| /* |
| * Copyright (c) 1996, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * This file contains macro definitions for the Decoding category of |
| * the macros used by the generic scaleloop function. |
| * |
| * This implementation can decode the pixel information associated |
| * with any Java IndexColorModel object. This implementation examines |
| * some of the private fields of the IndexColorModel object and decodes |
| * the red, green, blue, and possibly alpha values directly rather than |
| * calling the getRGB method on the Java object. |
| */ |
| |
| /* |
| * These definitions vector the standard macro names to the "ICM" |
| * versions of those macros only if the "DecodeDeclared" keyword has |
| * not yet been defined elsewhere. The "DecodeDeclared" keyword is |
| * also defined here to claim ownership of the primary implementation |
| * even though this file does not rely on the definitions in any other |
| * files. |
| */ |
| #ifndef DecodeDeclared |
| #define DeclareDecodeVars DeclareICMVars |
| #define InitPixelDecode(CM) InitPixelICM(unhand(CM)) |
| #define PixelDecode PixelICMDecode |
| #define DecodeDeclared |
| #endif |
| |
| #include "java_awt_image_IndexColorModel.h" |
| |
| #define DeclareICMVars \ |
| unsigned int mapsize; \ |
| unsigned int *cmrgb; |
| |
| #define InitPixelICM(CM) \ |
| do { \ |
| Classjava_awt_image_IndexColorModel *icm = \ |
| (Classjava_awt_image_IndexColorModel *) CM; \ |
| cmrgb = (unsigned int *) unhand(icm->rgb); \ |
| mapsize = obj_length(icm->rgb); \ |
| } while (0) |
| |
| #define PixelICMDecode(CM, pixel, red, green, blue, alpha) \ |
| do { \ |
| VerifyPixelRange(pixel, mapsize); \ |
| pixel = cmrgb[pixel]; \ |
| IfAlpha(alpha = (pixel >> ALPHASHIFT) & 0xff;) \ |
| red = (pixel >> REDSHIFT) & 0xff; \ |
| green = (pixel >> GREENSHIFT) & 0xff; \ |
| blue = (pixel >> BLUESHIFT) & 0xff; \ |
| } while (0) |
