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Gfx: Improve line trimming with D2D when one line is visible

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This commit is contained in:
Birunthan Mohanathas 2013-08-10 15:26:50 +03:00
parent 34abccc29b
commit 56218f7af4
1 changed files with 22 additions and 7 deletions
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29
Common/Gfx/TextFormatD2D.cpp
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@ -70,15 +70,30 @@ void TextFormatD2D::CreateLayout(
CanvasD2D::c_DWFactory->CreateTextLayout( CanvasD2D::c_DWFactory->CreateTextLayout(
str, strLen, m_TextFormat.Get(), maxW, maxH, m_TextLayout.ReleaseAndGetAddressOf()); str, strLen, m_TextFormat.Get(), maxW, maxH, m_TextLayout.ReleaseAndGetAddressOf());
if (gdiEmulation && m_TextLayout) if (m_TextLayout)
{ {
Microsoft::WRL::ComPtr<IDWriteTextLayout1> textLayout1; if (gdiEmulation)
m_TextLayout.As(&textLayout1); {
Microsoft::WRL::ComPtr<IDWriteTextLayout1> textLayout1;
m_TextLayout.As(&textLayout1);
const float xOffset = m_TextFormat->GetFontSize() / 6.0f; const float xOffset = m_TextFormat->GetFontSize() / 6.0f;
const float emOffset = xOffset / 24.0f; const float emOffset = xOffset / 24.0f;
const DWRITE_TEXT_RANGE range = {0, strLen}; const DWRITE_TEXT_RANGE range = {0, strLen};
textLayout1->SetCharacterSpacing(emOffset, emOffset, 0.0f, range); textLayout1->SetCharacterSpacing(emOffset, emOffset, 0.0f, range);
}
UINT32 lineCount = 0;
DWRITE_LINE_METRICS lineMetrics[2];
HRESULT hr = m_TextLayout->GetLineMetrics(lineMetrics, _countof(lineMetrics), &lineCount);
if (SUCCEEDED(hr) &&
lineMetrics[0].isTrimmed &&
lineMetrics[1].isTrimmed &&
lineMetrics[1].height == 0.0f)
{
m_TextLayout->SetWordWrapping(DWRITE_WORD_WRAPPING_NO_WRAP);
return;
}
} }
} }
} }