Split EGLContext in GLContextEGL and GLSurfaceEGL.

ui/gfx/gl/gl_surface_egl.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "ui/gfx/gl/gl_surface_egl.h"
 
 #include "build/build_config.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "third_party/angle/include/EGL/egl.h"
-#include "ui/gfx/gl/gl_context_egl.h"
+#include "ui/gfx/gl/egl_util.h"
 
 // This header must come after the above third-party include, as
 // it brings in #defines that cause conflicts.
 #include "ui/gfx/gl/gl_bindings.h"
 
 #if defined(OS_LINUX)
 extern "C" {
 #include <X11/Xlib.h>
 }
-#define EGL_HAS_PBUFFERS 1
 #endif
 
 namespace gfx {
 
 namespace {
-
-// The EGL configuration to use.
+EGLConfig g_config;
 EGLDisplay g_display;
-EGLConfig g_config;
-
-// Returns the last EGL error as a string.
-const char* GetLastEGLErrorString() {
-  EGLint error = eglGetError();
-  switch (error) {
-    case EGL_SUCCESS:
-      return "EGL_SUCCESS";
-    case EGL_BAD_ACCESS:
-      return "EGL_BAD_ACCESS";
-    case EGL_BAD_ALLOC:
-      return "EGL_BAD_ALLOC";
-    case EGL_BAD_ATTRIBUTE:
-      return "EGL_BAD_ATTRIBUTE";
-    case EGL_BAD_CONTEXT:
-      return "EGL_BAD_CONTEXT";
-    case EGL_BAD_CONFIG:
-      return "EGL_BAD_CONFIG";
-    case EGL_BAD_CURRENT_SURFACE:
-      return "EGL_BAD_CURRENT_SURFACE";
-    case EGL_BAD_DISPLAY:
-      return "EGL_BAD_DISPLAY";
-    case EGL_BAD_SURFACE:
-      return "EGL_BAD_SURFACE";
-    case EGL_BAD_MATCH:
-      return "EGL_BAD_MATCH";
-    case EGL_BAD_PARAMETER:
-      return "EGL_BAD_PARAMETER";
-    case EGL_BAD_NATIVE_PIXMAP:
-      return "EGL_BAD_NATIVE_PIXMAP";
-    case EGL_BAD_NATIVE_WINDOW:
-      return "EGL_BAD_NATIVE_WINDOW";
-    default:
-      return "UNKNOWN";
-  }
-}
-}  // namespace anonymous
-
-SharedEGLSurface::SharedEGLSurface(EGLSurface surface) : surface_(surface) {
 }
 
-SharedEGLSurface::~SharedEGLSurface() {
-  if (surface_) {
-    if (!eglDestroySurface(g_display, surface_)) {
-      LOG(ERROR) << "eglDestroySurface failed with error "
-                 << GetLastEGLErrorString();
-    }
-  }
+GLSurfaceEGL::GLSurfaceEGL() {
 }
 
-EGLSurface SharedEGLSurface::egl_surface() const {
-  return surface_;
+GLSurfaceEGL::~GLSurfaceEGL() {
 }
 
-bool BaseEGLContext::InitializeOneOff() {
+bool GLSurfaceEGL::InitializeOneOff() {
   static bool initialized = false;
   if (initialized)
     return true;
 
 #ifdef OS_LINUX
   EGLNativeDisplayType native_display = XOpenDisplay(NULL);
 #else
   EGLNativeDisplayType native_display = EGL_DEFAULT_DISPLAY;
 #endif
   g_display = eglGetDisplay(native_display);
@@ skipping 50 matching lines @@
                << GetLastEGLErrorString();
     return false;
   }
 
   g_config = configs[0];
 
   initialized = true;
   return true;
 }
 
-EGLDisplay BaseEGLContext::GetDisplay() {
+EGLDisplay GLSurfaceEGL::GetDisplay() {
   return g_display;
 }
 
-std::string BaseEGLContext::GetExtensions() {
-  const char* extensions = eglQueryString(g_display, EGL_EXTENSIONS);
-  if (!extensions)
-    return GLContext::GetExtensions();
-
-  return GLContext::GetExtensions() + " " + extensions;
+EGLConfig GLSurfaceEGL::GetConfig() {
+  return g_config;
 }
 
-NativeViewEGLContext::NativeViewEGLContext(void* window)
+NativeViewGLSurfaceEGL::NativeViewGLSurfaceEGL(void* window)
     : window_(window),
-      context_(NULL)
+      surface_(NULL)
 {
 }
 
-NativeViewEGLContext::~NativeViewEGLContext() {
+NativeViewGLSurfaceEGL::~NativeViewGLSurfaceEGL() {
+  Destroy();
 }
 
-bool NativeViewEGLContext::Initialize() {
-  DCHECK(!context_);
+bool NativeViewGLSurfaceEGL::Initialize() {
+  DCHECK(!surface_);
 
   // Create a surface for the native window.
   EGLNativeWindowType native_window =
       reinterpret_cast<EGLNativeWindowType>(window_);
-  surface_ = new SharedEGLSurface(eglCreateWindowSurface(g_display,
-                                                         g_config,
-                                                         native_window,
-                                                         NULL));
+  surface_ = eglCreateWindowSurface(g_display,
+                                    g_config,
+                                    native_window,
+                                    NULL);
 
-  if (!surface_->egl_surface()) {
+  if (!surface_) {
     LOG(ERROR) << "eglCreateWindowSurface failed with error "
                << GetLastEGLErrorString();
     Destroy();
     return false;
   }
 
-  static const EGLint kContextAttributes[] = {
-    EGL_CONTEXT_CLIENT_VERSION, 2,
-    EGL_NONE
-  };
-
-  context_ = eglCreateContext(g_display, g_config, NULL, kContextAttributes);
-  if (!context_) {
-    LOG(ERROR) << "eglCreateContext failed with error "
-               << GetLastEGLErrorString();
-    Destroy();
-    return false;
-  }
-
-  if (!MakeCurrent()) {
-    LOG(ERROR) << "MakeCurrent failed.";
-    Destroy();
-    return false;
-  }
-
-  if (!InitializeCommon()) {
-    LOG(ERROR) << "GLContext::InitializeCommon failed.";
-    Destroy();
-    return false;
-  }
-
   return true;
 }
 
-void NativeViewEGLContext::Destroy() {
-  if (context_) {
-    if (!eglDestroyContext(g_display, context_)) {
-      LOG(ERROR) << "eglDestroyContext failed with error "
+void NativeViewGLSurfaceEGL::Destroy() {
+  if (surface_) {
+    if (!eglDestroySurface(g_display, surface_)) {
+      LOG(ERROR) << "eglDestroySurface failed with error "
                  << GetLastEGLErrorString();
     }
-
-    context_ = NULL;
+    surface_ = NULL;
   }
-
-  surface_ = NULL;
 }
 
-bool NativeViewEGLContext::MakeCurrent() {
-  DCHECK(context_);
-  if (context_ == eglGetCurrentContext())
-      return true;
-  if (!eglMakeCurrent(g_display,
-                      surface_->egl_surface(),
-                      surface_->egl_surface(),
-                      context_)) {
-    VLOG(1) << "eglMakeCurrent failed with error "
-            << GetLastEGLErrorString();
-    return false;
-  }
-
-  return true;
-}
-
-bool NativeViewEGLContext::IsCurrent() {
-  DCHECK(context_);
-  return context_ == eglGetCurrentContext();
-}
-
-bool NativeViewEGLContext::IsOffscreen() {
+bool NativeViewGLSurfaceEGL::IsOffscreen() {
   return false;
 }
 
-bool NativeViewEGLContext::SwapBuffers() {
-  if (!eglSwapBuffers(g_display, surface_->egl_surface())) {
+bool NativeViewGLSurfaceEGL::SwapBuffers() {
+  if (!eglSwapBuffers(g_display, surface_)) {
     VLOG(1) << "eglSwapBuffers failed with error "
             << GetLastEGLErrorString();
     return false;
   }
 
   return true;
 }
 
-gfx::Size NativeViewEGLContext::GetSize() {
-#if defined(OS_WIN)
-  RECT rect;
-  if (!GetClientRect(static_cast<HWND>(window_), &rect)) {
-    DCHECK(false) << "GetClientRect failed.";
-    return gfx::Size();
-  }
-
-  return gfx::Size(rect.right - rect.left, rect.bottom - rect.top);
-#else
-  // TODO(piman): This doesn't work correctly on Windows yet, the size doesn't
-  // get updated on resize. When it does, we can share the code.
+gfx::Size NativeViewGLSurfaceEGL::GetSize() {
   EGLint width;
   EGLint height;
-  if (!eglQuerySurface(
-          g_display, surface_->egl_surface(), EGL_WIDTH, &width) ||
-      !eglQuerySurface(
-          g_display, surface_->egl_surface(), EGL_HEIGHT, &height)) {
+  if (!eglQuerySurface(g_display, surface_, EGL_WIDTH, &width) ||
+      !eglQuerySurface(g_display, surface_, EGL_HEIGHT, &height)) {
     NOTREACHED() << "eglQuerySurface failed with error "
                  << GetLastEGLErrorString();
     return gfx::Size();
   }
 
   return gfx::Size(width, height);
-#endif
 }
 
-void* NativeViewEGLContext::GetHandle() {
-  return context_;
-}
-
-void NativeViewEGLContext::SetSwapInterval(int interval) {
-  DCHECK(IsCurrent());
-  if (!eglSwapInterval(g_display, interval)) {
-    LOG(ERROR) << "eglSwapInterval failed with error "
-               << GetLastEGLErrorString();
-  }
-}
-
-SharedEGLSurface* NativeViewEGLContext::GetSurface() {
+EGLSurface NativeViewGLSurfaceEGL::GetHandle() {
   return surface_;
 }
 
-SecondaryEGLContext::SecondaryEGLContext()
-    : context_(NULL)
-{
+PbufferGLSurfaceEGL::PbufferGLSurfaceEGL(const gfx::Size& size)
+    : size_(size),
+      surface_(NULL) {
 }
 
-SecondaryEGLContext::~SecondaryEGLContext() {
+PbufferGLSurfaceEGL::~PbufferGLSurfaceEGL() {
+  Destroy();
 }
 
-bool SecondaryEGLContext::Initialize(GLContext* shared_context) {
-  DCHECK(!context_);
+bool PbufferGLSurfaceEGL::Initialize() {
+  DCHECK(!surface_);
 
-  static const EGLint kContextAttributes[] = {
-    EGL_CONTEXT_CLIENT_VERSION, 2,
+  const EGLint pbuffer_attribs[] = {
+    EGL_WIDTH, size_.width(),
+    EGL_HEIGHT, size_.height(),
     EGL_NONE
   };
 
-  if (shared_context) {
-    surface_ = static_cast<BaseEGLContext*>(shared_context)->GetSurface();
-
-    // Create a context.
-    context_ = eglCreateContext(g_display,
-                                g_config,
-                                shared_context->GetHandle(),
-                                kContextAttributes);
-  } else {
-#ifdef EGL_HAS_PBUFFERS
-    static const EGLint kPbufferAttribs[] = {
-      EGL_WIDTH, 1,
-      EGL_HEIGHT, 1,
-      EGL_NONE
-    };
-
-    surface_ = new SharedEGLSurface(eglCreatePbufferSurface(g_display,
-                                                            g_config,
-                                                            kPbufferAttribs));
-    if (!surface_->egl_surface()) {
-      LOG(ERROR) << "eglCreatePbufferSurface failed with error "
-                 << GetLastEGLErrorString();
-      Destroy();
-      return false;
-    }
-
-    context_ = eglCreateContext(g_display, g_config, NULL, kContextAttributes);
-#else
-    NOTIMPLEMENTED() << "Offscreen non-shared GLES context";
-    return false;
-#endif
-  }
-
-  if (!context_) {
-    LOG(ERROR) << "eglCreateContext failed with error "
+  surface_ = eglCreatePbufferSurface(g_display,
+                                     g_config,
+                                     pbuffer_attribs);
+  if (!surface_) {
+    LOG(ERROR) << "eglCreatePbufferSurface failed with error "
                << GetLastEGLErrorString();
     Destroy();
     return false;
   }
 
   return true;
 }
 
-void SecondaryEGLContext::Destroy() {
-  if (context_) {
-    if (!eglDestroyContext(g_display, context_)) {
-      LOG(ERROR) << "eglDestroyContext failed with error "
+void PbufferGLSurfaceEGL::Destroy() {
+  if (surface_) {
+    if (!eglDestroySurface(g_display, surface_)) {
+      LOG(ERROR) << "eglDestroySurface failed with error "
                  << GetLastEGLErrorString();
     }
-
-    context_ = NULL;
+    surface_ = NULL;
   }
-
-  surface_ = NULL;
 }
 
-bool SecondaryEGLContext::MakeCurrent() {
-  DCHECK(context_);
-  if (context_ == eglGetCurrentContext())
-      return true;
-  if (!eglMakeCurrent(g_display,
-                      surface_->egl_surface(),
-                      surface_->egl_surface(),
-                      context_)) {
-    VLOG(1) << "eglMakeCurrent failed with error "
-            << GetLastEGLErrorString();
-    return false;
-  }
-
+bool PbufferGLSurfaceEGL::IsOffscreen() {
   return true;
 }
 
-bool SecondaryEGLContext::IsCurrent() {
-  DCHECK(context_);
-  return context_ == eglGetCurrentContext();
-}
-
-bool SecondaryEGLContext::IsOffscreen() {
-  return true;
-}
-
-bool SecondaryEGLContext::SwapBuffers() {
-  NOTREACHED() << "Attempted to call SwapBuffers on a SecondaryEGLContext.";
+bool PbufferGLSurfaceEGL::SwapBuffers() {
+  NOTREACHED() << "Attempted to call SwapBuffers on a PbufferGLSurfaceEGL.";
   return false;
 }
 
-gfx::Size SecondaryEGLContext::GetSize() {
-  NOTREACHED() << "Should not be requesting size of this SecondaryEGLContext.";
-  return gfx::Size(1, 1);
+gfx::Size PbufferGLSurfaceEGL::GetSize() {
+  return size_;
 }
 
-void* SecondaryEGLContext::GetHandle() {
-  return context_;
-}
-
-void SecondaryEGLContext::SetSwapInterval(int interval) {
-  DCHECK(IsCurrent());
-  NOTREACHED() << "Attempt to call SetSwapInterval on a SecondaryEGLContext.";
-}
-
-SharedEGLSurface* SecondaryEGLContext::GetSurface() {
+EGLSurface PbufferGLSurfaceEGL::GetHandle() {
   return surface_;
 }
 
 }  // namespace gfx