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Unified Diff: src/gpu/gl/glx/SkNativeGLContext_glx.cpp

Issue 630843002: Make the Sk GL context class an abstract base class (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: fix android link problem and ios compile problem Created 6 years, 2 months ago
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Index: src/gpu/gl/glx/SkNativeGLContext_glx.cpp
diff --git a/src/gpu/gl/glx/SkNativeGLContext_glx.cpp b/src/gpu/gl/glx/SkNativeGLContext_glx.cpp
deleted file mode 100644
index bd130b545cd9af62de9002dfbc6aef2f0e4b85da..0000000000000000000000000000000000000000
--- a/src/gpu/gl/glx/SkNativeGLContext_glx.cpp
+++ /dev/null
@@ -1,288 +0,0 @@
-
-/*
- * Copyright 2011 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-#include "gl/SkNativeGLContext.h"
-
-#include <GL/glu.h>
-
-/* Note: Skia requires glx 1.3 or newer */
-
-SkNativeGLContext::AutoContextRestore::AutoContextRestore() {
- fOldGLXContext = glXGetCurrentContext();
- fOldDisplay = glXGetCurrentDisplay();
- fOldDrawable = glXGetCurrentDrawable();
-}
-
-SkNativeGLContext::AutoContextRestore::~AutoContextRestore() {
- if (fOldDisplay) {
- glXMakeCurrent(fOldDisplay, fOldDrawable, fOldGLXContext);
- }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-static bool ctxErrorOccurred = false;
-static int ctxErrorHandler(Display *dpy, XErrorEvent *ev) {
- ctxErrorOccurred = true;
- return 0;
-}
-
-SkNativeGLContext::SkNativeGLContext()
- : fContext(NULL)
- , fDisplay(NULL)
- , fPixmap(0)
- , fGlxPixmap(0) {
-}
-
-SkNativeGLContext::~SkNativeGLContext() {
- this->destroyGLContext();
-}
-
-void SkNativeGLContext::destroyGLContext() {
- if (fDisplay) {
- glXMakeCurrent(fDisplay, 0, 0);
-
- if (fContext) {
- glXDestroyContext(fDisplay, fContext);
- fContext = NULL;
- }
-
- if (fGlxPixmap) {
- glXDestroyGLXPixmap(fDisplay, fGlxPixmap);
- fGlxPixmap = 0;
- }
-
- if (fPixmap) {
- XFreePixmap(fDisplay, fPixmap);
- fPixmap = 0;
- }
-
- XCloseDisplay(fDisplay);
- fDisplay = NULL;
- }
-}
-
-const GrGLInterface* SkNativeGLContext::createGLContext(GrGLStandard forcedGpuAPI) {
- fDisplay = XOpenDisplay(0);
-
- if (!fDisplay) {
- SkDebugf("Failed to open X display.\n");
- this->destroyGLContext();
- return NULL;
- }
-
- // Get a matching FB config
- static int visual_attribs[] = {
- GLX_X_RENDERABLE , True,
- GLX_DRAWABLE_TYPE , GLX_PIXMAP_BIT,
- None
- };
-
- int glx_major, glx_minor;
-
- // FBConfigs were added in GLX version 1.3.
- if (!glXQueryVersion(fDisplay, &glx_major, &glx_minor) ||
- ((glx_major == 1) && (glx_minor < 3)) || (glx_major < 1)) {
- SkDebugf("GLX version 1.3 or higher required.\n");
- this->destroyGLContext();
- return NULL;
- }
-
- //SkDebugf("Getting matching framebuffer configs.\n");
- int fbcount;
- GLXFBConfig *fbc = glXChooseFBConfig(fDisplay, DefaultScreen(fDisplay),
- visual_attribs, &fbcount);
- if (!fbc) {
- SkDebugf("Failed to retrieve a framebuffer config.\n");
- this->destroyGLContext();
- return NULL;
- }
- //SkDebugf("Found %d matching FB configs.\n", fbcount);
-
- // Pick the FB config/visual with the most samples per pixel
- //SkDebugf("Getting XVisualInfos.\n");
- int best_fbc = -1, best_num_samp = -1;
-
- int i;
- for (i = 0; i < fbcount; ++i) {
- XVisualInfo *vi = glXGetVisualFromFBConfig(fDisplay, fbc[i]);
- if (vi) {
- int samp_buf, samples;
- glXGetFBConfigAttrib(fDisplay, fbc[i], GLX_SAMPLE_BUFFERS, &samp_buf);
- glXGetFBConfigAttrib(fDisplay, fbc[i], GLX_SAMPLES, &samples);
-
- //SkDebugf(" Matching fbconfig %d, visual ID 0x%2x: SAMPLE_BUFFERS = %d,"
- // " SAMPLES = %d\n",
- // i, (unsigned int)vi->visualid, samp_buf, samples);
-
- if (best_fbc < 0 || (samp_buf && samples > best_num_samp))
- best_fbc = i, best_num_samp = samples;
- }
- XFree(vi);
- }
-
- GLXFBConfig bestFbc = fbc[best_fbc];
-
- // Be sure to free the FBConfig list allocated by glXChooseFBConfig()
- XFree(fbc);
-
- // Get a visual
- XVisualInfo *vi = glXGetVisualFromFBConfig(fDisplay, bestFbc);
- //SkDebugf("Chosen visual ID = 0x%x\n", (unsigned int)vi->visualid);
-
- fPixmap = XCreatePixmap(fDisplay, RootWindow(fDisplay, vi->screen), 10, 10, vi->depth);
-
- if (!fPixmap) {
- SkDebugf("Failed to create pixmap.\n");
- this->destroyGLContext();
- return NULL;
- }
-
- fGlxPixmap = glXCreateGLXPixmap(fDisplay, vi, fPixmap);
-
- // Done with the visual info data
- XFree(vi);
-
- // Create the context
-
- // Install an X error handler so the application won't exit if GL 3.0
- // context allocation fails.
- //
- // Note this error handler is global.
- // All display connections in all threads of a process use the same
- // error handler, so be sure to guard against other threads issuing
- // X commands while this code is running.
- ctxErrorOccurred = false;
- int (*oldHandler)(Display*, XErrorEvent*) =
- XSetErrorHandler(&ctxErrorHandler);
-
- // Get the default screen's GLX extension list
- const char *glxExts = glXQueryExtensionsString(
- fDisplay, DefaultScreen(fDisplay)
- );
-
-
- // Check for the GLX_ARB_create_context extension string and the function.
- // If either is not present, use GLX 1.3 context creation method.
- if (!gluCheckExtension(reinterpret_cast<const GLubyte*>("GLX_ARB_create_context"),
- reinterpret_cast<const GLubyte*>(glxExts))) {
- if (kGLES_GrGLStandard != forcedGpuAPI) {
- fContext = glXCreateNewContext(fDisplay, bestFbc, GLX_RGBA_TYPE, 0, True);
- }
- } else {
- //SkDebugf("Creating context.\n");
- PFNGLXCREATECONTEXTATTRIBSARBPROC glXCreateContextAttribsARB =
- (PFNGLXCREATECONTEXTATTRIBSARBPROC) glXGetProcAddressARB((GrGLubyte*)"glXCreateContextAttribsARB");
-
- if (kGLES_GrGLStandard == forcedGpuAPI) {
- if (gluCheckExtension(
- reinterpret_cast<const GLubyte*>("GLX_EXT_create_context_es2_profile"),
- reinterpret_cast<const GLubyte*>(glxExts))) {
- static const int context_attribs_gles[] = {
- GLX_CONTEXT_MAJOR_VERSION_ARB, 3,
- GLX_CONTEXT_MINOR_VERSION_ARB, 0,
- GLX_CONTEXT_PROFILE_MASK_ARB, GLX_CONTEXT_ES2_PROFILE_BIT_EXT,
- None
- };
- fContext = glXCreateContextAttribsARB(fDisplay, bestFbc, 0, True,
- context_attribs_gles);
- }
- } else {
- // Well, unfortunately GLX will not just give us the highest context so instead we have
- // to do this nastiness
- for (i = NUM_GL_VERSIONS - 2; i > 0 ; i--) {
- /* don't bother below GL 3.0 */
- if (gl_versions[i].major == 3 && gl_versions[i].minor == 0) {
- break;
- }
- // On Nvidia GPUs, to use Nv Path rendering we need a compatibility profile for the
- // time being.
- // TODO when Nvidia implements NVPR on Core profiles, we should start requesting
- // core here
- static const int context_attribs_gl[] = {
- GLX_CONTEXT_MAJOR_VERSION_ARB, gl_versions[i].major,
- GLX_CONTEXT_MINOR_VERSION_ARB, gl_versions[i].minor,
- GLX_CONTEXT_PROFILE_MASK_ARB, GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB,
- None
- };
- fContext =
- glXCreateContextAttribsARB(fDisplay, bestFbc, 0, True, context_attribs_gl);
-
- // Sync to ensure any errors generated are processed.
- XSync(fDisplay, False);
-
- if (!ctxErrorOccurred && fContext) {
- break;
- }
- // try again
- ctxErrorOccurred = false;
- }
-
- // Couldn't create GL 3.0 context.
- // Fall back to old-style 2.x context.
- // When a context version below 3.0 is requested,
- // implementations will return the newest context version
- // compatible with OpenGL versions less than version 3.0.
- if (ctxErrorOccurred || !fContext) {
- static const int context_attribs_gl_fallback[] = {
- GLX_CONTEXT_MAJOR_VERSION_ARB, 1,
- GLX_CONTEXT_MINOR_VERSION_ARB, 0,
- None
- };
-
- ctxErrorOccurred = false;
-
- fContext = glXCreateContextAttribsARB(fDisplay, bestFbc, 0, True,
- context_attribs_gl_fallback);
- }
- }
- }
-
- // Sync to ensure any errors generated are processed.
- XSync(fDisplay, False);
-
- // Restore the original error handler
- XSetErrorHandler(oldHandler);
-
- if (ctxErrorOccurred || !fContext) {
- SkDebugf("Failed to create an OpenGL context.\n");
- this->destroyGLContext();
- return NULL;
- }
-
- // Verify that context is a direct context
- if (!glXIsDirect(fDisplay, fContext)) {
- //SkDebugf("Indirect GLX rendering context obtained.\n");
- } else {
- //SkDebugf("Direct GLX rendering context obtained.\n");
- }
-
- //SkDebugf("Making context current.\n");
- if (!glXMakeCurrent(fDisplay, fGlxPixmap, fContext)) {
- SkDebugf("Could not set the context.\n");
- this->destroyGLContext();
- return NULL;
- }
-
- const GrGLInterface* interface = GrGLCreateNativeInterface();
- if (!interface) {
- SkDebugf("Failed to create gl interface");
- this->destroyGLContext();
- return NULL;
- }
- return interface;
-}
-
-void SkNativeGLContext::makeCurrent() const {
- if (!glXMakeCurrent(fDisplay, fGlxPixmap, fContext)) {
- SkDebugf("Could not set the context.\n");
- }
-}
-
-void SkNativeGLContext::swapBuffers() const {
- glXSwapBuffers(fDisplay, fGlxPixmap);
-}
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