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

library / src / main / java / org / distorted / library / DistortedTexture.java @ 133cbb2b

1	4e2382f3	Leszek Koltunski	///////////////////////////////////////////////////////////////////////////////////////////////////
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			import android.graphics.Bitmap;
23			import android.graphics.Matrix;
24	194ab46f	Leszek Koltunski	import android.opengl.GLES30;
25	4e2382f3	Leszek Koltunski	import android.opengl.GLUtils;
26
27	1942537e	Leszek Koltunski	import java.util.Iterator;
28			import java.util.LinkedList;
29	4e2382f3	Leszek Koltunski
30			///////////////////////////////////////////////////////////////////////////////////////////////////
31	e0b6c593	Leszek Koltunski	/**
32			* Class which represents a OpenGL Texture object.
33			* <p>
34			* Create a Texture of arbitrary size and feed some pixels to it via the setTexture() method.
35			* <p>
36			* Keep all objects created in a static LinkedList. The point: we need to be able to mark
37			* Textures for deletion, and delete all marked objects later at a convenient time (that's
38			* because we can only delete from a thread that holds the OpenGL context so here we provide a
39			* framework where one is able to mark for deletion at any time and actual deletion takes place
40			* on the next render).
41			*/
42	133cbb2b	Leszek Koltunski	public class DistortedTexture extends DistortedRenderable
43	4e2382f3	Leszek Koltunski	{
44	1942537e	Leszek Koltunski	private static boolean mListMarked = false;
45			private static LinkedList<DistortedTexture> mList = new LinkedList<>();
46	4e2382f3	Leszek Koltunski
47	f8686932	Leszek Koltunski	private static int mTextureH;
48
49	1942537e	Leszek Koltunski	private boolean mMarked;
50	e7a20702	Leszek Koltunski	private Bitmap mBmp= null;
51	4e2382f3	Leszek Koltunski
52			///////////////////////////////////////////////////////////////////////////////////////////////////
53			// We have to flip vertically every single Bitmap that we get fed with.
54			//
55			// Reason: textures read from files are the only objects in OpenGL which have their origins at the
56			// upper-left corner. Everywhere else the origin is in the lower-left corner. Thus we have to flip.
57			// The alternative solution, namely inverting the y-coordinate of the TexCoord does not really work-
58			// i.e. it works only in case of rendering directly to the screen, but if we render to an FBO and
59	421c2728	Leszek Koltunski	// then take the FBO and render to screen, (DistortedTree does so!) things get inverted as textures
60	4e2382f3	Leszek Koltunski	// created from FBO have their origins in the lower-left... Mindfuck!
61
62			private static Bitmap flipBitmap(Bitmap src)
63			{
64			Matrix matrix = new Matrix();
65			matrix.preScale(1.0f,-1.0f);
66
67			return Bitmap.createBitmap(src,0,0,src.getWidth(),src.getHeight(), matrix,true);
68			}
69
70			///////////////////////////////////////////////////////////////////////////////////////////////////
71	1942537e	Leszek Koltunski	// must be called from a thread holding OpenGL Context
72	4e2382f3	Leszek Koltunski
73	133cbb2b	Leszek Koltunski	void create()
74	4e2382f3	Leszek Koltunski	{
75	133cbb2b	Leszek Koltunski	if( mBmp!=null && mColorH !=null )
76	4e2382f3	Leszek Koltunski	{
77	133cbb2b	Leszek Koltunski	if( mColorH[0]==0 )
78	05403bba	Leszek Koltunski	{
79	133cbb2b	Leszek Koltunski	GLES30.glGenTextures(1, mColorH, 0);
80			GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, mColorH[0]);
81	194ab46f	Leszek Koltunski	GLES30.glTexParameteri ( GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MIN_FILTER, GLES30.GL_LINEAR );
82			GLES30.glTexParameteri ( GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MAG_FILTER, GLES30.GL_LINEAR );
83			GLES30.glTexParameteri ( GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_WRAP_S, GLES30.GL_CLAMP_TO_EDGE );
84			GLES30.glTexParameteri ( GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_WRAP_T, GLES30.GL_CLAMP_TO_EDGE );
85			GLUtils.texImage2D(GLES30.GL_TEXTURE_2D, 0, flipBitmap(mBmp), 0);
86	05403bba	Leszek Koltunski	}
87			else
88			{
89	133cbb2b	Leszek Koltunski	GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, mColorH[0]);
90	194ab46f	Leszek Koltunski	GLUtils.texSubImage2D(GLES30.GL_TEXTURE_2D, 0,0,0,flipBitmap(mBmp));
91	05403bba	Leszek Koltunski	}
92	4e2382f3	Leszek Koltunski
93	e7a20702	Leszek Koltunski	mBmp = null;
94	4e2382f3	Leszek Koltunski	}
95			}
96
97			///////////////////////////////////////////////////////////////////////////////////////////////////
98	1942537e	Leszek Koltunski	// must be called from a thread holding OpenGL Context
99	4e2382f3	Leszek Koltunski
100	133cbb2b	Leszek Koltunski	private void delete()
101	4e2382f3	Leszek Koltunski	{
102	133cbb2b	Leszek Koltunski	if( mColorH !=null && mColorH[0]>0 )
103	1942537e	Leszek Koltunski	{
104	133cbb2b	Leszek Koltunski	GLES30.glDeleteTextures(1, mColorH, 0);
105			mColorH[0] = 0;
106	1942537e	Leszek Koltunski	}
107
108			mMarked = false;
109	4e2382f3	Leszek Koltunski	}
110
111	f8686932	Leszek Koltunski	///////////////////////////////////////////////////////////////////////////////////////////////////
112
113			static void getUniforms(int mProgramH)
114			{
115	194ab46f	Leszek Koltunski	mTextureH= GLES30.glGetUniformLocation( mProgramH, "u_Texture");
116	f8686932	Leszek Koltunski
117	194ab46f	Leszek Koltunski	GLES30.glActiveTexture(GLES30.GL_TEXTURE0);
118			GLES30.glUniform1i(mTextureH, 0);
119	f8686932	Leszek Koltunski	}
120
121	4e2382f3	Leszek Koltunski	///////////////////////////////////////////////////////////////////////////////////////////////////
122
123	7b8086eb	Leszek Koltunski	static synchronized void onDestroy()
124	4e2382f3	Leszek Koltunski	{
125	1942537e	Leszek Koltunski	mListMarked = false;
126			mList.clear();
127	4e2382f3	Leszek Koltunski	}
128
129			///////////////////////////////////////////////////////////////////////////////////////////////////
130	1942537e	Leszek Koltunski	// must be called form a thread holding OpenGL Context
131	4e2382f3	Leszek Koltunski
132	1942537e	Leszek Koltunski	static synchronized void deleteAllMarked()
133	4e2382f3	Leszek Koltunski	{
134	1942537e	Leszek Koltunski	if( mListMarked )
135	4e2382f3	Leszek Koltunski	{
136	1942537e	Leszek Koltunski	DistortedTexture tmp;
137			Iterator<DistortedTexture> iterator = mList.iterator();
138
139			while(iterator.hasNext())
140			{
141			tmp = iterator.next();
142
143			if( tmp.mMarked )
144			{
145	133cbb2b	Leszek Koltunski	tmp.delete();
146	1942537e	Leszek Koltunski	iterator.remove();
147			}
148			}
149	4e2382f3	Leszek Koltunski
150	1942537e	Leszek Koltunski	mListMarked = false;
151			}
152	4e2382f3	Leszek Koltunski	}
153
154			///////////////////////////////////////////////////////////////////////////////////////////////////
155			// PUBLIC API
156			///////////////////////////////////////////////////////////////////////////////////////////////////
157			/**
158			* Create empty texture of given dimensions.
159			*/
160	3ef3364d	Leszek Koltunski	public DistortedTexture(int width, int height)
161	4e2382f3	Leszek Koltunski	{
162	133cbb2b	Leszek Koltunski	mSizeX = width ;
163			mSizeY = height;
164			mColorH[0]= 0;
165			mBmp = null;
166			mMarked = false;
167	4e2382f3	Leszek Koltunski
168	1942537e	Leszek Koltunski	mList.add(this);
169	4e2382f3	Leszek Koltunski	}
170
171			///////////////////////////////////////////////////////////////////////////////////////////////////
172			/**
173	1942537e	Leszek Koltunski	* Mark the underlying OpenGL object for deletion. Actual deletion will take place on the next render.
174	4e2382f3	Leszek Koltunski	*/
175	1942537e	Leszek Koltunski	public void markForDeletion()
176	4e2382f3	Leszek Koltunski	{
177	1942537e	Leszek Koltunski	mListMarked = true;
178			mMarked = true;
179	4e2382f3	Leszek Koltunski	}
180
181			///////////////////////////////////////////////////////////////////////////////////////////////////
182			/**
183	1942537e	Leszek Koltunski	* Sets the underlying android.graphics.Bitmap object.
184	4e2382f3	Leszek Koltunski	* <p>
185			* You can only recycle() the passed Bitmap once the OpenGL context gets created (i.e. after call
186	432442f9	Leszek Koltunski	* to GLSurfaceView.onSurfaceCreated) because only after this point can the Library upload it to the GPU!
187	4e2382f3	Leszek Koltunski	*
188			* @param bmp The android.graphics.Bitmap object to apply effects to and display.
189			*/
190
191			public void setTexture(Bitmap bmp)
192			{
193	0c827acc	Leszek Koltunski	mBmp= bmp;
194	1942537e	Leszek Koltunski	}
195	4e2382f3	Leszek Koltunski	}

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library / src / main / java / org / distorted / library / DistortedTexture.java @ 133cbb2b