500 lines
21 KiB
Plaintext
500 lines
21 KiB
Plaintext
{
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$Id: ImagingTypes.pas 171 2009-09-02 01:34:19Z galfar $
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Vampyre Imaging Library
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by Marek Mauder
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http://imaginglib.sourceforge.net
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The contents of this file are used with permission, subject to the Mozilla
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Public License Version 1.1 (the "License"); you may not use this file except
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in compliance with the License. You may obtain a copy of the License at
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http://www.mozilla.org/MPL/MPL-1.1.html
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Software distributed under the License is distributed on an "AS IS" basis,
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WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
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the specific language governing rights and limitations under the License.
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Alternatively, the contents of this file may be used under the terms of the
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GNU Lesser General Public License (the "LGPL License"), in which case the
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provisions of the LGPL License are applicable instead of those above.
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If you wish to allow use of your version of this file only under the terms
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of the LGPL License and not to allow others to use your version of this file
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under the MPL, indicate your decision by deleting the provisions above and
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replace them with the notice and other provisions required by the LGPL
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License. If you do not delete the provisions above, a recipient may use
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your version of this file under either the MPL or the LGPL License.
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For more information about the LGPL: http://www.gnu.org/copyleft/lesser.html
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}
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{ This unit contains basic types and constants used by Imaging library.}
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unit ImagingTypes;
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{$I ImagingOptions.inc}
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interface
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const
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{ Current Major version of Imaging.}
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ImagingVersionMajor = 0;
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{ Current Minor version of Imaging.}
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ImagingVersionMinor = 26;
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{ Current patch of Imaging.}
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ImagingVersionPatch = 4;
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{ Imaging Option Ids whose values can be set/get by SetOption/
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GetOption functions.}
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{ Defines Jpeg compression quality, ranges from 1 (ugly/small) to 100 (nice/large).
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Default value is 90.}
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ImagingJpegQuality = 10;
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{ Specifies whether Jpeg images are saved in progressive format,
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can be 0 or 1. Default value is 0.}
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ImagingJpegProgressive = 11;
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{ Specifies whether Windows Bitmaps are saved using RLE compression
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(only for 1/4/8 bit images), can be 0 or 1. Default value is 1.}
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ImagingBitmapRLE = 12;
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{ Specifies whether Targa images are saved using RLE compression,
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can be 0 or 1. Default value is 0.}
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ImagingTargaRLE = 13;
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{ Value of this option is non-zero if last loaded DDS file was cube map.}
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ImagingDDSLoadedCubeMap = 14;
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{ Value of this option is non-zero if last loaded DDS file was volume texture.}
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ImagingDDSLoadedVolume = 15;
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{ Value of this option is number of mipmap levels of last loaded DDS image.}
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ImagingDDSLoadedMipMapCount = 16;
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{ Value of this option is depth (slices of volume texture or faces of
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cube map) of last loaded DDS image.}
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ImagingDDSLoadedDepth = 17;
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{ If it is non-zero next saved DDS file should be stored as cube map.}
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ImagingDDSSaveCubeMap = 18;
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{ If it is non-zero next saved DDS file should be stored as volume texture.}
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ImagingDDSSaveVolume = 19;
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{ Sets the number of mipmaps which should be stored in the next saved DDS file.
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Only applies to cube maps and volumes, ordinary 2D textures save all
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levels present in input.}
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ImagingDDSSaveMipMapCount = 20;
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{ Sets the depth (slices of volume texture or faces of cube map)
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of the next saved DDS file.}
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ImagingDDSSaveDepth = 21;
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{ Sets precompression filter used when saving PNG images. Allowed values
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are: 0 (none), 1 (sub), 2 (up), 3 (average), 4 (paeth),
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5 (use 0 for indexed/gray images and 4 for RGB/ARGB images),
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6 (adaptive filtering - use best filter for each scanline - very slow).
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Note that filters 3 and 4 are much slower than filters 1 and 2.
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Default value is 5.}
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ImagingPNGPreFilter = 25;
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{ Sets ZLib compression level used when saving PNG images.
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Allowed values are in range 0 (no compresstion) to 9 (best compression).
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Default value is 5.}
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ImagingPNGCompressLevel = 26;
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{ Boolean option that specifies whether PNG images with more frames (APNG format)
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are animated by Imaging (according to frame disposal/blend methods) or just
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raw frames are loaded and sent to user (if you want to animate APNG yourself).
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Default value is 1.}
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ImagingPNGLoadAnimated = 27;
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{ Specifies whether MNG animation frames are saved with lossy or lossless
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compression. Lossless frames are saved as PNG images and lossy frames are
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saved as JNG images. Allowed values are 0 (False) and 1 (True).
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Default value is 0.}
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ImagingMNGLossyCompression = 28;
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{ Defines whether alpha channel of lossy compressed MNG frames
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(when ImagingMNGLossyCompression is 1) is lossy compressed too.
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Allowed values are 0 (False) and 1 (True). Default value is 0.}
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ImagingMNGLossyAlpha = 29;
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{ Sets precompression filter used when saving MNG frames as PNG images.
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For details look at ImagingPNGPreFilter.}
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ImagingMNGPreFilter = 30;
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{ Sets ZLib compression level used when saving MNG frames as PNG images.
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For details look at ImagingPNGCompressLevel.}
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ImagingMNGCompressLevel = 31;
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{ Specifies compression quality used when saving MNG frames as JNG images.
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For details look at ImagingJpegQuality.}
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ImagingMNGQuality = 32;
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{ Specifies whether images are saved in progressive format when saving MNG
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frames as JNG images. For details look at ImagingJpegProgressive.}
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ImagingMNGProgressive = 33;
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{ Specifies whether alpha channels of JNG images are lossy compressed.
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Allowed values are 0 (False) and 1 (True). Default value is 0.}
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ImagingJNGLossyAlpha = 40;
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{ Sets precompression filter used when saving lossless alpha channels.
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For details look at ImagingPNGPreFilter.}
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ImagingJNGAlphaPreFilter = 41;
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{ Sets ZLib compression level used when saving lossless alpha channels.
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For details look at ImagingPNGCompressLevel.}
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ImagingJNGAlphaCompressLevel = 42;
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{ Defines compression quality used when saving JNG images (and lossy alpha channels).
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For details look at ImagingJpegQuality.}
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ImagingJNGQuality = 43;
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{ Specifies whether JNG images are saved in progressive format.
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For details look at ImagingJpegProgressive.}
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ImagingJNGProgressive = 44;
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{ Specifies whether PGM files are stored in text or in binary format.
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Allowed values are 0 (store as text - very! large files) and 1 (save binary).
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Default value is 1.}
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ImagingPGMSaveBinary = 50;
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{ Specifies whether PPM files are stored in text or in binary format.
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Allowed values are 0 (store as text - very! large files) and 1 (save binary).
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Default value is 1.}
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ImagingPPMSaveBinary = 51;
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{ Boolean option that specifies whether GIF images with more frames
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are animated by Imaging (according to frame disposal methods) or just
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raw frames are loaded and sent to user (if you want to animate GIF yourself).
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Default value is 1.
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Raw frames are 256 color indexed images (ifIndex8), whereas
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animated frames are always in 32bit ifA8R8G8B8 format (simplifies animating).}
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ImagingGIFLoadAnimated = 56;
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{ This option is used when reducing number of colors used in
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image (mainly when converting from ARGB image to indexed
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format). Mask is 'anded' (bitwise AND) with every pixel's
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channel value when creating color histogram. If $FF is used
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all 8bits of color channels are used which can result in very
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slow proccessing of large images with many colors so you can
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use lower masks to speed it up (FC, F8 and F0 are good
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choices). Allowed values are in range <0, $FF> and default is
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$FE. }
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ImagingColorReductionMask = 128;
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{ This option can be used to override image data format during image
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loading. If set to format different from ifUnknown all loaded images
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are automaticaly converted to this format. Useful when you have
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many files in various formats but you want them all in one format for
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further proccessing. Allowed values are in
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range <Ord(Low(TImageFormat)), Ord(High(TImageFormat))> and
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default value is ifUnknown.}
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ImagingLoadOverrideFormat = 129;
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{ This option can be used to override image data format during image
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saving. If set to format different from ifUnknown all images
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to be saved are automaticaly internaly converted to this format.
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Note that image file formats support only a subset of Imaging data formats
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so final saved file may in different format than this override.
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Allowed values are in range <Ord(Low(TImageFormat)), Ord(High(TImageFormat))>
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and default value is ifUnknown.}
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ImagingSaveOverrideFormat = 130;
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{ Specifies resampling filter used when generating mipmaps. It is used
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in GenerateMipMaps low level function and Direct3D and OpenGL extensions.
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Allowed values are in range
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<Ord(Low(ImagingFormats.TSamplingFilter)), Ord(High(ImagingFormats.TSamplingFilter))>
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and default value is 1 (linear filter).}
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ImagingMipMapFilter = 131;
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{ Returned by GetOption if given Option Id is invalid.}
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InvalidOption = -$7FFFFFFF;
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{ Indices that can be used to access channel values in array parts
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of structures like TColor32Rec. Note that this order can be
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used only for ARGB images. For ABGR image you must swap Red and Blue.}
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ChannelBlue = 0;
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ChannelGreen = 1;
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ChannelRed = 2;
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ChannelAlpha = 3;
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type
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{ Enum defining image data format. In formats with more channels,
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first channel after "if" is stored in the most significant bits and channel
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before end is stored in the least significant.}
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TImageFormat = (
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ifUnknown = 0,
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ifDefault = 1,
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{ Indexed formats using palette.}
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ifIndex8 = 10,
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{ Grayscale/Luminance formats.}
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ifGray8 = 40,
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ifA8Gray8 = 41,
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ifGray16 = 42,
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ifGray32 = 43,
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ifGray64 = 44,
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ifA16Gray16 = 45,
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{ ARGB formats.}
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ifX5R1G1B1 = 80,
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ifR3G3B2 = 81,
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ifR5G6B5 = 82,
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ifA1R5G5B5 = 83,
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ifA4R4G4B4 = 84,
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ifX1R5G5B5 = 85,
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ifX4R4G4B4 = 86,
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ifR8G8B8 = 87,
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ifA8R8G8B8 = 88,
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ifX8R8G8B8 = 89,
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ifR16G16B16 = 90,
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ifA16R16G16B16 = 91,
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ifB16G16R16 = 92,
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ifA16B16G16R16 = 93,
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{ Floating point formats.}
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ifR32F = 170,
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ifA32R32G32B32F = 171,
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ifA32B32G32R32F = 172,
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ifR16F = 173,
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ifA16R16G16B16F = 174,
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ifA16B16G16R16F = 175,
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{ Special formats.}
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ifDXT1 = 220,
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ifDXT3 = 221,
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ifDXT5 = 222,
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ifBTC = 223,
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ifATI1N = 224,
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ifATI2N = 225);
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{ Color value for 32 bit images.}
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TColor32 = LongWord;
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PColor32 = ^TColor32;
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{ Color value for 64 bit images.}
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TColor64 = type Int64;
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PColor64 = ^TColor64;
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{ Color record for 24 bit images, which allows access to individual color
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channels.}
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TColor24Rec = packed record
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case LongInt of
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0: (B, G, R: Byte);
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1: (Channels: array[0..2] of Byte);
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end;
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PColor24Rec = ^TColor24Rec;
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TColor24RecArray = array[0..MaxInt div SizeOf(TColor24Rec) - 1] of TColor24Rec;
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PColor24RecArray = ^TColor24RecArray;
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{ Color record for 32 bit images, which allows access to individual color
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channels.}
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TColor32Rec = packed record
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case LongInt of
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0: (Color: TColor32);
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1: (B, G, R, A: Byte);
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2: (Channels: array[0..3] of Byte);
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3: (Color24Rec: TColor24Rec);
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end;
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PColor32Rec = ^TColor32Rec;
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TColor32RecArray = array[0..MaxInt div SizeOf(TColor32Rec) - 1] of TColor32Rec;
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PColor32RecArray = ^TColor32RecArray;
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{ Color record for 48 bit images, which allows access to individual color
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channels.}
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TColor48Rec = packed record
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case LongInt of
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0: (B, G, R: Word);
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1: (Channels: array[0..2] of Word);
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end;
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PColor48Rec = ^TColor48Rec;
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TColor48RecArray = array[0..MaxInt div SizeOf(TColor48Rec) - 1] of TColor48Rec;
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PColor48RecArray = ^TColor48RecArray;
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{ Color record for 64 bit images, which allows access to individual color
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channels.}
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TColor64Rec = packed record
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case LongInt of
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0: (Color: TColor64);
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1: (B, G, R, A: Word);
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2: (Channels: array[0..3] of Word);
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3: (Color48Rec: TColor48Rec);
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end;
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PColor64Rec = ^TColor64Rec;
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TColor64RecArray = array[0..MaxInt div SizeOf(TColor64Rec) - 1] of TColor64Rec;
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PColor64RecArray = ^TColor64RecArray;
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{ Color record for 128 bit floating point images, which allows access to
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individual color channels.}
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TColorFPRec = packed record
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case LongInt of
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0: (B, G, R, A: Single);
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1: (Channels: array[0..3] of Single);
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end;
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PColorFPRec = ^TColorFPRec;
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TColorFPRecArray = array[0..MaxInt div SizeOf(TColorFPRec) - 1] of TColorFPRec;
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PColorFPRecArray = ^TColorFPRecArray;
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{ 16 bit floating-point value. It has 1 sign bit, 5 exponent bits,
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and 10 mantissa bits.}
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THalfFloat = type Word;
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PHalfFloat = ^THalfFloat;
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{ Color record for 64 bit floating point images, which allows access to
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individual color channels.}
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TColorHFRec = packed record
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case LongInt of
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0: (B, G, R, A: THalfFloat);
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1: (Channels: array[0..3] of THalfFloat);
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end;
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PColorHFRec = ^TColorHFRec;
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TColorHFRecArray = array[0..MaxInt div SizeOf(TColorHFRec) - 1] of TColorHFRec;
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PColorHFRecArray = ^TColorHFRecArray;
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{ Palette for indexed mode images with 32 bit colors.}
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TPalette32 = TColor32RecArray;
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TPalette32Size256 = array[0..255] of TColor32Rec;
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PPalette32 = ^TPalette32;
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{ Palette for indexd mode images with 24 bit colors.}
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TPalette24 = TColor24RecArray;
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TPalette24Size256 = array[0..255] of TColor24Rec;
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PPalette24 = ^TPalette24;
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{ Record that stores single image data and information describing it.}
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TImageData = packed record
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Width: LongInt; // Width of image in pixels
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Height: LongInt; // Height of image in pixels
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Format: TImageFormat; // Data format of image
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Size: LongInt; // Size of image bits in Bytes
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Bits: Pointer; // Pointer to memory containing image bits
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Palette: PPalette32; // Image palette for indexed images
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end;
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PImageData = ^TImageData;
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{ Pixel format information used in conversions to/from 16 and 8 bit ARGB
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image formats.}
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TPixelFormatInfo = packed record
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ABitCount, RBitCount, GBitCount, BBitCount: Byte;
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ABitMask, RBitMask, GBitMask, BBitMask: LongWord;
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AShift, RShift, GShift, BShift: Byte;
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ARecDiv, RRecDiv, GRecDiv, BRecDiv: Byte;
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end;
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PPixelFormatInfo = ^TPixelFormatInfo;
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PImageFormatInfo = ^TImageFormatInfo;
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{ Look at TImageFormatInfo.GetPixelsSize for details.}
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TFormatGetPixelsSizeFunc = function(Format: TImageFormat; Width,
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Height: LongInt): LongInt;
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{ Look at TImageFormatInfo.CheckDimensions for details.}
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TFormatCheckDimensionsProc = procedure(Format: TImageFormat; var Width,
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Height: LongInt);
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{ Function for getting pixel colors. Native pixel is read from Image and
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then translated to 32 bit ARGB.}
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TGetPixel32Func = function(Bits: Pointer; Info: PImageFormatInfo;
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Palette: PPalette32): TColor32Rec;
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{ Function for getting pixel colors. Native pixel is read from Image and
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then translated to FP ARGB.}
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TGetPixelFPFunc = function(Bits: Pointer; Info: PImageFormatInfo;
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Palette: PPalette32): TColorFPRec;
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{ Procedure for setting pixel colors. Input 32 bit ARGB color is translated to
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native format and then written to Image.}
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TSetPixel32Proc = procedure(Bits: Pointer; Info: PImageFormatInfo;
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Palette: PPalette32;const Color: TColor32Rec);
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{ Procedure for setting pixel colors. Input FP ARGB color is translated to
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native format and then written to Image.}
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TSetPixelFPProc = procedure(Bits: Pointer; Info: PImageFormatInfo;
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Palette: PPalette32; const Color: TColorFPRec);
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{ Additional information for each TImageFormat value.}
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TImageFormatInfo = packed record
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Format: TImageFormat; // Format described by this record
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Name: array[0..15] of Char; // Symbolic name of format
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BytesPerPixel: LongInt; // Number of bytes per pixel (note: it is
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// 0 for formats where BitsPerPixel < 8 (e.g. DXT).
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// Use GetPixelsSize function to get size of
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// image data.
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ChannelCount: LongInt; // Number of image channels (R, G, B, A, Gray)
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PaletteEntries: LongInt; // Number of palette entries
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HasGrayChannel: Boolean; // True if image has grayscale channel
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HasAlphaChannel: Boolean; // True if image has alpha channel
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IsFloatingPoint: Boolean; // True if image has floating point pixels
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UsePixelFormat: Boolean; // True if image uses pixel format
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IsRBSwapped: Boolean; // True if Red and Blue channels are swapped
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// e.g. A16B16G16R16 has IsRBSwapped True
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RBSwapFormat: TImageFormat; // Indicates supported format with swapped
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// Red and Blue channels, ifUnknown if such
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// format does not exist
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IsIndexed: Boolean; // True if image uses palette
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IsSpecial: Boolean; // True if image is in special format
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PixelFormat: PPixelFormatInfo; // Pixel format structure
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GetPixelsSize: TFormatGetPixelsSizeFunc; // Returns size in bytes of
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// Width * Height pixels of image
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CheckDimensions: TFormatCheckDimensionsProc; // some formats have limited
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// values of Width and Height. This
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// procedure checks and changes dimensions
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// to be valid for given format.
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GetPixel32: TGetPixel32Func; // 32bit ARGB pixel get function
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GetPixelFP: TGetPixelFPFunc; // FP ARGB pixel get function
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SetPixel32: TSetPixel32Proc; // 32bit ARGB pixel set procedure
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SetPixelFP: TSetPixelFPProc; // FP ARGB pixel set procedure
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SpecialNearestFormat: TImageFormat; // Regular image format used when
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// compressing/decompressing special images
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// as source/target
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end;
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{ Handle to list of image data records.}
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TImageDataList = Pointer;
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PImageDataList = ^TImageDataList;
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{ Handle to input/output.}
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TImagingHandle = Pointer;
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{ Filters used in functions that resize images or their portions.}
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TResizeFilter = (
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rfNearest = 0,
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rfBilinear = 1,
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rfBicubic = 2);
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{ Seek origin mode for IO function Seek.}
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TSeekMode = (
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smFromBeginning = 0,
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smFromCurrent = 1,
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smFromEnd = 2);
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{ IO functions used for reading and writing images from/to input/output.}
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TOpenReadProc = function(Source: PChar): TImagingHandle; cdecl;
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TOpenWriteProc = function(Source: PChar): TImagingHandle; cdecl;
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TCloseProc = procedure(Handle: TImagingHandle); cdecl;
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TEofProc = function(Handle: TImagingHandle): Boolean; cdecl;
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TSeekProc = function(Handle: TImagingHandle; Offset: LongInt; Mode: TSeekMode): LongInt; cdecl;
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TTellProc = function(Handle: TImagingHandle): LongInt; cdecl;
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|
TReadProc = function(Handle: TImagingHandle; Buffer: Pointer; Count: LongInt): LongInt; cdecl;
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|
TWriteProc = function(Handle: TImagingHandle; Buffer: Pointer; Count: LongInt): LongInt; cdecl;
|
|
|
|
implementation
|
|
|
|
{
|
|
File Notes:
|
|
|
|
-- TODOS ----------------------------------------------------
|
|
- add lookup tables to pixel formats for fast conversions
|
|
|
|
-- 0.24.3 Changes/Bug Fixes ---------------------------------
|
|
- Added ifATI1N and ifATI2N image data formats.
|
|
|
|
-- 0.23 Changes/Bug Fixes -----------------------------------
|
|
- Added ifBTC image format and SpecialNearestFormat field
|
|
to TImageFormatInfo.
|
|
|
|
-- 0.21 Changes/Bug Fixes -----------------------------------
|
|
- Added option constants for PGM and PPM file formats.
|
|
- Added TPalette32Size256 and TPalette24Size256 types.
|
|
|
|
-- 0.19 Changes/Bug Fixes -----------------------------------
|
|
- added ImagingVersionPatch constant so bug fix only releases
|
|
can be distinguished from ordinary major/minor releases
|
|
- renamed TPixelFormat to TPixelFormatInfo to avoid name collisions
|
|
with Graphics.TPixelFormat
|
|
- added new image data formats: ifR16F, ifA16R16G16B16F,
|
|
ifA16B16G16R16F
|
|
- added pixel get/set function pointers to TImageFormatInfo
|
|
- added 16bit half float type and color record
|
|
- renamed TColorFRec to TColorFPRec (and related types too)
|
|
|
|
-- 0.17 Changes/Bug Fixes -----------------------------------
|
|
- added option ImagingMipMapFilter which now controls resampling filter
|
|
used when generating mipmaps
|
|
- added TResizeFilter type
|
|
- added ChannelCount to TImageFormatInfo
|
|
- added new option constants for MNG and JNG images
|
|
|
|
-- 0.15 Changes/Bug Fixes -----------------------------------
|
|
- added RBSwapFormat to TImageFormatInfo for faster conversions
|
|
between swapped formats (it just calls SwapChannels now if
|
|
RBSwapFormat is not ifUnknown)
|
|
- moved TImageFormatInfo and required types from Imaging unit
|
|
here, removed TImageFormatShortInfo
|
|
- added new options: ImagingLoadOverrideFormat, ImagingSaveOverrideFormat
|
|
|
|
-- 0.13 Changes/Bug Fixes -----------------------------------
|
|
- new ImagingColorReductionMask option added
|
|
- new image format added: ifA16Gray16
|
|
|
|
}
|
|
|
|
end.
|