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

library / src / main / java / org / distorted / library / DistortedFramebuffer.java @ b9798977

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	b9798977	leszek	///////////////////////////////////////////////////////////////////////////////////////////////////
35
36			DistortedFramebuffer getBuffer()
37			{
38			return this;
39			}
40
41	f6fb3c6d	Leszek Koltunski	///////////////////////////////////////////////////////////////////////////////////////////////////
42	6537ba91	Leszek Koltunski	// Must be called from a thread holding OpenGL Context
43	227ac49a	Leszek Koltunski	// Watch out - this has the side-effect of binding a Texture and a Framebuffer!
44	f6fb3c6d	Leszek Koltunski
45	f8377ef8	leszek	void create()
46	f6fb3c6d	Leszek Koltunski	{
47	c7da4e65	leszek	if( mColorCreated==NOT_CREATED_YET )
48	7cf783cb	Leszek Koltunski	{
49	133cbb2b	Leszek Koltunski	GLES30.glGenTextures(1, mColorH, 0);
50			GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, mColorH[0]);
51	194ab46f	Leszek Koltunski	GLES30.glTexParameteri(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_WRAP_S, GLES30.GL_REPEAT);
52			GLES30.glTexParameteri(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_WRAP_T, GLES30.GL_REPEAT);
53			GLES30.glTexParameterf(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MIN_FILTER, GLES30.GL_NEAREST);
54			GLES30.glTexParameterf(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MAG_FILTER, GLES30.GL_LINEAR);
55	133cbb2b	Leszek Koltunski	GLES30.glTexImage2D(GLES30.GL_TEXTURE_2D, 0, GLES30.GL_RGBA, mSizeX, mSizeY, 0, GLES30.GL_RGBA, GLES30.GL_UNSIGNED_BYTE, null);
56	194ab46f	Leszek Koltunski
57	133cbb2b	Leszek Koltunski	GLES30.glGenFramebuffers(1, mFBOH, 0);
58			GLES30.glBindFramebuffer(GLES30.GL_FRAMEBUFFER, mFBOH[0]);
59			GLES30.glFramebufferTexture2D(GLES30.GL_FRAMEBUFFER, GLES30.GL_COLOR_ATTACHMENT0, GLES30.GL_TEXTURE_2D, mColorH[0], 0);
60	dedacd82	Leszek Koltunski
61	c7da4e65	leszek	mColorCreated = checkStatus("color");
62	7cf783cb	Leszek Koltunski	}
63	c7da4e65	leszek	if( mDepthCreated==NOT_CREATED_YET ) // we need to create a new DEPTH attachment
64	8c327653	Leszek Koltunski	{
65	133cbb2b	Leszek Koltunski	GLES30.glGenTextures(1, mDepthH, 0);
66			GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, mDepthH[0]);
67	194ab46f	Leszek Koltunski	GLES30.glTexParameteri(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_WRAP_S, GLES30.GL_REPEAT);
68			GLES30.glTexParameteri(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_WRAP_T, GLES30.GL_REPEAT);
69			GLES30.glTexParameteri(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MIN_FILTER, GLES30.GL_NEAREST);
70			GLES30.glTexParameteri(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MAG_FILTER, GLES30.GL_NEAREST);
71	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);
72	8c327653	Leszek Koltunski
73	133cbb2b	Leszek Koltunski	GLES30.glBindFramebuffer(GLES30.GL_FRAMEBUFFER, mFBOH[0]);
74			GLES30.glFramebufferTexture2D(GLES30.GL_FRAMEBUFFER, GLES30.GL_DEPTH_ATTACHMENT, GLES30.GL_TEXTURE_2D, mDepthH[0], 0);
75	8c327653	Leszek Koltunski
76	c7da4e65	leszek	mDepthCreated = checkStatus("depth");
77	8c327653	Leszek Koltunski	}
78	c7da4e65	leszek	if( mDepthCreated==DONT_CREATE && mDepthH[0]>0 ) // we need to detach and recreate the DEPTH attachment.
79	8c327653	Leszek Koltunski	{
80	133cbb2b	Leszek Koltunski	GLES30.glDeleteTextures(1, mDepthH, 0);
81	c7da4e65	leszek	mDepthH[0]=0;
82	8c327653	Leszek Koltunski	}
83	8337fa41	Leszek Koltunski	}
84
85			///////////////////////////////////////////////////////////////////////////////////////////////////
86
87	c7da4e65	leszek	private int checkStatus(String message)
88	8337fa41	Leszek Koltunski	{
89	194ab46f	Leszek Koltunski	int status = GLES30.glCheckFramebufferStatus(GLES30.GL_FRAMEBUFFER);
90	8337fa41	Leszek Koltunski
91	194ab46f	Leszek Koltunski	if(status != GLES30.GL_FRAMEBUFFER_COMPLETE)
92	8337fa41	Leszek Koltunski	{
93			android.util.Log.e("DistortedFramebuffer", "FRAMEBUFFER INCOMPLETE, "+message+" error="+status);
94
95	133cbb2b	Leszek Koltunski	GLES30.glDeleteTextures(1, mColorH, 0);
96			GLES30.glDeleteTextures(1, mDepthH, 0);
97			GLES30.glDeleteFramebuffers(1, mFBOH, 0);
98	c7da4e65	leszek	mFBOH[0]= 0;
99	8337fa41	Leszek Koltunski
100	c7da4e65	leszek	return FAILED_TO_CREATE;
101	8337fa41	Leszek Koltunski	}
102	8c327653	Leszek Koltunski
103	c7da4e65	leszek	return CREATED;
104	f6fb3c6d	Leszek Koltunski	}
105
106			///////////////////////////////////////////////////////////////////////////////////////////////////
107	6537ba91	Leszek Koltunski	// Must be called from a thread holding OpenGL Context
108	f6fb3c6d	Leszek Koltunski
109	227ac49a	Leszek Koltunski	void delete()
110	f6fb3c6d	Leszek Koltunski	{
111	c7da4e65	leszek	if( mColorH[0]>0 )
112	e6cf7d50	Leszek Koltunski	{
113	c7da4e65	leszek	if( mDepthH[0]>0 )
114	8c327653	Leszek Koltunski	{
115	133cbb2b	Leszek Koltunski	GLES30.glDeleteTextures(1, mDepthH, 0);
116	c7da4e65	leszek	mDepthH[0]=0;
117			mDepthCreated = NOT_CREATED_YET;
118	8c327653	Leszek Koltunski	}
119
120	133cbb2b	Leszek Koltunski	GLES30.glDeleteTextures(1, mColorH, 0);
121	c7da4e65	leszek	mColorH[0] = 0;
122			mColorCreated = NOT_CREATED_YET;
123	bd3da5b2	Leszek Koltunski
124	133cbb2b	Leszek Koltunski	GLES30.glDeleteFramebuffers(1, mFBOH, 0);
125			mFBOH[0] = 0;
126	e6cf7d50	Leszek Koltunski	}
127	bd3da5b2	Leszek Koltunski	}
128
129	4ebbb17a	Leszek Koltunski	///////////////////////////////////////////////////////////////////////////////////////////////////
130			// called from onDestroy(); mark OpenGL assets as 'not created'
131
132	f8377ef8	leszek	void recreate()
133	4ebbb17a	Leszek Koltunski	{
134	c7da4e65	leszek	if( mColorCreated!=DONT_CREATE ) mColorCreated = NOT_CREATED_YET;
135			if( mDepthCreated!=DONT_CREATE ) mDepthCreated = NOT_CREATED_YET;
136	4ebbb17a	Leszek Koltunski	}
137
138	86eb00a9	Leszek Koltunski	///////////////////////////////////////////////////////////////////////////////////////////////////
139			// if new size fits into the size of the underlying Texture, just change the projection without
140			// reallocating the Texture. Otherwise, we need to reallocate.
141			//
142	af4cc5db	Leszek Koltunski	// Must be called from a thread holding the OpenGL context.
143	86eb00a9	Leszek Koltunski
144			void resizeFast(int width, int height)
145			{
146	af4cc5db	Leszek Koltunski	if( mWidth!=width \|\| mHeight!=height )
147	86eb00a9	Leszek Koltunski	{
148	af4cc5db	Leszek Koltunski	mWidth = width;
149			mHeight= height;
150			createProjection();
151
152	c5369f1b	leszek	if( width> mSizeX \|\| height> mSizeY)
153	86eb00a9	Leszek Koltunski	{
154	c5369f1b	leszek	mSizeX = width;
155			mSizeY = height;
156	133cbb2b	Leszek Koltunski	delete();
157	86eb00a9	Leszek Koltunski	}
158			}
159	cc0734e7	Leszek Koltunski
160	133cbb2b	Leszek Koltunski	create();
161	86eb00a9	Leszek Koltunski	}
162
163	af27df87	leszek	///////////////////////////////////////////////////////////////////////////////////////////////////
164	09ab7524	Leszek Koltunski	// create SYSTEM or TREE framebuffers (those are just like normal FBOs, just hold information
165			// that they were autocreated only for the Library's internal purposes (SYSTEM) or for using
166			// inside a Tree of DistortedNodes (TREE)
167			// SYSTEM surfaces do not get removed in onDestroy().
168	af27df87	leszek
169	09ab7524	Leszek Koltunski	DistortedFramebuffer(boolean depthEnabled, int type, int width, int height)
170	af27df87	leszek	{
171	09ab7524	Leszek Koltunski	super(width,height,NOT_CREATED_YET, (depthEnabled ? NOT_CREATED_YET:DONT_CREATE),NOT_CREATED_YET, type);
172	af27df87	leszek	}
173
174	f6fb3c6d	Leszek Koltunski	///////////////////////////////////////////////////////////////////////////////////////////////////
175			// PUBLIC API
176	dedacd82	Leszek Koltunski	///////////////////////////////////////////////////////////////////////////////////////////////////
177	cdd5e827	Leszek Koltunski	/**
178			* Create a new offscreen Framebuffer.
179			*
180			* @param width Width of the COLOR attachment.
181			* @param height Height of the COLOR attachment.
182			* @param depthEnabled Add DEPTH attachment?
183			*/
184			@SuppressWarnings("unused")
185			public DistortedFramebuffer(int width, int height, boolean depthEnabled)
186			{
187	09ab7524	Leszek Koltunski	super(width,height,NOT_CREATED_YET,(depthEnabled ? NOT_CREATED_YET:DONT_CREATE),NOT_CREATED_YET,TYPE_USER);
188	cdd5e827	Leszek Koltunski	}
189
190	133cbb2b	Leszek Koltunski	///////////////////////////////////////////////////////////////////////////////////////////////////
191
192	dedacd82	Leszek Koltunski	/**
193	57578636	Leszek Koltunski	* Create a new offscreen Framebuffer.
194	dedacd82	Leszek Koltunski	*
195			* @param width Width of the COLOR attachment.
196			* @param height Height of the COLOR attachment.
197			*/
198	1942537e	Leszek Koltunski	@SuppressWarnings("unused")
199	ed13a5de	Leszek Koltunski	public DistortedFramebuffer(int width, int height)
200	f6fb3c6d	Leszek Koltunski	{
201	09ab7524	Leszek Koltunski	super(width,height,NOT_CREATED_YET,DONT_CREATE,NOT_CREATED_YET,TYPE_USER);
202	f6fb3c6d	Leszek Koltunski	}
203
204	b448e6b9	Leszek Koltunski	///////////////////////////////////////////////////////////////////////////////////////////////////
205	dedacd82	Leszek Koltunski	/**
206	c5369f1b	leszek	* Bind the underlying rectangle of pixels as a OpenGL Texture.
207	af4cc5db	Leszek Koltunski	*
208	a436ccc5	leszek	* @return <code>true</code> if successful.
209	dedacd82	Leszek Koltunski	*/
210	c5369f1b	leszek	public boolean setAsInput()
211	b448e6b9	Leszek Koltunski	{
212	c5369f1b	leszek	if( mColorH[0]>0 )
213			{
214			GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, mColorH[0]);
215			return true;
216			}
217
218			return false;
219			}
220	2e49718d	Leszek Koltunski
221	d1e740c5	Leszek Koltunski	///////////////////////////////////////////////////////////////////////////////////////////////////
222			/**
223	09d4f4b1	Leszek Koltunski	* Return the ID of the Texture (COLOR attachment 0) that's backing this FBO.
224			* <p>
225			* Catch: this will only work if the library has had time to actually create the texture. Remember
226			* that the texture gets created only on first render, thus creating a Texture object and immediately
227			* calling this method will return an invalid (negative) result.
228			*
229	ab12f06b	Leszek Koltunski	* @return If there was not a single render between creation of the Object and calling this method on
230			* it, return a negative value. Otherwise, return ID of COLOR attachment 0.
231	d1e740c5	Leszek Koltunski	*/
232	09d4f4b1	Leszek Koltunski	public int getTextureID()
233	d1e740c5	Leszek Koltunski	{
234	133cbb2b	Leszek Koltunski	return mColorH[0];
235	8c327653	Leszek Koltunski	}
236	f6fb3c6d	Leszek Koltunski	}

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library / src / main / java / org / distorted / library / DistortedFramebuffer.java @ b9798977