////////////////////////////////////////////////////
106
107			synchronized void moveToToDo()
108			{
109			if ( mDoneList.remove(this) )
110			{
111			mToDoList.add(this);
112			mToDo = true;
113			}
114	af4cc5db	Leszek Koltunski	}
115
116			///////////////////////////////////////////////////////////////////////////////////////////////////
117
118			DistortedSurface(int width, int height, int color)
119			{
120			mSizeX = width ;
121			mSizeY = height;
122			mColorH[0]= color;
123			mMarked = false;
124	f8377ef8	leszek
125			if( color!=DONT_CREATE )
126			{
127			mToDoList.add(this);
128			mToDo = true;
129			}
130	af4cc5db	Leszek Koltunski	}
131
132			///////////////////////////////////////////////////////////////////////////////////////////////////
133			// PUBLIC API
134			///////////////////////////////////////////////////////////////////////////////////////////////////
135	c5369f1b	leszek	/**
136	af4cc5db	Leszek Koltunski	* Mark the underlying OpenGL object for deletion. Actual deletion will take place on the next render.
137	c5369f1b	leszek	*/
138	af4cc5db	Leszek Koltunski	public void markForDeletion()
139			{
140	f8377ef8	leszek	if( !mMarked )
141			{
142			mToDo = true;
143			mMarked = true;
144			mDoneList.remove(this);
145			mToDoList.add(this);
146			}
147	af4cc5db	Leszek Koltunski	}
148	c5369f1b	leszek
149	af4cc5db	Leszek Koltunski	////////////////////////////////////////////////////////////////////////////////////////////////////
150	c5369f1b	leszek	/**
151	af4cc5db	Leszek Koltunski	* Return unique ID of the Surface.
152	c5369f1b	leszek	*/
153	af4cc5db	Leszek Koltunski	public long getID()
154			{
155			return mColorH[0];
156			}
157
158			///////////////////////////////////////////////////////////////////////////////////////////////////
159
160	c5369f1b	leszek	/**
161	af4cc5db	Leszek Koltunski	* Returns the height of the Surface.
162			*
163			* @return height of the object, in pixels.
164	c5369f1b	leszek	*/
165	af4cc5db	Leszek Koltunski	public int getWidth()
166			{
167			return mSizeX;
168			}
169
170			///////////////////////////////////////////////////////////////////////////////////////////////////
171	c5369f1b	leszek	/**
172	af4cc5db	Leszek Koltunski	* Returns the width of the Surface.
173			*
174			* @return width of the Object, in pixels.
175	c5369f1b	leszek	*/
176	af4cc5db	Leszek Koltunski	public int getHeight()
177			{
178			return mSizeY;
179			}
180
181			///////////////////////////////////////////////////////////////////////////////////////////////////
182	c5369f1b	leszek	/**
183	af4cc5db	Leszek Koltunski	* Returns the depth of the Surface.
184			* <p>
185			* Admittedly quite a strange method. Why do we need to pass a Mesh to it? Because one cannot determine
186			* 'depth' of a Surface (bitmap really!) when rendered based only on the texture itself, that depends
187			* on the Mesh it is rendered with.
188			*
189			* @return depth of the Object, in pixels.
190	c5369f1b	leszek	*/
191	af4cc5db	Leszek Koltunski	public int getDepth(MeshObject mesh)
192			{
193			return mesh==null ? 0 : (int)(mSizeX*mesh.zFactor);
194			}
195			}

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library / src / main / java / org / distorted / library / DistortedSurface.java @ f8377ef8