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/types.h"
30 #include "src/lib/bitmap.h"
31 #include "src/lib/planar.h"
32 #include "src/lib/16_head.h"
33 #include "src/lib/16text.h"
34 #include "src/lib/modex16/320x240.h"
35 #include "src/lib/modex16/320x200.h"
36 #include "src/lib/modex16/256x192.h"
37 #include "src/lib/modex16/192x144_.h"
38 #include "src/lib/modex16/160x120.h"
45 #define QUADWH TILEWH/2
47 /* -========================== Types & Macros ==========================- */
48 #define PAGE_OFFSET(x,y) (((y)<<6)+((y)<<4)+((x)>>2))
49 #define PLANE(x) (1<< (x&3))
50 #define SELECT_ALL_PLANES() outpw(0x03c4, 0xff02)
59 /* -============================ Functions =============================- */
60 /* mode switching, page, and plane functions */
61 void VGAmodeX(sword vq, global_game_variables_t *gv);
62 void modexEnter(sword vq, global_game_variables_t *gv);
65 void modexsetBaseXMode(page_t *page);
66 page_t modexDefaultPage(page_t *p);
67 page_t modexNextPage(page_t *p);
68 page_t modexNextPageFlexibleSize(page_t *p, word x, word y);
69 void modexShowPage(page_t *page);
70 void modexPanPage(page_t *page, int dx, int dy);
71 void modexSelectPlane(byte plane);
72 void modexClearRegion(page_t *page, int x, int y, int w, int h, byte color);
73 void DrawPBuf(page_t *page, int x, int y, planar_buf_t *p, byte sprite);
74 void oldDrawBmp(byte far* page, int x, int y, bitmap_t *bmp, byte sprite);
75 //void CDrawBmp(byte far* vgamem, page_t* page, int x, int y, bitmap_t *bmp, byte sprite);
76 void modexDrawBmp(page_t *page, int x, int y, bitmap_t *bmp);
77 void modexDrawBmpRegion(page_t *page, int x, int y, int rx, int ry, int rw, int rh, bitmap_t *bmp);
78 void modexDrawPlanarBuf(page_t *page, int x, int y, planar_buf_t *bmp);
79 void modexDrawSprite(page_t *page, int x, int y, bitmap_t *bmp);
80 void modexDrawSpriteRegion(page_t *page, int x, int y, int rx, int ry, int rw, int rh, bitmap_t *bmp);
81 void modexCopyPageRegion(page_t *dest, page_t *src, word sx, word sy, word dx, word dy, word width, word height);
83 /* Palette fade and flash effects */
84 void modexFadeOn(word fade, byte *palette);
85 void modexFadeOff(word fade, byte *palette);
86 void modexFlashOn(word fade, byte *palette);
87 void modexFlashOff(word fade, byte *palette);
89 /* palette loading and saving */
90 void modexPalSave(byte *palette);
92 void modexLoadPalFile(char *filename, byte **palette);
93 void modexSavePalFile(char *filename, byte *palette);
95 /* fixed palette functions */
99 /* utility functions */
100 void modexPalUpdate(bitmap_t *bmp, word *i, word qp, word aqoffset);
101 void modexPalUpdate1(byte *p);
102 void modexPalUpdate0(byte *p);
103 void modexPalOverscan(byte *p, word col);
104 void chkcolor(bitmap_t *bmp, word *q, word *a, word *aa, word *z, word *i/*, word *offset*/);
105 void modexputPixel(page_t *page, int x, int y, byte color);
106 byte modexgetPixel(page_t *page, int x, int y);
107 void modexhlin(page_t *page, word xl, word xh, word y, word color);
108 void modexprint(page_t *page, word x, word y, word t, word col, word bgcol, const byte *str);
109 void modexprintbig(page_t *page, word x, word y, word t, word col, word bgcol, const byte *str);
110 void pdump(page_t *pee);
111 void cls(page_t *page, byte color, byte *Where);
112 void modexWaitBorder();
114 /* -======================= Constants & Vars ==========================- */
115 extern byte far* VGA; /* The VGA Memory */
116 //extern int old_mode;
117 #define SCREEN_SEG 0xa000
118 #define VIDEO_INT 0x10
119 #define SET_MODE 0x00
120 #define VGA_256_COLOR_MODE 0x13
121 #define TEXT_MODE 0x03
122 //#define SCREEN_WIDTH 320
123 //#define SCREEN_HEIGHT 240
124 //#define PAGE_SIZE (word)(SCREEN_WIDTH/4 * SCREEN_HEIGHT)
126 #define AC_INDEX 0x03c0
127 #define SC_INDEX 0x03c4
128 #define SC_DATA 0x03c5
129 #define CRTC_INDEX 0x03d4
130 #define CRTC_DATA 0x03d5
131 #define GC_INDEX 0x03ce
132 #define MISC_OUTPUT 0x03c2
133 #define HIGH_ADDRESS 0x0C
134 #define LOW_ADDRESS 0x0D
135 #define VRETRACE 0x08
136 #define INPUT_STATUS_1 0x03da
137 #define DISPLAY_ENABLE 0x01
138 #define MAP_MASK 0x02
139 #define PAL_READ_REG 0x03C7 /* Color register, read address */
140 #define PAL_WRITE_REG 0x03C8 /* Color register, write address */
141 #define PAL_DATA_REG 0x03C9 /* Color register, data port */
142 #define PAL_SIZE (256 * 3)