mirror of
https://github.com/weiju/amiga-stuff
synced 2025-11-19 16:01:31 +00:00
372 lines
8.4 KiB
C
372 lines
8.4 KiB
C
#include <exec/exec.h>
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#include <dos/dos.h>
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#include <intuition/intuition.h>
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#include <graphics/gfx.h>
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#include <hardware/custom.h>
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#include <hardware/dmabits.h>
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#include <clib/exec_protos.h>
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#include <clib/dos_protos.h>
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#include <clib/graphics_protos.h>
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#include <clib/intuition_protos.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "hardware.h"
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#include "cop_x.h"
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#include "global_defs.h"
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#include "common.h"
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#define BITMAPWIDTH ((SCREENWIDTH + EXTRAWIDTH) * 2)
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#define BITMAPBYTESPERROW (BITMAPWIDTH / 8)
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#define HALFBITMAPWIDTH (BITMAPWIDTH / 2)
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#define BITMAPBLOCKSPERROW (BITMAPWIDTH / BLOCKWIDTH)
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#define HALFBITMAPBLOCKSPERROW (BITMAPBLOCKSPERROW / 2)
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#define BITMAPBLOCKSPERCOL (BITMAPHEIGHT / BLOCKHEIGHT)
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#define BITMAPPLANELINES (BITMAPHEIGHT * BLOCKSDEPTH)
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#define BLOCKPLANELINES (BLOCKHEIGHT * BLOCKSDEPTH)
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#define BLOCKSFILESIZE (BLOCKSWIDTH * BLOCKSHEIGHT * BLOCKSPLANES / 8 + PALSIZE)
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struct Screen *scr;
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struct RastPort *ScreenRastPort;
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struct BitMap *BlocksBitmap, *ScreenBitmap;
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UBYTE *frontbuffer, *blocksbuffer;
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WORD mapposx,videoposx;
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struct LevelMap level_map;
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UWORD colors[BLOCKSCOLORS];
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struct PrgOptions options;
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char s[256];
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struct FetchInfo fetchinfo [] =
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{
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{0x30,0xD0,2,0,16}, /* normal */
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{0x28,0xC8,4,16,32}, /* BPL32 */
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{0x28,0xC8,4,16,32}, /* BPAGEM */
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{0x18,0xB8,8,48,64} /* BPL32 + BPAGEM */
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};
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/************* SETUP/CLEANUP ROUTINES ***************/
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static void Cleanup(char *msg)
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{
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WORD rc;
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if (msg) {
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printf("Error: %s\n",msg);
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rc = RETURN_WARN;
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} else rc = RETURN_OK;
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if (scr) CloseScreen(scr);
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if (ScreenBitmap) {
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WaitBlit();
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FreeBitMap(ScreenBitmap);
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}
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if (BlocksBitmap) {
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WaitBlit();
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FreeBitMap(BlocksBitmap);
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}
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if (level_map.raw_map) free(level_map.raw_map);
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exit(rc);
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}
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static void OpenDisplay(void)
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{
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ULONG modeid;
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LONG bmflags;
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if (!(ScreenBitmap = AllocBitMap(BITMAPWIDTH,BITMAPHEIGHT + 3,BLOCKSDEPTH,
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BMF_STANDARD | BMF_INTERLEAVED | BMF_CLEAR,0))) {
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Cleanup("Can't alloc screen bitmap!");
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}
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frontbuffer = ScreenBitmap->Planes[0];
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frontbuffer += (fetchinfo[options.fetchmode].bitmapoffset / 8);
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if (!(TypeOfMem(ScreenBitmap->Planes[0]) & MEMF_CHIP)) {
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Cleanup("Screen bitmap is not in CHIP RAM!?? If you have a gfx card try disabling \"planes to fast\" or similiar options in your RTG system!");
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}
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if (!IS_BITMAP_INTERLEAVED(ScreenBitmap)) {
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Cleanup("Screen bitmap is not in interleaved format!??");
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}
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modeid = get_mode_id(options.how, options.ntsc);
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if (!(scr = OpenScreenTags(0,SA_Width,BITMAPWIDTH,
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SA_Height,BITMAPHEIGHT + 3,
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SA_Depth,BLOCKSDEPTH,
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SA_DisplayID,modeid,
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SA_BitMap,ScreenBitmap,
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options.how ? SA_Overscan : TAG_IGNORE,OSCAN_TEXT,
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options.how ? SA_AutoScroll : TAG_IGNORE,TRUE,
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SA_Quiet,TRUE,
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TAG_DONE))) {
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Cleanup("Can't open screen!");
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}
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if (scr->RastPort.BitMap->Planes[0] != ScreenBitmap->Planes[0]) {
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Cleanup("Screen was not created with the custom bitmap I supplied!??");
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}
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ScreenRastPort = &scr->RastPort;
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LoadRGB4(&scr->ViewPort,colors,BLOCKSCOLORS);
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}
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static void InitCopperlist(void)
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{
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WORD *wp;
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LONG l;
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WaitVBL();
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custom->dmacon = 0x7FFF;
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custom->beamcon0 = options.ntsc ? 0 : DISPLAYPAL;
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CopFETCHMODE[1] = options.fetchmode;
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// bitplane control registers
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CopBPLCON0[1] = ((BLOCKSDEPTH * BPL0_BPU0_F) & BPL0_BPUMASK) +
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((BLOCKSDEPTH / 8) * BPL0_BPU3_F) +
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BPL0_COLOR_F +
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(options.speed ? 0 : BPL0_USEBPLCON3_F);
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CopBPLCON1[1] = 0;
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CopBPLCON3[1] = BPLCON3_BRDNBLNK;
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// bitplane modulos
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l = BITMAPBYTESPERROW * BLOCKSDEPTH -
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SCREENBYTESPERROW - fetchinfo[options.fetchmode].modulooffset;
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CopBPLMODA[1] = l;
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CopBPLMODB[1] = l;
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// display window start/stop
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CopDIWSTART[1] = DIWSTART;
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CopDIWSTOP[1] = DIWSTOP;
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// display data fetch start/stop
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CopDDFSTART[1] = fetchinfo[options.fetchmode].ddfstart;
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CopDDFSTOP[1] = fetchinfo[options.fetchmode].ddfstop;
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// plane pointers
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wp = CopPLANE1H;
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for (l = 0;l < BLOCKSDEPTH;l++) {
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wp[1] = (WORD)(((ULONG)ScreenBitmap->Planes[l]) >> 16);
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wp[3] = (WORD)(((ULONG)ScreenBitmap->Planes[l]) & 0xFFFF);
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wp += 4;
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}
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if (options.sky) {
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// activate copper sky
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CopSKY[0] = 0x290f;
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}
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custom->intena = 0x7FFF;
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custom->dmacon = DMAF_SETCLR | DMAF_BLITTER | DMAF_COPPER | DMAF_RASTER | DMAF_MASTER;
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custom->cop2lc = (ULONG)CopperList;
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}
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/******************* SCROLLING **********************/
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static void DrawBlock(LONG x, LONG y, LONG mapx, LONG mapy)
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{
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UBYTE block;
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// x = in pixels
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// y = in "planelines" (1 realline = BLOCKSDEPTH planelines)
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x = x / 8;
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y = y * BITMAPBYTESPERROW;
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block = level_map.data[mapy * level_map.width + mapx];
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mapx = (block % BLOCKSPERROW) * (BLOCKWIDTH / 8);
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mapy = (block / BLOCKSPERROW) * (BLOCKPLANELINES * BLOCKSBYTESPERROW);
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if (options.how) OwnBlitter();
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HardWaitBlit();
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custom->bltcon0 = 0x9F0; // use A and D. Op: D = A
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custom->bltcon1 = 0;
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custom->bltafwm = 0xFFFF;
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custom->bltalwm = 0xFFFF;
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custom->bltamod = BLOCKSBYTESPERROW - (BLOCKWIDTH / 8);
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custom->bltdmod = BITMAPBYTESPERROW - (BLOCKWIDTH / 8);
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custom->bltapt = blocksbuffer + mapy + mapx;
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custom->bltdpt = frontbuffer + y + x;
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custom->bltsize = BLOCKPLANELINES * 64 + (BLOCKWIDTH / 16);
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if (options.how) DisownBlitter();
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}
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static void FillScreen(void)
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{
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WORD a,b,x,y;
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for (b = 0;b < BITMAPBLOCKSPERCOL;b++) {
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for (a = 0;a < HALFBITMAPBLOCKSPERROW;a++) {
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x = a * BLOCKWIDTH;
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y = b * BLOCKPLANELINES;
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DrawBlock(x,y,a,b);
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DrawBlock(x + HALFBITMAPWIDTH,y,a,b);
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}
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}
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}
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static void ScrollLeft(void)
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{
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WORD mapx,mapy,x,y;
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if (mapposx < 1) return;
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mapposx--;
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videoposx = mapposx % HALFBITMAPWIDTH;
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mapx = mapposx / BLOCKWIDTH;
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mapy = mapposx & (NUMSTEPS - 1);
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x = ROUND2BLOCKWIDTH(videoposx);
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y = mapy * BLOCKPLANELINES;
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DrawBlock(x,y,mapx,mapy);
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DrawBlock(x + HALFBITMAPWIDTH,y,mapx,mapy);
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}
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static void ScrollRight(void)
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{
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WORD mapx,mapy,x,y;
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if (mapposx >= (level_map.width * BLOCKWIDTH - SCREENWIDTH - BLOCKWIDTH)) return;
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mapx = mapposx / BLOCKWIDTH + HALFBITMAPBLOCKSPERROW;
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mapy = mapposx & (NUMSTEPS - 1);
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x = ROUND2BLOCKWIDTH(videoposx);
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y = mapy * BLOCKPLANELINES;
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DrawBlock(x,y,mapx,mapy);
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DrawBlock(x + HALFBITMAPWIDTH,y,mapx,mapy);
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mapposx++;
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videoposx = mapposx % HALFBITMAPWIDTH;
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}
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static void CheckJoyScroll(void)
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{
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WORD i,count;
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if (JoyFire()) count = 8; else count = 1;
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if (JoyLeft()) {
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for (i = 0; i < count; i++) ScrollLeft();
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}
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if (JoyRight()) {
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for (i = 0; i < count; i++) ScrollRight();
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}
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}
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static void UpdateCopperlist(void)
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{
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ULONG pl;
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WORD xpos,planeaddx,scroll,i;
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WORD *wp;
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i = fetchinfo[options.fetchmode].scrollpixels;
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xpos = videoposx + i - 1;
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planeaddx = (xpos / i) * (i / 8);
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i = (i - 1) - (xpos & (i - 1));
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scroll = (i & 15) * 0x11;
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if (i & 16) scroll |= (0x400 + 0x4000);
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if (i & 32) scroll |= (0x800 + 0x8000);
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// set scroll register in BPLCON1
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CopBPLCON1[1] = scroll;
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// set plane pointers
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wp = CopPLANE1H;
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for (i = 0;i < BLOCKSDEPTH;i++) {
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pl = ((ULONG)ScreenBitmap->Planes[i]) + planeaddx;
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wp[1] = (WORD)(pl >> 16);
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wp[3] = (WORD)(pl & 0xFFFF);
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wp += 4;
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}
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}
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static void ShowWhatCopperWouldDo(void)
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{
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SetWriteMask(ScreenRastPort,1);
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SetAPen(ScreenRastPort,0);
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RectFill(ScreenRastPort,0,BITMAPHEIGHT + 1,BITMAPWIDTH - 1,BITMAPHEIGHT + 1);
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SetAPen(ScreenRastPort,1);
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RectFill(ScreenRastPort,videoposx + BLOCKWIDTH,BITMAPHEIGHT + 1,
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videoposx + BLOCKWIDTH + SCREENWIDTH - 1,BITMAPHEIGHT + 1);
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}
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static void MainLoop(void)
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{
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if (!options.how) {
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// activate copperlist
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HardWaitBlit();
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WaitVBL();
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custom->copjmp2 = 0;
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}
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while (!LMBDown()) {
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if (!options.how) {
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WaitVBeam(199);
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WaitVBeam(200);
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} else Delay(1);
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if (options.speed) *(WORD *)0xdff180 = 0xFF0;
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CheckJoyScroll();
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if (options.speed) *(WORD *)0xdff180 = 0xF00;
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if (!options.how) UpdateCopperlist();
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else ShowWhatCopperWouldDo();
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}
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}
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/********************* MAIN *************************/
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int main(int argc, char **argv)
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{
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BOOL res = get_arguments(&options, s);
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if (!res) Cleanup(s);
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res = read_level_map(&level_map, s);
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if (!res) Cleanup(s);
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BlocksBitmap = read_blocks(colors, s);
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if (!BlocksBitmap) Cleanup(s);
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blocksbuffer = BlocksBitmap->Planes[0];
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OpenDisplay();
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if (!options.how) {
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Delay(2*50);
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KillSystem();
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InitCopperlist();
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}
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FillScreen();
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MainLoop();
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if (!options.how) ActivateSystem();
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Cleanup(0);
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return 0;
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}
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