2 * Functions for handling modex and doing other basic graphics stuff.
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10 /* -========================== Types & Macros ==========================- */
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11 #define PAGE_OFFSET(x,y) (((y)<<6)+((y)<<4)+((x)>>2))
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12 #define PLANE(x) (1<< (x&3))
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13 #define SELECT_ALL_PLANES() outpw(0x03c4, 0xff02)
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18 byte far* data; /* the data for the page */
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19 word dx; /* col we are viewing on the virtual screen */
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20 word dy; /* row we are viewing on the virtual screen */
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21 word width; /* virtual width of the page */
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22 word height; /* virtual height of the page */
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26 /* -============================ Functions =============================- */
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27 /* mode switching, page, and plane functions */
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30 page_t modexDefaultPage();
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31 page_t modexNextPage(page_t *p);
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32 void modexShowPage(page_t *page);
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33 void modexPanPage(page_t *page, int dx, int dy);
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34 void modexSelectPlane(byte plane);
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35 void modexClearRegion(page_t *page, int x, int y, int w, int h, byte color);
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36 void modexDrawBmp(page_t *page, int x, int y, bitmap_t *bmp);
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37 void modexDrawBmpRegion(page_t *page, int x, int y, int rx, int ry, int rw, int rh, bitmap_t *bmp);
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38 void modexDrawSprite(page_t *page, int x, int y, bitmap_t *bmp);
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39 void modexDrawSpriteRegion(page_t *page, int x, int y, int rx, int ry, int rw, int rh, bitmap_t *bmp);
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40 void modexCopyPageRegion(page_t *dest, page_t *src, word sx, word sy, word dx, word dy, word width, word height);
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42 /* Palette fade and flash effects */
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43 void modexFadeOn(word fade, byte *palette);
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44 void modexFadeOff(word fade, byte *palette);
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45 void modexFlashOn(word fade, byte *palette);
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46 void modexFlashOff(word fade, byte *palette);
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48 /* palette loading and saving */
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49 void modexPalSave(byte *palette);
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50 byte *modexNewPal();
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51 void modexLoadPalFile(char *filename, byte **palette);
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52 void modexSavePalFile(char *filename, byte *palette);
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54 /* fixed palette functions */
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55 void modexPalBlack();
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56 void modexPalWhite();
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58 /* utility functions */
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59 void modexPalUpdate(byte *p);
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60 void modexWaitBorder();
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62 /* -======================= Constants & Vars ==========================- */
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63 extern byte far* VGA; /* The VGA Memory */
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64 #define SCREEN_SEG 0xa000
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65 #define VIDEO_INT 0x10
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66 #define SET_MODE 0x00
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67 #define VGA_256_COLOR_MODE 0x13
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68 #define TEXT_MODE 0x03
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69 #define SCREEN_WIDTH 320
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70 #define SCREEN_HEIGHT 240
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71 #define PAGE_SIZE (word)(SCREEN_WIDTH/4 * SCREEN_HEIGHT)
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73 #define AC_INDEX 0x03c0
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74 #define SC_INDEX 0x03c4
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75 #define SC_DATA 0x03c5
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76 #define CRTC_INDEX 0x03d4
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77 #define CRTC_DATA 0x03d5
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78 #define GC_INDEX 0x03ce
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79 #define MISC_OUTPUT 0x03c2
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80 #define HIGH_ADDRESS 0x0C
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81 #define LOW_ADDRESS 0x0D
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82 #define VRETRACE 0x08
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83 #define INPUT_STATUS_1 0x03da
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84 #define DISPLAY_ENABLE 0x01
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85 #define MAP_MASK 0x02
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86 #define PAL_READ_REG 0x03C7 /* Color register, read address */
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87 #define PAL_WRITE_REG 0x03C8 /* Color register, write address */
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88 #define PAL_DATA_REG 0x03C9 /* Color register, data port */
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89 #define PAL_SIZE (256 * 3)
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