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| 1 /* | |
| 2 * Copyright 2011 Google Inc. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license that can be | |
| 5 * found in the LICENSE file. | |
| 6 */ | |
| 7 #include "gl/SkGLContext.h" | |
| 8 | |
| 9 #include <X11/Xlib.h> | |
| 10 #include <GL/glx.h> | |
| 11 #include <GL/glu.h> | |
| 12 | |
| 13 namespace { | |
| 14 | |
| 15 /* Note: Skia requires glx 1.3 or newer */ | |
| 16 | |
| 17 /* This struct is taken from a mesa demo. Please update as required */ | |
| 18 static const struct { int major, minor; } gl_versions[] = { | |
| 19 {1, 0}, | |
| 20 {1, 1}, | |
| 21 {1, 2}, | |
| 22 {1, 3}, | |
| 23 {1, 4}, | |
| 24 {1, 5}, | |
| 25 {2, 0}, | |
| 26 {2, 1}, | |
| 27 {3, 0}, | |
| 28 {3, 1}, | |
| 29 {3, 2}, | |
| 30 {3, 3}, | |
| 31 {4, 0}, | |
| 32 {4, 1}, | |
| 33 {4, 2}, | |
| 34 {4, 3}, | |
| 35 {4, 4}, | |
| 36 {0, 0} /* end of list */ | |
| 37 }; | |
| 38 #define NUM_GL_VERSIONS SK_ARRAY_COUNT(gl_versions) | |
| 39 | |
| 40 static bool ctxErrorOccurred = false; | |
| 41 static int ctxErrorHandler(Display *dpy, XErrorEvent *ev) { | |
| 42 ctxErrorOccurred = true; | |
| 43 return 0; | |
| 44 } | |
| 45 | |
| 46 class GLXGLContext : public SkGLContext { | |
| 47 public: | |
| 48 GLXGLContext(GrGLStandard forcedGpuAPI, GLXGLContext* shareList); | |
| 49 ~GLXGLContext() override; | |
| 50 | |
| 51 private: | |
| 52 void destroyGLContext(); | |
| 53 | |
| 54 void onPlatformMakeCurrent() const override; | |
| 55 void onPlatformSwapBuffers() const override; | |
| 56 GrGLFuncPtr onPlatformGetProcAddress(const char*) const override; | |
| 57 | |
| 58 GLXContext fContext; | |
| 59 Display* fDisplay; | |
| 60 Pixmap fPixmap; | |
| 61 GLXPixmap fGlxPixmap; | |
| 62 }; | |
| 63 | |
| 64 GLXGLContext::GLXGLContext(GrGLStandard forcedGpuAPI, GLXGLContext* shareContext
) | |
| 65 : fContext(nullptr) | |
| 66 , fDisplay(nullptr) | |
| 67 , fPixmap(0) | |
| 68 , fGlxPixmap(0) { | |
| 69 fDisplay = XOpenDisplay(0); | |
| 70 | |
| 71 GLXContext glxShareContext = shareContext ? shareContext->fContext : nullptr
; | |
| 72 | |
| 73 if (!fDisplay) { | |
| 74 SkDebugf("Failed to open X display.\n"); | |
| 75 this->destroyGLContext(); | |
| 76 return; | |
| 77 } | |
| 78 | |
| 79 // Get a matching FB config | |
| 80 static int visual_attribs[] = { | |
| 81 GLX_X_RENDERABLE , True, | |
| 82 GLX_DRAWABLE_TYPE , GLX_PIXMAP_BIT, | |
| 83 None | |
| 84 }; | |
| 85 | |
| 86 int glx_major, glx_minor; | |
| 87 | |
| 88 // FBConfigs were added in GLX version 1.3. | |
| 89 if (!glXQueryVersion(fDisplay, &glx_major, &glx_minor) || | |
| 90 ((glx_major == 1) && (glx_minor < 3)) || (glx_major < 1)) { | |
| 91 SkDebugf("GLX version 1.3 or higher required.\n"); | |
| 92 this->destroyGLContext(); | |
| 93 return; | |
| 94 } | |
| 95 | |
| 96 //SkDebugf("Getting matching framebuffer configs.\n"); | |
| 97 int fbcount; | |
| 98 GLXFBConfig *fbc = glXChooseFBConfig(fDisplay, DefaultScreen(fDisplay), | |
| 99 visual_attribs, &fbcount); | |
| 100 if (!fbc) { | |
| 101 SkDebugf("Failed to retrieve a framebuffer config.\n"); | |
| 102 this->destroyGLContext(); | |
| 103 return; | |
| 104 } | |
| 105 //SkDebugf("Found %d matching FB configs.\n", fbcount); | |
| 106 | |
| 107 // Pick the FB config/visual with the most samples per pixel | |
| 108 //SkDebugf("Getting XVisualInfos.\n"); | |
| 109 int best_fbc = -1, best_num_samp = -1; | |
| 110 | |
| 111 int i; | |
| 112 for (i = 0; i < fbcount; ++i) { | |
| 113 XVisualInfo *vi = glXGetVisualFromFBConfig(fDisplay, fbc[i]); | |
| 114 if (vi) { | |
| 115 int samp_buf, samples; | |
| 116 glXGetFBConfigAttrib(fDisplay, fbc[i], GLX_SAMPLE_BUFFERS, &samp_buf
); | |
| 117 glXGetFBConfigAttrib(fDisplay, fbc[i], GLX_SAMPLES, &samples); | |
| 118 | |
| 119 //SkDebugf(" Matching fbconfig %d, visual ID 0x%2x: SAMPLE_BUFFERS
= %d," | |
| 120 // " SAMPLES = %d\n", | |
| 121 // i, (unsigned int)vi->visualid, samp_buf, samples); | |
| 122 | |
| 123 if (best_fbc < 0 || (samp_buf && samples > best_num_samp)) | |
| 124 best_fbc = i, best_num_samp = samples; | |
| 125 } | |
| 126 XFree(vi); | |
| 127 } | |
| 128 | |
| 129 GLXFBConfig bestFbc = fbc[best_fbc]; | |
| 130 | |
| 131 // Be sure to free the FBConfig list allocated by glXChooseFBConfig() | |
| 132 XFree(fbc); | |
| 133 | |
| 134 // Get a visual | |
| 135 XVisualInfo *vi = glXGetVisualFromFBConfig(fDisplay, bestFbc); | |
| 136 //SkDebugf("Chosen visual ID = 0x%x\n", (unsigned int)vi->visualid); | |
| 137 | |
| 138 fPixmap = XCreatePixmap(fDisplay, RootWindow(fDisplay, vi->screen), 10, 10,
vi->depth); | |
| 139 | |
| 140 if (!fPixmap) { | |
| 141 SkDebugf("Failed to create pixmap.\n"); | |
| 142 this->destroyGLContext(); | |
| 143 return; | |
| 144 } | |
| 145 | |
| 146 fGlxPixmap = glXCreateGLXPixmap(fDisplay, vi, fPixmap); | |
| 147 | |
| 148 // Done with the visual info data | |
| 149 XFree(vi); | |
| 150 | |
| 151 // Create the context | |
| 152 | |
| 153 // Install an X error handler so the application won't exit if GL 3.0 | |
| 154 // context allocation fails. | |
| 155 // | |
| 156 // Note this error handler is global. | |
| 157 // All display connections in all threads of a process use the same | |
| 158 // error handler, so be sure to guard against other threads issuing | |
| 159 // X commands while this code is running. | |
| 160 ctxErrorOccurred = false; | |
| 161 int (*oldHandler)(Display*, XErrorEvent*) = | |
| 162 XSetErrorHandler(&ctxErrorHandler); | |
| 163 | |
| 164 // Get the default screen's GLX extension list | |
| 165 const char *glxExts = glXQueryExtensionsString( | |
| 166 fDisplay, DefaultScreen(fDisplay) | |
| 167 ); | |
| 168 | |
| 169 | |
| 170 // Check for the GLX_ARB_create_context extension string and the function. | |
| 171 // If either is not present, use GLX 1.3 context creation method. | |
| 172 if (!gluCheckExtension(reinterpret_cast<const GLubyte*>("GLX_ARB_create_cont
ext"), | |
| 173 reinterpret_cast<const GLubyte*>(glxExts))) { | |
| 174 if (kGLES_GrGLStandard != forcedGpuAPI) { | |
| 175 fContext = glXCreateNewContext(fDisplay, bestFbc, GLX_RGBA_TYPE, 0,
True); | |
| 176 } | |
| 177 } else { | |
| 178 //SkDebugf("Creating context.\n"); | |
| 179 PFNGLXCREATECONTEXTATTRIBSARBPROC glXCreateContextAttribsARB = | |
| 180 (PFNGLXCREATECONTEXTATTRIBSARBPROC) glXGetProcAddressARB((GrGLubyte*
)"glXCreateContextAttribsARB"); | |
| 181 | |
| 182 if (kGLES_GrGLStandard == forcedGpuAPI) { | |
| 183 if (gluCheckExtension( | |
| 184 reinterpret_cast<const GLubyte*>("GLX_EXT_create_context_es2
_profile"), | |
| 185 reinterpret_cast<const GLubyte*>(glxExts))) { | |
| 186 static const int context_attribs_gles[] = { | |
| 187 GLX_CONTEXT_MAJOR_VERSION_ARB, 3, | |
| 188 GLX_CONTEXT_MINOR_VERSION_ARB, 0, | |
| 189 GLX_CONTEXT_PROFILE_MASK_ARB, GLX_CONTEXT_ES2_PROFILE_BIT_EX
T, | |
| 190 None | |
| 191 }; | |
| 192 fContext = glXCreateContextAttribsARB(fDisplay, bestFbc, glxShar
eContext, True, | |
| 193 context_attribs_gles); | |
| 194 } | |
| 195 } else { | |
| 196 // Well, unfortunately GLX will not just give us the highest context
so instead we have | |
| 197 // to do this nastiness | |
| 198 for (i = NUM_GL_VERSIONS - 2; i > 0 ; i--) { | |
| 199 /* don't bother below GL 3.0 */ | |
| 200 if (gl_versions[i].major == 3 && gl_versions[i].minor == 0) { | |
| 201 break; | |
| 202 } | |
| 203 // On Nvidia GPUs, to use Nv Path rendering we need a compatibil
ity profile for the | |
| 204 // time being. | |
| 205 // TODO when Nvidia implements NVPR on Core profiles, we should
start requesting | |
| 206 // core here | |
| 207 static const int context_attribs_gl[] = { | |
| 208 GLX_CONTEXT_MAJOR_VERSION_ARB, gl_versions[i].major, | |
| 209 GLX_CONTEXT_MINOR_VERSION_ARB, gl_versions[i].minor, | |
| 210 GLX_CONTEXT_PROFILE_MASK_ARB, GLX_CONTEXT_COMPATIBILITY_PR
OFILE_BIT_ARB, | |
| 211 None | |
| 212 }; | |
| 213 fContext = | |
| 214 glXCreateContextAttribsARB(fDisplay, bestFbc, glxShareCo
ntext, True, | |
| 215 context_attribs_gl); | |
| 216 | |
| 217 // Sync to ensure any errors generated are processed. | |
| 218 XSync(fDisplay, False); | |
| 219 | |
| 220 if (!ctxErrorOccurred && fContext) { | |
| 221 break; | |
| 222 } | |
| 223 // try again | |
| 224 ctxErrorOccurred = false; | |
| 225 } | |
| 226 | |
| 227 // Couldn't create GL 3.0 context. | |
| 228 // Fall back to old-style 2.x context. | |
| 229 // When a context version below 3.0 is requested, | |
| 230 // implementations will return the newest context version | |
| 231 // compatible with OpenGL versions less than version 3.0. | |
| 232 if (ctxErrorOccurred || !fContext) { | |
| 233 static const int context_attribs_gl_fallback[] = { | |
| 234 GLX_CONTEXT_MAJOR_VERSION_ARB, 1, | |
| 235 GLX_CONTEXT_MINOR_VERSION_ARB, 0, | |
| 236 None | |
| 237 }; | |
| 238 | |
| 239 ctxErrorOccurred = false; | |
| 240 | |
| 241 fContext = glXCreateContextAttribsARB(fDisplay, bestFbc, glxShar
eContext, True, | |
| 242 context_attribs_gl_fallbac
k); | |
| 243 } | |
| 244 } | |
| 245 } | |
| 246 | |
| 247 // Sync to ensure any errors generated are processed. | |
| 248 XSync(fDisplay, False); | |
| 249 | |
| 250 // Restore the original error handler | |
| 251 XSetErrorHandler(oldHandler); | |
| 252 | |
| 253 if (ctxErrorOccurred || !fContext) { | |
| 254 SkDebugf("Failed to create an OpenGL context.\n"); | |
| 255 this->destroyGLContext(); | |
| 256 return; | |
| 257 } | |
| 258 | |
| 259 // Verify that context is a direct context | |
| 260 if (!glXIsDirect(fDisplay, fContext)) { | |
| 261 //SkDebugf("Indirect GLX rendering context obtained.\n"); | |
| 262 } else { | |
| 263 //SkDebugf("Direct GLX rendering context obtained.\n"); | |
| 264 } | |
| 265 | |
| 266 //SkDebugf("Making context current.\n"); | |
| 267 if (!glXMakeCurrent(fDisplay, fGlxPixmap, fContext)) { | |
| 268 SkDebugf("Could not set the context.\n"); | |
| 269 this->destroyGLContext(); | |
| 270 return; | |
| 271 } | |
| 272 | |
| 273 SkAutoTUnref<const GrGLInterface> gl(GrGLCreateNativeInterface()); | |
| 274 if (nullptr == gl.get()) { | |
| 275 SkDebugf("Failed to create gl interface"); | |
| 276 this->destroyGLContext(); | |
| 277 return; | |
| 278 } | |
| 279 | |
| 280 if (!gl->validate()) { | |
| 281 SkDebugf("Failed to validate gl interface"); | |
| 282 this->destroyGLContext(); | |
| 283 return; | |
| 284 } | |
| 285 | |
| 286 this->init(gl.release()); | |
| 287 } | |
| 288 | |
| 289 | |
| 290 GLXGLContext::~GLXGLContext() { | |
| 291 this->teardown(); | |
| 292 this->destroyGLContext(); | |
| 293 } | |
| 294 | |
| 295 void GLXGLContext::destroyGLContext() { | |
| 296 if (fDisplay) { | |
| 297 glXMakeCurrent(fDisplay, 0, 0); | |
| 298 | |
| 299 if (fContext) { | |
| 300 glXDestroyContext(fDisplay, fContext); | |
| 301 fContext = nullptr; | |
| 302 } | |
| 303 | |
| 304 if (fGlxPixmap) { | |
| 305 glXDestroyGLXPixmap(fDisplay, fGlxPixmap); | |
| 306 fGlxPixmap = 0; | |
| 307 } | |
| 308 | |
| 309 if (fPixmap) { | |
| 310 XFreePixmap(fDisplay, fPixmap); | |
| 311 fPixmap = 0; | |
| 312 } | |
| 313 | |
| 314 XCloseDisplay(fDisplay); | |
| 315 fDisplay = nullptr; | |
| 316 } | |
| 317 } | |
| 318 | |
| 319 void GLXGLContext::onPlatformMakeCurrent() const { | |
| 320 if (!glXMakeCurrent(fDisplay, fGlxPixmap, fContext)) { | |
| 321 SkDebugf("Could not set the context.\n"); | |
| 322 } | |
| 323 } | |
| 324 | |
| 325 void GLXGLContext::onPlatformSwapBuffers() const { | |
| 326 glXSwapBuffers(fDisplay, fGlxPixmap); | |
| 327 } | |
| 328 | |
| 329 GrGLFuncPtr GLXGLContext::onPlatformGetProcAddress(const char* procName) const { | |
| 330 return glXGetProcAddress(reinterpret_cast<const GLubyte*>(procName)); | |
| 331 } | |
| 332 | |
| 333 } // anonymous namespace | |
| 334 | |
| 335 SkGLContext* SkCreatePlatformGLContext(GrGLStandard forcedGpuAPI, SkGLContext* s
hareContext) { | |
| 336 GLXGLContext* glxShareContext = reinterpret_cast<GLXGLContext*>(shareContext
); | |
| 337 GLXGLContext *ctx = new GLXGLContext(forcedGpuAPI, glxShareContext); | |
| 338 if (!ctx->isValid()) { | |
| 339 delete ctx; | |
| 340 return nullptr; | |
| 341 } | |
| 342 return ctx; | |
| 343 } | |
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Chromium Code Reviews
Issue 1815823002:
Move SkGLContext and some GrGLInterface implementations to skgputest module (Closed)
Base URL: https://chromium.googlesource.com/skia.git@debugobject