/*
* Copyright (c) 1996, 2012, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* 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.
*
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*/
/*
* 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
#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 { \
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