Add TextField.lineSpaceScale

Author: Hugh Sanderson

project/include/TextField.h

@@ -36,6 +36,7 @@ class TextField : public DisplayObject
    float       sharpness;
    int         textColor;
    float       thickness;
+   float       lineSpaceScale;
    bool        useRichTextClipboard;
    bool        wordWrap;
    bool        isInput;
@@ -122,6 +123,8 @@ class TextField : public DisplayObject
    void modifyLocalMatrix(Matrix &ioMatrix);
    void setAntiAliasType(int inVal);
    int getAntiAliasType() const { return (int)antiAliasType; }
+   void setLineSpaceScale(double inVal);
+   inline float getLineSpaceScale() const { return lineSpaceScale; }
 
 
    int   getCaretIndex() { return caretIndex; }

project/src/common/ExternalInterface.cpp

@@ -4137,6 +4137,7 @@ TEXT_PROP_PRIME(embed_fonts,EmbedFonts,bool);
 TEXT_PROP_PRIME(auto_size,AutoSize,int);
 TEXT_PROP_PRIME(caret_index,CaretIndex,int);
 TEXT_PROP_PRIME(anti_alias_type,AntiAliasType,int);
+TEXT_PROP_PRIME(line_space_scale,LineSpaceScale,double);
 TEXT_PROP_GET_PRIME(text_width,TextWidth,double);
 TEXT_PROP_GET_PRIME(text_height,TextHeight,double);
 TEXT_PROP_GET_PRIME(max_scroll_h,MaxScrollH,int);

project/src/common/FreeType.cpp

@@ -288,7 +288,7 @@ class FreeTypeFont : public FontFace
          if (!sGammaLUTInit)
          {
             for(int i=0;i<256;i++)
-               sGammaLUT[i] = pow(i/255.0,1.25)*255 + 0.5;
+               sGammaLUT[i] = pow(i/255.0,1.6)*255 + 0.5;
             sGammaLUTInit = true;
          }
          lut = sGammaLUT;

project/src/common/TextField.cpp

@@ -45,6 +45,7 @@ TextField::TextField(bool inInitRef) : DisplayObject(inInitRef),
    sharpness(0),
    textColor(0x000000),
    thickness(0),
+   lineSpaceScale(1.0f),
    useRichTextClipboard(false),
    wordWrap(false),
    isInput(false)
@@ -301,6 +302,16 @@ void TextField::setAntiAliasType(int inVal)
 }
 
 
+void TextField::setLineSpaceScale(double inScale)
+{
+   if (lineSpaceScale!=inScale)
+   {
+      lineSpaceScale = (float)inScale;
+      Layout();
+   }
+}
+
+
 void TextField::setTextColor(int inCol)
 {
    textColor = inCol;
@@ -2233,9 +2244,10 @@ void TextField::Layout(const Matrix &inMatrix, const RenderTarget *inTarget)
             if (ch=='\n' || ch=='\r')
             {
                // New line ...
-               line.mMetrics.fontToLocal(fontToLocal);
+               line.mMetrics.fontToLocal(fontToLocal*lineSpaceScale);
                if (i+1<mCharGroups.size() || cid+1<g.Chars())
                   line.mMetrics.height += g.mFormat->leading;
+
                charY += line.mMetrics.height;
                mLines.push_back(line);
                line.Clear();
@@ -2281,7 +2293,7 @@ void TextField::Layout(const Matrix &inMatrix, const RenderTarget *inTarget)
                line.mChars = last_word_line_chars;
                line.mMetrics.width = last_word_x;
             }
-            line.mMetrics.fontToLocal(fontToLocal);
+            line.mMetrics.fontToLocal(fontToLocal*lineSpaceScale);
             if (i+1<mCharGroups.size() || cid+1<g.Chars())
                line.mMetrics.height += g.mFormat->leading;
             charY += line.mMetrics.height;
@@ -2302,7 +2314,7 @@ void TextField::Layout(const Matrix &inMatrix, const RenderTarget *inTarget)
    {
       CharGroup *last=mCharGroups[mCharGroups.size()-1];
       last->UpdateMetrics(line.mMetrics);
-      line.mMetrics.fontToLocal(fontToLocal);
+      line.mMetrics.fontToLocal(fontToLocal*lineSpaceScale);
       if (endsWidthNewLine)
       {
          line.mY0 = charY;
@@ -2430,6 +2442,7 @@ void TextField::decodeStream(ObjectStreamIn &stream)
    stream.get(sharpness);
    stream.get(textColor);
    stream.get(thickness);
+   stream.get(lineSpaceScale);
    stream.get(useRichTextClipboard);
    stream.get(wordWrap);
    stream.get(isInput);
@@ -2489,6 +2502,7 @@ void TextField::encodeStream(ObjectStreamOut &stream)
    stream.add(sharpness);
    stream.add(textColor);
    stream.add(thickness);
+   stream.add(lineSpaceScale);
    stream.add(useRichTextClipboard);
    stream.add(wordWrap);
    stream.add(isInput);

project/src/windows/GDIFont.cpp

@@ -63,7 +63,7 @@ class GDIFont : public FontFace
       if (!sGammaLUTInit)
       {
          for(int i=0;i<256;i++)
-            sGammaLUT[i] = pow(i/255.0,1.25)*255 + 0.5;
+            sGammaLUT[i] = pow(i/255.0,1.6)*255 + 0.5;
 
          sGammaLUTInit = true;
       }
@@ -119,7 +119,7 @@ class GDIFont : public FontFace
             uint8  *dest = (uint8 *)outTarget.Row(y + outTarget.mRect.y) + outTarget.mRect.x;
             for(int x=0;x<outTarget.mRect.w;x++)
             {
-               *dest++= sGammaLUT[ (src->r + src->g*2 + src->b + 2) / 4];
+               *dest++= sGammaLUT[ (src->r + src->g + src->b + 1) / 3];
                src++;
             }
          }

src/nme/text/TextField.hx

@@ -29,6 +29,7 @@ class TextField extends InteractiveObject
    public var selectionEndIndex(get, null):Int;
    public var multiline(get, set):Bool;
    public var numLines(get, null):Int;
+   public var lineSpaceScale(get, set):Float;
    public var scrollH(get, set):Int;
    public var scrollV(get, set):Int;
    public var selectable(get, set):Bool;
@@ -184,6 +185,8 @@ class TextField extends InteractiveObject
    private function set_text(inText:String):String { nme_text_field_set_text(nmeHandle, inText); return inText; }
    private function get_textColor():Int { return nme_text_field_get_text_color(nmeHandle); }
    private function set_textColor(inCol:Int):Int { nme_text_field_set_text_color(nmeHandle, inCol); return inCol; }
+   private function get_lineSpaceScale():Float { return nme_text_field_get_line_space_scale(nmeHandle); }
+   private function set_lineSpaceScale(inValue:Float):Float { nme_text_field_set_line_space_scale(nmeHandle, inValue); return inValue; }
    private function get_textWidth():Float { return nme_text_field_get_text_width(nmeHandle); }
    private function get_textHeight():Float { return nme_text_field_get_text_height(nmeHandle); }
    private function get_type():TextFieldType { return nme_text_field_get_type(nmeHandle) ? TextFieldType.INPUT : TextFieldType.DYNAMIC; }
@@ -270,6 +273,8 @@ class TextField extends InteractiveObject
    private static var nme_text_field_send_key = PrimeLoader.load("nme_text_field_send_key", "oiiiv");
    private static var nme_text_field_set_anti_alias_type = PrimeLoader.load("nme_text_field_set_anti_alias_type", "oiv");
    private static var nme_text_field_get_anti_alias_type = PrimeLoader.load("nme_text_field_get_anti_alias_type", "oi");
+   private static var nme_text_field_set_line_space_scale = PrimeLoader.load("nme_text_field_set_line_space_scale", "odv");
+   private static var nme_text_field_get_line_space_scale = PrimeLoader.load("nme_text_field_get_line_space_scale", "od");
 }
 
 #else