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| 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 "gl/SkGLContext.h" | |
| 9 | |
| 10 #include <X11/Xlib.h> | |
| 11 #include <GL/glx.h> | |
| 12 #include <GL/glu.h> | |
| 13 | |
| 14 namespace { | |
| 15 | |
| 16 /* Note: Skia requires glx 1.3 or newer */ | |
| 17 | |
| 18 /* This struct is taken from a mesa demo. Please update as required */ | |
| 19 static const struct { int major, minor; } gl_versions[] = { | |
| 20 {1, 0}, | |
| 21 {1, 1}, | |
| 22 {1, 2}, | |
| 23 {1, 3}, | |
| 24 {1, 4}, | |
| 25 {1, 5}, | |
| 26 {2, 0}, | |
| 27 {2, 1}, | |
| 28 {3, 0}, | |
| 29 {3, 1}, | |
| 30 {3, 2}, | |
| 31 {3, 3}, | |
| 32 {4, 0}, | |
| 33 {4, 1}, | |
| 34 {4, 2}, | |
| 35 {4, 3}, | |
| 36 {4, 4}, | |
| 37 {0, 0} /* end of list */ | |
| 38 }; | |
| 39 #define NUM_GL_VERSIONS SK_ARRAY_COUNT(gl_versions) | |
| 40 | |
| 41 static bool ctxErrorOccurred = false; | |
| 42 static int ctxErrorHandler(Display *dpy, XErrorEvent *ev) { | |
| 43 ctxErrorOccurred = true; | |
| 44 return 0; | |
| 45 } | |
| 46 | |
| 47 class GLXGLContext : public SkGLContext { | |
| 48 public: | |
| 49 GLXGLContext(); | |
| 50 | |
| 51 virtual ~GLXGLContext(); | |
| 52 | |
| 53 virtual void makeCurrent() const SK_OVERRIDE; | |
| 54 virtual void swapBuffers() const SK_OVERRIDE; | |
| 55 protected: | |
| 56 virtual const GrGLInterface* createGLContext(GrGLStandard forcedGpuAPI) SK_O
VERRIDE; | |
| 57 virtual void destroyGLContext() SK_OVERRIDE; | |
| 58 | |
| 59 private: | |
| 60 GLXContext fContext; | |
| 61 Display* fDisplay; | |
| 62 Pixmap fPixmap; | |
| 63 GLXPixmap fGlxPixmap; | |
| 64 }; | |
| 65 | |
| 66 GLXGLContext::GLXGLContext() | |
| 67 : fContext(NULL) | |
| 68 , fDisplay(NULL) | |
| 69 , fPixmap(0) | |
| 70 , fGlxPixmap(0) { | |
| 71 } | |
| 72 | |
| 73 GLXGLContext::~GLXGLContext() { | |
| 74 this->destroyGLContext(); | |
| 75 } | |
| 76 | |
| 77 void GLXGLContext::destroyGLContext() { | |
| 78 if (fDisplay) { | |
| 79 glXMakeCurrent(fDisplay, 0, 0); | |
| 80 | |
| 81 if (fContext) { | |
| 82 glXDestroyContext(fDisplay, fContext); | |
| 83 fContext = NULL; | |
| 84 } | |
| 85 | |
| 86 if (fGlxPixmap) { | |
| 87 glXDestroyGLXPixmap(fDisplay, fGlxPixmap); | |
| 88 fGlxPixmap = 0; | |
| 89 } | |
| 90 | |
| 91 if (fPixmap) { | |
| 92 XFreePixmap(fDisplay, fPixmap); | |
| 93 fPixmap = 0; | |
| 94 } | |
| 95 | |
| 96 XCloseDisplay(fDisplay); | |
| 97 fDisplay = NULL; | |
| 98 } | |
| 99 } | |
| 100 | |
| 101 const GrGLInterface* GLXGLContext::createGLContext(GrGLStandard forcedGpuAPI) { | |
| 102 fDisplay = XOpenDisplay(0); | |
| 103 | |
| 104 if (!fDisplay) { | |
| 105 SkDebugf("Failed to open X display.\n"); | |
| 106 this->destroyGLContext(); | |
| 107 return NULL; | |
| 108 } | |
| 109 | |
| 110 // Get a matching FB config | |
| 111 static int visual_attribs[] = { | |
| 112 GLX_X_RENDERABLE , True, | |
| 113 GLX_DRAWABLE_TYPE , GLX_PIXMAP_BIT, | |
| 114 None | |
| 115 }; | |
| 116 | |
| 117 int glx_major, glx_minor; | |
| 118 | |
| 119 // FBConfigs were added in GLX version 1.3. | |
| 120 if (!glXQueryVersion(fDisplay, &glx_major, &glx_minor) || | |
| 121 ((glx_major == 1) && (glx_minor < 3)) || (glx_major < 1)) { | |
| 122 SkDebugf("GLX version 1.3 or higher required.\n"); | |
| 123 this->destroyGLContext(); | |
| 124 return NULL; | |
| 125 } | |
| 126 | |
| 127 //SkDebugf("Getting matching framebuffer configs.\n"); | |
| 128 int fbcount; | |
| 129 GLXFBConfig *fbc = glXChooseFBConfig(fDisplay, DefaultScreen(fDisplay), | |
| 130 visual_attribs, &fbcount); | |
| 131 if (!fbc) { | |
| 132 SkDebugf("Failed to retrieve a framebuffer config.\n"); | |
| 133 this->destroyGLContext(); | |
| 134 return NULL; | |
| 135 } | |
| 136 //SkDebugf("Found %d matching FB configs.\n", fbcount); | |
| 137 | |
| 138 // Pick the FB config/visual with the most samples per pixel | |
| 139 //SkDebugf("Getting XVisualInfos.\n"); | |
| 140 int best_fbc = -1, best_num_samp = -1; | |
| 141 | |
| 142 int i; | |
| 143 for (i = 0; i < fbcount; ++i) { | |
| 144 XVisualInfo *vi = glXGetVisualFromFBConfig(fDisplay, fbc[i]); | |
| 145 if (vi) { | |
| 146 int samp_buf, samples; | |
| 147 glXGetFBConfigAttrib(fDisplay, fbc[i], GLX_SAMPLE_BUFFERS, &samp_buf
); | |
| 148 glXGetFBConfigAttrib(fDisplay, fbc[i], GLX_SAMPLES, &samples); | |
| 149 | |
| 150 //SkDebugf(" Matching fbconfig %d, visual ID 0x%2x: SAMPLE_BUFFERS
= %d," | |
| 151 // " SAMPLES = %d\n", | |
| 152 // i, (unsigned int)vi->visualid, samp_buf, samples); | |
| 153 | |
| 154 if (best_fbc < 0 || (samp_buf && samples > best_num_samp)) | |
| 155 best_fbc = i, best_num_samp = samples; | |
| 156 } | |
| 157 XFree(vi); | |
| 158 } | |
| 159 | |
| 160 GLXFBConfig bestFbc = fbc[best_fbc]; | |
| 161 | |
| 162 // Be sure to free the FBConfig list allocated by glXChooseFBConfig() | |
| 163 XFree(fbc); | |
| 164 | |
| 165 // Get a visual | |
| 166 XVisualInfo *vi = glXGetVisualFromFBConfig(fDisplay, bestFbc); | |
| 167 //SkDebugf("Chosen visual ID = 0x%x\n", (unsigned int)vi->visualid); | |
| 168 | |
| 169 fPixmap = XCreatePixmap(fDisplay, RootWindow(fDisplay, vi->screen), 10, 10,
vi->depth); | |
| 170 | |
| 171 if (!fPixmap) { | |
| 172 SkDebugf("Failed to create pixmap.\n"); | |
| 173 this->destroyGLContext(); | |
| 174 return NULL; | |
| 175 } | |
| 176 | |
| 177 fGlxPixmap = glXCreateGLXPixmap(fDisplay, vi, fPixmap); | |
| 178 | |
| 179 // Done with the visual info data | |
| 180 XFree(vi); | |
| 181 | |
| 182 // Create the context | |
| 183 | |
| 184 // Install an X error handler so the application won't exit if GL 3.0 | |
| 185 // context allocation fails. | |
| 186 // | |
| 187 // Note this error handler is global. | |
| 188 // All display connections in all threads of a process use the same | |
| 189 // error handler, so be sure to guard against other threads issuing | |
| 190 // X commands while this code is running. | |
| 191 ctxErrorOccurred = false; | |
| 192 int (*oldHandler)(Display*, XErrorEvent*) = | |
| 193 XSetErrorHandler(&ctxErrorHandler); | |
| 194 | |
| 195 // Get the default screen's GLX extension list | |
| 196 const char *glxExts = glXQueryExtensionsString( | |
| 197 fDisplay, DefaultScreen(fDisplay) | |
| 198 ); | |
| 199 | |
| 200 | |
| 201 // Check for the GLX_ARB_create_context extension string and the function. | |
| 202 // If either is not present, use GLX 1.3 context creation method. | |
| 203 if (!gluCheckExtension(reinterpret_cast<const GLubyte*>("GLX_ARB_create_cont
ext"), | |
| 204 reinterpret_cast<const GLubyte*>(glxExts))) { | |
| 205 if (kGLES_GrGLStandard != forcedGpuAPI) { | |
| 206 fContext = glXCreateNewContext(fDisplay, bestFbc, GLX_RGBA_TYPE, 0,
True); | |
| 207 } | |
| 208 } else { | |
| 209 //SkDebugf("Creating context.\n"); | |
| 210 PFNGLXCREATECONTEXTATTRIBSARBPROC glXCreateContextAttribsARB = | |
| 211 (PFNGLXCREATECONTEXTATTRIBSARBPROC) glXGetProcAddressARB((GrGLubyte*
)"glXCreateContextAttribsARB"); | |
| 212 | |
| 213 if (kGLES_GrGLStandard == forcedGpuAPI) { | |
| 214 if (gluCheckExtension( | |
| 215 reinterpret_cast<const GLubyte*>("GLX_EXT_create_context_es2
_profile"), | |
| 216 reinterpret_cast<const GLubyte*>(glxExts))) { | |
| 217 static const int context_attribs_gles[] = { | |
| 218 GLX_CONTEXT_MAJOR_VERSION_ARB, 3, | |
| 219 GLX_CONTEXT_MINOR_VERSION_ARB, 0, | |
| 220 GLX_CONTEXT_PROFILE_MASK_ARB, GLX_CONTEXT_ES2_PROFILE_BIT_EX
T, | |
| 221 None | |
| 222 }; | |
| 223 fContext = glXCreateContextAttribsARB(fDisplay, bestFbc, 0, True
, | |
| 224 context_attribs_gles); | |
| 225 } | |
| 226 } else { | |
| 227 // Well, unfortunately GLX will not just give us the highest context
so instead we have | |
| 228 // to do this nastiness | |
| 229 for (i = NUM_GL_VERSIONS - 2; i > 0 ; i--) { | |
| 230 /* don't bother below GL 3.0 */ | |
| 231 if (gl_versions[i].major == 3 && gl_versions[i].minor == 0) { | |
| 232 break; | |
| 233 } | |
| 234 // On Nvidia GPUs, to use Nv Path rendering we need a compatibil
ity profile for the | |
| 235 // time being. | |
| 236 // TODO when Nvidia implements NVPR on Core profiles, we should
start requesting | |
| 237 // core here | |
| 238 static const int context_attribs_gl[] = { | |
| 239 GLX_CONTEXT_MAJOR_VERSION_ARB, gl_versions[i].major, | |
| 240 GLX_CONTEXT_MINOR_VERSION_ARB, gl_versions[i].minor, | |
| 241 GLX_CONTEXT_PROFILE_MASK_ARB, GLX_CONTEXT_COMPATIBILITY_PR
OFILE_BIT_ARB, | |
| 242 None | |
| 243 }; | |
| 244 fContext = | |
| 245 glXCreateContextAttribsARB(fDisplay, bestFbc, 0, True, c
ontext_attribs_gl); | |
| 246 | |
| 247 // Sync to ensure any errors generated are processed. | |
| 248 XSync(fDisplay, False); | |
| 249 | |
| 250 if (!ctxErrorOccurred && fContext) { | |
| 251 break; | |
| 252 } | |
| 253 // try again | |
| 254 ctxErrorOccurred = false; | |
| 255 } | |
| 256 | |
| 257 // Couldn't create GL 3.0 context. | |
| 258 // Fall back to old-style 2.x context. | |
| 259 // When a context version below 3.0 is requested, | |
| 260 // implementations will return the newest context version | |
| 261 // compatible with OpenGL versions less than version 3.0. | |
| 262 if (ctxErrorOccurred || !fContext) { | |
| 263 static const int context_attribs_gl_fallback[] = { | |
| 264 GLX_CONTEXT_MAJOR_VERSION_ARB, 1, | |
| 265 GLX_CONTEXT_MINOR_VERSION_ARB, 0, | |
| 266 None | |
| 267 }; | |
| 268 | |
| 269 ctxErrorOccurred = false; | |
| 270 | |
| 271 fContext = glXCreateContextAttribsARB(fDisplay, bestFbc, 0, True
, | |
| 272 context_attribs_gl_fallbac
k); | |
| 273 } | |
| 274 } | |
| 275 } | |
| 276 | |
| 277 // Sync to ensure any errors generated are processed. | |
| 278 XSync(fDisplay, False); | |
| 279 | |
| 280 // Restore the original error handler | |
| 281 XSetErrorHandler(oldHandler); | |
| 282 | |
| 283 if (ctxErrorOccurred || !fContext) { | |
| 284 SkDebugf("Failed to create an OpenGL context.\n"); | |
| 285 this->destroyGLContext(); | |
| 286 return NULL; | |
| 287 } | |
| 288 | |
| 289 // Verify that context is a direct context | |
| 290 if (!glXIsDirect(fDisplay, fContext)) { | |
| 291 //SkDebugf("Indirect GLX rendering context obtained.\n"); | |
| 292 } else { | |
| 293 //SkDebugf("Direct GLX rendering context obtained.\n"); | |
| 294 } | |
| 295 | |
| 296 //SkDebugf("Making context current.\n"); | |
| 297 if (!glXMakeCurrent(fDisplay, fGlxPixmap, fContext)) { | |
| 298 SkDebugf("Could not set the context.\n"); | |
| 299 this->destroyGLContext(); | |
| 300 return NULL; | |
| 301 } | |
| 302 | |
| 303 const GrGLInterface* interface = GrGLCreateNativeInterface(); | |
| 304 if (!interface) { | |
| 305 SkDebugf("Failed to create gl interface"); | |
| 306 this->destroyGLContext(); | |
| 307 return NULL; | |
| 308 } | |
| 309 return interface; | |
| 310 } | |
| 311 | |
| 312 void GLXGLContext::makeCurrent() const { | |
| 313 if (!glXMakeCurrent(fDisplay, fGlxPixmap, fContext)) { | |
| 314 SkDebugf("Could not set the context.\n"); | |
| 315 } | |
| 316 } | |
| 317 | |
| 318 void GLXGLContext::swapBuffers() const { | |
| 319 glXSwapBuffers(fDisplay, fGlxPixmap); | |
| 320 } | |
| 321 | |
| 322 } // anonymous namespace | |
| 323 | |
| 324 SkGLContext* SkCreatePlatformGLContext() { | |
| 325 return SkNEW(GLXGLContext); | |
| 326 } | |
| OLD | NEW |
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Chromium Code Reviews
Issue 639793002:
Revert of Make the Sk GL context class an abstract base class (Closed)
Base URL: https://skia.googlesource.com/skia.git@master