| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % PPPP CCCC X X % |
| % P P C X X % |
| % PPPP C X % |
| % P C X X % |
| % P CCCC X X % |
| % % |
| % % |
| % Read/Write ZSoft IBM PC Paintbrush Image Format % |
| % % |
| % Software Design % |
| % Cristy % |
| % July 1992 % |
| % % |
| % % |
| % Copyright 1999-2016 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 % |
| % % |
| % http://www.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/attribute.h" |
| #include "MagickCore/blob.h" |
| #include "MagickCore/blob-private.h" |
| #include "MagickCore/cache.h" |
| #include "MagickCore/color.h" |
| #include "MagickCore/color-private.h" |
| #include "MagickCore/colormap.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/memory-private.h" |
| #include "MagickCore/monitor.h" |
| #include "MagickCore/monitor-private.h" |
| #include "MagickCore/pixel-accessor.h" |
| #include "MagickCore/quantum-private.h" |
| #include "MagickCore/static.h" |
| #include "MagickCore/string_.h" |
| #include "MagickCore/module.h" |
| |
| /* |
| Typedef declarations. |
| */ |
| typedef struct _PCXInfo |
| { |
| unsigned char |
| identifier, |
| version, |
| encoding, |
| bits_per_pixel; |
| |
| unsigned short |
| left, |
| top, |
| right, |
| bottom, |
| horizontal_resolution, |
| vertical_resolution; |
| |
| unsigned char |
| reserved, |
| planes; |
| |
| unsigned short |
| bytes_per_line, |
| palette_info, |
| horizontal_screensize, |
| vertical_screensize; |
| |
| unsigned char |
| colormap_signature; |
| } PCXInfo; |
| |
| /* |
| Forward declarations. |
| */ |
| static MagickBooleanType |
| WritePCXImage(const ImageInfo *,Image *,ExceptionInfo *); |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % I s D C X % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % IsDCX() returns MagickTrue if the image format type, identified by the |
| % magick string, is DCX. |
| % |
| % The format of the IsDCX method is: |
| % |
| % MagickBooleanType IsDCX(const unsigned char *magick,const size_t length) |
| % |
| % A description of each parameter follows: |
| % |
| % o magick: compare image format pattern against these bytes. |
| % |
| % o length: Specifies the length of the magick string. |
| % |
| */ |
| static MagickBooleanType IsDCX(const unsigned char *magick,const size_t length) |
| { |
| if (length < 4) |
| return(MagickFalse); |
| if (memcmp(magick,"\261\150\336\72",4) == 0) |
| return(MagickTrue); |
| return(MagickFalse); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % I s P C X % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % IsPCX() returns MagickTrue if the image format type, identified by the |
| % magick string, is PCX. |
| % |
| % The format of the IsPCX method is: |
| % |
| % MagickBooleanType IsPCX(const unsigned char *magick,const size_t length) |
| % |
| % A description of each parameter follows: |
| % |
| % o magick: compare image format pattern against these bytes. |
| % |
| % o length: Specifies the length of the magick string. |
| % |
| */ |
| static MagickBooleanType IsPCX(const unsigned char *magick,const size_t length) |
| { |
| if (length < 2) |
| return(MagickFalse); |
| if (memcmp(magick,"\012\002",2) == 0) |
| return(MagickTrue); |
| if (memcmp(magick,"\012\005",2) == 0) |
| return(MagickTrue); |
| return(MagickFalse); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e a d P C X I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % ReadPCXImage() reads a ZSoft IBM PC Paintbrush 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 ReadPCXImage method is: |
| % |
| % Image *ReadPCXImage(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 *ReadPCXImage(const ImageInfo *image_info,ExceptionInfo *exception) |
| { |
| #define ThrowPCXException(severity,tag) \ |
| { \ |
| scanline=(unsigned char *) RelinquishMagickMemory(scanline); \ |
| pixel_info=RelinquishVirtualMemory(pixel_info); \ |
| ThrowReaderException(severity,tag); \ |
| } |
| |
| Image |
| *image; |
| |
| int |
| bits, |
| id, |
| mask; |
| |
| MagickBooleanType |
| status; |
| |
| MagickOffsetType |
| offset, |
| *page_table; |
| |
| MemoryInfo |
| *pixel_info; |
| |
| PCXInfo |
| pcx_info; |
| |
| register ssize_t |
| x; |
| |
| register Quantum |
| *q; |
| |
| register ssize_t |
| i; |
| |
| register unsigned char |
| *p, |
| *r; |
| |
| size_t |
| one, |
| pcx_packets; |
| |
| ssize_t |
| count, |
| y; |
| |
| unsigned char |
| packet, |
| pcx_colormap[768], |
| *pixels, |
| *scanline; |
| |
| /* |
| 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); |
| } |
| /* |
| Determine if this a PCX file. |
| */ |
| page_table=(MagickOffsetType *) NULL; |
| if (LocaleCompare(image_info->magick,"DCX") == 0) |
| { |
| size_t |
| magic; |
| |
| /* |
| Read the DCX page table. |
| */ |
| magic=ReadBlobLSBLong(image); |
| if (magic != 987654321) |
| ThrowReaderException(CorruptImageError,"ImproperImageHeader"); |
| page_table=(MagickOffsetType *) AcquireQuantumMemory(1024UL, |
| sizeof(*page_table)); |
| if (page_table == (MagickOffsetType *) NULL) |
| ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); |
| for (id=0; id < 1024; id++) |
| { |
| page_table[id]=(MagickOffsetType) ReadBlobLSBLong(image); |
| if (page_table[id] == 0) |
| break; |
| } |
| } |
| if (page_table != (MagickOffsetType *) NULL) |
| { |
| offset=SeekBlob(image,(MagickOffsetType) page_table[0],SEEK_SET); |
| if (offset < 0) |
| ThrowReaderException(CorruptImageError,"ImproperImageHeader"); |
| } |
| count=ReadBlob(image,1,&pcx_info.identifier); |
| for (id=1; id < 1024; id++) |
| { |
| int |
| bits_per_pixel; |
| |
| /* |
| Verify PCX identifier. |
| */ |
| pcx_info.version=(unsigned char) ReadBlobByte(image); |
| if ((count != 1) || (pcx_info.identifier != 0x0a)) |
| ThrowReaderException(CorruptImageError,"ImproperImageHeader"); |
| pcx_info.encoding=(unsigned char) ReadBlobByte(image); |
| bits_per_pixel=ReadBlobByte(image); |
| if (bits_per_pixel == -1) |
| ThrowReaderException(CorruptImageError,"ImproperImageHeader"); |
| pcx_info.bits_per_pixel=(unsigned char) bits_per_pixel; |
| pcx_info.left=ReadBlobLSBShort(image); |
| pcx_info.top=ReadBlobLSBShort(image); |
| pcx_info.right=ReadBlobLSBShort(image); |
| pcx_info.bottom=ReadBlobLSBShort(image); |
| pcx_info.horizontal_resolution=ReadBlobLSBShort(image); |
| pcx_info.vertical_resolution=ReadBlobLSBShort(image); |
| /* |
| Read PCX raster colormap. |
| */ |
| image->columns=(size_t) MagickAbsoluteValue((ssize_t) pcx_info.right- |
| pcx_info.left)+1UL; |
| image->rows=(size_t) MagickAbsoluteValue((ssize_t) pcx_info.bottom- |
| pcx_info.top)+1UL; |
| if ((image->columns == 0) || (image->rows == 0) || |
| ((pcx_info.bits_per_pixel != 1) && |
| (pcx_info.bits_per_pixel != 2) && |
| (pcx_info.bits_per_pixel != 4) && |
| (pcx_info.bits_per_pixel != 8))) |
| ThrowReaderException(CorruptImageError,"ImproperImageHeader"); |
| image->depth=pcx_info.bits_per_pixel; |
| image->units=PixelsPerInchResolution; |
| image->resolution.x=(double) pcx_info.horizontal_resolution; |
| image->resolution.y=(double) pcx_info.vertical_resolution; |
| image->colors=16; |
| count=ReadBlob(image,3*image->colors,pcx_colormap); |
| if (count != (ssize_t) (3*image->colors)) |
| ThrowReaderException(CorruptImageError,"ImproperImageHeader"); |
| pcx_info.reserved=(unsigned char) ReadBlobByte(image); |
| pcx_info.planes=(unsigned char) ReadBlobByte(image); |
| if ((pcx_info.bits_per_pixel*pcx_info.planes) >= 64) |
| ThrowReaderException(CorruptImageError,"ImproperImageHeader"); |
| one=1; |
| if ((pcx_info.bits_per_pixel != 8) || (pcx_info.planes == 1)) |
| if ((pcx_info.version == 3) || (pcx_info.version == 5) || |
| ((pcx_info.bits_per_pixel*pcx_info.planes) == 1)) |
| image->colors=(size_t) MagickMin(one << (1UL* |
| (pcx_info.bits_per_pixel*pcx_info.planes)),256UL); |
| if (AcquireImageColormap(image,image->colors,exception) == MagickFalse) |
| ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); |
| if ((pcx_info.bits_per_pixel >= 8) && (pcx_info.planes != 1)) |
| image->storage_class=DirectClass; |
| p=pcx_colormap; |
| for (i=0; i < (ssize_t) image->colors; i++) |
| { |
| image->colormap[i].red=ScaleCharToQuantum(*p++); |
| image->colormap[i].green=ScaleCharToQuantum(*p++); |
| image->colormap[i].blue=ScaleCharToQuantum(*p++); |
| } |
| pcx_info.bytes_per_line=ReadBlobLSBShort(image); |
| pcx_info.palette_info=ReadBlobLSBShort(image); |
| pcx_info.horizontal_screensize=ReadBlobLSBShort(image); |
| pcx_info.vertical_screensize=ReadBlobLSBShort(image); |
| for (i=0; i < 54; i++) |
| (void) ReadBlobByte(image); |
| if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0)) |
| if (image->scene >= (image_info->scene+image_info->number_scenes-1)) |
| break; |
| status=SetImageExtent(image,image->columns,image->rows,exception); |
| if (status == MagickFalse) |
| return(DestroyImageList(image)); |
| /* |
| Read image data. |
| */ |
| if (HeapOverflowSanityCheck(image->rows, (size_t) pcx_info.bytes_per_line) != MagickFalse) |
| ThrowReaderException(CorruptImageError,"ImproperImageHeader"); |
| pcx_packets=(size_t) image->rows*pcx_info.bytes_per_line; |
| if (HeapOverflowSanityCheck(pcx_packets, (size_t)pcx_info.planes) != MagickFalse) |
| ThrowReaderException(CorruptImageError,"ImproperImageHeader"); |
| pcx_packets=(size_t) pcx_packets*pcx_info.planes; |
| if ((size_t) (pcx_info.bits_per_pixel*pcx_info.planes*image->columns) > |
| (pcx_packets*8U)) |
| ThrowReaderException(CorruptImageError,"ImproperImageHeader"); |
| scanline=(unsigned char *) AcquireQuantumMemory(MagickMax(image->columns, |
| pcx_info.bytes_per_line),MagickMax(8,pcx_info.planes)*sizeof(*scanline)); |
| pixel_info=AcquireVirtualMemory(pcx_packets,2*sizeof(*pixels)); |
| if ((scanline == (unsigned char *) NULL) || |
| (pixel_info == (MemoryInfo *) NULL)) |
| { |
| if (scanline != (unsigned char *) NULL) |
| scanline=(unsigned char *) RelinquishMagickMemory(scanline); |
| if (pixel_info != (MemoryInfo *) NULL) |
| pixel_info=RelinquishVirtualMemory(pixel_info); |
| ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); |
| } |
| pixels=(unsigned char *) GetVirtualMemoryBlob(pixel_info); |
| /* |
| Uncompress image data. |
| */ |
| p=pixels; |
| if (pcx_info.encoding == 0) |
| while (pcx_packets != 0) |
| { |
| packet=(unsigned char) ReadBlobByte(image); |
| if (EOFBlob(image) != MagickFalse) |
| ThrowPCXException(CorruptImageError,"UnexpectedEndOfFile"); |
| *p++=packet; |
| pcx_packets--; |
| } |
| else |
| while (pcx_packets != 0) |
| { |
| packet=(unsigned char) ReadBlobByte(image); |
| if (EOFBlob(image) != MagickFalse) |
| ThrowPCXException(CorruptImageError,"UnexpectedEndOfFile"); |
| if ((packet & 0xc0) != 0xc0) |
| { |
| *p++=packet; |
| pcx_packets--; |
| continue; |
| } |
| count=(ssize_t) (packet & 0x3f); |
| packet=(unsigned char) ReadBlobByte(image); |
| if (EOFBlob(image) != MagickFalse) |
| ThrowPCXException(CorruptImageError,"UnexpectedEndOfFile"); |
| for ( ; count != 0; count--) |
| { |
| *p++=packet; |
| pcx_packets--; |
| if (pcx_packets == 0) |
| break; |
| } |
| } |
| if (image->storage_class == DirectClass) |
| image->alpha_trait=pcx_info.planes > 3 ? BlendPixelTrait : |
| UndefinedPixelTrait; |
| else |
| if ((pcx_info.version == 5) || |
| ((pcx_info.bits_per_pixel*pcx_info.planes) == 1)) |
| { |
| /* |
| Initialize image colormap. |
| */ |
| if (image->colors > 256) |
| ThrowPCXException(CorruptImageError,"ColormapExceeds256Colors"); |
| if ((pcx_info.bits_per_pixel*pcx_info.planes) == 1) |
| { |
| /* |
| Monochrome colormap. |
| */ |
| image->colormap[0].red=(Quantum) 0; |
| image->colormap[0].green=(Quantum) 0; |
| image->colormap[0].blue=(Quantum) 0; |
| image->colormap[1].red=QuantumRange; |
| image->colormap[1].green=QuantumRange; |
| image->colormap[1].blue=QuantumRange; |
| } |
| else |
| if (image->colors > 16) |
| { |
| /* |
| 256 color images have their color map at the end of the file. |
| */ |
| pcx_info.colormap_signature=(unsigned char) ReadBlobByte(image); |
| count=ReadBlob(image,3*image->colors,pcx_colormap); |
| p=pcx_colormap; |
| for (i=0; i < (ssize_t) image->colors; i++) |
| { |
| image->colormap[i].red=ScaleCharToQuantum(*p++); |
| image->colormap[i].green=ScaleCharToQuantum(*p++); |
| image->colormap[i].blue=ScaleCharToQuantum(*p++); |
| } |
| } |
| } |
| /* |
| Convert PCX raster image to pixel packets. |
| */ |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| p=pixels+(y*pcx_info.bytes_per_line*pcx_info.planes); |
| q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); |
| if (q == (Quantum *) NULL) |
| break; |
| r=scanline; |
| if (image->storage_class == DirectClass) |
| for (i=0; i < pcx_info.planes; i++) |
| { |
| r=scanline+i; |
| for (x=0; x < (ssize_t) pcx_info.bytes_per_line; x++) |
| { |
| switch (i) |
| { |
| case 0: |
| { |
| *r=(*p++); |
| break; |
| } |
| case 1: |
| { |
| *r=(*p++); |
| break; |
| } |
| case 2: |
| { |
| *r=(*p++); |
| break; |
| } |
| case 3: |
| default: |
| { |
| *r=(*p++); |
| break; |
| } |
| } |
| r+=pcx_info.planes; |
| } |
| } |
| else |
| if (pcx_info.planes > 1) |
| { |
| for (x=0; x < (ssize_t) image->columns; x++) |
| *r++=0; |
| for (i=0; i < pcx_info.planes; i++) |
| { |
| r=scanline; |
| for (x=0; x < (ssize_t) pcx_info.bytes_per_line; x++) |
| { |
| bits=(*p++); |
| for (mask=0x80; mask != 0; mask>>=1) |
| { |
| if (bits & mask) |
| *r|=1 << i; |
| r++; |
| } |
| } |
| } |
| } |
| else |
| switch (pcx_info.bits_per_pixel) |
| { |
| case 1: |
| { |
| register ssize_t |
| bit; |
| |
| for (x=0; x < ((ssize_t) image->columns-7); x+=8) |
| { |
| for (bit=7; bit >= 0; bit--) |
| *r++=(unsigned char) ((*p) & (0x01 << bit) ? 0x01 : 0x00); |
| p++; |
| } |
| if ((image->columns % 8) != 0) |
| { |
| for (bit=7; bit >= (ssize_t) (8-(image->columns % 8)); bit--) |
| *r++=(unsigned char) ((*p) & (0x01 << bit) ? 0x01 : 0x00); |
| p++; |
| } |
| break; |
| } |
| case 2: |
| { |
| for (x=0; x < ((ssize_t) image->columns-3); x+=4) |
| { |
| *r++=(*p >> 6) & 0x3; |
| *r++=(*p >> 4) & 0x3; |
| *r++=(*p >> 2) & 0x3; |
| *r++=(*p) & 0x3; |
| p++; |
| } |
| if ((image->columns % 4) != 0) |
| { |
| for (i=3; i >= (ssize_t) (4-(image->columns % 4)); i--) |
| *r++=(unsigned char) ((*p >> (i*2)) & 0x03); |
| p++; |
| } |
| break; |
| } |
| case 4: |
| { |
| for (x=0; x < ((ssize_t) image->columns-1); x+=2) |
| { |
| *r++=(*p >> 4) & 0xf; |
| *r++=(*p) & 0xf; |
| p++; |
| } |
| if ((image->columns % 2) != 0) |
| *r++=(*p++ >> 4) & 0xf; |
| break; |
| } |
| case 8: |
| { |
| (void) CopyMagickMemory(r,p,image->columns); |
| break; |
| } |
| default: |
| break; |
| } |
| /* |
| Transfer image scanline. |
| */ |
| r=scanline; |
| for (x=0; x < (ssize_t) image->columns; x++) |
| { |
| if (image->storage_class == PseudoClass) |
| SetPixelIndex(image,*r++,q); |
| else |
| { |
| SetPixelRed(image,ScaleCharToQuantum(*r++),q); |
| SetPixelGreen(image,ScaleCharToQuantum(*r++),q); |
| SetPixelBlue(image,ScaleCharToQuantum(*r++),q); |
| if (image->alpha_trait != UndefinedPixelTrait) |
| SetPixelAlpha(image,ScaleCharToQuantum(*r++),q); |
| } |
| q+=GetPixelChannels(image); |
| } |
| if (SyncAuthenticPixels(image,exception) == MagickFalse) |
| break; |
| if (image->previous == (Image *) NULL) |
| { |
| status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y, |
| image->rows); |
| if (status == MagickFalse) |
| break; |
| } |
| } |
| if (image->storage_class == PseudoClass) |
| (void) SyncImage(image,exception); |
| scanline=(unsigned char *) RelinquishMagickMemory(scanline); |
| pixel_info=RelinquishVirtualMemory(pixel_info); |
| if (EOFBlob(image) != MagickFalse) |
| { |
| ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", |
| image->filename); |
| break; |
| } |
| /* |
| Proceed to next image. |
| */ |
| if (image_info->number_scenes != 0) |
| if (image->scene >= (image_info->scene+image_info->number_scenes-1)) |
| break; |
| if (page_table == (MagickOffsetType *) NULL) |
| break; |
| if (page_table[id] == 0) |
| break; |
| offset=SeekBlob(image,(MagickOffsetType) page_table[id],SEEK_SET); |
| if (offset < 0) |
| ThrowReaderException(CorruptImageError,"ImproperImageHeader"); |
| count=ReadBlob(image,1,&pcx_info.identifier); |
| if ((count != 0) && (pcx_info.identifier == 0x0a)) |
| { |
| /* |
| Allocate next image structure. |
| */ |
| AcquireNextImage(image_info,image,exception); |
| if (GetNextImageInList(image) == (Image *) NULL) |
| { |
| image=DestroyImageList(image); |
| return((Image *) NULL); |
| } |
| image=SyncNextImageInList(image); |
| status=SetImageProgress(image,LoadImagesTag,TellBlob(image), |
| GetBlobSize(image)); |
| if (status == MagickFalse) |
| break; |
| } |
| } |
| if (page_table != (MagickOffsetType *) NULL) |
| page_table=(MagickOffsetType *) RelinquishMagickMemory(page_table); |
| (void) CloseBlob(image); |
| return(GetFirstImageInList(image)); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e g i s t e r P C X I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % RegisterPCXImage() adds attributes for the PCX image format to |
| % the list of supported formats. The attributes 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 RegisterPCXImage method is: |
| % |
| % size_t RegisterPCXImage(void) |
| % |
| */ |
| ModuleExport size_t RegisterPCXImage(void) |
| { |
| MagickInfo |
| *entry; |
| |
| entry=AcquireMagickInfo("PCX","DCX","ZSoft IBM PC multi-page Paintbrush"); |
| entry->decoder=(DecodeImageHandler *) ReadPCXImage; |
| entry->encoder=(EncodeImageHandler *) WritePCXImage; |
| entry->flags|=CoderSeekableStreamFlag; |
| entry->magick=(IsImageFormatHandler *) IsDCX; |
| (void) RegisterMagickInfo(entry); |
| entry=AcquireMagickInfo("PCX","PCX","ZSoft IBM PC Paintbrush"); |
| entry->decoder=(DecodeImageHandler *) ReadPCXImage; |
| entry->encoder=(EncodeImageHandler *) WritePCXImage; |
| entry->magick=(IsImageFormatHandler *) IsPCX; |
| entry->flags^=CoderAdjoinFlag; |
| entry->flags|=CoderSeekableStreamFlag; |
| (void) RegisterMagickInfo(entry); |
| return(MagickImageCoderSignature); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % U n r e g i s t e r P C X I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % UnregisterPCXImage() removes format registrations made by the |
| % PCX module from the list of supported formats. |
| % |
| % The format of the UnregisterPCXImage method is: |
| % |
| % UnregisterPCXImage(void) |
| % |
| */ |
| ModuleExport void UnregisterPCXImage(void) |
| { |
| (void) UnregisterMagickInfo("DCX"); |
| (void) UnregisterMagickInfo("PCX"); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % W r i t e P C X I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % WritePCXImage() writes an image in the ZSoft IBM PC Paintbrush file |
| % format. |
| % |
| % The format of the WritePCXImage method is: |
| % |
| % MagickBooleanType WritePCXImage(const ImageInfo *image_info, |
| % Image *image,ExceptionInfo *exception) |
| % |
| % A description of each parameter follows. |
| % |
| % o image_info: the image info. |
| % |
| % o image: The image. |
| % |
| % o exception: return any errors or warnings in this structure. |
| % |
| */ |
| |
| static MagickBooleanType PCXWritePixels(PCXInfo *pcx_info, |
| const unsigned char *pixels,Image *image) |
| { |
| register const unsigned char |
| *q; |
| |
| register ssize_t |
| i, |
| x; |
| |
| ssize_t |
| count; |
| |
| unsigned char |
| packet, |
| previous; |
| |
| q=pixels; |
| for (i=0; i < (ssize_t) pcx_info->planes; i++) |
| { |
| if (pcx_info->encoding == 0) |
| { |
| for (x=0; x < (ssize_t) pcx_info->bytes_per_line; x++) |
| (void) WriteBlobByte(image,(unsigned char) (*q++)); |
| } |
| else |
| { |
| previous=(*q++); |
| count=1; |
| for (x=0; x < (ssize_t) (pcx_info->bytes_per_line-1); x++) |
| { |
| packet=(*q++); |
| if ((packet == previous) && (count < 63)) |
| { |
| count++; |
| continue; |
| } |
| if ((count > 1) || ((previous & 0xc0) == 0xc0)) |
| { |
| count|=0xc0; |
| (void) WriteBlobByte(image,(unsigned char) count); |
| } |
| (void) WriteBlobByte(image,previous); |
| previous=packet; |
| count=1; |
| } |
| if ((count > 1) || ((previous & 0xc0) == 0xc0)) |
| { |
| count|=0xc0; |
| (void) WriteBlobByte(image,(unsigned char) count); |
| } |
| (void) WriteBlobByte(image,previous); |
| } |
| } |
| return (MagickTrue); |
| } |
| |
| static MagickBooleanType WritePCXImage(const ImageInfo *image_info,Image *image, |
| ExceptionInfo *exception) |
| { |
| MagickBooleanType |
| status; |
| |
| MagickOffsetType |
| offset, |
| *page_table, |
| scene; |
| |
| MemoryInfo |
| *pixel_info; |
| |
| PCXInfo |
| pcx_info; |
| |
| register const Quantum |
| *p; |
| |
| register ssize_t |
| i, |
| x; |
| |
| register unsigned char |
| *q; |
| |
| size_t |
| length; |
| |
| ssize_t |
| y; |
| |
| unsigned char |
| *pcx_colormap, |
| *pixels; |
| |
| /* |
| 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); |
| (void) TransformImageColorspace(image,sRGBColorspace,exception); |
| page_table=(MagickOffsetType *) NULL; |
| if ((LocaleCompare(image_info->magick,"DCX") == 0) || |
| ((GetNextImageInList(image) != (Image *) NULL) && |
| (image_info->adjoin != MagickFalse))) |
| { |
| /* |
| Write the DCX page table. |
| */ |
| (void) WriteBlobLSBLong(image,0x3ADE68B1L); |
| page_table=(MagickOffsetType *) AcquireQuantumMemory(1024UL, |
| sizeof(*page_table)); |
| if (page_table == (MagickOffsetType *) NULL) |
| ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed"); |
| for (scene=0; scene < 1024; scene++) |
| (void) WriteBlobLSBLong(image,0x00000000L); |
| } |
| scene=0; |
| do |
| { |
| if (page_table != (MagickOffsetType *) NULL) |
| page_table[scene]=TellBlob(image); |
| /* |
| Initialize PCX raster file header. |
| */ |
| pcx_info.identifier=0x0a; |
| pcx_info.version=5; |
| pcx_info.encoding=image_info->compression == NoCompression ? 0 : 1; |
| pcx_info.bits_per_pixel=8; |
| if ((image->storage_class == PseudoClass) && |
| (SetImageMonochrome(image,exception) != MagickFalse)) |
| pcx_info.bits_per_pixel=1; |
| pcx_info.left=0; |
| pcx_info.top=0; |
| pcx_info.right=(unsigned short) (image->columns-1); |
| pcx_info.bottom=(unsigned short) (image->rows-1); |
| switch (image->units) |
| { |
| case UndefinedResolution: |
| case PixelsPerInchResolution: |
| default: |
| { |
| pcx_info.horizontal_resolution=(unsigned short) image->resolution.x; |
| pcx_info.vertical_resolution=(unsigned short) image->resolution.y; |
| break; |
| } |
| case PixelsPerCentimeterResolution: |
| { |
| pcx_info.horizontal_resolution=(unsigned short) |
| (2.54*image->resolution.x+0.5); |
| pcx_info.vertical_resolution=(unsigned short) |
| (2.54*image->resolution.y+0.5); |
| break; |
| } |
| } |
| pcx_info.reserved=0; |
| pcx_info.planes=1; |
| if ((image->storage_class == DirectClass) || (image->colors > 256)) |
| { |
| pcx_info.planes=3; |
| if (image->alpha_trait != UndefinedPixelTrait) |
| pcx_info.planes++; |
| } |
| pcx_info.bytes_per_line=(unsigned short) (((size_t) image->columns* |
| pcx_info.bits_per_pixel+7)/8); |
| pcx_info.palette_info=1; |
| pcx_info.colormap_signature=0x0c; |
| /* |
| Write PCX header. |
| */ |
| (void) WriteBlobByte(image,pcx_info.identifier); |
| (void) WriteBlobByte(image,pcx_info.version); |
| (void) WriteBlobByte(image,pcx_info.encoding); |
| (void) WriteBlobByte(image,pcx_info.bits_per_pixel); |
| (void) WriteBlobLSBShort(image,pcx_info.left); |
| (void) WriteBlobLSBShort(image,pcx_info.top); |
| (void) WriteBlobLSBShort(image,pcx_info.right); |
| (void) WriteBlobLSBShort(image,pcx_info.bottom); |
| (void) WriteBlobLSBShort(image,pcx_info.horizontal_resolution); |
| (void) WriteBlobLSBShort(image,pcx_info.vertical_resolution); |
| /* |
| Dump colormap to file. |
| */ |
| pcx_colormap=(unsigned char *) AcquireQuantumMemory(256UL, |
| 3*sizeof(*pcx_colormap)); |
| if (pcx_colormap == (unsigned char *) NULL) |
| ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed"); |
| (void) memset(pcx_colormap,0,3*256*sizeof(*pcx_colormap)); |
| q=pcx_colormap; |
| if ((image->storage_class == PseudoClass) && (image->colors <= 256)) |
| for (i=0; i < (ssize_t) image->colors; i++) |
| { |
| *q++=ScaleQuantumToChar(image->colormap[i].red); |
| *q++=ScaleQuantumToChar(image->colormap[i].green); |
| *q++=ScaleQuantumToChar(image->colormap[i].blue); |
| } |
| (void) WriteBlob(image,3*16,(const unsigned char *) pcx_colormap); |
| (void) WriteBlobByte(image,pcx_info.reserved); |
| (void) WriteBlobByte(image,pcx_info.planes); |
| (void) WriteBlobLSBShort(image,pcx_info.bytes_per_line); |
| (void) WriteBlobLSBShort(image,pcx_info.palette_info); |
| for (i=0; i < 58; i++) |
| (void) WriteBlobByte(image,'\0'); |
| length=(size_t) pcx_info.bytes_per_line; |
| pixel_info=AcquireVirtualMemory(length,pcx_info.planes*sizeof(*pixels)); |
| if (pixel_info == (MemoryInfo *) NULL) |
| ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed"); |
| pixels=(unsigned char *) GetVirtualMemoryBlob(pixel_info); |
| q=pixels; |
| if ((image->storage_class == DirectClass) || (image->colors > 256)) |
| { |
| /* |
| Convert DirectClass image to PCX raster pixels. |
| */ |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| q=pixels; |
| for (i=0; i < pcx_info.planes; i++) |
| { |
| p=GetVirtualPixels(image,0,y,image->columns,1,exception); |
| if (p == (const Quantum *) NULL) |
| break; |
| switch ((int) i) |
| { |
| case 0: |
| { |
| for (x=0; x < (ssize_t) pcx_info.bytes_per_line; x++) |
| { |
| *q++=ScaleQuantumToChar(GetPixelRed(image,p)); |
| p+=GetPixelChannels(image); |
| } |
| break; |
| } |
| case 1: |
| { |
| for (x=0; x < (ssize_t) pcx_info.bytes_per_line; x++) |
| { |
| *q++=ScaleQuantumToChar(GetPixelGreen(image,p)); |
| p+=GetPixelChannels(image); |
| } |
| break; |
| } |
| case 2: |
| { |
| for (x=0; x < (ssize_t) pcx_info.bytes_per_line; x++) |
| { |
| *q++=ScaleQuantumToChar(GetPixelBlue(image,p)); |
| p+=GetPixelChannels(image); |
| } |
| break; |
| } |
| case 3: |
| default: |
| { |
| for (x=(ssize_t) pcx_info.bytes_per_line; x != 0; x--) |
| { |
| *q++=ScaleQuantumToChar((Quantum) (GetPixelAlpha(image,p))); |
| p+=GetPixelChannels(image); |
| } |
| break; |
| } |
| } |
| } |
| if (PCXWritePixels(&pcx_info,pixels,image) == MagickFalse) |
| break; |
| if (image->previous == (Image *) NULL) |
| { |
| status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y, |
| image->rows); |
| if (status == MagickFalse) |
| break; |
| } |
| } |
| } |
| else |
| { |
| if (pcx_info.bits_per_pixel > 1) |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| p=GetVirtualPixels(image,0,y,image->columns,1,exception); |
| if (p == (const Quantum *) NULL) |
| break; |
| q=pixels; |
| for (x=0; x < (ssize_t) image->columns; x++) |
| { |
| *q++=(unsigned char) GetPixelIndex(image,p); |
| p+=GetPixelChannels(image); |
| } |
| if (PCXWritePixels(&pcx_info,pixels,image) == MagickFalse) |
| break; |
| if (image->previous == (Image *) NULL) |
| { |
| status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y, |
| image->rows); |
| if (status == MagickFalse) |
| break; |
| } |
| } |
| else |
| { |
| register unsigned char |
| bit, |
| byte; |
| |
| /* |
| Convert PseudoClass image to a PCX monochrome image. |
| */ |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| p=GetVirtualPixels(image,0,y,image->columns,1,exception); |
| if (p == (const Quantum *) NULL) |
| break; |
| bit=0; |
| byte=0; |
| q=pixels; |
| for (x=0; x < (ssize_t) image->columns; x++) |
| { |
| byte<<=1; |
| if (GetPixelLuma(image,p) >= (QuantumRange/2.0)) |
| byte|=0x01; |
| bit++; |
| if (bit == 8) |
| { |
| *q++=byte; |
| bit=0; |
| byte=0; |
| } |
| p+=GetPixelChannels(image); |
| } |
| if (bit != 0) |
| *q++=byte << (8-bit); |
| if (PCXWritePixels(&pcx_info,pixels,image) == MagickFalse) |
| break; |
| if (image->previous == (Image *) NULL) |
| { |
| status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) |
| y,image->rows); |
| if (status == MagickFalse) |
| break; |
| } |
| } |
| } |
| (void) WriteBlobByte(image,pcx_info.colormap_signature); |
| (void) WriteBlob(image,3*256,pcx_colormap); |
| } |
| pixel_info=RelinquishVirtualMemory(pixel_info); |
| pcx_colormap=(unsigned char *) RelinquishMagickMemory(pcx_colormap); |
| if (page_table == (MagickOffsetType *) NULL) |
| break; |
| if (scene >= 1023) |
| break; |
| if (GetNextImageInList(image) == (Image *) NULL) |
| break; |
| image=SyncNextImageInList(image); |
| status=SetImageProgress(image,SaveImagesTag,scene++, |
| GetImageListLength(image)); |
| if (status == MagickFalse) |
| break; |
| } while (image_info->adjoin != MagickFalse); |
| if (page_table != (MagickOffsetType *) NULL) |
| { |
| /* |
| Write the DCX page table. |
| */ |
| page_table[scene+1]=0; |
| offset=SeekBlob(image,0L,SEEK_SET); |
| if (offset < 0) |
| ThrowWriterException(CorruptImageError,"ImproperImageHeader"); |
| (void) WriteBlobLSBLong(image,0x3ADE68B1L); |
| for (i=0; i <= (ssize_t) scene; i++) |
| (void) WriteBlobLSBLong(image,(unsigned int) page_table[i]); |
| page_table=(MagickOffsetType *) RelinquishMagickMemory(page_table); |
| } |
| if (status == MagickFalse) |
| { |
| char |
| *message; |
| |
| message=GetExceptionMessage(errno); |
| (void) ThrowMagickException(exception,GetMagickModule(),FileOpenError, |
| "UnableToWriteFile","`%s': %s",image->filename,message); |
| message=DestroyString(message); |
| } |
| (void) CloseBlob(image); |
| return(MagickTrue); |
| } |