--- /dev/null
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <assert.h>
+#include <alloca.h>
+#include "image.h"
+
+struct rect {
+ int x, y, w, h;
+};
+
+int csprite(struct image *img, int x, int y, int xsz, int ysz);
+int proc_sheet(const char *fname);
+void print_usage(const char *argv0);
+
+int tile_xsz, tile_ysz;
+struct rect rect;
+int cmap_offs;
+int ckey;
+int fbpitch = 320;
+const char *name = "sprite";
+
+int main(int argc, char **argv)
+{
+ int i;
+ char *endp;
+
+ for(i=1; i<argc; i++) {
+ if(argv[i][0] == '-') {
+ if(strcmp(argv[i], "-s") == 0 || strcmp(argv[i], "-size") == 0) {
+ if(sscanf(argv[++i], "%dx%d", &tile_xsz, &tile_ysz) != 2 ||
+ tile_xsz <= 0 || tile_ysz <= 0) {
+ fprintf(stderr, "%s must be followed by WIDTHxHEIGHT\n", argv[i - 1]);
+ return 1;
+ }
+
+ } else if(strcmp(argv[i], "-r") == 0 || strcmp(argv[i], "-rect") == 0) {
+ rect.x = rect.y = 0;
+ if(sscanf(argv[++i], "%dx%d+%d+%d", &rect.w, &rect.h, &rect.x, &rect.y) < 2 || rect.w <= 0 || rect.h <= 0) {
+ fprintf(stderr, "%s must be followed by WIDTHxHEIGHT+X+Y\n", argv[i - 1]);
+ return 1;
+ }
+
+ } else if(strcmp(argv[i], "-coffset") == 0) {
+ cmap_offs = strtol(argv[++i], &endp, 10);
+ if(endp == argv[i] || cmap_offs < 0 || cmap_offs >= 256) {
+ fprintf(stderr, "-coffset must be followed by a valid colormap offset\n");
+ return 1;
+ }
+
+ } else if(strcmp(argv[i], "-fbpitch") == 0) {
+ fbpitch = atoi(argv[++i]);
+ if(fbpitch <= 0) {
+ fprintf(stderr, "-fbpitch must be followed by a positive number\n");
+ return 1;
+ }
+
+ } else if(strcmp(argv[i], "-n") == 0 || strcmp(argv[i], "-name") == 0) {
+ name = argv[++i];
+ if(!name) {
+ fprintf(stderr, "%s must be followed by a name\n", argv[i - 1]);
+ return 1;
+ }
+
+ } else if(strcmp(argv[i], "-k") == 0 || strcmp(argv[i], "-key") == 0) {
+ ckey = strtol(argv[++i], &endp, 10);
+ if(endp == argv[i] || ckey < 0 || ckey >= 256) {
+ fprintf(stderr, "%s must be followed by a valid color key\n", argv[i - 1]);
+ return 1;
+ }
+
+ } else if(strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "-help") == 0) {
+ print_usage(argv[0]);
+ return 0;
+
+ } else {
+ fprintf(stderr, "invalid option: %s\n", argv[i]);
+ print_usage(argv[0]);
+ return 1;
+ }
+
+ } else {
+ if(proc_sheet(argv[i]) == -1) {
+ return 1;
+ }
+ }
+ }
+
+ return 0;
+}
+
+const char *prefixfmt =
+ "\tglobal %s\n"
+ "%s:\n"
+ "\tmov eax, [esp + 12]\n"
+ "\tmov ecx, %d\n"
+ "\tmul ecx\n"
+ "\tadd eax, [esp + 8]\n"
+ "\tadd eax, [esp + 4]\n"
+ "\tmov edx, eax\n"
+ "\tmov eax, [esp + 16]\n"
+ "\tjmp [.tiletab + eax * 4]\n\n"
+ ".tiletab:\n";
+
+int proc_sheet(const char *fname)
+{
+ int i, j, num_xtiles, num_ytiles, xsz, ysz, tidx;
+ struct image img;
+
+ if(load_image(&img, fname) == -1) {
+ fprintf(stderr, "failed to load image: %s\n", fname);
+ return -1;
+ }
+ if(rect.w <= 0) {
+ rect.w = img.width;
+ rect.h = img.height;
+ }
+
+ if(tile_xsz <= 0) {
+ num_xtiles = num_ytiles = 1;
+ xsz = rect.w;
+ ysz = rect.h;
+ } else {
+ num_xtiles = rect.w / tile_xsz;
+ num_ytiles = rect.h / tile_ysz;
+ xsz = tile_xsz;
+ ysz = tile_ysz;
+ }
+
+ printf(prefixfmt, name, name, fbpitch);
+ for(i=0; i<num_ytiles*num_xtiles; i++) {
+ printf("\tdd .tile%d\n", i);
+ }
+ putchar('\n');
+
+ tidx = 0;
+ for(i=0; i<num_ytiles; i++) {
+ for(j=0; j<num_xtiles; j++) {
+ printf(".tile%d:\n", tidx++);
+ csprite(&img, rect.x + j * xsz, rect.y + i * ysz, xsz, ysz);
+ }
+ }
+
+ /* output colormap */
+ printf("\n\tglobal %s_cmap_size\n", name);
+ printf("\tglobal %s_cmap\n", name);
+ printf("%s_cmap_size: dd %d\n\n", name, img.cmap_ncolors);
+ printf("%s_cmap:\n", name);
+
+ for(i=0; i<img.cmap_ncolors; i++) {
+ printf("\tdb %d, %d, %d\n", img.cmap[i].r, img.cmap[i].g, img.cmap[i].b);
+ }
+
+ return 0;
+}
+
+enum {
+ CSOP_SKIP,
+ CSOP_FILL,
+ CSOP_COPY,
+ CSOP_ENDL
+};
+
+struct csop {
+ unsigned char op, val;
+ int len;
+};
+
+int csprite(struct image *img, int x, int y, int xsz, int ysz)
+{
+ int i, j, numops, mode, new_mode, start, skip_acc;
+ unsigned char *pptr = img->pixels + y * img->scansz + x;
+ struct csop *ops, *optr;
+
+ ops = optr = alloca((xsz + 1) * ysz * sizeof *ops);
+
+ for(i=0; i<ysz; i++) {
+ mode = -1;
+ start = -1;
+
+ if(i > 0) {
+ optr++->op = CSOP_ENDL;
+ }
+
+ for(j=0; j<xsz; j++) {
+ if(*pptr == ckey) {
+ new_mode = CSOP_SKIP;
+ } else {
+ new_mode = CSOP_COPY;
+ }
+
+ if(new_mode != mode) {
+ if(mode != -1) {
+ assert(start >= 0);
+ optr->op = mode;
+ optr->len = j - start;
+ optr++;
+ }
+ mode = new_mode;
+ start = j;
+ }
+ pptr++;
+ }
+ pptr += img->scansz - xsz;
+
+ if(mode != -1) {
+ assert(start >= 0);
+ optr->op = mode;
+ optr->len = xsz - start;
+ optr++;
+ }
+ }
+ numops = optr - ops;
+
+ pptr = img->pixels + y * img->scansz + x;
+ optr = ops;
+ skip_acc = 0;
+ /* edx points to dest */
+ for(i=0; i<numops; i++) {
+ switch(optr->op) {
+ case CSOP_SKIP:
+ skip_acc += optr->len;
+ pptr += optr->len;
+ break;
+
+ case CSOP_ENDL:
+ skip_acc += fbpitch - xsz;
+ pptr += img->scansz - xsz;
+ break;
+
+ case CSOP_COPY:
+ if(skip_acc) {
+ printf("\tadd edx, %d\n", skip_acc);
+ skip_acc = 0;
+ }
+
+ for(j=0; j<optr->len / 4; j++) {
+ printf("\tmov dword [edx + %d], 0x%x\n", j * 4, *(uint32_t*)pptr);
+ pptr += 4;
+ }
+ j *= 4;
+ switch(optr->len % 4) {
+ case 3:
+ printf("\tmov byte [edx + %d], 0x%x\n", j++, (unsigned int)*pptr++);
+ case 2:
+ printf("\tmov word [edx + %d], 0x%x\n", j, (unsigned int)*(uint16_t*)pptr);
+ pptr += 2;
+ j += 2;
+ break;
+ case 1:
+ printf("\tmov byte [edx + %d], 0x%x\n", j++, (unsigned int)*pptr++);
+ break;
+ }
+
+ skip_acc = optr->len;
+ break;
+
+ default:
+ printf("\t; invalid op: %d\n", optr->op);
+ }
+ optr++;
+ }
+ printf("\tret\n");
+
+ return 0;
+}
+
+void print_usage(const char *argv0)
+{
+ printf("Usage: %s [options] <spritesheet>\n", argv0);
+ printf("Options:\n");
+ printf(" -s,-size <WxH>: tile size (default: whole image)\n");
+ printf(" -r,-rect <WxH+X+Y>: use rectangle of the input image (default: whole image)\n");
+ printf(" -coffset <offs>: colormap offset [0, 255] (default: 0)\n");
+ printf(" -fbpitch <pitch>: target framebuffer pitch (scanline size in bytes)\n");
+ printf(" -k,-key <color>: color-key for transparency (default: 0)\n");
+ printf(" -h: print usage and exit\n");
+}
projects / ld45_start_nothing / blobdiff