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 #include <unistd.h>
19 #include <stdlib.h>
20 #include <stdio.h>
21
22 #include <EGL/egl.h>
23 #include <GLES/gl.h>
24 #include <GLES/glext.h>
25
26 #include <utils/StopWatch.h>
27 #include <WindowSurface.h>
28 #include <EGLUtils.h>
29
30 using namespace android;
31
main(int,char **)32 int main(int /*argc*/, char** /*argv*/)
33 {
34 EGLint configAttribs[] = {
35 EGL_DEPTH_SIZE, 0,
36 EGL_NONE
37 };
38
39 EGLint majorVersion;
40 EGLint minorVersion;
41 EGLContext context;
42 EGLConfig config;
43 EGLSurface surface;
44 EGLint w, h;
45 EGLDisplay dpy;
46
47 WindowSurface windowSurface;
48 EGLNativeWindowType window = windowSurface.getSurface();
49
50 dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
51 eglInitialize(dpy, &majorVersion, &minorVersion);
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 glBindTexture(GL_TEXTURE_2D, 0);
69 glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
70 glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
71 glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
72 glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
73 glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
74 glDisable(GL_DITHER);
75 glDisable(GL_BLEND);
76 glEnable(GL_TEXTURE_2D);
77 glColor4f(1,1,1,1);
78
79
80 // default pack-alignment is 4
81 const uint16_t t16[64] = { 0xFFFF, 0, 0xF800, 0, 0x07E0, 0, 0x001F, 0 };
82
83 const GLfloat fh = h;
84 const GLfloat fw2 = w/2;
85 const GLfloat vertices[4][2] = {
86 { fw2, 0 },
87 { fw2, fh }
88 };
89
90 const GLfloat texCoords[4][2] = {
91 { 0, 0 },
92 { 1, 1 }
93 };
94
95 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 4, 0, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, t16);
96
97 glViewport(0, 0, w, h);
98 glMatrixMode(GL_PROJECTION);
99 glLoadIdentity();
100 glOrthof(0, w, 0, h, 0, 1);
101
102 glEnableClientState(GL_VERTEX_ARRAY);
103 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
104 glVertexPointer(2, GL_FLOAT, 0, vertices);
105 glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
106
107 glClearColor(0,0,0,0);
108 glClear(GL_COLOR_BUFFER_BIT);
109 glDrawArrays(GL_LINES, 0, 2);
110 eglSwapBuffers(dpy, surface);
111
112 usleep(5*1000000);
113
114 eglTerminate(dpy);
115
116 return 0;
117 }
118