[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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[3007] | 11 | int FrameBufferObject::sCurrentFbo = -1;
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[2855] | 12 |
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[3007] | 13 |
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[2855] | 14 | void PrintFBOStatus(GLenum status)
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| 15 | {
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| 16 | switch(status)
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| 17 | {
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| 18 | case GL_FRAMEBUFFER_COMPLETE_EXT:
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[2879] | 19 | //cout << "frame buffer object complete" << endl;
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[2855] | 20 | break;
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| 21 | case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT:
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| 22 | cerr << "incomplete attachment" << endl;
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| 23 | break;
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| 24 | case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT:
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| 25 | cerr << "missing attachment" << endl;
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| 26 | break;
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| 27 | case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT:
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| 28 | cerr << "incomplete dimensions" << endl;
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| 29 | break;
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| 30 | case GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT:
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| 31 | cerr << "incomplete formats" << endl;
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| 32 | break;
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| 33 | case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT:
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| 34 | cerr << "incomplete draw buffer" << endl;
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| 35 | break;
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| 36 | case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT:
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| 37 | cerr << "incomplete read buffer" << endl;
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| 38 | break;
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| 39 | case GL_FRAMEBUFFER_UNSUPPORTED_EXT:
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| 40 | cerr << "framebuffer unsupported" << endl;
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| 41 | break;
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| 42 | default:
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| 43 | cerr << "unknown status code " << status << endl;
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| 44 | }
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| 45 | }
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| 46 |
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| 47 |
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| 48 | ColorBufferObject::ColorBufferObject(int w, int h,
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[2965] | 49 | int attachment_idx,
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[2861] | 50 | FORMAT format,
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[2856] | 51 | WRAP_TYPE wrapType,
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| 52 | FILTER_TYPE filterType,
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[2965] | 53 | FILTER_TYPE filterTypeMipMap
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| 54 | )
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[2855] | 55 | {
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[2965] | 56 | Init(w, h, attachment_idx, format, wrapType, filterType, true, filterTypeMipMap);
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| 57 | }
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[2861] | 58 |
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| 59 |
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[2965] | 60 | ColorBufferObject::ColorBufferObject(int w, int h,
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| 61 | int attachment_idx,
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| 62 | FORMAT format,
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| 63 | WRAP_TYPE wrapType,
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| 64 | FILTER_TYPE filterType
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| 65 | )
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| 66 | {
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| 67 | Init(w, h, attachment_idx, format, wrapType, filterType, false, FILTER_NEAREST);
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| 68 | }
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| 69 |
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| 70 |
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| 71 | ColorBufferObject::~ColorBufferObject()
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| 72 | {
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| 73 | glDeleteRenderbuffersEXT(1, &mId);
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| 74 | glDeleteTextures(1, &mTexId);
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| 75 | }
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| 76 |
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| 77 |
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| 78 | void ColorBufferObject::Init(int w, int h,
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| 79 | int attachment_idx,
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| 80 | FORMAT format,
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| 81 | WRAP_TYPE wrapType,
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| 82 | FILTER_TYPE filterType,
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| 83 | bool useMipMap,
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| 84 | FILTER_TYPE filterTypeMipMap
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| 85 | )
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| 86 | {
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| 87 | mWidth = w;
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| 88 | mHeight = h;
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| 89 |
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[3005] | 90 | int components = GL_RGBA;
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[2999] | 91 |
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[2861] | 92 | switch (format)
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| 93 | {
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[3005] | 94 | case RGB_UBYTE:
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| 95 | mGlFormat = GL_UNSIGNED_BYTE; mInternalFormat = GL_RGB8;
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| 96 | components = GL_RGB;
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| 97 | break;
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| 98 | case RGBA_UBYTE:
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[2965] | 99 | mGlFormat = GL_UNSIGNED_BYTE; mInternalFormat = GL_RGBA8; break;
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[3005] | 100 | case RGBA_FLOAT_16:
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[2965] | 101 | mGlFormat = GL_FLOAT; mInternalFormat = GL_RGBA16F_ARB; break;
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[3005] | 102 | case RGB_FLOAT_32:
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| 103 | mGlFormat = GL_FLOAT; mInternalFormat = GL_RGB32F_ARB;
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| 104 | components = GL_RGB;
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| 105 | break;
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| 106 | case RGBA_FLOAT_32:
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[2965] | 107 | mGlFormat = GL_FLOAT; mInternalFormat = GL_RGBA32F_ARB; break;
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[2861] | 108 | default:
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[2965] | 109 | mGlFormat = GL_UNSIGNED_BYTE; mInternalFormat = GL_RGBA8;
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[2861] | 110 | cerr << "should not come here" << endl;
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| 111 | }
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| 112 |
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[2879] | 113 |
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[2856] | 114 | glGenRenderbuffersEXT(1, &mId);
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| 115 | glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, mId);
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[2855] | 116 |
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[2965] | 117 | glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, mInternalFormat, w, h);
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[2899] | 118 | glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, mrt[attachment_idx], GL_RENDERBUFFER_EXT, mId);
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[2855] | 119 |
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[2879] | 120 |
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[2856] | 121 | glGenTextures(1, &mTexId);
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| 122 | glBindTexture(GL_TEXTURE_2D, mTexId);
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[3005] | 123 | glTexImage2D(GL_TEXTURE_2D, 0, mInternalFormat, w, h, 0, components, mGlFormat, NULL);
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[2862] | 124 |
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[2899] | 125 | glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, mrt[attachment_idx], GL_TEXTURE_2D, mTexId, 0);
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[2855] | 126 |
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[2867] | 127 | GLuint minfilterParam;
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| 128 | GLuint magfilterParam;
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[2855] | 129 |
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[2965] | 130 | if (filterType == FILTER_NEAREST)
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[2867] | 131 | magfilterParam = GL_NEAREST;
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[2965] | 132 | else // FILTER_LINEAR
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| 133 | magfilterParam = GL_LINEAR;
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[2867] | 134 |
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[2965] | 135 | if (!useMipMap)
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| 136 | {
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| 137 | if (filterType == FILTER_NEAREST)
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| 138 | minfilterParam = GL_NEAREST;
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| 139 | else // FILTER_LINEAR
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| 140 | minfilterParam = GL_LINEAR;
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[2856] | 141 | }
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[2965] | 142 | else
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| 143 | {
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| 144 | if (filterType == FILTER_NEAREST)
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| 145 | {
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| 146 | if (filterTypeMipMap == FILTER_NEAREST)
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| 147 | minfilterParam = GL_NEAREST_MIPMAP_NEAREST;
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| 148 | else // FILTER_LINEAR
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| 149 | minfilterParam = GL_NEAREST_MIPMAP_LINEAR;
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| 150 | }
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| 151 | else // FILTER_LINEAR
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| 152 | {
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| 153 | if (filterTypeMipMap == FILTER_NEAREST)
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| 154 | minfilterParam = GL_LINEAR_MIPMAP_NEAREST;
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| 155 | else // FILTER_LINEAR
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| 156 | minfilterParam = GL_LINEAR_MIPMAP_LINEAR;
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| 157 | }
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| 158 | }
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[2855] | 159 |
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[2856] | 160 | GLuint wrapParam;
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| 161 |
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| 162 | switch (wrapType)
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| 163 | {
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[2857] | 164 | case WRAP_REPEAT:
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| 165 | wrapParam = GL_REPEAT; break;
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| 166 | case WRAP_CLAMP_TO_EDGE:
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| 167 | wrapParam = GL_CLAMP_TO_EDGE; break;
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[2856] | 168 | }
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| 169 |
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[2867] | 170 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, magfilterParam);
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| 171 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, minfilterParam);
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[2856] | 172 |
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| 173 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrapParam);
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| 174 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrapParam);
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| 175 |
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[2976] | 176 | if (useMipMap)
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| 177 | {
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| 178 | glGenerateMipmapEXT(GL_TEXTURE_2D);
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| 179 | }
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[2867] | 180 |
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[2857] | 181 | // print status
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[2855] | 182 | PrintFBOStatus(glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT));
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| 183 | }
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| 184 |
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| 185 |
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[2965] | 186 |
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| 187 | void *ColorBufferObject::ReadTexture() const
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[2878] | 188 | {
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[2965] | 189 | int bytes = 0;
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| 190 |
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| 191 | switch (mInternalFormat)
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| 192 | {
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[3005] | 193 | case GL_RGB8:
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| 194 | bytes = 3; break;
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[2965] | 195 | case GL_RGBA8:
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[3005] | 196 | bytes = 4; break;
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[2965] | 197 | case GL_RGBA16F_ARB:
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| 198 | bytes = 16; break;
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[3005] | 199 | case GL_RGB32F_ARB:
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| 200 | bytes = 24; break;
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[2965] | 201 | case GL_RGBA32F_ARB:
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| 202 | bytes = 32; break;
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| 203 | default:
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| 204 | cerr << "should not come here" << endl;
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| 205 | }
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| 206 |
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[2979] | 207 |
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[2965] | 208 | glBindTexture(GL_TEXTURE_2D, mTexId);
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[2979] | 209 |
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[3005] | 210 | /*GLint width, height;
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[2979] | 211 | glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &width);
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[2976] | 212 | glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &height);
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[3005] | 213 | cout << "w: " << width << "h: " << height << endl;
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| 214 | */
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[2976] | 215 |
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[3005] | 216 | unsigned char *data = new unsigned char[bytes * 4 * mWidth * mHeight];
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[2979] | 217 |
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| 218 | glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_FLOAT, data);
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[2976] | 219 |
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[2965] | 220 | glBindTexture(GL_TEXTURE_2D, 0);
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| 221 | glDisable(GL_TEXTURE_2D);
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| 222 |
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| 223 | return data;
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[2878] | 224 | }
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| 225 |
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| 226 |
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[2965] | 227 | /*****************************************************************/
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| 228 | /* FrameBufferObject implementation */
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| 229 | /*****************************************************************/
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| 230 |
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| 231 |
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[2862] | 232 | FrameBufferObject::FrameBufferObject(int w, int h, DEPTH_FORMAT d, bool useDepthTex)
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| 233 | : mWidth(w), mHeight(h), mDepthTexId(0)
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[2855] | 234 | {
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| 235 | glGenFramebuffersEXT(1, &mId);
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[2862] | 236 |
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| 237 | Bind();
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[2855] | 238 | ///////////
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| 239 | //-- create depth buffer
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| 240 |
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[2861] | 241 | if (d != DEPTH_NONE)
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[2855] | 242 | {
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| 243 | glGenRenderbuffersEXT(1, &mDepthId);
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| 244 | glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, mDepthId);
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| 245 |
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| 246 | GLuint depthFormat;
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| 247 |
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| 248 | switch (d)
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| 249 | {
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| 250 | case DEPTH_16:
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| 251 | depthFormat = GL_DEPTH_COMPONENT16; break;
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| 252 | case DEPTH_24:
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| 253 | depthFormat = GL_DEPTH_COMPONENT24; break;
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| 254 | case DEPTH_32:
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| 255 | depthFormat = GL_DEPTH_COMPONENT32; break;
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[2861] | 256 | default:
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| 257 | cerr << "should not come here" << endl;
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[2855] | 258 | }
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| 259 |
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[2879] | 260 | glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, depthFormat, w, h);
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| 261 |
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| 262 |
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[2855] | 263 | glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, mDepthId);
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[2862] | 264 |
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| 265 | if (useDepthTex)
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| 266 | {
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| 267 | glGenTextures(1, &mDepthTexId);
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| 268 | glBindTexture(GL_TEXTURE_2D, mDepthTexId);
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| 269 |
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| 270 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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| 271 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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| 272 |
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| 273 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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| 274 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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[2965] | 275 |
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[2862] | 276 | glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
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| 277 |
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[2866] | 278 | glTexImage2D(GL_TEXTURE_2D, 0, depthFormat, mWidth, mHeight, 0, GL_DEPTH_COMPONENT, GL_FLOAT, NULL);
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[2862] | 279 |
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| 280 | glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_TEXTURE_2D, mDepthTexId, 0);
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| 281 | }
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[2857] | 282 | }
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[2862] | 283 |
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| 284 | Release();
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[2855] | 285 | }
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| 286 |
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| 287 |
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[2878] | 288 | FrameBufferObject::~FrameBufferObject()
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| 289 | {
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| 290 | glDeleteFramebuffersEXT(1, &mId);
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| 291 | glDeleteRenderbuffersEXT(1, &mDepthId);
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| 292 |
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| 293 | if (mDepthTexId) glDeleteTextures(1, &mDepthTexId);
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| 294 |
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| 295 | CLEAR_CONTAINER(mColorBuffers);
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| 296 | }
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| 297 |
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| 298 |
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[2867] | 299 | int FrameBufferObject::AddColorBuffer(ColorBufferObject::FORMAT col,
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[2859] | 300 | ColorBufferObject::WRAP_TYPE wrapType,
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| 301 | ColorBufferObject::FILTER_TYPE filterType,
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[2965] | 302 | ColorBufferObject::FILTER_TYPE filterTypeMipMap)
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[2857] | 303 | {
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[2862] | 304 | Bind();
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[2861] | 305 |
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[2867] | 306 | const int idx = (int)mColorBuffers.size();
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| 307 |
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[2857] | 308 | ColorBufferObject *colorBuf =
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[2965] | 309 | new ColorBufferObject(mWidth, mHeight, idx, col, wrapType, filterType, filterTypeMipMap);
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[2861] | 310 |
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[2857] | 311 | mColorBuffers.push_back(colorBuf);
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| 312 |
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[2862] | 313 | Release();
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[2861] | 314 |
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| 315 | return idx;
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[2857] | 316 | }
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| 317 |
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[2859] | 318 |
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[2965] | 319 |
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| 320 | int FrameBufferObject::AddColorBuffer(ColorBufferObject::FORMAT col,
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| 321 | ColorBufferObject::WRAP_TYPE wrapType,
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| 322 | ColorBufferObject::FILTER_TYPE filterType)
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| 323 | {
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| 324 | Bind();
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| 325 |
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| 326 | const int idx = (int)mColorBuffers.size();
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| 327 |
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| 328 | ColorBufferObject *colorBuf =
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| 329 | new ColorBufferObject(mWidth, mHeight, idx, col, wrapType, filterType);
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| 330 |
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| 331 | mColorBuffers.push_back(colorBuf);
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| 332 |
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| 333 | Release();
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| 334 |
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| 335 | return idx;
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| 336 | }
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| 337 |
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| 338 |
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[2861] | 339 | void FrameBufferObject::Bind() const
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| 340 | {
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[3007] | 341 | if (sCurrentFbo != mId)
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| 342 | {
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| 343 | sCurrentFbo = mId;
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| 344 | glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mId);
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| 345 | }
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[2861] | 346 | }
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| 347 |
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| 348 |
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| 349 | void FrameBufferObject::Release()
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| 350 | {
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| 351 | glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
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[3007] | 352 | sCurrentFbo = -1;
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[2861] | 353 | }
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| 354 |
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| 355 |
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[2855] | 356 | } // namespace
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