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1 #include <iostream>
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2 #include <SDL.h>
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3 #include <SDL_opengl.h>
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4 #include <math.h>
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48
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5 #include <unistd.h>
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6 #include "polygon.h"
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7 //#include "demonstration.h"
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8 //#include "scene.h"
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9 #include "viewer.h"
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10 #include "sys.h"
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11 using namespace std;
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12
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13 #define redMask 0x00ff0000
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14 #define greenMask 0x0000ff00
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15 #define blueMask 0x000000ff
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16 #define alphaMask 0
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17
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18 extern int create_sgp(Polygon *sg, SceneGraphPack *sgp);
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19 extern int update_sgp(SceneGraphPack *sgp, SceneGraphPack *_sgp);
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20 extern int create_pp(SceneGraphPack *sgp, PolygonPack *pp);
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21
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22 Viewer::Viewer(int b, int w, int h)
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23 {
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24 bpp = b;
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25 width = w;
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26 height = h;
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26
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27 }
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28
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29
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30 void Viewer::sdl_init()
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31 {
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32 if( SDL_Init( SDL_INIT_VIDEO ) < 0 )
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33 {
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34 fprintf(stderr,"Couldn't initialize SDL: %s\n",SDL_GetError());
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35 exit( 1 );
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36 }
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37 screen = SDL_SetVideoMode( width, height, bpp, SDL_HWSURFACE );
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38 }
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39
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40
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41 int Viewer::get_ticks()
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42 {
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43 int time;
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44 time = SDL_GetTicks();
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45 return time;
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46 }
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47
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48 bool Viewer::quit_check()
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49 {
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50 bool quit = false;
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51 SDL_Event event;
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52 while(SDL_PollEvent(&event))
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53 {
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54 if(event.type==SDL_QUIT)
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55 {
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56 quit = true;
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57 return quit;
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58 }
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59 }
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60 return quit;
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61 }
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62
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63 void Viewer::quit()
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64 {
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65 SDL_Quit();
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66 }
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67
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68
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69 void Viewer::swap_buffers()
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70 {
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71 SDL_GL_SwapBuffers();
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72 }
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73
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74
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75 void Viewer::write_pixel(int x, int y,float z, Uint32 rgb) {
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76 SDL_PixelFormat *pf;
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77 pf = screen->format;
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78 //printf("x:%d y:%d z:%d\n",x,y,z);
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79
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80 //cout << "write_pixel" << endl;
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81 //cout << x << " " << y << endl;
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82
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83 //cout << SDL_MapRGB(pf,0,0,150) << endl;
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84
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85 x += width/2;
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86 y += height/2;
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87
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88 static int diffz,diffz1;
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89 diffz1 = diffz;
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90 diffz = (zRow[x][y]>z);
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91 if(diffz != diffz1) {
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92 //printf("diffz :%d zRow[%d][%d] = %f z = %f\n",diffz,x,y,zRow[x][y],z);
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93 }
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94 //printf("x:%d,y:%d,z:%f,zRow:%f\n",x,y,z,zRow[x][y]);
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95 if(z < zRow[x][y]) {
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96 // printf("x:%d,y:%d,z:%d\n",x,y,z,zRow);
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97 if(x < width && x > 0 && y > 0 && y < height)
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98 {
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99 //pixels[width*y + x] = SDL_MapRGB(pf,70,70,71);
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100 zRow[x][y] = z;
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101 y = height - y;
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102 pixels[width*y + x] = rgb;
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103 }
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104 }
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105 }
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106
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107 void Viewer::write_line(float x1, float y1, float x2, float y2, Uint32 rgb)
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108 {
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109 //cout << "write_line("<< x1 << "," << y1 << "," << x2 << "," << y2 << ")"<< endl;
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110
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111 //Uint32 rgb = 9830400;
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112
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113 if(x1 > x2)
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114 {
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115 float x=0;
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116 float y=0;
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117 x=x1;
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118 y=y1;
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119 x1 = x2;
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120 y1 = y2;
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121 x2 = x;
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122 y2 = y;
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123 }
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124 float s = y1;
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125
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126 if((int)x1 == (int)x2)
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127 {
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128 if(y1 > y2)
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129 {
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130 float y=0;
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131 y = y1;
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132 y1 = y2;
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133 y2 = y;
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134 }
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135 for(float i=y1; i<y2; i++)
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136 {
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137 //write_pixel((int)x1,(int)i);
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138 write_pixel((int)x1,(int)i,0,rgb);
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139 }
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140 }
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141 else
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142 {
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143 float t = (y2 - y1)/(x2 - x1);
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144 if(t < -1)
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145 {
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146 float f = 0;
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147 for(float i=x1; i<x2; i++)
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148 {
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149 for(float a=(int)t; a<0; a++)
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150 {
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151 //write_pixel((int)i,(int)s);
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152 write_pixel((int)i,(int)s,0,rgb);
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153 s--;
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154 }
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155 f += t-(int)t;
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156 if(f <= -1)
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157 {
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158 //write_pixel((int)i,(int)s);
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159 write_pixel((int)i,(int)s,0,rgb);
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160 f = 0;
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161 s--;
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162 }
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163 }
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164 }
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165 else if(t <= 1)
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166 {
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167 for(float i=x1; i<x2; i++)
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168 {
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169 //write_pixel((int)i,(int)s);
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170 write_pixel((int)i,(int)s,0,rgb);
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171 s += t;
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172 }
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173 }
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174 else
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175 {
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176 float f = 0;
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177 for(float i=x1; i<x2; i++)
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178 {
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179 for(float a=0; a<(int)t; a++)
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180 {
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181 //write_pixel((int)i,(int)s);
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182 write_pixel((int)i,(int)s,0,rgb);
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183 s++;
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184 }
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185 f += t-(int)t;
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186 if(f >= 1)
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187 {
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188 //write_pixel((int)i,(int)s);
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189 write_pixel((int)i,(int)s,0,rgb);
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190 f = 0;
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191 s++;
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192 }
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193 }
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194 }
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195 }
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196 }
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197
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198 void Viewer::write_triangle(float x1, float y1, float x2, float y2, float x3, float y3, Uint32 rgb)
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199 {
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200 write_line(x1,y1,x2,y2,rgb);
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201 write_line(x2,y2,x3,y3,rgb);
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202 write_line(x3,y3,x1,y1,rgb);
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203 }
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204
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205 void Viewer::clean_pixels()
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206 {
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207 for(int i=0; i<width*height; i++)
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208 {
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209 pixels[i] = 0x00;
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210 }
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211 }
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212
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213 void Viewer::graph_line()
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214 {
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215 int xl = width*height/2;
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216 int yl = width/2;
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217 for(int i=0; i<width; i++)
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218 {
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219 for(int t=0; t<height; t+=20)
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220 {
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221 pixels[width*t+i] = 0x5a;
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222 }
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223 pixels[xl +i] = 0xff;
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224 }
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225 for(int i=0; i<height; i++)
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226 {
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227 for(int t=0; t<width; t+=20)
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228 {
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229 pixels[i*width+t] = 0x5a;
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230 }
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231 pixels[i*width+yl] = 0xff;
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232 }
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233 }
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234
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235
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236 struct run_arg_t {
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237 int start_time;
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238 int this_time;
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239 int frames;
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240 SDL_Surface *bitmap;
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241 SDL_PixelFormat *pf;
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242 Uint32 background;
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243 Polygon *p;
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244 SceneGraphPack *sgp;
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245 PolygonPack *pp;
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246 };
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247
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248 struct run_arg_t *arg;
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249
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250 void
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251 Viewer::run_init()
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252 {
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253 arg = new run_arg_t;
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254 HTaskPtr task;
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255 int fd;
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256
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257 arg->start_time = get_ticks();
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258 arg->pf = screen->format;
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259 arg->background = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
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260 arg->p = new Polygon;
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261 arg->p->set_data("cube.xml");
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262 arg->p->viewer = this;
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263 arg->sgp = new SceneGraphPack;
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264 create_sgp(arg->p, arg->sgp);
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265 arg->pp = new PolygonPack;
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266
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267 pixels = new Uint32[width*height];
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268
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269 graph_line();
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270
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271 arg->bitmap = SDL_CreateRGBSurfaceFrom((void *)pixels, width, height, 32,
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272 width*4, redMask, greenMask,
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273 blueMask, alphaMask);
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274
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275 fd = manager->open("ViewerRunLoop");
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276 task = manager->create_task(fd, 0, 0, 0, NULL);
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277 manager->spawn_task(task);
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278 }
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279
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280 void
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281 Viewer::run_loop(void)
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282 {
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283 HTaskPtr task_update_sgp = NULL;
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284 HTaskPtr task_create_pp = NULL;
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285 HTaskPtr task_finish = NULL;
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286 int fd_update_sgp;
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287 int fd_create_pp;
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288 int fd_finish;
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289
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290 HTaskPtr task;
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291 int fd;
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292
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293 if (quit_check()) {
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294 arg->this_time = get_ticks();
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295 fd_finish = manager->open("ViewerRunFinish");
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296 task_finish = manager->create_task(fd_finish, 0, 0, 0, NULL);
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297 manager->spawn_task(task_finish);
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298 return;
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299 }
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300
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301 clean_pixels();
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302
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303 zRow_init();
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304 graph_line();
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305
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306 fd_update_sgp = manager->open("UpdateSGP");
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307 fd_create_pp = manager->open("CreatePP");
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308 fd = manager->open("ViewerRunDraw");
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309 task_update_sgp = manager->create_task(fd_update_sgp,
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310 sizeof(SceneGraphPack),
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311 (unsigned int)arg->sgp,
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312 (unsigned int)arg->sgp,
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313 NULL);
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314 task_create_pp = manager->create_task(fd_create_pp,
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315 sizeof(SceneGraphPack),
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316 (unsigned int)arg->sgp,
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317 (unsigned int)arg->pp,
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318 NULL);
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319 task = manager->create_task(fd, 0, 0, 0, NULL);
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320
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321 manager->set_task_depend(task_update_sgp, task);
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322 manager->set_task_depend(task_create_pp, task);
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323
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324 manager->spawn_task(task_update_sgp);
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325 manager->spawn_task(task_create_pp);
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326 manager->spawn_task(task);
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327 }
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328
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329 void
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330 Viewer::run_draw(void)
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331 {
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332 HTaskPtr task;
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333 int fd;
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334
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335 arg->p->draw(arg->pp); // test draw of PolygonPack
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336
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337 SDL_BlitSurface(arg->bitmap, NULL, screen, NULL);
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338 SDL_UpdateRect(screen, 0, 0, 0, 0);
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339
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340 //swap_buffers();
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341 arg->frames++;
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342
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343 fd = manager->open("ViewerRunLoop");
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344 task = manager->create_task(fd, 0, 0, 0, NULL);
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345 manager->spawn_task(task);
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346 }
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347
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348 void
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349 Viewer::run_finish(void)
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350 {
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351 if (arg->this_time != arg->start_time) {
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352 cout<< ((float)arg->frames/(arg->this_time-arg->start_time))*1000.0 << " FPS\n";
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353 }
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354
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355 SDL_FreeSurface(arg->bitmap);
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356 delete [] pixels;
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357 arg->p->delete_data();
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358 delete arg->p;
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359 delete arg->sgp;
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360 delete arg->pp;
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361 quit();
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362
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363 delete arg;
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364 }
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365
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366 void
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367 Viewer::zRow_init()
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368 {
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369 for (int i = 0; i < width; i++) {
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370 for (int j = 0; j < height; j++) {
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371 zRow[i][j] = 65535;
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372 }
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373 }
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374 }
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