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