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#ifdef WIN32 // Windows API-dependent unit
#include "SvgUtils.h"
#include "WindowsSvgDC.h"
#include "WindowsSvgFont.h"
using namespace std;
SvgDC &GetSystemDC()
{
static WindowsSvgDC dc;
return dc;
}
WindowsSvgDC::WindowsSvgDC(HDC hDC)
: m_pixelPerInchX(-1),
m_pixelPerInchY(-1)
{
if (hDC == NULL)
{
m_ownDC = true;
m_hDC = GetWindowDC(NULL);
}
else
{
m_ownDC = false;
}
}
WindowsSvgDC::~WindowsSvgDC()
{
if (m_ownDC)
{
ReleaseDC(NULL, m_hDC);
}
for (FontsItTp it = m_fonts.begin(); it != m_fonts.end(); it++)
{
delete *it;
}
}
double WindowsSvgDC::GetConversionPrecisionFactor() const
{
return 1000.0;
}
double WindowsSvgDC::PixelsToInches(unsigned int pixels, bool horizontal) const
{
return static_cast<double>(pixels)
/ (horizontal ? GetPixelsPerInchX() : GetPixelsPerInchY());
}
unsigned int WindowsSvgDC::InchesToPixels(double inches, bool horizontal) const
{
return static_cast<unsigned int>(SvgUtilsC::Round(inches
* (horizontal ? GetPixelsPerInchX() : GetPixelsPerInchY())));
}
int WindowsSvgDC::GetPixelsPerInchX() const
{
if (m_pixelPerInchX < 0)
{
m_pixelPerInchX =
SvgUtilsC::Round(GetConversionPrecisionFactor() * GetDeviceCaps(m_hDC, LOGPIXELSX));
}
return m_pixelPerInchX;
}
int WindowsSvgDC::GetPixelsPerInchY() const
{
if (m_pixelPerInchY < 0)
{
m_pixelPerInchY =
SvgUtilsC::Round(GetConversionPrecisionFactor() * GetDeviceCaps(m_hDC, LOGPIXELSY));
}
return m_pixelPerInchY;
}
const SvgFontC *WindowsSvgDC::GetFont(
double heightInch, unsigned int weight, bool isItalic, const string &name) const
{
WindowsSvgFontC font(0, heightInch, weight, isItalic, name);
FontsItTp it = m_fonts.find(&font);
WindowsSvgFontC *pFont;
if (it == m_fonts.end())
{
pFont = new WindowsSvgFontC(GetNextFontId(), heightInch, weight, isItalic, name);
pFont->Create(GetPixelsPerInchX());
m_fonts.insert(pFont);
m_fontIds[pFont->GetId()] = pFont;
}
else
{
pFont = *it;
}
return pFont;
}
double WindowsSvgDC::GetFontBaseLineHeightRatio(unsigned int fontId) const
{
TEXTMETRIC tm;
GetFontMetric(fontId, tm);
return static_cast<double>(tm.tmAscent) / tm.tmHeight;
}
bool WindowsSvgDC::GetFontMetric(unsigned int fontId, TEXTMETRIC &metric) const
{
FontIdsItTp it = m_fontIds.find(fontId);
if (it == m_fontIds.end())
{
return false;
}
HGDIOBJ oldObj = SelectObject(m_hDC, *it->second);
BOOL result = GetTextMetrics(m_hDC, &metric);
SelectObject(m_hDC, oldObj);
return result == TRUE;
}
double WindowsSvgDC::GetTextPartialExtents(
const wstring &text, unsigned int fontId, double offsetInch, vector<double> &extentsInch) const
{
unsigned int textLen = text.length();
if (textLen > 0)
{
FontIdsItTp it = m_fontIds.find(fontId);
if (it == m_fontIds.end())
{
return -1.0;
}
HGDIOBJ oldObj = SelectObject(m_hDC, *it->second);
vector<int> extentsPx;
extentsPx.resize(textLen);
SIZE strSize;
GetTextExtentExPointW(m_hDC, text.c_str(), textLen, 0, NULL, &extentsPx.front(), &strSize);
extentsInch.resize(textLen);
for (unsigned int i = 0; i < textLen; i++)
{
extentsInch[i] = PixelsToInches(extentsPx[i], true) + offsetInch;
}
SelectObject(m_hDC, oldObj);
return offsetInch + PixelsToInches(strSize.cx, true);
}
return offsetInch;
}
double WindowsSvgDC::GetTabCharExtent(unsigned int fontId, double offsetInch) const
{
FontIdsItTp it = m_fontIds.find(fontId);
if (it == m_fontIds.end())
{
return -1.0;
}
HGDIOBJ oldObj = SelectObject(m_hDC, *it->second);
DWORD extent = GetTabbedTextExtentW(m_hDC, L"\t", 1, 0, NULL);
SelectObject(m_hDC, oldObj);
return PixelsToInches(extent & 0xFFFF, true) + offsetInch;
}
unsigned int WindowsSvgDC::GetNextFontId() const
{
static unsigned int id = 0;
return ++id;
}
#endif // Windows API-dependent unit
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