Zack Rusin | 544dd4b | 2009-05-01 12:41:38 -0400 | [diff] [blame] | 1 | #include <assert.h> |
| 2 | #include <math.h> |
| 3 | #include <stdlib.h> |
| 4 | #include <stdio.h> |
| 5 | #include <string.h> |
| 6 | #include <X11/Xlib.h> |
| 7 | #include <X11/Xutil.h> |
| 8 | #include <X11/keysym.h> |
| 9 | #include <VG/openvg.h> |
| 10 | #include <GLES/egl.h> |
| 11 | |
| 12 | #include "lion-render.h" |
| 13 | |
| 14 | static VGint width, height; |
| 15 | struct lion *lion = 0; |
| 16 | VGfloat angle = 0; |
| 17 | |
| 18 | static void |
| 19 | draw(void) |
| 20 | { |
| 21 | vgClear(0, 0, width, height); |
| 22 | |
| 23 | vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE); |
| 24 | vgLoadIdentity(); |
| 25 | vgTranslate(width/2, height/2); |
| 26 | vgRotate(angle); |
| 27 | vgTranslate(-width/2, -height/2); |
| 28 | |
| 29 | lion_render(lion); |
| 30 | |
| 31 | ++angle; |
| 32 | } |
| 33 | |
| 34 | |
| 35 | /* new window size or exposure */ |
| 36 | static void |
| 37 | reshape(int w, int h) |
| 38 | { |
| 39 | width = w; |
| 40 | height = h; |
| 41 | } |
| 42 | |
| 43 | |
| 44 | static void |
| 45 | init(void) |
| 46 | { |
| 47 | float clear_color[4] = {1.0, 1.0, 1.0, 1.0}; |
| 48 | vgSetfv(VG_CLEAR_COLOR, 4, clear_color); |
| 49 | |
| 50 | lion = lion_create(); |
| 51 | } |
| 52 | |
| 53 | |
| 54 | /* |
| 55 | * Create an RGB, double-buffered X window. |
| 56 | * Return the window and context handles. |
| 57 | */ |
| 58 | static void |
| 59 | make_x_window(Display *x_dpy, EGLDisplay egl_dpy, |
| 60 | const char *name, |
| 61 | int x, int y, int width, int height, |
| 62 | Window *winRet, |
| 63 | EGLContext *ctxRet, |
| 64 | EGLSurface *surfRet) |
| 65 | { |
| 66 | static const EGLint attribs[] = { |
| 67 | EGL_RED_SIZE, 1, |
| 68 | EGL_GREEN_SIZE, 1, |
| 69 | EGL_BLUE_SIZE, 1, |
Chia-I Wu | 033bd95 | 2010-01-02 21:51:46 +0800 | [diff] [blame] | 70 | EGL_RENDERABLE_TYPE, EGL_OPENVG_BIT, |
Zack Rusin | 544dd4b | 2009-05-01 12:41:38 -0400 | [diff] [blame] | 71 | EGL_NONE |
| 72 | }; |
| 73 | |
| 74 | int scrnum; |
| 75 | XSetWindowAttributes attr; |
| 76 | unsigned long mask; |
| 77 | Window root; |
| 78 | Window win; |
| 79 | XVisualInfo *visInfo, visTemplate; |
| 80 | int num_visuals; |
| 81 | EGLContext ctx; |
| 82 | EGLConfig config; |
| 83 | EGLint num_configs; |
| 84 | EGLint vid; |
| 85 | |
| 86 | scrnum = DefaultScreen( x_dpy ); |
| 87 | root = RootWindow( x_dpy, scrnum ); |
| 88 | |
Chia-I Wu | 3bcb08f | 2010-01-02 21:56:13 +0800 | [diff] [blame] | 89 | if (!eglChooseConfig( egl_dpy, attribs, &config, 1, &num_configs) || |
| 90 | !num_configs) { |
Zack Rusin | 544dd4b | 2009-05-01 12:41:38 -0400 | [diff] [blame] | 91 | printf("Error: couldn't get an EGL visual config\n"); |
| 92 | exit(1); |
| 93 | } |
| 94 | |
| 95 | assert(config); |
Zack Rusin | 544dd4b | 2009-05-01 12:41:38 -0400 | [diff] [blame] | 96 | |
| 97 | if (!eglGetConfigAttrib(egl_dpy, config, EGL_NATIVE_VISUAL_ID, &vid)) { |
| 98 | printf("Error: eglGetConfigAttrib() failed\n"); |
| 99 | exit(1); |
| 100 | } |
| 101 | |
| 102 | /* The X window visual must match the EGL config */ |
| 103 | visTemplate.visualid = vid; |
| 104 | visInfo = XGetVisualInfo(x_dpy, VisualIDMask, &visTemplate, &num_visuals); |
| 105 | if (!visInfo) { |
| 106 | printf("Error: couldn't get X visual\n"); |
| 107 | exit(1); |
| 108 | } |
| 109 | |
| 110 | /* window attributes */ |
| 111 | attr.background_pixel = 0; |
| 112 | attr.border_pixel = 0; |
| 113 | attr.colormap = XCreateColormap( x_dpy, root, visInfo->visual, AllocNone); |
| 114 | attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask; |
| 115 | mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask; |
| 116 | |
| 117 | win = XCreateWindow( x_dpy, root, 0, 0, width, height, |
| 118 | 0, visInfo->depth, InputOutput, |
| 119 | visInfo->visual, mask, &attr ); |
| 120 | |
| 121 | /* set hints and properties */ |
| 122 | { |
| 123 | XSizeHints sizehints; |
| 124 | sizehints.x = x; |
| 125 | sizehints.y = y; |
| 126 | sizehints.width = width; |
| 127 | sizehints.height = height; |
| 128 | sizehints.flags = USSize | USPosition; |
| 129 | XSetNormalHints(x_dpy, win, &sizehints); |
| 130 | XSetStandardProperties(x_dpy, win, name, name, |
| 131 | None, (char **)NULL, 0, &sizehints); |
| 132 | } |
| 133 | |
| 134 | eglBindAPI(EGL_OPENVG_API); |
| 135 | |
| 136 | ctx = eglCreateContext(egl_dpy, config, EGL_NO_CONTEXT, NULL ); |
| 137 | if (!ctx) { |
| 138 | printf("Error: eglCreateContext failed\n"); |
| 139 | exit(1); |
| 140 | } |
| 141 | |
| 142 | *surfRet = eglCreateWindowSurface(egl_dpy, config, win, NULL); |
| 143 | |
| 144 | if (!*surfRet) { |
| 145 | printf("Error: eglCreateWindowSurface failed\n"); |
| 146 | exit(1); |
| 147 | } |
| 148 | |
| 149 | XFree(visInfo); |
| 150 | |
| 151 | *winRet = win; |
| 152 | *ctxRet = ctx; |
| 153 | } |
| 154 | |
| 155 | |
| 156 | static void |
| 157 | event_loop(Display *dpy, Window win, |
| 158 | EGLDisplay egl_dpy, EGLSurface egl_surf) |
| 159 | { |
| 160 | while (1) { |
| 161 | XEvent event; |
| 162 | |
| 163 | while (XPending(dpy) > 0) { |
| 164 | XNextEvent(dpy, &event); |
| 165 | |
| 166 | switch (event.type) { |
| 167 | case Expose: |
| 168 | break; |
| 169 | case ConfigureNotify: |
| 170 | reshape(event.xconfigure.width, event.xconfigure.height); |
| 171 | break; |
| 172 | case KeyPress: |
| 173 | { |
| 174 | char buffer[10]; |
| 175 | int r, code; |
| 176 | code = XLookupKeysym(&event.xkey, 0); |
| 177 | r = XLookupString(&event.xkey, buffer, sizeof(buffer), |
| 178 | NULL, NULL); |
| 179 | if (buffer[0] == 27) { |
| 180 | /* escape */ |
| 181 | return; |
| 182 | } |
| 183 | } |
| 184 | break; |
| 185 | default: |
| 186 | ; /*no-op*/ |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | draw(); |
| 191 | eglSwapBuffers(egl_dpy, egl_surf); |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | |
| 196 | static void |
| 197 | usage(void) |
| 198 | { |
| 199 | printf("Usage:\n"); |
| 200 | printf(" -display <displayname> set the display to run on\n"); |
| 201 | printf(" -info display OpenGL renderer info\n"); |
| 202 | } |
| 203 | |
| 204 | int |
| 205 | main(int argc, char *argv[]) |
| 206 | { |
| 207 | const int winWidth = 350, winHeight = 450; |
| 208 | Display *x_dpy; |
| 209 | Window win; |
| 210 | EGLSurface egl_surf; |
| 211 | EGLContext egl_ctx; |
| 212 | EGLDisplay egl_dpy; |
| 213 | char *dpyName = NULL; |
| 214 | GLboolean printInfo = GL_FALSE; |
| 215 | EGLint egl_major, egl_minor; |
| 216 | int i; |
| 217 | const char *s; |
| 218 | |
| 219 | for (i = 1; i < argc; i++) { |
| 220 | if (strcmp(argv[i], "-display") == 0) { |
| 221 | dpyName = argv[i+1]; |
| 222 | i++; |
| 223 | } |
| 224 | else if (strcmp(argv[i], "-info") == 0) { |
| 225 | printInfo = GL_TRUE; |
| 226 | } |
| 227 | else { |
| 228 | usage(); |
| 229 | return -1; |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | x_dpy = XOpenDisplay(dpyName); |
| 234 | if (!x_dpy) { |
| 235 | printf("Error: couldn't open display %s\n", |
| 236 | dpyName ? dpyName : getenv("DISPLAY")); |
| 237 | return -1; |
| 238 | } |
| 239 | |
| 240 | egl_dpy = eglGetDisplay(x_dpy); |
| 241 | if (!egl_dpy) { |
| 242 | printf("Error: eglGetDisplay() failed\n"); |
| 243 | return -1; |
| 244 | } |
| 245 | |
| 246 | if (!eglInitialize(egl_dpy, &egl_major, &egl_minor)) { |
| 247 | printf("Error: eglInitialize() failed\n"); |
| 248 | return -1; |
| 249 | } |
| 250 | |
| 251 | s = eglQueryString(egl_dpy, EGL_VERSION); |
| 252 | printf("EGL_VERSION = %s\n", s); |
| 253 | |
| 254 | make_x_window(x_dpy, egl_dpy, |
| 255 | "Lion Example", 0, 0, winWidth, winHeight, |
| 256 | &win, &egl_ctx, &egl_surf); |
| 257 | |
| 258 | XMapWindow(x_dpy, win); |
| 259 | if (!eglMakeCurrent(egl_dpy, egl_surf, egl_surf, egl_ctx)) { |
| 260 | printf("Error: eglMakeCurrent() failed\n"); |
| 261 | return -1; |
| 262 | } |
| 263 | |
| 264 | if (printInfo) { |
| 265 | printf("VG_RENDERER = %s\n", (char *) vgGetString(VG_RENDERER)); |
| 266 | printf("VG_VERSION = %s\n", (char *) vgGetString(VG_VERSION)); |
| 267 | printf("VG_VENDOR = %s\n", (char *) vgGetString(VG_VENDOR)); |
| 268 | } |
| 269 | |
| 270 | init(); |
| 271 | |
| 272 | /* Set initial projection/viewing transformation. |
| 273 | * We can't be sure we'll get a ConfigureNotify event when the window |
| 274 | * first appears. |
| 275 | */ |
| 276 | reshape(winWidth, winHeight); |
| 277 | |
| 278 | event_loop(x_dpy, win, egl_dpy, egl_surf); |
| 279 | |
| 280 | eglDestroyContext(egl_dpy, egl_ctx); |
| 281 | eglDestroySurface(egl_dpy, egl_surf); |
| 282 | eglTerminate(egl_dpy); |
| 283 | |
| 284 | |
| 285 | XDestroyWindow(x_dpy, win); |
| 286 | XCloseDisplay(x_dpy); |
| 287 | |
| 288 | return 0; |
| 289 | } |