[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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[3017] | 95 | mGlFormat = GL_UNSIGNED_BYTE; mInternalFormat = GL_RGB8; components = GL_RGB; break;
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[3005] | 96 | case RGBA_UBYTE:
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[2965] | 97 | mGlFormat = GL_UNSIGNED_BYTE; mInternalFormat = GL_RGBA8; break;
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[3017] | 98 | case RGB_FLOAT_32:
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| 99 | mGlFormat = GL_FLOAT; mInternalFormat = GL_RGB16F_ARB; components = GL_RGB; 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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[3017] | 102 | case RGB_FLOAT_16:
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| 103 | mGlFormat = GL_FLOAT; mInternalFormat = GL_RGB32F_ARB; components = GL_RGB; break;
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[3005] | 104 | case RGBA_FLOAT_32:
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[2965] | 105 | mGlFormat = GL_FLOAT; mInternalFormat = GL_RGBA32F_ARB; break;
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[2861] | 106 | default:
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[2965] | 107 | mGlFormat = GL_UNSIGNED_BYTE; mInternalFormat = GL_RGBA8;
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[2861] | 108 | cerr << "should not come here" << endl;
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| 109 | }
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| 110 |
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[2879] | 111 |
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[2856] | 112 | glGenRenderbuffersEXT(1, &mId);
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| 113 | glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, mId);
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[2855] | 114 |
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[2965] | 115 | glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, mInternalFormat, w, h);
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[2899] | 116 | glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, mrt[attachment_idx], GL_RENDERBUFFER_EXT, mId);
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[2855] | 117 |
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[2879] | 118 |
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[2856] | 119 | glGenTextures(1, &mTexId);
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| 120 | glBindTexture(GL_TEXTURE_2D, mTexId);
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[3005] | 121 | glTexImage2D(GL_TEXTURE_2D, 0, mInternalFormat, w, h, 0, components, mGlFormat, NULL);
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[2862] | 122 |
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[2899] | 123 | glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, mrt[attachment_idx], GL_TEXTURE_2D, mTexId, 0);
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[2855] | 124 |
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[2867] | 125 | GLuint minfilterParam;
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| 126 | GLuint magfilterParam;
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[2855] | 127 |
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[2965] | 128 | if (filterType == FILTER_NEAREST)
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[2867] | 129 | magfilterParam = GL_NEAREST;
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[2965] | 130 | else // FILTER_LINEAR
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| 131 | magfilterParam = GL_LINEAR;
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[2867] | 132 |
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[2965] | 133 | if (!useMipMap)
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| 134 | {
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| 135 | if (filterType == FILTER_NEAREST)
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| 136 | minfilterParam = GL_NEAREST;
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| 137 | else // FILTER_LINEAR
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| 138 | minfilterParam = GL_LINEAR;
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[2856] | 139 | }
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[2965] | 140 | else
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| 141 | {
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| 142 | if (filterType == FILTER_NEAREST)
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| 143 | {
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| 144 | if (filterTypeMipMap == FILTER_NEAREST)
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| 145 | minfilterParam = GL_NEAREST_MIPMAP_NEAREST;
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| 146 | else // FILTER_LINEAR
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| 147 | minfilterParam = GL_NEAREST_MIPMAP_LINEAR;
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| 148 | }
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| 149 | else // FILTER_LINEAR
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| 150 | {
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| 151 | if (filterTypeMipMap == FILTER_NEAREST)
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| 152 | minfilterParam = GL_LINEAR_MIPMAP_NEAREST;
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| 153 | else // FILTER_LINEAR
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| 154 | minfilterParam = GL_LINEAR_MIPMAP_LINEAR;
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| 155 | }
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| 156 | }
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[2855] | 157 |
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[2856] | 158 | GLuint wrapParam;
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| 159 |
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| 160 | switch (wrapType)
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| 161 | {
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[2857] | 162 | case WRAP_REPEAT:
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| 163 | wrapParam = GL_REPEAT; break;
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| 164 | case WRAP_CLAMP_TO_EDGE:
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| 165 | wrapParam = GL_CLAMP_TO_EDGE; break;
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[2856] | 166 | }
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| 167 |
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[2867] | 168 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, magfilterParam);
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| 169 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, minfilterParam);
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[2856] | 170 |
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| 171 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrapParam);
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| 172 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrapParam);
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| 173 |
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[2976] | 174 | if (useMipMap)
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| 175 | {
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| 176 | glGenerateMipmapEXT(GL_TEXTURE_2D);
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| 177 | }
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[2867] | 178 |
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[2857] | 179 | // print status
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[2855] | 180 | PrintFBOStatus(glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT));
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| 181 | }
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| 182 |
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| 183 |
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[2965] | 184 |
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| 185 | void *ColorBufferObject::ReadTexture() const
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[2878] | 186 | {
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[2965] | 187 | int bytes = 0;
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| 188 |
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| 189 | switch (mInternalFormat)
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| 190 | {
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[3005] | 191 | case GL_RGB8:
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| 192 | bytes = 3; break;
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[2965] | 193 | case GL_RGBA8:
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[3005] | 194 | bytes = 4; break;
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[2965] | 195 | case GL_RGBA16F_ARB:
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| 196 | bytes = 16; break;
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[3005] | 197 | case GL_RGB32F_ARB:
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| 198 | bytes = 24; break;
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[2965] | 199 | case GL_RGBA32F_ARB:
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| 200 | bytes = 32; break;
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| 201 | default:
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| 202 | cerr << "should not come here" << endl;
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| 203 | }
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| 204 |
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[2979] | 205 |
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[2965] | 206 | glBindTexture(GL_TEXTURE_2D, mTexId);
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[2979] | 207 |
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[3005] | 208 | /*GLint width, height;
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[2979] | 209 | glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &width);
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[2976] | 210 | glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &height);
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[3005] | 211 | cout << "w: " << width << "h: " << height << endl;
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| 212 | */
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[2976] | 213 |
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[3005] | 214 | unsigned char *data = new unsigned char[bytes * 4 * mWidth * mHeight];
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[2979] | 215 |
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| 216 | glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_FLOAT, data);
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[2976] | 217 |
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[2965] | 218 | glBindTexture(GL_TEXTURE_2D, 0);
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| 219 | glDisable(GL_TEXTURE_2D);
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| 220 |
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| 221 | return data;
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[2878] | 222 | }
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| 223 |
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| 224 |
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[2965] | 225 | /*****************************************************************/
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| 226 | /* FrameBufferObject implementation */
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| 227 | /*****************************************************************/
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| 228 |
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| 229 |
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[2862] | 230 | FrameBufferObject::FrameBufferObject(int w, int h, DEPTH_FORMAT d, bool useDepthTex)
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| 231 | : mWidth(w), mHeight(h), mDepthTexId(0)
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[2855] | 232 | {
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| 233 | glGenFramebuffersEXT(1, &mId);
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[2862] | 234 |
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| 235 | Bind();
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[2855] | 236 | ///////////
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| 237 | //-- create depth buffer
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| 238 |
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[2861] | 239 | if (d != DEPTH_NONE)
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[2855] | 240 | {
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| 241 | glGenRenderbuffersEXT(1, &mDepthId);
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| 242 | glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, mDepthId);
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| 243 |
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| 244 | GLuint depthFormat;
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| 245 |
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| 246 | switch (d)
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| 247 | {
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| 248 | case DEPTH_16:
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| 249 | depthFormat = GL_DEPTH_COMPONENT16; break;
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| 250 | case DEPTH_24:
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| 251 | depthFormat = GL_DEPTH_COMPONENT24; break;
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| 252 | case DEPTH_32:
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| 253 | depthFormat = GL_DEPTH_COMPONENT32; break;
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[2861] | 254 | default:
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| 255 | cerr << "should not come here" << endl;
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[2855] | 256 | }
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| 257 |
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[2879] | 258 | glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, depthFormat, w, h);
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| 259 |
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| 260 |
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[2855] | 261 | glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, mDepthId);
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[2862] | 262 |
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| 263 | if (useDepthTex)
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| 264 | {
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| 265 | glGenTextures(1, &mDepthTexId);
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| 266 | glBindTexture(GL_TEXTURE_2D, mDepthTexId);
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| 267 |
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| 268 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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| 269 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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| 270 |
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| 271 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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| 272 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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[2965] | 273 |
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[2862] | 274 | glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
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| 275 |
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[2866] | 276 | glTexImage2D(GL_TEXTURE_2D, 0, depthFormat, mWidth, mHeight, 0, GL_DEPTH_COMPONENT, GL_FLOAT, NULL);
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[2862] | 277 |
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| 278 | glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_TEXTURE_2D, mDepthTexId, 0);
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| 279 | }
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[2857] | 280 | }
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[2862] | 281 |
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| 282 | Release();
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[2855] | 283 | }
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| 284 |
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| 285 |
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[2878] | 286 | FrameBufferObject::~FrameBufferObject()
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| 287 | {
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| 288 | glDeleteFramebuffersEXT(1, &mId);
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| 289 | glDeleteRenderbuffersEXT(1, &mDepthId);
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| 290 |
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| 291 | if (mDepthTexId) glDeleteTextures(1, &mDepthTexId);
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| 292 |
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| 293 | CLEAR_CONTAINER(mColorBuffers);
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| 294 | }
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| 295 |
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| 296 |
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[2867] | 297 | int FrameBufferObject::AddColorBuffer(ColorBufferObject::FORMAT col,
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[2859] | 298 | ColorBufferObject::WRAP_TYPE wrapType,
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| 299 | ColorBufferObject::FILTER_TYPE filterType,
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[2965] | 300 | ColorBufferObject::FILTER_TYPE filterTypeMipMap)
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[2857] | 301 | {
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[2862] | 302 | Bind();
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[2861] | 303 |
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[2867] | 304 | const int idx = (int)mColorBuffers.size();
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| 305 |
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[2857] | 306 | ColorBufferObject *colorBuf =
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[2965] | 307 | new ColorBufferObject(mWidth, mHeight, idx, col, wrapType, filterType, filterTypeMipMap);
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[2861] | 308 |
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[2857] | 309 | mColorBuffers.push_back(colorBuf);
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| 310 |
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[2862] | 311 | Release();
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[2861] | 312 |
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| 313 | return idx;
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[2857] | 314 | }
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| 315 |
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[2859] | 316 |
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[2965] | 317 |
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| 318 | int FrameBufferObject::AddColorBuffer(ColorBufferObject::FORMAT col,
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| 319 | ColorBufferObject::WRAP_TYPE wrapType,
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| 320 | ColorBufferObject::FILTER_TYPE filterType)
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| 321 | {
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| 322 | Bind();
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| 323 |
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| 324 | const int idx = (int)mColorBuffers.size();
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| 325 |
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| 326 | ColorBufferObject *colorBuf =
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| 327 | new ColorBufferObject(mWidth, mHeight, idx, col, wrapType, filterType);
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| 328 |
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| 329 | mColorBuffers.push_back(colorBuf);
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| 330 |
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| 331 | Release();
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| 332 |
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| 333 | return idx;
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| 334 | }
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| 335 |
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| 336 |
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[2861] | 337 | void FrameBufferObject::Bind() const
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| 338 | {
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[3007] | 339 | if (sCurrentFbo != mId)
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| 340 | {
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| 341 | sCurrentFbo = mId;
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| 342 | glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mId);
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| 343 | }
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[2861] | 344 | }
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| 345 |
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| 346 |
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| 347 | void FrameBufferObject::Release()
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| 348 | {
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| 349 | glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
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[3007] | 350 | sCurrentFbo = -1;
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[2861] | 351 | }
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| 352 |
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| 353 |
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[2855] | 354 | } // namespace
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