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Diffstat (limited to 'engines/sci/gfx/antialias.cpp')
| -rw-r--r-- | engines/sci/gfx/antialias.cpp | 163 |
1 files changed, 0 insertions, 163 deletions
diff --git a/engines/sci/gfx/antialias.cpp b/engines/sci/gfx/antialias.cpp deleted file mode 100644 index fac1aa3a5e..0000000000 --- a/engines/sci/gfx/antialias.cpp +++ /dev/null @@ -1,163 +0,0 @@ -/* 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. - * - * $URL$ - * $Id$ - * - */ - -/** Antialiasing code **/ - -#include "sci/gfx/gfx_system.h" -#include "sci/gfx/gfx_tools.h" - -namespace Sci { - -static void antialiase_simple(gfx_pixmap_t *pixmap, int mask[], int shift_const, gfx_mode_t *mode) { - int x, y, c; - int bytespp = mode->bytespp; - int line_size = bytespp * pixmap->xl; - char *lastline[2]; - char *lastline_p = NULL; - char *data_p = (char *)pixmap->data; - - lastline[0] = (char *)sci_malloc(line_size); - lastline[1] = (char *)sci_malloc(line_size); - - for (y = 0; y < pixmap->yl; y++) { - int visimode = (y > 0 && y + 1 < pixmap->yl) ? 1 : 0; - unsigned long last_pixel = 0; - - memcpy(lastline[y & 1], data_p, line_size); - lastline_p = lastline[(y & 1)^1]; - - for (x = 0; x < pixmap->xl; x++) { - unsigned long result = 0; - - if (x == 1) - visimode++; - else if (x + 1 == pixmap->xl) - visimode--; - - for (c = 0; c < 3; c++) { - unsigned long accum = 0; - unsigned long reader = 0; - int y_mode; - - /* Yes, bad compilers will read three times as often as neccessary. - ** This optimization is straightforward to detect (common subexpression - ** elemination), so I prefer to write the stuff semi-legibly... - */ - for (y_mode = 0; y_mode < 2; y_mode++) - if ((y_mode == 0 && y > 0) - || (y_mode == 1 && y + 1 < pixmap->yl)) { - - char *src = (y_mode) ? data_p + line_size : lastline_p; - - if (x > 0) { - memcpy(&reader, src - bytespp, bytespp); - accum += ((reader >> shift_const) & mask[c]) << 0; - } - - memcpy(&reader, src, bytespp); - accum += ((reader >> shift_const) & mask[c]) << 1; - - if (x + 1 < pixmap->xl) { - memcpy(&reader, src + bytespp, bytespp); - accum += ((reader >> shift_const) & mask[c]) << 0; - } - } - - if (x > 0) - accum += ((last_pixel >> shift_const) & mask[c]) << 1; - - memcpy(&reader, data_p, bytespp); - if (c == 2) - last_pixel = reader; - accum += ((reader >> shift_const) & mask[c]) << 2; - - if (x + 1 < pixmap->xl) { - memcpy(&reader, data_p + bytespp, bytespp); - accum += ((reader >> shift_const) & mask[c]) << 1; - } - - switch (visimode) { - - case 0: - accum /= 9; // Only happens twelve times - break; - - case 1: - accum = (accum >> 6) + (accum >> 4); // 15/16 intensity - break; - - case 2: - accum >>= 4; - break; - - default: - accum = (c == 0) ? 0xffffffff : 0; // Error: mark as red - } - - result |= (accum & mask[c]); - } - - result <<= shift_const; - memcpy(data_p, &result, bytespp); - - data_p += bytespp; - lastline_p += bytespp; - } - } - - free(lastline[0]); - free(lastline[1]); -} - -void gfxr_antialiase(gfx_pixmap_t *pixmap, gfx_mode_t *mode, gfxr_antialiasing_t type) { - int masks[3]; - int shift_const = 0; - -#ifdef SCUMM_BIG_ENDIAN - shift_const = (sizeof(unsigned long) - mode->bytespp) << 3; -#endif - - masks[0] = mode->red_mask; - masks[1] = mode->green_mask; - masks[2] = mode->blue_mask; - - if (mode->palette) - return; - - switch (type) { - - case GFXR_ANTIALIASING_NONE: - break; - - case GFXR_ANTIALIASING_SIMPLE: - antialiase_simple(pixmap, masks, shift_const, mode); - break; - - default: - GFXERROR("Invalid antialiasing mode %d (internal error)\n", type); - } -} - -} // End of namespace Sci |