swapinterval.cpp revision 6cf50a770dabd13cf5b72bb0a6fb9dd002c88db6 
1/*
2**
3** Copyright 2006, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18#define LOG_TAG "fillrate"
19
20#include <stdlib.h>
21#include <stdio.h>
22
23#include <EGL/egl.h>
24#include <GLES/gl.h>
25#include <GLES/glext.h>
26
27#include <utils/StopWatch.h>
28#include <ui/FramebufferNativeWindow.h>
29#include <ui/EGLUtils.h>
30
31using namespace android;
32
33int main(int argc, char** argv)
34{
35    EGLint configAttribs[] = {
36         EGL_DEPTH_SIZE, 0,
37         EGL_NONE
38     };
39
40     EGLint majorVersion;
41     EGLint minorVersion;
42     EGLContext context;
43     EGLConfig config;
44     EGLSurface surface;
45     EGLint w, h;
46     EGLDisplay dpy;
47
48     dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
49     eglInitialize(dpy, &majorVersion, &minorVersion);
50
51     EGLNativeWindowType window = android_createDisplaySurface();
52
53     status_t err = EGLUtils::selectConfigForNativeWindow(
54             dpy, configAttribs, window, &config);
55     if (err) {
56         fprintf(stderr, "couldn't find an EGLConfig matching the screen format\n");
57         return 0;
58     }
59
60     surface = eglCreateWindowSurface(dpy, config, window, NULL);
61     context = eglCreateContext(dpy, config, NULL, NULL);
62     eglMakeCurrent(dpy, surface, surface, context);
63     eglQuerySurface(dpy, surface, EGL_WIDTH, &w);
64     eglQuerySurface(dpy, surface, EGL_HEIGHT, &h);
65
66     printf("w=%d, h=%d\n", w, h);
67
68     glDisable(GL_DITHER);
69     glEnable(GL_BLEND);
70
71     glViewport(0, 0, w, h);
72     glOrthof(0, w, 0, h, 0, 1);
73
74     eglSwapInterval(dpy, 1);
75
76     glClearColor(1,0,0,0);
77     glClear(GL_COLOR_BUFFER_BIT);
78     eglSwapBuffers(dpy, surface);
79
80
81     int time = 10;
82     printf("screen should flash red/green quickly for %d s...\n", time);
83
84     int c = 0;
85     nsecs_t start = systemTime();
86     nsecs_t t;
87     do {
88         glClearColor(1,0,0,0);
89         glClear(GL_COLOR_BUFFER_BIT);
90         eglSwapBuffers(dpy, surface);
91         glClearColor(0,1,0,0);
92         glClear(GL_COLOR_BUFFER_BIT);
93         eglSwapBuffers(dpy, surface);
94         t = systemTime() - start;
95         c += 2;
96     } while (int(ns2s(t))<=time);
97
98     double p =  (double(t) / c) / 1000000000.0;
99     printf("refresh-rate is %f fps (%f ms)\n", 1.0f/p, p*1000.0);
100
101     eglTerminate(dpy);
102
103     return 0;
104}
105