--- /dev/null
+// Created on: 2013-01-28
+// Created by: Kirill GAVRILOV
+// Copyright (c) 2013 OPEN CASCADE SAS
+//
+// The content of this file is subject to the Open CASCADE Technology Public
+// License Version 6.5 (the "License"). You may not use the content of this file
+// except in compliance with the License. Please obtain a copy of the License
+// at http://www.opencascade.org and read it completely before using this file.
+//
+// The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
+// main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
+//
+// The Original Code and all software distributed under the License is
+// distributed on an "AS IS" basis, without warranty of any kind, and the
+// Initial Developer hereby disclaims all such warranties, including without
+// limitation, any warranties of merchantability, fitness for a particular
+// purpose or non-infringement. Please see the License for the specific terms
+// and conditions governing the rights and limitations under the License.
+
+#include <Font_FTFont.hxx>
+
+IMPLEMENT_STANDARD_HANDLE (Font_FTFont, Standard_Transient)
+IMPLEMENT_STANDARD_RTTIEXT(Font_FTFont, Standard_Transient)
+
+// =======================================================================
+// function : Font_FTFont
+// purpose :
+// =======================================================================
+Font_FTFont::Font_FTFont (const Handle(Font_FTLibrary)& theFTLib)
+: myFTLib (theFTLib),
+ myFTFace (NULL),
+ myPointSize (0),
+ myUChar (0)
+{
+ if (myFTLib.IsNull())
+ {
+ myFTLib = new Font_FTLibrary();
+ }
+}
+
+// =======================================================================
+// function : Font_FTFont
+// purpose :
+// =======================================================================
+Font_FTFont::~Font_FTFont()
+{
+ Release();
+}
+
+// =======================================================================
+// function : Font_FTFont
+// purpose :
+// =======================================================================
+void Font_FTFont::Release()
+{
+ myGlyphImg.Clear();
+ myFontPath.Clear();
+ myUChar = 0;
+ if (myFTFace != NULL)
+ {
+ FT_Done_Face (myFTFace);
+ myFTFace = NULL;
+ }
+}
+
+// =======================================================================
+// function : Font_FTFont
+// purpose :
+// =======================================================================
+bool Font_FTFont::Init (const NCollection_String& theFontPath,
+ const unsigned int thePointSize,
+ const unsigned int theResolution)
+{
+ Release();
+ myFontPath = theFontPath;
+ myPointSize = thePointSize;
+ if (!myFTLib->IsValid())
+ {
+ std::cerr << "FreeType library is unavailable!\n";
+ Release();
+ return false;
+ }
+
+ if (FT_New_Face (myFTLib->Instance(), myFontPath.ToCString(), 0, &myFTFace) != 0)
+ {
+ //std::cerr << "Font '" << myFontPath << "' fail to load!\n";
+ Release();
+ return false;
+ }
+ else if (FT_Select_Charmap (myFTFace, ft_encoding_unicode) != 0)
+ {
+ //std::cerr << "Font '" << myFontPath << "' doesn't contains Unicode charmap!\n";
+ Release();
+ return false;
+ }
+ else if (FT_Set_Char_Size (myFTFace, 0L, toFTPoints (thePointSize), theResolution, theResolution) != 0)
+ {
+ //std::cerr << "Font '" << myFontPath << "' doesn't contains Unicode charmap!\n";
+ Release();
+ return false;
+ }
+ return true;
+}
+
+// =======================================================================
+// function : loadGlyph
+// purpose :
+// =======================================================================
+bool Font_FTFont::loadGlyph (const Standard_Utf32Char theUChar)
+{
+ if (myUChar == theUChar)
+ {
+ return true;
+ }
+
+ myGlyphImg.Clear();
+ myUChar = 0;
+ if (theUChar == 0
+ || FT_Load_Char (myFTFace, theUChar, FT_LOAD_TARGET_NORMAL) != 0
+ || myFTFace->glyph == NULL)
+ {
+ return false;
+ }
+
+ myUChar = theUChar;
+ return true;
+}
+
+// =======================================================================
+// function : RenderGlyph
+// purpose :
+// =======================================================================
+bool Font_FTFont::RenderGlyph (const Standard_Utf32Char theUChar)
+{
+ myGlyphImg.Clear();
+ myUChar = 0;
+ if (theUChar == 0
+ || FT_Load_Char (myFTFace, theUChar, FT_LOAD_RENDER | FT_LOAD_NO_HINTING | FT_LOAD_TARGET_NORMAL) != 0
+ || myFTFace->glyph == NULL
+ || myFTFace->glyph->format != FT_GLYPH_FORMAT_BITMAP)
+ {
+ return false;
+ }
+
+ FT_Bitmap aBitmap = myFTFace->glyph->bitmap;
+ if (aBitmap.pixel_mode != FT_PIXEL_MODE_GRAY
+ || aBitmap.buffer == NULL || aBitmap.width <= 0 || aBitmap.rows <= 0)
+ {
+ return false;
+ }
+ if (!myGlyphImg.InitWrapper (Image_PixMap::ImgGray, aBitmap.buffer,
+ aBitmap.width, aBitmap.rows, Abs (aBitmap.pitch)))
+ {
+ return false;
+ }
+ myGlyphImg.SetTopDown (aBitmap.pitch > 0);
+ myUChar = theUChar;
+ return true;
+}
+
+// =======================================================================
+// function : GlyphMaxSizeX
+// purpose :
+// =======================================================================
+unsigned int Font_FTFont::GlyphMaxSizeX() const
+{
+ float aWidth = (FT_IS_SCALABLE(myFTFace) != 0)
+ ? float(myFTFace->bbox.xMax - myFTFace->bbox.xMin) * (float(myFTFace->size->metrics.x_ppem) / float(myFTFace->units_per_EM))
+ : fromFTPoints<float> (myFTFace->size->metrics.max_advance);
+ return (unsigned int)(aWidth + 0.5f);
+}
+
+// =======================================================================
+// function : GlyphMaxSizeY
+// purpose :
+// =======================================================================
+unsigned int Font_FTFont::GlyphMaxSizeY() const
+{
+ float aHeight = (FT_IS_SCALABLE(myFTFace) != 0)
+ ? float(myFTFace->bbox.yMax - myFTFace->bbox.yMin) * (float(myFTFace->size->metrics.y_ppem) / float(myFTFace->units_per_EM))
+ : fromFTPoints<float> (myFTFace->size->metrics.height);
+ return (unsigned int)(aHeight + 0.5f);
+}
+
+// =======================================================================
+// function : AdvanceX
+// purpose :
+// =======================================================================
+float Font_FTFont::AdvanceX (const Standard_Utf32Char theUChar,
+ const Standard_Utf32Char theUCharNext)
+{
+ loadGlyph (theUChar);
+ return AdvanceX (theUCharNext);
+}
+
+// =======================================================================
+// function : AdvanceY
+// purpose :
+// =======================================================================
+float Font_FTFont::AdvanceY (const Standard_Utf32Char theUChar,
+ const Standard_Utf32Char theUCharNext)
+{
+ loadGlyph (theUChar);
+ return AdvanceY (theUCharNext);
+}
+
+// =======================================================================
+// function : AdvanceX
+// purpose :
+// =======================================================================
+float Font_FTFont::AdvanceX (const Standard_Utf32Char theUCharNext)
+{
+ if (myUChar == 0)
+ {
+ return 0.0f;
+ }
+
+ if (FT_HAS_KERNING (myFTFace) == 0 || theUCharNext == 0
+ || FT_Get_Kerning (myFTFace, myUChar, theUCharNext, FT_KERNING_UNFITTED, &myKernAdvance) != 0)
+ {
+ return fromFTPoints<float> (myFTFace->glyph->advance.x);
+ }
+ return fromFTPoints<float> (myKernAdvance.x + myFTFace->glyph->advance.x);
+}
+
+// =======================================================================
+// function : AdvanceY
+// purpose :
+// =======================================================================
+float Font_FTFont::AdvanceY (const Standard_Utf32Char theUCharNext)
+{
+ if (myUChar == 0)
+ {
+ return 0.0f;
+ }
+
+ if (FT_HAS_KERNING (myFTFace) == 0 || theUCharNext == 0
+ || FT_Get_Kerning (myFTFace, myUChar, theUCharNext, FT_KERNING_UNFITTED, &myKernAdvance) != 0)
+ {
+ return fromFTPoints<float> (myFTFace->glyph->advance.y);
+ }
+ return fromFTPoints<float> (myKernAdvance.y + myFTFace->glyph->advance.y);
+}
projects / occt.git / blobdiff