/* -*- 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" #include "gfxRect.h" #ifdef MOZ_CAIRO_GFX class gfxASurface; #endif 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 #ifndef MOZ_CAIRO_GFX // 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 #endif // IID for the nsIImage interface // ab6af421-9552-4d18-a3f4-a2bf9d2e44f7 #define NS_IIMAGE_IID \ { 0xab6af421, 0x9552, 0x4d18, \ { 0xa3, 0xf4, 0xa2, 0xbf, 0x9d, 0x2e, 0x44, 0xf7 } } // Interface to Images class nsIImage : public nsISupports { public: NS_DECLARE_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 and dest can be scaled * @param aSourceRect source rectangle, in image pixels * @param aDestRect destination rectangle, in device pixels */ NS_IMETHOD Draw(nsIRenderingContext &aContext, const gfxRect &aSourceRect, const gfxRect &aDestRect) = 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; #ifdef MOZ_CAIRO_GFX NS_IMETHOD GetSurface(gfxASurface **aSurface) = 0; #endif }; NS_DEFINE_STATIC_IID_ACCESSOR(nsIImage, NS_IIMAGE_IID) #endif