io.encodings.utf16: add a utf16n word for native utf16 type.

[factor.git] / basis / windows / uniscribe / uniscribe.factor

diff --git a/basis/windows/uniscribe/uniscribe.factor b/basis/windows/uniscribe/uniscribe.factor
index 5e7635a199cd94f39f370ed5ccbd1decfa7f48d2..068e443a13b061f81a038b8260ef83149f9f96ab 100644 (file)
--- a/basis/windows/uniscribe/uniscribe.factor
+++ b/basis/windows/uniscribe/uniscribe.factor
@@ -1,40 +1,54 @@
 ! Copyright (C) 2009 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: accessors alien.c-types alien.data arrays assocs cache
-classes.struct colors colors.constants combinators destructors
-fonts images init io.encodings.string io.encodings.utf16n kernel
-literals locals math namespaces sequences windows.errors
+USING: accessors alien.c-types alien.data arrays assocs
+byte-arrays cache classes.struct colors colors.constants
+combinators destructors fonts images init io.encodings.string
+io.encodings.utf16 kernel literals locals math math.bitwise
+namespaces sequences specialized-arrays windows.errors
 windows.fonts windows.gdi32 windows.offscreen windows.ole32
 windows.types windows.usp10 ;
+SPECIALIZED-ARRAY: uint32_t
 IN: windows.uniscribe
 
 TUPLE: script-string < disposable font string metrics ssa size image ;
 
-: line-offset>x ( n script-string -- x )
-    2dup string>> length = [
-        ssa>> ! ssa
-        swap 1 - ! icp
+<PRIVATE
+
+CONSTANT: ssa-dwFlags flags{ SSA_GLYPHS SSA_FALLBACK SSA_TAB }
+
+:: >codepoint-index ( str utf16-index -- codepoint-index )
+    0 utf16-index 2 * str utf16n encode subseq utf16n decode length ;
+
+:: >utf16-index ( str codepoint-index -- utf16-index )
+    0 codepoint-index str subseq utf16n encode length 2 / >integer ;
+
+PRIVATE>
+
+:: line-offset>x ( n script-string -- x )
+    script-string string>> n >utf16-index :> n-utf16
+    script-string ssa>> ! ssa
+    n script-string string>> length = [
+        n-utf16 1 - ! icp
         TRUE ! fTrailing
     ] [
-        ssa>>
-        swap ! icp
+        n-utf16 ! icp
         FALSE ! fTrailing
     ] if
     { int } [ ScriptStringCPtoX check-ole32-error ] with-out-parameters ;
 
-: x>line-offset ( x script-string -- n trailing )
-    ssa>> ! ssa
-    swap ! iX
-    { int int } [ ScriptStringXtoCP check-ole32-error ] with-out-parameters ;
+:: x>line-offset ( x script-string -- n trailing )
+    script-string ssa>> ! ssa
+    x ! iX
+    { int int } [ ScriptStringXtoCP check-ole32-error ] with-out-parameters
+    swap dup 0 < [ script-string string>> swap >codepoint-index ] unless
+    swap ;
 
 <PRIVATE
 
-CONSTANT: ssa-dwFlags flags{ SSA_GLYPHS SSA_FALLBACK SSA_TAB }
-
 : make-ssa ( dc script-string -- ssa )
     dup selection? [ string>> ] when
-    [ utf16n encode ] ! pString
-    [ length ] bi ! cString
+    utf16n encode ! pString
+    dup length 2 / >integer ! cString
     dup 1.5 * 16 + >integer ! cGlyphs -- MSDN says this is "recommended size"
     -1 ! iCharset -- Unicode
     ssa-dwFlags
@@ -71,7 +85,14 @@ CONSTANT: ssa-dwFlags flags{ SSA_GLYPHS SSA_FALLBACK SSA_TAB }
         ETO_OPAQUE ! uOptions
     ]
     [ [ { 0 0 } ] dip <RECT> ]
-    [ selection-start/end ] tri*
+    [
+        [let :> str str selection-start/end
+         [
+             str string>> dup selection? [ string>> ] when
+             swap >utf16-index
+         ] bi@
+        ]
+    ] tri*
     ! iMinSel
     ! iMaxSel
     FALSE ! fDisabled
@@ -83,9 +104,14 @@ CONSTANT: ssa-dwFlags flags{ SSA_GLYPHS SSA_FALLBACK SSA_TAB }
 ! the entire image a rectangle of the given color with varying
 ! transparency.
 :: color-to-alpha ( image color -- image' )
-    image color >rgba-components drop [ 255 * >integer ] tri@ 3array [
-        swap first suffix -rot image set-pixel-at
-    ] curry each-pixel image RGBA >>component-order ;
+    color >rgba-components :> alpha
+    [ 255 * >integer ] tri@ 3byte-array uint32_t deref 24 bits :> rgb
+    image bitmap>> uint32_t cast-array
+        alpha 1 <
+        [ [ 0xff bitand alpha * >integer 24 shift rgb bitor ] map! ]
+        [ [ 0xff bitand                  24 shift rgb bitor ] map! ]
+        if drop
+    image RGBA >>component-order ;
 
 :: render-image ( dc ssa script-string -- image )
     script-string size>> :> size
@@ -143,5 +169,5 @@ SYMBOL: cached-script-strings
         ] with-memory-dc
     ] unless image>> ;
 
-[ <cache-assoc> &dispose cached-script-strings set-global ]
+[ <cache-assoc> cached-script-strings set-global ]
 "windows.uniscribe" add-startup-hook