/* 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. * * $URL$ * $Id$ * */ /* Graphics support functions for drivers and replacements for driver functions ** for use with the graphical state manager */ #include "sci/include/gfx_system.h" #include "sci/include/gfx_tools.h" int gfx_crossblit_alpha_threshold = 128; #define DRAWLINE_FUNC _gfx_draw_line_buffer_1 #define PIXELWIDTH 1 #include "gfx_line.cpp" #undef PIXELWIDTH #undef DRAWLINE_FUNC #define DRAWLINE_FUNC _gfx_draw_line_buffer_2 #define PIXELWIDTH 2 #include "gfx_line.cpp" #undef PIXELWIDTH #undef DRAWLINE_FUNC #define DRAWLINE_FUNC _gfx_draw_line_buffer_3 #define PIXELWIDTH 3 #include "gfx_line.cpp" #undef PIXELWIDTH #undef DRAWLINE_FUNC #define DRAWLINE_FUNC _gfx_draw_line_buffer_4 #define PIXELWIDTH 4 #include "gfx_line.cpp" #undef PIXELWIDTH #undef DRAWLINE_FUNC inline void gfx_draw_line_buffer(byte *buffer, int linewidth, int pixelwidth, Common::Point start, Common::Point end, unsigned int color) { switch (pixelwidth) { case 1: _gfx_draw_line_buffer_1(buffer, linewidth, start, end, color); return; case 2: _gfx_draw_line_buffer_2(buffer, linewidth, start, end, color); return; case 3: _gfx_draw_line_buffer_3(buffer, linewidth, start, end, color); return; case 4: _gfx_draw_line_buffer_4(buffer, linewidth, start, end, color); return; default: GFXERROR("pixelwidth=%d not supported!\n", pixelwidth); return; } } void gfx_draw_line_pixmap_i(gfx_pixmap_t *pxm, Common::Point start, Common::Point end, int color) { gfx_draw_line_buffer(pxm->index_data, pxm->index_xl, 1, start, end, color); } void gfx_draw_box_buffer(byte *buffer, int linewidth, rect_t zone, int color) { byte *dest = buffer + zone.x + (linewidth * zone.y); int i; if (zone.xl <= 0 || zone.yl <= 0) return; for (i = 0; i < zone.yl; i++) { memset(dest, color, zone.xl); dest += linewidth; } } void gfx_draw_box_pixmap_i(gfx_pixmap_t *pxm, rect_t box, int color) { gfx_clip_box_basic(&box, pxm->index_xl - 1, pxm->index_yl - 1); gfx_draw_box_buffer(pxm->index_data, pxm->index_xl, box, color); } /* Import various crossblit functions */ #undef USE_PRIORITY #undef FUNCTION_NAME #undef BYTESPP # define FUNCTION_NAME _gfx_crossblit_8 # define BYTESPP 1 # include "gfx_crossblit.cpp" # undef FUNCTION_NAME # undef BYTESPP # define FUNCTION_NAME _gfx_crossblit_16 # define BYTESPP 2 # include "gfx_crossblit.cpp" # undef FUNCTION_NAME # undef BYTESPP # define FUNCTION_NAME _gfx_crossblit_24 # define BYTESPP 3 # include "gfx_crossblit.cpp" # undef FUNCTION_NAME # undef BYTESPP # define FUNCTION_NAME _gfx_crossblit_32 # define BYTESPP 4 # include "gfx_crossblit.cpp" #define USE_PRIORITY # undef FUNCTION_NAME # undef BYTESPP # define FUNCTION_NAME _gfx_crossblit_8_P # define BYTESPP 1 # include "gfx_crossblit.cpp" # undef FUNCTION_NAME # undef BYTESPP # define FUNCTION_NAME _gfx_crossblit_16_P # define BYTESPP 2 # include "gfx_crossblit.cpp" # undef FUNCTION_NAME # undef BYTESPP # define FUNCTION_NAME _gfx_crossblit_24_P # define BYTESPP 3 # include "gfx_crossblit.cpp" # undef FUNCTION_NAME # undef BYTESPP # define FUNCTION_NAME _gfx_crossblit_32_P # define BYTESPP 4 # include "gfx_crossblit.cpp" #undef USE_PRIORITY #undef FUNCTION_NAME #undef BYTESPP /* Reverse alpha versions */ #undef USE_PRIORITY #undef FUNCTION_NAME #undef BYTESPP #undef REVERSE_ALPHA #define REVERSE_ALPHA # define FUNCTION_NAME _gfx_crossblit_8_RA # define BYTESPP 1 # include "gfx_crossblit.cpp" # undef FUNCTION_NAME # undef BYTESPP # define FUNCTION_NAME _gfx_crossblit_16_RA # define BYTESPP 2 # include "gfx_crossblit.cpp" # undef FUNCTION_NAME # undef BYTESPP # define FUNCTION_NAME _gfx_crossblit_24_RA # define BYTESPP 3 # include "gfx_crossblit.cpp" # undef FUNCTION_NAME # undef BYTESPP # define FUNCTION_NAME _gfx_crossblit_32_RA # define BYTESPP 4 # include "gfx_crossblit.cpp" #define USE_PRIORITY # undef FUNCTION_NAME # undef BYTESPP # define FUNCTION_NAME _gfx_crossblit_8_P_RA # define BYTESPP 1 # include "gfx_crossblit.cpp" # undef FUNCTION_NAME # undef BYTESPP # define FUNCTION_NAME _gfx_crossblit_16_P_RA # define BYTESPP 2 # include "gfx_crossblit.cpp" # undef FUNCTION_NAME # undef BYTESPP # define FUNCTION_NAME _gfx_crossblit_24_P_RA # define BYTESPP 3 # include "gfx_crossblit.cpp" # undef FUNCTION_NAME # undef BYTESPP # define FUNCTION_NAME _gfx_crossblit_32_P_RA # define BYTESPP 4 # include "gfx_crossblit.cpp" #undef USE_PRIORITY #undef FUNCTION_NAME #undef BYTESPP #undef REVERSE_ALPHA static void (*crossblit_fns[5])(byte *, byte *, int, int, int, int, byte *, int, int, unsigned int, unsigned int) = { NULL, _gfx_crossblit_8, _gfx_crossblit_16, _gfx_crossblit_24, _gfx_crossblit_32 }; static void (*crossblit_fns_P[5])(byte *, byte *, int, int, int, int, byte *, int, int, unsigned int, unsigned int, byte *, int, int, int) = { NULL, _gfx_crossblit_8_P, _gfx_crossblit_16_P, _gfx_crossblit_24_P, _gfx_crossblit_32_P }; static void (*crossblit_fns_RA[5])(byte *, byte *, int, int, int, int, byte *, int, int, unsigned int, unsigned int) = { NULL, _gfx_crossblit_8_RA, _gfx_crossblit_16_RA, _gfx_crossblit_24_RA, _gfx_crossblit_32_RA }; static void (*crossblit_fns_P_RA[5])(byte *, byte *, int, int, int, int, byte *, int, int, unsigned int, unsigned int, byte *, int, int, int) = { NULL, _gfx_crossblit_8_P_RA, _gfx_crossblit_16_P_RA, _gfx_crossblit_24_P_RA, _gfx_crossblit_32_P_RA }; void _gfx_crossblit_simple(byte *dest, byte *src, int dest_line_width, int src_line_width, int xl, int yl, int bpp) { int line_width = xl * bpp; int i; for (i = 0; i < yl; i++) { memcpy(dest, src, line_width); dest += dest_line_width; src += src_line_width; } } int gfx_crossblit_pixmap(gfx_mode_t *mode, gfx_pixmap_t *pxm, int priority, rect_t src_coords, rect_t dest_coords, byte *dest, int dest_line_width, byte *priority_dest, int priority_line_width, int priority_skip, int flags) { int maxx = 320 * mode->xfact; int maxy = 200 * mode->yfact; byte *src = pxm->data; byte *alpha = pxm->alpha_map ? pxm->alpha_map : pxm->data; byte *priority_pos = priority_dest; unsigned int alpha_mask, alpha_min; int bpp = mode->bytespp; int bytes_per_alpha_pixel = pxm->alpha_map ? 1 : bpp; int bytes_per_alpha_line = bytes_per_alpha_pixel * pxm->xl; int xl = pxm->xl, yl = pxm->yl; int xoffset = (dest_coords.x < 0) ? - dest_coords.x : 0; int yoffset = (dest_coords.y < 0) ? - dest_coords.y : 0; int revalpha = mode->flags & GFX_MODE_FLAG_REVERSE_ALPHA; if (src_coords.x + src_coords.xl > xl) src_coords.xl = xl - src_coords.x; if (src_coords.y + src_coords.yl > yl) src_coords.yl = yl - src_coords.y; /** --???-- **/ if (src_coords.y > yl) return GFX_OK; if (src_coords.x > xl) return GFX_OK; /** --???-- **/ if (dest_coords.x + xl >= maxx) xl = maxx - dest_coords.x; if (dest_coords.y + yl >= maxy) yl = maxy - dest_coords.y; xl -= xoffset; yl -= yoffset; if (!pxm->data) return GFX_ERROR; if (xl <= 0 || yl <= 0) return GFX_OK; /* Set destination offsets */ /* Set x offsets */ if (!(flags & GFX_CROSSBLIT_FLAG_DATA_IS_HOMED)) dest += dest_coords.x * bpp; priority_pos += dest_coords.x * priority_skip; /* Set y offsets */ if (!(flags & GFX_CROSSBLIT_FLAG_DATA_IS_HOMED)) dest += dest_coords.y * dest_line_width; priority_pos += dest_coords.y * priority_line_width; /* Set source offsets */ if (xoffset += src_coords.x) { dest_coords.x = 0; src += xoffset * bpp; alpha += xoffset * bytes_per_alpha_pixel; } if (yoffset += src_coords.y) { dest_coords.y = 0; src += yoffset * bpp * pxm->xl; alpha += yoffset * bytes_per_alpha_line; } /* Adjust length for clip box */ if (xl > src_coords.xl) xl = src_coords.xl; if (yl > src_coords.yl) yl = src_coords.yl; /* now calculate alpha */ if (pxm->alpha_map) alpha_mask = 0xff; else { int shift_nr = 0; alpha_mask = mode->alpha_mask; if (!alpha_mask && pxm->alpha_map) { GFXERROR("Invalid alpha mode: both pxm->alpha_map and alpha_mask are white!\n"); return GFX_ERROR; } if (alpha_mask) { while (!(alpha_mask & 0xff)) { alpha_mask >>= 8; shift_nr++; } alpha_mask &= 0xff; } #ifdef WORDS_BIGENDIAN alpha += (mode->bytespp) - (shift_nr + 1); #else alpha += shift_nr; #endif } if (alpha_mask & 0xff) alpha_min = ((alpha_mask * gfx_crossblit_alpha_threshold) >> 8) & alpha_mask; else alpha_min = ((alpha_mask >> 8) * gfx_crossblit_alpha_threshold) & alpha_mask; if (revalpha) alpha_min = 255 - alpha_min; /* Since we use it for the reverse effect */ if (!alpha_mask) _gfx_crossblit_simple(dest, src, dest_line_width, pxm->xl * bpp, xl, yl, bpp); else if (priority == GFX_NO_PRIORITY) { if (bpp > 0 && bpp < 5) ((revalpha) ? crossblit_fns_RA : crossblit_fns)[bpp](dest, src, dest_line_width, pxm->xl * bpp, xl, yl, alpha, bytes_per_alpha_line, bytes_per_alpha_pixel, alpha_mask, alpha_min); else { GFXERROR("Invalid mode->bytespp: %d\n", mode->bytespp); return GFX_ERROR; } } else { /* priority */ if (bpp > 0 && bpp < 5) ((revalpha) ? crossblit_fns_P_RA : crossblit_fns_P)[bpp](dest, src, dest_line_width, pxm->xl * bpp, xl, yl, alpha, bytes_per_alpha_line, bytes_per_alpha_pixel, alpha_mask, alpha_min, priority_pos, priority_line_width, priority_skip, priority); else { GFXERROR("Invalid mode->bytespp: %d\n", mode->bytespp); return GFX_ERROR; } } return GFX_OK; }