1 /* Project 16 Source Code~
2 * Copyright (C) 2012-2016 sparky4 & pngwen & andrius4669 & joncampbell123 & yakui-lover
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.
28 #include "src/lib/16_head.h"
29 #include "src/lib/bitmap.h"
30 //#include "src/lib/planar.h"
31 //#include "src/lib/modex16/16planar.h"
32 #include "src/lib/16text.h"
33 #include "src/lib/16render.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"
41 #include <hw/cpu/cpu.h>
42 #include <hw/dos/dos.h>
43 #include <hw/vga/vga.h>
44 #include <hw/vga/vrl.h>
45 #include <hw/vga/vrs.h>
48 static struct pcxHeader {
73 #define TILEWHD TILEWH*2
74 #define QUADWH TILEWH/2
76 /* -========================== Types & Macros ==========================- */
77 #define PAGE_OFFSET(x,y) (((y)<<6)+((y)<<4)+((x)>>2))
78 #define PLANE(x) (1 << ((x) & 3))
79 #define SELECT_ALL_PLANES() outpw(0x03c4, 0xff02)
89 /* -======================= Constants & Vars ==========================- */
90 extern byte far* VGA; /* The VGA Memory */
91 #define SCREEN_SEG 0xa000
92 #define VIDEO_INT 0x10
94 #define VGA_256_COLOR_MODE 0x13
95 #define TEXT_MODE 0x03
97 #define AC_INDEX 0x03c0
98 #define SC_INDEX 0x03c4
99 #define SC_DATA 0x03c5
100 #define CRTC_INDEX 0x03d4
101 #define CRTC_DATA 0x03d5
102 #define GC_INDEX 0x03ce
103 #define MISC_OUTPUT 0x03c2
104 #define HIGH_ADDRESS 0x0C
105 #define LOW_ADDRESS 0x0D
106 #define VRETRACE 0x08
107 //#define INPUT_STATUS_1 0x03da defined in 16_head
108 #define DISPLAY_ENABLE 0x01
109 #define MAP_MASK 0x02
110 #define PAL_READ_REG 0x03C7 /* Color register, read address */
111 #define PAL_WRITE_REG 0x03C8 /* Color register, write address */
112 #define PAL_DATA_REG 0x03C9 /* Color register, data port */
113 #define PAL_SIZE (256 * 3)
115 /* -============================ Functions =============================- */
116 /* mode switching, page, and plane functions */
117 void VGAmodeX(sword vq, boolean cmem, global_game_variables_t *gv);
118 void modexEnter(sword vq, boolean cmem, global_game_variables_t *gv);
121 void modexsetBaseXMode();
122 page_t modexDefaultPage(page_t *p);
123 page_t modexNextPage(page_t *p);
124 page_t modexNextPageFlexibleSize(page_t *p, word x, word y);
125 void modexCalcVmemRemain(video_t *video);
126 void modexHiganbanaPageSetup(video_t *video);
127 void modexShowPage(page_t *page);
128 void modexPanPage(page_t *page, int dx, int dy);
129 void modexSelectPlane(byte plane);
130 void modexClearRegion(page_t *page, int x, int y, int w, int h, byte color);
131 /* moved to src/lib/modex16/16render.c */
132 void modexCopyPageRegion(page_t *dest, page_t *src, word sx, word sy, word dx, word dy, word width, word height);
134 /* Palette fade and flash effects */
135 void modexFadeOn(word fade, byte *palette);
136 void modexFadeOff(word fade, byte *palette);
137 void modexFlashOn(word fade, byte *palette);
138 void modexFlashOff(word fade, byte *palette);
140 /* palette loading and saving */
141 void modexPalSave(byte *palette);
143 void modexLoadPalFile(char *filename, byte **palette);
144 void modexSavePalFile(char *filename, byte *palette);
146 /* fixed palette functions */
147 void modexPalBlack();
148 void modexPalWhite();
150 /* utility functions */
151 void modexPalUpdate(bitmap_t *bmp, word *i, word qp, word aqoffset);
152 void modexPalUpdate1(byte *p);
153 void modexPalUpdate0(byte *p);
154 void modexPalOverscan(word col);
155 void modexchkcolor(bitmap_t *bmp, word *q, word *a, word *aa, word *z, word *i/*, word *offset*/);
156 void modexputPixel(page_t *page, int x, int y, byte color);
157 byte modexgetPixel(page_t *page, int x, int y);
159 #if 0 // not needed anymore. maybe good for reference purposes though.
160 static inline void modexwritepixel(page_t *page, int x, int y, word addr, byte color)
162 /* Each address accesses four neighboring pixels, so set
163 Write Plane Enable according to which pixel we want
164 to modify. The plane is determined by the two least
165 significant bits of the x-coordinate: */
166 modexSelectPlane(PLANE(x));
167 //outp(SC_INDEX, 0x02);
168 //outp(SC_DATA, 0x01 << (x & 3));
170 /* The offset of the pixel into the video segment is
171 offset = (width * y + x) / 4, and write the given
172 color to the plane we selected above. Heed the active
173 page start selection. */
174 vga_state.vga_graphics_ram[addr] = color;
176 static inline byte modexreadPixel(page_t *page, int x, int y, word addr)
178 /* Select the plane from which we must read the pixel color: */
179 outpw(GC_INDEX, 0x04);
180 outpw(GC_INDEX+1, x & 3);
181 return vga_state.vga_graphics_ram[addr];
185 void modexprint(page_t *page, word x, word y, word t, word col, word bgcol, const byte *str);
186 void modexprintbig(page_t *page, word x, word y, word t, word col, word bgcol, const byte *str);
187 void modexpdump(page_t *pee);
188 void modexcls(page_t *page, byte color, byte *Where);
189 void modexWaitBorder();
190 void modexprintmeminfo(video_t *v);