bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 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 | */ |
bsalomon | 1080596 | 2014-10-08 04:45:09 -0700 | [diff] [blame^] | 8 | #include "gl/SkNativeGLContext.h" |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 9 | |
| 10 | #include <GL/glu.h> |
| 11 | |
joshualitt | c863ab0 | 2014-08-07 13:48:49 -0700 | [diff] [blame] | 12 | /* Note: Skia requires glx 1.3 or newer */ |
robertphillips@google.com | bb89cda | 2012-03-14 18:06:26 +0000 | [diff] [blame] | 13 | |
bsalomon | 1080596 | 2014-10-08 04:45:09 -0700 | [diff] [blame^] | 14 | SkNativeGLContext::AutoContextRestore::AutoContextRestore() { |
| 15 | fOldGLXContext = glXGetCurrentContext(); |
| 16 | fOldDisplay = glXGetCurrentDisplay(); |
| 17 | fOldDrawable = glXGetCurrentDrawable(); |
| 18 | } |
| 19 | |
| 20 | SkNativeGLContext::AutoContextRestore::~AutoContextRestore() { |
| 21 | if (fOldDisplay) { |
| 22 | glXMakeCurrent(fOldDisplay, fOldDrawable, fOldGLXContext); |
| 23 | } |
| 24 | } |
| 25 | |
| 26 | /////////////////////////////////////////////////////////////////////////////// |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 27 | |
| 28 | static bool ctxErrorOccurred = false; |
| 29 | static int ctxErrorHandler(Display *dpy, XErrorEvent *ev) { |
| 30 | ctxErrorOccurred = true; |
| 31 | return 0; |
| 32 | } |
| 33 | |
bsalomon | 1080596 | 2014-10-08 04:45:09 -0700 | [diff] [blame^] | 34 | SkNativeGLContext::SkNativeGLContext() |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 35 | : fContext(NULL) |
| 36 | , fDisplay(NULL) |
| 37 | , fPixmap(0) |
| 38 | , fGlxPixmap(0) { |
| 39 | } |
| 40 | |
bsalomon | 1080596 | 2014-10-08 04:45:09 -0700 | [diff] [blame^] | 41 | SkNativeGLContext::~SkNativeGLContext() { |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 42 | this->destroyGLContext(); |
| 43 | } |
| 44 | |
bsalomon | 1080596 | 2014-10-08 04:45:09 -0700 | [diff] [blame^] | 45 | void SkNativeGLContext::destroyGLContext() { |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 46 | if (fDisplay) { |
| 47 | glXMakeCurrent(fDisplay, 0, 0); |
| 48 | |
| 49 | if (fContext) { |
| 50 | glXDestroyContext(fDisplay, fContext); |
| 51 | fContext = NULL; |
| 52 | } |
| 53 | |
| 54 | if (fGlxPixmap) { |
| 55 | glXDestroyGLXPixmap(fDisplay, fGlxPixmap); |
| 56 | fGlxPixmap = 0; |
| 57 | } |
| 58 | |
| 59 | if (fPixmap) { |
| 60 | XFreePixmap(fDisplay, fPixmap); |
| 61 | fPixmap = 0; |
| 62 | } |
| 63 | |
| 64 | XCloseDisplay(fDisplay); |
| 65 | fDisplay = NULL; |
| 66 | } |
| 67 | } |
| 68 | |
bsalomon | 1080596 | 2014-10-08 04:45:09 -0700 | [diff] [blame^] | 69 | const GrGLInterface* SkNativeGLContext::createGLContext(GrGLStandard forcedGpuAPI) { |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 70 | fDisplay = XOpenDisplay(0); |
| 71 | |
| 72 | if (!fDisplay) { |
| 73 | SkDebugf("Failed to open X display.\n"); |
| 74 | this->destroyGLContext(); |
| 75 | return NULL; |
| 76 | } |
| 77 | |
| 78 | // Get a matching FB config |
| 79 | static int visual_attribs[] = { |
| 80 | GLX_X_RENDERABLE , True, |
| 81 | GLX_DRAWABLE_TYPE , GLX_PIXMAP_BIT, |
| 82 | None |
| 83 | }; |
| 84 | |
joshualitt | c863ab0 | 2014-08-07 13:48:49 -0700 | [diff] [blame] | 85 | int glx_major, glx_minor; |
| 86 | |
| 87 | // FBConfigs were added in GLX version 1.3. |
| 88 | if (!glXQueryVersion(fDisplay, &glx_major, &glx_minor) || |
| 89 | ((glx_major == 1) && (glx_minor < 3)) || (glx_major < 1)) { |
| 90 | SkDebugf("GLX version 1.3 or higher required.\n"); |
| 91 | this->destroyGLContext(); |
| 92 | return NULL; |
| 93 | } |
| 94 | |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 95 | //SkDebugf("Getting matching framebuffer configs.\n"); |
| 96 | int fbcount; |
| 97 | GLXFBConfig *fbc = glXChooseFBConfig(fDisplay, DefaultScreen(fDisplay), |
| 98 | visual_attribs, &fbcount); |
| 99 | if (!fbc) { |
| 100 | SkDebugf("Failed to retrieve a framebuffer config.\n"); |
| 101 | this->destroyGLContext(); |
| 102 | return NULL; |
| 103 | } |
| 104 | //SkDebugf("Found %d matching FB configs.\n", fbcount); |
| 105 | |
| 106 | // Pick the FB config/visual with the most samples per pixel |
| 107 | //SkDebugf("Getting XVisualInfos.\n"); |
robertphillips@google.com | bb89cda | 2012-03-14 18:06:26 +0000 | [diff] [blame] | 108 | int best_fbc = -1, best_num_samp = -1; |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 109 | |
| 110 | int i; |
| 111 | for (i = 0; i < fbcount; ++i) { |
| 112 | XVisualInfo *vi = glXGetVisualFromFBConfig(fDisplay, fbc[i]); |
| 113 | if (vi) { |
| 114 | int samp_buf, samples; |
| 115 | glXGetFBConfigAttrib(fDisplay, fbc[i], GLX_SAMPLE_BUFFERS, &samp_buf); |
| 116 | glXGetFBConfigAttrib(fDisplay, fbc[i], GLX_SAMPLES, &samples); |
| 117 | |
| 118 | //SkDebugf(" Matching fbconfig %d, visual ID 0x%2x: SAMPLE_BUFFERS = %d," |
| 119 | // " SAMPLES = %d\n", |
| 120 | // i, (unsigned int)vi->visualid, samp_buf, samples); |
| 121 | |
| 122 | if (best_fbc < 0 || (samp_buf && samples > best_num_samp)) |
| 123 | best_fbc = i, best_num_samp = samples; |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 124 | } |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 125 | XFree(vi); |
| 126 | } |
| 127 | |
| 128 | GLXFBConfig bestFbc = fbc[best_fbc]; |
| 129 | |
| 130 | // Be sure to free the FBConfig list allocated by glXChooseFBConfig() |
| 131 | XFree(fbc); |
| 132 | |
| 133 | // Get a visual |
| 134 | XVisualInfo *vi = glXGetVisualFromFBConfig(fDisplay, bestFbc); |
| 135 | //SkDebugf("Chosen visual ID = 0x%x\n", (unsigned int)vi->visualid); |
| 136 | |
| 137 | fPixmap = XCreatePixmap(fDisplay, RootWindow(fDisplay, vi->screen), 10, 10, vi->depth); |
| 138 | |
| 139 | if (!fPixmap) { |
| 140 | SkDebugf("Failed to create pixmap.\n"); |
| 141 | this->destroyGLContext(); |
| 142 | return NULL; |
| 143 | } |
| 144 | |
| 145 | fGlxPixmap = glXCreateGLXPixmap(fDisplay, vi, fPixmap); |
| 146 | |
| 147 | // Done with the visual info data |
| 148 | XFree(vi); |
| 149 | |
| 150 | // Create the context |
| 151 | |
| 152 | // Install an X error handler so the application won't exit if GL 3.0 |
| 153 | // context allocation fails. |
| 154 | // |
| 155 | // Note this error handler is global. |
| 156 | // All display connections in all threads of a process use the same |
| 157 | // error handler, so be sure to guard against other threads issuing |
| 158 | // X commands while this code is running. |
| 159 | ctxErrorOccurred = false; |
| 160 | int (*oldHandler)(Display*, XErrorEvent*) = |
| 161 | XSetErrorHandler(&ctxErrorHandler); |
| 162 | |
| 163 | // Get the default screen's GLX extension list |
| 164 | const char *glxExts = glXQueryExtensionsString( |
| 165 | fDisplay, DefaultScreen(fDisplay) |
| 166 | ); |
kkinnunen | 80549fc | 2014-06-30 06:36:31 -0700 | [diff] [blame] | 167 | |
| 168 | |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 169 | // Check for the GLX_ARB_create_context extension string and the function. |
| 170 | // If either is not present, use GLX 1.3 context creation method. |
kkinnunen | 80549fc | 2014-06-30 06:36:31 -0700 | [diff] [blame] | 171 | if (!gluCheckExtension(reinterpret_cast<const GLubyte*>("GLX_ARB_create_context"), |
| 172 | reinterpret_cast<const GLubyte*>(glxExts))) { |
| 173 | if (kGLES_GrGLStandard != forcedGpuAPI) { |
kkinnunen | 80549fc | 2014-06-30 06:36:31 -0700 | [diff] [blame] | 174 | fContext = glXCreateNewContext(fDisplay, bestFbc, GLX_RGBA_TYPE, 0, True); |
kkinnunen | 80549fc | 2014-06-30 06:36:31 -0700 | [diff] [blame] | 175 | } |
joshualitt | c863ab0 | 2014-08-07 13:48:49 -0700 | [diff] [blame] | 176 | } else { |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 177 | //SkDebugf("Creating context.\n"); |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 178 | PFNGLXCREATECONTEXTATTRIBSARBPROC glXCreateContextAttribsARB = |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 179 | (PFNGLXCREATECONTEXTATTRIBSARBPROC) glXGetProcAddressARB((GrGLubyte*)"glXCreateContextAttribsARB"); |
kkinnunen | 80549fc | 2014-06-30 06:36:31 -0700 | [diff] [blame] | 180 | |
kkinnunen | 80549fc | 2014-06-30 06:36:31 -0700 | [diff] [blame] | 181 | if (kGLES_GrGLStandard == forcedGpuAPI) { |
| 182 | if (gluCheckExtension( |
| 183 | reinterpret_cast<const GLubyte*>("GLX_EXT_create_context_es2_profile"), |
| 184 | reinterpret_cast<const GLubyte*>(glxExts))) { |
joshualitt | c863ab0 | 2014-08-07 13:48:49 -0700 | [diff] [blame] | 185 | static const int context_attribs_gles[] = { |
| 186 | GLX_CONTEXT_MAJOR_VERSION_ARB, 3, |
| 187 | GLX_CONTEXT_MINOR_VERSION_ARB, 0, |
| 188 | GLX_CONTEXT_PROFILE_MASK_ARB, GLX_CONTEXT_ES2_PROFILE_BIT_EXT, |
| 189 | None |
| 190 | }; |
kkinnunen | 80549fc | 2014-06-30 06:36:31 -0700 | [diff] [blame] | 191 | fContext = glXCreateContextAttribsARB(fDisplay, bestFbc, 0, True, |
| 192 | context_attribs_gles); |
| 193 | } |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 194 | } else { |
joshualitt | c863ab0 | 2014-08-07 13:48:49 -0700 | [diff] [blame] | 195 | // Well, unfortunately GLX will not just give us the highest context so instead we have |
| 196 | // to do this nastiness |
| 197 | for (i = NUM_GL_VERSIONS - 2; i > 0 ; i--) { |
| 198 | /* don't bother below GL 3.0 */ |
| 199 | if (gl_versions[i].major == 3 && gl_versions[i].minor == 0) { |
| 200 | break; |
| 201 | } |
| 202 | // On Nvidia GPUs, to use Nv Path rendering we need a compatibility profile for the |
| 203 | // time being. |
| 204 | // TODO when Nvidia implements NVPR on Core profiles, we should start requesting |
| 205 | // core here |
| 206 | static const int context_attribs_gl[] = { |
| 207 | GLX_CONTEXT_MAJOR_VERSION_ARB, gl_versions[i].major, |
| 208 | GLX_CONTEXT_MINOR_VERSION_ARB, gl_versions[i].minor, |
| 209 | GLX_CONTEXT_PROFILE_MASK_ARB, GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, |
| 210 | None |
| 211 | }; |
| 212 | fContext = |
| 213 | glXCreateContextAttribsARB(fDisplay, bestFbc, 0, True, context_attribs_gl); |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 214 | |
joshualitt | c863ab0 | 2014-08-07 13:48:49 -0700 | [diff] [blame] | 215 | // Sync to ensure any errors generated are processed. |
| 216 | XSync(fDisplay, False); |
| 217 | |
| 218 | if (!ctxErrorOccurred && fContext) { |
| 219 | break; |
| 220 | } |
| 221 | // try again |
| 222 | ctxErrorOccurred = false; |
| 223 | } |
| 224 | |
| 225 | // Couldn't create GL 3.0 context. |
| 226 | // Fall back to old-style 2.x context. |
| 227 | // When a context version below 3.0 is requested, |
| 228 | // implementations will return the newest context version |
| 229 | // compatible with OpenGL versions less than version 3.0. |
kkinnunen | 80549fc | 2014-06-30 06:36:31 -0700 | [diff] [blame] | 230 | if (ctxErrorOccurred || !fContext) { |
joshualitt | c863ab0 | 2014-08-07 13:48:49 -0700 | [diff] [blame] | 231 | static const int context_attribs_gl_fallback[] = { |
| 232 | GLX_CONTEXT_MAJOR_VERSION_ARB, 1, |
| 233 | GLX_CONTEXT_MINOR_VERSION_ARB, 0, |
| 234 | None |
| 235 | }; |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 236 | |
kkinnunen | 80549fc | 2014-06-30 06:36:31 -0700 | [diff] [blame] | 237 | ctxErrorOccurred = false; |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 238 | |
kkinnunen | 80549fc | 2014-06-30 06:36:31 -0700 | [diff] [blame] | 239 | fContext = glXCreateContextAttribsARB(fDisplay, bestFbc, 0, True, |
| 240 | context_attribs_gl_fallback); |
| 241 | } |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 242 | } |
| 243 | } |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 244 | |
| 245 | // Sync to ensure any errors generated are processed. |
| 246 | XSync(fDisplay, False); |
| 247 | |
| 248 | // Restore the original error handler |
| 249 | XSetErrorHandler(oldHandler); |
| 250 | |
| 251 | if (ctxErrorOccurred || !fContext) { |
| 252 | SkDebugf("Failed to create an OpenGL context.\n"); |
| 253 | this->destroyGLContext(); |
| 254 | return NULL; |
| 255 | } |
| 256 | |
| 257 | // Verify that context is a direct context |
| 258 | if (!glXIsDirect(fDisplay, fContext)) { |
| 259 | //SkDebugf("Indirect GLX rendering context obtained.\n"); |
| 260 | } else { |
| 261 | //SkDebugf("Direct GLX rendering context obtained.\n"); |
| 262 | } |
| 263 | |
| 264 | //SkDebugf("Making context current.\n"); |
| 265 | if (!glXMakeCurrent(fDisplay, fGlxPixmap, fContext)) { |
| 266 | SkDebugf("Could not set the context.\n"); |
| 267 | this->destroyGLContext(); |
| 268 | return NULL; |
| 269 | } |
| 270 | |
| 271 | const GrGLInterface* interface = GrGLCreateNativeInterface(); |
| 272 | if (!interface) { |
| 273 | SkDebugf("Failed to create gl interface"); |
| 274 | this->destroyGLContext(); |
| 275 | return NULL; |
| 276 | } |
| 277 | return interface; |
| 278 | } |
| 279 | |
bsalomon | 1080596 | 2014-10-08 04:45:09 -0700 | [diff] [blame^] | 280 | void SkNativeGLContext::makeCurrent() const { |
bsalomon@google.com | 373a663 | 2011-10-19 20:43:20 +0000 | [diff] [blame] | 281 | if (!glXMakeCurrent(fDisplay, fGlxPixmap, fContext)) { |
| 282 | SkDebugf("Could not set the context.\n"); |
| 283 | } |
| 284 | } |
djsollen@google.com | c9542ca | 2013-10-09 18:25:38 +0000 | [diff] [blame] | 285 | |
bsalomon | 1080596 | 2014-10-08 04:45:09 -0700 | [diff] [blame^] | 286 | void SkNativeGLContext::swapBuffers() const { |
djsollen@google.com | c9542ca | 2013-10-09 18:25:38 +0000 | [diff] [blame] | 287 | glXSwapBuffers(fDisplay, fGlxPixmap); |
| 288 | } |