| /* |
| * 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 Java DirectColorModel objects where the color masks are |
| * guaranteed to be at least 8-bits wide each. It is slightly more |
| * efficient then the generic DCM parsing code since it does not need |
| * to store or test component scaling values. This implementation |
| * examines some of the private fields of the DirectColorModel |
| * 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 "DCM8" |
| * 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 DeclareDCM8Vars |
| #define InitPixelDecode(CM) InitPixelDCM8(unhand(CM)) |
| #define PixelDecode PixelDCM8Decode |
| #define DecodeDeclared |
| #endif |
| |
| #include "java_awt_image_DirectColorModel.h" |
| |
| #define DeclareDCM8Vars \ |
| IfAlpha(unsigned int alpha_off;) \ |
| unsigned int red_off, green_off, blue_off; |
| |
| #define InitPixelDCM8(CM) \ |
| do { \ |
| Classjava_awt_image_DirectColorModel *dcm = \ |
| (Classjava_awt_image_DirectColorModel *) CM; \ |
| red_off = dcm->red_offset; \ |
| green_off = dcm->green_offset; \ |
| blue_off = dcm->blue_offset; \ |
| IfAlpha(alpha_off = (dcm->alpha_mask == 0 \ |
| ? -1 \ |
| : dcm->alpha_offset);) \ |
| } while (0) |
| |
| #define PixelDCM8Decode(CM, pixel, red, green, blue, alpha) \ |
| do { \ |
| IfAlpha(alpha = ((alpha_off < 0) \ |
| ? 255 \ |
| : (pixel >> alpha_off) & 0xff);) \ |
| red = (pixel >> red_off) & 0xff; \ |
| green = (pixel >> green_off) & 0xff; \ |
| blue = (pixel >> blue_off) & 0xff; \ |
| } while (0) |
