[2855] | 1 | #include <iostream>
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| 2 | #include "FrameBufferObject.h"
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| 3 | #include "glInterface.h"
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| 4 |
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| 5 | using namespace std;
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| 6 |
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| 7 |
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| 8 | namespace CHCDemoEngine
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| 9 | {
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| 10 |
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[2861] | 11 | GLenum color_attachment[] = {GL_COLOR_ATTACHMENT0_EXT, GL_COLOR_ATTACHMENT1_EXT, GL_COLOR_ATTACHMENT2_EXT, GL_COLOR_ATTACHMENT3_EXT};
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[2855] | 12 |
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| 13 | void PrintFBOStatus(GLenum status)
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| 14 | {
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| 15 | switch(status)
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| 16 | {
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| 17 | case GL_FRAMEBUFFER_COMPLETE_EXT:
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[2879] | 18 | //cout << "frame buffer object complete" << endl;
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[2855] | 19 | break;
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| 20 | case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT:
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| 21 | cerr << "incomplete attachment" << endl;
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| 22 | break;
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| 23 | case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT:
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| 24 | cerr << "missing attachment" << endl;
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| 25 | break;
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| 26 | case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT:
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| 27 | cerr << "incomplete dimensions" << endl;
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| 28 | break;
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| 29 | case GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT:
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| 30 | cerr << "incomplete formats" << endl;
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| 31 | break;
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| 32 | case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT:
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| 33 | cerr << "incomplete draw buffer" << endl;
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| 34 | break;
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| 35 | case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT:
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| 36 | cerr << "incomplete read buffer" << endl;
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| 37 | break;
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| 38 | case GL_FRAMEBUFFER_UNSUPPORTED_EXT:
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| 39 | cerr << "framebuffer unsupported" << endl;
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| 40 | break;
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| 41 | default:
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| 42 | cerr << "unknown status code " << status << endl;
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| 43 | }
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| 44 | }
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| 45 |
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| 46 |
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| 47 | ColorBufferObject::ColorBufferObject(int w, int h,
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[2861] | 48 | FORMAT format,
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[2856] | 49 | WRAP_TYPE wrapType,
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| 50 | FILTER_TYPE filterType,
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[2855] | 51 | bool useMipMap,
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[2861] | 52 | int attachment_idx)
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[2855] | 53 | {
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[2861] | 54 | GLuint glformat, internalFormat;
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| 55 |
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| 56 |
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| 57 | switch (format)
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| 58 | {
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| 59 | case BUFFER_UBYTE:
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| 60 | glformat = GL_UNSIGNED_BYTE; internalFormat = GL_RGBA8; break;
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| 61 | case BUFFER_FLOAT_16:
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| 62 | glformat = GL_FLOAT; internalFormat = GL_RGBA16F_ARB; break;
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| 63 | case BUFFER_FLOAT_32:
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| 64 | glformat = GL_FLOAT; internalFormat = GL_RGBA32F_ARB; break;
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| 65 | default:
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| 66 | glformat = GL_UNSIGNED_BYTE; internalFormat = GL_RGBA8;
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| 67 | cerr << "should not come here" << endl;
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| 68 | }
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| 69 |
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[2879] | 70 |
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[2856] | 71 | glGenRenderbuffersEXT(1, &mId);
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| 72 | glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, mId);
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[2855] | 73 |
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[2879] | 74 | glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, internalFormat, w, h);
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[2861] | 75 | glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, color_attachment[attachment_idx], GL_RENDERBUFFER_EXT, mId);
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[2855] | 76 |
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[2879] | 77 |
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[2856] | 78 | glGenTextures(1, &mTexId);
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| 79 | glBindTexture(GL_TEXTURE_2D, mTexId);
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[2861] | 80 | glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, w, h, 0, GL_RGBA, glformat, NULL);
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[2862] | 81 |
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[2861] | 82 | glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, color_attachment[attachment_idx], GL_TEXTURE_2D, mTexId, 0);
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[2855] | 83 |
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[2867] | 84 | GLuint minfilterParam;
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| 85 | GLuint magfilterParam;
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[2855] | 86 |
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[2856] | 87 | switch (filterType)
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| 88 | {
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[2857] | 89 | case FILTER_NEAREST:
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[2867] | 90 | minfilterParam = GL_NEAREST;
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| 91 | magfilterParam = GL_NEAREST; break;
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[2857] | 92 | case FILTER_LINEAR:
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[2867] | 93 | minfilterParam = GL_LINEAR;
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| 94 | magfilterParam = GL_LINEAR; break;
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[2857] | 95 | case FILTER_MIPMAP_LINEAR:
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[2884] | 96 | minfilterParam = GL_NEAREST_MIPMAP_NEAREST;
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| 97 | magfilterParam = GL_NEAREST;
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[2881] | 98 |
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[2884] | 99 | //minfilterParam = GL_LINEAR_MIPMAP_NEAREST;
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| 100 | //magfilterParam = GL_LINEAR;
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[2881] | 101 | break;
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[2861] | 102 | default:
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[2867] | 103 | minfilterParam = GL_NEAREST;
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| 104 | magfilterParam = GL_NEAREST;
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| 105 |
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[2861] | 106 | cerr << "should not come here" << endl;
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[2856] | 107 | }
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[2855] | 108 |
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[2856] | 109 |
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| 110 | GLuint wrapParam;
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| 111 |
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| 112 | switch (wrapType)
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| 113 | {
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[2857] | 114 | case WRAP_REPEAT:
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| 115 | wrapParam = GL_REPEAT; break;
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| 116 | case WRAP_CLAMP_TO_EDGE:
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| 117 | wrapParam = GL_CLAMP_TO_EDGE; break;
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[2856] | 118 | }
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| 119 |
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[2867] | 120 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, magfilterParam);
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| 121 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, minfilterParam);
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[2856] | 122 |
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| 123 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrapParam);
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| 124 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrapParam);
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| 125 |
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[2867] | 126 | if (useMipMap) glGenerateMipmapEXT(GL_TEXTURE_2D);
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| 127 |
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[2857] | 128 | // print status
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[2855] | 129 | PrintFBOStatus(glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT));
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| 130 | }
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| 131 |
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| 132 |
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[2878] | 133 | ColorBufferObject::~ColorBufferObject()
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| 134 | {
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| 135 | glDeleteRenderbuffersEXT(1, &mId);
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| 136 | glDeleteTextures(1, &mTexId);
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| 137 | }
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| 138 |
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| 139 |
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[2862] | 140 | FrameBufferObject::FrameBufferObject(int w, int h, DEPTH_FORMAT d, bool useDepthTex)
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| 141 | : mWidth(w), mHeight(h), mDepthTexId(0)
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[2855] | 142 | {
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| 143 | glGenFramebuffersEXT(1, &mId);
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[2862] | 144 |
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| 145 | Bind();
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[2855] | 146 |
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| 147 | ///////////
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| 148 | //-- create depth buffer
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| 149 |
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[2861] | 150 | if (d != DEPTH_NONE)
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[2855] | 151 | {
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| 152 | glGenRenderbuffersEXT(1, &mDepthId);
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| 153 | glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, mDepthId);
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| 154 |
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| 155 | GLuint depthFormat;
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| 156 |
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| 157 | switch (d)
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| 158 | {
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| 159 | case DEPTH_16:
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| 160 | depthFormat = GL_DEPTH_COMPONENT16; break;
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| 161 | case DEPTH_24:
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| 162 | depthFormat = GL_DEPTH_COMPONENT24; break;
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| 163 | case DEPTH_32:
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| 164 | depthFormat = GL_DEPTH_COMPONENT32; break;
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[2861] | 165 | default:
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| 166 | cerr << "should not come here" << endl;
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[2855] | 167 | }
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| 168 |
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[2879] | 169 | glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, depthFormat, w, h);
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| 170 |
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| 171 |
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[2855] | 172 | glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, mDepthId);
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[2862] | 173 |
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| 174 | if (useDepthTex)
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| 175 | {
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| 176 | glGenTextures(1, &mDepthTexId);
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| 177 | glBindTexture(GL_TEXTURE_2D, mDepthTexId);
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| 178 |
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| 179 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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| 180 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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| 181 |
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| 182 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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| 183 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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| 184 | glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
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| 185 |
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[2866] | 186 | glTexImage2D(GL_TEXTURE_2D, 0, depthFormat, mWidth, mHeight, 0, GL_DEPTH_COMPONENT, GL_FLOAT, NULL);
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[2862] | 187 |
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| 188 | glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_TEXTURE_2D, mDepthTexId, 0);
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| 189 | }
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[2857] | 190 | }
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[2862] | 191 |
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| 192 | Release();
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[2855] | 193 | }
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| 194 |
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| 195 |
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[2878] | 196 | FrameBufferObject::~FrameBufferObject()
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| 197 | {
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| 198 | glDeleteFramebuffersEXT(1, &mId);
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| 199 | glDeleteRenderbuffersEXT(1, &mDepthId);
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| 200 |
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| 201 | if (mDepthTexId) glDeleteTextures(1, &mDepthTexId);
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| 202 |
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| 203 | CLEAR_CONTAINER(mColorBuffers);
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| 204 | }
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| 205 |
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| 206 |
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[2867] | 207 | int FrameBufferObject::AddColorBuffer(ColorBufferObject::FORMAT col,
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[2859] | 208 | ColorBufferObject::WRAP_TYPE wrapType,
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| 209 | ColorBufferObject::FILTER_TYPE filterType,
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[2867] | 210 | bool useMipMap)
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[2857] | 211 | {
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[2862] | 212 | Bind();
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[2861] | 213 |
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[2867] | 214 | const int idx = (int)mColorBuffers.size();
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| 215 |
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[2857] | 216 | ColorBufferObject *colorBuf =
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[2867] | 217 | new ColorBufferObject(mWidth, mHeight, col, wrapType, filterType, useMipMap, idx);
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[2861] | 218 |
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[2857] | 219 | mColorBuffers.push_back(colorBuf);
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| 220 |
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[2862] | 221 | Release();
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[2861] | 222 |
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| 223 | return idx;
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[2857] | 224 | }
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| 225 |
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[2859] | 226 |
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[2861] | 227 | void FrameBufferObject::Bind() const
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| 228 | {
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| 229 | glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mId);
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| 230 | }
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| 231 |
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| 232 |
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| 233 | void FrameBufferObject::Release()
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| 234 | {
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| 235 | glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
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| 236 | }
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| 237 |
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| 238 |
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[2855] | 239 | } // namespace
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