mirror of
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283 lines
9.5 KiB
C++
283 lines
9.5 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):
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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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#ifndef nsIImage_h___
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#define nsIImage_h___
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#include "nsISupports.h"
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#include "nsIRenderingContext.h"
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#include "nsRect.h"
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class nsIDeviceContext;
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struct nsColorMap
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{
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//I lifted this from the image lib. The difference is that
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//this uses nscolor instead of NI_RGB. Multiple color pollution
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//is a bad thing. MMP
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PRInt32 NumColors; // Number of colors in the colormap.
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// A negative value can be used to denote a
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// possibly non-unique set.
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//nscolor *Map; // Colormap colors.
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PRUint8 *Index; // NULL, if map is in index order, otherwise
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// specifies the indices of the map entries. */
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};
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typedef enum {
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nsMaskRequirements_kNoMask,
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nsMaskRequirements_kNeeds1Bit,
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nsMaskRequirements_kNeeds8Bit
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} nsMaskRequirements;
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#define nsImageUpdateFlags_kColorMapChanged 0x1
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#define nsImageUpdateFlags_kBitsChanged 0x2
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// The following platforms store image data rows bottom-up.
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#if defined(XP_WIN) || defined(XP_OS2) || defined(XP_MACOSX)
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#define MOZ_PLATFORM_IMAGES_BOTTOM_TO_TOP
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#endif
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// IID for the nsIImage interface
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#define NS_IIMAGE_IID \
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{ 0xce91c93f, 0x532d, 0x470d, \
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{ 0xbf, 0xa3, 0xc9, 0x6e, 0x56, 0x01, 0x52, 0xa4 } }
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// Interface to Images
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class nsIImage : public nsISupports
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{
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public:
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NS_DEFINE_STATIC_IID_ACCESSOR(NS_IIMAGE_IID)
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/**
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* Build and initialize the nsIImage
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* @param aWidth The width in pixels of the desired pixelmap
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* @param aHeight The height in pixels of the desired pixelmap
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* @param aDepth The number of bits per pixel for the pixelmap
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* @param aMaskRequirements A flag indicating if a alpha mask should be allocated
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*/
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virtual nsresult Init(PRInt32 aWidth, PRInt32 aHeight, PRInt32 aDepth, nsMaskRequirements aMaskRequirements) = 0;
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/**
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* Get the number of bytes per pixel for this image
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* @update - dwc 2/3/99
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* @return - the number of bytes per pixel
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*/
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virtual PRInt32 GetBytesPix() = 0;
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/**
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* Get whether rows are organized top to bottom, or bottom to top
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* @update - syd 3/29/99
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* @return PR_TRUE if top to bottom, else PR_FALSE
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*/
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virtual PRBool GetIsRowOrderTopToBottom() = 0;
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/**
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* Get the width for the pixelmap
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* @update - dwc 2/1/99
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* @return The width in pixels for the pixelmap
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*/
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virtual PRInt32 GetWidth() = 0;
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/**
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* Get the height for the pixelmap
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* @update - dwc 2/1/99
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* @return The height in pixels for the pixelmap
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*/
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virtual PRInt32 GetHeight() = 0;
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/**
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* Get a pointer to the bits for the pixelmap, only if it is not optimized
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* @update - dwc 2/1/99
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* @return address of the DIB pixel array
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*/
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virtual PRUint8 * GetBits() = 0;
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/**
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* Get the number of bytes needed to get to the next scanline for the pixelmap
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* @update - dwc 2/1/99
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* @return The number of bytes in each scanline
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*/
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virtual PRInt32 GetLineStride() = 0;
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/**
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* Get whether this image has an alpha mask. Preferable to testing
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* if GetAlphaBits() is non-null.
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* @update - sfraser 10/19/99
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* @return PR_TRUE if the image has an alpha mask, PR_FALSE otherwise
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*/
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virtual PRBool GetHasAlphaMask() = 0;
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/**
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* Get a pointer to the bits for the alpha mask
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* @update - dwc 2/1/99
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* @return address of the alpha mask pixel array
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*/
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virtual PRUint8 * GetAlphaBits() = 0;
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/**
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* Get the number of bytes per scanline for the alpha mask
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* @update - dwc 2/1/99
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* @return The number of bytes in each scanline
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*/
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virtual PRInt32 GetAlphaLineStride() = 0;
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/**
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* Update the nsIImage color table
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* @update - dwc 2/1/99
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* @param aFlags Used to pass in parameters for the update
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* @param aUpdateRect The rectangle to update
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*/
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virtual void ImageUpdated(nsIDeviceContext *aContext, PRUint8 aFlags, nsIntRect *aUpdateRect) = 0;
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/**
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* Get whether this image's region is completely filled with data.
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* @return PR_TRUE if image is complete, PR_FALSE if image is not yet
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* complete or broken
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*/
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virtual PRBool GetIsImageComplete() = 0;
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/**
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* Converted this pixelmap to an optimized pixelmap for the device
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* @update - dwc 2/1/99
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* @param aContext The device to optimize for
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* @return the result of the operation, if NS_OK, then the pixelmap is optimized
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*/
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virtual nsresult Optimize(nsIDeviceContext* aContext) = 0;
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/**
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* Get the colormap for the nsIImage
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* @update - dwc 2/1/99
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* @return if non null, the colormap for the pixelmap,otherwise the image is not color mapped
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*/
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virtual nsColorMap * GetColorMap() = 0;
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/**
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* BitBlit the nsIImage to a device, the source can be scaled to the dest
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* @update - dwc 2/1/99
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* @param aSurface the surface to blit to
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* @param aX The destination horizontal location
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* @param aY The destination vertical location
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* @param aWidth The destination width of the pixelmap
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* @param aHeight The destination height of the pixelmap
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* @return if TRUE, no errors
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*/
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NS_IMETHOD Draw(nsIRenderingContext &aContext, nsIDrawingSurface* aSurface, PRInt32 aX, PRInt32 aY, PRInt32 aWidth, PRInt32 aHeight) = 0;
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/**
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* BitBlit the nsIImage to a device, the source and dest can be scaled
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* @update - dwc 2/1/99
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* @param aSurface the surface to blit to
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* @param aSX The source width of the pixelmap
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* @param aSY The source vertical location
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* @param aSWidth The source width of the pixelmap
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* @param aSHeight The source height of the pixelmap
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* @param aDX The destination horizontal location
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* @param aDY The destination vertical location
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* @param aDWidth The destination width of the pixelmap
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* @param aDHeight The destination height of the pixelmap
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* @return if TRUE, no errors
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*/
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NS_IMETHOD Draw(nsIRenderingContext &aContext, nsIDrawingSurface* aSurface,
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PRInt32 aSX, PRInt32 aSY, PRInt32 aSWidth, PRInt32 aSHeight,
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PRInt32 aDX, PRInt32 aDY, PRInt32 aDWidth, PRInt32 aDHeight) = 0;
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NS_IMETHOD DrawTile(nsIRenderingContext &aContext,
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nsIDrawingSurface* aSurface,
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PRInt32 aSXOffset, PRInt32 aSYOffset,
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PRInt32 aPadX, PRInt32 aPadY,
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const nsRect &aTileRect) = 0;
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/**
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* BitBlit the entire (no cropping) nsIImage to another nsImage, the source and dest can be scaled
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* @update - saari 03/08/01
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* @param aDstImage the nsImage to blit to
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* @param aDX The destination horizontal location
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* @param aDY The destination vertical location
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* @param aDWidth The destination width of the pixelmap
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* @param aDHeight The destination height of the pixelmap
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* @return if TRUE, no errors
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*/
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NS_IMETHOD DrawToImage(nsIImage* aDstImage, PRInt32 aDX, PRInt32 aDY, PRInt32 aDWidth, PRInt32 aDHeight) = 0;
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/**
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* Get the alpha depth for the image mask
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* @update - lordpixel 2001/05/16
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* @return the alpha mask depth for the image, ie, 0, 1 or 8
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*/
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virtual PRInt8 GetAlphaDepth() = 0;
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/**
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* Return information about the bits for this structure
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* @update - dwc 2/1/99
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* @return a bitmap info structure for the Device Dependent Bits
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*/
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virtual void* GetBitInfo() = 0;
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/**
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* LockImagePixels
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* Lock the image pixels so that we can access them directly,
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* with safely. May be a noop on some platforms.
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*
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* aMaskPixels = PR_TRUE for the mask, PR_FALSE for the image
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*
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* Must be balanced by a call to UnlockImagePixels().
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*
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* @update - sfraser 10/18/99
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* @return error result
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*/
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NS_IMETHOD LockImagePixels(PRBool aMaskPixels) = 0;
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/**
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* UnlockImagePixels
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* Unlock the image pixels. May be a noop on some platforms.
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*
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* Should balance an earlier call to LockImagePixels().
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*
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* aMaskPixels = PR_TRUE for the mask, PR_FALSE for the image
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*
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* @update - sfraser 10/18/99
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* @return error result
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*/
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NS_IMETHOD UnlockImagePixels(PRBool aMaskPixels) = 0;
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};
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#endif
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