Delete non-CoreAnimation code in RWHVMac

content/browser/renderer_host/compositing_iosurface_context_mac.mm

 // Copyright (c) 2013 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 "content/browser/renderer_host/compositing_iosurface_context_mac.h"
 
 #include <OpenGL/gl.h>
 #include <OpenGL/OpenGL.h>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "content/browser/renderer_host/compositing_iosurface_shader_programs_mac.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
 #include "ui/base/ui_base_switches.h"
 #include "ui/gl/gl_switches.h"
 #include "ui/gl/gpu_switching_manager.h"
 
 namespace content {
 
-CoreAnimationStatus GetCoreAnimationStatus() {
-  static CoreAnimationStatus status =
-      CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kDisableCoreAnimation) ?
-              CORE_ANIMATION_DISABLED : CORE_ANIMATION_ENABLED;
-  return status;
-}
-
 // static
 scoped_refptr<CompositingIOSurfaceContext>
 CompositingIOSurfaceContext::Get(int window_number) {
   TRACE_EVENT0("browser", "CompositingIOSurfaceContext::Get");
 
   // Return the context for this window_number, if it exists.
   WindowMap::iterator found = window_map()->find(window_number);
   if (found != window_map()->end()) {
     DCHECK(!found->second->poisoned_);
     return found->second;
   }
 
   static bool is_vsync_disabled =
       CommandLine::ForCurrentProcess()->HasSwitch(switches::kDisableGpuVsync);
 
-  base::scoped_nsobject<NSOpenGLContext> nsgl_context;
   base::ScopedTypeRef<CGLContextObj> cgl_context_strong;
   CGLContextObj cgl_context = NULL;
-  if (GetCoreAnimationStatus() == CORE_ANIMATION_DISABLED) {
-    std::vector<NSOpenGLPixelFormatAttribute> attributes;
-    attributes.push_back(NSOpenGLPFADoubleBuffer);
-    // We don't need a depth buffer - try setting its size to 0...
-    attributes.push_back(NSOpenGLPFADepthSize); attributes.push_back(0);
-    if (ui::GpuSwitchingManager::GetInstance()->SupportsDualGpus())
-      attributes.push_back(NSOpenGLPFAAllowOfflineRenderers);
-    attributes.push_back(0);
+  CGLError error = kCGLNoError;
 
-    base::scoped_nsobject<NSOpenGLPixelFormat> glPixelFormat(
-        [[NSOpenGLPixelFormat alloc] initWithAttributes:&attributes.front()]);
-    if (!glPixelFormat) {
-      LOG(ERROR) << "NSOpenGLPixelFormat initWithAttributes failed";
-      return NULL;
-    }
+  // Create the pixel format object for the context.
+  std::vector<CGLPixelFormatAttribute> attribs;
+  attribs.push_back(kCGLPFADepthSize);
+  attribs.push_back(static_cast<CGLPixelFormatAttribute>(0));
+  if (ui::GpuSwitchingManager::GetInstance()->SupportsDualGpus()) {
+    attribs.push_back(kCGLPFAAllowOfflineRenderers);
+    attribs.push_back(static_cast<CGLPixelFormatAttribute>(1));
+  }
+  attribs.push_back(static_cast<CGLPixelFormatAttribute>(0));
+  GLint number_virtual_screens = 0;
+  base::ScopedTypeRef<CGLPixelFormatObj> pixel_format;
+  error = CGLChoosePixelFormat(&attribs.front(),
+                               pixel_format.InitializeInto(),
+                               &number_virtual_screens);
+  if (error != kCGLNoError) {
+    LOG(ERROR) << "Failed to create pixel format object.";
+    return NULL;
+  }
 
-    // Create all contexts in the same share group so that the textures don't
-    // need to be recreated when transitioning contexts.
-    NSOpenGLContext* share_context = nil;
-    if (!window_map()->empty())
-      share_context = window_map()->begin()->second->nsgl_context();
-    nsgl_context.reset(
-        [[NSOpenGLContext alloc] initWithFormat:glPixelFormat
-                                   shareContext:share_context]);
-    if (!nsgl_context) {
-      LOG(ERROR) << "NSOpenGLContext initWithFormat failed";
-      return NULL;
-    }
+  // Create all contexts in the same share group so that the textures don't
+  // need to be recreated when transitioning contexts.
+  CGLContextObj share_context = NULL;
+  if (!window_map()->empty())
+    share_context = window_map()->begin()->second->cgl_context();
+  error = CGLCreateContext(
+      pixel_format, share_context, cgl_context_strong.InitializeInto());
+  if (error != kCGLNoError) {
+    LOG(ERROR) << "Failed to create context object.";
+    return NULL;
+  }
+  cgl_context = cgl_context_strong;
 
-    // Grab the CGL context that the NSGL context is using. Explicitly
-    // retain it, so that it is not double-freed by the scoped type.
-    cgl_context = reinterpret_cast<CGLContextObj>(
-        [nsgl_context CGLContextObj]);
-    if (!cgl_context) {
-      LOG(ERROR) << "Failed to retrieve CGLContextObj from NSOpenGLContext";
-      return NULL;
-    }
-
-    // Force [nsgl_context flushBuffer] to wait for vsync.
-    GLint swapInterval = is_vsync_disabled ? 0 : 1;
-    [nsgl_context setValues:&swapInterval forParameter:NSOpenGLCPSwapInterval];
-  } else {
-    CGLError error = kCGLNoError;
-
-    // Create the pixel format object for the context.
-    std::vector<CGLPixelFormatAttribute> attribs;
-    attribs.push_back(kCGLPFADepthSize);
-    attribs.push_back(static_cast<CGLPixelFormatAttribute>(0));
-    if (ui::GpuSwitchingManager::GetInstance()->SupportsDualGpus()) {
-      attribs.push_back(kCGLPFAAllowOfflineRenderers);
-      attribs.push_back(static_cast<CGLPixelFormatAttribute>(1));
-    }
-    attribs.push_back(static_cast<CGLPixelFormatAttribute>(0));
-    GLint number_virtual_screens = 0;
-    base::ScopedTypeRef<CGLPixelFormatObj> pixel_format;
-    error = CGLChoosePixelFormat(&attribs.front(),
-                                 pixel_format.InitializeInto(),
-                                 &number_virtual_screens);
-    if (error != kCGLNoError) {
-      LOG(ERROR) << "Failed to create pixel format object.";
-      return NULL;
-    }
-
-    // Create all contexts in the same share group so that the textures don't
-    // need to be recreated when transitioning contexts.
-    CGLContextObj share_context = NULL;
-    if (!window_map()->empty())
-      share_context = window_map()->begin()->second->cgl_context();
-    error = CGLCreateContext(
-        pixel_format, share_context, cgl_context_strong.InitializeInto());
-    if (error != kCGLNoError) {
-      LOG(ERROR) << "Failed to create context object.";
-      return NULL;
-    }
-    cgl_context = cgl_context_strong;
-
-    // Note that VSync is ignored because CoreAnimation will automatically
-    // rate limit draws.
-  }
+  // Note that VSync is ignored because CoreAnimation will automatically
+  // rate limit draws.
 
   // Prepare the shader program cache. Precompile the shader programs
   // needed to draw the IO Surface for non-offscreen contexts.
   bool prepared = false;
   scoped_ptr<CompositingIOSurfaceShaderPrograms> shader_program_cache;
   {
     gfx::ScopedCGLSetCurrentContext scoped_set_current_context(cgl_context);
     shader_program_cache.reset(new CompositingIOSurfaceShaderPrograms());
     if (window_number == kOffscreenContextWindowNumber) {
       prepared = true;
     } else {
       prepared = (
           shader_program_cache->UseBlitProgram() &&
           shader_program_cache->UseSolidWhiteProgram());
     }
     glUseProgram(0u);
   }
   if (!prepared) {
     LOG(ERROR) << "IOSurface failed to compile/link required shader programs.";
     return NULL;
   }
 
   return new CompositingIOSurfaceContext(
       window_number,
-      nsgl_context.release(),
       cgl_context_strong,
       cgl_context,
       is_vsync_disabled,
       shader_program_cache.Pass());
 }
 
 void CompositingIOSurfaceContext::PoisonContextAndSharegroup() {
   if (poisoned_)
     return;
 
   for (WindowMap::iterator it = window_map()->begin();
        it != window_map()->end();
        ++it) {
     it->second->poisoned_ = true;
   }
   window_map()->clear();
 }
 
 CompositingIOSurfaceContext::CompositingIOSurfaceContext(
     int window_number,
-    NSOpenGLContext* nsgl_context,
     base::ScopedTypeRef<CGLContextObj> cgl_context_strong,
     CGLContextObj cgl_context,
     bool is_vsync_disabled,
     scoped_ptr<CompositingIOSurfaceShaderPrograms> shader_program_cache)
     : window_number_(window_number),
-      nsgl_context_(nsgl_context),
       cgl_context_strong_(cgl_context_strong),
       cgl_context_(cgl_context),
       is_vsync_disabled_(is_vsync_disabled),
       shader_program_cache_(shader_program_cache.Pass()),
       poisoned_(false) {
   DCHECK(window_map()->find(window_number_) == window_map()->end());
   window_map()->insert(std::make_pair(window_number_, this));
 
   GpuDataManager::GetInstance()->AddObserver(this);
 }
 
 CompositingIOSurfaceContext::~CompositingIOSurfaceContext() {
   GpuDataManager::GetInstance()->RemoveObserver(this);
 
   {
     gfx::ScopedCGLSetCurrentContext scoped_set_current_context(cgl_context_);
     shader_program_cache_->Reset();
   }
   if (!poisoned_) {
     DCHECK(window_map()->find(window_number_) != window_map()->end());
     DCHECK(window_map()->find(window_number_)->second == this);
     window_map()->erase(window_number_);
   } else {
     WindowMap::const_iterator found = window_map()->find(window_number_);
     if (found != window_map()->end())
       DCHECK(found->second != this);
   }
 }
 
-NSOpenGLContext* CompositingIOSurfaceContext::nsgl_context() const {
-  // This should not be called from any CoreAnimation paths.
-  CHECK(GetCoreAnimationStatus() == CORE_ANIMATION_DISABLED);
-  return nsgl_context_;
-}
-
 void CompositingIOSurfaceContext::OnGpuSwitching() {
   // Recreate all browser-side GL contexts whenever the GPU switches. If this
   // is not done, performance will suffer.
   // http://crbug.com/361493
   PoisonContextAndSharegroup();
 }
 
 // static
 CompositingIOSurfaceContext::WindowMap*
     CompositingIOSurfaceContext::window_map() {
   return window_map_.Pointer();
 }
 
 // static
 base::LazyInstance<CompositingIOSurfaceContext::WindowMap>
     CompositingIOSurfaceContext::window_map_;
 
 }  // namespace content