[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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| 11 |
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| 12 | void PrintFBOStatus(GLenum status)
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| 13 | {
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| 14 | switch(status)
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| 15 | {
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| 16 | case GL_FRAMEBUFFER_COMPLETE_EXT:
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| 17 | cout << "frame buffer object created successfully" << endl;
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| 18 | break;
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| 19 | case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT:
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| 20 | cerr << "incomplete attachment" << endl;
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| 21 | break;
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| 22 | case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT:
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| 23 | cerr << "missing attachment" << endl;
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| 24 | break;
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| 25 | case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT:
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| 26 | cerr << "incomplete dimensions" << endl;
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| 27 | break;
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| 28 | case GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT:
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| 29 | cerr << "incomplete formats" << endl;
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| 30 | break;
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| 31 | case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT:
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| 32 | cerr << "incomplete draw buffer" << endl;
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| 33 | break;
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| 34 | case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT:
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| 35 | cerr << "incomplete read buffer" << endl;
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| 36 | break;
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| 37 | case GL_FRAMEBUFFER_UNSUPPORTED_EXT:
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| 38 | cerr << "framebuffer unsupported" << endl;
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| 39 | break;
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| 40 | default:
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| 41 | cerr << "unknown status code " << status << endl;
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| 42 | }
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| 43 | }
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| 44 |
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| 45 |
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| 46 | ColorBufferObject::ColorBufferObject(int w, int h,
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[2856] | 47 | FORMAT c,
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| 48 | WRAP_TYPE wrapType,
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| 49 | FILTER_TYPE filterType,
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[2855] | 50 | bool useMipMap,
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| 51 | bool useMultiSampling)
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| 52 | {
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[2856] | 53 | glGenRenderbuffersEXT(1, &mId);
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| 54 | glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, mId);
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| 55 | glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_RGBA8, w, h);
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[2855] | 56 |
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[2856] | 57 | glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT2_EXT, GL_RENDERBUFFER_EXT, mId);
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[2855] | 58 |
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[2856] | 59 | glGenTextures(1, &mTexId);
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| 60 | glBindTexture(GL_TEXTURE_2D, mTexId);
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| 61 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
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| 62 | glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT2_EXT, GL_TEXTURE_2D, mTexId, 0);
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[2855] | 63 |
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[2856] | 64 | GLuint filterParam;
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[2855] | 65 |
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[2856] | 66 | switch (filterType)
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| 67 | {
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[2857] | 68 | case FILTER_NEAREST:
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[2856] | 69 | filterParam = GL_NEAREST; break;
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[2857] | 70 | case FILTER_LINEAR:
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[2856] | 71 | filterParam = GL_LINEAR; break;
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[2857] | 72 | case FILTER_MIPMAP_LINEAR:
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[2856] | 73 | filterParam = GL_LINEAR_MIPMAP_LINEAR; break;
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| 74 | }
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[2855] | 75 |
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[2856] | 76 |
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| 77 | GLuint wrapParam;
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| 78 |
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| 79 | switch (wrapType)
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| 80 | {
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[2857] | 81 | case WRAP_REPEAT:
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| 82 | wrapParam = GL_REPEAT; break;
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| 83 | case WRAP_CLAMP_TO_EDGE:
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| 84 | wrapParam = GL_CLAMP_TO_EDGE; break;
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[2856] | 85 | }
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| 86 |
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| 87 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filterParam);
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| 88 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filterParam);
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| 89 |
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| 90 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrapParam);
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| 91 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrapParam);
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| 92 |
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[2857] | 93 | // print status
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[2855] | 94 | PrintFBOStatus(glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT));
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| 95 | }
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| 96 |
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| 97 |
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| 98 | FrameBufferObject::FrameBufferObject(int w, int h, bool useDepth, DEPTH_FORMAT d)
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| 99 | : mWidth(w), mHeight(h)
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| 100 | {
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| 101 | glGenFramebuffersEXT(1, &mId);
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| 102 | glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mId);
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| 103 |
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| 104 |
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| 105 | ///////////
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| 106 | //-- create depth buffer
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| 107 |
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| 108 | if (useDepth)
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| 109 | {
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| 110 | glGenRenderbuffersEXT(1, &mDepthId);
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| 111 | glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, mDepthId);
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| 112 |
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| 113 | GLuint depthFormat;
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| 114 |
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| 115 | switch (d)
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| 116 | {
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| 117 | case DEPTH_16:
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| 118 | depthFormat = GL_DEPTH_COMPONENT16; break;
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| 119 | case DEPTH_24:
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| 120 | depthFormat = GL_DEPTH_COMPONENT24; break;
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| 121 | case DEPTH_32:
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| 122 | depthFormat = GL_DEPTH_COMPONENT32; break;
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| 123 | }
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| 124 |
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| 125 | glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, depthFormat, mWidth, mHeight);
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| 126 | glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, mDepthId);
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[2857] | 127 | }
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[2855] | 128 |
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[2857] | 129 | // print status
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| 130 | PrintFBOStatus(glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT));
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[2855] | 131 | }
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| 132 |
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| 133 |
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[2859] | 134 | int FrameBufferObject::AddColorBuffer(ColorBufferObject::FORMAT col,
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| 135 | ColorBufferObject::WRAP_TYPE wrapType,
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| 136 | ColorBufferObject::FILTER_TYPE filterType,
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| 137 | bool useMipMap,
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| 138 | bool useMultiSampling)
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[2857] | 139 | {
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| 140 | ColorBufferObject *colorBuf =
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| 141 | new ColorBufferObject(mWidth, mHeight, col, wrapType, filterType, useMipMap, useMultiSampling);
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| 142 | mColorBuffers.push_back(colorBuf);
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| 143 |
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[2859] | 144 | return (int)mColorBuffers.size() - 1;
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[2857] | 145 | }
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| 146 |
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[2859] | 147 |
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[2855] | 148 | } // namespace
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