SDL 2.0
testdraw2.c
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1/*
2 Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
3
4 This software is provided 'as-is', without any express or implied
5 warranty. In no event will the authors be held liable for any damages
6 arising from the use of this software.
7
8 Permission is granted to anyone to use this software for any purpose,
9 including commercial applications, and to alter it and redistribute it
10 freely.
11*/
12
13/* Simple program: draw as many random objects on the screen as possible */
14
15#include <stdlib.h>
16#include <stdio.h>
17#include <time.h>
18
19#ifdef __EMSCRIPTEN__
20#include <emscripten/emscripten.h>
21#endif
22
23#include "SDL_test_common.h"
24
25#define NUM_OBJECTS 100
26
28static int num_objects;
31static int cycle_direction = 1;
32static int current_alpha = 255;
33static int current_color = 255;
35
36int done;
37
38void
40{
41 int i;
42 int x, y;
44
45 /* Query the sizes */
47
48 for (i = 0; i < num_objects * 4; ++i) {
49 /* Cycle the color and alpha, if desired */
50 if (cycle_color) {
52 if (current_color < 0) {
53 current_color = 0;
55 }
56 if (current_color > 255) {
57 current_color = 255;
59 }
60 }
61 if (cycle_alpha) {
63 if (current_alpha < 0) {
64 current_alpha = 0;
66 }
67 if (current_alpha > 255) {
68 current_alpha = 255;
70 }
71 }
74
75 x = rand() % viewport.w;
76 y = rand() % viewport.h;
78 }
79}
80
81void
83{
84 int i;
85 int x1, y1, x2, y2;
87
88 /* Query the sizes */
90
91 for (i = 0; i < num_objects; ++i) {
92 /* Cycle the color and alpha, if desired */
93 if (cycle_color) {
95 if (current_color < 0) {
96 current_color = 0;
98 }
99 if (current_color > 255) {
100 current_color = 255;
102 }
103 }
104 if (cycle_alpha) {
106 if (current_alpha < 0) {
107 current_alpha = 0;
109 }
110 if (current_alpha > 255) {
111 current_alpha = 255;
113 }
114 }
117
118 if (i == 0) {
123 } else {
124 x1 = (rand() % (viewport.w*2)) - viewport.w;
125 x2 = (rand() % (viewport.w*2)) - viewport.w;
126 y1 = (rand() % (viewport.h*2)) - viewport.h;
127 y2 = (rand() % (viewport.h*2)) - viewport.h;
129 }
130 }
131}
132
133void
135{
136 int i;
139
140 /* Query the sizes */
142
143 for (i = 0; i < num_objects / 4; ++i) {
144 /* Cycle the color and alpha, if desired */
145 if (cycle_color) {
147 if (current_color < 0) {
148 current_color = 0;
150 }
151 if (current_color > 255) {
152 current_color = 255;
154 }
155 }
156 if (cycle_alpha) {
158 if (current_alpha < 0) {
159 current_alpha = 0;
161 }
162 if (current_alpha > 255) {
163 current_alpha = 255;
165 }
166 }
169
170 rect.w = rand() % (viewport.h / 2);
171 rect.h = rand() % (viewport.h / 2);
172 rect.x = (rand() % (viewport.w*2) - viewport.w) - (rect.w / 2);
173 rect.y = (rand() % (viewport.h*2) - viewport.h) - (rect.h / 2);
175 }
176}
177
178void
180{
181 int i;
183
184 /* Check for events */
185 while (SDL_PollEvent(&event)) {
187 }
188 for (i = 0; i < state->num_windows; ++i) {
190 if (state->windows[i] == NULL)
191 continue;
192 SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
194
198
200 }
201#ifdef __EMSCRIPTEN__
202 if (done) {
203 emscripten_cancel_main_loop();
204 }
205#endif
206}
207
208int
209main(int argc, char *argv[])
210{
211 int i;
212 Uint32 then, now, frames;
213
214 /* Enable standard application logging */
216
217 /* Initialize parameters */
219
220 /* Initialize test framework */
222 if (!state) {
223 return 1;
224 }
225 for (i = 1; i < argc;) {
226 int consumed;
227
228 consumed = SDLTest_CommonArg(state, i);
229 if (consumed == 0) {
230 consumed = -1;
231 if (SDL_strcasecmp(argv[i], "--blend") == 0) {
232 if (argv[i + 1]) {
233 if (SDL_strcasecmp(argv[i + 1], "none") == 0) {
235 consumed = 2;
236 } else if (SDL_strcasecmp(argv[i + 1], "blend") == 0) {
238 consumed = 2;
239 } else if (SDL_strcasecmp(argv[i + 1], "add") == 0) {
241 consumed = 2;
242 } else if (SDL_strcasecmp(argv[i + 1], "mod") == 0) {
244 consumed = 2;
245 }
246 }
247 } else if (SDL_strcasecmp(argv[i], "--cyclecolor") == 0) {
249 consumed = 1;
250 } else if (SDL_strcasecmp(argv[i], "--cyclealpha") == 0) {
252 consumed = 1;
253 } else if (SDL_isdigit(*argv[i])) {
254 num_objects = SDL_atoi(argv[i]);
255 consumed = 1;
256 }
257 }
258 if (consumed < 0) {
259 static const char *options[] = { "[--blend none|blend|add|mod]", "[--cyclecolor]", "[--cyclealpha]", NULL };
260 SDLTest_CommonLogUsage(state, argv[0], options);
261 return 1;
262 }
263 i += consumed;
264 }
266 return 2;
267 }
268
269 /* Create the windows and initialize the renderers */
270 for (i = 0; i < state->num_windows; ++i) {
273 SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
275 }
276
277 srand((unsigned int)time(NULL));
278
279 /* Main render loop */
280 frames = 0;
281 then = SDL_GetTicks();
282 done = 0;
283
284#ifdef __EMSCRIPTEN__
285 emscripten_set_main_loop(loop, 0, 1);
286#else
287 while (!done) {
288 ++frames;
289 loop();
290 }
291#endif
292
293
295
296 /* Print out some timing information */
297 now = SDL_GetTicks();
298 if (now > then) {
299 double fps = ((double) frames * 1000) / (now - then);
300 SDL_Log("%2.2f frames per second\n", fps);
301 }
302 return 0;
303}
304
305/* vi: set ts=4 sw=4 expandtab: */
#define SDL_INIT_VIDEO
Definition: SDL.h:79
SDL_BlendMode
The blend mode used in SDL_RenderCopy() and drawing operations.
Definition: SDL_blendmode.h:41
@ SDL_BLENDMODE_NONE
Definition: SDL_blendmode.h:42
@ SDL_BLENDMODE_ADD
Definition: SDL_blendmode.h:47
@ SDL_BLENDMODE_BLEND
Definition: SDL_blendmode.h:44
@ SDL_BLENDMODE_MOD
Definition: SDL_blendmode.h:50
#define SDL_RenderPresent
#define SDL_RenderGetViewport
#define SDL_PollEvent
#define SDL_RenderFillRect
#define SDL_SetRenderDrawColor
#define SDL_RenderDrawLine
#define SDL_isdigit
#define SDL_SetRenderDrawBlendMode
#define SDL_strcasecmp
#define SDL_RenderDrawPoint
#define SDL_LogSetPriority
#define SDL_RenderClear
#define SDL_atoi
#define SDL_Log
@ SDL_LOG_PRIORITY_INFO
Definition: SDL_log.h:106
@ SDL_LOG_CATEGORY_APPLICATION
Definition: SDL_log.h:66
GLint GLint GLint GLint GLint GLint y
Definition: SDL_opengl.h:1574
GLint GLint GLint GLint GLint x
Definition: SDL_opengl.h:1574
struct _cl_event * event
GLfixed GLfixed GLfixed y2
GLfixed y1
GLuint GLfloat GLfloat GLfloat x1
GLfixed GLfixed x2
SDL_bool
Definition: SDL_stdinc.h:162
@ SDL_TRUE
Definition: SDL_stdinc.h:164
uint32_t Uint32
Definition: SDL_stdinc.h:203
uint8_t Uint8
Definition: SDL_stdinc.h:179
void SDLTest_CommonQuit(SDLTest_CommonState *state)
Close test window.
SDLTest_CommonState * SDLTest_CommonCreateState(char **argv, Uint32 flags)
Parse command line parameters and create common state.
void SDLTest_CommonEvent(SDLTest_CommonState *state, SDL_Event *event, int *done)
Common event handler for test windows.
int SDLTest_CommonArg(SDLTest_CommonState *state, int index)
Process one common argument.
SDL_bool SDLTest_CommonInit(SDLTest_CommonState *state)
Open test window.
void SDLTest_CommonLogUsage(SDLTest_CommonState *state, const char *argv0, const char **options)
Logs command line usage info.
Uint32 SDL_GetTicks(void)
Get the number of milliseconds since the SDL library initialization.
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
Definition: SDL_x11sym.h:50
#define NULL
Definition: begin_code.h:167
EGLSurface EGLnsecsANDROID time
Definition: eglext.h:518
A rectangle, with the origin at the upper left (integer).
Definition: SDL_rect.h:78
int h
Definition: SDL_rect.h:80
int w
Definition: SDL_rect.h:80
int y
Definition: SDL_rect.h:79
int x
Definition: SDL_rect.h:79
SDL_Window ** windows
SDL_Renderer ** renderers
static SDL_Renderer * renderer
int main(int argc, char *argv[])
Definition: testdraw2.c:209
static int current_color
Definition: testdraw2.c:33
static int current_alpha
Definition: testdraw2.c:32
static int cycle_direction
Definition: testdraw2.c:31
void DrawRects(SDL_Renderer *renderer)
Definition: testdraw2.c:134
#define NUM_OBJECTS
Definition: testdraw2.c:25
static SDL_BlendMode blendMode
Definition: testdraw2.c:34
int done
Definition: testdraw2.c:36
static SDL_bool cycle_alpha
Definition: testdraw2.c:30
static SDL_bool cycle_color
Definition: testdraw2.c:29
static int num_objects
Definition: testdraw2.c:28
void DrawLines(SDL_Renderer *renderer)
Definition: testdraw2.c:82
static SDLTest_CommonState * state
Definition: testdraw2.c:27
void DrawPoints(SDL_Renderer *renderer)
Definition: testdraw2.c:39
void loop()
Definition: testdraw2.c:179
SDL_Rect rect
Definition: testrelative.c:27
static Uint32 frames
Definition: testsprite2.c:40
SDL_Rect viewport
Definition: testviewport.c:28
General event structure.
Definition: SDL_events.h:558