mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-04 19:33:18 +00:00
169 lines
6.4 KiB
C++
169 lines
6.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Netscape Public License
|
|
* Version 1.1 (the "License"); you may not use this file except in
|
|
* compliance with the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/NPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is mozilla.org code.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Netscape Communications Corporation.
|
|
* Portions created by the Initial Developer are Copyright (C) 1998
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the NPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the NPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#ifndef nsIDrawingSurface_h___
|
|
#define nsIDrawingSurface_h___
|
|
|
|
#include "nscore.h"
|
|
#include "nsISupports.h"
|
|
|
|
// a memory area that can be rendered to
|
|
|
|
typedef struct
|
|
{
|
|
PRUint32 mRedZeroMask; //red color mask in zero position
|
|
PRUint32 mGreenZeroMask; //green color mask in zero position
|
|
PRUint32 mBlueZeroMask; //blue color mask in zero position
|
|
PRUint32 mAlphaZeroMask; //alpha data mask in zero position
|
|
PRUint32 mRedMask; //red color mask
|
|
PRUint32 mGreenMask; //green color mask
|
|
PRUint32 mBlueMask; //blue color mask
|
|
PRUint32 mAlphaMask; //alpha data mask
|
|
PRUint8 mRedCount; //number of red color bits
|
|
PRUint8 mGreenCount; //number of green color bits
|
|
PRUint8 mBlueCount; //number of blue color bits
|
|
PRUint8 mAlphaCount; //number of alpha data bits
|
|
PRUint8 mRedShift; //number to shift value into red position
|
|
PRUint8 mGreenShift; //number to shift value into green position
|
|
PRUint8 mBlueShift; //number to shift value into blue position
|
|
PRUint8 mAlphaShift; //number to shift value into alpha position
|
|
} nsPixelFormat;
|
|
|
|
#define RASWIDTH(width, bpp) ((((width) * (bpp) + 31) >> 5) << 2)
|
|
|
|
#define NS_IDRAWING_SURFACE_IID \
|
|
{ 0x61cc77e0, 0xcaac, 0x11d2, \
|
|
{ 0xa8, 0x49, 0x00, 0x40, 0x95, 0x9a, 0x28, 0xc9 } }
|
|
|
|
class nsIDrawingSurface : public nsISupports
|
|
{
|
|
public:
|
|
NS_DEFINE_STATIC_IID_ACCESSOR(NS_IDRAWING_SURFACE_IID)
|
|
/**
|
|
* Lock a rect of a drawing surface and return a
|
|
* pointer to the upper left hand corner of the
|
|
* bitmap.
|
|
* @param aX x position of subrect of bitmap
|
|
* @param aY y position of subrect of bitmap
|
|
* @param aWidth width of subrect of bitmap
|
|
* @param aHeight height of subrect of bitmap
|
|
* @param aBits out parameter for upper left hand
|
|
* corner of bitmap
|
|
* @param aStride out parameter for number of bytes
|
|
* to add to aBits to go from scanline to scanline
|
|
* @param aWidthBytes out parameter for number of
|
|
* bytes per line in aBits to process aWidth pixels
|
|
* @return error status
|
|
*
|
|
**/
|
|
NS_IMETHOD Lock(PRInt32 aX, PRInt32 aY, PRUint32 aWidth, PRUint32 aHeight,
|
|
void **aBits, PRInt32 *aStride, PRInt32 *aWidthBytes,
|
|
PRUint32 aFlags) = 0;
|
|
|
|
/**
|
|
* Unlock a rect of a drawing surface. must be preceded
|
|
* by a call to Lock(). Lock()/Unlock() pairs do not nest.
|
|
* @return error status
|
|
*
|
|
**/
|
|
NS_IMETHOD Unlock(void) = 0;
|
|
|
|
/**
|
|
* Get the dimensions of a drawing surface
|
|
* @param aWidth out parameter for width of drawing surface
|
|
* @param aHeight out parameter for height of drawing surface
|
|
* @return error status
|
|
*
|
|
**/
|
|
NS_IMETHOD GetDimensions(PRUint32 *aWidth, PRUint32 *aHeight) = 0;
|
|
|
|
/**
|
|
* Get the offscreen status of the drawing surface
|
|
* @param aOffscreen out parameter for offscreen status of
|
|
* drawing surface. if PR_TRUE, then modifying the
|
|
* drawing surface does not immediately reflect the
|
|
* changes on the output device
|
|
* @return error status
|
|
*
|
|
**/
|
|
NS_IMETHOD IsOffscreen(PRBool *aOffScreen) = 0;
|
|
|
|
/**
|
|
* Get the pixel addressability status of the drawing surface
|
|
* @param aAddressable out parameter for pixel addressability
|
|
* status of drawing surface. if PR_TRUE, then the
|
|
* drawing surface is optimized for pixel addressability
|
|
* (i.e. the Lock() method has very low overhead). All
|
|
* drawing surfaces support Lock()ing, but doing so on
|
|
* drawing surfaces that do not return PR_TRUE here may
|
|
* impose significant overhead.
|
|
* @return error status
|
|
*
|
|
**/
|
|
NS_IMETHOD IsPixelAddressable(PRBool *aAddressable) = 0;
|
|
|
|
/**
|
|
* Get the pixel format of a drawing surface
|
|
* @param aOffscreen out parameter filled in with pixel
|
|
* format information.
|
|
* @return error status
|
|
*
|
|
**/
|
|
NS_IMETHOD GetPixelFormat(nsPixelFormat *aFormat) = 0;
|
|
};
|
|
|
|
//when creating a drawing surface, you can use this
|
|
//to tell the drawing surface that you anticipate
|
|
//the need to get to the actual bits of the drawing
|
|
//surface at some point during it's lifetime. typically
|
|
//used when creating bitmaps to be operated on by the
|
|
//nsIBlender implementations.
|
|
#define NS_CREATEDRAWINGSURFACE_FOR_PIXEL_ACCESS 0x0001
|
|
|
|
//flag to say that this drawing surface is shortlived,
|
|
//which may affect how the OS allocates it. Used for
|
|
//tiling, grouting etc.
|
|
#define NS_CREATEDRAWINGSURFACE_SHORTLIVED 0x0002
|
|
|
|
//when locking a drawing surface, use these flags to
|
|
//control how the data in the surface should be accessed
|
|
#define NS_LOCK_SURFACE_READ_ONLY 0x0001
|
|
#define NS_LOCK_SURFACE_WRITE_ONLY 0x0002
|
|
|
|
#endif // nsIDrawingSurface_h___
|