Mercurial > sdl-ios-xcode
annotate test/testintersections.c @ 4567:1d7ea8724f4a
Daniel Wyatt to slouken
I also found a bug in the non-printable character fix.
In SDL_keyboard.c:SDL_SendKeyboardText:
if (*text < ' ' || *text == 127) {
needs to be:
if ((unsigned char)*text < ' ' || *text == 127) {
Otherwise bytes >= 128 will be considered non-printable.
| author | Sam Lantinga <slouken@libsdl.org> |
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| date | Thu, 22 Jul 2010 22:09:04 -0700 |
| parents | 3e69e077cb95 |
| children | e743b9c3f6d6 |
| rev | line source |
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1 |
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2 /* Simple program: draw as many random objects on the screen as possible */ |
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3 |
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4 #include <stdlib.h> |
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5 #include <stdio.h> |
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6 #include <time.h> |
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7 |
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8 #include "common.h" |
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9 |
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10 #define SWAP(typ,a,b) do{typ t=a;a=b;b=t;}while(0) |
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11 #define NUM_OBJECTS 100 |
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12 |
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13 static CommonState *state; |
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14 static int num_objects; |
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15 static SDL_bool cycle_color; |
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16 static SDL_bool cycle_alpha; |
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17 static int cycle_direction = 1; |
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18 static int current_alpha = 255; |
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19 static int current_color = 255; |
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20 static SDL_BlendMode blendMode = SDL_BLENDMODE_NONE; |
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21 |
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22 void |
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23 DrawPoints(SDL_Window * window) |
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24 { |
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25 int i; |
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26 int x, y; |
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27 int window_w, window_h; |
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28 |
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29 /* Query the sizes */ |
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30 SDL_GetWindowSize(window, &window_w, &window_h); |
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31 |
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32 SDL_SetRenderDrawBlendMode(blendMode); |
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33 for (i = 0; i < num_objects * 4; ++i) { |
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34 /* Cycle the color and alpha, if desired */ |
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35 if (cycle_color) { |
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36 current_color += cycle_direction; |
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37 if (current_color < 0) { |
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38 current_color = 0; |
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39 cycle_direction = -cycle_direction; |
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40 } |
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41 if (current_color > 255) { |
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42 current_color = 255; |
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43 cycle_direction = -cycle_direction; |
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44 } |
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45 } |
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46 if (cycle_alpha) { |
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47 current_alpha += cycle_direction; |
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48 if (current_alpha < 0) { |
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49 current_alpha = 0; |
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50 cycle_direction = -cycle_direction; |
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51 } |
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52 if (current_alpha > 255) { |
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53 current_alpha = 255; |
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54 cycle_direction = -cycle_direction; |
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55 } |
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56 } |
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57 SDL_SetRenderDrawColor(255, (Uint8) current_color, |
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58 (Uint8) current_color, (Uint8) current_alpha); |
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59 |
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60 x = rand() % window_w; |
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61 y = rand() % window_h; |
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62 SDL_RenderDrawPoint(x, y); |
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63 } |
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64 SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE); |
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65 } |
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66 |
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67 #define MAX_LINES 16 |
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68 int num_lines = 0; |
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69 SDL_Rect lines[MAX_LINES]; |
| 2997 | 70 static int |
| 71 add_line(int x1, int y1, int x2, int y2) | |
| 72 { | |
| 73 if (num_lines >= MAX_LINES) | |
| 74 return 0; | |
| 75 if ((x1 == x2) && (y1 == y2)) | |
| 76 return 0; | |
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77 |
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78 printf("adding line (%d, %d), (%d, %d)\n", x1, y1, x2, y2); |
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79 lines[num_lines].x = x1; |
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80 lines[num_lines].y = y1; |
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81 lines[num_lines].w = x2; |
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82 lines[num_lines].h = y2; |
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83 |
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84 return ++num_lines; |
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85 } |
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86 |
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87 |
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88 void |
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89 DrawLines(SDL_Window * window) |
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90 { |
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91 int i; |
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92 int x1, y1, x2, y2; |
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93 int window_w, window_h; |
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94 |
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95 /* Query the sizes */ |
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96 SDL_GetWindowSize(window, &window_w, &window_h); |
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97 |
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98 SDL_SetRenderDrawBlendMode(blendMode); |
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99 for (i = 0; i < num_lines; ++i) { |
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100 SDL_SetRenderDrawColor(255, 255, 255, 255); |
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101 |
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102 if (i == -1) { |
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103 SDL_RenderDrawLine(0, 0, window_w - 1, window_h - 1); |
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104 SDL_RenderDrawLine(0, window_h - 1, window_w - 1, 0); |
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105 SDL_RenderDrawLine(0, window_h / 2, window_w - 1, window_h / 2); |
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106 SDL_RenderDrawLine(window_w / 2, 0, window_w / 2, window_h - 1); |
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107 } else { |
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108 SDL_RenderDrawLine(lines[i].x, lines[i].y, lines[i].w, lines[i].h); |
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109 } |
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110 } |
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111 SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE); |
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112 } |
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113 |
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114 #define MAX_RECTS 16 |
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115 int num_rects = 0; |
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116 SDL_Rect rects[MAX_RECTS]; |
| 2997 | 117 static int |
| 118 add_rect(int x1, int y1, int x2, int y2) | |
| 119 { | |
| 120 if (num_rects >= MAX_RECTS) | |
| 121 return 0; | |
| 122 if ((x1 == x2) || (y1 == y2)) | |
| 123 return 0; | |
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124 |
| 2997 | 125 if (x1 > x2) |
| 126 SWAP(int, x1, x2); | |
| 127 if (y1 > y2) | |
| 128 SWAP(int, y1, y2); | |
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129 |
| 2997 | 130 printf("adding rect (%d, %d), (%d, %d) [%dx%d]\n", x1, y1, x2, y2, |
| 131 x2 - x1, y2 - y1); | |
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132 |
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133 rects[num_rects].x = x1; |
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134 rects[num_rects].y = y1; |
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135 rects[num_rects].w = x2 - x1; |
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136 rects[num_rects].h = y2 - y1; |
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137 |
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138 return ++num_rects; |
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139 } |
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140 |
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141 static void |
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142 DrawRects(SDL_Window * window) |
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143 { |
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144 int i; |
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145 int window_w, window_h; |
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146 |
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147 /* Query the sizes */ |
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148 SDL_GetWindowSize(window, &window_w, &window_h); |
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149 |
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150 SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE); |
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151 for (i = 0; i < num_rects; ++i) { |
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152 SDL_SetRenderDrawColor(255, 127, 0, 255); |
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153 SDL_RenderFillRect(&rects[i]); |
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154 } |
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155 SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE); |
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156 } |
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157 |
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158 static void |
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159 DrawRectLineIntersections(SDL_Window * window) |
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160 { |
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161 int i, j, window_w, window_h; |
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162 |
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163 /* Query the sizes */ |
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164 SDL_GetWindowSize(window, &window_w, &window_h); |
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165 |
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166 SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE); |
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167 |
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168 for (i = 0; i < num_rects; i++) |
| 2997 | 169 for (j = 0; j < num_lines; j++) { |
| 170 int x1, y1, x2, y2; | |
| 171 SDL_Rect r; | |
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172 |
| 2997 | 173 r = rects[i]; |
| 174 x1 = lines[j].x; | |
| 175 y1 = lines[j].y; | |
| 176 x2 = lines[j].w; | |
| 177 y2 = lines[j].h; | |
| 178 | |
| 179 if (SDL_IntersectRectAndLine(&r, &x1, &y1, &x2, &y2)) { | |
| 180 SDL_SetRenderDrawColor(0, 255, 55, 255); | |
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181 SDL_RenderDrawLine(x1, y1, x2, y2); |
| 2997 | 182 } |
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183 } |
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184 |
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185 SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE); |
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186 } |
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187 |
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188 static void |
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189 DrawRectRectIntersections(SDL_Window * window) |
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190 { |
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191 int i, j; |
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192 |
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193 SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE); |
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194 |
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195 for (i = 0; i < num_rects; i++) |
| 2997 | 196 for (j = i + 1; j < num_rects; j++) { |
| 197 SDL_Rect r; | |
| 198 if (SDL_IntersectRect(&rects[i], &rects[j], &r)) { | |
| 199 SDL_SetRenderDrawColor(255, 200, 0, 255); | |
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200 SDL_RenderFillRect(&r); |
| 2997 | 201 } |
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202 } |
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203 |
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204 SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE); |
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205 } |
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206 |
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207 int |
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208 main(int argc, char *argv[]) |
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209 { |
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210 int mouse_begin_x = -1, mouse_begin_y = -1; |
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211 int i, done; |
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212 SDL_Event event; |
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213 Uint32 then, now, frames; |
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214 |
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215 /* Initialize parameters */ |
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216 num_objects = NUM_OBJECTS; |
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217 |
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218 /* Initialize test framework */ |
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219 state = CommonCreateState(argv, SDL_INIT_VIDEO); |
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220 if (!state) { |
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221 return 1; |
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222 } |
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223 for (i = 1; i < argc;) { |
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224 int consumed; |
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225 |
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226 consumed = CommonArg(state, i); |
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227 if (consumed == 0) { |
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228 consumed = -1; |
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229 if (SDL_strcasecmp(argv[i], "--blend") == 0) { |
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230 if (argv[i + 1]) { |
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231 if (SDL_strcasecmp(argv[i + 1], "none") == 0) { |
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232 blendMode = SDL_BLENDMODE_NONE; |
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233 consumed = 2; |
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234 } else if (SDL_strcasecmp(argv[i + 1], "mask") == 0) { |
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235 blendMode = SDL_BLENDMODE_MASK; |
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236 consumed = 2; |
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237 } else if (SDL_strcasecmp(argv[i + 1], "blend") == 0) { |
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238 blendMode = SDL_BLENDMODE_BLEND; |
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239 consumed = 2; |
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240 } else if (SDL_strcasecmp(argv[i + 1], "add") == 0) { |
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241 blendMode = SDL_BLENDMODE_ADD; |
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242 consumed = 2; |
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243 } else if (SDL_strcasecmp(argv[i + 1], "mod") == 0) { |
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244 blendMode = SDL_BLENDMODE_MOD; |
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245 consumed = 2; |
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246 } |
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247 } |
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248 } else if (SDL_strcasecmp(argv[i], "--cyclecolor") == 0) { |
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249 cycle_color = SDL_TRUE; |
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250 consumed = 1; |
|
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251 } else if (SDL_strcasecmp(argv[i], "--cyclealpha") == 0) { |
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252 cycle_alpha = SDL_TRUE; |
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253 consumed = 1; |
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254 } else if (SDL_isdigit(*argv[i])) { |
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255 num_objects = SDL_atoi(argv[i]); |
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256 consumed = 1; |
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257 } |
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258 } |
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259 if (consumed < 0) { |
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260 fprintf(stderr, |
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261 "Usage: %s %s [--blend none|mask|blend|add|mod] [--cyclecolor] [--cyclealpha]\n", |
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262 argv[0], CommonUsage(state)); |
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263 return 1; |
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264 } |
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265 i += consumed; |
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266 } |
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267 if (!CommonInit(state)) { |
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268 return 2; |
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269 } |
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270 |
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271 /* Create the windows and initialize the renderers */ |
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272 for (i = 0; i < state->num_windows; ++i) { |
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273 SDL_SelectRenderer(state->windows[i]); |
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274 SDL_SetRenderDrawColor(0xA0, 0xA0, 0xA0, 0xFF); |
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275 SDL_RenderClear(); |
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276 } |
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277 |
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278 srand(time(NULL)); |
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279 |
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280 /* Main render loop */ |
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281 frames = 0; |
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282 then = SDL_GetTicks(); |
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283 done = 0; |
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284 while (!done) { |
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285 /* Check for events */ |
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286 ++frames; |
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287 while (SDL_PollEvent(&event)) { |
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288 CommonEvent(state, &event, &done); |
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289 switch (event.type) { |
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290 case SDL_MOUSEBUTTONDOWN: |
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291 mouse_begin_x = event.button.x; |
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292 mouse_begin_y = event.button.y; |
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293 break; |
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294 case SDL_MOUSEBUTTONUP: |
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295 if (event.button.button == 3) |
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296 add_line(mouse_begin_x, mouse_begin_y, event.button.x, |
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297 event.button.y); |
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298 if (event.button.button == 1) |
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299 add_rect(mouse_begin_x, mouse_begin_y, event.button.x, |
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300 event.button.y); |
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301 break; |
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302 case SDL_KEYDOWN: |
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303 switch (event.key.keysym.sym) { |
| 2997 | 304 case 'l': |
| 305 if (event.key.keysym.mod & KMOD_SHIFT) | |
| 306 num_lines = 0; | |
| 307 else | |
| 308 add_line(rand() % 640, rand() % 480, rand() % 640, | |
| 309 rand() % 480); | |
| 310 break; | |
| 311 case 'r': | |
| 312 if (event.key.keysym.mod & KMOD_SHIFT) | |
| 313 num_rects = 0; | |
| 314 else | |
| 315 add_rect(rand() % 640, rand() % 480, rand() % 640, | |
| 316 rand() % 480); | |
| 317 break; | |
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318 } |
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319 break; |
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320 case SDL_WINDOWEVENT: |
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321 switch (event.window.event) { |
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322 case SDL_WINDOWEVENT_EXPOSED: |
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323 SDL_SelectRenderer(SDL_GetWindowFromID(event.window.windowID)); |
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324 SDL_SetRenderDrawColor(0xA0, 0xA0, 0xA0, 0xFF); |
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325 SDL_RenderClear(); |
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326 break; |
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327 } |
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328 break; |
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329 default: |
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330 break; |
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331 } |
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332 } |
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333 for (i = 0; i < state->num_windows; ++i) { |
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334 SDL_SelectRenderer(state->windows[i]); |
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335 SDL_SetRenderDrawColor(0xA0, 0xA0, 0xA0, 0xFF); |
|
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336 SDL_RenderClear(); |
|
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337 |
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338 DrawRects(state->windows[i]); |
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339 DrawPoints(state->windows[i]); |
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340 DrawRectRectIntersections(state->windows[i]); |
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341 DrawLines(state->windows[i]); |
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342 DrawRectLineIntersections(state->windows[i]); |
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343 |
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344 SDL_RenderPresent(); |
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345 } |
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346 } |
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347 |
|
3371
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348 CommonQuit(state); |
|
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349 |
|
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350 /* Print out some timing information */ |
|
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351 now = SDL_GetTicks(); |
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352 if (now > then) { |
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353 double fps = ((double) frames * 1000) / (now - then); |
|
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354 printf("%2.2f frames per second\n", fps); |
|
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355 } |
|
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356 return 0; |
|
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357 } |
|
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358 |
|
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359 /* vi: set ts=4 sw=4 expandtab: */ |