| /* |
| * Copyright (c) 1996, 2006, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #ifndef AWT_GDIOBJECT_H |
| #define AWT_GDIOBJECT_H |
| |
| #include "awt.h" |
| #include "Hashtable.h" |
| #include "GDIHashtable.h" |
| |
| #define MEMORY_OVER_SPEED 1 |
| |
| typedef struct { |
| HDC hDC; |
| BOOL gdiLimitReached; |
| } GetDCReturnStruct; |
| |
| /* |
| * An AwtGDIObject is a cached, color-based GDI object, such as a pen or |
| * brush. This class also includes static methods for tracking the |
| * total number of active GDI Objects (Pen, Brush, and HDC). |
| */ |
| class AwtGDIObject { |
| public: |
| INLINE COLORREF GetColor() { return m_color; } |
| INLINE void SetColor(COLORREF color) { m_color = color; } |
| |
| INLINE HGDIOBJ GetHandle() { return m_handle; } |
| INLINE void SetHandle(HGDIOBJ handle) { m_handle = handle; } |
| |
| /* |
| * NOTE: we don't syncronize access to the reference counter. |
| * Currently it is changed only when we are already synchronized |
| * on the global BatchDestructionManager lock. |
| */ |
| INLINE int GetRefCount() { return m_refCount; } |
| INLINE int IncrRefCount() { return ++m_refCount; } |
| INLINE int DecrRefCount() { return --m_refCount; } |
| |
| /* |
| * Decrement the reference count of a cached GDI object. When it hits |
| * zero, notify the cache that the object can be safely removed. |
| * The cache will eventually delete the GDI object and this wrapper. |
| */ |
| INLINE void Release() { |
| #if MEMORY_OVER_SPEED |
| ReleaseInCache(); |
| #endif |
| } |
| |
| // Workaround for Windows bug: do not let process have more than |
| // a set number of active (unreleased) GDI objects at any given time. |
| static BOOL IncrementIfAvailable(); |
| static void Decrement(); |
| static BOOL EnsureGDIObjectAvailability(); |
| |
| protected: |
| /* |
| * Get a GDI object from its respective cache. If it doesn't exist |
| * it gets created, otherwise its reference count gets bumped. |
| */ |
| static AwtGDIObject* Get(COLORREF color); |
| |
| virtual void ReleaseInCache() = 0; |
| |
| INLINE AwtGDIObject() { |
| m_handle = NULL; |
| m_refCount = 0; |
| } |
| |
| virtual ~AwtGDIObject() { |
| if (m_handle != NULL) { |
| ::DeleteObject(m_handle); |
| Decrement(); |
| } |
| } |
| |
| private: |
| static int GetMaxGDILimit(); |
| |
| COLORREF m_color; |
| HGDIOBJ m_handle; |
| int m_refCount; |
| static CriticalSection* objectCounterLock; |
| static int numCurrentObjects; |
| static int maxGDIObjects; |
| }; |
| |
| #endif // AWT_GDIOBJECT_H |