Mercurial > sdl-ios-xcode
annotate test/testdraw2.c @ 5167:97423d858a1a
Added an intro to the features and goals of the 2D rendering API.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Thu, 03 Feb 2011 10:03:55 -0800 |
| parents | ad50b3db78bd |
| children | d976b67150c5 |
| 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 | |
|
5150
ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
Sam Lantinga <slouken@libsdl.org>
parents:
5143
diff
changeset
|
22 DrawPoints(SDL_Window * window, SDL_Renderer * renderer) |
| 2901 | 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 | |
|
2902
83c3a4b0e421
Fixed crash in testdraw2, added more points
Sam Lantinga <slouken@libsdl.org>
parents:
2901
diff
changeset
|
31 for (i = 0; i < num_objects * 4; ++i) { |
| 2901 | 32 /* Cycle the color and alpha, if desired */ |
| 33 if (cycle_color) { | |
| 34 current_color += cycle_direction; | |
| 35 if (current_color < 0) { | |
| 36 current_color = 0; | |
| 37 cycle_direction = -cycle_direction; | |
| 38 } | |
| 39 if (current_color > 255) { | |
| 40 current_color = 255; | |
| 41 cycle_direction = -cycle_direction; | |
| 42 } | |
| 43 } | |
| 44 if (cycle_alpha) { | |
| 45 current_alpha += cycle_direction; | |
| 46 if (current_alpha < 0) { | |
| 47 current_alpha = 0; | |
| 48 cycle_direction = -cycle_direction; | |
| 49 } | |
| 50 if (current_alpha > 255) { | |
| 51 current_alpha = 255; | |
| 52 cycle_direction = -cycle_direction; | |
| 53 } | |
| 54 } | |
|
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ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
Sam Lantinga <slouken@libsdl.org>
parents:
5143
diff
changeset
|
55 SDL_SetRenderDrawColor(renderer, 255, (Uint8) current_color, |
| 2901 | 56 (Uint8) current_color, (Uint8) current_alpha); |
| 57 | |
| 58 x = rand() % window_w; | |
| 59 y = rand() % window_h; | |
|
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ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
Sam Lantinga <slouken@libsdl.org>
parents:
5143
diff
changeset
|
60 SDL_RenderDrawPoint(renderer, x, y); |
| 2901 | 61 } |
| 62 } | |
| 63 | |
| 64 void | |
|
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ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
Sam Lantinga <slouken@libsdl.org>
parents:
5143
diff
changeset
|
65 DrawLines(SDL_Window * window, SDL_Renderer * renderer) |
| 2901 | 66 { |
| 67 int i; | |
| 68 int x1, y1, x2, y2; | |
| 69 int window_w, window_h; | |
| 70 | |
| 71 /* Query the sizes */ | |
| 72 SDL_GetWindowSize(window, &window_w, &window_h); | |
| 73 | |
| 74 for (i = 0; i < num_objects; ++i) { | |
| 75 /* Cycle the color and alpha, if desired */ | |
| 76 if (cycle_color) { | |
| 77 current_color += cycle_direction; | |
| 78 if (current_color < 0) { | |
| 79 current_color = 0; | |
| 80 cycle_direction = -cycle_direction; | |
| 81 } | |
| 82 if (current_color > 255) { | |
| 83 current_color = 255; | |
| 84 cycle_direction = -cycle_direction; | |
| 85 } | |
| 86 } | |
| 87 if (cycle_alpha) { | |
| 88 current_alpha += cycle_direction; | |
| 89 if (current_alpha < 0) { | |
| 90 current_alpha = 0; | |
| 91 cycle_direction = -cycle_direction; | |
| 92 } | |
| 93 if (current_alpha > 255) { | |
| 94 current_alpha = 255; | |
| 95 cycle_direction = -cycle_direction; | |
| 96 } | |
| 97 } | |
|
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ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
Sam Lantinga <slouken@libsdl.org>
parents:
5143
diff
changeset
|
98 SDL_SetRenderDrawColor(renderer, 255, (Uint8) current_color, |
| 2901 | 99 (Uint8) current_color, (Uint8) current_alpha); |
| 100 | |
| 101 if (i == 0) { | |
|
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ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
Sam Lantinga <slouken@libsdl.org>
parents:
5143
diff
changeset
|
102 SDL_RenderDrawLine(renderer, 0, 0, window_w - 1, window_h - 1); |
|
ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
Sam Lantinga <slouken@libsdl.org>
parents:
5143
diff
changeset
|
103 SDL_RenderDrawLine(renderer, 0, window_h - 1, window_w - 1, 0); |
|
ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
Sam Lantinga <slouken@libsdl.org>
parents:
5143
diff
changeset
|
104 SDL_RenderDrawLine(renderer, 0, window_h / 2, window_w - 1, window_h / 2); |
|
ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
Sam Lantinga <slouken@libsdl.org>
parents:
5143
diff
changeset
|
105 SDL_RenderDrawLine(renderer, window_w / 2, 0, window_w / 2, window_h - 1); |
| 2901 | 106 } else { |
|
3546
65848493e08e
Allow points to be outside the window bounds, stress testing the clipping code.
Sam Lantinga <slouken@libsdl.org>
parents:
3536
diff
changeset
|
107 x1 = (rand() % (window_w*2)) - window_w; |
|
65848493e08e
Allow points to be outside the window bounds, stress testing the clipping code.
Sam Lantinga <slouken@libsdl.org>
parents:
3536
diff
changeset
|
108 x2 = (rand() % (window_w*2)) - window_w; |
|
65848493e08e
Allow points to be outside the window bounds, stress testing the clipping code.
Sam Lantinga <slouken@libsdl.org>
parents:
3536
diff
changeset
|
109 y1 = (rand() % (window_h*2)) - window_h; |
|
65848493e08e
Allow points to be outside the window bounds, stress testing the clipping code.
Sam Lantinga <slouken@libsdl.org>
parents:
3536
diff
changeset
|
110 y2 = (rand() % (window_h*2)) - window_h; |
|
5150
ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
Sam Lantinga <slouken@libsdl.org>
parents:
5143
diff
changeset
|
111 SDL_RenderDrawLine(renderer, x1, y1, x2, y2); |
| 2901 | 112 } |
| 113 } | |
| 114 } | |
| 115 | |
| 116 void | |
|
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ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
Sam Lantinga <slouken@libsdl.org>
parents:
5143
diff
changeset
|
117 DrawRects(SDL_Window * window, SDL_Renderer * renderer) |
| 2901 | 118 { |
| 119 int i; | |
| 120 SDL_Rect rect; | |
| 121 int window_w, window_h; | |
| 122 | |
| 123 /* Query the sizes */ | |
| 124 SDL_GetWindowSize(window, &window_w, &window_h); | |
| 125 | |
|
2902
83c3a4b0e421
Fixed crash in testdraw2, added more points
Sam Lantinga <slouken@libsdl.org>
parents:
2901
diff
changeset
|
126 for (i = 0; i < num_objects / 4; ++i) { |
| 2901 | 127 /* Cycle the color and alpha, if desired */ |
| 128 if (cycle_color) { | |
| 129 current_color += cycle_direction; | |
| 130 if (current_color < 0) { | |
| 131 current_color = 0; | |
| 132 cycle_direction = -cycle_direction; | |
| 133 } | |
| 134 if (current_color > 255) { | |
| 135 current_color = 255; | |
| 136 cycle_direction = -cycle_direction; | |
| 137 } | |
| 138 } | |
| 139 if (cycle_alpha) { | |
| 140 current_alpha += cycle_direction; | |
| 141 if (current_alpha < 0) { | |
| 142 current_alpha = 0; | |
| 143 cycle_direction = -cycle_direction; | |
| 144 } | |
| 145 if (current_alpha > 255) { | |
| 146 current_alpha = 255; | |
| 147 cycle_direction = -cycle_direction; | |
| 148 } | |
| 149 } | |
|
5150
ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
Sam Lantinga <slouken@libsdl.org>
parents:
5143
diff
changeset
|
150 SDL_SetRenderDrawColor(renderer, 255, (Uint8) current_color, |
| 2901 | 151 (Uint8) current_color, (Uint8) current_alpha); |
| 152 | |
| 153 rect.w = rand() % (window_h / 2); | |
| 154 rect.h = rand() % (window_h / 2); | |
|
3546
65848493e08e
Allow points to be outside the window bounds, stress testing the clipping code.
Sam Lantinga <slouken@libsdl.org>
parents:
3536
diff
changeset
|
155 rect.x = (rand() % (window_w*2) - window_w) - (rect.w / 2); |
|
65848493e08e
Allow points to be outside the window bounds, stress testing the clipping code.
Sam Lantinga <slouken@libsdl.org>
parents:
3536
diff
changeset
|
156 rect.y = (rand() % (window_h*2) - window_h) - (rect.h / 2); |
|
5150
ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
Sam Lantinga <slouken@libsdl.org>
parents:
5143
diff
changeset
|
157 SDL_RenderFillRect(renderer, &rect); |
| 2901 | 158 } |
| 159 } | |
| 160 | |
| 161 int | |
| 162 main(int argc, char *argv[]) | |
| 163 { | |
| 164 int i, done; | |
| 165 SDL_Event event; | |
| 166 Uint32 then, now, frames; | |
| 167 | |
| 168 /* Initialize parameters */ | |
| 169 num_objects = NUM_OBJECTS; | |
| 170 | |
| 171 /* Initialize test framework */ | |
| 172 state = CommonCreateState(argv, SDL_INIT_VIDEO); | |
| 173 if (!state) { | |
| 174 return 1; | |
| 175 } | |
| 176 for (i = 1; i < argc;) { | |
| 177 int consumed; | |
| 178 | |
| 179 consumed = CommonArg(state, i); | |
| 180 if (consumed == 0) { | |
| 181 consumed = -1; | |
| 182 if (SDL_strcasecmp(argv[i], "--blend") == 0) { | |
| 183 if (argv[i + 1]) { | |
| 184 if (SDL_strcasecmp(argv[i + 1], "none") == 0) { | |
| 185 blendMode = SDL_BLENDMODE_NONE; | |
| 186 consumed = 2; | |
| 187 } else if (SDL_strcasecmp(argv[i + 1], "blend") == 0) { | |
| 188 blendMode = SDL_BLENDMODE_BLEND; | |
| 189 consumed = 2; | |
| 190 } else if (SDL_strcasecmp(argv[i + 1], "add") == 0) { | |
| 191 blendMode = SDL_BLENDMODE_ADD; | |
| 192 consumed = 2; | |
| 193 } | |
| 194 } | |
| 195 } else if (SDL_strcasecmp(argv[i], "--cyclecolor") == 0) { | |
| 196 cycle_color = SDL_TRUE; | |
| 197 consumed = 1; | |
| 198 } else if (SDL_strcasecmp(argv[i], "--cyclealpha") == 0) { | |
| 199 cycle_alpha = SDL_TRUE; | |
| 200 consumed = 1; | |
| 201 } else if (SDL_isdigit(*argv[i])) { | |
| 202 num_objects = SDL_atoi(argv[i]); | |
| 203 consumed = 1; | |
| 204 } | |
| 205 } | |
| 206 if (consumed < 0) { | |
| 207 fprintf(stderr, | |
|
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e743b9c3f6d6
Making the API simpler, the blend modes are "none, blend, add" and are supported by all renderers.
Sam Lantinga <slouken@libsdl.org>
parents:
4884
diff
changeset
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208 "Usage: %s %s [--blend none|blend|add] [--cyclecolor] [--cyclealpha]\n", |
| 2901 | 209 argv[0], CommonUsage(state)); |
| 210 return 1; | |
| 211 } | |
| 212 i += consumed; | |
| 213 } | |
| 214 if (!CommonInit(state)) { | |
| 215 return 2; | |
| 216 } | |
| 217 | |
| 218 /* Create the windows and initialize the renderers */ | |
| 219 for (i = 0; i < state->num_windows; ++i) { | |
|
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ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
Sam Lantinga <slouken@libsdl.org>
parents:
5143
diff
changeset
|
220 SDL_Renderer *renderer = state->renderers[i]; |
|
ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
Sam Lantinga <slouken@libsdl.org>
parents:
5143
diff
changeset
|
221 SDL_SetRenderDrawBlendMode(renderer, blendMode); |
|
ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
Sam Lantinga <slouken@libsdl.org>
parents:
5143
diff
changeset
|
222 SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF); |
|
ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
Sam Lantinga <slouken@libsdl.org>
parents:
5143
diff
changeset
|
223 SDL_RenderClear(renderer); |
| 2901 | 224 } |
| 225 | |
|
4884
27ab20a36eba
- added directx include path to VS2008 solution
Andreas Schiffler <aschiffler@ferzkopp.net>
parents:
3685
diff
changeset
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226 srand((unsigned int)time(NULL)); |
| 2901 | 227 |
| 228 /* Main render loop */ | |
| 229 frames = 0; | |
| 230 then = SDL_GetTicks(); | |
| 231 done = 0; | |
| 232 while (!done) { | |
| 233 /* Check for events */ | |
| 234 ++frames; | |
| 235 while (SDL_PollEvent(&event)) { | |
| 236 CommonEvent(state, &event, &done); | |
| 237 } | |
| 238 for (i = 0; i < state->num_windows; ++i) { | |
|
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ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
Sam Lantinga <slouken@libsdl.org>
parents:
5143
diff
changeset
|
239 SDL_Renderer *renderer = state->renderers[i]; |
|
ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
Sam Lantinga <slouken@libsdl.org>
parents:
5143
diff
changeset
|
240 SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF); |
|
ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
Sam Lantinga <slouken@libsdl.org>
parents:
5143
diff
changeset
|
241 SDL_RenderClear(renderer); |
| 2901 | 242 |
|
5150
ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
Sam Lantinga <slouken@libsdl.org>
parents:
5143
diff
changeset
|
243 DrawRects(state->windows[i], renderer); |
|
ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
Sam Lantinga <slouken@libsdl.org>
parents:
5143
diff
changeset
|
244 DrawLines(state->windows[i], renderer); |
|
ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
Sam Lantinga <slouken@libsdl.org>
parents:
5143
diff
changeset
|
245 DrawPoints(state->windows[i], renderer); |
| 2901 | 246 |
|
5150
ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
Sam Lantinga <slouken@libsdl.org>
parents:
5143
diff
changeset
|
247 SDL_RenderPresent(renderer); |
| 2901 | 248 } |
| 249 } | |
| 250 | |
|
3371
438ba87e9578
Call CommonQuit() at exit has been added.
Mike Gorchak <lestat@i.com.ua>
parents:
2902
diff
changeset
|
251 CommonQuit(state); |
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438ba87e9578
Call CommonQuit() at exit has been added.
Mike Gorchak <lestat@i.com.ua>
parents:
2902
diff
changeset
|
252 |
| 2901 | 253 /* Print out some timing information */ |
| 254 now = SDL_GetTicks(); | |
| 255 if (now > then) { | |
| 256 double fps = ((double) frames * 1000) / (now - then); | |
| 257 printf("%2.2f frames per second\n", fps); | |
| 258 } | |
| 259 return 0; | |
| 260 } | |
| 261 | |
| 262 /* vi: set ts=4 sw=4 expandtab: */ |