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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program 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 for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
/* This file isn't used directly; rather, it's included by a different file. */
/* Note that memcpy() is assumed to be an inlineable built-in. If it isn't,
** performance will suck... badly.
*/
/* Config parameters:
** FUNCTION_NAME: Name of the blitter function
** USE_PRIORITY: Whether to care about the priority buffer
** BYTESPP: Bytes per pixel
*/
#include "common/scummsys.h"
/* set optimisations for Win32: */
/* g on: enable global optimizations */
/* t on: use fast code */
/* y on: suppress creation of frame pointers on stack */
/* s off: disable minimize size code */
#ifdef WIN32
# include <memory.h>
# ifndef SATISFY_PURIFY
# pragma optimize( "s", off )
# pragma optimize( "gty", on )
# pragma intrinsic( memcpy, memset )
# endif
#endif
namespace Sci {
static void FUNCTION_NAME(byte *dest, byte *src, int bytes_per_dest_line, int bytes_per_src_line,
int xl, int yl, byte *alpha, int bytes_per_alpha_line, int bytes_per_alpha_pixel,
unsigned int alpha_test_mask, unsigned int alpha_min
#ifdef USE_PRIORITY
, byte *priority_buffer, int bytes_per_priority_line, int bytes_per_priority_pixel, int priority
#endif /* USE_PRIORITY */
) {
int x, y;
int alpha_end = xl * bytes_per_alpha_pixel;
for (y = 0; y < yl; y++) {
int pixel_offset = 0;
int alpha_offset = 0;
#ifdef USE_PRIORITY
int priority_offset = 0;
#endif /* USE_PRIORITY */
for (x = 0; x < alpha_end; x += bytes_per_alpha_pixel) {
if ((alpha_test_mask & alpha[x])
#ifdef REVERSE_ALPHA
>=
#else
<
#endif
alpha_min)
#ifdef USE_PRIORITY
if (priority_buffer[priority_offset] <= priority) {
priority_buffer[priority_offset] = priority;
#endif /* USE_PRIORITY */
memcpy(dest + pixel_offset, src + pixel_offset, BYTESPP);
#ifdef USE_PRIORITY
}
#endif /* USE_PRIORITY */
pixel_offset += BYTESPP;
alpha_offset += bytes_per_alpha_pixel;
#ifdef USE_PRIORITY
priority_offset += bytes_per_priority_pixel;
#endif /* USE_PRIORITY */
}
dest += bytes_per_dest_line;
src += bytes_per_src_line;
alpha += bytes_per_alpha_line;
#ifdef USE_PRIORITY
priority_buffer += bytes_per_priority_line;
#endif /* USE_PRIORITY */
}
}
} // End of namespace Sci
/* reset to original optimisations for Win32: */
/* (does not reset intrinsics) */
#ifdef WIN32
# pragma optimize( "", on )
#endif
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