365 lines
9.8 KiB
C
365 lines
9.8 KiB
C
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#include "fileio.h"
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#include "resource.h"
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#include "sys.h"
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#include "unpack.h"
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#include "util.h"
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struct resource_data_t g_res;
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void res_init(int vga_size) {
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static const int SQL_SIZE = 640 * 25;
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g_res.sql = (uint8_t *)malloc(SQL_SIZE);
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if (!g_res.sql) {
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print_error("Failed to allocate sql buffer, %d bytes", SQL_SIZE);
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}
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static const int SPR_SQV_SIZE = 64000;
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g_res.spr_sqv = (uint8_t *)malloc(SPR_SQV_SIZE);
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if (!g_res.spr_sqv) {
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print_error("Failed to allocate sprite buffer, %d bytes", SPR_SQV_SIZE);
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}
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static const int AVT_SQV_SIZE = 437 * 16;
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g_res.avt_sqv = (uint8_t *)malloc(AVT_SQV_SIZE);
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if (!g_res.avt_sqv) {
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print_error("Failed to allocate avt buffer, %d bytes", AVT_SQV_SIZE);
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}
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const int tmp_size = 32000 + vga_size;
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g_res.tmp = (uint8_t *)malloc(tmp_size);
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if (!g_res.tmp) {
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print_error("Failed to allocate tmp buffer, %d bytes", tmp_size);
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}
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g_res.vga = (uint8_t *)malloc(vga_size);
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if (!g_res.vga) {
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print_error("Failed to allocate vga buffer, %d bytes", vga_size);
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}
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g_res.vga_size = vga_size;
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static const int TILES_SIZE = 640 * 200;
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g_res.tiles = (uint8_t *)malloc(TILES_SIZE);
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if (!g_res.tiles) {
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print_error("Failed to allocate tiles buffer, %d bytes", TILES_SIZE);
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}
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static const char *filename = "sound";
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if (fio_exists(filename)) {
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g_res.snd = (uint8_t *)malloc(SOUND_SIZE);
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if (!g_res.snd) {
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print_warning("Failed to allocate sound buffer, %d bytes", SOUND_SIZE);
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} else {
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read_file(filename, g_res.snd, SOUND_SIZE);
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}
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}
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if (fio_exists("demomag.sql")) {
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g_res.dos_demo = true;
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}
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if (fio_exists("mag.tbl")) {
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g_res.amiga_data = true;
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}
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}
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void res_fini() {
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free(g_res.sql);
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g_res.sql = 0;
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free(g_res.spr_sqv);
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g_res.spr_sqv = 0;
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free(g_res.avt_sqv);
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g_res.avt_sqv = 0;
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free(g_res.tmp);
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g_res.tmp = 0;
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free(g_res.vga);
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g_res.vga = 0;
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free(g_res.tiles);
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g_res.tiles = 0;
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free(g_res.snd);
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g_res.snd = 0;
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}
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int read_file(const char *filename, uint8_t *dst, int size) {
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const int f = fio_open(filename, 1);
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const int filesize = fio_size(f);
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if (size > 0 && size != filesize) {
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print_error("Unexpected '%s' file size %d (%d)", filename, filesize, size);
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} else if (fio_read(f, dst, filesize) != filesize) {
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print_error("Failed to read %d bytes from file '%s'", filesize, filename);
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}
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fio_close(f);
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return filesize;
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}
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int read_compressed_file(const char *filename, uint8_t *dst) {
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return unpack(filename, dst);
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}
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extern const uint8_t dither_cga_table[];
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static void dither_cga(int num, uint8_t *dst) {
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const uint8_t *p = dither_cga_table + num * 32;
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for (int i = 0; i < 16; ++i, p += 2) {
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dst[i] = p[0] & 3; // even scanline
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dst[0x10 + i] = p[1] & 3; // odd scanline
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}
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}
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static void copy_cga(uint8_t *dst, int dst_pitch, uint8_t *dither_lut) {
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for (int y = 0; y < 200; ++y) {
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const uint8_t *p = dither_lut + (y & 1) * 0x10;
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for (int x = 0; x < 320; ++x) {
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dst[x] = p[dst[x]] & 3;
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}
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dst += dst_pitch;
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}
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}
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static void decode_bitplane_scanline(const uint8_t *src, int depth, int w, uint8_t *dst) {
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const int plane_size = w / depth;
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for (int x = 0; x < plane_size; ++x) {
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for (int i = 0; i < 8; ++i) {
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int color = 0;
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const int mask = 1 << (7 - i);
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for (int bit = 0; bit < depth; ++bit) {
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if (src[bit * plane_size] & mask) {
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color |= 1 << bit;
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}
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}
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dst[i] = color;
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}
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++src;
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dst += 8;
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}
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}
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static void load_iff(const uint8_t *data, uint32_t size, uint8_t *dst, int dst_pitch, int cga_dither_pattern) {
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print_debug(DBG_RESOURCE, "load_iff size %d", size);
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if (data && memcmp(data, "FORM", 4) == 0) {
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int offset = 12;
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while (offset < size) {
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const uint8_t *buf = data + offset;
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const int len = (READ_BE_UINT32(buf + 4) + 1) & ~1;
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print_debug(DBG_RESOURCE, "tag '%c%c%c%c' len %d", buf[0], buf[1], buf[2], buf[3], len);
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if (memcmp(buf, "BMHD", 4) == 0) {
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buf += 8;
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const int w = READ_BE_UINT16(buf);
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const int h = READ_BE_UINT16(buf + 2);
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const int planes = buf[8];
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const int compression = buf[10];
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print_debug(DBG_RESOURCE, "w %d h %d planes %d compression %d", w, h, planes, compression);
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if (w != 320 || h < 200) {
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print_error("Unhandled LBM dimensions %d,%d", w, h);
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return;
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}
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if (planes != 4) {
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print_error("Unhandled LBM planes count %d", planes);
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return;
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}
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if (compression != 1) {
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print_error("Unhandled LBM compression %d", compression);
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return;
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}
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} else if (memcmp(buf, "CMAP", 4) == 0) {
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buf += 8;
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for (int i = 0; i < len; ++i) {
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g_res.palette[i] = buf[i];
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}
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} else if (memcmp(buf, "BODY", 4) == 0) {
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buf += 8;
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int offset = 0;
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int i = 0;
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int y = 0;
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uint8_t scanline[160];
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while (i < len && offset < 32000) {
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int code = (int8_t)buf[i++];
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if (code != -128) {
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const int scanline_offset = offset % 160;
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if (code < 0) {
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code = 1 - code;
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memset(scanline + scanline_offset, buf[i], code);
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++i;
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} else {
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++code;
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memcpy(scanline + scanline_offset, buf + i, code);
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i += code;
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}
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offset += code;
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if ((offset % 160) == 0) {
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decode_bitplane_scanline(scanline, 4, 160, dst + y * dst_pitch);
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++y;
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}
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}
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}
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print_debug(DBG_RESOURCE, "scanlines %d", y);
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}
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offset += 8 + len;
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}
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}
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if (!(cga_dither_pattern < 0)) {
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uint8_t cga_lut[16 * 2];
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dither_cga(cga_dither_pattern, cga_lut);
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copy_cga(dst, dst_pitch, cga_lut);
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}
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}
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void load_avt(const char *filename, uint8_t *dst, int offset, int dither_pattern) {
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read_compressed_file(filename, dst);
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const uint8_t *ptr = dst;
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const int count = READ_LE_UINT16(ptr); ptr += 6;
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print_debug(DBG_RESOURCE, "avt count %d", count);
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for (int i = 0; i < count; ++i) {
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g_res.avt[offset + i] = ptr;
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ptr += 132;
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}
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g_res.avt_count = count;
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if (!(dither_pattern < 0)) {
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dither_cga(dither_pattern, g_res.cga_lut_avt);
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}
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}
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static const uint8_t *trigger_lookup_table1(uint8_t num) {
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extern const uint8_t *level_triggersdata_3356[];
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assert(num < 4);
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return level_triggersdata_3356[num];
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}
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static const uint8_t *trigger_lookup_table2(uint8_t num) {
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if (num == 255) {
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return 0;
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}
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extern uint8_t *level_tilesdata_1e8c[];
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if (num < 128) {
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assert(num < 86);
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return level_tilesdata_1e8c[num];
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}
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extern uint8_t *level_tilesdata_1fe8[];
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num -= 128;
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assert(num < 17);
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return level_tilesdata_1fe8[num];
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}
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static const uint8_t *trigger_lookup_table3(uint8_t num) {
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if (num == 255) {
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return 0;
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}
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extern const uint8_t *level_triggersdata_2030[];
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assert(num < 61);
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return level_triggersdata_2030[num];
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}
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void load_bin(const char *filename) {
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uint8_t bin[MAX_TRIGGERS * 10];
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read_file(filename, bin, MAX_TRIGGERS * 10);
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const uint8_t *p = bin;
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for (int i = 0; i < MAX_TRIGGERS; ++i) {
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struct trigger_t *t = &g_res.triggers[i];
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t->tile_type = p[0];
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t->tile_flags = p[1];
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t->op_func = p[2];
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t->op_table1 = trigger_lookup_table1(p[3]);
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t->op_table2 = trigger_lookup_table2(p[4]);
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t->unk10 = p[5];
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t->op_table3 = trigger_lookup_table3(p[6]);
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t->unk16 = p[7];
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t->tile_index = p[8];
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t->foreground_tile_num = p[9];
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p += 10;
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}
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}
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void load_blk(const char *filename) {
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read_file(filename, g_res.tiles, 256 * 16 * 8);
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}
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void load_ck(const char *filename, uint16_t offset, int dither_pattern) {
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const int size = read_compressed_file(filename, g_res.tmp);
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switch (offset) {
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case 0x6000: // page3
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offset = 0;
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break;
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case 0x8000: // page4
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offset = 320;
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break;
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default:
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print_error("Unexpected offset 0x%x in load_ck()", offset);
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break;
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}
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load_iff(g_res.tmp, size, g_res.tiles + offset, 640, dither_pattern);
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if (dither_pattern < 0) {
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g_sys.set_screen_palette(g_res.palette, 16);
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}
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}
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void load_img(const char *filename, int screen_w, int dither_pattern) {
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int size;
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const char *ext = strrchr(filename, '.');
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if (ext && strcmp(ext + 1, "lbm") == 0) {
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size = read_file(filename, g_res.tmp, 0);
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} else {
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size = read_compressed_file(filename, g_res.tmp);
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}
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assert(size <= 32000);
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load_iff(g_res.tmp, size, g_res.tmp + 32000, screen_w, dither_pattern);
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if (dither_pattern < 0) {
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g_sys.set_screen_palette(g_res.palette, 16);
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}
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g_sys.update_screen(g_res.tmp + 32000, 0);
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memcpy(g_res.vga, g_res.tmp + 32000, g_res.vga_size);
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}
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void load_m(const char *filename) {
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const int filesize = read_file(filename, g_res.tmp, 0);
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const int count = READ_BE_UINT16(g_res.tmp);
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assert(filesize == 2 + count * 32);
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// 1-bit 16x16 mask
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}
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static int load_spr_helper(int offset, const uint8_t *ptr, uint16_t (*read16)(const uint8_t *), int depth) {
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const int count = read16(ptr); ptr += 6;
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print_debug(DBG_RESOURCE, "spr count %d", count);
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assert(offset + count <= MAX_SPR_FRAMES);
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for (int i = 0; i < count; ++i) {
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g_res.spr_frames[offset + i] = ptr;
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const int h = read16(ptr - 4);
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const int w = read16(ptr - 2);
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assert((w & 3) == 0);
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const int size = h * w * depth / 8;
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print_debug(DBG_RESOURCE, "sprite %d, dim %d,%d size %d", i, w, h, size);
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ptr += size + 4;
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}
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return count;
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}
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void load_spr(const char *filename, uint8_t *dst, int offset) {
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read_file(filename, dst, 0);
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// player sprites use 8 colors
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const int depth = (offset == 0) ? 3 : 4;
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const int count = load_spr_helper(offset, dst, READ_BE_UINT16, depth);
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g_res.spr_count = offset + count;
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// convert to little endian
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uint8_t *ptr = dst;
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for (int i = 0; i < count; ++i) {
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const int h = READ_BE_UINT16(ptr + 2);
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ptr[2] = h;
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ptr[3] = 0;
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const int w = READ_BE_UINT16(ptr + 4);
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ptr[4] = w;
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ptr[5] = 0;
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assert((w & 3) == 0);
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const int size = h * w * depth / 8;
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ptr += size + 4;
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}
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}
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void load_sqv(const char *filename, uint8_t *dst, int offset, int dither_pattern) {
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read_compressed_file(filename, dst);
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const int count = load_spr_helper(offset, dst, READ_LE_UINT16, 4);
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g_res.spr_count = offset + count;
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if (!(dither_pattern < 0)) {
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dither_cga(dither_pattern, g_res.cga_lut_sqv);
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}
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}
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void load_sql(const char *filename) {
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read_compressed_file(filename, g_res.sql);
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}
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uint8_t *lookup_sql(int x, int y) {
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return g_res.sql + y * 128 + x;
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}
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