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source: GTP/trunk/App/Demos/Vis/FriendlyCulling/src/FrameBufferObject.cpp @ 2861

Revision 2861, 5.1 KB checked in by mattausch, 16 years ago (diff)
cleaned up code

Line
1	#include <iostream>
2	#include "FrameBufferObject.h"
3	#include "glInterface.h"
4
5	using namespace std;
6
7
8	namespace CHCDemoEngine
9	{
10
11	GLenum color_attachment[] = {GL_COLOR_ATTACHMENT0_EXT, GL_COLOR_ATTACHMENT1_EXT, GL_COLOR_ATTACHMENT2_EXT, GL_COLOR_ATTACHMENT3_EXT};
12
13	void PrintFBOStatus(GLenum status)
14	{
15	switch(status)
16	{
17	case GL_FRAMEBUFFER_COMPLETE_EXT:
18	cout << "frame buffer object complete" << endl;
19	break;
20	case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT:
21	cerr << "incomplete attachment" << endl;
22	break;
23	case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT:
24	cerr << "missing attachment" << endl;
25	break;
26	case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT:
27	cerr << "incomplete dimensions" << endl;
28	break;
29	case GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT:
30	cerr << "incomplete formats" << endl;
31	break;
32	case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT:
33	cerr << "incomplete draw buffer" << endl;
34	break;
35	case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT:
36	cerr << "incomplete read buffer" << endl;
37	break;
38	case GL_FRAMEBUFFER_UNSUPPORTED_EXT:
39	cerr << "framebuffer unsupported" << endl;
40	break;
41	default:
42	cerr << "unknown status code " << status << endl;
43	}
44	}
45
46
47	ColorBufferObject::ColorBufferObject(int w, int h,
48	FORMAT format,
49	WRAP_TYPE wrapType,
50	FILTER_TYPE filterType,
51	bool useMipMap,
52	bool useMultiSampling,
53	int attachment_idx)
54	{
55	GLuint glformat, internalFormat;
56
57
58	switch (format)
59	{
60	case BUFFER_UBYTE:
61	glformat = GL_UNSIGNED_BYTE; internalFormat = GL_RGBA8; break;
62	case BUFFER_FLOAT_16:
63	glformat = GL_FLOAT; internalFormat = GL_RGBA16F_ARB; break;
64	case BUFFER_FLOAT_32:
65	glformat = GL_FLOAT; internalFormat = GL_RGBA32F_ARB; break;
66	default:
67	glformat = GL_UNSIGNED_BYTE; internalFormat = GL_RGBA8;
68	cerr << "should not come here" << endl;
69	}
70
71	glGenRenderbuffersEXT(1, &mId);
72	glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, mId);
73	glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, internalFormat, w, h);
74
75	glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, color_attachment[attachment_idx], GL_RENDERBUFFER_EXT, mId);
76
77	glGenTextures(1, &mTexId);
78	glBindTexture(GL_TEXTURE_2D, mTexId);
79	//glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, w, h, 0, GL_RGBA, glformat, NULL);
80	glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, w, h, 0, GL_RGBA, glformat, NULL);
81	glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, color_attachment[attachment_idx], GL_TEXTURE_2D, mTexId, 0);
82
83	GLuint filterParam;
84
85	switch (filterType)
86	{
87	case FILTER_NEAREST:
88	filterParam = GL_NEAREST; break;
89	case FILTER_LINEAR:
90	filterParam = GL_LINEAR; break;
91	case FILTER_MIPMAP_LINEAR:
92	filterParam = GL_LINEAR_MIPMAP_LINEAR; break;
93	default:
94	filterParam = GL_NEAREST;
95	cerr << "should not come here" << endl;
96	}
97
98
99	GLuint wrapParam;
100
101	switch (wrapType)
102	{
103	case WRAP_REPEAT:
104	wrapParam = GL_REPEAT; break;
105	case WRAP_CLAMP_TO_EDGE:
106	wrapParam = GL_CLAMP_TO_EDGE; break;
107	}
108
109	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filterParam);
110	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filterParam);
111
112	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrapParam);
113	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrapParam);
114
115	// print status
116	PrintFBOStatus(glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT));
117	}
118
119
120	FrameBufferObject::FrameBufferObject(int w, int h, DEPTH_FORMAT d)
121	: mWidth(w), mHeight(h)
122	{
123	glGenFramebuffersEXT(1, &mId);
124	glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mId);
125
126	cout << "creating fbo" << endl;
127
128	///////////
129	//-- create depth buffer
130
131	if (d != DEPTH_NONE)
132	{
133	glGenRenderbuffersEXT(1, &mDepthId);
134	glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, mDepthId);
135
136	cout << "adding depth buffer" << endl;
137
138	GLuint depthFormat;
139
140	switch (d)
141	{
142	case DEPTH_16:
143	depthFormat = GL_DEPTH_COMPONENT16; break;
144	case DEPTH_24:
145	depthFormat = GL_DEPTH_COMPONENT24; break;
146	case DEPTH_32:
147	depthFormat = GL_DEPTH_COMPONENT32; break;
148	default:
149	cerr << "should not come here" << endl;
150	}
151
152	glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, depthFormat, mWidth, mHeight);
153	glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, mDepthId);
154	}
155	}
156
157
158	int FrameBufferObject::AddColorBuffer(ColorBufferObject::FORMAT col,
159	ColorBufferObject::WRAP_TYPE wrapType,
160	ColorBufferObject::FILTER_TYPE filterType,
161	bool useMipMap,
162	bool useMultiSampling)
163	{
164	cout << "adding color buffer" << endl;
165
166	glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mId);
167
168	int idx = (int)mColorBuffers.size();
169	ColorBufferObject *colorBuf =
170	new ColorBufferObject(mWidth, mHeight, col, wrapType, filterType, useMipMap, useMultiSampling, idx);
171
172	mColorBuffers.push_back(colorBuf);
173
174	glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
175
176	return idx;
177	}
178
179
180	void FrameBufferObject::Bind() const
181	{
182	glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mId);
183	}
184
185
186	void FrameBufferObject::Release()
187	{
188	glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
189	}
190
191
192	} // namespace

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