babl (empty) → 0.0.0.1
raw patch · 7 files changed
+441/−0 lines, 7 filesdep +basesetup-changed
Dependencies added: base
Files
- LICENSE +165/−0
- Setup.hs +2/−0
- babl.cabal +31/−0
- src/BABL.hs +17/−0
- src/BABL/FFI.hs +15/−0
- src/BABL/FFI/Format.hs +129/−0
- src/BABL/Format.hs +82/−0
+ LICENSE view
@@ -0,0 +1,165 @@+ GNU LESSER GENERAL PUBLIC LICENSE+ Version 3, 29 June 2007++ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>+ Everyone is permitted to copy and distribute verbatim copies+ of this license document, but changing it is not allowed.+++ This version of the GNU Lesser General Public License incorporates+the terms and conditions of version 3 of the GNU General Public+License, supplemented by the additional permissions listed below.++ 0. Additional Definitions.++ As used herein, "this License" refers to version 3 of the GNU Lesser+General Public License, and the "GNU GPL" refers to version 3 of the GNU+General Public License.++ "The Library" refers to a covered work governed by this License,+other than an Application or a Combined Work as defined below.++ An "Application" is any work that makes use of an interface provided+by the Library, but which is not otherwise based on the Library.+Defining a subclass of a class defined by the Library is deemed a mode+of using an interface provided by the Library.++ A "Combined Work" is a work produced by combining or linking an+Application with the Library. The particular version of the Library+with which the Combined Work was made is also called the "Linked+Version".++ The "Minimal Corresponding Source" for a Combined Work means the+Corresponding Source for the Combined Work, excluding any source code+for portions of the Combined Work that, considered in isolation, are+based on the Application, and not on the Linked Version.++ The "Corresponding Application Code" for a Combined Work means the+object code and/or source code for the Application, including any data+and utility programs needed for reproducing the Combined Work from the+Application, but excluding the System Libraries of the Combined Work.++ 1. Exception to Section 3 of the GNU GPL.++ You may convey a covered work under sections 3 and 4 of this License+without being bound by section 3 of the GNU GPL.++ 2. Conveying Modified Versions.++ If you modify a copy of the Library, and, in your modifications, a+facility refers to a function or data to be supplied by an Application+that uses the facility (other than as an argument passed when the+facility is invoked), then you may convey a copy of the modified+version:++ a) under this License, provided that you make a good faith effort to+ ensure that, in the event an Application does not supply the+ function or data, the facility still operates, and performs+ whatever part of its purpose remains meaningful, or++ b) under the GNU GPL, with none of the additional permissions of+ this License applicable to that copy.++ 3. Object Code Incorporating Material from Library Header Files.++ The object code form of an Application may incorporate material from+a header file that is part of the Library. You may convey such object+code under terms of your choice, provided that, if the incorporated+material is not limited to numerical parameters, data structure+layouts and accessors, or small macros, inline functions and templates+(ten or fewer lines in length), you do both of the following:++ a) Give prominent notice with each copy of the object code that the+ Library is used in it and that the Library and its use are+ covered by this License.++ b) Accompany the object code with a copy of the GNU GPL and this license+ document.++ 4. 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Combined Libraries.++ You may place library facilities that are a work based on the+Library side by side in a single library together with other library+facilities that are not Applications and are not covered by this+License, and convey such a combined library under terms of your+choice, if you do both of the following:++ a) Accompany the combined library with a copy of the same work based+ on the Library, uncombined with any other library facilities,+ conveyed under the terms of this License.++ b) Give prominent notice with the combined library that part of it+ is a work based on the Library, and explaining where to find the+ accompanying uncombined form of the same work.++ 6. Revised Versions of the GNU Lesser General Public License.++ The Free Software Foundation may publish revised and/or new versions+of the GNU Lesser General Public License from time to time. Such new+versions will be similar in spirit to the present version, but may+differ in detail to address new problems or concerns.++ Each version is given a distinguishing version number. If the+Library as you received it specifies that a certain numbered version+of the GNU Lesser General Public License "or any later version"+applies to it, you have the option of following the terms and+conditions either of that published version or of any later version+published by the Free Software Foundation. If the Library as you+received it does not specify a version number of the GNU Lesser+General Public License, you may choose any version of the GNU Lesser+General Public License ever published by the Free Software Foundation.++ If the Library as you received it specifies that a proxy can decide+whether future versions of the GNU Lesser General Public License shall+apply, that proxy's public statement of acceptance of any version is+permanent authorization for you to choose that version for the+Library.
+ Setup.hs view
@@ -0,0 +1,2 @@+import Distribution.Simple+main = defaultMain
+ babl.cabal view
@@ -0,0 +1,31 @@+name: babl+version: 0.0.0.1+synopsis: Initial project template from stack+description: Please see README.md+homepage: http://github.com/nek0/babl#readme+license: LGPL-3+license-file: LICENSE+author: nek0+maintainer: nek0@nek0.eu+-- copyright:+category: Graphics+build-type: Simple+-- extra-source-files:+cabal-version: >=1.10++library+ exposed-modules: BABL+ , BABL.Format+ , BABL.FFI+ , BABL.FFI.Format+ hs-source-dirs: src+ default-language: Haskell2010+ other-extensions: ForeignFunctionInterface+ extra-libraries: babl-0.1+ includes: babl/babl.h+ pkgconfig-depends: babl >= 0.1.16+ build-depends: base >= 4.7 && < 5++source-repository head+ type: git+ location: https://github.com/nek0/babl
+ src/BABL.hs view
@@ -0,0 +1,17 @@+module BABL+ ( babl_init+ , babl_exit+ , module BABL.Format+ ) where++import BABL.Format++import qualified BABL.FFI as FFI++-- | Initialize the BABL environment.+-- This function must be called before performing any conversions+babl_init :: IO ()+babl_init = FFI.c_babl_init++-- | Exit and clean up after BABL has been used+babl_exit = FFI.c_babl_exit
+ src/BABL/FFI.hs view
@@ -0,0 +1,15 @@+-- | FFI module for basic functions+module BABL.FFI+ ( c_babl_init+ , c_babl_exit+ ) where++import Foreign++-- | Interface to the @babl_init@ function in C+foreign import ccall unsafe "babl.h babl_init"+ c_babl_init :: IO ()++-- | Interface to the @babl_exit@ function in C+foreign import ccall unsafe "babl.h babl_exit"+ c_babl_exit :: IO ()
+ src/BABL/FFI/Format.hs view
@@ -0,0 +1,129 @@+-- FFI module for handling pixel formats+module BABL.FFI.Format+ ( BablFormatPtr(..)+ , BablFormatDummy+ , ComponentModel(..)+ , ComponentFormat(..)+ , PixelFormat(..)+ , c_babl_format+ , c_babl_get_bpp+ , c_babl_format_get_n_components+ ) where++import Foreign+import Foreign.C.Types (CInt(..))+import Foreign.C.String+import Foreign.Ptr (Ptr)++-- | The dummy Pointer behind 'BablFormatPtr'. Do not 'peek' or 'poke'+type BablFormatDummy = Ptr ()+data BablFormatPtr = BablFormatPtr+ { unwrap :: BablFormatDummy }++-- | List of component models af babl formats.+data ComponentModel+ = RGB+ | RGBA+ | RaGaBaA+ | R'G'B'+ | R'G'B'A+ | R'aG'aB'aA+ | Y+ | YA+ | YaA+ | Y'+ | Y'A+ | Y'aA+ | Y'CbCr+ | Y'CbCrA+ | HSVA+ | HSV+ | CMYK+ | CMY+ | CIELab+ | CIELabAlpha+ | CIELCHab+ | CIELCHabAlpha+ | HSLA+ | HSL+ | Y'CbCr709+ | Y'CbCrA709+ | Cairo++instance Show ComponentModel where+ show RGB = "RGB"+ show RGBA = "RGBA"+ show RaGaBaA = "RaGaBaA"+ show R'G'B' = "R'G'B'"+ show R'G'B'A = "R'G'B'A"+ show R'aG'aB'aA = "R'aG'aB'aA"+ show Y = "Y"+ show YA = "YA"+ show YaA = "YaA"+ show Y' = "Y'"+ show Y'A = "Y'A"+ show Y'aA = "Y'aA"+ show Y'CbCr = "Y'CbCr"+ show Y'CbCrA = "Y'CbCrA"+ show HSVA = "HSVA"+ show HSV = "HSV"+ show CMYK = "CMYK"+ show CMY = "CMY"+ show CIELab = "CIE Lab"+ show CIELabAlpha = "CIE Lab alpha"+ show CIELCHab = "CIE LCH(ab)"+ show CIELCHabAlpha = "CIE LCH(ab) alpha"+ show HSLA = "HSLA"+ show HSL = "HSL"+ show Y'CbCr709 = "Y'CbCr709"+ show Y'CbCrA709 = "Y'CbCrA709"+ show Cairo = error "no show for Cairo model"++-- | Byte format of a colour component.+data ComponentFormat+ = CFhalf+ | CFfloat+ | CFdouble+ | CFu8+ | CFu15+ | CFu16+ | CFu32+ | A8+ | RGB24+ | ARGB32++instance Show ComponentFormat where+ show CFhalf = "half"+ show CFfloat = "float"+ show CFdouble = "double"+ show CFu8 = "u8"+ show CFu15 = "u15"+ show CFu16 = "u16"+ show CFu32 = "u32"+ show _ = error "no show here"++data PixelFormat+ = PixelFormat+ { pfComponents :: ComponentModel+ , pfType :: ComponentFormat+ }++-- | create a new predefined BABL format+foreign import ccall unsafe "babl.h babl_format"+ c_babl_format+ :: CString -- ^ Format name+ -> IO BablFormatDummy++-- | create and define your own BABL format+-- foreign import ccall unsafe "babl.h babl_format_new"++-- | Get the number of bytes per pixel from a format.+foreign import ccall unsafe "babl.h babl_format_get_bytes_per_pixel"+ c_babl_get_bpp+ :: BablFormatDummy -- ^ Format to be drawn from+ -> IO CInt++foreign import ccall unsafe "babl.h babl_format_get_n_components"+ c_babl_format_get_n_components+ :: BablFormatDummy+ -> IO CInt
+ src/BABL/Format.hs view
@@ -0,0 +1,82 @@+{-# LANGUAGE RecordWildCards #-}++-- | This module contains the pixel formats supprted my babl+module BABL.Format+ ( FFI.PixelFormat(..)+ , FFI.ComponentModel(..)+ , FFI.ComponentFormat(..)+ , FFI.BablFormatPtr+ , babl_format+ , babl_get_bpp+ , babl_format_by_str+ , babl_components_per_pixel+ ) where++import qualified BABL.FFI.Format as FFI++import Foreign.C.String (withCString)+import Foreign.C.Types (CInt(..))++babl_components_per_pixel :: FFI.PixelFormat -> Int+babl_components_per_pixel FFI.PixelFormat{..} =+ case pfComponents of+ FFI.RGB -> 3+ FFI.RGBA -> 4+ FFI.RaGaBaA -> 4+ FFI.R'G'B' -> 3+ FFI.R'G'B'A -> 4+ FFI.R'aG'aB'aA -> 4+ FFI.Y -> 1+ FFI.YA -> 2+ FFI.YaA -> 2+ FFI.Y' -> 1+ FFI.Y'A -> 2+ FFI.Y'aA -> 2+ FFI.Y'CbCr -> 3+ FFI.Y'CbCrA -> 4+ FFI.HSVA -> 4+ FFI.HSV -> 3+ FFI.CMYK -> 4+ FFI.CMY -> 3+ FFI.CIELab -> 3+ FFI.CIELabAlpha -> 4+ FFI.CIELCHab -> 3+ FFI.CIELCHabAlpha -> 4+ FFI.HSLA -> 4+ FFI.HSL -> 3+ FFI.Y'CbCr709 -> 3+ FFI.Y'CbCrA709 -> 4+ FFI.Cairo -> case pfType of+ FFI.A8 -> 1+ FFI.RGB24 -> 4+ FFI.ARGB32 -> 4+ _ -> error "wrong type"++-- | Create a 'BablFormatPtr' to pass around to other functions.+babl_format+ :: FFI.PixelFormat -- ^ Format to be used+ -> IO FFI.BablFormatPtr -- ^ Pointer to specified format+babl_format (FFI.PixelFormat FFI.Cairo pfType) =+ case pfType of+ FFI.A8 -> babl_format_by_str "cairo-A8"+ FFI.RGB24 -> babl_format_by_str "cairo-RGB24"+ FFI.ARGB32 -> babl_format_by_str "cairo-ARGB32"+ _ -> error "not a cairo format"+babl_format FFI.PixelFormat{..} =+ babl_format_by_str (show pfComponents ++ " " ++ show pfType)++-- | Build 'BablFormatPtr' by input String+babl_format_by_str+ :: String -- ^ Input string+ -> IO FFI.BablFormatPtr+babl_format_by_str s =+ return . FFI.BablFormatPtr =<< withCString s FFI.c_babl_format++-- | Peek the number of bytes per pixel from a format.+babl_get_bpp+ :: FFI.PixelFormat -- ^ Format to peek from+ -> IO Int+babl_get_bpp form = do+ (FFI.BablFormatPtr ptr) <- babl_format form+ (CInt res) <- FFI.c_babl_get_bpp ptr+ return $ fromIntegral res