1 | #ifndef _FrameBufferObject_H__
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2 | #define _FrameBufferObject_H__
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3 |
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4 | #include <vector>
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5 | #include "common.h"
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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 | /** This class implements a wrapper for a color buffer object
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12 | */
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13 | class ColorBufferObject
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14 | {
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15 | public:
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16 |
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17 | enum FORMAT {RGB_UBYTE, RGBA_UBYTE, RGB_FLOAT_16, RGBA_FLOAT_16, RGB_FLOAT_32, RGBA_FLOAT_32};
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18 | enum WRAP_TYPE {WRAP_REPEAT, WRAP_CLAMP_TO_EDGE, WRAP_CLAMP_TO_BORDER};
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19 | enum FILTER_TYPE {FILTER_NEAREST, FILTER_LINEAR};
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20 |
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21 |
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22 | /** Creates color buffer without mipmap. attachment_idx describes
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23 | the number of the render target the buffer is attached to
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24 | */
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25 | ColorBufferObject(int w, int h,
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26 | int attachment_idx ,
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27 | FORMAT c,
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28 | WRAP_TYPE wrapType,
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29 | FILTER_TYPE filterType);
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30 | /** Same as above, with mipmapping enabled.
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31 | */
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32 | ColorBufferObject(int w, int h,
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33 | int attachment_idx,
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34 | FORMAT c,
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35 | WRAP_TYPE wrapType,
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36 | FILTER_TYPE filterType,
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37 | FILTER_TYPE filterTypeMipMap
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38 | );
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39 |
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40 | ~ColorBufferObject();
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41 | /** Returns associated texture id.
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42 | */
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43 | inline unsigned int GetTexture() const { return mTexId; }
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44 | /** Returns width of render target.
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45 | */
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46 | inline int GetWidth() { return mWidth; }
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47 | /** Returns height of render target.
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48 | */
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49 | inline int GetHeight() { return mHeight; }
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50 | /** Returns texture data.
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51 | */
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52 | void *ReadTexture() const;
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53 |
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54 |
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55 |
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56 | protected:
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57 |
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58 | void Init(int w, int h,
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59 | int attachment_idx,
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60 | FORMAT format,
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61 | WRAP_TYPE wrapType,
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62 | FILTER_TYPE filterType,
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63 | bool useMipMap,
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64 | FILTER_TYPE filterTypeMipMap
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65 | );
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66 |
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67 |
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68 |
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69 | ///////////
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70 |
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71 | int mGlFormat;
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72 | int mInternalFormat;
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73 | unsigned int mId;
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74 | unsigned int mTexId;
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75 |
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76 | int mWidth;
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77 | int mHeight;
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78 | };
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79 |
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80 |
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81 | /** This class implements a wrapper for a frame buffer object.
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82 | */
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83 | class FrameBufferObject
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84 | {
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85 | public:
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86 |
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87 | /// Available depth formats
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88 | enum DEPTH_FORMAT {DEPTH_NONE, DEPTH_16, DEPTH_24, DEPTH_32};
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89 |
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90 | /** constructor requesting an opengl occlusion query.
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91 | */
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92 | FrameBufferObject(int w, int h, DEPTH_FORMAT d, bool useDepthTex = false);
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93 | /** Destructor destroying gl resources.
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94 | */
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95 | ~FrameBufferObject();
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96 | /** Creates and adds a color buffer to the current frame buffer object.
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97 | Returns the index that allows to retrieve the color buffer object.
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98 | */
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99 | int AddColorBuffer(ColorBufferObject::FORMAT col,
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100 | ColorBufferObject::WRAP_TYPE wrapType,
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101 | ColorBufferObject::FILTER_TYPE filterType);
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102 |
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103 | /** Same as above, but enables mipmapping using the specified filter.
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104 | */
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105 | int AddColorBuffer(ColorBufferObject::FORMAT col,
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106 | ColorBufferObject::WRAP_TYPE wrapType,
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107 | ColorBufferObject::FILTER_TYPE filterType,
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108 | ColorBufferObject::FILTER_TYPE filterTypeMipMap);
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109 |
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110 | /** Binds this frame buffer object.
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111 | */
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112 | void Bind() const;
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113 |
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114 | ///////////////////
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115 |
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116 | /** Returns the color buffer object on position i.
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117 | */
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118 | inline ColorBufferObject *GetColorBuffer(int i) const { return mColorBuffers[i]; }
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119 | /** Returns depth texture id
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120 | */
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121 | inline unsigned int GetDepthTex() const { return mDepthTexId; }
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122 | /** Returns width of fbo
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123 | */
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124 | inline int GetWidth() { return mWidth; }
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125 | /** Returns height of fbo
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126 | */
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127 | inline int GetHeight() { return mHeight; }
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128 |
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129 |
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130 | ////////////////
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131 |
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132 | /** Initialise a render target (using current clear color)
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133 | */
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134 | static void InitBuffer(FrameBufferObject *fbo, int index);
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135 | /** Releases any bound frame buffer object.
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136 | */
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137 | static void Release();
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138 |
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139 | protected:
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140 |
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141 | std::vector<ColorBufferObject *> mColorBuffers;
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142 |
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143 | unsigned int mId;
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144 | unsigned int mDepthId;
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145 |
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146 | int mHeight;
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147 | int mWidth;
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148 |
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149 | unsigned int mDepthTexId;
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150 |
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151 | static int sCurrentFbo;
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152 | };
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153 |
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154 |
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155 | } // namespace
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156 |
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157 | #endif // _FrameBufferObject_H__ |
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