rainmeter-studio/Common/Gfx/TextFormatD2D.cpp
2013-04-12 19:41:47 +03:00

225 lines
5.9 KiB
C++

/*
Copyright (C) 2013 Birunthan Mohanathas
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "TextFormatD2D.h"
#include "CanvasD2D.h"
#include "Util/DWriteHelpers.h"
namespace Gfx {
TextFormatD2D::TextFormatD2D() :
m_TextFormat(),
m_TextLayout(),
m_InlineEllipsis()
{
}
TextFormatD2D::~TextFormatD2D()
{
Dispose();
}
void TextFormatD2D::Dispose()
{
if (m_TextFormat)
{
m_TextFormat->Release();
m_TextFormat = nullptr;
}
if (m_TextLayout)
{
m_TextLayout->Release();
m_TextLayout = nullptr;
}
if (m_InlineEllipsis)
{
m_InlineEllipsis->Release();
m_InlineEllipsis = nullptr;
}
}
void TextFormatD2D::CreateLayout(const WCHAR* str, UINT strLen, float maxW, float maxH)
{
bool strChanged = false;
if (strLen != m_LastString.length() ||
memcmp(str, m_LastString.c_str(), (strLen + 1) * sizeof(WCHAR)) != 0)
{
strChanged = true;
m_LastString.assign(str, strLen);
}
if (m_TextLayout && !strChanged)
{
if (maxW != m_TextLayout->GetMaxWidth())
{
m_TextLayout->SetMaxWidth(maxW);
}
if (maxH != m_TextLayout->GetMaxHeight())
{
m_TextLayout->SetMaxWidth(maxH);
}
}
else
{
if (m_TextLayout)
{
m_TextLayout->Release();
m_TextLayout = nullptr;
}
CanvasD2D::c_DWFactory->CreateTextLayout(str, strLen, m_TextFormat, maxW, maxH, &m_TextLayout);
}
}
void TextFormatD2D::SetProperties(
const WCHAR* fontFamily, int size, bool bold, bool italic,
const FontCollection* fontCollection)
{
auto fontCollectionD2D = (FontCollectionD2D*)fontCollection;
Dispose();
WCHAR dwriteFamilyName[LF_FACESIZE];
DWRITE_FONT_WEIGHT dwriteFontWeight =
bold ? DWRITE_FONT_WEIGHT_BOLD : DWRITE_FONT_WEIGHT_REGULAR;
DWRITE_FONT_STYLE dwriteFontStyle =
italic ? DWRITE_FONT_STYLE_ITALIC : DWRITE_FONT_STYLE_NORMAL;
DWRITE_FONT_STRETCH dwriteFontStretch = DWRITE_FONT_STRETCH_NORMAL;
// |fontFamily| uses the GDI/GDI+ font naming convention so try to create DirectWrite font
// using the GDI family name and then create a text format using the DirectWrite family name
// obtained from it.
HRESULT hr = Util::GetDWritePropertiesFromGDIProperties(
CanvasD2D::c_DWFactory, fontFamily, bold, italic, dwriteFontWeight, dwriteFontStyle,
dwriteFontStretch, dwriteFamilyName, _countof(dwriteFamilyName));
if (SUCCEEDED(hr))
{
hr = CanvasD2D::c_DWFactory->CreateTextFormat(
dwriteFamilyName,
nullptr,
dwriteFontWeight,
dwriteFontStyle,
dwriteFontStretch,
size * (4.0f / 3.0f),
L"",
&m_TextFormat);
}
if (FAILED(hr))
{
IDWriteFontCollection* dwriteFontCollection = nullptr;
// If |fontFamily| is not in the system collection, use the font collection from
// |fontCollectionD2D| if possible.
if (!Util::IsFamilyInSystemFontCollection(CanvasD2D::c_DWFactory, fontFamily) &&
(fontCollectionD2D && fontCollectionD2D->InitializeCollection()))
{
IDWriteFont* dwriteFont = Util::FindDWriteFontInFontCollectionByGDIFamilyName(
fontCollectionD2D->m_Collection, fontFamily);
if (dwriteFont)
{
hr = Util::GetFamilyNameFromDWriteFont(
dwriteFont, dwriteFamilyName, _countof(dwriteFamilyName));
{
fontFamily = dwriteFamilyName;
Util::GetPropertiesFromDWriteFont(
dwriteFont, bold, italic, &dwriteFontWeight, &dwriteFontStyle,
&dwriteFontStretch);
}
dwriteFont->Release();
}
dwriteFontCollection = fontCollectionD2D->m_Collection;
}
// Fallback in case above fails.
hr = CanvasD2D::c_DWFactory->CreateTextFormat(
fontFamily,
dwriteFontCollection,
dwriteFontWeight,
dwriteFontStyle,
dwriteFontStretch,
size * (4.0f / 3.0f),
L"",
&m_TextFormat);
}
if (SUCCEEDED(hr))
{
SetHorizontalAlignment(GetHorizontalAlignment());
SetVerticalAlignment(GetVerticalAlignment());
}
else
{
Dispose();
}
}
void TextFormatD2D::SetTrimming(bool trim)
{
IDWriteInlineObject* inlineObject = nullptr;
DWRITE_TRIMMING trimming = {};
DWRITE_WORD_WRAPPING wordWrapping = DWRITE_WORD_WRAPPING_NO_WRAP;
if (trim)
{
if (!m_InlineEllipsis)
{
CanvasD2D::c_DWFactory->CreateEllipsisTrimmingSign(m_TextFormat, &m_InlineEllipsis);
}
inlineObject = m_InlineEllipsis;
trimming.granularity = DWRITE_TRIMMING_GRANULARITY_CHARACTER;
wordWrapping = DWRITE_WORD_WRAPPING_WRAP;
}
m_TextFormat->SetTrimming(&trimming, inlineObject);
m_TextFormat->SetWordWrapping(wordWrapping);
}
void TextFormatD2D::SetHorizontalAlignment(HorizontalAlignment alignment)
{
__super::SetHorizontalAlignment(alignment);
if (m_TextFormat)
{
m_TextFormat->SetTextAlignment(
(alignment == HorizontalAlignment::Left) ? DWRITE_TEXT_ALIGNMENT_LEADING :
(alignment == HorizontalAlignment::Center) ? DWRITE_TEXT_ALIGNMENT_CENTER :
DWRITE_TEXT_ALIGNMENT_TRAILING);
}
}
void TextFormatD2D::SetVerticalAlignment(VerticalAlignment alignment)
{
__super::SetVerticalAlignment(alignment);
if (m_TextFormat)
{
m_TextFormat->SetParagraphAlignment(
(alignment == VerticalAlignment::Top) ? DWRITE_PARAGRAPH_ALIGNMENT_NEAR :
(alignment == VerticalAlignment::Center) ? DWRITE_PARAGRAPH_ALIGNMENT_CENTER :
DWRITE_PARAGRAPH_ALIGNMENT_FAR);
}
}
} // namespace Gfx