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

library / src / main / java / org / distorted / library / DistortedFramebuffer.java @ 05ecc6fe

1	f6fb3c6d	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	194ab46f	Leszek Koltunski	import android.opengl.GLES30;
23	f6fb3c6d	Leszek Koltunski
24			///////////////////////////////////////////////////////////////////////////////////////////////////
25	dedacd82	Leszek Koltunski	/**
26			* Class which represents a OpenGL Framebuffer object.
27	71c3fecc	Leszek Koltunski	* <p>
28	c5369f1b	leszek	* User is able to create offscreen FBOs and both a) render to them b) use their COLOR0 attachment as
29	2ed1c692	leszek	* an input texture. Attaching Depths and/or Stencils is also possible.
30	dedacd82	Leszek Koltunski	*/
31	af4cc5db	Leszek Koltunski	public class DistortedFramebuffer extends DistortedOutputSurface implements DistortedInputSurface
32	f6fb3c6d	Leszek Koltunski	{
33	bd3da5b2	Leszek Koltunski
34	f6fb3c6d	Leszek Koltunski	///////////////////////////////////////////////////////////////////////////////////////////////////
35	6537ba91	Leszek Koltunski	// Must be called from a thread holding OpenGL Context
36	227ac49a	Leszek Koltunski	// Watch out - this has the side-effect of binding a Texture and a Framebuffer!
37	f6fb3c6d	Leszek Koltunski
38	f8377ef8	leszek	void create()
39	f6fb3c6d	Leszek Koltunski	{
40	c7da4e65	leszek	if( mColorCreated==NOT_CREATED_YET )
41	7cf783cb	Leszek Koltunski	{
42	133cbb2b	Leszek Koltunski	GLES30.glGenTextures(1, mColorH, 0);
43			GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, mColorH[0]);
44	194ab46f	Leszek Koltunski	GLES30.glTexParameteri(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_WRAP_S, GLES30.GL_REPEAT);
45			GLES30.glTexParameteri(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_WRAP_T, GLES30.GL_REPEAT);
46			GLES30.glTexParameterf(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MIN_FILTER, GLES30.GL_NEAREST);
47			GLES30.glTexParameterf(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MAG_FILTER, GLES30.GL_LINEAR);
48	133cbb2b	Leszek Koltunski	GLES30.glTexImage2D(GLES30.GL_TEXTURE_2D, 0, GLES30.GL_RGBA, mSizeX, mSizeY, 0, GLES30.GL_RGBA, GLES30.GL_UNSIGNED_BYTE, null);
49	194ab46f	Leszek Koltunski
50	133cbb2b	Leszek Koltunski	GLES30.glGenFramebuffers(1, mFBOH, 0);
51			GLES30.glBindFramebuffer(GLES30.GL_FRAMEBUFFER, mFBOH[0]);
52			GLES30.glFramebufferTexture2D(GLES30.GL_FRAMEBUFFER, GLES30.GL_COLOR_ATTACHMENT0, GLES30.GL_TEXTURE_2D, mColorH[0], 0);
53	dedacd82	Leszek Koltunski
54	c7da4e65	leszek	mColorCreated = checkStatus("color");
55	7cf783cb	Leszek Koltunski	}
56	c7da4e65	leszek	if( mDepthCreated==NOT_CREATED_YET ) // we need to create a new DEPTH attachment
57	8c327653	Leszek Koltunski	{
58	133cbb2b	Leszek Koltunski	GLES30.glGenTextures(1, mDepthH, 0);
59			GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, mDepthH[0]);
60	194ab46f	Leszek Koltunski	GLES30.glTexParameteri(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_WRAP_S, GLES30.GL_REPEAT);
61			GLES30.glTexParameteri(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_WRAP_T, GLES30.GL_REPEAT);
62			GLES30.glTexParameteri(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MIN_FILTER, GLES30.GL_NEAREST);
63			GLES30.glTexParameteri(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MAG_FILTER, GLES30.GL_NEAREST);
64	133cbb2b	Leszek Koltunski	GLES30.glTexImage2D(GLES30.GL_TEXTURE_2D, 0, GLES30.GL_DEPTH_COMPONENT, mSizeX, mSizeY, 0, GLES30.GL_DEPTH_COMPONENT, GLES30.GL_UNSIGNED_SHORT, null);
65	8c327653	Leszek Koltunski
66	133cbb2b	Leszek Koltunski	GLES30.glBindFramebuffer(GLES30.GL_FRAMEBUFFER, mFBOH[0]);
67			GLES30.glFramebufferTexture2D(GLES30.GL_FRAMEBUFFER, GLES30.GL_DEPTH_ATTACHMENT, GLES30.GL_TEXTURE_2D, mDepthH[0], 0);
68	8c327653	Leszek Koltunski
69	c7da4e65	leszek	mDepthCreated = checkStatus("depth");
70	8c327653	Leszek Koltunski	}
71	c7da4e65	leszek	if( mDepthCreated==DONT_CREATE && mDepthH[0]>0 ) // we need to detach and recreate the DEPTH attachment.
72	8c327653	Leszek Koltunski	{
73	133cbb2b	Leszek Koltunski	GLES30.glDeleteTextures(1, mDepthH, 0);
74	c7da4e65	leszek	mDepthH[0]=0;
75	8c327653	Leszek Koltunski	}
76	8337fa41	Leszek Koltunski	}
77
78			///////////////////////////////////////////////////////////////////////////////////////////////////
79
80	c7da4e65	leszek	private int checkStatus(String message)
81	8337fa41	Leszek Koltunski	{
82	194ab46f	Leszek Koltunski	int status = GLES30.glCheckFramebufferStatus(GLES30.GL_FRAMEBUFFER);
83	8337fa41	Leszek Koltunski
84	194ab46f	Leszek Koltunski	if(status != GLES30.GL_FRAMEBUFFER_COMPLETE)
85	8337fa41	Leszek Koltunski	{
86			android.util.Log.e("DistortedFramebuffer", "FRAMEBUFFER INCOMPLETE, "+message+" error="+status);
87
88	133cbb2b	Leszek Koltunski	GLES30.glDeleteTextures(1, mColorH, 0);
89			GLES30.glDeleteTextures(1, mDepthH, 0);
90			GLES30.glDeleteFramebuffers(1, mFBOH, 0);
91	c7da4e65	leszek	mFBOH[0]= 0;
92	8337fa41	Leszek Koltunski
93	c7da4e65	leszek	return FAILED_TO_CREATE;
94	8337fa41	Leszek Koltunski	}
95	8c327653	Leszek Koltunski
96	c7da4e65	leszek	return CREATED;
97	f6fb3c6d	Leszek Koltunski	}
98
99			///////////////////////////////////////////////////////////////////////////////////////////////////
100	6537ba91	Leszek Koltunski	// Must be called from a thread holding OpenGL Context
101	f6fb3c6d	Leszek Koltunski
102	227ac49a	Leszek Koltunski	void delete()
103	f6fb3c6d	Leszek Koltunski	{
104	c7da4e65	leszek	if( mColorH[0]>0 )
105	e6cf7d50	Leszek Koltunski	{
106	c7da4e65	leszek	if( mDepthH[0]>0 )
107	8c327653	Leszek Koltunski	{
108	133cbb2b	Leszek Koltunski	GLES30.glDeleteTextures(1, mDepthH, 0);
109	c7da4e65	leszek	mDepthH[0]=0;
110			mDepthCreated = NOT_CREATED_YET;
111	8c327653	Leszek Koltunski	}
112
113	133cbb2b	Leszek Koltunski	GLES30.glDeleteTextures(1, mColorH, 0);
114	c7da4e65	leszek	mColorH[0] = 0;
115			mColorCreated = NOT_CREATED_YET;
116	bd3da5b2	Leszek Koltunski
117	133cbb2b	Leszek Koltunski	GLES30.glDeleteFramebuffers(1, mFBOH, 0);
118			mFBOH[0] = 0;
119	e6cf7d50	Leszek Koltunski	}
120	bd3da5b2	Leszek Koltunski	}
121
122	4ebbb17a	Leszek Koltunski	///////////////////////////////////////////////////////////////////////////////////////////////////
123			// called from onDestroy(); mark OpenGL assets as 'not created'
124
125	f8377ef8	leszek	void recreate()
126	4ebbb17a	Leszek Koltunski	{
127	05ecc6fe	Leszek Koltunski	if( mColorCreated!=DONT_CREATE )
128			{
129			mColorCreated = NOT_CREATED_YET;
130			mColorH[0] = 0;
131			}
132			if( mDepthCreated!=DONT_CREATE )
133			{
134			mDepthCreated = NOT_CREATED_YET;
135			mDepthH[0] = 0;
136			}
137	4ebbb17a	Leszek Koltunski	}
138
139	af27df87	leszek	///////////////////////////////////////////////////////////////////////////////////////////////////
140	09ab7524	Leszek Koltunski	// create SYSTEM or TREE framebuffers (those are just like normal FBOs, just hold information
141			// that they were autocreated only for the Library's internal purposes (SYSTEM) or for using
142			// inside a Tree of DistortedNodes (TREE)
143			// SYSTEM surfaces do not get removed in onDestroy().
144	af27df87	leszek
145	09ab7524	Leszek Koltunski	DistortedFramebuffer(boolean depthEnabled, int type, int width, int height)
146	af27df87	leszek	{
147	09ab7524	Leszek Koltunski	super(width,height,NOT_CREATED_YET, (depthEnabled ? NOT_CREATED_YET:DONT_CREATE),NOT_CREATED_YET, type);
148	af27df87	leszek	}
149
150	f2367b75	Leszek Koltunski	///////////////////////////////////////////////////////////////////////////////////////////////////
151			// For setting the Depth texture as input to fragment shaders that merge many planes. (currently: blur2)
152
153			boolean setAsDepth()
154			{
155			if( mDepthH[0]>0 )
156			{
157			GLES30.glActiveTexture(GLES30.GL_TEXTURE1);
158			GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, mDepthH[0]);
159			return true;
160			}
161
162			return false;
163			}
164
165	f6fb3c6d	Leszek Koltunski	///////////////////////////////////////////////////////////////////////////////////////////////////
166			// PUBLIC API
167	dedacd82	Leszek Koltunski	///////////////////////////////////////////////////////////////////////////////////////////////////
168	cdd5e827	Leszek Koltunski	/**
169			* Create a new offscreen Framebuffer.
170			*
171			* @param width Width of the COLOR attachment.
172			* @param height Height of the COLOR attachment.
173			* @param depthEnabled Add DEPTH attachment?
174			*/
175			@SuppressWarnings("unused")
176			public DistortedFramebuffer(int width, int height, boolean depthEnabled)
177			{
178	09ab7524	Leszek Koltunski	super(width,height,NOT_CREATED_YET,(depthEnabled ? NOT_CREATED_YET:DONT_CREATE),NOT_CREATED_YET,TYPE_USER);
179	cdd5e827	Leszek Koltunski	}
180
181	133cbb2b	Leszek Koltunski	///////////////////////////////////////////////////////////////////////////////////////////////////
182
183	dedacd82	Leszek Koltunski	/**
184	57578636	Leszek Koltunski	* Create a new offscreen Framebuffer.
185	dedacd82	Leszek Koltunski	*
186			* @param width Width of the COLOR attachment.
187			* @param height Height of the COLOR attachment.
188			*/
189	1942537e	Leszek Koltunski	@SuppressWarnings("unused")
190	ed13a5de	Leszek Koltunski	public DistortedFramebuffer(int width, int height)
191	f6fb3c6d	Leszek Koltunski	{
192	09ab7524	Leszek Koltunski	super(width,height,NOT_CREATED_YET,DONT_CREATE,NOT_CREATED_YET,TYPE_USER);
193	f6fb3c6d	Leszek Koltunski	}
194
195	b448e6b9	Leszek Koltunski	///////////////////////////////////////////////////////////////////////////////////////////////////
196	dedacd82	Leszek Koltunski	/**
197	c5369f1b	leszek	* Bind the underlying rectangle of pixels as a OpenGL Texture.
198	af4cc5db	Leszek Koltunski	*
199	a436ccc5	leszek	* @return <code>true</code> if successful.
200	dedacd82	Leszek Koltunski	*/
201	c5369f1b	leszek	public boolean setAsInput()
202	b448e6b9	Leszek Koltunski	{
203	c5369f1b	leszek	if( mColorH[0]>0 )
204			{
205	f2367b75	Leszek Koltunski	GLES30.glActiveTexture(GLES30.GL_TEXTURE0);
206	c5369f1b	leszek	GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, mColorH[0]);
207			return true;
208			}
209
210			return false;
211			}
212	2e49718d	Leszek Koltunski
213	d1e740c5	Leszek Koltunski	///////////////////////////////////////////////////////////////////////////////////////////////////
214			/**
215	09d4f4b1	Leszek Koltunski	* Return the ID of the Texture (COLOR attachment 0) that's backing this FBO.
216			* <p>
217			* Catch: this will only work if the library has had time to actually create the texture. Remember
218			* that the texture gets created only on first render, thus creating a Texture object and immediately
219			* calling this method will return an invalid (negative) result.
220			*
221	ab12f06b	Leszek Koltunski	* @return If there was not a single render between creation of the Object and calling this method on
222			* it, return a negative value. Otherwise, return ID of COLOR attachment 0.
223	d1e740c5	Leszek Koltunski	*/
224	09d4f4b1	Leszek Koltunski	public int getTextureID()
225	d1e740c5	Leszek Koltunski	{
226	133cbb2b	Leszek Koltunski	return mColorH[0];
227	8c327653	Leszek Koltunski	}
228	f6fb3c6d	Leszek Koltunski	}

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library / src / main / java / org / distorted / library / DistortedFramebuffer.java @ 05ecc6fe