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Add missing files in 4f26f77
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Birunthan Mohanathas
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4f26f777c9
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153
Common/Gfx/Util/DWriteHelpers.cpp
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153
Common/Gfx/Util/DWriteHelpers.cpp
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/*
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Copyright (C) 2013 Birunthan Mohanathas
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "DWriteHelpers.h"
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namespace Gfx {
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namespace Util {
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bool GetDWritePropertiesFromGDIProperties(
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IDWriteFactory* factory, const WCHAR* gdiFamilyName, const bool gdiBold, const bool gdiItalic,
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DWRITE_FONT_WEIGHT& dwriteFontWeight, DWRITE_FONT_STYLE& dwriteFontStyle,
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DWRITE_FONT_STRETCH& dwriteFontStretch, WCHAR* dwriteFamilyName, UINT dwriteFamilyNameSize)
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{
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bool result = false;
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IDWriteFont* dwriteFont = CreateDWriteFontFromGDIFamilyName(factory, gdiFamilyName);
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if (dwriteFont)
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{
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if (GetFamilyNameFromDWriteFont(dwriteFont, dwriteFamilyName, dwriteFamilyNameSize))
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{
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dwriteFontWeight = dwriteFont->GetWeight();
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if (gdiBold)
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{
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if (dwriteFontWeight == DWRITE_FONT_WEIGHT_NORMAL)
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{
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dwriteFontWeight = DWRITE_FONT_WEIGHT_BOLD;
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}
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else if (dwriteFontWeight < DWRITE_FONT_WEIGHT_ULTRA_BOLD)
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{
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// If 'gdiFamilyName' was e.g. 'Segoe UI Light', |dwFontWeight| wil be equal to
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// DWRITE_FONT_WEIGHT_LIGHT. If |gdiBold| is true in that case, we need to
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// increase the weight a little more for similar results with GDI+.
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// TODO: Is +100 enough?
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dwriteFontWeight = (DWRITE_FONT_WEIGHT)(dwriteFontWeight + 100);
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}
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}
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dwriteFontStyle = dwriteFont->GetStyle();
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if (gdiItalic && dwriteFontStyle == DWRITE_FONT_STYLE_NORMAL)
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{
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dwriteFontStyle = DWRITE_FONT_STYLE_ITALIC;
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}
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dwriteFontStretch = dwriteFont->GetStretch();
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result = true;
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}
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dwriteFont->Release();
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}
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return result;
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}
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IDWriteFont* CreateDWriteFontFromGDIFamilyName(IDWriteFactory* factory, const WCHAR* gdiFamilyName)
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{
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IDWriteGdiInterop* dwGdiInterop;
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HRESULT hr = factory->GetGdiInterop(&dwGdiInterop);
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if (SUCCEEDED(hr))
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{
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LOGFONT lf = {};
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wcscpy_s(lf.lfFaceName, gdiFamilyName);
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lf.lfHeight = -12;
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lf.lfWeight = FW_DONTCARE;
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lf.lfCharSet = DEFAULT_CHARSET;
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lf.lfOutPrecision = OUT_DEFAULT_PRECIS;
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lf.lfClipPrecision = CLIP_DEFAULT_PRECIS;
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lf.lfQuality = ANTIALIASED_QUALITY;
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lf.lfPitchAndFamily = VARIABLE_PITCH;
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IDWriteFont* dwFont;
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hr = dwGdiInterop->CreateFontFromLOGFONT(&lf, &dwFont);
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if (SUCCEEDED(hr))
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{
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return dwFont;
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}
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dwGdiInterop->Release();
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}
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return nullptr;
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}
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bool GetFamilyNameFromDWriteFont(IDWriteFont* font, WCHAR* buffer, const UINT bufferSize)
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{
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IDWriteFontFamily* dwriteFontFamily;
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HRESULT hr = font->GetFontFamily(&dwriteFontFamily);
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if (SUCCEEDED(hr))
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{
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GetFamilyNameFromDWriteFontFamily(dwriteFontFamily, buffer, bufferSize);
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dwriteFontFamily->Release();
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return true;
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}
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return false;
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}
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bool GetFamilyNameFromDWriteFontFamily(
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IDWriteFontFamily* fontFamily, WCHAR* buffer, const UINT bufferSize)
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{
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bool result = false;
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IDWriteLocalizedStrings* dwFamilyNames;
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HRESULT hr = fontFamily->GetFamilyNames(&dwFamilyNames);
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if (SUCCEEDED(hr))
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{
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// TODO: Determine the best index?
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hr = dwFamilyNames->GetString(0, buffer, bufferSize);
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result = SUCCEEDED(hr);
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dwFamilyNames->Release();
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}
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return result;
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}
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bool IsFamilyInSystemFontCollection(IDWriteFactory* factory, const WCHAR* familyName)
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{
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bool result = false;
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IDWriteFontCollection* systemFontCollection;
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HRESULT hr = factory->GetSystemFontCollection(&systemFontCollection);
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if (SUCCEEDED(hr))
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{
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UINT32 familyNameIndex;
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BOOL familyNameFound;
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HRESULT hr = systemFontCollection->FindFamilyName(
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familyName, &familyNameIndex, &familyNameFound);
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if (SUCCEEDED(hr) && !familyNameFound)
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{
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result = true;
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}
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systemFontCollection->Release();
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}
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return result;
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}
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} // namespace Util
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} // namespace Gfx
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50
Common/Gfx/Util/DWriteHelpers.h
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50
Common/Gfx/Util/DWriteHelpers.h
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@ -0,0 +1,50 @@
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/*
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Copyright (C) 2013 Birunthan Mohanathas
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef RM_GFX_UTIL_DWRITEHELPERS_H_
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#define RM_GFX_UTIL_DWRITEHELPERS_H_
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#include <dwrite.h>
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namespace Gfx {
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namespace Util {
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// Maps the GDI family name and italic/bold flags to the DirectWrite family name, weight, style,
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// and stretch.
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bool GetDWritePropertiesFromGDIProperties(
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IDWriteFactory* factory, const WCHAR* gdiFamilyName, const bool gdiBold, const bool gdiItalic,
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DWRITE_FONT_WEIGHT& dwriteFontWeight, DWRITE_FONT_STYLE& dwriteFontStyle,
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DWRITE_FONT_STRETCH& dwriteFontStretch, WCHAR* dwriteFamilyName, UINT dwriteFamilyNameSize);
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// Creates a IDWriteFont using the GDI family name instead of the DirectWrite family name. For
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// example, 'Segoe UI' and 'Segoe UI Semibold' are separate family names with GDI whereas
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// DirectWrite uses the family name 'Segoe UI' for both and differentiates them by the font
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// style.
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IDWriteFont* CreateDWriteFontFromGDIFamilyName(IDWriteFactory* factory, const WCHAR* fontFamily);
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bool GetFamilyNameFromDWriteFont(IDWriteFont* font, WCHAR* buffer, UINT bufferSize);
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bool GetFamilyNameFromDWriteFontFamily(
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IDWriteFontFamily* fontFamily, WCHAR* buffer, UINT bufferSize);
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bool IsFamilyInSystemFontCollection(IDWriteFactory* factory, const WCHAR* familyName);
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} // namespace Util
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} // namespace Gfx
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#endif
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