Mercurial > sdl-ios-xcode
annotate test/testdraw2.c @ 3389:3fe2248fde37
Fixed OpenGL ES primitive alpha blending.
| author | Mike Gorchak <lestat@i.com.ua> |
|---|---|
| date | Tue, 13 Oct 2009 06:28:31 +0000 |
| parents | 438ba87e9578 |
| children | 0267b8b1595c |
| rev | line source |
|---|---|
| 2901 | 1 |
| 2 /* Simple program: draw as many random objects on the screen as possible */ | |
| 3 | |
| 4 #include <stdlib.h> | |
| 5 #include <stdio.h> | |
| 6 #include <time.h> | |
| 7 | |
| 8 #include "common.h" | |
| 9 | |
| 10 #define NUM_OBJECTS 100 | |
| 11 | |
| 12 static CommonState *state; | |
| 13 static int num_objects; | |
| 14 static SDL_bool cycle_color; | |
| 15 static SDL_bool cycle_alpha; | |
| 16 static int cycle_direction = 1; | |
| 17 static int current_alpha = 255; | |
| 18 static int current_color = 255; | |
| 19 static SDL_BlendMode blendMode = SDL_BLENDMODE_NONE; | |
| 20 | |
| 21 void | |
| 22 DrawPoints(SDL_WindowID window) | |
| 23 { | |
| 24 int i; | |
| 25 int x, y; | |
| 26 int window_w, window_h; | |
| 27 | |
| 28 /* Query the sizes */ | |
| 29 SDL_GetWindowSize(window, &window_w, &window_h); | |
| 30 | |
| 31 SDL_SetRenderDrawBlendMode(blendMode); | |
|
2902
83c3a4b0e421
Fixed crash in testdraw2, added more points
Sam Lantinga <slouken@libsdl.org>
parents:
2901
diff
changeset
|
32 for (i = 0; i < num_objects * 4; ++i) { |
| 2901 | 33 /* Cycle the color and alpha, if desired */ |
| 34 if (cycle_color) { | |
| 35 current_color += cycle_direction; | |
| 36 if (current_color < 0) { | |
| 37 current_color = 0; | |
| 38 cycle_direction = -cycle_direction; | |
| 39 } | |
| 40 if (current_color > 255) { | |
| 41 current_color = 255; | |
| 42 cycle_direction = -cycle_direction; | |
| 43 } | |
| 44 } | |
| 45 if (cycle_alpha) { | |
| 46 current_alpha += cycle_direction; | |
| 47 if (current_alpha < 0) { | |
| 48 current_alpha = 0; | |
| 49 cycle_direction = -cycle_direction; | |
| 50 } | |
| 51 if (current_alpha > 255) { | |
| 52 current_alpha = 255; | |
| 53 cycle_direction = -cycle_direction; | |
| 54 } | |
| 55 } | |
| 56 SDL_SetRenderDrawColor(255, (Uint8) current_color, | |
| 57 (Uint8) current_color, (Uint8) current_alpha); | |
| 58 | |
| 59 x = rand() % window_w; | |
| 60 y = rand() % window_h; | |
| 61 SDL_RenderPoint(x, y); | |
| 62 } | |
| 63 SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE); | |
| 64 } | |
| 65 | |
| 66 void | |
| 67 DrawLines(SDL_WindowID window) | |
| 68 { | |
| 69 int i; | |
| 70 int x1, y1, x2, y2; | |
| 71 int window_w, window_h; | |
| 72 | |
| 73 /* Query the sizes */ | |
| 74 SDL_GetWindowSize(window, &window_w, &window_h); | |
| 75 | |
| 76 SDL_SetRenderDrawBlendMode(blendMode); | |
| 77 for (i = 0; i < num_objects; ++i) { | |
| 78 /* Cycle the color and alpha, if desired */ | |
| 79 if (cycle_color) { | |
| 80 current_color += cycle_direction; | |
| 81 if (current_color < 0) { | |
| 82 current_color = 0; | |
| 83 cycle_direction = -cycle_direction; | |
| 84 } | |
| 85 if (current_color > 255) { | |
| 86 current_color = 255; | |
| 87 cycle_direction = -cycle_direction; | |
| 88 } | |
| 89 } | |
| 90 if (cycle_alpha) { | |
| 91 current_alpha += cycle_direction; | |
| 92 if (current_alpha < 0) { | |
| 93 current_alpha = 0; | |
| 94 cycle_direction = -cycle_direction; | |
| 95 } | |
| 96 if (current_alpha > 255) { | |
| 97 current_alpha = 255; | |
| 98 cycle_direction = -cycle_direction; | |
| 99 } | |
| 100 } | |
| 101 SDL_SetRenderDrawColor(255, (Uint8) current_color, | |
| 102 (Uint8) current_color, (Uint8) current_alpha); | |
| 103 | |
| 104 if (i == 0) { | |
|
2902
83c3a4b0e421
Fixed crash in testdraw2, added more points
Sam Lantinga <slouken@libsdl.org>
parents:
2901
diff
changeset
|
105 SDL_RenderLine(0, 0, window_w - 1, window_h - 1); |
|
83c3a4b0e421
Fixed crash in testdraw2, added more points
Sam Lantinga <slouken@libsdl.org>
parents:
2901
diff
changeset
|
106 SDL_RenderLine(0, window_h - 1, window_w - 1, 0); |
|
83c3a4b0e421
Fixed crash in testdraw2, added more points
Sam Lantinga <slouken@libsdl.org>
parents:
2901
diff
changeset
|
107 SDL_RenderLine(0, window_h / 2, window_w - 1, window_h / 2); |
|
83c3a4b0e421
Fixed crash in testdraw2, added more points
Sam Lantinga <slouken@libsdl.org>
parents:
2901
diff
changeset
|
108 SDL_RenderLine(window_w / 2, 0, window_w / 2, window_h - 1); |
| 2901 | 109 } else { |
| 110 x1 = rand() % window_w; | |
| 111 x2 = rand() % window_w; | |
| 112 y1 = rand() % window_h; | |
| 113 y2 = rand() % window_h; | |
| 114 SDL_RenderLine(x1, y1, x2, y2); | |
| 115 } | |
| 116 } | |
| 117 SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE); | |
| 118 } | |
| 119 | |
| 120 void | |
| 121 DrawRects(SDL_WindowID window) | |
| 122 { | |
| 123 int i; | |
| 124 SDL_Rect rect; | |
| 125 int window_w, window_h; | |
| 126 | |
| 127 /* Query the sizes */ | |
| 128 SDL_GetWindowSize(window, &window_w, &window_h); | |
| 129 | |
| 130 SDL_SetRenderDrawBlendMode(blendMode); | |
|
2902
83c3a4b0e421
Fixed crash in testdraw2, added more points
Sam Lantinga <slouken@libsdl.org>
parents:
2901
diff
changeset
|
131 for (i = 0; i < num_objects / 4; ++i) { |
| 2901 | 132 /* Cycle the color and alpha, if desired */ |
| 133 if (cycle_color) { | |
| 134 current_color += cycle_direction; | |
| 135 if (current_color < 0) { | |
| 136 current_color = 0; | |
| 137 cycle_direction = -cycle_direction; | |
| 138 } | |
| 139 if (current_color > 255) { | |
| 140 current_color = 255; | |
| 141 cycle_direction = -cycle_direction; | |
| 142 } | |
| 143 } | |
| 144 if (cycle_alpha) { | |
| 145 current_alpha += cycle_direction; | |
| 146 if (current_alpha < 0) { | |
| 147 current_alpha = 0; | |
| 148 cycle_direction = -cycle_direction; | |
| 149 } | |
| 150 if (current_alpha > 255) { | |
| 151 current_alpha = 255; | |
| 152 cycle_direction = -cycle_direction; | |
| 153 } | |
| 154 } | |
| 155 SDL_SetRenderDrawColor(255, (Uint8) current_color, | |
| 156 (Uint8) current_color, (Uint8) current_alpha); | |
| 157 | |
| 158 rect.w = rand() % (window_h / 2); | |
| 159 rect.h = rand() % (window_h / 2); | |
| 160 rect.x = (rand() % window_w) - (rect.w / 2); | |
| 161 rect.y = (rand() % window_w) - (rect.h / 2); | |
| 162 SDL_RenderFill(&rect); | |
| 163 } | |
| 164 SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE); | |
| 165 } | |
| 166 | |
| 167 int | |
| 168 main(int argc, char *argv[]) | |
| 169 { | |
| 170 int i, done; | |
| 171 SDL_Event event; | |
| 172 Uint32 then, now, frames; | |
| 173 | |
| 174 /* Initialize parameters */ | |
| 175 num_objects = NUM_OBJECTS; | |
| 176 | |
| 177 /* Initialize test framework */ | |
| 178 state = CommonCreateState(argv, SDL_INIT_VIDEO); | |
| 179 if (!state) { | |
| 180 return 1; | |
| 181 } | |
| 182 for (i = 1; i < argc;) { | |
| 183 int consumed; | |
| 184 | |
| 185 consumed = CommonArg(state, i); | |
| 186 if (consumed == 0) { | |
| 187 consumed = -1; | |
| 188 if (SDL_strcasecmp(argv[i], "--blend") == 0) { | |
| 189 if (argv[i + 1]) { | |
| 190 if (SDL_strcasecmp(argv[i + 1], "none") == 0) { | |
| 191 blendMode = SDL_BLENDMODE_NONE; | |
| 192 consumed = 2; | |
| 193 } else if (SDL_strcasecmp(argv[i + 1], "mask") == 0) { | |
| 194 blendMode = SDL_BLENDMODE_MASK; | |
| 195 consumed = 2; | |
| 196 } else if (SDL_strcasecmp(argv[i + 1], "blend") == 0) { | |
| 197 blendMode = SDL_BLENDMODE_BLEND; | |
| 198 consumed = 2; | |
| 199 } else if (SDL_strcasecmp(argv[i + 1], "add") == 0) { | |
| 200 blendMode = SDL_BLENDMODE_ADD; | |
| 201 consumed = 2; | |
| 202 } else if (SDL_strcasecmp(argv[i + 1], "mod") == 0) { | |
| 203 blendMode = SDL_BLENDMODE_MOD; | |
| 204 consumed = 2; | |
| 205 } | |
| 206 } | |
| 207 } else if (SDL_strcasecmp(argv[i], "--cyclecolor") == 0) { | |
| 208 cycle_color = SDL_TRUE; | |
| 209 consumed = 1; | |
| 210 } else if (SDL_strcasecmp(argv[i], "--cyclealpha") == 0) { | |
| 211 cycle_alpha = SDL_TRUE; | |
| 212 consumed = 1; | |
| 213 } else if (SDL_isdigit(*argv[i])) { | |
| 214 num_objects = SDL_atoi(argv[i]); | |
| 215 consumed = 1; | |
| 216 } | |
| 217 } | |
| 218 if (consumed < 0) { | |
| 219 fprintf(stderr, | |
| 220 "Usage: %s %s [--blend none|mask|blend|add|mod] [--cyclecolor] [--cyclealpha]\n", | |
| 221 argv[0], CommonUsage(state)); | |
| 222 return 1; | |
| 223 } | |
| 224 i += consumed; | |
| 225 } | |
| 226 if (!CommonInit(state)) { | |
| 227 return 2; | |
| 228 } | |
| 229 | |
| 230 /* Create the windows and initialize the renderers */ | |
| 231 for (i = 0; i < state->num_windows; ++i) { | |
| 232 SDL_SelectRenderer(state->windows[i]); | |
| 233 SDL_SetRenderDrawColor(0xA0, 0xA0, 0xA0, 0xFF); | |
| 234 SDL_RenderFill(NULL); | |
| 235 } | |
| 236 | |
| 237 srand(time(NULL)); | |
| 238 | |
| 239 /* Main render loop */ | |
| 240 frames = 0; | |
| 241 then = SDL_GetTicks(); | |
| 242 done = 0; | |
| 243 while (!done) { | |
| 244 /* Check for events */ | |
| 245 ++frames; | |
| 246 while (SDL_PollEvent(&event)) { | |
| 247 CommonEvent(state, &event, &done); | |
| 248 switch (event.type) { | |
| 249 case SDL_WINDOWEVENT: | |
| 250 switch (event.window.event) { | |
| 251 case SDL_WINDOWEVENT_EXPOSED: | |
| 252 SDL_SelectRenderer(event.window.windowID); | |
| 253 SDL_SetRenderDrawColor(0xA0, 0xA0, 0xA0, 0xFF); | |
| 254 SDL_RenderFill(NULL); | |
| 255 break; | |
| 256 } | |
| 257 break; | |
| 258 default: | |
| 259 break; | |
| 260 } | |
| 261 } | |
| 262 for (i = 0; i < state->num_windows; ++i) { | |
| 263 SDL_SelectRenderer(state->windows[i]); | |
| 264 SDL_SetRenderDrawColor(0xA0, 0xA0, 0xA0, 0xFF); | |
| 265 SDL_RenderFill(NULL); | |
| 266 | |
| 267 DrawRects(state->windows[i]); | |
| 268 DrawLines(state->windows[i]); | |
| 269 DrawPoints(state->windows[i]); | |
| 270 | |
| 271 SDL_RenderPresent(); | |
| 272 } | |
| 273 } | |
| 274 | |
|
3371
438ba87e9578
Call CommonQuit() at exit has been added.
Mike Gorchak <lestat@i.com.ua>
parents:
2902
diff
changeset
|
275 CommonQuit(state); |
|
438ba87e9578
Call CommonQuit() at exit has been added.
Mike Gorchak <lestat@i.com.ua>
parents:
2902
diff
changeset
|
276 |
| 2901 | 277 /* Print out some timing information */ |
| 278 now = SDL_GetTicks(); | |
| 279 if (now > then) { | |
| 280 double fps = ((double) frames * 1000) / (now - then); | |
| 281 printf("%2.2f frames per second\n", fps); | |
| 282 } | |
| 283 return 0; | |
| 284 } | |
| 285 | |
| 286 /* vi: set ts=4 sw=4 expandtab: */ |