1 | |
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2 | /* |
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3 | * ---------------------------------------------------------------------- |
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4 | * Texture3d.cpp: 3d texture class |
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5 | * |
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6 | * ====================================================================== |
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7 | * AUTHOR: Wei Qiao <qiaow@purdue.edu> |
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8 | * Purdue Rendering and Perceptualization Lab (PURPL) |
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9 | * |
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10 | * Copyright (c) 2004-2006 Purdue Research Foundation |
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11 | * |
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12 | * See the file "license.terms" for information on usage and |
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13 | * redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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14 | * ====================================================================== |
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15 | */ |
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16 | |
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17 | #include "Texture3D.h" |
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18 | #include <stdio.h> |
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19 | #include <assert.h> |
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20 | #include <math.h> |
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21 | |
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22 | #include "config.h" |
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23 | |
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24 | Texture3D::Texture3D(){ id=0; gl_resource_allocated = false; } |
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25 | |
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26 | Texture3D::Texture3D(int width, int height, int depth, GLuint type=GL_FLOAT, GLuint interp=GL_LINEAR, int components=4) |
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27 | { |
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28 | assert(type == GL_UNSIGNED_BYTE || type == GL_FLOAT|| type ==GL_UNSIGNED_INT); |
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29 | assert(interp == GL_LINEAR || interp == GL_NEAREST); |
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30 | |
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31 | this->width = width; |
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32 | this->height = height; |
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33 | this->depth = depth; |
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34 | |
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35 | //int m = (width > height) ? width : height; |
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36 | //m = (m > depth) ? m : depth; |
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37 | |
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38 | //int m = max(max(width, height), depth); |
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39 | this->aspect_ratio_width = 1.; |
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40 | this->aspect_ratio_height = (double)height/(double)width; |
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41 | this->aspect_ratio_depth = (double)depth/(double)width; |
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42 | |
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43 | //this->aspect_ratio_width = (double)width/(double)m; |
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44 | //this->aspect_ratio_height = (double)height/(double)m; |
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45 | //this->aspect_ratio_depth = (double)depth/(double)m; |
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46 | |
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47 | this->type = type; |
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48 | this->interp_type = interp; |
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49 | this->n_components = components; |
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50 | |
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51 | this->id = 0; |
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52 | gl_resource_allocated = false; |
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53 | } |
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54 | |
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55 | void Texture3D::update(float* data) |
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56 | { |
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57 | //load texture with 16 bit half floating point precision if card is 6 series NV40 |
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58 | //half float with linear interpolation is only supported by 6 series and up cards |
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59 | //If NV40 not defined, data is quantized to 8-bit from 32-bit. |
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60 | glPixelStorei(GL_UNPACK_ALIGNMENT, 1); |
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61 | |
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62 | glBindTexture(GL_TEXTURE_3D, id); |
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63 | assert(id != (GLuint)-1); |
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64 | |
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65 | glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); |
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66 | glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); |
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67 | glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE); |
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68 | |
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69 | if(interp_type==GL_LINEAR){ |
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70 | glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
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71 | glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
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72 | } |
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73 | else{ |
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74 | glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
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75 | glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
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76 | } |
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77 | |
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78 | //to do: add handling to more formats |
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79 | if(type==GL_FLOAT){ |
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80 | switch(n_components){ |
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81 | #ifdef NV40 |
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82 | case 1: |
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83 | glTexImage3D(GL_TEXTURE_3D, 0, GL_LUMINANCE16F_ARB, width, height, depth, 0, GL_LUMINANCE, GL_FLOAT, data); |
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84 | break; |
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85 | case 2: |
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86 | glTexImage3D(GL_TEXTURE_3D, 0, GL_LUMINANCE_ALPHA16F_ARB, width, height, depth, 0, GL_LUMINANCE_ALPHA, GL_FLOAT, data); |
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87 | break; |
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88 | case 3: |
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89 | glTexImage3D(GL_TEXTURE_3D, 0, GL_RGB16F_ARB, width, height, depth, 0, GL_RGB, GL_FLOAT, data); |
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90 | break; |
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91 | case 4: |
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92 | glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA16F_ARB, width, height, depth, 0, GL_RGBA, GL_FLOAT, data); |
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93 | break; |
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94 | #else |
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95 | case 1: |
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96 | glTexImage3D(GL_TEXTURE_3D, 0, GL_LUMINANCE, width, height, depth, 0, GL_LUMINANCE, GL_FLOAT, data); |
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97 | break; |
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98 | case 2: |
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99 | glTexImage3D(GL_TEXTURE_3D, 0, GL_LUMINANCE_ALPHA, width, height, depth, 0, GL_LUMINANCE_ALPHA, GL_FLOAT, data); |
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100 | break; |
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101 | case 3: |
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102 | glTexImage3D(GL_TEXTURE_3D, 0, GL_RGB, width, height, depth, 0, GL_RGB, GL_FLOAT, data); |
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103 | break; |
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104 | case 4: |
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105 | glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA, width, height, depth, 0, GL_RGBA, GL_FLOAT, data); |
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106 | break; |
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107 | #endif |
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108 | default: |
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109 | break; |
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110 | } |
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111 | } |
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112 | |
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113 | |
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114 | assert(glGetError()==0); |
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115 | |
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116 | gl_resource_allocated = true; |
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117 | |
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118 | } |
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119 | |
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120 | GLuint Texture3D::initialize(float *data) |
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121 | { |
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122 | if (id != 0) glDeleteTextures(1, &id); |
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123 | |
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124 | //load texture with 16 bit half floating point precision if card is 6 series NV40 |
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125 | //half float with linear interpolation is only supported by 6 series and up cards |
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126 | //If NV40 not defined, data is quantized to 8-bit from 32-bit. |
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127 | glPixelStorei(GL_UNPACK_ALIGNMENT, 1); |
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128 | |
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129 | glGenTextures(1, &id); |
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130 | glBindTexture(GL_TEXTURE_3D, id); |
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131 | assert(id != (GLuint)-1); |
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132 | |
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133 | glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); |
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134 | glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); |
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135 | glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE); |
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136 | |
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137 | if(interp_type==GL_LINEAR){ |
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138 | glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
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139 | glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
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140 | } |
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141 | else{ |
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142 | glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
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143 | glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
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144 | } |
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145 | |
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146 | //to do: add handling to more formats |
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147 | if(type==GL_FLOAT){ |
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148 | switch(n_components){ |
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149 | #ifdef NV40 |
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150 | case 1: |
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151 | glTexImage3D(GL_TEXTURE_3D, 0, GL_LUMINANCE16F_ARB, width, height, depth, 0, GL_LUMINANCE, GL_FLOAT, data); |
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152 | break; |
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153 | case 2: |
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154 | glTexImage3D(GL_TEXTURE_3D, 0, GL_LUMINANCE_ALPHA16F_ARB, width, height, depth, 0, GL_LUMINANCE_ALPHA, GL_FLOAT, data); |
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155 | break; |
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156 | case 3: |
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157 | glTexImage3D(GL_TEXTURE_3D, 0, GL_RGB16F_ARB, width, height, depth, 0, GL_RGB, GL_FLOAT, data); |
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158 | break; |
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159 | case 4: |
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160 | glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA16F_ARB, width, height, depth, 0, GL_RGBA, GL_FLOAT, data); |
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161 | break; |
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162 | #else |
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163 | case 1: |
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164 | glTexImage3D(GL_TEXTURE_3D, 0, GL_LUMINANCE, width, height, depth, 0, GL_LUMINANCE, GL_FLOAT, data); |
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165 | break; |
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166 | case 2: |
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167 | glTexImage3D(GL_TEXTURE_3D, 0, GL_LUMINANCE_ALPHA, width, height, depth, 0, GL_LUMINANCE_ALPHA, GL_FLOAT, data); |
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168 | break; |
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169 | case 3: |
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170 | glTexImage3D(GL_TEXTURE_3D, 0, GL_RGB, width, height, depth, 0, GL_RGB, GL_FLOAT, data); |
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171 | break; |
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172 | case 4: |
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173 | glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA, width, height, depth, 0, GL_RGBA, GL_FLOAT, data); |
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174 | break; |
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175 | #endif |
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176 | default: |
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177 | break; |
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178 | } |
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179 | } |
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180 | |
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181 | |
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182 | assert(glGetError()==0); |
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183 | |
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184 | gl_resource_allocated = true; |
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185 | return id; |
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186 | } |
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187 | |
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188 | void Texture3D::activate() |
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189 | { |
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190 | glEnable(GL_TEXTURE_3D); |
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191 | glBindTexture(GL_TEXTURE_3D, id); |
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192 | } |
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193 | |
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194 | void Texture3D::deactivate() |
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195 | { |
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196 | glDisable(GL_TEXTURE_3D); |
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197 | } |
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198 | |
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199 | Texture3D::~Texture3D() |
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200 | { |
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201 | glDeleteTextures(1, &id); |
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202 | } |
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203 | |
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204 | void Texture3D::check_max_size(){ |
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205 | GLint max = 0; |
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206 | glGetIntegerv(GL_MAX_3D_TEXTURE_SIZE_EXT, &max); |
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207 | |
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208 | //printf("%d", glGetError()); |
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209 | fprintf(stderr, "max 3d texture size: %d\n", max); |
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210 | } |
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211 | |
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212 | void Texture3D::check_max_unit(){ |
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213 | int max; |
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214 | glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &max); |
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215 | |
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216 | fprintf(stderr, "max texture units: %d.\n", max); |
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217 | } |
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