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"
35 /* -========================== Types & Macros ==========================- */
36 #define PAGE_OFFSET(x,y) (((y)<<6)+((y)<<4)+((x)>>2))
37 #define PLANE(x) (1<< (x&3))
38 #define SELECT_ALL_PLANES() outpw(0x03c4, 0xff02)
41 word id; /* the Identification number of the page~ For layering~ */
42 byte far* data; /* the data for the page */
43 word dx; /* col we are viewing on the virtual screen */
44 word dy; /* row we are viewing on the virtual screen */
45 word width; /* virtual width of the page */
46 word height; /* virtual height of the page */
56 /* -============================ Functions =============================- */
57 /* mode switching, page, and plane functions */
58 void VGAmodeX(sword vq, global_game_variables_t *gv);
61 page_t modexDefaultPage();
62 page_t modexNextPage(page_t *p);
63 page_t modexNextPage0(page_t *p, word x, word y);
64 void modexShowPage(page_t *page);
65 void modexPanPage(page_t *page, int dx, int dy);
66 void modexSelectPlane(byte plane);
67 void modexClearRegion(page_t *page, int x, int y, int w, int h, byte color);
68 void oldDrawBmp(byte far* page, int x, int y, bitmap_t *bmp, byte sprite);
69 void modexDrawBmp(page_t *page, int x, int y, bitmap_t *bmp);
70 void modexDrawBmpRegion(page_t *page, int x, int y, int rx, int ry, int rw, int rh, bitmap_t *bmp);
71 void modexDrawPlanarBuf(page_t *page, int x, int y, planar_buf_t *bmp);
72 void modexDrawSprite(page_t *page, int x, int y, bitmap_t *bmp);
73 void modexDrawSpriteRegion(page_t *page, int x, int y, int rx, int ry, int rw, int rh, bitmap_t *bmp);
74 void modexCopyPageRegion(page_t *dest, page_t *src, word sx, word sy, word dx, word dy, word width, word height);
76 /* Palette fade and flash effects */
77 void modexFadeOn(word fade, byte *palette);
78 void modexFadeOff(word fade, byte *palette);
79 void modexFlashOn(word fade, byte *palette);
80 void modexFlashOff(word fade, byte *palette);
82 /* palette loading and saving */
83 void modexPalSave(byte *palette);
85 void modexLoadPalFile(char *filename, byte **palette);
86 void modexSavePalFile(char *filename, byte *palette);
88 /* fixed palette functions */
92 /* utility functions */
93 void modexPalUpdate(bitmap_t *bmp, word *i, word qp, word aqoffset);
94 void modexPalUpdate1(byte *p);
95 void modexPalUpdate0(byte *p);
96 void chkcolor(bitmap_t *bmp, word *q, word *a, word *aa, word *z, word *i/*, word *offset*/);
97 void modexputPixel(page_t *page, int x, int y, byte color);
98 byte modexgetPixel(page_t *page, int x, int y);
99 void modexhlin(page_t *page, word xl, word xh, word y, word color);
100 void modexprint(page_t *page, word x, word y, word t, word col, word bgcol, const byte *str);
101 void modexprintbig(page_t *page, word x, word y, word t, word col, word bgcol, const byte *str);
102 void modexWaitBorder();
104 /* -======================= Constants & Vars ==========================- */
105 extern byte far* VGA; /* The VGA Memory */
107 #define SCREEN_SEG 0xa000
108 #define VIDEO_INT 0x10
109 #define SET_MODE 0x00
110 #define VGA_256_COLOR_MODE 0x13
111 #define TEXT_MODE 0x03
112 #define SCREEN_WIDTH 320
113 #define SCREEN_HEIGHT 240
114 #define PAGE_SIZE (word)(SCREEN_WIDTH/4 * SCREEN_HEIGHT)
116 #define AC_INDEX 0x03c0
117 #define SC_INDEX 0x03c4
118 #define SC_DATA 0x03c5
119 #define CRTC_INDEX 0x03d4
120 #define CRTC_DATA 0x03d5
121 #define GC_INDEX 0x03ce
122 #define MISC_OUTPUT 0x03c2
123 #define HIGH_ADDRESS 0x0C
124 #define LOW_ADDRESS 0x0D
125 #define VRETRACE 0x08
126 #define INPUT_STATUS_1 0x03da
127 #define DISPLAY_ENABLE 0x01
128 #define MAP_MASK 0x02
129 #define PAL_READ_REG 0x03C7 /* Color register, read address */
130 #define PAL_WRITE_REG 0x03C8 /* Color register, write address */
131 #define PAL_DATA_REG 0x03C9 /* Color register, data port */
132 #define PAL_SIZE (256 * 3)