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nuclear@1
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1 #include <stdio.h>
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2 #include <stdlib.h>
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3 #include <assert.h>
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4 #include <imago2.h>
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5 #include "opengl.h"
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6 #include "resman.h"
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7 #include "thumbs.h"
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8
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9 static int init(void);
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10 static void cleanup(void);
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11 static void display(void);
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12 /*static void idle(void);*/
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13 static void reshape(int x, int y);
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14 static void keyb(unsigned char key, int x, int y);
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15 static void mouse(int bn, int st, int x, int y);
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16 static void motion(int x, int y);
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17 static void sball_motion(int x, int y, int z);
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18 static struct thumbnail *find_thumb(int x, int y);
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19
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20 const char *path = ".";
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21 int win_width, win_height;
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22 float win_aspect;
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23 float pan_x, pan_y;
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24 float show_pan_x, show_pan_y;
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25 float show_zoom = 1.0;
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26 float thumbs_size = 0.25;
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27
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28 struct thumbnail *thumbs, *show_thumb;
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29
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30 int main(int argc, char **argv)
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31 {
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32 glutInitWindowSize(1024, 768);
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33 glutInit(&argc, argv);
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34
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35 if(argv[1]) {
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36 path = argv[1];
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37 }
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38
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39 glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
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40 glutCreateWindow("imgthumbs");
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41
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42 glutDisplayFunc(display);
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43 glutIdleFunc(glutPostRedisplay);
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44 glutReshapeFunc(reshape);
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45 glutKeyboardFunc(keyb);
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46 glutMouseFunc(mouse);
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47 glutMotionFunc(motion);
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48 glutSpaceballMotionFunc(sball_motion);
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49
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50 if(init() == -1) {
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51 return 1;
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52 }
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53 atexit(cleanup);
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54
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55 glutMainLoop();
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56 return 0;
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57 }
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58
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59 static int init(void)
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60 {
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61 thumbs = create_thumbs(path);
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62 return 0;
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63 }
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64
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65 static void cleanup(void)
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66 {
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67 free_thumbs(thumbs);
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68 }
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69
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70 static void display(void)
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71 {
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72 update_thumbs();
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73
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74 glClear(GL_COLOR_BUFFER_BIT);
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75
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76 glMatrixMode(GL_MODELVIEW);
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77 glLoadIdentity();
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78
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79 if(show_thumb) {
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80 glEnable(GL_TEXTURE_2D);
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81 glBindTexture(GL_TEXTURE_2D, show_thumb->tex);
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82
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83 glScalef(show_zoom, show_zoom, 1);
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84 glTranslatef(2.0 * show_pan_x, 2.0 * show_pan_y, 0);
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85 if(show_thumb->aspect >= win_aspect) {
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86 glScalef(1, 1.0 / show_thumb->aspect, 1);
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87 } else {
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88 glScalef(show_thumb->aspect / win_aspect, 1.0 / win_aspect, 1);
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89 }
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90
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91 glBegin(GL_QUADS);
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92 glColor3f(1, 1, 1);
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93 glTexCoord2f(0, 0); glVertex2f(-1, -1);
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94 glTexCoord2f(1, 0); glVertex2f(1, -1);
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95 glTexCoord2f(1, 1); glVertex2f(1, 1);
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96 glTexCoord2f(0, 1); glVertex2f(-1, 1);
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97 glEnd();
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98
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99 glDisable(GL_TEXTURE_2D);
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100 } else {
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101 draw_thumbs(thumbs, thumbs_size, pan_y);
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102 }
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103
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104 glutSwapBuffers();
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105 assert(glGetError() == GL_NO_ERROR);
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106 }
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107
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108 /*
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109 static void idle(void)
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110 {
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111 glutPostRedisplay();
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112 }
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113 */
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114
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115 static void reshape(int x, int y)
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116 {
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117 win_aspect = (float)x / (float)y;
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118
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119 glViewport(0, 0, x, y);
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120
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121 glMatrixMode(GL_PROJECTION);
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122 glLoadIdentity();
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123 glOrtho(-1, 1, 1.0 / win_aspect, -1.0 / win_aspect, -1, 1);
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124
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125 win_width = x;
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126 win_height = y;
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127 }
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128
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129 static void keyb(unsigned char key, int x, int y)
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130 {
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131 switch(key) {
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132 case 27:
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133 if(show_thumb) {
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134 show_thumb = 0;
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135 glutPostRedisplay();
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136 } else {
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137 exit(0);
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138 }
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139 break;
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140
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141 case ' ':
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142 show_zoom = 1.0;
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143 thumbs_size = 0.25;
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144 pan_x = pan_y = show_pan_x = show_pan_y = 0;
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145 glutPostRedisplay();
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146 break;
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147 }
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148 }
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149
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150 static int bnstate[32];
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151 static int prev_x, prev_y;
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152 static int click_x[32], click_y[32];
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153
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154 static void mouse(int bn, int st, int x, int y)
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155 {
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156 int bidx = bn - GLUT_LEFT_BUTTON;
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157 int state = st == GLUT_DOWN ? 1 : 0;
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158
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159 bnstate[bidx] = state;
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160
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161 prev_x = x;
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162 prev_y = y;
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163
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164 if(state) {
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165 click_x[bidx] = x;
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166 click_y[bidx] = y;
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167 } else {
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168 int is_drag = abs(x - click_x[bidx]) > 3 || abs(y - click_y[bidx]) > 3;
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169
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170 if(bidx == 0) {
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171 if(!show_thumb) {
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172 if(!is_drag) {
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173 struct thumbnail *sel = find_thumb(x, y);
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174 if(sel) {
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175 show_thumb = sel;
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176 show_pan_x = show_pan_y = 0;
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177 glutPostRedisplay();
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178 }
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179 }
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180 }
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181 } else {
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182 if(!is_drag) {
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183 show_thumb = 0;
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184 glutPostRedisplay();
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185 }
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186 }
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187 }
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188 }
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189
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190 static void motion(int x, int y)
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191 {
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192 int dx = x - prev_x;
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193 int dy = y - prev_y;
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194 prev_x = x;
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195 prev_y = y;
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196
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197 if(!dx && !dy) return;
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198
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199 if(bnstate[0]) {
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200 float fdx = dx / (float)win_width;
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201 float fdy = dy / (float)win_height / win_aspect;
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202
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203 if(show_thumb) {
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204 show_pan_x += fdx / show_zoom;
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205 show_pan_y += fdy / show_zoom;
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206 } else {
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207 pan_x += fdx;
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208 pan_y += fdy;
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209 }
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210 glutPostRedisplay();
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211 }
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212
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213 if(bnstate[2]) {
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214 if(show_thumb) {
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215 show_zoom -= dy * 0.0075;
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216 if(show_zoom <= 0) show_zoom = 0;
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217 } else {
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218 thumbs_size -= dy * 0.005;
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219 if(thumbs_size <= 0.01) thumbs_size = 0.01;
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220 }
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221 glutPostRedisplay();
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222 }
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223 }
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224
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225 static void sball_motion(int x, int y, int z)
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226 {
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227 float fx = -x * 0.0004;
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228 float fy = z * 0.0004;
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229 float fz = -y * 0.0005;
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230
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231 if(show_thumb) {
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232 show_pan_x += fx / show_zoom;
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233 show_pan_y += fy / show_zoom;
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234 show_zoom += fz;
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235 if(show_zoom <= 0) show_zoom = 0;
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236 } else {
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237 pan_x += fx;
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238 pan_y += fy;
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239 thumbs_size += fz;
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240 if(thumbs_size <= 0.01) thumbs_size = 0.01;
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241 }
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242 glutPostRedisplay();
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243 }
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244
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245 static struct thumbnail *find_thumb(int x, int y)
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246 {
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247 float fx = (float)x / (float)win_width;
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248 float fy = (float)y / (float)win_height / win_aspect;
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249 struct thumbnail *node;
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250
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251 node = thumbs;
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252 while(node) {
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253 float nx = node->layout_pos[0];
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254 float ny = node->layout_pos[1];
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255
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256 if(fx >= nx && fx < nx + node->layout_size[0] &&
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257 fy >= ny && fy < ny + node->layout_size[1]) {
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258 return node;
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259 }
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260 node = node->next;
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261 }
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262 return 0;
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263 }
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