X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=ld45_start_nothing;a=blobdiff_plain;f=tools%2Fcsprite%2Fsrc%2Fmain.c;fp=tools%2Fcsprite%2Fsrc%2Fmain.c;h=dd9be02f17f206539161b0d4258319f72164a387;hp=0000000000000000000000000000000000000000;hb=8a43487117b23806e478603f3c8ab72e37cd1882;hpb=78cf90d60c7cdbfcb8bc1d3e3d03a577d1b70f7b

diff --git a/tools/csprite/src/main.c b/tools/csprite/src/main.c
new file mode 100644
index 0000000..dd9be02
--- /dev/null
+++ b/tools/csprite/src/main.c
@@ -0,0 +1,279 @@
+#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");
+}