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// Copyright (c) 2012 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.
#ifndef UI_ACCELERATED_WIDGET_MAC_IO_SURFACE_TEXTURE_H_
#define UI_ACCELERATED_WIDGET_MAC_IO_SURFACE_TEXTURE_H_
#include <deque>
#include <list>
#include <vector>
#import <Cocoa/Cocoa.h>
#include <IOSurface/IOSurfaceAPI.h>
#include <QuartzCore/QuartzCore.h>
#include "base/callback.h"
#include "base/lazy_instance.h"
#include "base/mac/scoped_cftyperef.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/time/time.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/native_widget_types.h"
class SkBitmap;
namespace gfx {
class Rect;
}
namespace ui {
class IOSurfaceContext;
class RenderWidgetHostViewFrameSubscriber;
class RenderWidgetHostViewMac;
// This class manages an OpenGL context and IOSurfaceTexture for the accelerated
// compositing code path. The GL context is attached to
// RenderWidgetHostViewCocoa for blitting the IOSurfaceTexture.
class IOSurfaceTexture
: public base::RefCounted<IOSurfaceTexture> {
public:
// Returns NULL if IOSurfaceTexture or GL API calls fail.
static scoped_refptr<IOSurfaceTexture> Create(
bool needs_gl_finish_workaround);
// Set IOSurfaceTexture that will be drawn on the next NSView drawRect.
bool SetIOSurface(
IOSurfaceID io_surface_id,
const gfx::Size& pixel_size) WARN_UNUSED_RESULT;
// Blit the IOSurface to the rectangle specified by |window_rect| in DIPs,
// with the origin in the lower left corner. If the window rect's size is
// larger than the IOSurface, the remaining right and bottom edges will be
// white. |window_scale_factor| is 1 in normal views, 2 in HiDPI views.
bool DrawIOSurface() WARN_UNUSED_RESULT;
// Returns true if the offscreen context used by this surface has been
// poisoned.
bool HasBeenPoisoned() const;
private:
friend class base::RefCounted<IOSurfaceTexture>;
IOSurfaceTexture(
const scoped_refptr<IOSurfaceContext>& context,
bool needs_gl_finish_workaround);
~IOSurfaceTexture();
// Unref the IOSurfaceTexture and delete the associated GL texture. If the GPU
// process is no longer referencing it, this will delete the IOSurface.
void ReleaseIOSurfaceAndTexture();
// Check for GL errors and store the result in error_. Only return new
// errors
GLenum GetAndSaveGLError();
// Offscreen context used for all operations other than drawing to the
// screen. This is in the same share group as the contexts used for
// drawing, and is the same for all IOSurfaces in all windows.
scoped_refptr<IOSurfaceContext> offscreen_context_;
// The IOSurface and its non-rounded size.
base::ScopedCFTypeRef<IOSurfaceRef> io_surface_;
gfx::Size pixel_size_;
// The "live" OpenGL texture referring to this IOSurfaceRef. Note
// that per the CGLTexImageIOSurface2D API we do not need to
// explicitly update this texture's contents once created. All we
// need to do is ensure it is re-bound before attempting to draw
// with it.
GLuint texture_;
// Error saved by GetAndSaveGLError
GLint gl_error_;
// Aggressive IOSurface eviction logic. When using CoreAnimation, IOSurfaces
// are used only transiently to transfer from the GPU process to the browser
// process. Once the IOSurface has been drawn to its CALayer, the CALayer
// will not need updating again until its view is hidden and re-shown.
// Aggressively evict surfaces when more than 8 (the number allowed by the
// memory manager for fast tab switching) are allocated.
enum {
kMaximumUnevictedSurfaces = 8,
};
typedef std::list<IOSurfaceTexture*> EvictionQueue;
void EvictionMarkUpdated();
void EvictionMarkEvicted();
EvictionQueue::iterator eviction_queue_iterator_;
bool eviction_has_been_drawn_since_updated_;
const bool needs_gl_finish_workaround_;
static void EvictionScheduleDoEvict();
static void EvictionDoEvict();
static base::LazyInstance<EvictionQueue> eviction_queue_;
static bool eviction_scheduled_;
};
} // namespace ui
#endif // UI_ACCELERATED_WIDGET_MAC_IO_SURFACE_TEXTURE_H_
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