This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
/
testgles.c
299 lines (266 loc) · 7.86 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include "common.h"
#ifdef __IPHONEOS__
#define HAVE_OPENGLES
#endif
#ifdef HAVE_OPENGLES
#include "SDL_opengles.h"
static CommonState *state;
17
static SDL_GLContext *context=NULL;
18
19
20
21
22
/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
static void
quit(int rc)
{
23
24
25
26
27
28
29
30
31
32
33
34
int i;
if (context!=NULL)
{
for (i=0; i<state->num_windows; i++)
{
if (context[i]) {
SDL_GL_DeleteContext(context[i]);
}
}
SDL_free(context);
35
}
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
CommonQuit(state);
exit(rc);
}
static void
Render()
{
static GLubyte color[8][4] = { {255, 0, 0, 0},
{255, 0, 0, 255},
{0, 255, 0, 255},
{0, 255, 0, 255},
{0, 255, 0, 255},
{255, 255, 255, 255},
{255, 0, 255, 255},
{0, 0, 255, 255}
};
static GLfloat cube[8][3] = { {0.5, 0.5, -0.5},
{0.5f, -0.5f, -0.5f},
{-0.5f, -0.5f, -0.5f},
{-0.5f, 0.5f, -0.5f},
{-0.5f, 0.5f, 0.5f},
{0.5f, 0.5f, 0.5f},
{0.5f, -0.5f, 0.5f},
{-0.5f, -0.5f, 0.5f}
};
static GLubyte indices[36] = { 0, 3, 4,
4, 5, 0,
0, 5, 6,
6, 1, 0,
6, 7, 2,
2, 1, 6,
7, 4, 3,
3, 2, 7,
5, 4, 7,
7, 6, 5,
2, 3, 1,
3, 0, 1
};
/* Do our drawing, too. */
glClearColor(0.0, 0.0, 0.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
/* Draw the cube */
glColorPointer(4, GL_UNSIGNED_BYTE, 0, color);
glEnableClientState(GL_COLOR_ARRAY);
glVertexPointer(3, GL_FLOAT, 0, cube);
glEnableClientState(GL_VERTEX_ARRAY);
glDrawElements(GL_TRIANGLES, 36, GL_UNSIGNED_BYTE, indices);
glMatrixMode(GL_MODELVIEW);
glRotatef(5.0, 1.0, 1.0, 1.0);
}
int
main(int argc, char *argv[])
{
int fsaa, accel;
int value;
int i, done;
SDL_DisplayMode mode;
SDL_Event event;
Uint32 then, now, frames;
101
int status;
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
/* Initialize parameters */
fsaa = 0;
accel = 0;
/* Initialize test framework */
state = CommonCreateState(argv, SDL_INIT_VIDEO);
if (!state) {
return 1;
}
for (i = 1; i < argc;) {
int consumed;
consumed = CommonArg(state, i);
if (consumed == 0) {
if (SDL_strcasecmp(argv[i], "--fsaa") == 0) {
++fsaa;
consumed = 1;
} else if (SDL_strcasecmp(argv[i], "--accel") == 0) {
++accel;
consumed = 1;
} else {
consumed = -1;
}
}
if (consumed < 0) {
fprintf(stderr, "Usage: %s %s [--fsaa] [--accel]\n", argv[0],
CommonUsage(state));
quit(1);
}
i += consumed;
}
/* Set OpenGL parameters */
state->window_flags |= SDL_WINDOW_OPENGL;
SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 5);
SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
if (fsaa) {
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS, 1);
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES, fsaa);
}
if (accel) {
SDL_GL_SetAttribute(SDL_GL_ACCELERATED_VISUAL, 1);
}
if (!CommonInit(state)) {
quit(2);
}
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
context=SDL_calloc(state->num_windows, sizeof(SDL_GLContext));
if (context==NULL)
{
fprintf(stderr, "Out of memory!\n");
quit(2);
}
/* Create OpenGL ES contexts */
for (i=0; i<state->num_windows; i++)
{
context[i] = SDL_GL_CreateContext(state->windows[i]);
if (!context[i]) {
fprintf(stderr, "SDL_GL_CreateContext(): %s\n", SDL_GetError());
quit(2);
}
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
}
if (state->render_flags & SDL_RENDERER_PRESENTVSYNC) {
SDL_GL_SetSwapInterval(1);
} else {
SDL_GL_SetSwapInterval(0);
}
SDL_GetCurrentDisplayMode(&mode);
printf("Screen BPP: %d\n", SDL_BITSPERPIXEL(mode.format));
printf("\n");
printf("Vendor : %s\n", glGetString(GL_VENDOR));
printf("Renderer : %s\n", glGetString(GL_RENDERER));
printf("Version : %s\n", glGetString(GL_VERSION));
printf("Extensions : %s\n", glGetString(GL_EXTENSIONS));
printf("\n");
184
185
186
187
status=SDL_GL_GetAttribute(SDL_GL_RED_SIZE, &value);
if (!status) {
printf("SDL_GL_RED_SIZE: requested %d, got %d\n", 5, value);
} else {
188
fprintf(stderr, "Failed to get SDL_GL_RED_SIZE: %s\n", SDL_GetError());
189
190
191
192
193
}
status=SDL_GL_GetAttribute(SDL_GL_GREEN_SIZE, &value);
if (!status) {
printf("SDL_GL_GREEN_SIZE: requested %d, got %d\n", 5, value);
} else {
194
fprintf(stderr, "Failed to get SDL_GL_GREEN_SIZE: %s\n", SDL_GetError());
195
196
197
198
199
}
status=SDL_GL_GetAttribute(SDL_GL_BLUE_SIZE, &value);
if (!status) {
printf("SDL_GL_BLUE_SIZE: requested %d, got %d\n", 5, value);
} else {
200
fprintf(stderr, "Failed to get SDL_GL_BLUE_SIZE: %s\n", SDL_GetError());
201
202
203
204
205
}
status=SDL_GL_GetAttribute(SDL_GL_DEPTH_SIZE, &value);
if (!status) {
printf("SDL_GL_DEPTH_SIZE: requested %d, got %d\n", 16, value);
} else {
206
fprintf(stderr, "Failed to get SDL_GL_DEPTH_SIZE: %s\n", SDL_GetError());
207
}
208
if (fsaa) {
209
210
211
212
status=SDL_GL_GetAttribute(SDL_GL_MULTISAMPLEBUFFERS, &value);
if (!status) {
printf("SDL_GL_MULTISAMPLEBUFFERS: requested 1, got %d\n", value);
} else {
213
fprintf(stderr, "Failed to get SDL_GL_MULTISAMPLEBUFFERS: %s\n", SDL_GetError());
214
215
216
217
218
}
status=SDL_GL_GetAttribute(SDL_GL_MULTISAMPLESAMPLES, &value);
if (!status) {
printf("SDL_GL_MULTISAMPLESAMPLES: requested %d, got %d\n", fsaa, value);
} else {
219
fprintf(stderr, "Failed to get SDL_GL_MULTISAMPLESAMPLES: %s\n", SDL_GetError());
220
}
221
222
}
if (accel) {
223
224
225
226
227
status=SDL_GL_GetAttribute(SDL_GL_ACCELERATED_VISUAL, &value);
if (!status)
{
printf("SDL_GL_ACCELERATED_VISUAL: requested 1, got %d\n", value);
} else {
228
fprintf(stderr, "Failed to get SDL_GL_ACCELERATED_VISUAL: %s\n", SDL_GetError());
229
}
230
231
}
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
/* Set rendering settings for each context */
for (i = 0; i < state->num_windows; ++i) {
status=SDL_GL_MakeCurrent(state->windows[i], context[i]);
if (status)
{
printf("SDL_GL_MakeCurrent(): %s\n", SDL_GetError());
/* Continue for next window */
continue;
}
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrthof(-2.0, 2.0, -2.0, 2.0, -20.0, 20.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LESS);
glShadeModel(GL_SMOOTH);
}
252
253
254
255
256
257
258
259
260
261
262
263
264
/* Main render loop */
frames = 0;
then = SDL_GetTicks();
done = 0;
while (!done) {
/* Check for events */
++frames;
while (SDL_PollEvent(&event)) {
CommonEvent(state, &event, &done);
}
for (i = 0; i < state->num_windows; ++i) {
int w, h;
265
266
267
268
269
270
271
272
status=SDL_GL_MakeCurrent(state->windows[i], context[i]);
if (status)
{
printf("SDL_GL_MakeCurrent(): %s\n", SDL_GetError());
/* Continue for next window */
continue;
}
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
SDL_GetWindowSize(state->windows[i], &w, &h);
glViewport(0, 0, w, h);
Render();
SDL_GL_SwapWindow(state->windows[i]);
}
}
/* Print out some timing information */
now = SDL_GetTicks();
if (now > then) {
printf("%2.2f frames per second\n",
((double) frames * 1000) / (now - then));
}
quit(0);
return 0;
}
#else /* HAVE_OPENGLES */
int
main(int argc, char *argv[])
{
printf("No OpenGL ES support on this system\n");
return 1;
}
#endif /* HAVE_OPENGLES */