1 /* Project 16 Source Code~
2 * Copyright (C) 2012-2015 sparky4 & pngwen & andrius4669
4 * This file is part of Project 16.
6 * Project 16 is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 3 of the License, or
9 * (at your option) any later version.
11 * Project 16 is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>, or
18 * write to the Free Software Foundation, Inc., 51 Franklin Street,
19 * Fifth Floor, Boston, MA 02110-1301 USA.
23 * Functions for handling modex and doing other basic graphics stuff.
29 #include "src/lib/16_head.h"
30 #include "src/lib/bitmap.h"
31 #include "src/lib/planar.h"
32 #include "src/lib/modex16/16planar.h"
33 #include "src/lib/16text.h"
34 #include "src/lib/modex16/16render.h"
35 #include "src/lib/modex16/320x240.h"
36 #include "src/lib/modex16/320x200.h"
37 #include "src/lib/modex16/256x192.h"
38 #include "src/lib/modex16/192x144_.h"
39 #include "src/lib/modex16/160x120.h"
41 static struct pcxHeader {
66 #define QUADWH TILEWH/2
68 /* -========================== Types & Macros ==========================- */
69 #define PAGE_OFFSET(x,y) (((y)<<6)+((y)<<4)+((x)>>2))
70 #define PLANE(x) (1<< (x&3))
71 #define SELECT_ALL_PLANES() outpw(0x03c4, 0xff02)
81 /* -============================ Functions =============================- */
82 /* mode switching, page, and plane functions */
83 void VGAmodeX(sword vq, global_game_variables_t *gv);
84 void modexEnter(sword vq, global_game_variables_t *gv);
87 void modexsetBaseXMode(page_t *page);
88 page_t modexDefaultPage(page_t *p);
89 page_t modexNextPage(page_t *p);
90 page_t modexNextPageFlexibleSize(page_t *p, word x, word y);
91 void modexShowPage(page_t *page);
92 void modexPanPage(page_t *page, int dx, int dy);
93 void modexSelectPlane(byte plane);
94 void modexClearRegion(page_t *page, int x, int y, int w, int h, byte color);
95 /* moved to src/lib/modex16/16render.c */
96 void modexCopyPageRegion(page_t *dest, page_t *src, word sx, word sy, word dx, word dy, word width, word height);
98 /* Palette fade and flash effects */
99 void modexFadeOn(word fade, byte *palette);
100 void modexFadeOff(word fade, byte *palette);
101 void modexFlashOn(word fade, byte *palette);
102 void modexFlashOff(word fade, byte *palette);
104 /* palette loading and saving */
105 void modexPalSave(byte *palette);
107 void modexLoadPalFile(char *filename, byte **palette);
108 void modexSavePalFile(char *filename, byte *palette);
110 /* fixed palette functions */
111 void modexPalBlack();
112 void modexPalWhite();
114 /* utility functions */
115 void modexPalUpdate(bitmap_t *bmp, word *i, word qp, word aqoffset);
116 void modexPalUpdate1(byte *p);
117 void modexPalUpdate0(byte *p);
118 void modexPalOverscan(byte *p, word col);
119 void chkcolor(bitmap_t *bmp, word *q, word *a, word *aa, word *z, word *i/*, word *offset*/);
120 void modexputPixel(page_t *page, int x, int y, byte color);
121 byte modexgetPixel(page_t *page, int x, int y);
122 void modexhlin(page_t *page, word xl, word xh, word y, word color);
123 void modexprint(page_t *page, word x, word y, word t, word col, word bgcol, const byte *str);
124 void modexprintbig(page_t *page, word x, word y, word t, word col, word bgcol, const byte *str);
125 void pdump(page_t *pee);
126 void cls(page_t *page, byte color, byte *Where);
127 void modexWaitBorder();
129 /* -======================= Constants & Vars ==========================- */
130 extern byte far* VGA; /* The VGA Memory */
131 //extern int old_mode;
132 #define SCREEN_SEG 0xa000
133 #define VIDEO_INT 0x10
134 #define SET_MODE 0x00
135 #define VGA_256_COLOR_MODE 0x13
136 #define TEXT_MODE 0x03
137 //#define SCREEN_WIDTH 320
138 //#define SCREEN_HEIGHT 240
139 //#define PAGE_SIZE (word)(SCREEN_WIDTH/4 * SCREEN_HEIGHT)
141 #define AC_INDEX 0x03c0
142 #define SC_INDEX 0x03c4
143 #define SC_DATA 0x03c5
144 #define CRTC_INDEX 0x03d4
145 #define CRTC_DATA 0x03d5
146 #define GC_INDEX 0x03ce
147 #define MISC_OUTPUT 0x03c2
148 #define HIGH_ADDRESS 0x0C
149 #define LOW_ADDRESS 0x0D
150 #define VRETRACE 0x08
151 #define INPUT_STATUS_1 0x03da
152 #define DISPLAY_ENABLE 0x01
153 #define MAP_MASK 0x02
154 #define PAL_READ_REG 0x03C7 /* Color register, read address */
155 #define PAL_WRITE_REG 0x03C8 /* Color register, write address */
156 #define PAL_DATA_REG 0x03C9 /* Color register, data port */
157 #define PAL_SIZE (256 * 3)