13 enum { AS_GNU, AS_NASM };
15 int csprite(struct image *img, int x, int y, int xsz, int ysz);
16 int proc_sheet(const char *fname);
17 void print_usage(const char *argv0);
19 int tile_xsz, tile_ysz;
23 int fbpitch, fbwidth = 320;
24 const char *name = "sprite";
28 const char *wrop = "mov";
30 int main(int argc, char **argv)
35 for(i=1; i<argc; i++) {
36 if(argv[i][0] == '-') {
37 if(strcmp(argv[i], "-s") == 0 || strcmp(argv[i], "-size") == 0) {
38 if(sscanf(argv[++i], "%dx%d", &tile_xsz, &tile_ysz) != 2 ||
39 tile_xsz <= 0 || tile_ysz <= 0) {
40 fprintf(stderr, "%s must be followed by WIDTHxHEIGHT\n", argv[i - 1]);
44 } else if(strcmp(argv[i], "-r") == 0 || strcmp(argv[i], "-rect") == 0) {
46 if(sscanf(argv[++i], "%dx%d+%d+%d", &rect.w, &rect.h, &rect.x, &rect.y) < 2 || rect.w <= 0 || rect.h <= 0) {
47 fprintf(stderr, "%s must be followed by WIDTHxHEIGHT+X+Y\n", argv[i - 1]);
51 } else if(strcmp(argv[i], "-p") == 0 || strcmp(argv[i], "-pad") == 0) {
52 padding = strtol(argv[++i], &endp, 10);
53 if(endp == argv[i] || padding < 0) {
54 fprintf(stderr, "%s must be followed by a positive number\n", argv[i - 1]);
58 } else if(strcmp(argv[i], "-coffset") == 0) {
59 cmap_offs = strtol(argv[++i], &endp, 10);
60 if(endp == argv[i] || cmap_offs < 0 || cmap_offs >= 256) {
61 fprintf(stderr, "-coffset must be followed by a valid colormap offset\n");
65 } else if(strcmp(argv[i], "-fbwidth") == 0) {
66 fbwidth = atoi(argv[++i]);
68 fprintf(stderr, "-fbwidth must be followed by a positive number\n");
72 } else if(strcmp(argv[i], "-fbpitch") == 0) {
73 fbpitch = atoi(argv[++i]);
75 fprintf(stderr, "-fbpitch must be followed by a positive number\n");
79 } else if(strcmp(argv[i], "-n") == 0 || strcmp(argv[i], "-name") == 0) {
82 fprintf(stderr, "%s must be followed by a name\n", argv[i - 1]);
86 } else if(strcmp(argv[i], "-k") == 0 || strcmp(argv[i], "-key") == 0) {
87 ckey = strtol(argv[++i], &endp, 10);
88 if(endp == argv[i] || ckey < 0) {
89 fprintf(stderr, "%s must be followed by a valid color key\n", argv[i - 1]);
93 } else if(strcmp(argv[i], "-conv565") == 0) {
96 } else if(strcmp(argv[i], "-x") == 0 || strcmp(argv[i], "-xor") == 0) {
99 } else if(strcmp(argv[i], "-gas") == 0) {
102 } else if(strcmp(argv[i], "-nasm") == 0) {
105 } else if(strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "-help") == 0) {
106 print_usage(argv[0]);
110 fprintf(stderr, "invalid option: %s\n", argv[i]);
111 print_usage(argv[0]);
116 if(proc_sheet(argv[i]) == -1) {
125 /* prototype of generated function is (void *fb, int x, int y, int idx) */
126 const char *prefixfmt[] = {
127 /* GNU assembler template */
133 "\tmov 12(%%esp), %%eax\n"
136 "\tadd 8(%%esp), %%eax\n"
137 "\tadd 4(%%esp), %%eax\n"
138 "\tmov %%eax, %%edx\n"
139 "\tmov 16(%%esp), %%eax\n"
140 "\tjmp *tiletab(,%%eax,4)\n\n"
144 /* TODO hardcoding the 16bpp changes for now, generalize later
145 * and while we're at it, let's get rid of the mul too ...
152 "\tmov eax, [esp + 12]\n"
159 "\tadd eax, [esp + 8]\n"
160 "\tadd eax, [esp + 8]\n"
161 "\tadd eax, [esp + 4]\n"
163 "\tmov eax, [esp + 16]\n"
164 "\tjmp [titletab + eax * 4]\n\n"
168 int proc_sheet(const char *fname)
170 int i, j, x, y, num_xtiles, num_ytiles, xsz, ysz, tidx;
173 if(load_image(&img, fname) == -1) {
174 fprintf(stderr, "failed to load image: %s\n", fname);
179 if(conv_image_rgb565(&tmp, &img) == -1) {
180 fprintf(stderr, "failed to convert image to 16bpp 565: %s\n", fname);
188 if(!fbpitch) fbpitch = fbwidth * img.bpp / 8;
196 num_xtiles = num_ytiles = 1;
197 xsz = rect.w - padding;
198 ysz = rect.h - padding;
201 num_xtiles = num_ytiles = 0;
205 i += tile_xsz + padding;
210 i += tile_ysz + padding;
213 num_xtiles = rect.w / tile_xsz;
214 num_ytiles = rect.h / tile_ysz;
220 printf(prefixfmt[asyntax], name, name, name, name, fbpitch);
221 for(i=0; i<num_ytiles*num_xtiles; i++) {
222 if(asyntax == AS_GNU) {
223 printf("\t.long tile%d\n", i);
225 printf("\tdd tile%d\n", i);
232 for(i=0; i<num_ytiles; i++) {
234 for(j=0; j<num_xtiles; j++) {
235 printf("tile%d:\n", tidx++);
236 csprite(&img, x, y, xsz, ysz);
254 unsigned char op, val;
258 int csprite(struct image *img, int x, int y, int xsz, int ysz)
260 int i, j, numops, mode, new_mode, start, skip_acc, lenbytes, pixsz = img->bpp / 8;
261 unsigned char *pptr = img->pixels + y * img->scansz + x * pixsz;
262 struct csop *ops, *optr;
264 ops = optr = alloca((xsz + 1) * ysz * sizeof *ops);
266 for(i=0; i<ysz; i++) {
271 optr++->op = CSOP_ENDL;
274 for(j=0; j<xsz; j++) {
275 if(memcmp(pptr, &ckey, pixsz) == 0) {
276 new_mode = CSOP_SKIP;
278 new_mode = CSOP_COPY;
281 if(new_mode != mode) {
285 optr->len = j - start;
293 pptr += img->scansz - xsz * pixsz;
298 optr->len = xsz - start;
304 pptr = img->pixels + y * img->scansz + x * img->bpp / 8;
307 /* edx points to dest */
308 for(i=0; i<numops; i++) {
311 skip_acc += optr->len;
312 pptr += optr->len * pixsz;
316 skip_acc += fbwidth - xsz;
317 pptr += img->scansz - xsz * pixsz;
322 if(asyntax == AS_GNU) {
323 printf("\tadd $%d, %%edx\n", skip_acc * pixsz);
325 printf("\tadd edx, %d\n", skip_acc * pixsz);
330 lenbytes = optr->len * pixsz;
331 for(j=0; j<lenbytes / 4; j++) {
332 if(asyntax == AS_GNU) {
333 printf("\t%sl $0x%x, %d(%%edx)\n", wrop, *(uint32_t*)pptr, j * 4);
335 printf("\t%s dword [edx + %d], 0x%x\n", wrop, j * 4, *(uint32_t*)pptr);
340 switch(lenbytes % 4) {
342 if(asyntax == AS_GNU) {
343 printf("\t%sb $0x%x, %d(%%edx)\n", wrop, (unsigned int)*pptr++, j++);
345 printf("\t%s byte [edx + %d], 0x%x\n", wrop, j++, (unsigned int)*pptr++);
348 if(asyntax == AS_GNU) {
349 printf("\t%sw $0x%x, %d(%%edx)\n", wrop, (unsigned int)*(uint16_t*)pptr, j);
351 printf("\t%s word [edx + %d], 0x%x\n", wrop, j, (unsigned int)*(uint16_t*)pptr);
357 if(asyntax == AS_GNU) {
358 printf("\t%sb $0x%x, %d(%%edx)\n", wrop, (unsigned int)*pptr++, j++);
360 printf("\t%s byte [edx + %d], 0x%x\n", wrop, j++, (unsigned int)*pptr++);
365 skip_acc = optr->len;
369 printf("\t%c invalid op: %d\n", asyntax == AS_GNU ? '#' : ';', optr->op);
378 void print_usage(const char *argv0)
380 printf("Usage: %s [options] <spritesheet>\n", argv0);
381 printf("Options:\n");
382 printf(" -s,-size <WxH>: tile size (default: whole image)\n");
383 printf(" -r,-rect <WxH+X+Y>: use rectangle of the input image (default: whole image)\n");
384 printf(" -p,-pad <N>: how many pixels to skip between tiles in source image (default: 0)\n");
385 printf(" -coffset <offs>: colormap offset [0, 255] (default: 0)\n");
386 printf(" -fbpitch <pitch>: target framebuffer pitch (scanline size in bytes)\n");
387 printf(" -k,-key <color>: color-key for transparency (default: 0)\n");
388 printf(" -conv565: convert image to 16bpp 565 before processing\n");
389 printf(" -x,-xor: use XOR for writing pixels instead of MOV\n");
390 printf(" -gas: output GNU assembler code (default)\n");
391 printf(" -nasm: output NASM-compatible code\n");
392 printf(" -h: print usage and exit\n");