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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.
*
* $URL$
* $Id$
*
*/
/* Generic pic auxbuf filling code, to be included by sci_pic_0.c
*
*
* To use, define the following:
* AUXBUF_FILL: Name of the exported floodfill function
* AUXBUF_FILL_HELPER: Name of the helper function
*
* Define DRAW_SCALED to support scaled drawing, or leave it out for faster
* processing.
*
*/
namespace Sci {
#define CLIPMASK_HARD_BOUND 0x80 /* ensures that we don't re-fill filled stuff */
static void AUXBUF_FILL_HELPER(gfxr_pic_t *pic, int old_xl, int old_xr, int y, int dy,
int clipmask, int control, int sci_titlebar_size) {
int xl, xr;
int oldytotal = y * 320;
#ifdef DRAW_SCALED
unsigned const char fillmask = CLIPMASK_HARD_BOUND | 0x78;
#else
unsigned const char fillmask = CLIPMASK_HARD_BOUND | 0x84;
#endif
do {
int ytotal = oldytotal + (320 * dy);
int xcont;
int state;
y += dy;
if (y < sci_titlebar_size || y > 199)
return;
xl = old_xl;
if (!(pic->aux_map[ytotal + xl] & clipmask)) { // go left
while (xl && !(pic->aux_map[ytotal + xl - 1] & clipmask))
--xl;
} else // go right and look for the first valid spot
while ((xl <= old_xr) && (pic->aux_map[ytotal + xl] & clipmask))
++xl;
if (xl > old_xr) // No fillable strip above the last one
return;
if ((ytotal + xl) < 0) {
fprintf(stderr, "AARGH-%d\n", __LINE__);
BREAKPOINT();
}
xr = xl;
while (xr < 320 && !(pic->aux_map[ytotal + xr] & clipmask)) {
pic->aux_map[ytotal + xr] |= fillmask;
++xr;
}
if ((ytotal + xr) > 64000) {
fprintf(stderr, "AARGH-%d\n", __LINE__);
BREAKPOINT();
}
--xr;
if (xr < xl)
return;
// Check whether we need to recurse on branches in the same direction
if ((y > sci_titlebar_size && dy < 0) || (y < 199 && dy > 0)) {
state = 0;
xcont = xr + 1;
while (xcont <= old_xr) {
if (pic->aux_map[ytotal + xcont] & clipmask)
state = 0;
else if (!state) { // recurse
state = 1;
AUXBUF_FILL_HELPER(pic, xcont, old_xr, y - dy, dy, clipmask, control, sci_titlebar_size);
}
++xcont;
}
}
// Check whether we need to recurse on backward branches:
// left
if (xl < old_xl - 1) {
state = 0;
for (xcont = old_xl - 1; xcont >= xl; xcont--) {
if (pic->aux_map[oldytotal + xcont] & clipmask)
state = xcont;
else if (state) { // recurse
AUXBUF_FILL_HELPER(pic, xcont, state, y, -dy, clipmask, control, sci_titlebar_size);
state = 0;
}
}
}
// right
if (xr > old_xr + 1) {
state = 0;
for (xcont = old_xr + 1; xcont <= xr; xcont++) {
if (pic->aux_map[oldytotal + xcont] & clipmask)
state = xcont;
else if (state) { // recurse
AUXBUF_FILL_HELPER(pic, state, xcont, y, -dy, clipmask, control, sci_titlebar_size);
state = 0;
}
}
}
if ((ytotal + xl) < 0) {
fprintf(stderr, "AARGH-%d\n", __LINE__);
BREAKPOINT()
}
if ((ytotal + xr + 1) > 64000) {
fprintf(stderr, "AARGH-%d\n", __LINE__);
BREAKPOINT();
}
if (control)
memset(pic->control_map->index_data + ytotal + xl, control, xr - xl + 1);
oldytotal = ytotal;
old_xr = xr;
old_xl = xl;
} while (1);
}
static void AUXBUF_FILL(gfxr_pic_t *pic, int x, int y, int clipmask, int control, int sci_titlebar_size) {
// Fills the aux buffer and the control map (if control != 0)
int xl, xr;
int ytotal = y * 320;
#ifdef DRAW_SCALED
unsigned const char fillmask = 0x78;
#else
unsigned const char fillmask = 0x4;
#endif
#ifndef DRAW_SCALED
if (!control || !(clipmask & 4))
return; // Without pic scaling, we only do this to fill the control map
#endif
if (clipmask & 1)
clipmask = 1; // vis
else if (clipmask & 2)
clipmask = 2; // pri
else if (clipmask & 4)
clipmask = 4; // ctl
else return;
#ifdef DRAW_SCALED
clipmask |= fillmask; // Bits 3-5
#endif
if (pic->aux_map[ytotal + x] & clipmask)
return;
pic->aux_map[ytotal + x] |= fillmask;
xl = x;
while (xl && !(pic->aux_map[ytotal + xl - 1] & clipmask)) {
--xl;
pic->aux_map[ytotal + xl] |= fillmask;
}
xr = x;
while ((xr < 319) && !(pic->aux_map[ytotal + xr + 1] & clipmask)) {
++xr;
pic->aux_map[ytotal + xr] |= fillmask;
}
clipmask |= CLIPMASK_HARD_BOUND; // Guarantee clipping
if (control) // Draw the same strip on the control map
memset(pic->control_map->index_data + ytotal + xl, control, xr - xl + 1);
if (y > sci_titlebar_size)
AUXBUF_FILL_HELPER(pic, xl, xr, y, -1, clipmask, control, sci_titlebar_size);
if (y < 199)
AUXBUF_FILL_HELPER(pic, xl, xr, y, + 1, clipmask, control, sci_titlebar_size);
}
#undef CLIPMASK_HARD_BOUND
} // End of namespace Sci
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