1 2 /* 3 * Copyright 2011 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 #include <X11/Xlib.h> 9 #include <X11/Xatom.h> 10 #include <X11/XKBlib.h> 11 #include <GL/glx.h> 12 #include <GL/gl.h> 13 #include <GL/glu.h> 14 15 #include "SkWindow.h" 16 17 #include "SkBitmap.h" 18 #include "SkCanvas.h" 19 #include "SkColor.h" 20 #include "SkEvent.h" 21 #include "SkKey.h" 22 #include "SkWindow.h" 23 #include "XkeysToSkKeys.h" 24 extern "C" { 25 #include "keysym2ucs.h" 26 } 27 28 const int WIDTH = 500; 29 const int HEIGHT = 500; 30 31 // Determine which events to listen for. 32 const long EVENT_MASK = StructureNotifyMask|ButtonPressMask|ButtonReleaseMask 33 |ExposureMask|PointerMotionMask|KeyPressMask|KeyReleaseMask; 34 35 SkOSWindow::SkOSWindow(void*) 36 : fVi(NULL) 37 , fMSAASampleCount(0) { 38 fUnixWindow.fDisplay = NULL; 39 fUnixWindow.fGLContext = NULL; 40 this->initWindow(0, NULL); 41 this->resize(WIDTH, HEIGHT); 42 } 43 44 SkOSWindow::~SkOSWindow() { 45 this->closeWindow(); 46 } 47 48 void SkOSWindow::closeWindow() { 49 if (NULL != fUnixWindow.fDisplay) { 50 this->detach(); 51 SkASSERT(NULL != fUnixWindow.fGc); 52 XFreeGC(fUnixWindow.fDisplay, fUnixWindow.fGc); 53 fUnixWindow.fGc = NULL; 54 XDestroyWindow(fUnixWindow.fDisplay, fUnixWindow.fWin); 55 fVi = NULL; 56 XCloseDisplay(fUnixWindow.fDisplay); 57 fUnixWindow.fDisplay = NULL; 58 fMSAASampleCount = 0; 59 } 60 } 61 62 void SkOSWindow::initWindow(int requestedMSAASampleCount, AttachmentInfo* info) { 63 if (fMSAASampleCount != requestedMSAASampleCount) { 64 this->closeWindow(); 65 } 66 // presence of fDisplay means we already have a window 67 if (NULL != fUnixWindow.fDisplay) { 68 if (NULL != info) { 69 if (NULL != fVi) { 70 glXGetConfig(fUnixWindow.fDisplay, fVi, GLX_SAMPLES_ARB, &info->fSampleCount); 71 glXGetConfig(fUnixWindow.fDisplay, fVi, GLX_STENCIL_SIZE, &info->fStencilBits); 72 } else { 73 info->fSampleCount = 0; 74 info->fStencilBits = 0; 75 } 76 } 77 return; 78 } 79 fUnixWindow.fDisplay = XOpenDisplay(NULL); 80 Display* dsp = fUnixWindow.fDisplay; 81 if (NULL == dsp) { 82 SkDebugf("Could not open an X Display"); 83 return; 84 } 85 // Attempt to create a window that supports GL 86 GLint att[] = { 87 GLX_RGBA, 88 GLX_DEPTH_SIZE, 24, 89 GLX_DOUBLEBUFFER, 90 GLX_STENCIL_SIZE, 8, 91 None 92 }; 93 SkASSERT(NULL == fVi); 94 if (requestedMSAASampleCount > 0) { 95 static const GLint kAttCount = SK_ARRAY_COUNT(att); 96 GLint msaaAtt[kAttCount + 4]; 97 memcpy(msaaAtt, att, sizeof(att)); 98 SkASSERT(None == msaaAtt[kAttCount - 1]); 99 msaaAtt[kAttCount - 1] = GLX_SAMPLE_BUFFERS_ARB; 100 msaaAtt[kAttCount + 0] = 1; 101 msaaAtt[kAttCount + 1] = GLX_SAMPLES_ARB; 102 msaaAtt[kAttCount + 2] = requestedMSAASampleCount; 103 msaaAtt[kAttCount + 3] = None; 104 fVi = glXChooseVisual(dsp, DefaultScreen(dsp), msaaAtt); 105 fMSAASampleCount = requestedMSAASampleCount; 106 } 107 if (NULL == fVi) { 108 fVi = glXChooseVisual(dsp, DefaultScreen(dsp), att); 109 fMSAASampleCount = 0; 110 } 111 112 if (fVi) { 113 if (NULL != info) { 114 glXGetConfig(dsp, fVi, GLX_SAMPLES_ARB, &info->fSampleCount); 115 glXGetConfig(dsp, fVi, GLX_STENCIL_SIZE, &info->fStencilBits); 116 } 117 Colormap colorMap = XCreateColormap(dsp, 118 RootWindow(dsp, fVi->screen), 119 fVi->visual, 120 AllocNone); 121 XSetWindowAttributes swa; 122 swa.colormap = colorMap; 123 swa.event_mask = EVENT_MASK; 124 fUnixWindow.fWin = XCreateWindow(dsp, 125 RootWindow(dsp, fVi->screen), 126 0, 0, // x, y 127 WIDTH, HEIGHT, 128 0, // border width 129 fVi->depth, 130 InputOutput, 131 fVi->visual, 132 CWEventMask | CWColormap, 133 &swa); 134 } else { 135 if (NULL != info) { 136 info->fSampleCount = 0; 137 info->fStencilBits = 0; 138 } 139 // Create a simple window instead. We will not be able to show GL 140 fUnixWindow.fWin = XCreateSimpleWindow(dsp, 141 DefaultRootWindow(dsp), 142 0, 0, // x, y 143 WIDTH, HEIGHT, 144 0, // border width 145 0, // border value 146 0); // background value 147 } 148 this->mapWindowAndWait(); 149 fUnixWindow.fGc = XCreateGC(dsp, fUnixWindow.fWin, 0, NULL); 150 } 151 152 static unsigned getModi(const XEvent& evt) { 153 static const struct { 154 unsigned fXMask; 155 unsigned fSkMask; 156 } gModi[] = { 157 // X values found by experiment. Is there a better way? 158 { 1, kShift_SkModifierKey }, 159 { 4, kControl_SkModifierKey }, 160 { 8, kOption_SkModifierKey }, 161 }; 162 163 unsigned modi = 0; 164 for (size_t i = 0; i < SK_ARRAY_COUNT(gModi); ++i) { 165 if (evt.xkey.state & gModi[i].fXMask) { 166 modi |= gModi[i].fSkMask; 167 } 168 } 169 return modi; 170 } 171 172 static SkMSec gTimerDelay; 173 174 static bool MyXNextEventWithDelay(Display* dsp, XEvent* evt) { 175 SkMSec ms = gTimerDelay; 176 if (ms > 0) { 177 int x11_fd = ConnectionNumber(dsp); 178 fd_set input_fds; 179 FD_ZERO(&input_fds); 180 FD_SET(x11_fd, &input_fds); 181 182 timeval tv; 183 tv.tv_sec = ms / 1000; // seconds 184 tv.tv_usec = (ms % 1000) * 1000; // microseconds 185 186 if (!select(x11_fd + 1, &input_fds, NULL, NULL, &tv)) { 187 if (!XPending(dsp)) { 188 return false; 189 } 190 } 191 } 192 XNextEvent(dsp, evt); 193 return true; 194 } 195 196 SkOSWindow::NextXEventResult SkOSWindow::nextXEvent() { 197 XEvent evt; 198 Display* dsp = fUnixWindow.fDisplay; 199 200 if (!MyXNextEventWithDelay(fUnixWindow.fDisplay, &evt)) { 201 return kContinue_NextXEventResult; 202 } 203 204 switch (evt.type) { 205 case Expose: 206 if (0 == evt.xexpose.count) { 207 return kPaintRequest_NextXEventResult; 208 } 209 break; 210 case ConfigureNotify: 211 this->resize(evt.xconfigure.width, evt.xconfigure.height); 212 break; 213 case ButtonPress: 214 if (evt.xbutton.button == Button1) 215 this->handleClick(evt.xbutton.x, evt.xbutton.y, 216 SkView::Click::kDown_State, NULL, getModi(evt)); 217 break; 218 case ButtonRelease: 219 if (evt.xbutton.button == Button1) 220 this->handleClick(evt.xbutton.x, evt.xbutton.y, 221 SkView::Click::kUp_State, NULL, getModi(evt)); 222 break; 223 case MotionNotify: 224 this->handleClick(evt.xmotion.x, evt.xmotion.y, 225 SkView::Click::kMoved_State, NULL, getModi(evt)); 226 break; 227 case KeyPress: { 228 int shiftLevel = (evt.xkey.state & ShiftMask) ? 1 : 0; 229 KeySym keysym = XkbKeycodeToKeysym(dsp, evt.xkey.keycode, 230 0, shiftLevel); 231 if (keysym == XK_Escape) { 232 return kQuitRequest_NextXEventResult; 233 } 234 this->handleKey(XKeyToSkKey(keysym)); 235 long uni = keysym2ucs(keysym); 236 if (uni != -1) { 237 this->handleChar((SkUnichar) uni); 238 } 239 break; 240 } 241 case KeyRelease: 242 this->handleKeyUp(XKeyToSkKey(XkbKeycodeToKeysym(dsp, evt.xkey.keycode, 0, 0))); 243 break; 244 default: 245 // Do nothing for other events 246 break; 247 } 248 return kContinue_NextXEventResult; 249 } 250 251 void SkOSWindow::loop() { 252 Display* dsp = fUnixWindow.fDisplay; 253 if (NULL == dsp) { 254 return; 255 } 256 Window win = fUnixWindow.fWin; 257 258 XSelectInput(dsp, win, EVENT_MASK); 259 260 bool sentExposeEvent = false; 261 262 for (;;) { 263 SkEvent::ServiceQueueTimer(); 264 265 bool moreToDo = SkEvent::ProcessEvent(); 266 267 if (this->isDirty() && !sentExposeEvent) { 268 sentExposeEvent = true; 269 270 XEvent evt; 271 sk_bzero(&evt, sizeof(evt)); 272 evt.type = Expose; 273 evt.xexpose.display = dsp; 274 XSendEvent(dsp, win, false, ExposureMask, &evt); 275 } 276 277 if (XPending(dsp) || !moreToDo) { 278 switch (this->nextXEvent()) { 279 case kContinue_NextXEventResult: 280 break; 281 case kPaintRequest_NextXEventResult: 282 sentExposeEvent = false; 283 if (this->isDirty()) { 284 this->update(NULL); 285 } 286 this->doPaint(); 287 break; 288 case kQuitRequest_NextXEventResult: 289 return; 290 } 291 } 292 } 293 } 294 295 void SkOSWindow::mapWindowAndWait() { 296 SkASSERT(NULL != fUnixWindow.fDisplay); 297 Display* dsp = fUnixWindow.fDisplay; 298 Window win = fUnixWindow.fWin; 299 XMapWindow(dsp, win); 300 301 long eventMask = StructureNotifyMask; 302 XSelectInput(dsp, win, eventMask); 303 304 // Wait until screen is ready. 305 XEvent evt; 306 do { 307 XNextEvent(dsp, &evt); 308 } while(evt.type != MapNotify); 309 310 } 311 312 bool SkOSWindow::attach(SkBackEndTypes, int msaaSampleCount, AttachmentInfo* info) { 313 this->initWindow(msaaSampleCount, info); 314 315 if (NULL == fUnixWindow.fDisplay) { 316 return false; 317 } 318 if (NULL == fUnixWindow.fGLContext) { 319 SkASSERT(NULL != fVi); 320 321 fUnixWindow.fGLContext = glXCreateContext(fUnixWindow.fDisplay, 322 fVi, 323 NULL, 324 GL_TRUE); 325 if (NULL == fUnixWindow.fGLContext) { 326 return false; 327 } 328 } 329 glXMakeCurrent(fUnixWindow.fDisplay, 330 fUnixWindow.fWin, 331 fUnixWindow.fGLContext); 332 glViewport(0, 0, 333 SkScalarRound(this->width()), SkScalarRound(this->height())); 334 glClearColor(0, 0, 0, 0); 335 glClearStencil(0); 336 glClear(GL_COLOR_BUFFER_BIT | GL_STENCIL_BUFFER_BIT); 337 return true; 338 } 339 340 void SkOSWindow::detach() { 341 if (NULL == fUnixWindow.fDisplay || NULL == fUnixWindow.fGLContext) { 342 return; 343 } 344 glXMakeCurrent(fUnixWindow.fDisplay, None, NULL); 345 glXDestroyContext(fUnixWindow.fDisplay, fUnixWindow.fGLContext); 346 fUnixWindow.fGLContext = NULL; 347 } 348 349 void SkOSWindow::present() { 350 if (NULL != fUnixWindow.fDisplay && NULL != fUnixWindow.fGLContext) { 351 glXSwapBuffers(fUnixWindow.fDisplay, fUnixWindow.fWin); 352 } 353 } 354 355 void SkOSWindow::onSetTitle(const char title[]) { 356 if (NULL == fUnixWindow.fDisplay) { 357 return; 358 } 359 XTextProperty textProp; 360 textProp.value = (unsigned char*)title; 361 textProp.format = 8; 362 textProp.nitems = strlen((char*)textProp.value); 363 textProp.encoding = XA_STRING; 364 XSetWMName(fUnixWindow.fDisplay, fUnixWindow.fWin, &textProp); 365 } 366 367 static bool convertBitmapToXImage(XImage& image, const SkBitmap& bitmap) { 368 sk_bzero(&image, sizeof(image)); 369 370 int bitsPerPixel = bitmap.bytesPerPixel() * 8; 371 image.width = bitmap.width(); 372 image.height = bitmap.height(); 373 image.format = ZPixmap; 374 image.data = (char*) bitmap.getPixels(); 375 image.byte_order = LSBFirst; 376 image.bitmap_unit = bitsPerPixel; 377 image.bitmap_bit_order = LSBFirst; 378 image.bitmap_pad = bitsPerPixel; 379 image.depth = 24; 380 image.bytes_per_line = bitmap.rowBytes() - bitmap.width() * 4; 381 image.bits_per_pixel = bitsPerPixel; 382 return XInitImage(&image); 383 } 384 385 void SkOSWindow::doPaint() { 386 if (NULL == fUnixWindow.fDisplay) { 387 return; 388 } 389 // If we are drawing with GL, we don't need XPutImage. 390 if (NULL != fUnixWindow.fGLContext) { 391 return; 392 } 393 // Draw the bitmap to the screen. 394 const SkBitmap& bitmap = getBitmap(); 395 int width = bitmap.width(); 396 int height = bitmap.height(); 397 398 XImage image; 399 if (!convertBitmapToXImage(image, bitmap)) { 400 return; 401 } 402 403 XPutImage(fUnixWindow.fDisplay, 404 fUnixWindow.fWin, 405 fUnixWindow.fGc, 406 &image, 407 0, 0, // src x,y 408 0, 0, // dst x,y 409 width, height); 410 } 411 412 /////////////////////////////////////////////////////////////////////////////// 413 414 void SkEvent::SignalNonEmptyQueue() { 415 // nothing to do, since we spin on our event-queue, polling for XPending 416 } 417 418 void SkEvent::SignalQueueTimer(SkMSec delay) { 419 // just need to record the delay time. We handle waking up for it in 420 // MyXNextEventWithDelay() 421 gTimerDelay = delay; 422 } 423
