1 /* 2 * Copyright (c) 2006, 2009, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 #ifndef AWT_BITMAP_UTIL_H 27 #define AWT_BITMAP_UTIL_H 28 29 class BitmapUtil { 30 public: 31 /** 32 * Creates B&W Bitmap with transparency mask from specified ARGB input data 33 * 0 for opaque pixels, 1 for transparent. 34 * MSDN article for ICONINFO says that 'for color icons, this mask only 35 * defines the AND bitmask of the icon'. That's wrong! If mask bit for 36 * specific pixel is 0, the pixel is drawn opaque, otherwise it's XORed 37 * with background. 38 */ 39 static HBITMAP CreateTransparencyMaskFromARGB(int width, int height, int* imageData); 40 41 /** 42 * Creates 32-bit ARGB V4 Bitmap (Win95-compatible) from specified ARGB input data 43 * The color for transparent pixels (those with 0 alpha) is reset to 0 (BLACK) 44 * to prevent errors on systems prior to XP. 45 */ 46 static HBITMAP CreateV4BitmapFromARGB(int width, int height, int* imageData); 47 48 /** 49 * Creates 32-bit premultiplied ARGB V4 Bitmap (Win95-compatible) from 50 * specified ARGB Pre input data. 51 */ 52 static HBITMAP CreateBitmapFromARGBPre(int width, int height, 53 int srcStride, 54 int* imageData); 55 56 /** 57 * Transforms the given bitmap into an HRGN representing the transparency 58 * of the bitmap. 59 */ 60 static HRGN BitmapToRgn(HBITMAP hBitmap); 61 62 /** 63 * Makes a copy of the given bitmap. Blends every pixel of the source 64 * with the given blendColor and alpha. If alpha == 0, the function 65 * simply makes a plain copy of the source without any blending. 66 */ 67 static HBITMAP BlendCopy(HBITMAP hSrcBitmap, COLORREF blendColor, BYTE alpha); 68 69 /** 70 * Creates a 32 bit ARGB bitmap. Returns the bitmap handle. 71 * The pointer to the bitmap data is stored into bitmapBitsPtr. 72 */ 73 static HBITMAP CreateARGBBitmap(int width, int height, void ** bitmapBitsPtr); 74 }; 75 76 #endif 77