1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
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
101
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
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
/*
* Exercise EGL API functions
*/
#define EGL_EGLEXT_PROTOTYPES
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <GLES/gl.h>
/*#define FRONTBUFFER*/
static void _subset_Rectf(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2,
GLfloat r, GLfloat g, GLfloat b)
{
GLfloat v[4][2], c[4][4];
int i;
v[0][0] = x1; v[0][1] = y1;
v[1][0] = x2; v[1][1] = y1;
v[2][0] = x2; v[2][1] = y2;
v[3][0] = x1; v[3][1] = y2;
for (i = 0; i < 4; i++) {
c[i][0] = r;
c[i][1] = g;
c[i][2] = b;
c[i][3] = 1.0;
}
glVertexPointer(2, GL_FLOAT, 0, v);
glColorPointer(4, GL_FLOAT, 0, v);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_COLOR_ARRAY);
}
static void redraw(EGLDisplay dpy, EGLSurface surf, int rot)
{
GLfloat r, g, b;
printf("Redraw event\n");
glClearColor( rand()/(float)RAND_MAX,
rand()/(float)RAND_MAX,
rand()/(float)RAND_MAX,
1);
glClear( GL_COLOR_BUFFER_BIT );
r = rand()/(float)RAND_MAX;
g = rand()/(float)RAND_MAX;
b = rand()/(float)RAND_MAX;
glPushMatrix();
glRotatef(rot, 0, 0, 1);
glScalef(.5, .5, .5);
_subset_Rectf( -1, -1, 1, 1, r, g, b );
glPopMatrix();
#ifdef FRONTBUFFER
glFlush();
#else
eglSwapBuffers( dpy, surf );
#endif
glFinish();
}
/**
* Test EGL_MESA_screen_surface functions
*/
static void
TestScreens(EGLDisplay dpy)
{
#define MAX 8
EGLScreenMESA screens[MAX];
EGLint numScreens;
EGLint i;
eglGetScreensMESA(dpy, screens, MAX, &numScreens);
printf("Found %d screens\n", numScreens);
for (i = 0; i < numScreens; i++) {
printf(" Screen %d handle: %d\n", i, (int) screens[i]);
}
}
int
main(int argc, char *argv[])
{
int maj, min;
EGLContext ctx;
EGLSurface pbuffer, screen_surf;
EGLConfig configs[10];
EGLint numConfigs, i;
EGLBoolean b;
const EGLint pbufAttribs[] = {
EGL_WIDTH, 500,
EGL_HEIGHT, 500,
EGL_NONE
};
EGLint screenAttribs[32];
EGLModeMESA mode;
EGLScreenMESA screen;
EGLint count;
EGLDisplay d = eglGetDisplay(EGL_DEFAULT_DISPLAY);
assert(d);
if (!eglInitialize(d, &maj, &min)) {
printf("demo: eglInitialize failed\n");
exit(1);
}
printf("EGL version = %d.%d\n", maj, min);
printf("EGL_VENDOR = %s\n", eglQueryString(d, EGL_VENDOR));
if (!strstr(eglQueryString(d, EGL_EXTENSIONS),
"EGL_MESA_screen_surface")) {
printf("EGL_MESA_screen_surface is not supported\n");
exit(1);
}
eglGetConfigs(d, configs, 10, &numConfigs);
printf("Got %d EGL configs:\n", numConfigs);
for (i = 0; i < numConfigs; i++) {
EGLint id, red, depth;
eglGetConfigAttrib(d, configs[i], EGL_CONFIG_ID, &id);
eglGetConfigAttrib(d, configs[i], EGL_RED_SIZE, &red);
eglGetConfigAttrib(d, configs[i], EGL_DEPTH_SIZE, &depth);
printf("%2d: Red Size = %d Depth Size = %d\n", id, red, depth);
}
eglGetScreensMESA(d, &screen, 1, &count);
eglGetModesMESA(d, screen, &mode, 1, &count);
eglBindAPI(EGL_OPENGL_API);
ctx = eglCreateContext(d, configs[0], EGL_NO_CONTEXT, NULL);
if (ctx == EGL_NO_CONTEXT) {
printf("failed to create context\n");
return 0;
}
pbuffer = eglCreatePbufferSurface(d, configs[0], pbufAttribs);
if (pbuffer == EGL_NO_SURFACE) {
printf("failed to create pbuffer\n");
return 0;
}
b = eglMakeCurrent(d, pbuffer, pbuffer, ctx);
if (!b) {
printf("make current failed\n");
return 0;
}
b = eglMakeCurrent(d, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
i = 0;
screenAttribs[i++] = EGL_WIDTH;
eglGetModeAttribMESA(d, mode, EGL_WIDTH, &screenAttribs[i++]);
screenAttribs[i++] = EGL_HEIGHT;
eglGetModeAttribMESA(d, mode, EGL_HEIGHT, &screenAttribs[i++]);
screenAttribs[i] = EGL_NONE;
screen_surf = eglCreateScreenSurfaceMESA(d, configs[0], screenAttribs);
if (screen_surf == EGL_NO_SURFACE) {
printf("failed to create screen surface\n");
return 0;
}
eglShowScreenSurfaceMESA(d, screen, screen_surf, mode);
b = eglMakeCurrent(d, screen_surf, screen_surf, ctx);
if (!b) {
printf("make current failed\n");
return 0;
}
glViewport(0, 0, 1024, 768);
glClearColor( 0,
1.0,
0,
1);
glClear( GL_COLOR_BUFFER_BIT );
TestScreens(d);
glShadeModel( GL_FLAT );
for (i = 0; i < 6; i++) {
redraw(d, screen_surf, i*10 );
printf("sleep(1)\n");
sleep(1);
}
eglDestroySurface(d, pbuffer);
eglDestroyContext(d, ctx);
eglTerminate(d);
return 0;
}
|
