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- /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla 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/MPL/
- *
- * 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 of 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 MPL, 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 MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
-
- #ifndef nsIImage_h___
- #define nsIImage_h___
-
- #include "nsISupports.h"
- #include "nsIRenderingContext.h"
- #include "nsRect.h"
-
- class nsIDeviceContext;
-
- struct nsColorMap
- {
- //I lifted this from the image lib. The difference is that
- //this uses nscolor instead of NI_RGB. Multiple color pollution
- //is a bad thing. MMP
- PRInt32 NumColors; // Number of colors in the colormap.
- // A negative value can be used to denote a
- // possibly non-unique set.
- //nscolor *Map; // Colormap colors.
- PRUint8 *Index; // NULL, if map is in index order, otherwise
- // specifies the indices of the map entries. */
- };
-
- typedef enum {
- nsMaskRequirements_kNoMask,
- nsMaskRequirements_kNeeds1Bit,
- nsMaskRequirements_kNeeds8Bit
- } nsMaskRequirements;
-
-
- #define nsImageUpdateFlags_kColorMapChanged 0x1
- #define nsImageUpdateFlags_kBitsChanged 0x2
-
- // The following platforms store image data rows bottom-up.
- #if defined(XP_WIN) || defined(XP_OS2) || defined(XP_MACOSX)
- #define MOZ_PLATFORM_IMAGES_BOTTOM_TO_TOP
- #endif
-
- // IID for the nsIImage interface
- #define NS_IIMAGE_IID \
- { 0xce91c93f, 0x532d, 0x470d, \
- { 0xbf, 0xa3, 0xc9, 0x6e, 0x56, 0x01, 0x52, 0xa4 } }
-
- // Interface to Images
- class nsIImage : public nsISupports
- {
-
- public:
- NS_DEFINE_STATIC_IID_ACCESSOR(NS_IIMAGE_IID)
-
- /**
- * Build and initialize the nsIImage
- * @param aWidth The width in pixels of the desired pixelmap
- * @param aHeight The height in pixels of the desired pixelmap
- * @param aDepth The number of bits per pixel for the pixelmap
- * @param aMaskRequirements A flag indicating if a alpha mask should be allocated
- */
- virtual nsresult Init(PRInt32 aWidth, PRInt32 aHeight, PRInt32 aDepth, nsMaskRequirements aMaskRequirements) = 0;
-
- /**
- * Get the number of bytes per pixel for this image
- * @update - dwc 2/3/99
- * @return - the number of bytes per pixel
- */
- virtual PRInt32 GetBytesPix() = 0;
-
- /**
- * Get whether rows are organized top to bottom, or bottom to top
- * @update - syd 3/29/99
- * @return PR_TRUE if top to bottom, else PR_FALSE
- */
- virtual PRBool GetIsRowOrderTopToBottom() = 0;
-
- /**
- * Get the width for the pixelmap
- * @update - dwc 2/1/99
- * @return The width in pixels for the pixelmap
- */
- virtual PRInt32 GetWidth() = 0;
-
- /**
- * Get the height for the pixelmap
- * @update - dwc 2/1/99
- * @return The height in pixels for the pixelmap
- */
- virtual PRInt32 GetHeight() = 0;
-
- /**
- * Get a pointer to the bits for the pixelmap, only if it is not optimized
- * @update - dwc 2/1/99
- * @return address of the DIB pixel array
- */
- virtual PRUint8 * GetBits() = 0;
-
- /**
- * Get the number of bytes needed to get to the next scanline for the pixelmap
- * @update - dwc 2/1/99
- * @return The number of bytes in each scanline
- */
- virtual PRInt32 GetLineStride() = 0;
-
- /**
- * Get whether this image has an alpha mask. Preferable to testing
- * if GetAlphaBits() is non-null.
- * @update - sfraser 10/19/99
- * @return PR_TRUE if the image has an alpha mask, PR_FALSE otherwise
- */
- virtual PRBool GetHasAlphaMask() = 0;
-
- /**
- * Get a pointer to the bits for the alpha mask
- * @update - dwc 2/1/99
- * @return address of the alpha mask pixel array
- */
- virtual PRUint8 * GetAlphaBits() = 0;
-
- /**
- * Get the number of bytes per scanline for the alpha mask
- * @update - dwc 2/1/99
- * @return The number of bytes in each scanline
- */
- virtual PRInt32 GetAlphaLineStride() = 0;
-
- /**
- * Update the nsIImage color table
- * @update - dwc 2/1/99
- * @param aFlags Used to pass in parameters for the update
- * @param aUpdateRect The rectangle to update
- */
- virtual void ImageUpdated(nsIDeviceContext *aContext, PRUint8 aFlags, nsIntRect *aUpdateRect) = 0;
-
- /**
- * Get whether this image's region is completely filled with data.
- * @return PR_TRUE if image is complete, PR_FALSE if image is not yet
- * complete or broken
- */
- virtual PRBool GetIsImageComplete() = 0;
-
- /**
- * Converted this pixelmap to an optimized pixelmap for the device
- * @update - dwc 2/1/99
- * @param aContext The device to optimize for
- * @return the result of the operation, if NS_OK, then the pixelmap is optimized
- */
- virtual nsresult Optimize(nsIDeviceContext* aContext) = 0;
-
- /**
- * Get the colormap for the nsIImage
- * @update - dwc 2/1/99
- * @return if non null, the colormap for the pixelmap,otherwise the image is not color mapped
- */
- virtual nsColorMap * GetColorMap() = 0;
-
- /**
- * BitBlit the nsIImage to a device, the source can be scaled to the dest
- * @update - dwc 2/1/99
- * @param aSurface the surface to blit to
- * @param aX The destination horizontal location
- * @param aY The destination vertical location
- * @param aWidth The destination width of the pixelmap
- * @param aHeight The destination height of the pixelmap
- * @return if TRUE, no errors
- */
- NS_IMETHOD Draw(nsIRenderingContext &aContext, nsIDrawingSurface* aSurface, PRInt32 aX, PRInt32 aY, PRInt32 aWidth, PRInt32 aHeight) = 0;
-
- /**
- * BitBlit the nsIImage to a device, the source and dest can be scaled
- * @update - dwc 2/1/99
- * @param aSurface the surface to blit to
- * @param aSX The source width of the pixelmap
- * @param aSY The source vertical location
- * @param aSWidth The source width of the pixelmap
- * @param aSHeight The source height of the pixelmap
- * @param aDX The destination horizontal location
- * @param aDY The destination vertical location
- * @param aDWidth The destination width of the pixelmap
- * @param aDHeight The destination height of the pixelmap
- * @return if TRUE, no errors
- */
- NS_IMETHOD Draw(nsIRenderingContext &aContext, nsIDrawingSurface* aSurface,
- PRInt32 aSX, PRInt32 aSY, PRInt32 aSWidth, PRInt32 aSHeight,
- PRInt32 aDX, PRInt32 aDY, PRInt32 aDWidth, PRInt32 aDHeight) = 0;
-
-
- NS_IMETHOD DrawTile(nsIRenderingContext &aContext,
- nsIDrawingSurface* aSurface,
- PRInt32 aSXOffset, PRInt32 aSYOffset,
- PRInt32 aPadX, PRInt32 aPadY,
- const nsRect &aTileRect) = 0;
-
- /**
- * BitBlit the entire (no cropping) nsIImage to another nsImage, the source and dest can be scaled
- * @update - saari 03/08/01
- * @param aDstImage the nsImage to blit to
- * @param aDX The destination horizontal location
- * @param aDY The destination vertical location
- * @param aDWidth The destination width of the pixelmap
- * @param aDHeight The destination height of the pixelmap
- * @return if TRUE, no errors
- */
- NS_IMETHOD DrawToImage(nsIImage* aDstImage, PRInt32 aDX, PRInt32 aDY, PRInt32 aDWidth, PRInt32 aDHeight) = 0;
-
- /**
- * Get the alpha depth for the image mask
- * @update - lordpixel 2001/05/16
- * @return the alpha mask depth for the image, ie, 0, 1 or 8
- */
- virtual PRInt8 GetAlphaDepth() = 0;
-
- /**
- * Return information about the bits for this structure
- * @update - dwc 2/1/99
- * @return a bitmap info structure for the Device Dependent Bits
- */
- virtual void* GetBitInfo() = 0;
-
-
- /**
- * LockImagePixels
- * Lock the image pixels so that we can access them directly,
- * with safely. May be a noop on some platforms.
- *
- * aMaskPixels = PR_TRUE for the mask, PR_FALSE for the image
- *
- * Must be balanced by a call to UnlockImagePixels().
- *
- * @update - sfraser 10/18/99
- * @return error result
- */
- NS_IMETHOD LockImagePixels(PRBool aMaskPixels) = 0;
-
- /**
- * UnlockImagePixels
- * Unlock the image pixels. May be a noop on some platforms.
- *
- * Should balance an earlier call to LockImagePixels().
- *
- * aMaskPixels = PR_TRUE for the mask, PR_FALSE for the image
- *
- * @update - sfraser 10/18/99
- * @return error result
- */
- NS_IMETHOD UnlockImagePixels(PRBool aMaskPixels) = 0;
- };
-
- #endif
-