/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % TTTTT GGGG AAA % % T G A A % % T G GG AAAAA % % T G G A A % % T GGG A A % % % % % % Read/Write Truevision Targa Image Format % % % % Software Design % % Cristy % % July 1992 % % % % % % Copyright 1999-2021 ImageMagick Studio LLC, a non-profit organization % % dedicated to making software imaging solutions freely available. % % % % You may not use this file except in compliance with the License. You may % % obtain a copy of the License at % % % % https://imagemagick.org/script/license.php % % % % Unless required by applicable law or agreed to in writing, software % % distributed under the License is distributed on an "AS IS" BASIS, % % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. % % See the License for the specific language governing permissions and % % limitations under the License. % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % */ /* Include declarations. */ #include "MagickCore/studio.h" #include "MagickCore/artifact.h" #include "MagickCore/attribute.h" #include "MagickCore/blob.h" #include "MagickCore/blob-private.h" #include "MagickCore/cache.h" #include "MagickCore/color-private.h" #include "MagickCore/colormap.h" #include "MagickCore/colormap-private.h" #include "MagickCore/colorspace.h" #include "MagickCore/colorspace-private.h" #include "MagickCore/exception.h" #include "MagickCore/exception-private.h" #include "MagickCore/image.h" #include "MagickCore/image-private.h" #include "MagickCore/list.h" #include "MagickCore/magick.h" #include "MagickCore/memory_.h" #include "MagickCore/monitor.h" #include "MagickCore/monitor-private.h" #include "MagickCore/option.h" #include "MagickCore/pixel-accessor.h" #include "MagickCore/property.h" #include "MagickCore/quantum-private.h" #include "MagickCore/static.h" #include "MagickCore/string_.h" #include "MagickCore/module.h" /* Enumerated declaractions. */ typedef enum { TGAColormap = 1, TGARGB = 2, TGAMonochrome = 3, TGARLEColormap = 9, TGARLERGB = 10, TGARLEMonochrome = 11 } TGAImageType; /* Typedef declaractions. */ typedef struct _TGAInfo { TGAImageType image_type; unsigned char id_length, colormap_type; unsigned short colormap_index, colormap_length; unsigned char colormap_size; unsigned short x_origin, y_origin, width, height; unsigned char bits_per_pixel, attributes; } TGAInfo; /* Forward declarations. */ static MagickBooleanType WriteTGAImage(const ImageInfo *,Image *,ExceptionInfo *); /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e a d T G A I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % ReadTGAImage() reads a Truevision TGA image file and returns it. % It allocates the memory necessary for the new Image structure and returns % a pointer to the new image. % % The format of the ReadTGAImage method is: % % Image *ReadTGAImage(const ImageInfo *image_info,ExceptionInfo *exception) % % A description of each parameter follows: % % o image_info: the image info. % % o exception: return any errors or warnings in this structure. % */ static Image *ReadTGAImage(const ImageInfo *image_info,ExceptionInfo *exception) { Image *image; MagickBooleanType status; PixelInfo pixel; Quantum index; Quantum *q; ssize_t i, x; size_t base, flag, skip; ssize_t count, offset, y; TGAInfo tga_info; unsigned char j, k, pixels[4], runlength; unsigned int alpha_bits; /* Open image file. */ assert(image_info != (const ImageInfo *) NULL); assert(image_info->signature == MagickCoreSignature); if (image_info->debug != MagickFalse) (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s", image_info->filename); assert(exception != (ExceptionInfo *) NULL); assert(exception->signature == MagickCoreSignature); image=AcquireImage(image_info,exception); status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); if (status == MagickFalse) { image=DestroyImageList(image); return((Image *) NULL); } /* Read TGA header information. */ count=ReadBlob(image,1,&tga_info.id_length); tga_info.colormap_type=(unsigned char) ReadBlobByte(image); tga_info.image_type=(TGAImageType) ReadBlobByte(image); if ((count != 1) || ((tga_info.image_type != TGAColormap) && (tga_info.image_type != TGARGB) && (tga_info.image_type != TGAMonochrome) && (tga_info.image_type != TGARLEColormap) && (tga_info.image_type != TGARLERGB) && (tga_info.image_type != TGARLEMonochrome)) || (((tga_info.image_type == TGAColormap) || (tga_info.image_type == TGARLEColormap)) && (tga_info.colormap_type == 0))) ThrowReaderException(CorruptImageError,"ImproperImageHeader"); tga_info.colormap_index=ReadBlobLSBShort(image); tga_info.colormap_length=ReadBlobLSBShort(image); tga_info.colormap_size=(unsigned char) ReadBlobByte(image); tga_info.x_origin=ReadBlobLSBShort(image); tga_info.y_origin=ReadBlobLSBShort(image); tga_info.width=(unsigned short) ReadBlobLSBShort(image); tga_info.height=(unsigned short) ReadBlobLSBShort(image); tga_info.bits_per_pixel=(unsigned char) ReadBlobByte(image); tga_info.attributes=(unsigned char) ReadBlobByte(image); if (EOFBlob(image) != MagickFalse) ThrowReaderException(CorruptImageError,"UnableToReadImageData"); if ((((tga_info.bits_per_pixel <= 1) || (tga_info.bits_per_pixel >= 17)) && (tga_info.bits_per_pixel != 24) && (tga_info.bits_per_pixel != 32))) ThrowReaderException(CorruptImageError,"ImproperImageHeader"); /* Initialize image structure. */ image->columns=tga_info.width; image->rows=tga_info.height; if ((tga_info.image_type != TGAMonochrome) && (tga_info.image_type != TGARLEMonochrome)) { alpha_bits=(tga_info.attributes & 0x0FU); image->alpha_trait=(alpha_bits > 0) || (tga_info.bits_per_pixel == 32) || (tga_info.colormap_size == 32) ? BlendPixelTrait : UndefinedPixelTrait; } if ((tga_info.image_type != TGAColormap) && (tga_info.image_type != TGARLEColormap)) image->depth=(size_t) ((tga_info.bits_per_pixel <= 8) ? 8 : (tga_info.bits_per_pixel <= 16) ? 5 : 8); else image->depth=(size_t) ((tga_info.colormap_size <= 8) ? 8 : (tga_info.colormap_size <= 16) ? 5 : 8); if ((tga_info.image_type == TGAColormap) || (tga_info.image_type == TGARLEColormap)) image->storage_class=PseudoClass; if ((tga_info.image_type == TGAMonochrome) || (tga_info.image_type == TGARLEMonochrome)) { image->type=GrayscaleType; image->colorspace=GRAYColorspace; } image->compression=NoCompression; if ((tga_info.image_type == TGARLEColormap) || (tga_info.image_type == TGARLEMonochrome) || (tga_info.image_type == TGARLERGB)) image->compression=RLECompression; if (image->storage_class == PseudoClass) { if (tga_info.colormap_type != 0) image->colors=tga_info.colormap_index+tga_info.colormap_length; else { size_t one; one=1; image->colors=one << tga_info.bits_per_pixel; if ((MagickSizeType) image->colors > GetBlobSize(image)) ThrowReaderException(CorruptImageError, "InsufficientImageDataInFile"); if (AcquireImageColormap(image,image->colors,exception) == MagickFalse) ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); } } if (tga_info.id_length != 0) { char *comment; size_t length; /* TGA image comment. */ length=(size_t) tga_info.id_length; comment=(char *) NULL; if (~length >= (MagickPathExtent-1)) comment=(char *) AcquireQuantumMemory(length+MagickPathExtent, sizeof(*comment)); if (comment == (char *) NULL) ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); count=ReadBlob(image,length,(unsigned char *) comment); if (count == (ssize_t) length) { comment[length]='\0'; (void) SetImageProperty(image,"comment",comment,exception); } comment=DestroyString(comment); } image->orientation=BottomLeftOrientation; if ((tga_info.attributes & (1UL << 4)) == 0) { if ((tga_info.attributes & (1UL << 5)) == 0) image->orientation=BottomLeftOrientation; else image->orientation=TopLeftOrientation; } else { if ((tga_info.attributes & (1UL << 5)) == 0) image->orientation=BottomRightOrientation; else image->orientation=TopRightOrientation; } if (image_info->ping != MagickFalse) { (void) CloseBlob(image); return(image); } status=SetImageExtent(image,image->columns,image->rows,exception); if (status == MagickFalse) return(DestroyImageList(image)); (void) memset(&pixel,0,sizeof(pixel)); pixel.alpha=(MagickRealType) OpaqueAlpha; if (tga_info.colormap_type != 0) { /* Read TGA raster colormap. */ if (image->colors < tga_info.colormap_index) image->colors=tga_info.colormap_index; if (AcquireImageColormap(image,image->colors,exception) == MagickFalse) ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); for (i=0; i < (ssize_t) tga_info.colormap_index; i++) image->colormap[i]=pixel; for ( ; i < (ssize_t) image->colors; i++) { switch (tga_info.colormap_size) { case 8: default: { /* Gray scale. */ pixel.red=(MagickRealType) ScaleCharToQuantum((unsigned char) ReadBlobByte(image)); pixel.green=pixel.red; pixel.blue=pixel.red; break; } case 15: case 16: { QuantumAny range; /* 5 bits each of red green and blue. */ j=(unsigned char) ReadBlobByte(image); k=(unsigned char) ReadBlobByte(image); range=GetQuantumRange(5UL); pixel.red=(MagickRealType) ScaleAnyToQuantum(1UL*(k & 0x7c) >> 2, range); pixel.green=(MagickRealType) ScaleAnyToQuantum((1UL*(k & 0x03) << 3)+(1UL*(j & 0xe0) >> 5),range); pixel.blue=(MagickRealType) ScaleAnyToQuantum(1UL*(j & 0x1f),range); break; } case 24: { /* 8 bits each of blue, green and red. */ pixel.blue=(MagickRealType) ScaleCharToQuantum((unsigned char) ReadBlobByte(image)); pixel.green=(MagickRealType) ScaleCharToQuantum((unsigned char) ReadBlobByte(image)); pixel.red=(MagickRealType) ScaleCharToQuantum((unsigned char) ReadBlobByte(image)); break; } case 32: { /* 8 bits each of blue, green, red, and alpha. */ pixel.blue=(MagickRealType) ScaleCharToQuantum((unsigned char) ReadBlobByte(image)); pixel.green=(MagickRealType) ScaleCharToQuantum((unsigned char) ReadBlobByte(image)); pixel.red=(MagickRealType) ScaleCharToQuantum((unsigned char) ReadBlobByte(image)); pixel.alpha=(MagickRealType) ScaleCharToQuantum((unsigned char) ReadBlobByte(image)); break; } } image->colormap[i]=pixel; } } /* Convert TGA pixels to pixel packets. */ base=0; flag=0; skip=MagickFalse; index=0; runlength=0; offset=0; for (y=0; y < (ssize_t) image->rows; y++) { q=QueueAuthenticPixels(image,0,offset,image->columns,1,exception); if (q == (Quantum *) NULL) break; for (x=0; x < (ssize_t) image->columns; x++) { if ((tga_info.image_type == TGARLEColormap) || (tga_info.image_type == TGARLERGB) || (tga_info.image_type == TGARLEMonochrome)) { if (runlength != 0) { runlength--; skip=flag != 0; } else { count=ReadBlob(image,1,&runlength); if (count != 1) ThrowReaderException(CorruptImageError,"UnableToReadImageData"); flag=runlength & 0x80; if (flag != 0) runlength-=128; skip=MagickFalse; } } if (skip == MagickFalse) switch (tga_info.bits_per_pixel) { case 8: default: { /* Gray scale. */ if (ReadBlob(image,1,pixels) != 1) ThrowReaderException(CorruptImageError,"UnableToReadImageData"); index=(Quantum) pixels[0]; if (tga_info.colormap_type != 0) pixel=image->colormap[(ssize_t) ConstrainColormapIndex(image, (ssize_t) index,exception)]; else { pixel.red=(MagickRealType) ScaleCharToQuantum((unsigned char) index); pixel.green=(MagickRealType) ScaleCharToQuantum((unsigned char) index); pixel.blue=(MagickRealType) ScaleCharToQuantum((unsigned char) index); } break; } case 15: case 16: { QuantumAny range; /* 5 bits each of RGB. */ if (ReadBlob(image,2,pixels) != 2) ThrowReaderException(CorruptImageError,"UnableToReadImageData"); j=pixels[0]; k=pixels[1]; range=GetQuantumRange(5UL); pixel.red=(MagickRealType) ScaleAnyToQuantum(1UL*(k & 0x7c) >> 2, range); pixel.green=(MagickRealType) ScaleAnyToQuantum((1UL* (k & 0x03) << 3)+(1UL*(j & 0xe0) >> 5),range); pixel.blue=(MagickRealType) ScaleAnyToQuantum(1UL*(j & 0x1f),range); if (image->alpha_trait != UndefinedPixelTrait) pixel.alpha=(MagickRealType) ((k & 0x80) == 0 ? (Quantum) TransparentAlpha : (Quantum) OpaqueAlpha); if (image->storage_class == PseudoClass) index=(Quantum) ConstrainColormapIndex(image,((ssize_t) (k << 8))+ j,exception); break; } case 24: { /* BGR pixels. */ if (ReadBlob(image,3,pixels) != 3) ThrowReaderException(CorruptImageError,"UnableToReadImageData"); pixel.blue=(MagickRealType) ScaleCharToQuantum(pixels[0]); pixel.green=(MagickRealType) ScaleCharToQuantum(pixels[1]); pixel.red=(MagickRealType) ScaleCharToQuantum(pixels[2]); break; } case 32: { /* BGRA pixels. */ if (ReadBlob(image,4,pixels) != 4) ThrowReaderException(CorruptImageError,"UnableToReadImageData"); pixel.blue=(MagickRealType) ScaleCharToQuantum(pixels[0]); pixel.green=(MagickRealType) ScaleCharToQuantum(pixels[1]); pixel.red=(MagickRealType) ScaleCharToQuantum(pixels[2]); pixel.alpha=(MagickRealType) ScaleCharToQuantum(pixels[3]); break; } } if (status == MagickFalse) ThrowReaderException(CorruptImageError,"UnableToReadImageData"); if (image->storage_class == PseudoClass) SetPixelIndex(image,index,q); SetPixelRed(image,ClampToQuantum(pixel.red),q); SetPixelGreen(image,ClampToQuantum(pixel.green),q); SetPixelBlue(image,ClampToQuantum(pixel.blue),q); if (image->alpha_trait != UndefinedPixelTrait) SetPixelAlpha(image,ClampToQuantum(pixel.alpha),q); q+=GetPixelChannels(image); } if (((unsigned char) (tga_info.attributes & 0xc0) >> 6) == 2) offset+=2; else offset++; if (offset >= (ssize_t) image->rows) { base++; offset=base; } if (SyncAuthenticPixels(image,exception) == MagickFalse) break; if (image->previous == (Image *) NULL) { status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y, image->rows); if (status == MagickFalse) break; } } if (EOFBlob(image) != MagickFalse) ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", image->filename); (void) CloseBlob(image); return(GetFirstImageInList(image)); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e g i s t e r T G A I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % RegisterTGAImage() adds properties for the TGA image format to % the list of supported formats. The properties include the image format % tag, a method to read and/or write the format, whether the format % supports the saving of more than one frame to the same file or blob, % whether the format supports native in-memory I/O, and a brief % description of the format. % % The format of the RegisterTGAImage method is: % % size_t RegisterTGAImage(void) % */ ModuleExport size_t RegisterTGAImage(void) { MagickInfo *entry; entry=AcquireMagickInfo("TGA","ICB","Truevision Targa image"); entry->decoder=(DecodeImageHandler *) ReadTGAImage; entry->encoder=(EncodeImageHandler *) WriteTGAImage; entry->flags|=CoderDecoderSeekableStreamFlag; entry->flags^=CoderAdjoinFlag; (void) RegisterMagickInfo(entry); entry=AcquireMagickInfo("TGA","TGA","Truevision Targa image"); entry->decoder=(DecodeImageHandler *) ReadTGAImage; entry->encoder=(EncodeImageHandler *) WriteTGAImage; entry->flags|=CoderDecoderSeekableStreamFlag; entry->flags^=CoderAdjoinFlag; (void) RegisterMagickInfo(entry); entry=AcquireMagickInfo("TGA","VDA","Truevision Targa image"); entry->decoder=(DecodeImageHandler *) ReadTGAImage; entry->encoder=(EncodeImageHandler *) WriteTGAImage; entry->flags|=CoderDecoderSeekableStreamFlag; entry->flags^=CoderAdjoinFlag; (void) RegisterMagickInfo(entry); entry=AcquireMagickInfo("TGA","VST","Truevision Targa image"); entry->decoder=(DecodeImageHandler *) ReadTGAImage; entry->encoder=(EncodeImageHandler *) WriteTGAImage; entry->flags|=CoderDecoderSeekableStreamFlag; entry->flags^=CoderAdjoinFlag; (void) RegisterMagickInfo(entry); return(MagickImageCoderSignature); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % U n r e g i s t e r T G A I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % UnregisterTGAImage() removes format registrations made by the % TGA module from the list of supported formats. % % The format of the UnregisterTGAImage method is: % % UnregisterTGAImage(void) % */ ModuleExport void UnregisterTGAImage(void) { (void) UnregisterMagickInfo("ICB"); (void) UnregisterMagickInfo("TGA"); (void) UnregisterMagickInfo("VDA"); (void) UnregisterMagickInfo("VST"); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % W r i t e T G A I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % WriteTGAImage() writes a image in the Truevision Targa rasterfile % format. % % The format of the WriteTGAImage method is: % % MagickBooleanType WriteTGAImage(const ImageInfo *image_info, % Image *image,ExceptionInfo *exception) % % A description of each parameter follows. % % o image_info: the image info. % % o image: The image. % */ static inline void WriteTGAPixel(Image *image,TGAImageType image_type, const Quantum *p,const QuantumAny range,const double midpoint) { if (image_type == TGAColormap || image_type == TGARLEColormap) (void) WriteBlobByte(image,(unsigned char) ((ssize_t) GetPixelIndex(image,p))); else { if (image_type == TGAMonochrome || image_type == TGARLEMonochrome) (void) WriteBlobByte(image,ScaleQuantumToChar(ClampToQuantum( GetPixelLuma(image,p)))); else if (image->depth == 5) { unsigned char green, value; green=(unsigned char) ScaleQuantumToAny(GetPixelGreen(image,p), range); value=((unsigned char) ScaleQuantumToAny(GetPixelBlue(image,p), range)) | ((green & 0x07) << 5); (void) WriteBlobByte(image,value); value=(((image->alpha_trait != UndefinedPixelTrait) && ((double) GetPixelAlpha(image,p) > midpoint)) ? 0x80 : 0) | ((unsigned char) ScaleQuantumToAny(GetPixelRed(image,p),range) << 2) | ((green & 0x18) >> 3); (void) WriteBlobByte(image,value); } else { (void) WriteBlobByte(image,ScaleQuantumToChar( GetPixelBlue(image,p))); (void) WriteBlobByte(image,ScaleQuantumToChar( GetPixelGreen(image,p))); (void) WriteBlobByte(image,ScaleQuantumToChar( GetPixelRed(image,p))); if (image->alpha_trait != UndefinedPixelTrait) (void) WriteBlobByte(image,ScaleQuantumToChar( GetPixelAlpha(image,p))); } } } static MagickBooleanType WriteTGAImage(const ImageInfo *image_info,Image *image, ExceptionInfo *exception) { CompressionType compression; const char *comment; const double midpoint = QuantumRange/2.0; MagickBooleanType status; QuantumAny range; const Quantum *p; ssize_t x; ssize_t i; unsigned char *q; size_t channels; ssize_t base, count, offset, y; TGAInfo tga_info; /* Open output image file. */ assert(image_info != (const ImageInfo *) NULL); assert(image_info->signature == MagickCoreSignature); assert(image != (Image *) NULL); assert(image->signature == MagickCoreSignature); if (image->debug != MagickFalse) (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); assert(exception != (ExceptionInfo *) NULL); assert(exception->signature == MagickCoreSignature); status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception); if (status == MagickFalse) return(status); /* Initialize TGA raster file header. */ if ((image->columns > 65535L) || (image->rows > 65535L)) ThrowWriterException(ImageError,"WidthOrHeightExceedsLimit"); (void) TransformImageColorspace(image,sRGBColorspace,exception); compression=image->compression; if (image_info->compression != UndefinedCompression) compression=image_info->compression; range=GetQuantumRange(5UL); tga_info.id_length=0; comment=GetImageProperty(image,"comment",exception); if (comment != (const char *) NULL) tga_info.id_length=(unsigned char) MagickMin(strlen(comment),255); tga_info.colormap_type=0; tga_info.colormap_index=0; tga_info.colormap_length=0; tga_info.colormap_size=0; tga_info.x_origin=0; tga_info.y_origin=0; tga_info.width=(unsigned short) image->columns; tga_info.height=(unsigned short) image->rows; tga_info.bits_per_pixel=8; tga_info.attributes=0; if ((image_info->type != TrueColorType) && (image_info->type != TrueColorAlphaType) && (image_info->type != PaletteType) && (image->alpha_trait == UndefinedPixelTrait) && (SetImageGray(image,exception) != MagickFalse)) tga_info.image_type=compression == RLECompression ? TGARLEMonochrome : TGAMonochrome; else if ((image->storage_class == DirectClass) || (image->colors > 256)) { /* Full color TGA raster. */ tga_info.image_type=compression == RLECompression ? TGARLERGB : TGARGB; if (image_info->depth == 5) { tga_info.bits_per_pixel=16; if (image->alpha_trait != UndefinedPixelTrait) tga_info.attributes=1; /* # of alpha bits */ } else { tga_info.bits_per_pixel=24; if (image->alpha_trait != UndefinedPixelTrait) { tga_info.bits_per_pixel=32; tga_info.attributes=8; /* # of alpha bits */ } } } else { /* Colormapped TGA raster. */ tga_info.image_type=compression == RLECompression ? TGARLEColormap : TGAColormap; tga_info.colormap_type=1; tga_info.colormap_length=(unsigned short) image->colors; if (image_info->depth == 5) tga_info.colormap_size=16; else tga_info.colormap_size=24; } if ((image->orientation == BottomRightOrientation) || (image->orientation == TopRightOrientation)) tga_info.attributes|=(1UL << 4); if ((image->orientation == TopLeftOrientation) || (image->orientation == UndefinedOrientation) || (image->orientation == TopRightOrientation)) tga_info.attributes|=(1UL << 5); if ((image->columns > 65535) || (image->rows > 65535)) ThrowWriterException(ImageError,"WidthOrHeightExceedsLimit"); /* Write TGA header. */ (void) WriteBlobByte(image,tga_info.id_length); (void) WriteBlobByte(image,tga_info.colormap_type); (void) WriteBlobByte(image,(unsigned char) tga_info.image_type); (void) WriteBlobLSBShort(image,tga_info.colormap_index); (void) WriteBlobLSBShort(image,tga_info.colormap_length); (void) WriteBlobByte(image,tga_info.colormap_size); (void) WriteBlobLSBShort(image,tga_info.x_origin); (void) WriteBlobLSBShort(image,tga_info.y_origin); (void) WriteBlobLSBShort(image,tga_info.width); (void) WriteBlobLSBShort(image,tga_info.height); (void) WriteBlobByte(image,tga_info.bits_per_pixel); (void) WriteBlobByte(image,tga_info.attributes); if (tga_info.id_length != 0) (void) WriteBlob(image,tga_info.id_length,(unsigned char *) comment); if (tga_info.colormap_type != 0) { unsigned char green, *targa_colormap; /* Dump colormap to file (blue, green, red byte order). */ targa_colormap=(unsigned char *) AcquireQuantumMemory((size_t) tga_info.colormap_length,(tga_info.colormap_size/8)* sizeof(*targa_colormap)); if (targa_colormap == (unsigned char *) NULL) ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed"); q=targa_colormap; for (i=0; i < (ssize_t) image->colors; i++) { if (image_info->depth == 5) { green=(unsigned char) ScaleQuantumToAny(ClampToQuantum( image->colormap[i].green),range); *q++=((unsigned char) ScaleQuantumToAny(ClampToQuantum( image->colormap[i].blue),range)) | ((green & 0x07) << 5); *q++=(((image->alpha_trait != UndefinedPixelTrait) && ((double) ClampToQuantum(image->colormap[i].alpha) > midpoint)) ? 0x80 : 0) | ((unsigned char) ScaleQuantumToAny(ClampToQuantum( image->colormap[i].red),range) << 2) | ((green & 0x18) >> 3); } else { *q++=ScaleQuantumToChar(ClampToQuantum(image->colormap[i].blue)); *q++=ScaleQuantumToChar(ClampToQuantum(image->colormap[i].green)); *q++=ScaleQuantumToChar(ClampToQuantum(image->colormap[i].red)); } } (void) WriteBlob(image,(size_t) ((tga_info.colormap_size/8)* tga_info.colormap_length),targa_colormap); targa_colormap=(unsigned char *) RelinquishMagickMemory(targa_colormap); } /* Convert MIFF to TGA raster pixels. */ base=0; offset=0; channels=GetPixelChannels(image); for (y=0; y < (ssize_t) image->rows; y++) { p=GetVirtualPixels(image,0,offset,image->columns,1,exception); if (p == (const Quantum *) NULL) break; if (compression == RLECompression) { x=0; count=0; while (x < (ssize_t) image->columns) { i=1; while ((i < 128) && (count + i < 128) && ((x + i) < (ssize_t) image->columns)) { if (tga_info.image_type == TGARLEColormap) { if (GetPixelIndex(image,p+(i*channels)) != GetPixelIndex(image,p+((i-1)*channels))) break; } else if (tga_info.image_type == TGARLEMonochrome) { if (GetPixelLuma(image,p+(i*channels)) != GetPixelLuma(image,p+((i-1)*channels))) break; } else { if ((GetPixelBlue(image,p+(i*channels)) != GetPixelBlue(image,p+((i-1)*channels))) || (GetPixelGreen(image,p+(i*channels)) != GetPixelGreen(image,p+((i-1)*channels))) || (GetPixelRed(image,p+(i*channels)) != GetPixelRed(image,p+((i-1)*channels)))) break; if ((image->alpha_trait != UndefinedPixelTrait) && (GetPixelAlpha(image,p+(i*channels)) != GetPixelAlpha(image,p+(i-1)*channels))) break; } i++; } if (i < 3) { count+=i; p+=(i*channels); } if ((i >= 3) || (count == 128) || ((x + i) == (ssize_t) image->columns)) { if (count > 0) { (void) WriteBlobByte(image,(unsigned char) (--count)); while (count >= 0) { WriteTGAPixel(image,tga_info.image_type,p-((count+1)* channels),range,midpoint); count--; } count=0; } } if (i >= 3) { (void) WriteBlobByte(image,(unsigned char) ((i-1) | 0x80)); WriteTGAPixel(image,tga_info.image_type,p,range,midpoint); p+=(i*channels); } x+=i; } } else for (x=0; x < (ssize_t) image->columns; x++) { WriteTGAPixel(image,tga_info.image_type,p,range,midpoint); p+=channels; } if (((unsigned char) (tga_info.attributes & 0xc0) >> 6) == 2) offset+=2; else offset++; if (offset >= (ssize_t) image->rows) { base++; offset=base; } if (image->previous == (Image *) NULL) { status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y, image->rows); if (status == MagickFalse) break; } } (void) CloseBlob(image); return(MagickTrue); }