| 1 |
/********************************************************************* |
| 2 |
|
| 3 |
png.c |
| 4 |
|
| 5 |
PNG reading functions. |
| 6 |
|
| 7 |
07/15/1998 Created by Mathis Rosenhauer |
| 8 |
10/02/1998 Code clean up and abstraction by Mike Balfour |
| 9 |
and Mathis Rosenhauer |
| 10 |
10/15/1998 Image filtering. MLR |
| 11 |
11/09/1998 Bit depths 1-8 MLR |
| 12 |
11/10/1998 Some additional PNG chunks recognized MLR |
| 13 |
05/14/1999 Color type 2 and PNG save functions added |
| 14 |
05/15/1999 Handle RGB555 while saving, use osd_fxxx |
| 15 |
functions for writing MSH |
| 16 |
04/27/2001 Simple MNG support MLR |
| 17 |
|
| 18 |
TODO : Fully comply with the "Recommendations for Decoders" |
| 19 |
of the W3C |
| 20 |
|
| 21 |
*********************************************************************/ |
| 22 |
|
| 23 |
#include <math.h> |
| 24 |
#include <zlib.h> |
| 25 |
#include "driver.h" |
| 26 |
#include "png.h" |
| 27 |
|
| 28 |
extern char build_version[]; |
| 29 |
extern UINT32 direct_rgb_components[3]; /* Used to determine the RGB layout in direct modes */ |
| 30 |
|
| 31 |
/* convert_uint is here so we don't have to deal with byte-ordering issues */ |
| 32 |
static UINT32 convert_from_network_order (UINT8 *v) |
| 33 |
{ |
| 34 |
UINT32 i; |
| 35 |
|
| 36 |
i = (v[0]<<24) | (v[1]<<16) | (v[2]<<8) | (v[3]); |
| 37 |
return i; |
| 38 |
} |
| 39 |
|
| 40 |
int png_unfilter(struct png_info *p) |
| 41 |
{ |
| 42 |
int i, j, bpp, filter; |
| 43 |
INT32 prediction, pA, pB, pC, dA, dB, dC; |
| 44 |
UINT8 *src, *dst; |
| 45 |
|
| 46 |
if((p->image = (UINT8 *)malloc (p->height*p->rowbytes))==NULL) |
| 47 |
{ |
| 48 |
logerror("Out of memory\n"); |
| 49 |
free (p->fimage); |
| 50 |
return 0; |
| 51 |
} |
| 52 |
|
| 53 |
src = p->fimage; |
| 54 |
dst = p->image; |
| 55 |
bpp = p->bpp; |
| 56 |
|
| 57 |
for (i=0; i<p->height; i++) |
| 58 |
{ |
| 59 |
filter = *src++; |
| 60 |
if (!filter) |
| 61 |
{ |
| 62 |
memcpy (dst, src, p->rowbytes); |
| 63 |
src += p->rowbytes; |
| 64 |
dst += p->rowbytes; |
| 65 |
} |
| 66 |
else |
| 67 |
for (j=0; j<p->rowbytes; j++) |
| 68 |
{ |
| 69 |
pA = (j<bpp) ? 0: *(dst - bpp); |
| 70 |
pB = (i<1) ? 0: *(dst - p->rowbytes); |
| 71 |
pC = ((j<bpp)||(i<1)) ? 0: *(dst - p->rowbytes - bpp); |
| 72 |
|
| 73 |
switch (filter) |
| 74 |
{ |
| 75 |
case PNG_PF_Sub: |
| 76 |
prediction = pA; |
| 77 |
break; |
| 78 |
case PNG_PF_Up: |
| 79 |
prediction = pB; |
| 80 |
break; |
| 81 |
case PNG_PF_Average: |
| 82 |
prediction = ((pA + pB) / 2); |
| 83 |
break; |
| 84 |
case PNG_PF_Paeth: |
| 85 |
prediction = pA + pB - pC; |
| 86 |
dA = abs(prediction - pA); |
| 87 |
dB = abs(prediction - pB); |
| 88 |
dC = abs(prediction - pC); |
| 89 |
if (dA <= dB && dA <= dC) prediction = pA; |
| 90 |
else if (dB <= dC) prediction = pB; |
| 91 |
else prediction = pC; |
| 92 |
break; |
| 93 |
default: |
| 94 |
logerror("Unknown filter type %i\n",filter); |
| 95 |
prediction = 0; |
| 96 |
} |
| 97 |
*dst = 0xff & (*src + prediction); |
| 98 |
dst++; src++; |
| 99 |
} |
| 100 |
} |
| 101 |
|
| 102 |
free (p->fimage); |
| 103 |
return 1; |
| 104 |
} |
| 105 |
|
| 106 |
int png_verify_signature (void *fp) |
| 107 |
{ |
| 108 |
INT8 signature[8]; |
| 109 |
|
| 110 |
if (osd_fread (fp, signature, 8) != 8) |
| 111 |
{ |
| 112 |
logerror("Unable to read PNG signature (EOF)\n"); |
| 113 |
return 0; |
| 114 |
} |
| 115 |
|
| 116 |
if (memcmp(signature, PNG_Signature, 8)) |
| 117 |
{ |
| 118 |
logerror("PNG signature mismatch found: %s expected: %s\n",signature,PNG_Signature); |
| 119 |
return 0; |
| 120 |
} |
| 121 |
return 1; |
| 122 |
} |
| 123 |
|
| 124 |
int png_inflate_image (struct png_info *p) |
| 125 |
{ |
| 126 |
unsigned long fbuff_size; |
| 127 |
|
| 128 |
fbuff_size = p->height * (p->rowbytes + 1); |
| 129 |
|
| 130 |
if((p->fimage = (UINT8 *)malloc (fbuff_size))==NULL) |
| 131 |
{ |
| 132 |
logerror("Out of memory\n"); |
| 133 |
free (p->zimage); |
| 134 |
return 0; |
| 135 |
} |
| 136 |
|
| 137 |
if (uncompress(p->fimage, &fbuff_size, p->zimage, p->zlength) != Z_OK) |
| 138 |
{ |
| 139 |
logerror("Error while inflating image\n"); |
| 140 |
return 0; |
| 141 |
} |
| 142 |
|
| 143 |
free (p->zimage); |
| 144 |
return 1; |
| 145 |
} |
| 146 |
|
| 147 |
int png_read_file(void *fp, struct png_info *p) |
| 148 |
{ |
| 149 |
/* translates color_type to bytes per pixel */ |
| 150 |
const int samples[] = {1, 0, 3, 1, 2, 0, 4}; |
| 151 |
|
| 152 |
UINT32 chunk_length, chunk_type=0, chunk_crc, crc; |
| 153 |
UINT8 *chunk_data, *temp; |
| 154 |
UINT8 str_chunk_type[5], v[4]; |
| 155 |
|
| 156 |
struct idat |
| 157 |
{ |
| 158 |
struct idat *next; |
| 159 |
int length; |
| 160 |
UINT8 *data; |
| 161 |
} *ihead, *pidat; |
| 162 |
|
| 163 |
if ((ihead = malloc (sizeof(struct idat))) == 0) |
| 164 |
return 0; |
| 165 |
|
| 166 |
pidat = ihead; |
| 167 |
|
| 168 |
p->zlength = 0; |
| 169 |
p->num_palette = 0; |
| 170 |
p->num_trans = 0; |
| 171 |
p->trans = NULL; |
| 172 |
p->palette = NULL; |
| 173 |
|
| 174 |
if (png_verify_signature(fp)==0) |
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return 0; |
| 176 |
|
| 177 |
while (chunk_type != PNG_CN_IEND) |
| 178 |
{ |
| 179 |
if (osd_fread(fp, v, 4) != 4) |
| 180 |
logerror("Unexpected EOF in PNG\n"); |
| 181 |
chunk_length=convert_from_network_order(v); |
| 182 |
|
| 183 |
if (osd_fread(fp, str_chunk_type, 4) != 4) |
| 184 |
logerror("Unexpected EOF in PNG file\n"); |
| 185 |
|
| 186 |
str_chunk_type[4]=0; /* terminate string */ |
| 187 |
|
| 188 |
crc=crc32(0,str_chunk_type, 4); |
| 189 |
chunk_type = convert_from_network_order(str_chunk_type); |
| 190 |
|
| 191 |
if (chunk_length) |
| 192 |
{ |
| 193 |
if ((chunk_data = (UINT8 *)malloc(chunk_length+1))==NULL) |
| 194 |
{ |
| 195 |
logerror("Out of memory\n"); |
| 196 |
return 0; |
| 197 |
} |
| 198 |
if (osd_fread (fp, chunk_data, chunk_length) != chunk_length) |
| 199 |
{ |
| 200 |
logerror("Unexpected EOF in PNG file\n"); |
| 201 |
free(chunk_data); |
| 202 |
return 0; |
| 203 |
} |
| 204 |
|
| 205 |
crc=crc32(crc,chunk_data, chunk_length); |
| 206 |
} |
| 207 |
else |
| 208 |
chunk_data = NULL; |
| 209 |
|
| 210 |
if (osd_fread(fp, v, 4) != 4) |
| 211 |
logerror("Unexpected EOF in PNG\n"); |
| 212 |
chunk_crc=convert_from_network_order(v); |
| 213 |
|
| 214 |
if (crc != chunk_crc) |
| 215 |
{ |
| 216 |
logerror("CRC check failed while reading PNG chunk %s\n",str_chunk_type); |
| 217 |
logerror("Found: %08X Expected: %08X\n",crc,chunk_crc); |
| 218 |
return 0; |
| 219 |
} |
| 220 |
|
| 221 |
logerror("Reading PNG chunk %s\n", str_chunk_type); |
| 222 |
|
| 223 |
switch (chunk_type) |
| 224 |
{ |
| 225 |
case PNG_CN_IHDR: |
| 226 |
p->width = convert_from_network_order(chunk_data); |
| 227 |
p->height = convert_from_network_order(chunk_data+4); |
| 228 |
p->bit_depth = *(chunk_data+8); |
| 229 |
p->color_type = *(chunk_data+9); |
| 230 |
p->compression_method = *(chunk_data+10); |
| 231 |
p->filter_method = *(chunk_data+11); |
| 232 |
p->interlace_method = *(chunk_data+12); |
| 233 |
free (chunk_data); |
| 234 |
|
| 235 |
logerror("PNG IHDR information:\n"); |
| 236 |
logerror("Width: %i, Height: %i\n", p->width, p->height); |
| 237 |
logerror("Bit depth %i, color type: %i\n", p->bit_depth, p->color_type); |
| 238 |
logerror("Compression method: %i, filter: %i, interlace: %i\n", |
| 239 |
p->compression_method, p->filter_method, p->interlace_method); |
| 240 |
break; |
| 241 |
|
| 242 |
case PNG_CN_PLTE: |
| 243 |
p->num_palette=chunk_length/3; |
| 244 |
p->palette=chunk_data; |
| 245 |
logerror("%i palette entries\n", p->num_palette); |
| 246 |
break; |
| 247 |
|
| 248 |
case PNG_CN_tRNS: |
| 249 |
p->num_trans=chunk_length; |
| 250 |
p->trans=chunk_data; |
| 251 |
logerror("%i transparent palette entries\n", p->num_trans); |
| 252 |
break; |
| 253 |
|
| 254 |
case PNG_CN_IDAT: |
| 255 |
pidat->data = chunk_data; |
| 256 |
pidat->length = chunk_length; |
| 257 |
if ((pidat->next = malloc (sizeof(struct idat))) == 0) |
| 258 |
return 0; |
| 259 |
pidat = pidat->next; |
| 260 |
pidat->next = 0; |
| 261 |
p->zlength += chunk_length; |
| 262 |
break; |
| 263 |
|
| 264 |
case PNG_CN_tEXt: |
| 265 |
{ |
| 266 |
char *text = (char *)chunk_data; |
| 267 |
|
| 268 |
while(*text++) ; |
| 269 |
chunk_data[chunk_length]=0; |
| 270 |
logerror("Keyword: %s\n", chunk_data); |
| 271 |
logerror("Text: %s\n", text); |
| 272 |
} |
| 273 |
free(chunk_data); |
| 274 |
break; |
| 275 |
|
| 276 |
case PNG_CN_tIME: |
| 277 |
{ |
| 278 |
UINT8 *t=chunk_data; |
| 279 |
logerror("Image last-modification time: %i/%i/%i (%i:%i:%i) GMT\n", |
| 280 |
((short)(*t) << 8)+ (short)(*(t+1)), *(t+2), *(t+3), *(t+4), *(t+5), *(t+6)); |
| 281 |
} |
| 282 |
|
| 283 |
free(chunk_data); |
| 284 |
break; |
| 285 |
|
| 286 |
case PNG_CN_gAMA: |
| 287 |
p->source_gamma = convert_from_network_order(chunk_data)/100000.0; |
| 288 |
logerror( "Source gamma: %f\n",p->source_gamma); |
| 289 |
|
| 290 |
free(chunk_data); |
| 291 |
break; |
| 292 |
|
| 293 |
case PNG_CN_pHYs: |
| 294 |
p->xres = convert_from_network_order(chunk_data); |
| 295 |
p->yres = convert_from_network_order(chunk_data+4); |
| 296 |
p->resolution_unit = *(chunk_data+8); |
| 297 |
logerror("Pixel per unit, X axis: %i\n",p->xres); |
| 298 |
logerror("Pixel per unit, Y axis: %i\n",p->yres); |
| 299 |
if (p->resolution_unit) |
| 300 |
logerror("Unit is meter\n"); |
| 301 |
else |
| 302 |
logerror("Unit is unknown\n"); |
| 303 |
free(chunk_data); |
| 304 |
break; |
| 305 |
|
| 306 |
case PNG_CN_IEND: |
| 307 |
break; |
| 308 |
|
| 309 |
default: |
| 310 |
if (chunk_type & 0x20000000) |
| 311 |
logerror("Ignoring ancillary chunk %s\n",str_chunk_type); |
| 312 |
else |
| 313 |
logerror("Ignoring critical chunk %s!\n",str_chunk_type); |
| 314 |
if (chunk_data) |
| 315 |
free(chunk_data); |
| 316 |
break; |
| 317 |
} |
| 318 |
} |
| 319 |
if ((p->zimage = (UINT8 *)malloc(p->zlength))==NULL) |
| 320 |
{ |
| 321 |
logerror("Out of memory\n"); |
| 322 |
return 0; |
| 323 |
} |
| 324 |
|
| 325 |
/* combine idat chunks to compressed image data */ |
| 326 |
temp = p->zimage; |
| 327 |
while (ihead->next) |
| 328 |
{ |
| 329 |
pidat = ihead; |
| 330 |
memcpy (temp, pidat->data, pidat->length); |
| 331 |
free (pidat->data); |
| 332 |
temp += pidat->length; |
| 333 |
ihead = pidat->next; |
| 334 |
free (pidat); |
| 335 |
} |
| 336 |
p->bpp = (samples[p->color_type] * p->bit_depth) / 8; |
| 337 |
p->rowbytes = ceil((p->width * p->bit_depth * samples[p->color_type]) / 8.0); |
| 338 |
|
| 339 |
if (png_inflate_image(p)==0) |
| 340 |
return 0; |
| 341 |
|
| 342 |
if(png_unfilter (p)==0) |
| 343 |
return 0; |
| 344 |
|
| 345 |
return 1; |
| 346 |
} |
| 347 |
|
| 348 |
int png_read_info(void *fp, struct png_info *p) |
| 349 |
{ |
| 350 |
UINT32 chunk_length, chunk_type=0, chunk_crc, crc; |
| 351 |
UINT8 *chunk_data; |
| 352 |
UINT8 str_chunk_type[5], v[4]; |
| 353 |
int res = 0; |
| 354 |
|
| 355 |
if (png_verify_signature(fp)==0) |
| 356 |
return 0; |
| 357 |
|
| 358 |
while (chunk_type != PNG_CN_IEND) |
| 359 |
{ |
| 360 |
if (osd_fread(fp, v, 4) != 4) |
| 361 |
logerror("Unexpected EOF in PNG\n"); |
| 362 |
chunk_length=convert_from_network_order(v); |
| 363 |
|
| 364 |
if (osd_fread(fp, str_chunk_type, 4) != 4) |
| 365 |
logerror("Unexpected EOF in PNG file\n"); |
| 366 |
|
| 367 |
str_chunk_type[4]=0; /* terminate string */ |
| 368 |
|
| 369 |
crc=crc32(0,str_chunk_type, 4); |
| 370 |
chunk_type = convert_from_network_order(str_chunk_type); |
| 371 |
|
| 372 |
if (chunk_length) |
| 373 |
{ |
| 374 |
if ((chunk_data = (UINT8 *)malloc(chunk_length+1))==NULL) |
| 375 |
{ |
| 376 |
logerror("Out of memory\n"); |
| 377 |
return 0; |
| 378 |
} |
| 379 |
if (osd_fread (fp, chunk_data, chunk_length) != chunk_length) |
| 380 |
{ |
| 381 |
logerror("Unexpected EOF in PNG file\n"); |
| 382 |
free(chunk_data); |
| 383 |
return 0; |
| 384 |
} |
| 385 |
|
| 386 |
crc=crc32(crc,chunk_data, chunk_length); |
| 387 |
} |
| 388 |
else |
| 389 |
chunk_data = NULL; |
| 390 |
|
| 391 |
if (osd_fread(fp, v, 4) != 4) |
| 392 |
logerror("Unexpected EOF in PNG\n"); |
| 393 |
chunk_crc=convert_from_network_order(v); |
| 394 |
|
| 395 |
if (crc != chunk_crc) |
| 396 |
{ |
| 397 |
logerror("CRC check failed while reading PNG chunk %s\n",str_chunk_type); |
| 398 |
logerror("Found: %08X Expected: %08X\n",crc,chunk_crc); |
| 399 |
return 0; |
| 400 |
} |
| 401 |
|
| 402 |
logerror("Reading PNG chunk %s\n", str_chunk_type); |
| 403 |
|
| 404 |
switch (chunk_type) |
| 405 |
{ |
| 406 |
case PNG_CN_IHDR: |
| 407 |
p->width = convert_from_network_order(chunk_data); |
| 408 |
p->height = convert_from_network_order(chunk_data+4); |
| 409 |
p->bit_depth = *(chunk_data+8); |
| 410 |
p->color_type = *(chunk_data+9); |
| 411 |
p->compression_method = *(chunk_data+10); |
| 412 |
p->filter_method = *(chunk_data+11); |
| 413 |
p->interlace_method = *(chunk_data+12); |
| 414 |
free (chunk_data); |
| 415 |
|
| 416 |
logerror("PNG IHDR information:\n"); |
| 417 |
logerror("Width: %i, Height: %i\n", p->width, p->height); |
| 418 |
logerror("Bit depth %i, color type: %i\n", p->bit_depth, p->color_type); |
| 419 |
logerror("Compression method: %i, filter: %i, interlace: %i\n", |
| 420 |
p->compression_method, p->filter_method, p->interlace_method); |
| 421 |
break; |
| 422 |
|
| 423 |
case PNG_CN_tEXt: |
| 424 |
{ |
| 425 |
char *text = (char *)chunk_data; |
| 426 |
int c; |
| 427 |
|
| 428 |
while(*text++) ; |
| 429 |
chunk_data[chunk_length]=0; |
| 430 |
if (strcmp ((const char *)chunk_data, "Screen") == 0) |
| 431 |
{ |
| 432 |
c = sscanf (text, "%i%i%i%i", &p->screen.min_x, &p->screen.max_x, |
| 433 |
&p->screen.min_y, &p->screen.max_y); |
| 434 |
if (c == 4) |
| 435 |
{ |
| 436 |
res = 1; |
| 437 |
logerror("Screen location found at %i, %i, %i, %i\n", |
| 438 |
p->screen.min_x, p->screen.max_x, |
| 439 |
p->screen.min_y, p->screen.max_y); |
| 440 |
} |
| 441 |
else |
| 442 |
logerror("Invalid %s value %s\n", chunk_data, text); |
| 443 |
} |
| 444 |
} |
| 445 |
free(chunk_data); |
| 446 |
break; |
| 447 |
|
| 448 |
default: |
| 449 |
if (chunk_data) |
| 450 |
free(chunk_data); |
| 451 |
break; |
| 452 |
} |
| 453 |
} |
| 454 |
return res; |
| 455 |
} |
| 456 |
|
| 457 |
/* Expands a p->image from p->bit_depth to 8 bit */ |
| 458 |
int png_expand_buffer_8bit (struct png_info *p) |
| 459 |
{ |
| 460 |
int i,j, k; |
| 461 |
UINT8 *inp, *outp, *outbuf; |
| 462 |
|
| 463 |
if (p->bit_depth < 8) |
| 464 |
{ |
| 465 |
if ((outbuf = (UINT8 *)malloc(p->width*p->height))==NULL) |
| 466 |
{ |
| 467 |
logerror("Out of memory\n"); |
| 468 |
return 0; |
| 469 |
} |
| 470 |
|
| 471 |
inp = p->image; |
| 472 |
outp = outbuf; |
| 473 |
|
| 474 |
for (i = 0; i < p->height; i++) |
| 475 |
{ |
| 476 |
for(j = 0; j < p->width / ( 8 / p->bit_depth); j++) |
| 477 |
{ |
| 478 |
for (k = 8 / p->bit_depth-1; k >= 0; k--) |
| 479 |
*outp++ = (*inp >> k * p->bit_depth) & (0xff >> (8 - p->bit_depth)); |
| 480 |
inp++; |
| 481 |
} |
| 482 |
if (p->width % (8 / p->bit_depth)) |
| 483 |
{ |
| 484 |
for (k = p->width % (8 / p->bit_depth)-1; k >= 0; k--) |
| 485 |
*outp++ = (*inp >> k * p->bit_depth) & (0xff >> (8 - p->bit_depth)); |
| 486 |
inp++; |
| 487 |
} |
| 488 |
} |
| 489 |
free (p->image); |
| 490 |
p->image = outbuf; |
| 491 |
} |
| 492 |
return 1; |
| 493 |
} |
| 494 |
|
| 495 |
void png_delete_unused_colors (struct png_info *p) |
| 496 |
{ |
| 497 |
int i, tab[256], pen=0, trns=0; |
| 498 |
UINT8 ptemp[3*256], ttemp[256]; |
| 499 |
|
| 500 |
memset (tab, 0, 256*sizeof(int)); |
| 501 |
memcpy (ptemp, p->palette, 3*p->num_palette); |
| 502 |
memcpy (ttemp, p->trans, p->num_trans); |
| 503 |
|
| 504 |
/* check which colors are actually used */ |
| 505 |
for (i = 0; i < p->height*p->width; i++) |
| 506 |
tab[p->image[i]]++; |
| 507 |
|
| 508 |
/* shrink palette and transparency */ |
| 509 |
for (i = 0; i < p->num_palette; i++) |
| 510 |
if (tab[i]) |
| 511 |
{ |
| 512 |
p->palette[3*pen+0]=ptemp[3*i+0]; |
| 513 |
p->palette[3*pen+1]=ptemp[3*i+1]; |
| 514 |
p->palette[3*pen+2]=ptemp[3*i+2]; |
| 515 |
if (i < p->num_trans) |
| 516 |
{ |
| 517 |
p->trans[pen] = ttemp[i]; |
| 518 |
trns++; |
| 519 |
} |
| 520 |
tab[i] = pen++; |
| 521 |
} |
| 522 |
|
| 523 |
/* remap colors */ |
| 524 |
for (i = 0; i < p->height*p->width; i++) |
| 525 |
p->image[i]=tab[p->image[i]]; |
| 526 |
|
| 527 |
if (p->num_palette!=pen) |
| 528 |
logerror("%i unused pen(s) deleted\n", p->num_palette-pen); |
| 529 |
|
| 530 |
p->num_palette = pen; |
| 531 |
p->num_trans = trns; |
| 532 |
} |
| 533 |
|
| 534 |
/******************************************************************************** |
| 535 |
|
| 536 |
PNG write functions |
| 537 |
|
| 538 |
********************************************************************************/ |
| 539 |
|
| 540 |
struct png_text |
| 541 |
{ |
| 542 |
char *data; |
| 543 |
int length; |
| 544 |
struct png_text *next; |
| 545 |
}; |
| 546 |
|
| 547 |
static struct png_text *png_text_list = 0; |
| 548 |
|
| 549 |
static void convert_to_network_order (UINT32 i, UINT8 *v) |
| 550 |
{ |
| 551 |
v[0]=i>>24; |
| 552 |
v[1]=(i>>16)&0xff; |
| 553 |
v[2]=(i>>8)&0xff; |
| 554 |
v[3]=i&0xff; |
| 555 |
} |
| 556 |
|
| 557 |
int png_add_text (const char *keyword, const char *text) |
| 558 |
{ |
| 559 |
struct png_text *pt; |
| 560 |
|
| 561 |
pt = malloc (sizeof(struct png_text)); |
| 562 |
if (pt == 0) |
| 563 |
return 0; |
| 564 |
|
| 565 |
pt->length = strlen(keyword) + strlen(text) + 1; |
| 566 |
pt->data = malloc (pt->length + 1); |
| 567 |
if (pt->data == 0) |
| 568 |
return 0; |
| 569 |
|
| 570 |
strcpy (pt->data, keyword); |
| 571 |
strcpy (pt->data + strlen(keyword) + 1, text); |
| 572 |
pt->next = png_text_list; |
| 573 |
png_text_list = pt; |
| 574 |
|
| 575 |
return 1; |
| 576 |
} |
| 577 |
|
| 578 |
static int write_chunk(void *fp, UINT32 chunk_type, UINT8 *chunk_data, UINT32 chunk_length) |
| 579 |
{ |
| 580 |
UINT32 crc; |
| 581 |
UINT8 v[4]; |
| 582 |
int written; |
| 583 |
|
| 584 |
/* write length */ |
| 585 |
convert_to_network_order(chunk_length, v); |
| 586 |
written = osd_fwrite(fp, v, 4); |
| 587 |
|
| 588 |
/* write type */ |
| 589 |
convert_to_network_order(chunk_type, v); |
| 590 |
written += osd_fwrite(fp, v, 4); |
| 591 |
|
| 592 |
/* calculate crc */ |
| 593 |
crc=crc32(0, v, 4); |
| 594 |
if (chunk_length > 0) |
| 595 |
{ |
| 596 |
/* write data */ |
| 597 |
written += osd_fwrite(fp, chunk_data, chunk_length); |
| 598 |
crc=crc32(crc, chunk_data, chunk_length); |
| 599 |
} |
| 600 |
convert_to_network_order(crc, v); |
| 601 |
|
| 602 |
/* write crc */ |
| 603 |
written += osd_fwrite(fp, v, 4); |
| 604 |
|
| 605 |
if (written != 3*4+chunk_length) |
| 606 |
{ |
| 607 |
logerror("Chunk write failed\n"); |
| 608 |
return 0; |
| 609 |
} |
| 610 |
return 1; |
| 611 |
} |
| 612 |
|
| 613 |
int png_write_sig(void *fp) |
| 614 |
{ |
| 615 |
/* PNG Signature */ |
| 616 |
if (osd_fwrite(fp, PNG_Signature, 8) != 8) |
| 617 |
{ |
| 618 |
logerror("PNG sig write failed\n"); |
| 619 |
return 0; |
| 620 |
} |
| 621 |
return 1; |
| 622 |
} |
| 623 |
|
| 624 |
int png_write_datastream(void *fp, struct png_info *p) |
| 625 |
{ |
| 626 |
UINT8 ihdr[13]; |
| 627 |
struct png_text *pt; |
| 628 |
|
| 629 |
/* IHDR */ |
| 630 |
convert_to_network_order(p->width, ihdr); |
| 631 |
convert_to_network_order(p->height, ihdr+4); |
| 632 |
*(ihdr+8) = p->bit_depth; |
| 633 |
*(ihdr+9) = p->color_type; |
| 634 |
*(ihdr+10) = p->compression_method; |
| 635 |
*(ihdr+11) = p->filter_method; |
| 636 |
*(ihdr+12) = p->interlace_method; |
| 637 |
logerror("Type(%d) Color Depth(%d)\n", p->color_type,p->bit_depth); |
| 638 |
if (write_chunk(fp, PNG_CN_IHDR, ihdr, 13)==0) |
| 639 |
return 0; |
| 640 |
|
| 641 |
/* PLTE */ |
| 642 |
if (p->num_palette > 0) |
| 643 |
if (write_chunk(fp, PNG_CN_PLTE, p->palette, p->num_palette*3)==0) |
| 644 |
return 0; |
| 645 |
|
| 646 |
/* IDAT */ |
| 647 |
if (write_chunk(fp, PNG_CN_IDAT, p->zimage, p->zlength)==0) |
| 648 |
return 0; |
| 649 |
|
| 650 |
/* tEXt */ |
| 651 |
while (png_text_list) |
| 652 |
{ |
| 653 |
pt = png_text_list; |
| 654 |
if (write_chunk(fp, PNG_CN_tEXt, (UINT8 *)pt->data, pt->length)==0) |
| 655 |
return 0; |
| 656 |
free (pt->data); |
| 657 |
|
| 658 |
png_text_list = pt->next; |
| 659 |
free (pt); |
| 660 |
} |
| 661 |
|
| 662 |
/* IEND */ |
| 663 |
if (write_chunk(fp, PNG_CN_IEND, NULL, 0)==0) |
| 664 |
return 0; |
| 665 |
|
| 666 |
return 1; |
| 667 |
} |
| 668 |
|
| 669 |
int png_filter(struct png_info *p) |
| 670 |
{ |
| 671 |
int i; |
| 672 |
UINT8 *src, *dst; |
| 673 |
|
| 674 |
if((p->fimage = (UINT8 *)malloc (p->height*(p->rowbytes+1)))==NULL) |
| 675 |
{ |
| 676 |
logerror("Out of memory\n"); |
| 677 |
return 0; |
| 678 |
} |
| 679 |
|
| 680 |
dst = p->fimage; |
| 681 |
src = p->image; |
| 682 |
|
| 683 |
for (i=0; i<p->height; i++) |
| 684 |
{ |
| 685 |
*dst++ = 0; /* No filter */ |
| 686 |
memcpy (dst, src, p->rowbytes); |
| 687 |
src += p->rowbytes; |
| 688 |
dst += p->rowbytes; |
| 689 |
} |
| 690 |
return 1; |
| 691 |
} |
| 692 |
|
| 693 |
int png_deflate_image(struct png_info *p) |
| 694 |
{ |
| 695 |
unsigned long zbuff_size; |
| 696 |
|
| 697 |
zbuff_size = (p->height*(p->rowbytes+1))*1.1+12; |
| 698 |
|
| 699 |
if((p->zimage = (UINT8 *)malloc (zbuff_size))==NULL) |
| 700 |
{ |
| 701 |
logerror("Out of memory\n"); |
| 702 |
return 0; |
| 703 |
} |
| 704 |
|
| 705 |
if (compress(p->zimage, &zbuff_size, p->fimage, p->height*(p->rowbytes+1)) != Z_OK) |
| 706 |
{ |
| 707 |
logerror("Error while deflating image\n"); |
| 708 |
return 0; |
| 709 |
} |
| 710 |
p->zlength = zbuff_size; |
| 711 |
|
| 712 |
return 1; |
| 713 |
} |
| 714 |
|
| 715 |
static int png_pack_buffer (struct png_info *p) |
| 716 |
{ |
| 717 |
UINT8 *outp, *inp; |
| 718 |
int i,j,k; |
| 719 |
|
| 720 |
outp = inp = p->image; |
| 721 |
|
| 722 |
if (p->bit_depth < 8) |
| 723 |
{ |
| 724 |
for (i=0; i<p->height; i++) |
| 725 |
{ |
| 726 |
for(j=0; j<p->width/(8/p->bit_depth); j++) |
| 727 |
{ |
| 728 |
for (k=8/p->bit_depth-1; k>=0; k--) |
| 729 |
*outp |= *inp++ << k * p->bit_depth; |
| 730 |
outp++; |
| 731 |
*outp = 0; |
| 732 |
} |
| 733 |
if (p->width % (8/p->bit_depth)) |
| 734 |
{ |
| 735 |
for (k=p->width%(8/p->bit_depth)-1; k>=0; k--) |
| 736 |
*outp |= *inp++ << k * p->bit_depth; |
| 737 |
outp++; |
| 738 |
*outp = 0; |
| 739 |
} |
| 740 |
} |
| 741 |
} |
| 742 |
return 1; |
| 743 |
} |
| 744 |
|
| 745 |
|
| 746 |
/********************************************************************* |
| 747 |
|
| 748 |
Writes an mame_bitmap in a PNG file. If the depth of the bitmap |
| 749 |
is 8, a color type 3 PNG with palette is written. Otherwise a |
| 750 |
color type 2 true color RGB PNG is written. |
| 751 |
|
| 752 |
*********************************************************************/ |
| 753 |
|
| 754 |
static int png_create_datastream(void *fp, struct mame_bitmap *bitmap) |
| 755 |
{ |
| 756 |
int i, j; |
| 757 |
int r, g, b; |
| 758 |
UINT32 color; |
| 759 |
UINT8 *ip; |
| 760 |
struct png_info p; |
| 761 |
|
| 762 |
memset (&p, 0, sizeof (struct png_info)); |
| 763 |
p.xscale = p.yscale = p.source_gamma = 0.0; |
| 764 |
p.palette = p.trans = p.image = p.zimage = p.fimage = NULL; |
| 765 |
p.width = bitmap->width; |
| 766 |
p.height = bitmap->height; |
| 767 |
|
| 768 |
if ((Machine->color_depth == 16) && (Machine->drv->total_colors <= 256)) |
| 769 |
{ |
| 770 |
p.color_type = 3; |
| 771 |
if((p.palette = (UINT8 *)malloc (3*256))==NULL) |
| 772 |
{ |
| 773 |
logerror("Out of memory\n"); |
| 774 |
return 0; |
| 775 |
} |
| 776 |
memset (p.palette, 0, 3*256); |
| 777 |
/* get palette */ |
| 778 |
for (i = 0; i < Machine->drv->total_colors; i++) |
| 779 |
palette_get_color(i,&p.palette[3*i],&p.palette[3*i+1],&p.palette[3*i+2]); |
| 780 |
|
| 781 |
p.num_palette = 256; |
| 782 |
if((p.image = (UINT8 *)malloc (p.height*p.width))==NULL) |
| 783 |
{ |
| 784 |
logerror("Out of memory\n"); |
| 785 |
return 0; |
| 786 |
} |
| 787 |
|
| 788 |
for (i = 0; i < p.height; i++) |
| 789 |
for (j = 0; j < p.width; j++) |
| 790 |
p.image[i * p.width + j] = ((UINT16 *)bitmap->line[i])[j]; |
| 791 |
|
| 792 |
png_delete_unused_colors (&p); |
| 793 |
p.bit_depth = p.num_palette > 16 ? 8 : p.num_palette > 4 ? 4 : p.num_palette > 2 ? 2 : 1; |
| 794 |
p.rowbytes=ceil((p.width*p.bit_depth)/8.0); |
| 795 |
if (png_pack_buffer (&p) == 0) |
| 796 |
return 0; |
| 797 |
|
| 798 |
} |
| 799 |
else |
| 800 |
{ |
| 801 |
p.color_type = 2; |
| 802 |
p.rowbytes = p.width * 3; |
| 803 |
p.bit_depth = 8; |
| 804 |
if((p.image = (UINT8 *)malloc (p.height * p.rowbytes))==NULL) |
| 805 |
{ |
| 806 |
logerror("Out of memory\n"); |
| 807 |
return 0; |
| 808 |
} |
| 809 |
|
| 810 |
ip = p.image; |
| 811 |
|
| 812 |
switch (Machine->color_depth) |
| 813 |
{ |
| 814 |
case 16: /* 16BIT */ |
| 815 |
for (i = 0; i < p.height; i++) |
| 816 |
for (j = 0; j < p.width; j++) |
| 817 |
{ |
| 818 |
palette_get_color(((UINT16 *)bitmap->line[i])[j],ip, ip+1, ip+2); |
| 819 |
ip += 3; |
| 820 |
} |
| 821 |
break; |
| 822 |
case 15: /* DIRECT_15BIT */ |
| 823 |
for (i = 0; i < p.height; i++) |
| 824 |
for (j = 0; j < p.width; j++) |
| 825 |
{ |
| 826 |
color = ((UINT16 *)bitmap->line[i])[j]; |
| 827 |
|
| 828 |
r = (color & direct_rgb_components[0]) / (direct_rgb_components[0] / 0x1f); |
| 829 |
g = (color & direct_rgb_components[1]) / (direct_rgb_components[1] / 0x1f); |
| 830 |
b = (color & direct_rgb_components[2]) / (direct_rgb_components[2] / 0x1f); |
| 831 |
|
| 832 |
*ip++ = (r << 3) | (r >> 2); |
| 833 |
*ip++ = (g << 3) | (g >> 2); |
| 834 |
*ip++ = (b << 3) | (b >> 2); |
| 835 |
} |
| 836 |
break; |
| 837 |
case 32: /* DIRECT_32BIT */ |
| 838 |
for (i = 0; i < p.height; i++) |
| 839 |
for (j = 0; j < p.width; j++) |
| 840 |
{ |
| 841 |
color = ((UINT32 *)bitmap->line[i])[j]; |
| 842 |
|
| 843 |
r = (color & direct_rgb_components[0]) / (direct_rgb_components[0] / 0xff); |
| 844 |
g = (color & direct_rgb_components[1]) / (direct_rgb_components[1] / 0xff); |
| 845 |
b = (color & direct_rgb_components[2]) / (direct_rgb_components[2] / 0xff); |
| 846 |
|
| 847 |
*ip++ = r; |
| 848 |
*ip++ = g; |
| 849 |
*ip++ = b; |
| 850 |
} |
| 851 |
break; |
| 852 |
default: |
| 853 |
logerror("Unknown color depth\n"); |
| 854 |
break; |
| 855 |
} |
| 856 |
} |
| 857 |
if(png_filter (&p)==0) |
| 858 |
return 0; |
| 859 |
|
| 860 |
if (png_deflate_image(&p)==0) |
| 861 |
return 0; |
| 862 |
|
| 863 |
if (png_write_datastream(fp, &p)==0) |
| 864 |
return 0; |
| 865 |
|
| 866 |
if (p.palette) free (p.palette); |
| 867 |
if (p.image) free (p.image); |
| 868 |
if (p.zimage) free (p.zimage); |
| 869 |
if (p.fimage) free (p.fimage); |
| 870 |
return 1; |
| 871 |
} |
| 872 |
|
| 873 |
int png_write_bitmap(void *fp, struct mame_bitmap *bitmap) |
| 874 |
{ |
| 875 |
char text[1024]; |
| 876 |
|
| 877 |
#ifdef MESS |
| 878 |
sprintf (text, "MESS %s", build_version); |
| 879 |
#else |
| 880 |
sprintf (text, "MAME %s", build_version); |
| 881 |
#endif |
| 882 |
png_add_text("Software", text); |
| 883 |
sprintf (text, "%s %s", Machine->gamedrv->manufacturer, Machine->gamedrv->description); |
| 884 |
png_add_text("System", text); |
| 885 |
|
| 886 |
if(png_write_sig(fp) == 0) |
| 887 |
return 0; |
| 888 |
|
| 889 |
if(png_create_datastream(fp, bitmap) == 0) |
| 890 |
return 0; |
| 891 |
|
| 892 |
return 1; |
| 893 |
} |
| 894 |
|
| 895 |
/******************************************************************************** |
| 896 |
|
| 897 |
MNG write functions |
| 898 |
|
| 899 |
********************************************************************************/ |
| 900 |
|
| 901 |
static int mng_status; |
| 902 |
|
| 903 |
int mng_capture_start(void *fp, struct mame_bitmap *bitmap) |
| 904 |
{ |
| 905 |
UINT8 mhdr[28]; |
| 906 |
/* UINT8 term; */ |
| 907 |
|
| 908 |
if (osd_fwrite(fp, MNG_Signature, 8) != 8) |
| 909 |
{ |
| 910 |
logerror("MNG sig write failed\n"); |
| 911 |
return 0; |
| 912 |
} |
| 913 |
|
| 914 |
memset (mhdr, 0, 28); |
| 915 |
convert_to_network_order(bitmap->width, mhdr); |
| 916 |
convert_to_network_order(bitmap->height, mhdr+4); |
| 917 |
convert_to_network_order(Machine->drv->frames_per_second, mhdr+8); |
| 918 |
convert_to_network_order(0x0041, mhdr+24); /* Simplicity profile */ |
| 919 |
/* frame count and play time unspecified because |
| 920 |
we don't know at this stage */ |
| 921 |
if (write_chunk(fp, MNG_CN_MHDR, mhdr, 28)==0) |
| 922 |
return 0; |
| 923 |
|
| 924 |
/* term = 0x03; loop sequence */ |
| 925 |
/* if (write_chunk(fp, MNG_CN_TERM, &term, 1)==0) */ |
| 926 |
/* return 0; */ |
| 927 |
|
| 928 |
mng_status = 1; |
| 929 |
return 1; |
| 930 |
} |
| 931 |
|
| 932 |
int mng_capture_frame(void *fp, struct mame_bitmap *bitmap) |
| 933 |
{ |
| 934 |
if (mng_status) |
| 935 |
{ |
| 936 |
if(png_create_datastream(fp, bitmap) == 0) |
| 937 |
return 0; |
| 938 |
return 1; |
| 939 |
} |
| 940 |
else |
| 941 |
{ |
| 942 |
logerror("MNG recording not running\n"); |
| 943 |
return 0; |
| 944 |
} |
| 945 |
} |
| 946 |
|
| 947 |
int mng_capture_stop(void *fp) |
| 948 |
{ |
| 949 |
if (write_chunk(fp, MNG_CN_MEND, NULL, 0)==0) |
| 950 |
return 0; |
| 951 |
|
| 952 |
mng_status = 0; |
| 953 |
return 1; |
| 954 |
} |
| 955 |
|
| 956 |
int mng_capture_status(void) |
| 957 |
{ |
| 958 |
return mng_status; |
| 959 |
} |
| 960 |
|
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