291 lines
8.2 KiB
C++
291 lines
8.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s): Sergei Dolgov
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsDrawingSurfaceBeOS.h"
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#include "nsCoord.h"
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#include <Region.h>
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NS_IMPL_ISUPPORTS2(nsDrawingSurfaceBeOS, nsIDrawingSurface, nsIDrawingSurfaceBeOS)
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#ifdef CHEAP_PERFORMANCE_MEASUREMENT
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static PRTime mLockTime, mUnlockTime;
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#endif
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nsDrawingSurfaceBeOS :: nsDrawingSurfaceBeOS()
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{
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mView = nsnull;
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mBitmap = nsnull;
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mWidth = 0;
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mHeight = 0;
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mLockFlags = 0;
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mLocked = PR_FALSE;
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}
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nsDrawingSurfaceBeOS :: ~nsDrawingSurfaceBeOS()
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{
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if(mBitmap)
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{
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// Deleting mBitmap will also remove and delete any child views
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mBitmap->Unlock();
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delete mBitmap;
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mView = nsnull;
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mBitmap = nsnull;
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}
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}
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/**
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* Lock a rect of a drawing surface and return a
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* pointer to the upper left hand corner of the
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* bitmap.
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* @param aX x position of subrect of bitmap
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* @param aY y position of subrect of bitmap
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* @param aWidth width of subrect of bitmap
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* @param aHeight height of subrect of bitmap
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* @param aBits out parameter for upper left hand
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* corner of bitmap
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* @param aStride out parameter for number of bytes
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* to add to aBits to go from scanline to scanline
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* @param aWidthBytes out parameter for number of
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* bytes per line in aBits to process aWidth pixels
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* @return error status
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*
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**/
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NS_IMETHODIMP nsDrawingSurfaceBeOS :: Lock(PRInt32 aX, PRInt32 aY,
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PRUint32 aWidth, PRUint32 aHeight,
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void **aBits, PRInt32 *aStride,
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PRInt32 *aWidthBytes, PRUint32 aFlags)
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{
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mLockFlags = aFlags;
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if (mBitmap && !mLocked)
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{
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if (mView)
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mView->Sync();
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if (mLockFlags & NS_LOCK_SURFACE_READ_ONLY)
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mBitmap->LockBits();
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*aStride = mBitmap->BytesPerRow();
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*aBits = (uint8 *)mBitmap->Bits() + aX*4 + *aStride * aY;
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*aWidthBytes = aWidth*4;
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mLocked = PR_TRUE;
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}
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else
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{
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NS_ASSERTION(0, "nested lock attempt");
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return NS_ERROR_FAILURE;
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}
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return NS_OK;
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}
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NS_IMETHODIMP nsDrawingSurfaceBeOS :: Unlock(void)
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{
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if (mBitmap && mLocked)
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{
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if (mLockFlags & NS_LOCK_SURFACE_READ_ONLY)
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mBitmap->UnlockBits();
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mLocked = PR_FALSE;
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}
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return NS_OK;
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}
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NS_IMETHODIMP nsDrawingSurfaceBeOS :: GetDimensions(PRUint32 *aWidth, PRUint32 *aHeight)
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{
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*aWidth = mWidth;
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*aHeight = mHeight;
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return NS_OK;
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}
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NS_IMETHODIMP nsDrawingSurfaceBeOS :: IsOffscreen(PRBool *aOffScreen)
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{
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*aOffScreen = mIsOffscreen;//mBitmap ? PR_TRUE : PR_FALSE;
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return NS_OK;
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}
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NS_IMETHODIMP nsDrawingSurfaceBeOS :: IsPixelAddressable(PRBool *aAddressable)
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{
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*aAddressable = PR_FALSE;
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return NS_OK;
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}
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NS_IMETHODIMP nsDrawingSurfaceBeOS :: GetPixelFormat(nsPixelFormat *aFormat)
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{
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*aFormat = mPixFormat;
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return NS_OK;
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}
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NS_IMETHODIMP nsDrawingSurfaceBeOS :: Init(BView *aView)
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{
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if (aView->LockLooper())
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{
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//remember dimensions
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BRect r = aView->Bounds();
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mWidth = nscoord(r.IntegerWidth() + 1);
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mHeight = nscoord(r.IntegerHeight() + 1);
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mView = aView;
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aView->UnlockLooper();
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}
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// onscreen View, attached to BWindow, acquired via GetNativeData() call in nsRendering
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mIsOffscreen = PR_FALSE;
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return NS_OK;
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}
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NS_IMETHODIMP nsDrawingSurfaceBeOS :: Init(BView *aView, PRUint32 aWidth,
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PRUint32 aHeight, PRUint32 aFlags)
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{
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NS_ASSERTION(!(aView == nsnull), "null BView");
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//remember dimensions
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mWidth=aWidth;
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mHeight=aHeight;
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mFlags = aFlags;
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//creating offscreen backbuffer surface
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mIsOffscreen = PR_TRUE;
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//TODO: Maybe we should reuse BView by resizing it,
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//and also reuse BBitmap if new size is = < of current size
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BRect r(0,0, mWidth-1, mHeight-1);
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//creating auxiliary BView to draw on offscreen BBitmap
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mView = new BView(r, "", 0, 0);
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if (!mView)
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return NS_ERROR_OUT_OF_MEMORY;
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//if((aFlags & NS_CREATEDRAWINGSURFACE_FOR_PIXEL_ACCESS) &&
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// (aWidth > 0) && (aHeight > 0))
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if (aWidth > 0 && aHeight > 0)
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{
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///creating offscreen BBitmap
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mBitmap = new BBitmap(r, B_RGBA32, true);
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if (!mBitmap)
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return NS_ERROR_OUT_OF_MEMORY;
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if (mBitmap->InitCheck()!=B_OK)
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{
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//for some reason, the bitmap isn't valid - delete the
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//bitmap object, then indicate failure
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delete mBitmap;
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mBitmap=NULL;
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return NS_ERROR_FAILURE;
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}
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//NB! Locking bitmap for lifetime to avoid unneccessary locking at each
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//drawing primitive call. Locking is quite time-expensive.
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//To avoid it, we call surface->LockDrawable() instead LockLooper()
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mBitmap->Lock();
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//Setting ViewColor transparent noticeably decreases AppServer load in DrawBitmp()
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//Applicable here, because Mozilla paints backgrounds explicitly, with images or filling areas.
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mView->SetViewColor(B_TRANSPARENT_32_BIT);
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mBitmap->AddChild(mView);
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// Import prototype onscreen view state
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if (aView && aView->LockLooper())
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{
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BRegion region;
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BFont font;
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mView->SetHighColor(aView->HighColor());
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mView->SetLowColor(aView->LowColor());
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aView->GetFont(&font);
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mView->SetFont(&font);
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aView->GetClippingRegion(®ion);
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mView->ConstrainClippingRegion(®ion);
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mView->SetOrigin(aView->Origin());
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mView->SetFlags(aView->Flags());
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aView->UnlockLooper();
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}
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}
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return NS_OK;
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}
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NS_IMETHODIMP nsDrawingSurfaceBeOS :: AcquireView(BView **aView)
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{
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*aView = mView;
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return NS_OK;
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}
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NS_IMETHODIMP nsDrawingSurfaceBeOS :: AcquireBitmap(BBitmap **aBitmap)
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{
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if (mBitmap && mView)
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{
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mView->Sync();
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}
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*aBitmap = mBitmap;
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return NS_OK;
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}
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NS_IMETHODIMP nsDrawingSurfaceBeOS :: ReleaseView(void)
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{
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return NS_OK;
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}
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NS_IMETHODIMP nsDrawingSurfaceBeOS :: ReleaseBitmap(void)
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{
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return NS_OK;
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}
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bool nsDrawingSurfaceBeOS :: LockDrawable()
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{
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//TODO: try to avoid exta locking also for onscreen BView.
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//Perhaps it needs synchronization with widget through nsToolkit and lock counting.
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bool rv = false;
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if (!mBitmap)
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{
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// Non-bitmap (BWindowed) view - lock it as required if exists
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rv = mView && mView->LockLooper();
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}
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else
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{
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// Was locked in Init(), only test for locked state here
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rv = mBitmap->IsLocked();
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}
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return rv;
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}
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void nsDrawingSurfaceBeOS :: UnlockDrawable()
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{
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// Do nothing, bitmap is locked for lifetime in our implementation
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if (mBitmap)
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return;
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// Non-bitmap (BWindowed) view - unlock it as required.
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// mBitmap may be gone in destroy process, so additional check for Looper()
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if (mView && mView->Looper())
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mView->UnlockLooper();
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}
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