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nuclear@4
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1 #include <stdio.h>
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nuclear@4
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2 #include <string.h>
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3 #include "vr.h"
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4 #include "vr_impl.h"
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5
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6
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nuclear@8
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7 static void swap_buffers(void);
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8
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9
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10 static struct vr_module *vrm;
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11 static float idmat[] = {
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12 1, 0, 0, 0,
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13 0, 1, 0, 0,
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14 0, 0, 1, 0,
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15 0, 0, 0, 1
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16 };
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17 static float fbtex_rect[] = {
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18 0, 0, 1, 1
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19 };
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20
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21 int vr_init(void)
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22 {
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23 int i, nmodules;
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24
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25 if(vrm) {
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26 vr_shutdown();
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27 }
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28
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29 vr_init_modules();
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30
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31 nmodules = vr_get_num_modules();
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32 for(i=0; i<nmodules; i++) {
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33 struct vr_module *m = vr_get_module(i);
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34 if(m->init() != -1) {
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35 /* add to the active modules array */
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36 vr_activate_module(i);
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37 if(!vrm) {
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38 vr_use_module(0);
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39 }
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40 }
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41 }
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42
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43 if(!vrm) {
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44 return -1;
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45 }
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46 return 0;
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47 }
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48
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49 void vr_shutdown(void)
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50 {
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51 vr_clear_modules();
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52 vrm = 0;
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53 fbtex_rect[0] = fbtex_rect[1] = 0;
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54 fbtex_rect[2] = fbtex_rect[3] = 1;
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55 }
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56
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57 int vr_module_count(void)
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58 {
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59 return vr_get_num_active_modules();
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60 }
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61
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62 const char *vr_module_name(int idx)
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63 {
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64 struct vr_module *m = vr_get_active_module(idx);
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65 if(!m) {
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66 return 0;
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67 }
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68 return m->name;
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69 }
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70
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71 int vr_use_module(int idx)
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72 {
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73 if(idx >= 0 && idx < vr_get_num_active_modules()) {
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74 vrm = vr_get_active_module(idx);
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75 printf("using vr module: %s\n", vrm->name);
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76 return 0;
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77 }
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78 return -1;
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79 }
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80
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81 int vr_use_module_named(const char *name)
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82 {
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83 int i, count = vr_get_num_active_modules();
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84
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85 for(i=0; i<count; i++) {
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86 struct vr_module *m = vr_get_active_module(i);
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87 if(strcmp(m->name, name) == 0) {
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88 return vr_use_module(i);
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89 }
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90 }
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91 return -1;
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92 }
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93
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nuclear@7
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94 void vr_set_opti(const char *optname, int val)
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95 {
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96 if(vrm && vrm->set_option) {
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97 vrm->set_option(optname, OTYPE_INT, &val);
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98 }
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99 }
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100
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101 void vr_set_optf(const char *optname, float val)
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102 {
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103 if(vrm && vrm->set_option) {
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104 vrm->set_option(optname, OTYPE_FLOAT, &val);
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105 }
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106 }
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107
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108 int vr_get_opti(const char *optname)
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109 {
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110 int res = 0;
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111
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112 if(vrm && vrm->get_option) {
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113 vrm->get_option(optname, OTYPE_INT, &res);
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114 }
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115 return res;
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116 }
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117
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118 float vr_get_optf(const char *optname)
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119 {
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120 float res = 0.0f;
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121
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122 if(vrm && vrm->get_option) {
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123 vrm->get_option(optname, OTYPE_FLOAT, &res);
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124 }
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125 return res;
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126 }
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127
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128
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129 int vr_view_translation(int eye, float *vec)
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130 {
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131 if(vrm && vrm->translation) {
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132 vrm->translation(eye, vec);
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133 return 0;
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134 }
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135 vec[0] = vec[1] = vec[2] = 0.0f;
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136 return -1;
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137 }
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138
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139 int vr_view_rotation(int eye, float *quat)
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140 {
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141 if(vrm && vrm->rotation) {
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142 vrm->rotation(eye, quat);
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143 return 0;
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144 }
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145 quat[0] = quat[1] = quat[2] = 0.0f;
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146 quat[3] = 1.0f;
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147 return -1;
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148 }
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149
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150 int vr_view_matrix(int eye, float *mat)
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151 {
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152 /* TODO combine vr_view_translation and vr_view_rotation */
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153 return 0;
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154 }
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155
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156 int vr_proj_matrix(int eye, float znear, float zfar, float *mat)
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157 {
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158 if(vrm && vrm->proj_matrix) {
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159 vrm->proj_matrix(eye, znear, zfar, mat);
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160 return 1;
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161 }
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162 memcpy(mat, idmat, sizeof idmat);
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163 return 0;
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164 }
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165
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166 void vr_begin(int eye)
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167 {
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168 if(vrm && vrm->begin) {
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169 vrm->begin(eye);
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170 }
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171 }
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172
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173 void vr_end(void)
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174 {
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175 if(vrm && vrm->end) {
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176 vrm->end();
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177 }
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178 }
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179
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180 int vr_swap_buffers(void)
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181 {
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182 int res = 0;
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183
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184 if(vrm && vrm->present) {
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185 res = vrm->present();
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186 }
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187
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188 if(!res) {
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189 swap_buffers();
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190 }
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191 return 0;
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192 }
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193
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nuclear@7
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194 void vr_output_texture(unsigned int tex, float umin, float vmin, float umax, float vmax)
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195 {
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196 float halfu = (umax + umin) * 0.5f;
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197
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198 vr_output_texture_eye(VR_EYE_LEFT, tex, umin, vmin, halfu, vmax);
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199 vr_output_texture_eye(VR_EYE_RIGHT, tex, halfu, vmin, umax, vmax);
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200 }
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201
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202 void vr_output_texture_eye(int eye, unsigned int tex, float umin, float vmin, float umax, float vmax)
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203 {
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204 if(vrm && vrm->set_eye_texture) {
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205 vrm->set_eye_texture(eye, tex, umin, vmin, umax, vmax);
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206 }
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207 }
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208
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209 void vr_recenter(void)
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210 {
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211 if(vrm && vrm->recenter) {
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212 vrm->recenter();
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213 }
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214 }
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215
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216
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217 #ifdef __unix__
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218 #include <GL/glx.h>
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219
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220 static void swap_buffers(void)
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221 {
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222 glXSwapBuffers(glXGetCurrentDisplay(), glXGetCurrentDrawable());
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223 }
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224
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225 #endif
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226
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227 #ifdef WIN32
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228 #include <windows.h>
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229
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230 static void swap_buffers(void)
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231 {
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232 SwapBuffers(wglGetCurrentDC());
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233 }
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234 #endif
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