+#include "modex16.h"\r
+#include <stdio.h>\r
+#include <stdlib.h>\r
+\r
+word far *clock= (word far*) 0x046C; /* 18.2hz clock */\r
+\r
+typedef struct {\r
+ bitmap_t *data;\r
+ word tileHeight;\r
+ word tileWidth;\r
+ word rows;\r
+ word cols;\r
+} tiles_t;\r
+\r
+\r
+typedef struct {\r
+ byte *data;\r
+ tiles_t *tiles;\r
+ word width;\r
+ word height;\r
+} map_t;\r
+\r
+\r
+typedef struct {\r
+ map_t *map;\r
+ page_t *page;\r
+ word tx;\r
+ word ty;\r
+} map_view_t;\r
+\r
+\r
+\r
+\r
+map_t allocMap(int w, int h);\r
+void initMap(map_t *map);\r
+void mapScrollRight(map_view_t *mv, byte offset);\r
+void mapScrollLeft(map_view_t *mv, byte offest);\r
+void mapScrollUp(map_view_t *mv, byte offset);\r
+void mapScrollDown(map_view_t *mv, byte offset);\r
+void mapGoTo(map_view_t *mv, byte tx, byte ty);\r
+void mapDrawTile(tiles_t *t, word i, page_t *page, word x, word y);\r
+\r
+void main() {\r
+ int show1=1;\r
+ int tx, ty;\r
+ int x, y;\r
+ page_t screen;\r
+ map_t map;\r
+ map_view_t mv;\r
+ byte *ptr;\r
+ \r
+ /* create the map */\r
+ map = allocMap(80,60);\r
+ initMap(&map);\r
+ mv.map = ↦\r
+\r
+ /* draw the tiles */\r
+ ptr = map.data;\r
+ modexEnter();\r
+ screen = modexDefaultPage();\r
+ screen.width = 352;\r
+ mv.page = &screen;\r
+ mapGoTo(&mv, 0, 0);\r
+\r
+ /* scroll all the way to the right */\r
+ for(x=0; x<(80*16-SCREEN_WIDTH); x++) {\r
+ mapScrollRight(&mv, 1);\r
+ modexShowPage(mv.page);\r
+ }\r
+ \r
+\r
+ /* spin for a time */\r
+ for(x=0; x<500; x++) {\r
+ modexWaitBorder();\r
+ }\r
+\r
+ modexLeave();\r
+}\r
+\r
+\r
+map_t\r
+allocMap(int w, int h) {\r
+ map_t result;\r
+ \r
+ result.width =w;\r
+ result.height=h;\r
+ result.data = malloc(sizeof(byte) * w * h);\r
+\r
+ return result;\r
+}\r
+\r
+\r
+void\r
+initMap(map_t *map) {\r
+ /* just a place holder to fill out an alternating pattern */\r
+ int x, y;\r
+ int i;\r
+ int tile = 1;\r
+ map->tiles = malloc(sizeof(tiles_t));\r
+\r
+ /* create the tile set */\r
+ map->tiles->data = malloc(sizeof(bitmap_t));\r
+ map->tiles->data->width = 32;\r
+ map->tiles->data->height= 16;\r
+ map->tiles->data->data = malloc(32*16);\r
+ map->tiles->tileHeight = 16;\r
+ map->tiles->tileWidth = 16;\r
+ map->tiles->rows = 1;\r
+ map->tiles->cols = 2;\r
+\r
+ i=0;\r
+ for(y=0; y<16; y++) {\r
+ for(x=0; x<32; x++) {\r
+ if(x<16)\r
+ map->tiles->data->data[i] = 0x00;\r
+ else\r
+ map->tiles->data->data[i] = 0x47;\r
+ i++;\r
+ }\r
+ }\r
+\r
+ i=0;\r
+ for(y=0; y<map->height; y++) {\r
+ for(x=0; x<map->width; x++) {\r
+ map->data[i] = tile;\r
+ tile = tile ? 0 : 1;\r
+ i++;\r
+ }\r
+ tile = tile ? 0 : 1;\r
+ }\r
+}\r
+\r
+\r
+void\r
+mapScrollRight(map_view_t *mv, byte offset) {\r
+ word x, y; /* coordinate for drawing */\r
+ unsigned int i;\r
+\r
+ /* increment the pixel position and update the page */\r
+ mv->page->dx += offset;\r
+\r
+ /* check to see if this changes the tile */\r
+ if(mv->page->dx >= 16) {\r
+ /* go forward one tile */\r
+ mv->tx++;\r
+ /* Snap the origin forward */\r
+ mv->page->data += 4;\r
+ mv->page->dx =0;\r
+\r
+\r
+ /* draw the next column */\r
+ x= SCREEN_WIDTH;\r
+ i= mv->ty * mv->map->width + mv->tx + 20;\r
+ for(y=0; y<240; y+=16) {\r
+ mapDrawTile(mv->map->tiles, mv->map->data[i], mv->page, (int)mv->page->dx + x, (int)mv->page->dy+y);\r
+ i += mv->map->width;\r
+ }\r
+ }\r
+}\r
+\r
+\r
+void\r
+mapScrollLeft(map_view_t *mv, byte offest) {\r
+}\r
+\r
+\r
+void\r
+mapScrollUp(map_view_t *mv, byte offset) {\r
+}\r
+\r
+\r
+void\r
+mapScrollDown(map_view_t *mv, byte offset) {\r
+}\r
+\r
+\r
+void\r
+mapGoTo(map_view_t *mv, byte tx, byte ty) {\r
+ int px, py;\r
+ unsigned int i;\r
+\r
+ /* set up the coordinates */\r
+ mv->tx = tx;\r
+ mv->ty = ty;\r
+ mv->page->dx = 0;\r
+ mv->page->dy = 0;\r
+\r
+ /* draw the tiles */\r
+ modexClearRegion(mv->page, 0, 0, mv->page->width, mv->page->height, 0);\r
+ py=0;\r
+ i=mv->ty * mv->map->width + mv->tx;\r
+ for(ty=mv->ty; py < SCREEN_HEIGHT && ty < mv->map->height; ty++, py+=mv->map->tiles->tileHeight) {\r
+ px=0;\r
+ for(tx=mv->tx; px < SCREEN_WIDTH+16 && tx < mv->map->width+1; tx++, px+=mv->map->tiles->tileWidth) {\r
+ mapDrawTile(mv->map->tiles, mv->map->data[i], mv->page, px, py);\r
+ i++;\r
+ }\r
+ i+=mv->map->width - tx;\r
+ }\r
+}\r
+\r
+\r
+void\r
+mapDrawTile(tiles_t *t, word i, page_t *page, word x, word y) {\r
+ word rx;\r
+ word ry;\r
+ rx = (i % t->cols) * t->tileWidth;\r
+ ry = (i / t->cols) * t->tileHeight;\r
+ modexDrawBmpRegion(page, x, y, rx, ry, t->tileWidth, t->tileHeight, t->data);\r
+}\r