| /* |
| * Copyright (C) 2008 Tunsgten Graphics,Inc. All Rights Reserved. |
| */ |
| |
| /* |
| * Test GL_OES_draw_texture |
| * Brian Paul |
| * August 2008 |
| */ |
| |
| #define GL_GLEXT_PROTOTYPES |
| |
| #include <assert.h> |
| #include <math.h> |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <X11/Xlib.h> |
| #include <X11/Xutil.h> |
| #include <X11/keysym.h> |
| #include <GLES/gl.h> |
| #include <GLES/glext.h> |
| #include <EGL/egl.h> |
| |
| |
| |
| static GLfloat view_posx = 10.0, view_posy = 20.0; |
| static GLfloat width = 200, height = 200; |
| |
| |
| static void |
| draw(void) |
| { |
| glClear(GL_COLOR_BUFFER_BIT); |
| |
| glDrawTexfOES(view_posx, view_posy, 0.0, width, height); |
| } |
| |
| |
| /* new window size or exposure */ |
| static void |
| reshape(int width, int height) |
| { |
| GLfloat ar = (GLfloat) width / (GLfloat) height; |
| |
| glViewport(0, 0, (GLint) width, (GLint) height); |
| |
| glMatrixMode(GL_PROJECTION); |
| glLoadIdentity(); |
| |
| #ifdef GL_VERSION_ES_CM_1_0 |
| glFrustumf(-ar, ar, -1, 1, 5.0, 60.0); |
| #else |
| glFrustum(-ar, ar, -1, 1, 5.0, 60.0); |
| #endif |
| |
| glMatrixMode(GL_MODELVIEW); |
| glLoadIdentity(); |
| glTranslatef(0.0, 0.0, -15.0); |
| } |
| |
| |
| static float |
| dist(GLuint i, GLuint j, float x, float y) |
| { |
| return sqrt((i-x) * (i-x) + (j-y) * (j-y)); |
| } |
| |
| static void |
| make_smile_texture(void) |
| { |
| #define SZ 128 |
| GLenum Filter = GL_LINEAR; |
| GLubyte image[SZ][SZ][4]; |
| GLuint i, j; |
| GLint cropRect[4]; |
| |
| for (i = 0; i < SZ; i++) { |
| for (j = 0; j < SZ; j++) { |
| GLfloat d_mouth = dist(i, j, SZ/2, SZ/2); |
| GLfloat d_rt_eye = dist(i, j, SZ*3/4, SZ*3/4); |
| GLfloat d_lt_eye = dist(i, j, SZ*3/4, SZ*1/4); |
| if (d_rt_eye < SZ / 8 || d_lt_eye < SZ / 8) { |
| image[i][j][0] = 20; |
| image[i][j][1] = 50; |
| image[i][j][2] = 255; |
| image[i][j][3] = 255; |
| } |
| else if (i < SZ/2 && d_mouth < SZ/3) { |
| image[i][j][0] = 255; |
| image[i][j][1] = 20; |
| image[i][j][2] = 20; |
| image[i][j][3] = 255; |
| } |
| else { |
| image[i][j][0] = 200; |
| image[i][j][1] = 200; |
| image[i][j][2] = 200; |
| image[i][j][3] = 255; |
| } |
| } |
| } |
| |
| glActiveTexture(GL_TEXTURE0); /* unit 0 */ |
| glBindTexture(GL_TEXTURE_2D, 42); |
| glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, SZ, SZ, 0, |
| GL_RGBA, GL_UNSIGNED_BYTE, image); |
| glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, Filter); |
| glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, Filter); |
| glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); |
| glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); |
| |
| cropRect[0] = 0; |
| cropRect[1] = 0; |
| cropRect[2] = SZ; |
| cropRect[3] = SZ; |
| glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_CROP_RECT_OES, cropRect); |
| #undef SZ |
| } |
| |
| |
| |
| static void |
| init(void) |
| { |
| const char *ext = (char *) glGetString(GL_EXTENSIONS); |
| |
| if (!strstr(ext, "GL_OES_draw_texture")) { |
| fprintf(stderr, "Sorry, this program requires GL_OES_draw_texture"); |
| exit(1); |
| } |
| |
| glClearColor(0.4, 0.4, 0.4, 0.0); |
| |
| make_smile_texture(); |
| glEnable(GL_TEXTURE_2D); |
| } |
| |
| |
| /* |
| * Create an RGB, double-buffered X window. |
| * Return the window and context handles. |
| */ |
| static void |
| make_x_window(Display *x_dpy, EGLDisplay egl_dpy, |
| const char *name, |
| int x, int y, int width, int height, |
| Window *winRet, |
| EGLContext *ctxRet, |
| EGLSurface *surfRet) |
| { |
| static const EGLint attribs[] = { |
| EGL_RED_SIZE, 1, |
| EGL_GREEN_SIZE, 1, |
| EGL_BLUE_SIZE, 1, |
| EGL_NONE |
| }; |
| |
| int scrnum; |
| XSetWindowAttributes attr; |
| unsigned long mask; |
| Window root; |
| Window win; |
| XVisualInfo *visInfo, visTemplate; |
| int num_visuals; |
| EGLContext ctx; |
| EGLConfig config; |
| EGLint num_configs; |
| EGLint vid; |
| |
| scrnum = DefaultScreen( x_dpy ); |
| root = RootWindow( x_dpy, scrnum ); |
| |
| if (!eglChooseConfig( egl_dpy, attribs, &config, 1, &num_configs)) { |
| printf("Error: couldn't get an EGL visual config\n"); |
| exit(1); |
| } |
| |
| assert(config); |
| assert(num_configs > 0); |
| |
| if (!eglGetConfigAttrib(egl_dpy, config, EGL_NATIVE_VISUAL_ID, &vid)) { |
| printf("Error: eglGetConfigAttrib() failed\n"); |
| exit(1); |
| } |
| |
| /* The X window visual must match the EGL config */ |
| visTemplate.visualid = vid; |
| visInfo = XGetVisualInfo(x_dpy, VisualIDMask, &visTemplate, &num_visuals); |
| if (!visInfo) { |
| printf("Error: couldn't get X visual\n"); |
| exit(1); |
| } |
| |
| /* window attributes */ |
| attr.background_pixel = 0; |
| attr.border_pixel = 0; |
| attr.colormap = XCreateColormap( x_dpy, root, visInfo->visual, AllocNone); |
| attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask; |
| mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask; |
| |
| win = XCreateWindow( x_dpy, root, 0, 0, width, height, |
| 0, visInfo->depth, InputOutput, |
| visInfo->visual, mask, &attr ); |
| |
| /* set hints and properties */ |
| { |
| XSizeHints sizehints; |
| sizehints.x = x; |
| sizehints.y = y; |
| sizehints.width = width; |
| sizehints.height = height; |
| sizehints.flags = USSize | USPosition; |
| XSetNormalHints(x_dpy, win, &sizehints); |
| XSetStandardProperties(x_dpy, win, name, name, |
| None, (char **)NULL, 0, &sizehints); |
| } |
| |
| eglBindAPI(EGL_OPENGL_ES_API); |
| |
| ctx = eglCreateContext(egl_dpy, config, EGL_NO_CONTEXT, NULL ); |
| if (!ctx) { |
| printf("Error: eglCreateContext failed\n"); |
| exit(1); |
| } |
| |
| *surfRet = eglCreateWindowSurface(egl_dpy, config, win, NULL); |
| |
| if (!*surfRet) { |
| printf("Error: eglCreateWindowSurface failed\n"); |
| exit(1); |
| } |
| |
| XFree(visInfo); |
| |
| *winRet = win; |
| *ctxRet = ctx; |
| } |
| |
| |
| static void |
| event_loop(Display *dpy, Window win, |
| EGLDisplay egl_dpy, EGLSurface egl_surf) |
| { |
| int anim = 0; |
| |
| while (1) { |
| int redraw = 0; |
| |
| if (!anim || XPending(dpy)) { |
| XEvent event; |
| XNextEvent(dpy, &event); |
| |
| switch (event.type) { |
| case Expose: |
| redraw = 1; |
| break; |
| case ConfigureNotify: |
| reshape(event.xconfigure.width, event.xconfigure.height); |
| break; |
| case KeyPress: |
| { |
| char buffer[10]; |
| int r, code; |
| code = XLookupKeysym(&event.xkey, 0); |
| if (code == XK_Left) { |
| view_posx -= 1.0; |
| } |
| else if (code == XK_Right) { |
| view_posx += 1.0; |
| } |
| else if (code == XK_Up) { |
| view_posy += 1.0; |
| } |
| else if (code == XK_Down) { |
| view_posy -= 1.0; |
| } |
| else { |
| r = XLookupString(&event.xkey, buffer, sizeof(buffer), |
| NULL, NULL); |
| if (buffer[0] == ' ') { |
| anim = !anim; |
| } |
| else if (buffer[0] == 'w') { |
| width -= 1.0f; |
| } |
| else if (buffer[0] == 'W') { |
| width += 1.0f; |
| } |
| else if (buffer[0] == 'h') { |
| height -= 1.0f; |
| } |
| else if (buffer[0] == 'H') { |
| height += 1.0f; |
| } |
| else if (buffer[0] == 27) { |
| /* escape */ |
| return; |
| } |
| } |
| } |
| redraw = 1; |
| break; |
| default: |
| ; /*no-op*/ |
| } |
| } |
| |
| if (anim) { |
| view_posx += 1.0; |
| view_posy += 2.0; |
| redraw = 1; |
| } |
| |
| if (redraw) { |
| draw(); |
| eglSwapBuffers(egl_dpy, egl_surf); |
| } |
| } |
| } |
| |
| |
| static void |
| usage(void) |
| { |
| printf("Usage:\n"); |
| printf(" -display <displayname> set the display to run on\n"); |
| printf(" -info display OpenGL renderer info\n"); |
| } |
| |
| |
| int |
| main(int argc, char *argv[]) |
| { |
| const int winWidth = 400, winHeight = 300; |
| Display *x_dpy; |
| Window win; |
| EGLSurface egl_surf; |
| EGLContext egl_ctx; |
| EGLDisplay egl_dpy; |
| char *dpyName = NULL; |
| GLboolean printInfo = GL_FALSE; |
| EGLint egl_major, egl_minor; |
| int i; |
| const char *s; |
| |
| for (i = 1; i < argc; i++) { |
| if (strcmp(argv[i], "-display") == 0) { |
| dpyName = argv[i+1]; |
| i++; |
| } |
| else if (strcmp(argv[i], "-info") == 0) { |
| printInfo = GL_TRUE; |
| } |
| else { |
| usage(); |
| return -1; |
| } |
| } |
| |
| x_dpy = XOpenDisplay(dpyName); |
| if (!x_dpy) { |
| printf("Error: couldn't open display %s\n", |
| dpyName ? dpyName : getenv("DISPLAY")); |
| return -1; |
| } |
| |
| egl_dpy = eglGetDisplay(x_dpy); |
| if (!egl_dpy) { |
| printf("Error: eglGetDisplay() failed\n"); |
| return -1; |
| } |
| |
| if (!eglInitialize(egl_dpy, &egl_major, &egl_minor)) { |
| printf("Error: eglInitialize() failed\n"); |
| return -1; |
| } |
| |
| s = eglQueryString(egl_dpy, EGL_VERSION); |
| printf("EGL_VERSION = %s\n", s); |
| |
| s = eglQueryString(egl_dpy, EGL_VENDOR); |
| printf("EGL_VENDOR = %s\n", s); |
| |
| s = eglQueryString(egl_dpy, EGL_EXTENSIONS); |
| printf("EGL_EXTENSIONS = %s\n", s); |
| |
| s = eglQueryString(egl_dpy, EGL_CLIENT_APIS); |
| printf("EGL_CLIENT_APIS = %s\n", s); |
| |
| make_x_window(x_dpy, egl_dpy, |
| "drawtex", 0, 0, winWidth, winHeight, |
| &win, &egl_ctx, &egl_surf); |
| |
| XMapWindow(x_dpy, win); |
| if (!eglMakeCurrent(egl_dpy, egl_surf, egl_surf, egl_ctx)) { |
| printf("Error: eglMakeCurrent() failed\n"); |
| return -1; |
| } |
| |
| if (printInfo) { |
| printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER)); |
| printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION)); |
| printf("GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR)); |
| printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS)); |
| } |
| |
| init(); |
| |
| /* Set initial projection/viewing transformation. |
| * We can't be sure we'll get a ConfigureNotify event when the window |
| * first appears. |
| */ |
| reshape(winWidth, winHeight); |
| |
| event_loop(x_dpy, win, egl_dpy, egl_surf); |
| |
| eglDestroyContext(egl_dpy, egl_ctx); |
| eglDestroySurface(egl_dpy, egl_surf); |
| eglTerminate(egl_dpy); |
| |
| |
| XDestroyWindow(x_dpy, win); |
| XCloseDisplay(x_dpy); |
| |
| return 0; |
| } |