zeppelin_kernel/scripts/pnmtologo.c at master · turl/zeppelin_kernel · GitHub

Repository navigation

History

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

378

379

380

381

382

383

384

385

386

387

388

389

390

391

392

393

394

395

396

397

398

399

400

401

402

403

404

405

406

407

408

409

410

411

412

413

414

415

416

417

418

419

420

421

422

423

424

425

426

427

428

429

430

431

432

433

434

435

436

437

438

439

440

441

442

443

444

445

446

447

448

449

450

451

452

453

454

455

456

457

458

459

460

461

462

463

464

465

466

467

468

469

470

471

472

473

474

475

476

477

478

479

480

481

482

483

484

485

486

487

488

489

490

491

492

493

494

495

496

497

498

499

500

501

502

503

504

505

506

507

* Convert a logo in ASCII PNM format to C source suitable for inclusion in

* the Linux kernel

* --------------------------------------------------------------------------

* This file is subject to the terms and conditions of the GNU General Public

* License. See the file COPYING in the main directory of the Linux

* distribution for more details.

#include <ctype.h>

#include <errno.h>

#include <stdarg.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

static const char *programname;

static const char *filename;

static const char *logoname = "linux_logo";

static const char *outputname;

static FILE *out;

#define LINUX_LOGO_MONO 1 /* monochrome black/white */

#define LINUX_LOGO_VGA16 2 /* 16 colors VGA text palette */

#define LINUX_LOGO_CLUT224 3 /* 224 colors */

#define LINUX_LOGO_GRAY256 4 /* 256 levels grayscale */

static const char *logo_types[LINUX_LOGO_GRAY256+1] = {

[LINUX_LOGO_MONO] = "LINUX_LOGO_MONO",

[LINUX_LOGO_VGA16] = "LINUX_LOGO_VGA16",

[LINUX_LOGO_CLUT224] = "LINUX_LOGO_CLUT224",

[LINUX_LOGO_GRAY256] = "LINUX_LOGO_GRAY256"

};

#define MAX_LINUX_LOGO_COLORS 224

struct color {

unsigned char red;

unsigned char green;

unsigned char blue;

};

static const struct color clut_vga16[16] = {

{ 0x00, 0x00, 0x00 },

{ 0x00, 0x00, 0xaa },

{ 0x00, 0xaa, 0x00 },

{ 0x00, 0xaa, 0xaa },

{ 0xaa, 0x00, 0x00 },

{ 0xaa, 0x00, 0xaa },

{ 0xaa, 0x55, 0x00 },

{ 0xaa, 0xaa, 0xaa },

{ 0x55, 0x55, 0x55 },

{ 0x55, 0x55, 0xff },

{ 0x55, 0xff, 0x55 },

{ 0x55, 0xff, 0xff },

{ 0xff, 0x55, 0x55 },

{ 0xff, 0x55, 0xff },

{ 0xff, 0xff, 0x55 },

{ 0xff, 0xff, 0xff },

};

static int logo_type = LINUX_LOGO_CLUT224;

static unsigned int logo_width;

static unsigned int logo_height;

static struct color **logo_data;

static struct color logo_clut[MAX_LINUX_LOGO_COLORS];

static unsigned int logo_clutsize;

static void die(const char *fmt, ...)

__attribute__ ((noreturn)) __attribute ((format (printf, 1, 2)));

static void usage(void) __attribute ((noreturn));

static unsigned int get_number(FILE *fp)

{

int c, val;

/* Skip leading whitespace */

do {

c = fgetc(fp);

if (c == EOF)

die("%s: end of file\n", filename);

if (c == '#') {

/* Ignore comments 'till end of line */

do {

c = fgetc(fp);

if (c == EOF)

die("%s: end of file\n", filename);

} while (c != '\n');

}

} while (isspace(c));

/* Parse decimal number */

val = 0;

while (isdigit(c)) {

val = 10*val+c-'0';

c = fgetc(fp);

if (c == EOF)

die("%s: end of file\n", filename);

}

return val;

}

static unsigned int get_number255(FILE *fp, unsigned int maxval)

{

unsigned int val = get_number(fp);

return (255*val+maxval/2)/maxval;

}

static void read_image(void)

{

FILE *fp;

unsigned int i, j;

int magic;

unsigned int maxval;

/* open image file */

fp = fopen(filename, "r");

if (!fp)

die("Cannot open file %s: %s\n", filename, strerror(errno));

/* check file type and read file header */

magic = fgetc(fp);

if (magic != 'P')

die("%s is not a PNM file\n", filename);

magic = fgetc(fp);

switch (magic) {

case '1':

case '2':

case '3':

/* Plain PBM/PGM/PPM */

break;

case '4':

case '5':

case '6':

/* Binary PBM/PGM/PPM */

die("%s: Binary PNM is not supported\n"

"Use pnmnoraw(1) to convert it to ASCII PNM\n", filename);

default:

die("%s is not a PNM file\n", filename);

}

logo_width = get_number(fp);

logo_height = get_number(fp);

/* allocate image data */

logo_data = (struct color **)malloc(logo_height*sizeof(struct color *));

if (!logo_data)

die("%s\n", strerror(errno));

for (i = 0; i < logo_height; i++) {

logo_data[i] = malloc(logo_width*sizeof(struct color));

if (!logo_data[i])

die("%s\n", strerror(errno));

}

/* read image data */

switch (magic) {

case '1':

/* Plain PBM */

for (i = 0; i < logo_height; i++)

for (j = 0; j < logo_width; j++)

logo_data[i][j].red = logo_data[i][j].green =

logo_data[i][j].blue = 255*(1-get_number(fp));

break;

case '2':

/* Plain PGM */

maxval = get_number(fp);

for (i = 0; i < logo_height; i++)

for (j = 0; j < logo_width; j++)

logo_data[i][j].red = logo_data[i][j].green =

logo_data[i][j].blue = get_number255(fp, maxval);

break;

case '3':

/* Plain PPM */

maxval = get_number(fp);

for (i = 0; i < logo_height; i++)

for (j = 0; j < logo_width; j++) {

logo_data[i][j].red = get_number255(fp, maxval);

logo_data[i][j].green = get_number255(fp, maxval);

logo_data[i][j].blue = get_number255(fp, maxval);

}

break;

}

/* close file */

fclose(fp);

}

static inline int is_black(struct color c)

{

return c.red == 0 && c.green == 0 && c.blue == 0;

}

static inline int is_white(struct color c)

{

return c.red == 255 && c.green == 255 && c.blue == 255;

}

static inline int is_gray(struct color c)

{

return c.red == c.green && c.red == c.blue;

}

static inline int is_equal(struct color c1, struct color c2)

{

return c1.red == c2.red && c1.green == c2.green && c1.blue == c2.blue;

}

static void write_header(void)

{

/* open logo file */

if (outputname) {

out = fopen(outputname, "w");

if (!out)

die("Cannot create file %s: %s\n", outputname, strerror(errno));

} else {

out = stdout;

}

fputs("/*\n", out);

fputs(" * DO NOT EDIT THIS FILE!\n", out);

fputs(" *\n", out);

fprintf(out, " * It was automatically generated from %s\n", filename);

fputs(" *\n", out);

fprintf(out, " * Linux logo %s\n", logoname);

fputs(" */\n\n", out);

fputs("#include <linux/linux_logo.h>\n\n", out);

fprintf(out, "static unsigned char %s_data[] __initdata = {\n",

logoname);

}

static void write_footer(void)

{

fputs("\n};\n\n", out);

fprintf(out, "struct linux_logo %s __initdata = {\n", logoname);

fprintf(out, " .type\t= %s,\n", logo_types[logo_type]);

fprintf(out, " .width\t= %d,\n", logo_width);

fprintf(out, " .height\t= %d,\n", logo_height);

if (logo_type == LINUX_LOGO_CLUT224) {

fprintf(out, " .clutsize\t= %d,\n", logo_clutsize);

fprintf(out, " .clut\t= %s_clut,\n", logoname);

}

fprintf(out, " .data\t= %s_data\n", logoname);

fputs("};\n\n", out);

/* close logo file */

if (outputname)

fclose(out);

}

static int write_hex_cnt;

static void write_hex(unsigned char byte)

{

if (write_hex_cnt % 12)

fprintf(out, ", 0x%02x", byte);

else if (write_hex_cnt)

fprintf(out, ",\n\t0x%02x", byte);

else

fprintf(out, "\t0x%02x", byte);

write_hex_cnt++;

}

static void write_logo_mono(void)

{

unsigned int i, j;

unsigned char val, bit;

/* validate image */

for (i = 0; i < logo_height; i++)

for (j = 0; j < logo_width; j++)

if (!is_black(logo_data[i][j]) && !is_white(logo_data[i][j]))

die("Image must be monochrome\n");

/* write file header */

write_header();

/* write logo data */

for (i = 0; i < logo_height; i++) {

for (j = 0; j < logo_width;) {

for (val = 0, bit = 0x80; bit && j < logo_width; j++, bit >>= 1)

if (logo_data[i][j].red)

val |= bit;

write_hex(val);

}

/* write logo structure and file footer */

write_footer();

}

static void write_logo_vga16(void)

{

unsigned int i, j, k;

unsigned char val;

/* validate image */

for (i = 0; i < logo_height; i++)

for (j = 0; j < logo_width; j++) {

for (k = 0; k < 16; k++)

if (is_equal(logo_data[i][j], clut_vga16[k]))

break;

if (k == 16)

die("Image must use the 16 console colors only\n"

"Use ppmquant(1) -map clut_vga16.ppm to reduce the number "

"of colors\n");

}

/* write file header */

write_header();

/* write logo data */

for (i = 0; i < logo_height; i++)

for (j = 0; j < logo_width; j++) {

for (k = 0; k < 16; k++)

if (is_equal(logo_data[i][j], clut_vga16[k]))

break;

val = k<<4;

if (++j < logo_width) {

for (k = 0; k < 16; k++)

if (is_equal(logo_data[i][j], clut_vga16[k]))

break;

val |= k;

}

write_hex(val);

}

/* write logo structure and file footer */

write_footer();

}

static void write_logo_clut224(void)

{

unsigned int i, j, k;

/* validate image */

for (i = 0; i < logo_height; i++)

for (j = 0; j < logo_width; j++) {

for (k = 0; k < logo_clutsize; k++)

if (is_equal(logo_data[i][j], logo_clut[k]))

break;

if (k == logo_clutsize) {

if (logo_clutsize == MAX_LINUX_LOGO_COLORS)

die("Image has more than %d colors\n"

"Use ppmquant(1) to reduce the number of colors\n",

MAX_LINUX_LOGO_COLORS);

logo_clut[logo_clutsize++] = logo_data[i][j];

}

/* write file header */

write_header();

/* write logo data */

for (i = 0; i < logo_height; i++)

for (j = 0; j < logo_width; j++) {

for (k = 0; k < logo_clutsize; k++)

if (is_equal(logo_data[i][j], logo_clut[k]))

break;

write_hex(k+32);

}

fputs("\n};\n\n", out);

/* write logo clut */

fprintf(out, "static unsigned char %s_clut[] __initdata = {\n",

logoname);

write_hex_cnt = 0;

for (i = 0; i < logo_clutsize; i++) {

write_hex(logo_clut[i].red);

write_hex(logo_clut[i].green);

write_hex(logo_clut[i].blue);

}

/* write logo structure and file footer */

write_footer();

}

static void write_logo_gray256(void)

{

unsigned int i, j;

/* validate image */

for (i = 0; i < logo_height; i++)

for (j = 0; j < logo_width; j++)

if (!is_gray(logo_data[i][j]))

die("Image must be grayscale\n");

/* write file header */

write_header();

/* write logo data */

for (i = 0; i < logo_height; i++)

for (j = 0; j < logo_width; j++)

write_hex(logo_data[i][j].red);

/* write logo structure and file footer */

write_footer();

}

static void die(const char *fmt, ...)

{

va_list ap;

va_start(ap, fmt);

vfprintf(stderr, fmt, ap);

va_end(ap);

exit(1);

}

static void usage(void)

{

die("\n"

"Usage: %s [options] <filename>\n"

"\n"

"Valid options:\n"

" -h : display this usage information\n"

" -n <name> : specify logo name (default: linux_logo)\n"

" -o <output> : output to file <output> instead of stdout\n"

" -t <type> : specify logo type, one of\n"

" mono : monochrome black/white\n"

" vga16 : 16 colors VGA text palette\n"

" clut224 : 224 colors (default)\n"

" gray256 : 256 levels grayscale\n"

"\n", programname);

}

int main(int argc, char *argv[])

{

int opt;

programname = argv[0];

opterr = 0;

while (1) {

opt = getopt(argc, argv, "hn:o:t:");

if (opt == -1)

break;

switch (opt) {

case 'h':

usage();

break;

case 'n':

logoname = optarg;

break;

case 'o':

outputname = optarg;

break;

case 't':

if (!strcmp(optarg, "mono"))

logo_type = LINUX_LOGO_MONO;

else if (!strcmp(optarg, "vga16"))

logo_type = LINUX_LOGO_VGA16;

else if (!strcmp(optarg, "clut224"))

logo_type = LINUX_LOGO_CLUT224;

else if (!strcmp(optarg, "gray256"))

logo_type = LINUX_LOGO_GRAY256;

else

usage();

break;

default:

usage();

break;

}

if (optind != argc-1)

usage();

filename = argv[optind];

read_image();

switch (logo_type) {

case LINUX_LOGO_MONO:

write_logo_mono();

break;

case LINUX_LOGO_VGA16:

write_logo_vga16();

break;

case LINUX_LOGO_CLUT224:

write_logo_clut224();

break;

case LINUX_LOGO_GRAY256:

write_logo_gray256();

break;

}

exit(0);

}

zeppelin_kernel/scripts/pnmtologo.c at master · turl/zeppelin_kernel · GitHub

Repository navigation

Expand file tree

Breadcrumbs

pnmtologo.c

Latest commit

History

Breadcrumbs

pnmtologo.c

File metadata and controls