1/* 2%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 3% % 4% % 5% % 6% TTTTT GGGG AAA % 7% T G A A % 8% T G GG AAAAA % 9% T G G A A % 10% T GGG A A % 11% % 12% % 13% Read/Write Truevision Targa Image Format % 14% % 15% Software Design % 16% Cristy % 17% July 1992 % 18% % 19% % 20% Copyright 1999-2016 ImageMagick Studio LLC, a non-profit organization % 21% dedicated to making software imaging solutions freely available. % 22% % 23% You may not use this file except in compliance with the License. You may % 24% obtain a copy of the License at % 25% % 26% http://www.imagemagick.org/script/license.php % 27% % 28% Unless required by applicable law or agreed to in writing, software % 29% distributed under the License is distributed on an "AS IS" BASIS, % 30% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. % 31% See the License for the specific language governing permissions and % 32% limitations under the License. % 33% % 34%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 35% 36% 37*/ 38 39/* 40 Include declarations. 41*/ 42#include "MagickCore/studio.h" 43#include "MagickCore/artifact.h" 44#include "MagickCore/attribute.h" 45#include "MagickCore/blob.h" 46#include "MagickCore/blob-private.h" 47#include "MagickCore/cache.h" 48#include "MagickCore/color-private.h" 49#include "MagickCore/colormap.h" 50#include "MagickCore/colormap-private.h" 51#include "MagickCore/colorspace.h" 52#include "MagickCore/colorspace-private.h" 53#include "MagickCore/exception.h" 54#include "MagickCore/exception-private.h" 55#include "MagickCore/image.h" 56#include "MagickCore/image-private.h" 57#include "MagickCore/list.h" 58#include "MagickCore/magick.h" 59#include "MagickCore/memory_.h" 60#include "MagickCore/monitor.h" 61#include "MagickCore/monitor-private.h" 62#include "MagickCore/option.h" 63#include "MagickCore/pixel-accessor.h" 64#include "MagickCore/property.h" 65#include "MagickCore/quantum-private.h" 66#include "MagickCore/static.h" 67#include "MagickCore/string_.h" 68#include "MagickCore/module.h" 69 70/* 71 Enumerated declaractions. 72*/ 73typedef enum 74{ 75 TGAColormap = 1, 76 TGARGB = 2, 77 TGAMonochrome = 3, 78 TGARLEColormap = 9, 79 TGARLERGB = 10, 80 TGARLEMonochrome = 11 81} TGAImageType; 82 83/* 84 Typedef declaractions. 85*/ 86typedef struct _TGAInfo 87{ 88 TGAImageType 89 image_type; 90 91 unsigned char 92 id_length, 93 colormap_type; 94 95 unsigned short 96 colormap_index, 97 colormap_length; 98 99 unsigned char 100 colormap_size; 101 102 unsigned short 103 x_origin, 104 y_origin, 105 width, 106 height; 107 108 unsigned char 109 bits_per_pixel, 110 attributes; 111} TGAInfo; 112 113/* 114 Forward declarations. 115*/ 116static MagickBooleanType 117 WriteTGAImage(const ImageInfo *,Image *,ExceptionInfo *); 118 119/* 120%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 121% % 122% % 123% % 124% R e a d T G A I m a g e % 125% % 126% % 127% % 128%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 129% 130% ReadTGAImage() reads a Truevision TGA image file and returns it. 131% It allocates the memory necessary for the new Image structure and returns 132% a pointer to the new image. 133% 134% The format of the ReadTGAImage method is: 135% 136% Image *ReadTGAImage(const ImageInfo *image_info,ExceptionInfo *exception) 137% 138% A description of each parameter follows: 139% 140% o image_info: the image info. 141% 142% o exception: return any errors or warnings in this structure. 143% 144*/ 145static Image *ReadTGAImage(const ImageInfo *image_info, 146 ExceptionInfo *exception) 147{ 148 Image 149 *image; 150 151 MagickBooleanType 152 status; 153 154 PixelInfo 155 pixel; 156 157 Quantum 158 index; 159 160 register Quantum 161 *q; 162 163 register ssize_t 164 i, 165 x; 166 167 size_t 168 base, 169 flag, 170 offset, 171 real, 172 skip; 173 174 ssize_t 175 count, 176 y; 177 178 TGAInfo 179 tga_info; 180 181 unsigned char 182 j, 183 k, 184 pixels[4], 185 runlength; 186 187 unsigned int 188 alpha_bits; 189 190 /* 191 Open image file. 192 */ 193 assert(image_info != (const ImageInfo *) NULL); 194 assert(image_info->signature == MagickCoreSignature); 195 if (image_info->debug != MagickFalse) 196 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s", 197 image_info->filename); 198 assert(exception != (ExceptionInfo *) NULL); 199 assert(exception->signature == MagickCoreSignature); 200 image=AcquireImage(image_info,exception); 201 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); 202 if (status == MagickFalse) 203 { 204 image=DestroyImageList(image); 205 return((Image *) NULL); 206 } 207 /* 208 Read TGA header information. 209 */ 210 count=ReadBlob(image,1,&tga_info.id_length); 211 tga_info.colormap_type=(unsigned char) ReadBlobByte(image); 212 tga_info.image_type=(TGAImageType) ReadBlobByte(image); 213 if ((count != 1) || 214 ((tga_info.image_type != TGAColormap) && 215 (tga_info.image_type != TGARGB) && 216 (tga_info.image_type != TGAMonochrome) && 217 (tga_info.image_type != TGARLEColormap) && 218 (tga_info.image_type != TGARLERGB) && 219 (tga_info.image_type != TGARLEMonochrome)) || 220 (((tga_info.image_type == TGAColormap) || 221 (tga_info.image_type == TGARLEColormap)) && 222 (tga_info.colormap_type == 0))) 223 ThrowReaderException(CorruptImageError,"ImproperImageHeader"); 224 tga_info.colormap_index=ReadBlobLSBShort(image); 225 tga_info.colormap_length=ReadBlobLSBShort(image); 226 tga_info.colormap_size=(unsigned char) ReadBlobByte(image); 227 tga_info.x_origin=ReadBlobLSBShort(image); 228 tga_info.y_origin=ReadBlobLSBShort(image); 229 tga_info.width=(unsigned short) ReadBlobLSBShort(image); 230 tga_info.height=(unsigned short) ReadBlobLSBShort(image); 231 tga_info.bits_per_pixel=(unsigned char) ReadBlobByte(image); 232 tga_info.attributes=(unsigned char) ReadBlobByte(image); 233 if (EOFBlob(image) != MagickFalse) 234 ThrowReaderException(CorruptImageError,"UnableToReadImageData"); 235 if ((((tga_info.bits_per_pixel <= 1) || (tga_info.bits_per_pixel >= 17)) && 236 (tga_info.bits_per_pixel != 24) && (tga_info.bits_per_pixel != 32))) 237 ThrowReaderException(CorruptImageError,"ImproperImageHeader"); 238 /* 239 Initialize image structure. 240 */ 241 image->columns=tga_info.width; 242 image->rows=tga_info.height; 243 alpha_bits=(tga_info.attributes & 0x0FU); 244 image->alpha_trait=(alpha_bits > 0) || (tga_info.bits_per_pixel == 32) || 245 (tga_info.colormap_size == 32) ? BlendPixelTrait : UndefinedPixelTrait; 246 if ((tga_info.image_type != TGAColormap) && 247 (tga_info.image_type != TGARLEColormap)) 248 image->depth=(size_t) ((tga_info.bits_per_pixel <= 8) ? 8 : 249 (tga_info.bits_per_pixel <= 16) ? 5 : 250 (tga_info.bits_per_pixel == 24) ? 8 : 251 (tga_info.bits_per_pixel == 32) ? 8 : 8); 252 else 253 image->depth=(size_t) ((tga_info.colormap_size <= 8) ? 8 : 254 (tga_info.colormap_size <= 16) ? 5 : 255 (tga_info.colormap_size == 24) ? 8 : 256 (tga_info.colormap_size == 32) ? 8 : 8); 257 if ((tga_info.image_type == TGAColormap) || 258 (tga_info.image_type == TGAMonochrome) || 259 (tga_info.image_type == TGARLEColormap) || 260 (tga_info.image_type == TGARLEMonochrome)) 261 image->storage_class=PseudoClass; 262 image->compression=NoCompression; 263 if ((tga_info.image_type == TGARLEColormap) || 264 (tga_info.image_type == TGARLEMonochrome) || 265 (tga_info.image_type == TGARLERGB)) 266 image->compression=RLECompression; 267 if (image->storage_class == PseudoClass) 268 { 269 if (tga_info.colormap_type != 0) 270 image->colors=tga_info.colormap_index+tga_info.colormap_length; 271 else 272 { 273 size_t 274 one; 275 276 one=1; 277 image->colors=one << tga_info.bits_per_pixel; 278 if (AcquireImageColormap(image,image->colors,exception) == MagickFalse) 279 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); 280 } 281 } 282 if (tga_info.id_length != 0) 283 { 284 char 285 *comment; 286 287 size_t 288 length; 289 290 /* 291 TGA image comment. 292 */ 293 length=(size_t) tga_info.id_length; 294 comment=(char *) NULL; 295 if (~length >= (MagickPathExtent-1)) 296 comment=(char *) AcquireQuantumMemory(length+MagickPathExtent, 297 sizeof(*comment)); 298 if (comment == (char *) NULL) 299 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); 300 count=ReadBlob(image,tga_info.id_length,(unsigned char *) comment); 301 comment[tga_info.id_length]='\0'; 302 (void) SetImageProperty(image,"comment",comment,exception); 303 comment=DestroyString(comment); 304 } 305 if (tga_info.attributes & (1UL << 4)) 306 { 307 if (tga_info.attributes & (1UL << 5)) 308 SetImageArtifact(image,"tga:image-origin","TopRight"); 309 else 310 SetImageArtifact(image,"tga:image-origin","BottomRight"); 311 } 312 else 313 { 314 if (tga_info.attributes & (1UL << 5)) 315 SetImageArtifact(image,"tga:image-origin","TopLeft"); 316 else 317 SetImageArtifact(image,"tga:image-origin","BottomLeft"); 318 } 319 if (image_info->ping != MagickFalse) 320 { 321 (void) CloseBlob(image); 322 return(image); 323 } 324 status=SetImageExtent(image,image->columns,image->rows,exception); 325 if (status == MagickFalse) 326 return(DestroyImageList(image)); 327 (void) ResetMagickMemory(&pixel,0,sizeof(pixel)); 328 pixel.alpha=(MagickRealType) OpaqueAlpha; 329 if (tga_info.colormap_type != 0) 330 { 331 /* 332 Read TGA raster colormap. 333 */ 334 if (image->colors < tga_info.colormap_index) 335 image->colors=tga_info.colormap_index; 336 if (AcquireImageColormap(image,image->colors,exception) == MagickFalse) 337 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); 338 for (i=0; i < (ssize_t) tga_info.colormap_index; i++) 339 image->colormap[i]=pixel; 340 for ( ; i < (ssize_t) image->colors; i++) 341 { 342 switch (tga_info.colormap_size) 343 { 344 case 8: 345 default: 346 { 347 /* 348 Gray scale. 349 */ 350 pixel.red=(MagickRealType) ScaleCharToQuantum((unsigned char) 351 ReadBlobByte(image)); 352 pixel.green=pixel.red; 353 pixel.blue=pixel.red; 354 break; 355 } 356 case 15: 357 case 16: 358 { 359 QuantumAny 360 range; 361 362 /* 363 5 bits each of red green and blue. 364 */ 365 j=(unsigned char) ReadBlobByte(image); 366 k=(unsigned char) ReadBlobByte(image); 367 range=GetQuantumRange(5UL); 368 pixel.red=(MagickRealType) ScaleAnyToQuantum(1UL*(k & 0x7c) >> 2, 369 range); 370 pixel.green=(MagickRealType) ScaleAnyToQuantum((1UL*(k & 0x03) 371 << 3)+(1UL*(j & 0xe0) >> 5),range); 372 pixel.blue=(MagickRealType) ScaleAnyToQuantum(1UL*(j & 0x1f),range); 373 break; 374 } 375 case 24: 376 { 377 /* 378 8 bits each of blue, green and red. 379 */ 380 pixel.blue=(MagickRealType) ScaleCharToQuantum((unsigned char) 381 ReadBlobByte(image)); 382 pixel.green=(MagickRealType) ScaleCharToQuantum((unsigned char) 383 ReadBlobByte(image)); 384 pixel.red=(MagickRealType) ScaleCharToQuantum((unsigned char) 385 ReadBlobByte(image)); 386 break; 387 } 388 case 32: 389 { 390 /* 391 8 bits each of blue, green, red, and alpha. 392 */ 393 pixel.blue=(MagickRealType) ScaleCharToQuantum((unsigned char) 394 ReadBlobByte(image)); 395 pixel.green=(MagickRealType) ScaleCharToQuantum((unsigned char) 396 ReadBlobByte(image)); 397 pixel.red=(MagickRealType) ScaleCharToQuantum((unsigned char) 398 ReadBlobByte(image)); 399 pixel.alpha=(MagickRealType) ScaleCharToQuantum((unsigned char) 400 ReadBlobByte(image)); 401 break; 402 } 403 } 404 image->colormap[i]=pixel; 405 } 406 } 407 /* 408 Convert TGA pixels to pixel packets. 409 */ 410 base=0; 411 flag=0; 412 skip=MagickFalse; 413 real=0; 414 index=0; 415 runlength=0; 416 offset=0; 417 for (y=0; y < (ssize_t) image->rows; y++) 418 { 419 real=offset; 420 if (((unsigned char) (tga_info.attributes & 0x20) >> 5) == 0) 421 real=image->rows-real-1; 422 q=QueueAuthenticPixels(image,0,(ssize_t) real,image->columns,1,exception); 423 if (q == (Quantum *) NULL) 424 break; 425 for (x=0; x < (ssize_t) image->columns; x++) 426 { 427 if ((tga_info.image_type == TGARLEColormap) || 428 (tga_info.image_type == TGARLERGB) || 429 (tga_info.image_type == TGARLEMonochrome)) 430 { 431 if (runlength != 0) 432 { 433 runlength--; 434 skip=flag != 0; 435 } 436 else 437 { 438 count=ReadBlob(image,1,&runlength); 439 if (count != 1) 440 ThrowReaderException(CorruptImageError,"UnableToReadImageData"); 441 flag=runlength & 0x80; 442 if (flag != 0) 443 runlength-=128; 444 skip=MagickFalse; 445 } 446 } 447 if (skip == MagickFalse) 448 switch (tga_info.bits_per_pixel) 449 { 450 case 8: 451 default: 452 { 453 /* 454 Gray scale. 455 */ 456 index=(Quantum) ReadBlobByte(image); 457 if (tga_info.colormap_type != 0) 458 pixel=image->colormap[(ssize_t) ConstrainColormapIndex(image, 459 (ssize_t) index,exception)]; 460 else 461 { 462 pixel.red=(MagickRealType) ScaleCharToQuantum((unsigned char) 463 index); 464 pixel.green=(MagickRealType) ScaleCharToQuantum((unsigned char) 465 index); 466 pixel.blue=(MagickRealType) ScaleCharToQuantum((unsigned char) 467 index); 468 } 469 break; 470 } 471 case 15: 472 case 16: 473 { 474 QuantumAny 475 range; 476 477 /* 478 5 bits each of RGB. 479 */ 480 if (ReadBlob(image,2,pixels) != 2) 481 ThrowReaderException(CorruptImageError,"UnableToReadImageData"); 482 j=pixels[0]; 483 k=pixels[1]; 484 range=GetQuantumRange(5UL); 485 pixel.red=(MagickRealType) ScaleAnyToQuantum(1UL*(k & 0x7c) >> 2, 486 range); 487 pixel.green=(MagickRealType) ScaleAnyToQuantum((1UL* 488 (k & 0x03) << 3)+(1UL*(j & 0xe0) >> 5),range); 489 pixel.blue=(MagickRealType) ScaleAnyToQuantum(1UL*(j & 0x1f),range); 490 if (image->alpha_trait != UndefinedPixelTrait) 491 pixel.alpha=(MagickRealType) ((k & 0x80) == 0 ? (Quantum) 492 TransparentAlpha : (Quantum) OpaqueAlpha); 493 if (image->storage_class == PseudoClass) 494 index=(Quantum) ConstrainColormapIndex(image,((ssize_t) (k << 8))+ 495 j,exception); 496 break; 497 } 498 case 24: 499 { 500 /* 501 BGR pixels. 502 */ 503 if (ReadBlob(image,3,pixels) != 3) 504 ThrowReaderException(CorruptImageError,"UnableToReadImageData"); 505 pixel.blue=(MagickRealType) ScaleCharToQuantum(pixels[0]); 506 pixel.green=(MagickRealType) ScaleCharToQuantum(pixels[1]); 507 pixel.red=(MagickRealType) ScaleCharToQuantum(pixels[2]); 508 break; 509 } 510 case 32: 511 { 512 /* 513 BGRA pixels. 514 */ 515 if (ReadBlob(image,4,pixels) != 4) 516 ThrowReaderException(CorruptImageError,"UnableToReadImageData"); 517 pixel.blue=(MagickRealType) ScaleCharToQuantum(pixels[0]); 518 pixel.green=(MagickRealType) ScaleCharToQuantum(pixels[1]); 519 pixel.red=(MagickRealType) ScaleCharToQuantum(pixels[2]); 520 pixel.alpha=(MagickRealType) ScaleCharToQuantum(pixels[3]); 521 break; 522 } 523 } 524 if (status == MagickFalse) 525 ThrowReaderException(CorruptImageError,"UnableToReadImageData"); 526 if (image->storage_class == PseudoClass) 527 SetPixelIndex(image,index,q); 528 SetPixelRed(image,ClampToQuantum(pixel.red),q); 529 SetPixelGreen(image,ClampToQuantum(pixel.green),q); 530 SetPixelBlue(image,ClampToQuantum(pixel.blue),q); 531 if (image->alpha_trait != UndefinedPixelTrait) 532 SetPixelAlpha(image,ClampToQuantum(pixel.alpha),q); 533 q+=GetPixelChannels(image); 534 } 535 /* 536 if (((unsigned char) (tga_info.attributes & 0xc0) >> 6) == 4) 537 offset+=4; 538 else 539 */ 540 if (((unsigned char) (tga_info.attributes & 0xc0) >> 6) == 2) 541 offset+=2; 542 else 543 offset++; 544 if (offset >= image->rows) 545 { 546 base++; 547 offset=base; 548 } 549 if (SyncAuthenticPixels(image,exception) == MagickFalse) 550 break; 551 if (image->previous == (Image *) NULL) 552 { 553 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y, 554 image->rows); 555 if (status == MagickFalse) 556 break; 557 } 558 } 559 if (EOFBlob(image) != MagickFalse) 560 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", 561 image->filename); 562 (void) CloseBlob(image); 563 return(GetFirstImageInList(image)); 564} 565 566/* 567%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 568% % 569% % 570% % 571% R e g i s t e r T G A I m a g e % 572% % 573% % 574% % 575%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 576% 577% RegisterTGAImage() adds properties for the TGA image format to 578% the list of supported formats. The properties include the image format 579% tag, a method to read and/or write the format, whether the format 580% supports the saving of more than one frame to the same file or blob, 581% whether the format supports native in-memory I/O, and a brief 582% description of the format. 583% 584% The format of the RegisterTGAImage method is: 585% 586% size_t RegisterTGAImage(void) 587% 588*/ 589ModuleExport size_t RegisterTGAImage(void) 590{ 591 MagickInfo 592 *entry; 593 594 entry=AcquireMagickInfo("TGA","ICB","Truevision Targa image"); 595 entry->decoder=(DecodeImageHandler *) ReadTGAImage; 596 entry->encoder=(EncodeImageHandler *) WriteTGAImage; 597 entry->flags^=CoderAdjoinFlag; 598 (void) RegisterMagickInfo(entry); 599 entry=AcquireMagickInfo("TGA","TGA","Truevision Targa image"); 600 entry->decoder=(DecodeImageHandler *) ReadTGAImage; 601 entry->encoder=(EncodeImageHandler *) WriteTGAImage; 602 entry->flags^=CoderAdjoinFlag; 603 (void) RegisterMagickInfo(entry); 604 entry=AcquireMagickInfo("TGA","VDA","Truevision Targa image"); 605 entry->decoder=(DecodeImageHandler *) ReadTGAImage; 606 entry->encoder=(EncodeImageHandler *) WriteTGAImage; 607 entry->flags^=CoderAdjoinFlag; 608 (void) RegisterMagickInfo(entry); 609 entry=AcquireMagickInfo("TGA","VST","Truevision Targa image"); 610 entry->decoder=(DecodeImageHandler *) ReadTGAImage; 611 entry->encoder=(EncodeImageHandler *) WriteTGAImage; 612 entry->flags^=CoderAdjoinFlag; 613 (void) RegisterMagickInfo(entry); 614 return(MagickImageCoderSignature); 615} 616 617/* 618%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 619% % 620% % 621% % 622% U n r e g i s t e r T G A I m a g e % 623% % 624% % 625% % 626%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 627% 628% UnregisterTGAImage() removes format registrations made by the 629% TGA module from the list of supported formats. 630% 631% The format of the UnregisterTGAImage method is: 632% 633% UnregisterTGAImage(void) 634% 635*/ 636ModuleExport void UnregisterTGAImage(void) 637{ 638 (void) UnregisterMagickInfo("ICB"); 639 (void) UnregisterMagickInfo("TGA"); 640 (void) UnregisterMagickInfo("VDA"); 641 (void) UnregisterMagickInfo("VST"); 642} 643 644/* 645%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 646% % 647% % 648% % 649% W r i t e T G A I m a g e % 650% % 651% % 652% % 653%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 654% 655% WriteTGAImage() writes a image in the Truevision Targa rasterfile 656% format. 657% 658% The format of the WriteTGAImage method is: 659% 660% MagickBooleanType WriteTGAImage(const ImageInfo *image_info, 661% Image *image,ExceptionInfo *exception) 662% 663% A description of each parameter follows. 664% 665% o image_info: the image info. 666% 667% o image: The image. 668% 669*/ 670static inline void WriteTGAPixel(Image *image,TGAImageType image_type, 671 const Quantum *p,const QuantumAny range,const double midpoint) 672{ 673 if (image_type == TGAColormap || image_type == TGARLEColormap) 674 (void) WriteBlobByte(image,(unsigned char) GetPixelIndex(image,p)); 675 else 676 { 677 if (image_type == TGAMonochrome || image_type == TGARLEMonochrome) 678 (void) WriteBlobByte(image,ScaleQuantumToChar(ClampToQuantum( 679 GetPixelLuma(image,p)))); 680 else 681 if (image->depth == 5) 682 { 683 unsigned char 684 green, 685 value; 686 687 green=(unsigned char) ScaleQuantumToAny(GetPixelGreen(image,p), 688 range); 689 value=((unsigned char) ScaleQuantumToAny(GetPixelBlue(image,p), 690 range)) | ((green & 0x07) << 5); 691 (void) WriteBlobByte(image,value); 692 value=(((image->alpha_trait != UndefinedPixelTrait) && 693 ((double) GetPixelAlpha(image,p) > midpoint)) ? 0x80 : 0) | 694 ((unsigned char) ScaleQuantumToAny(GetPixelRed(image,p),range) << 695 2) | ((green & 0x18) >> 3); 696 (void) WriteBlobByte(image,value); 697 } 698 else 699 { 700 (void) WriteBlobByte(image,ScaleQuantumToChar( 701 GetPixelBlue(image,p))); 702 (void) WriteBlobByte(image,ScaleQuantumToChar( 703 GetPixelGreen(image,p))); 704 (void) WriteBlobByte(image,ScaleQuantumToChar( 705 GetPixelRed(image,p))); 706 if (image->alpha_trait != UndefinedPixelTrait) 707 (void) WriteBlobByte(image,ScaleQuantumToChar( 708 GetPixelAlpha(image,p))); 709 } 710 } 711} 712 713static MagickBooleanType WriteTGAImage(const ImageInfo *image_info,Image *image, 714 ExceptionInfo *exception) 715{ 716 CompressionType 717 compression; 718 719 const char 720 *value; 721 722 const double 723 midpoint = QuantumRange/2.0; 724 725 MagickBooleanType 726 status; 727 728 QuantumAny 729 range; 730 731 register const Quantum 732 *p; 733 734 register ssize_t 735 x; 736 737 register ssize_t 738 i; 739 740 register unsigned char 741 *q; 742 743 size_t 744 channels; 745 746 ssize_t 747 count, 748 y; 749 750 TGAInfo 751 tga_info; 752 753 /* 754 Open output image file. 755 */ 756 assert(image_info != (const ImageInfo *) NULL); 757 assert(image_info->signature == MagickCoreSignature); 758 assert(image != (Image *) NULL); 759 assert(image->signature == MagickCoreSignature); 760 if (image->debug != MagickFalse) 761 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); 762 assert(exception != (ExceptionInfo *) NULL); 763 assert(exception->signature == MagickCoreSignature); 764 status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception); 765 if (status == MagickFalse) 766 return(status); 767 /* 768 Initialize TGA raster file header. 769 */ 770 if ((image->columns > 65535L) || (image->rows > 65535L)) 771 ThrowWriterException(ImageError,"WidthOrHeightExceedsLimit"); 772 (void) TransformImageColorspace(image,sRGBColorspace,exception); 773 compression=image->compression; 774 if (image_info->compression != UndefinedCompression) 775 compression=image_info->compression; 776 range=GetQuantumRange(5UL); 777 tga_info.id_length=0; 778 value=GetImageProperty(image,"comment",exception); 779 if (value != (const char *) NULL) 780 tga_info.id_length=(unsigned char) MagickMin(strlen(value),255); 781 tga_info.colormap_type=0; 782 tga_info.colormap_index=0; 783 tga_info.colormap_length=0; 784 tga_info.colormap_size=0; 785 tga_info.x_origin=0; 786 tga_info.y_origin=0; 787 tga_info.width=(unsigned short) image->columns; 788 tga_info.height=(unsigned short) image->rows; 789 tga_info.bits_per_pixel=8; 790 tga_info.attributes=0; 791 if ((image_info->type != TrueColorType) && 792 (image_info->type != TrueColorAlphaType) && 793 (image_info->type != PaletteType) && 794 (image->alpha_trait == UndefinedPixelTrait) && 795 (SetImageGray(image,exception) != MagickFalse)) 796 tga_info.image_type=compression == RLECompression ? TGARLEMonochrome : 797 TGAMonochrome; 798 else 799 if ((image->storage_class == DirectClass) || (image->colors > 256)) 800 { 801 /* 802 Full color TGA raster. 803 */ 804 tga_info.image_type=compression == RLECompression ? TGARLERGB : TGARGB; 805 if (image_info->depth == 5) 806 { 807 tga_info.bits_per_pixel=16; 808 if (image->alpha_trait != UndefinedPixelTrait) 809 tga_info.attributes=1; /* # of alpha bits */ 810 } 811 else 812 { 813 tga_info.bits_per_pixel=24; 814 if (image->alpha_trait != UndefinedPixelTrait) 815 { 816 tga_info.bits_per_pixel=32; 817 tga_info.attributes=8; /* # of alpha bits */ 818 } 819 } 820 } 821 else 822 { 823 /* 824 Colormapped TGA raster. 825 */ 826 tga_info.image_type=compression == RLECompression ? TGARLEColormap : 827 TGAColormap; 828 tga_info.colormap_type=1; 829 tga_info.colormap_length=(unsigned short) image->colors; 830 if (image_info->depth == 5) 831 tga_info.colormap_size=16; 832 else 833 tga_info.colormap_size=24; 834 } 835 value=GetImageArtifact(image,"tga:image-origin"); 836 if (value != (const char *) NULL) 837 { 838 OrientationType 839 origin; 840 841 origin=(OrientationType) ParseCommandOption(MagickOrientationOptions, 842 MagickFalse,value); 843 if (origin == BottomRightOrientation || origin == TopRightOrientation) 844 tga_info.attributes|=(1UL << 4); 845 if (origin == TopLeftOrientation || origin == TopRightOrientation) 846 tga_info.attributes|=(1UL << 5); 847 } 848 /* 849 Write TGA header. 850 */ 851 (void) WriteBlobByte(image,tga_info.id_length); 852 (void) WriteBlobByte(image,tga_info.colormap_type); 853 (void) WriteBlobByte(image,(unsigned char) tga_info.image_type); 854 (void) WriteBlobLSBShort(image,tga_info.colormap_index); 855 (void) WriteBlobLSBShort(image,tga_info.colormap_length); 856 (void) WriteBlobByte(image,tga_info.colormap_size); 857 (void) WriteBlobLSBShort(image,tga_info.x_origin); 858 (void) WriteBlobLSBShort(image,tga_info.y_origin); 859 (void) WriteBlobLSBShort(image,tga_info.width); 860 (void) WriteBlobLSBShort(image,tga_info.height); 861 (void) WriteBlobByte(image,tga_info.bits_per_pixel); 862 (void) WriteBlobByte(image,tga_info.attributes); 863 if (tga_info.id_length != 0) 864 (void) WriteBlob(image,tga_info.id_length,(unsigned char *) value); 865 if (tga_info.colormap_type != 0) 866 { 867 unsigned char 868 green, 869 *targa_colormap; 870 871 /* 872 Dump colormap to file (blue, green, red byte order). 873 */ 874 targa_colormap=(unsigned char *) AcquireQuantumMemory((size_t) 875 tga_info.colormap_length,(tga_info.colormap_size/8)* 876 sizeof(*targa_colormap)); 877 if (targa_colormap == (unsigned char *) NULL) 878 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed"); 879 q=targa_colormap; 880 for (i=0; i < (ssize_t) image->colors; i++) 881 { 882 if (image_info->depth == 5) 883 { 884 green=(unsigned char) ScaleQuantumToAny(ClampToQuantum( 885 image->colormap[i].green),range); 886 *q++=((unsigned char) ScaleQuantumToAny(ClampToQuantum( 887 image->colormap[i].blue),range)) | ((green & 0x07) << 5); 888 *q++=(((image->alpha_trait != UndefinedPixelTrait) && ((double) 889 ClampToQuantum(image->colormap[i].alpha) > midpoint)) ? 0x80 : 0) | 890 ((unsigned char) ScaleQuantumToAny(ClampToQuantum( 891 image->colormap[i].red),range) << 2) | ((green & 0x18) >> 3); 892 } 893 else 894 { 895 *q++=ScaleQuantumToChar(ClampToQuantum(image->colormap[i].blue)); 896 *q++=ScaleQuantumToChar(ClampToQuantum(image->colormap[i].green)); 897 *q++=ScaleQuantumToChar(ClampToQuantum(image->colormap[i].red)); 898 } 899 } 900 (void) WriteBlob(image,(size_t) ((tga_info.colormap_size/8)* 901 tga_info.colormap_length),targa_colormap); 902 targa_colormap=(unsigned char *) RelinquishMagickMemory(targa_colormap); 903 } 904 /* 905 Convert MIFF to TGA raster pixels. 906 */ 907 channels=GetPixelChannels(image); 908 for (y=(ssize_t) (image->rows-1); y >= 0; y--) 909 { 910 p=GetVirtualPixels(image,0,y,image->columns,1,exception); 911 if (p == (const Quantum *) NULL) 912 break; 913 if (compression == RLECompression) 914 { 915 x=0; 916 count=0; 917 while (x < (ssize_t) image->columns) 918 { 919 i=1; 920 while ((i < 128) && (count + i < 128) && 921 ((x + i) < (ssize_t) image->columns)) 922 { 923 if (tga_info.image_type == TGARLEColormap) 924 { 925 if (GetPixelIndex(image,p+(i*channels)) != 926 GetPixelIndex(image,p+((i-1)*channels))) 927 break; 928 } 929 else if (tga_info.image_type == TGARLEMonochrome) 930 { 931 if (GetPixelLuma(image,p+(i*channels)) != 932 GetPixelLuma(image,p+((i-1)*channels))) 933 break; 934 } 935 else 936 { 937 if ((GetPixelBlue(image,p+(i*channels)) != 938 GetPixelBlue(image,p+((i-1)*channels))) || 939 (GetPixelGreen(image,p+(i*channels)) != 940 GetPixelGreen(image,p+((i-1)*channels))) || 941 (GetPixelRed(image,p+(i*channels)) != 942 GetPixelRed(image,p+((i-1)*channels)))) 943 break; 944 if ((image->alpha_trait != UndefinedPixelTrait) && 945 (GetPixelAlpha(image,p+(i*channels)) != 946 GetPixelAlpha(image,p+(i-1)*channels))) 947 break; 948 } 949 i++; 950 } 951 if (i < 3) 952 { 953 count+=i; 954 p+=(i*channels); 955 } 956 if ((i >= 3) || (count == 128) || 957 ((x + i) == (ssize_t) image->columns)) 958 { 959 if (count > 0) 960 { 961 (void) WriteBlobByte(image,(unsigned char) (--count)); 962 while (count >= 0) 963 { 964 WriteTGAPixel(image,tga_info.image_type,p-((count+1)* 965 channels),range,midpoint); 966 count--; 967 } 968 count=0; 969 } 970 } 971 if (i >= 3) 972 { 973 (void) WriteBlobByte(image,(unsigned char) ((i-1) | 0x80)); 974 WriteTGAPixel(image,tga_info.image_type,p,range,midpoint); 975 p+=(i*channels); 976 } 977 x+=i; 978 } 979 } 980 else 981 { 982 for (x=0; x < (ssize_t) image->columns; x++) 983 { 984 WriteTGAPixel(image,tga_info.image_type,p,range,midpoint); 985 p+=channels; 986 } 987 } 988 if (image->previous == (Image *) NULL) 989 { 990 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y, 991 image->rows); 992 if (status == MagickFalse) 993 break; 994 } 995 } 996 (void) CloseBlob(image); 997 return(MagickTrue); 998} 999