swapinterval.cpp revision bb99ffb4db008441e6ac4236d8a48b6e2b0c01d9
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 30using namespace android; 31 32int main(int argc, char** argv) 33{ 34 EGLint configAttribs[] = { 35 EGL_DEPTH_SIZE, 0, 36 EGL_NONE 37 }; 38 39 EGLint numConfigs = -1, n=0; 40 EGLint majorVersion; 41 EGLint minorVersion; 42 EGLConfig config; 43 EGLContext context; 44 EGLSurface surface; 45 EGLint w, h; 46 47 EGLDisplay dpy; 48 49 dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY); 50 eglInitialize(dpy, &majorVersion, &minorVersion); 51 52 // Get all the "potential match" configs... 53 eglGetConfigs(dpy, NULL, 0, &numConfigs); 54 EGLConfig* const configs = (EGLConfig*)malloc(sizeof(EGLConfig)*numConfigs); 55 eglChooseConfig(dpy, configAttribs, configs, numConfigs, &n); 56 config = configs[0]; 57 if (n > 1) { 58 // if there is more than one candidate, go through the list 59 // and pick one that matches our framebuffer format 60 int fbSzA = 0; // should not hardcode 61 int fbSzR = 5; // should not hardcode 62 int fbSzG = 6; // should not hardcode 63 int fbSzB = 5; // should not hardcode 64 int i; 65 for (i=0 ; i<n ; i++) { 66 EGLint r,g,b,a; 67 eglGetConfigAttrib(dpy, configs[i], EGL_RED_SIZE, &r); 68 eglGetConfigAttrib(dpy, configs[i], EGL_GREEN_SIZE, &g); 69 eglGetConfigAttrib(dpy, configs[i], EGL_BLUE_SIZE, &b); 70 eglGetConfigAttrib(dpy, configs[i], EGL_ALPHA_SIZE, &a); 71 if (fbSzA == a && fbSzR == r && fbSzG == g && fbSzB == b) { 72 config = configs[i]; 73 break; 74 } 75 } 76 } 77 free(configs); 78 79 surface = eglCreateWindowSurface(dpy, config, 80 android_createDisplaySurface(), NULL); 81 context = eglCreateContext(dpy, config, NULL, NULL); 82 eglMakeCurrent(dpy, surface, surface, context); 83 eglQuerySurface(dpy, surface, EGL_WIDTH, &w); 84 eglQuerySurface(dpy, surface, EGL_HEIGHT, &h); 85 86 printf("w=%d, h=%d\n", w, h); 87 88 glDisable(GL_DITHER); 89 glEnable(GL_BLEND); 90 91 glViewport(0, 0, w, h); 92 glOrthof(0, w, 0, h, 0, 1); 93 94 eglSwapInterval(dpy, 1); 95 96 glClearColor(1,0,0,0); 97 glClear(GL_COLOR_BUFFER_BIT); 98 eglSwapBuffers(dpy, surface); 99 100 101 int time = 10; 102 printf("screen should flash red/green quickly for %d s...\n", time); 103 104 int c = 0; 105 nsecs_t start = systemTime(); 106 nsecs_t t; 107 do { 108 glClearColor(1,0,0,0); 109 glClear(GL_COLOR_BUFFER_BIT); 110 eglSwapBuffers(dpy, surface); 111 glClearColor(0,1,0,0); 112 glClear(GL_COLOR_BUFFER_BIT); 113 eglSwapBuffers(dpy, surface); 114 t = systemTime() - start; 115 c += 2; 116 } while (int(ns2s(t))<=time); 117 118 double p = (double(t) / c) / 1000000000.0; 119 printf("refresh-rate is %f fps (%f ms)\n", 1.0f/p, p*1000.0); 120 121 eglTerminate(dpy); 122 123 return 0; 124} 125