mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-08 21:33:55 +00:00
87 lines
3.1 KiB
C++
87 lines
3.1 KiB
C++
//============================================================================
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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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#include <vtkm/rendering/BitmapFont.h>
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namespace vtkm
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{
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namespace rendering
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{
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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& BitmapFont::GetChar(char c) const
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{
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std::size_t mappedCharIndex = 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 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,
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vtkm::Float32& y,
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vtkm::Float32& vl,
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vtkm::Float32& vr,
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vtkm::Float32& vt,
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vtkm::Float32& vb,
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vtkm::Float32& tl,
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vtkm::Float32& tr,
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vtkm::Float32& tt,
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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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