зеркало из https://github.com/mozilla/gecko-dev.git
305 строки
9.6 KiB
C++
305 строки
9.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the 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 Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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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 "nsRect.h"
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#include "nsIRenderingContext.h"
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typedef struct
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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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} nsColorMap;
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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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// IID for the nsIImage interface
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#define NS_IIMAGE_IID \
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{ 0x0b4faaa0, 0xaa3a, 0x11d1, \
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{ 0xa8, 0x24, 0x00, 0x40, 0x95, 0x9a, 0x28, 0xc9 } }
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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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* Set/Get the decoded dimensions for the pixelmap
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* 01/11/2000 - pnunn
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*/
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NS_IMETHOD SetDecodedRect(PRInt32, PRInt32, PRInt32, PRInt32) = 0;
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virtual PRInt32 GetDecodedX1() = 0;
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virtual PRInt32 GetDecodedY1() = 0;
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virtual PRInt32 GetDecodedX2() = 0;
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virtual PRInt32 GetDecodedY2() = 0;
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NS_IMETHOD SetNaturalWidth(PRInt32) = 0;
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NS_IMETHOD SetNaturalHeight(PRInt32) = 0;
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virtual PRInt32 GetNaturalWidth() = 0;
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virtual PRInt32 GetNaturalHeight() = 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 width of the alpha mask
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* @update - dwc 2/1/99
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* @return The width in pixels
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*/
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virtual PRInt32 GetAlphaWidth() = 0;
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/**
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* Get the height of the alpha mask
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* @update - dwc 2/1/99
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* @return The width in pixels
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*/
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virtual PRInt32 GetAlphaHeight() = 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, nsRect *aUpdateRect) = 0;
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/**
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* Returns if the pixelmap has been converted to an optimized pixelmap
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* @update - dwc 2/1/99
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* @return If true, it is optimized
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*/
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virtual PRBool IsOptimized() = 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, nsDrawingSurface 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, nsDrawingSurface aSurface, 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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#ifdef USE_IMG2
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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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#endif
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/**
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* Set the alpha level for the image
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* @update - dwc 2/1/99
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* @param the alpha level to set for the image, from 0 to 100%
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*/
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virtual void SetAlphaLevel(PRInt32 aAlphaLevel) = 0;
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/**
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* Get the alpha level for the image
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* @update - dwc 2/1/99
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* @return the alpha level for the image, from 0 to 100%
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*/
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virtual PRInt32 GetAlphaLevel() = 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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//get the color space metrics for this image
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//virtual NI_ColorSpec * GetColorSpec() = 0; fix
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//get the color which should be considered transparent.
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//if this image is color mapped, this value will be an
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//index into the color map. hokey? yes, but it avoids
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//another silly api or struct.
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//virtual nscolor GetTransparentColor() = 0; fix.
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};
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//change notification API flag bits
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#define NS_IMAGE_UPDATE_COLORMAP 1
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#define NS_IMAGE_UPDATE_PIXELS 2
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#define NS_IMAGE_UPDATE_ALPHA 4
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#endif
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