Vend common GL context

chrome/browser/renderer_host/accelerated_surface_container_touch.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 "chrome/browser/renderer_host/accelerated_surface_container_touch.h"
 
 #include <X11/Xlib.h>
 #include <X11/extensions/Xcomposite.h>
 
 #include "base/memory/scoped_ptr.h"
 #include "third_party/angle/include/EGL/egl.h"
 #include "third_party/angle/include/EGL/eglext.h"
 #include "ui/gfx/gl/gl_bindings.h"
 #include "ui/gfx/gl/gl_implementation.h"
 #include "ui/gfx/gl/gl_surface_egl.h"
+#include "ui/gfx/gl/gl_surface_glx.h"
 #include "ui/gfx/rect.h"
-#include "ui/gfx/gl/gl_surface_glx.h"
 #include "ui/gfx/transform.h"
 
 namespace {
 
 class AcceleratedSurfaceContainerTouchEGL
     : public AcceleratedSurfaceContainerTouch {
  public:
-  AcceleratedSurfaceContainerTouchEGL(ui::CompositorGL* compositor,
-                                      const gfx::Size& size,
+  AcceleratedSurfaceContainerTouchEGL(const gfx::Size& size,
                                       uint64 surface_handle);
   // TextureGL implementation
   virtual void Draw(const ui::TextureDrawParams& params,
                     const gfx::Rect& clip_bounds_in_texture) OVERRIDE;
 
  private:
   ~AcceleratedSurfaceContainerTouchEGL();
 
   void* image_;
+
   DISALLOW_COPY_AND_ASSIGN(AcceleratedSurfaceContainerTouchEGL);
 };
 
 class AcceleratedSurfaceContainerTouchGLX
     : public AcceleratedSurfaceContainerTouch {
  public:
-  AcceleratedSurfaceContainerTouchGLX(ui::CompositorGL* compositor,
-                                      const gfx::Size& size,
+  AcceleratedSurfaceContainerTouchGLX(const gfx::Size& size,
                                       uint64 surface_handle);
   // TextureGL implementation
   virtual void Draw(const ui::TextureDrawParams& params,
                     const gfx::Rect& clip_bounds_in_texture) OVERRIDE;
 
  private:
   ~AcceleratedSurfaceContainerTouchGLX();
 
   XID pixmap_;
   XID glx_pixmap_;
+
   DISALLOW_COPY_AND_ASSIGN(AcceleratedSurfaceContainerTouchGLX);
 };
 
 class ScopedPtrXFree {
  public:
   void operator()(void* x) const {
     ::XFree(x);
   }
 };
 
 AcceleratedSurfaceContainerTouchEGL::AcceleratedSurfaceContainerTouchEGL(
-    ui::CompositorGL* compositor,
     const gfx::Size& size,
     uint64 surface_handle)
-    : AcceleratedSurfaceContainerTouch(compositor, size),
+    : AcceleratedSurfaceContainerTouch(size),
       image_(NULL) {
-  compositor_->MakeCurrent();
+  ui::SharedResources* instance = ui::SharedResources::GetInstance();
+  DCHECK(instance);
+  instance->MakeSharedContextCurrent();
 
   image_ = eglCreateImageKHR(
       gfx::GLSurfaceEGL::GetHardwareDisplay(), EGL_NO_CONTEXT,
       EGL_NATIVE_PIXMAP_KHR, reinterpret_cast<void*>(surface_handle), NULL);
 
   glGenTextures(1, &texture_id_);
   glBindTexture(GL_TEXTURE_2D, texture_id_);
   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
   glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, image_);
   glFlush();
 }
 
 AcceleratedSurfaceContainerTouchEGL::~AcceleratedSurfaceContainerTouchEGL() {
+  ui::SharedResources* instance = ui::SharedResources::GetInstance();
+  DCHECK(instance);
+  instance->MakeSharedContextCurrent();
+
   eglDestroyImageKHR(gfx::GLSurfaceEGL::GetHardwareDisplay(), image_);
   glFlush();
 }
 
 void AcceleratedSurfaceContainerTouchEGL::Draw(
     const ui::TextureDrawParams& params,
     const gfx::Rect& clip_bounds_in_texture) {
-  DCHECK(compositor_->program_no_swizzle());
+  ui::SharedResources* instance = ui::SharedResources::GetInstance();
+  DCHECK(instance);
 
   ui::TextureDrawParams modified_params = params;
 
   // Texture from GPU is flipped vertically.
   ui::Transform flipped;
   flipped.SetScaleY(-1.0);
   flipped.SetTranslateY(size_.height());
   flipped.ConcatTransform(params.transform);
 
   modified_params.transform = flipped;
 
-  DrawInternal(*compositor_->program_no_swizzle(),
+  DrawInternal(*instance->program_no_swizzle(),
                modified_params,
                clip_bounds_in_texture);
 }
 
 AcceleratedSurfaceContainerTouchGLX::AcceleratedSurfaceContainerTouchGLX(
-    ui::CompositorGL* compositor,
     const gfx::Size& size,
     uint64 surface_handle)
-    : AcceleratedSurfaceContainerTouch(compositor, size),
+    : AcceleratedSurfaceContainerTouch(size),
       pixmap_(0),
       glx_pixmap_(0) {
+  ui::SharedResources* instance = ui::SharedResources::GetInstance();
+  DCHECK(instance);
+  instance->MakeSharedContextCurrent();
+
   // Create pixmap from window.
   Display* dpy = gfx::GLSurfaceGLX::GetDisplay();
   int event_base, error_base;
   if (XCompositeQueryExtension(dpy, &event_base, &error_base)) {
     int major = 0, minor = 2;
     XCompositeQueryVersion(dpy, &major, &minor);
     if (major == 0 && minor < 2) {
       LOG(ERROR) << "Pixmap from window not supported.";
       return;
     }
@@ skipping 51 matching lines @@
   const int pixmapAttribs[] = {
     GLX_TEXTURE_TARGET_EXT, GLX_TEXTURE_2D_EXT,
     GLX_TEXTURE_FORMAT_EXT, GLX_TEXTURE_FORMAT_RGB_EXT,
     0
   };
 
   glx_pixmap_ = glXCreatePixmap(
       dpy, fbconfigs.get()[config], pixmap_, pixmapAttribs);
 
   // Create texture.
-  compositor_->MakeCurrent();
   glGenTextures(1, &texture_id_);
   glBindTexture(GL_TEXTURE_2D, texture_id_);
   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 }
 
 AcceleratedSurfaceContainerTouchGLX::~AcceleratedSurfaceContainerTouchGLX() {
+  ui::SharedResources* instance = ui::SharedResources::GetInstance();
+  DCHECK(instance);
+  instance->MakeSharedContextCurrent();
+
   Display* dpy = gfx::GLSurfaceGLX::GetDisplay();
   if (glx_pixmap_)
     glXDestroyGLXPixmap(dpy, glx_pixmap_);
   if (pixmap_)
     XFreePixmap(dpy, pixmap_);
 }
 
 void AcceleratedSurfaceContainerTouchGLX::Draw(
     const ui::TextureDrawParams& params,
     const gfx::Rect& clip_bounds_in_texture) {
-  DCHECK(compositor_->program_no_swizzle());
+  ui::SharedResources* instance = ui::SharedResources::GetInstance();
+  DCHECK(instance);
+
   Display* dpy = gfx::GLSurfaceGLX::GetDisplay();
 
   glBindTexture(GL_TEXTURE_2D, texture_id_);
   glXBindTexImageEXT(dpy, glx_pixmap_, GLX_FRONT_LEFT_EXT, NULL);
-  DrawInternal(*compositor_->program_no_swizzle(),
+  DrawInternal(*instance->program_no_swizzle(),
                params,
                clip_bounds_in_texture);
   glXReleaseTexImageEXT(dpy, glx_pixmap_, GLX_FRONT_LEFT_EXT);
 }
 
 }  // namespace
 
 AcceleratedSurfaceContainerTouch::AcceleratedSurfaceContainerTouch(
-    ui::CompositorGL* compositor,
-    const gfx::Size& size) :
-        TextureGL(compositor, size) {
+    const gfx::Size& size) : TextureGL(size) {
 }
 
 // static
 AcceleratedSurfaceContainerTouch*
 AcceleratedSurfaceContainerTouch::CreateAcceleratedSurfaceContainer(
-    ui::CompositorGL* compositor,
     const gfx::Size& size,
     uint64 surface_handle) {
   switch (gfx::GetGLImplementation()) {
     case gfx::kGLImplementationDesktopGL:
-      return new AcceleratedSurfaceContainerTouchGLX(compositor,
-                                                     size,
+      return new AcceleratedSurfaceContainerTouchGLX(size,
                                                      surface_handle);
     case gfx::kGLImplementationEGLGLES2:
-      return new AcceleratedSurfaceContainerTouchEGL(compositor,
-                                                     size,
+      return new AcceleratedSurfaceContainerTouchEGL(size,
                                                      surface_handle);
     default:
       NOTREACHED();
       return NULL;
   }
 }
 
 void AcceleratedSurfaceContainerTouch::SetCanvas(
     const SkCanvas& canvas,
     const gfx::Point& origin,
     const gfx::Size& overall_size) {
   NOTREACHED();
 }