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/modex16/256x192.h"
42 #define QUADWH TILEWH/2
44 /* -========================== Types & Macros ==========================- */
45 #define PAGE_OFFSET(x,y) (((y)<<6)+((y)<<4)+((x)>>2))
46 #define PLANE(x) (1<< (x&3))
47 #define SELECT_ALL_PLANES() outpw(0x03c4, 0xff02)
50 word id; /* the Identification number of the page~ For layering~ */
51 byte far* data; /* the data for the page */
52 word dx; /* col we are viewing on the virtual screen */
53 word dy; /* row we are viewing on the virtual screen */
54 word width; /* virtual width of the page */
55 word height; /* virtual height of the page */
67 /* -============================ Functions =============================- */
68 /* mode switching, page, and plane functions */
69 void VGAmodeX(sword vq, global_game_variables_t *gv);
70 void modex__320x240_256__Enter(global_game_variables_t *gv);
71 void modex__256x192_256__Enter(global_game_variables_t *gv);
73 void modexsetBaseXMode(void);
74 page_t modexDefaultPage();
75 page_t modexNextPage(page_t *p);
76 page_t modexNextPageFlexibleSize(page_t *p, word x, word y);
77 void modexShowPage(page_t *page);
78 void modexPanPage(page_t *page, int dx, int dy);
79 void modexSelectPlane(byte plane);
80 void modexClearRegion(page_t *page, int x, int y, int w, int h, byte color);
81 void oldDrawBmp(byte far* page, int x, int y, bitmap_t *bmp, byte sprite);
82 //void CDrawBmp(byte far* vgamem, page_t* page, int x, int y, bitmap_t *bmp, byte sprite);
83 void modexDrawBmp(page_t *page, int x, int y, bitmap_t *bmp);
84 void modexDrawBmpRegion(page_t *page, int x, int y, int rx, int ry, int rw, int rh, bitmap_t *bmp);
85 void modex_sparky4_DrawBmpRegion(page_t *page, int x, int y, int rx, int ry, int rw, int rh, bitmap_t *bmp);
86 void modexDrawPlanarBuf(page_t *page, int x, int y, planar_buf_t *bmp);
87 void modexDrawSprite(page_t *page, int x, int y, bitmap_t *bmp);
88 void modexDrawSpriteRegion(page_t *page, int x, int y, int rx, int ry, int rw, int rh, bitmap_t *bmp);
89 void modexCopyPageRegion(page_t *dest, page_t *src, word sx, word sy, word dx, word dy, word width, word height);
91 /* Palette fade and flash effects */
92 void modexFadeOn(word fade, byte *palette);
93 void modexFadeOff(word fade, byte *palette);
94 void modexFlashOn(word fade, byte *palette);
95 void modexFlashOff(word fade, byte *palette);
97 /* palette loading and saving */
98 void modexPalSave(byte *palette);
100 void modexLoadPalFile(char *filename, byte **palette);
101 void modexSavePalFile(char *filename, byte *palette);
103 /* fixed palette functions */
104 void modexPalBlack();
105 void modexPalWhite();
107 /* utility functions */
108 void modexPalUpdate(bitmap_t *bmp, word *i, word qp, word aqoffset);
109 void modexPalUpdate1(byte *p);
110 void modexPalUpdate0(byte *p);
111 void chkcolor(bitmap_t *bmp, word *q, word *a, word *aa, word *z, word *i/*, word *offset*/);
112 void modexputPixel(page_t *page, int x, int y, byte color);
113 byte modexgetPixel(page_t *page, int x, int y);
114 void modexhlin(page_t *page, word xl, word xh, word y, word color);
115 void modexprint(page_t *page, word x, word y, word t, word col, word bgcol, const byte *str);
116 void modexprintbig(page_t *page, word x, word y, word t, word col, word bgcol, const byte *str);
117 void cls(page_t *page, byte color, byte *Where);
118 void modexWaitBorder();
120 /* -======================= Constants & Vars ==========================- */
121 extern byte far* VGA; /* The VGA Memory */
122 //extern int old_mode;
123 #define SCREEN_SEG 0xa000
124 #define VIDEO_INT 0x10
125 #define SET_MODE 0x00
126 #define VGA_256_COLOR_MODE 0x13
127 #define TEXT_MODE 0x03
128 #define SCREEN_WIDTH 320
129 #define SCREEN_HEIGHT 240
130 #define PAGE_SIZE (word)(SCREEN_WIDTH/4 * SCREEN_HEIGHT)
132 #define AC_INDEX 0x03c0
133 #define SC_INDEX 0x03c4
134 #define SC_DATA 0x03c5
135 #define CRTC_INDEX 0x03d4
136 #define CRTC_DATA 0x03d5
137 #define GC_INDEX 0x03ce
138 #define MISC_OUTPUT 0x03c2
139 #define HIGH_ADDRESS 0x0C
140 #define LOW_ADDRESS 0x0D
141 #define VRETRACE 0x08
142 #define INPUT_STATUS_1 0x03da
143 #define DISPLAY_ENABLE 0x01
144 #define MAP_MASK 0x02
145 #define PAL_READ_REG 0x03C7 /* Color register, read address */
146 #define PAL_WRITE_REG 0x03C8 /* Color register, write address */
147 #define PAL_DATA_REG 0x03C9 /* Color register, data port */
148 #define PAL_SIZE (256 * 3)