mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-20 11:05:44 +00:00
96 lines
3.4 KiB
C++
96 lines
3.4 KiB
C++
//=============================================================================
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//
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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//
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//
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// Copyright 2016 Sandia Corporation.
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// Copyright 2016 UT-Battelle, LLC.
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// Copyright 2016 Los Alamos National Security.
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//
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// the U.S. Government retains certain rights in this software.
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//
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//=============================================================================
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#include <vtkm/rendering/BitmapFont.h>
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namespace vtkm {
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namespace rendering {
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BitmapFont::BitmapFont()
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{
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for (int i=0; i<256; ++i)
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ShortMap[i] = 0;
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this->PadL=0;
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this->PadR=0;
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this->PadT=0;
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this->PadB=0;
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}
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const vtkm::rendering::BitmapFont::Character &
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BitmapFont::GetChar(char c) const
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{
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std::size_t mappedCharIndex =
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static_cast<std::size_t>(this->ShortMap[(unsigned char)c]);
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return this->Chars[mappedCharIndex];
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}
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vtkm::Float32
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BitmapFont::GetTextWidth(const std::string &text) const
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{
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vtkm::Float32 width = 0;
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for (unsigned int i=0; i<text.length(); ++i)
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{
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Character c = this->GetChar(text[i]);
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char nextchar = (i < text.length()-1) ? text[i+1] : 0;
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const bool kerning = true;
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if (kerning && nextchar>0)
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width += vtkm::Float32(c.kern[int(nextchar)]) / vtkm::Float32(this->Height);
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width += vtkm::Float32(c.adv) / vtkm::Float32(this->Height);
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}
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return width;
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}
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void BitmapFont::GetCharPolygon(char character,
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vtkm::Float32 &x, vtkm::Float32 &y,
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vtkm::Float32 &vl, vtkm::Float32 &vr,
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vtkm::Float32 &vt, vtkm::Float32 &vb,
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vtkm::Float32 &tl, vtkm::Float32 &tr,
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vtkm::Float32 &tt, vtkm::Float32 &tb,
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char nextchar) const
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{
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Character c = this->GetChar(character);
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// By default, the origin for the font is at the
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// baseline. That's nice, but we'd rather it
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// be at the actual bottom, so create an offset.
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vtkm::Float32 yoff = -vtkm::Float32(this->Descender) / vtkm::Float32(this->Height);
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tl = vtkm::Float32(c.x + this->PadL) / vtkm::Float32(this->ImgW);
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tr = vtkm::Float32(c.x + c.w - this->PadR) / vtkm::Float32(this->ImgW);
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tt = 1.f - vtkm::Float32(c.y + this->PadT) / vtkm::Float32(this->ImgH);
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tb = 1.f - vtkm::Float32(c.y + c.h - this->PadB) / vtkm::Float32(this->ImgH);
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vl = x + vtkm::Float32(c.offx + this->PadL) / vtkm::Float32(this->Height);
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vr = x + vtkm::Float32(c.offx + c.w - this->PadR) / vtkm::Float32(this->Height);
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vt = yoff + y + vtkm::Float32(c.offy - this->PadT) / vtkm::Float32(this->Height);
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vb = yoff + y + vtkm::Float32(c.offy - c.h + this->PadB) / vtkm::Float32(this->Height);
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const bool kerning = true;
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if (kerning && nextchar>0)
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x += vtkm::Float32(c.kern[int(nextchar)]) / vtkm::Float32(this->Height);
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x += vtkm::Float32(c.adv) / vtkm::Float32(this->Height);
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}
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}
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} // namespace vtkm::rendering
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