0N/A/*
2362N/A * Copyright (c) 1996, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/A/*
0N/A * This file contains macro definitions for the Decoding category of
0N/A * the macros used by the generic scaleloop function.
0N/A *
0N/A * This implementation can decode the pixel information associated
0N/A * with Java DirectColorModel objects where the color masks are
0N/A * guaranteed to be at least 8-bits wide each. It is slightly more
0N/A * efficient then the generic DCM parsing code since it does not need
0N/A * to store or test component scaling values. This implementation
0N/A * examines some of the private fields of the DirectColorModel
0N/A * object and decodes the red, green, blue, and possibly alpha values
0N/A * directly rather than calling the getRGB method on the Java object.
0N/A */
0N/A
0N/A/*
0N/A * These definitions vector the standard macro names to the "DCM8"
0N/A * versions of those macros only if the "DecodeDeclared" keyword has
0N/A * not yet been defined elsewhere. The "DecodeDeclared" keyword is
0N/A * also defined here to claim ownership of the primary implementation
0N/A * even though this file does not rely on the definitions in any other
0N/A * files.
0N/A */
0N/A#ifndef DecodeDeclared
0N/A#define DeclareDecodeVars DeclareDCM8Vars
0N/A#define InitPixelDecode(CM) InitPixelDCM8(unhand(CM))
0N/A#define PixelDecode PixelDCM8Decode
0N/A#define DecodeDeclared
0N/A#endif
0N/A
0N/A#include "java_awt_image_DirectColorModel.h"
0N/A
0N/A#define DeclareDCM8Vars \
0N/A IfAlpha(unsigned int alpha_off;) \
0N/A unsigned int red_off, green_off, blue_off;
0N/A
0N/A#define InitPixelDCM8(CM) \
0N/A do { \
0N/A Classjava_awt_image_DirectColorModel *dcm = \
0N/A (Classjava_awt_image_DirectColorModel *) CM; \
0N/A red_off = dcm->red_offset; \
0N/A green_off = dcm->green_offset; \
0N/A blue_off = dcm->blue_offset; \
0N/A IfAlpha(alpha_off = (dcm->alpha_mask == 0 \
0N/A ? -1 \
0N/A : dcm->alpha_offset);) \
0N/A } while (0)
0N/A
0N/A#define PixelDCM8Decode(CM, pixel, red, green, blue, alpha) \
0N/A do { \
0N/A IfAlpha(alpha = ((alpha_off < 0) \
0N/A ? 255 \
0N/A : (pixel >> alpha_off) & 0xff);) \
0N/A red = (pixel >> red_off) & 0xff; \
0N/A green = (pixel >> green_off) & 0xff; \
0N/A blue = (pixel >> blue_off) & 0xff; \
0N/A } while (0)