bool setupLayout (const AttributedString& text, const float maxWidth, const float maxHeight,
ID2D1RenderTarget& renderTarget, IDWriteFactory& directWriteFactory,
IDWriteFontCollection& fontCollection, ComSmartPtr<IDWriteTextLayout>& textLayout)
{
// To add color to text, we need to create a D2D render target
// Since we are not actually rendering to a D2D context we create a temporary GDI render target
Font defaultFont;
BOOL fontFound = false;
uint32 fontIndex;
fontCollection.FindFamilyName (defaultFont.getTypeface()->getName().toWideCharPointer(), &fontIndex, &fontFound);
if (! fontFound)
fontIndex = 0;
ComSmartPtr<IDWriteFontFamily> dwFontFamily;
HRESULT hr = fontCollection.GetFontFamily (fontIndex, dwFontFamily.resetAndGetPointerAddress());
ComSmartPtr<IDWriteFont> dwFont;
hr = dwFontFamily->GetFirstMatchingFont (DWRITE_FONT_WEIGHT_NORMAL, DWRITE_FONT_STRETCH_NORMAL, DWRITE_FONT_STYLE_NORMAL,
dwFont.resetAndGetPointerAddress());
jassert (dwFont != nullptr);
const float defaultFontHeightToEmSizeFactor = getFontHeightToEmSizeFactor (*dwFont);
ComSmartPtr<IDWriteTextFormat> dwTextFormat;
hr = directWriteFactory.CreateTextFormat (defaultFont.getTypefaceName().toWideCharPointer(), &fontCollection,
DWRITE_FONT_WEIGHT_REGULAR, DWRITE_FONT_STYLE_NORMAL, DWRITE_FONT_STRETCH_NORMAL,
defaultFont.getHeight() * defaultFontHeightToEmSizeFactor,
L"en-us", dwTextFormat.resetAndGetPointerAddress());
setTextFormatProperties (text, *dwTextFormat);
{
DWRITE_TRIMMING trimming = { DWRITE_TRIMMING_GRANULARITY_CHARACTER, 0, 0 };
ComSmartPtr<IDWriteInlineObject> trimmingSign;
hr = directWriteFactory.CreateEllipsisTrimmingSign (dwTextFormat, trimmingSign.resetAndGetPointerAddress());
hr = dwTextFormat->SetTrimming (&trimming, trimmingSign);
}
const int textLen = text.getText().length();
hr = directWriteFactory.CreateTextLayout (text.getText().toWideCharPointer(), textLen, dwTextFormat,
maxWidth, maxHeight, textLayout.resetAndGetPointerAddress());
if (FAILED (hr) || textLayout == nullptr)
return false;
const int numAttributes = text.getNumAttributes();
for (int i = 0; i < numAttributes; ++i)
addAttributedRange (*text.getAttribute (i), *textLayout, textLen, renderTarget, fontCollection);
return true;
}
void addTextRuns (const AttributedString& text)
{
Font defaultFont;
Array<RunAttribute> runAttributes;
{
const int stringLength = text.getText().length();
int rangeStart = 0;
FontAndColour lastFontAndColour;
// Iterate through every character in the string
for (int i = 0; i < stringLength; ++i)
{
FontAndColour newFontAndColour;
newFontAndColour.font = &defaultFont;
const int numCharacterAttributes = text.getNumAttributes();
for (int j = 0; j < numCharacterAttributes; ++j)
{
const AttributedString::Attribute* const attr = text.getAttribute (j);
// Check if the current character falls within the range of a font attribute
if (attr->getFont() != nullptr && (i >= attr->range.getStart()) && (i < attr->range.getEnd()))
newFontAndColour.font = attr->getFont();
// Check if the current character falls within the range of a foreground colour attribute
if (attr->getColour() != nullptr && (i >= attr->range.getStart()) && (i < attr->range.getEnd()))
newFontAndColour.colour = *attr->getColour();
}
if (i > 0 && (newFontAndColour != lastFontAndColour || i == stringLength - 1))
{
runAttributes.add (RunAttribute (lastFontAndColour,
Range<int> (rangeStart, (i < stringLength - 1) ? i : (i + 1))));
rangeStart = i;
}
lastFontAndColour = newFontAndColour;
}
}
for (int i = 0; i < runAttributes.size(); ++i)
{
const RunAttribute& r = runAttributes.getReference(i);
appendText (text, r.range, *(r.fontAndColour.font), r.fontAndColour.colour);
}
}
void setupLayout (const AttributedString& text, const float& maxWidth, const float& maxHeight,
ID2D1RenderTarget* const renderTarget, IDWriteFactory* const directWriteFactory,
IDWriteFontCollection* const fontCollection, IDWriteTextLayout** dwTextLayout)
{
// To add color to text, we need to create a D2D render target
// Since we are not actually rendering to a D2D context we create a temporary GDI render target
Font defaultFont;
BOOL fontFound = false;
uint32 fontIndex;
fontCollection->FindFamilyName (defaultFont.getTypeface()->getName().toWideCharPointer(), &fontIndex, &fontFound);
if (! fontFound)
fontIndex = 0;
ComSmartPtr<IDWriteFontFamily> dwFontFamily;
HRESULT hr = fontCollection->GetFontFamily (fontIndex, dwFontFamily.resetAndGetPointerAddress());
ComSmartPtr<IDWriteFont> dwFont;
hr = dwFontFamily->GetFirstMatchingFont (DWRITE_FONT_WEIGHT_NORMAL, DWRITE_FONT_STRETCH_NORMAL, DWRITE_FONT_STYLE_NORMAL,
dwFont.resetAndGetPointerAddress());
const float defaultFontHeightToEmSizeFactor = getFontHeightToEmSizeFactor (dwFont);
jassert (directWriteFactory != nullptr);
ComSmartPtr<IDWriteTextFormat> dwTextFormat;
hr = directWriteFactory->CreateTextFormat (defaultFont.getTypefaceName().toWideCharPointer(), fontCollection,
DWRITE_FONT_WEIGHT_REGULAR, DWRITE_FONT_STYLE_NORMAL, DWRITE_FONT_STRETCH_NORMAL,
defaultFont.getHeight() * defaultFontHeightToEmSizeFactor,
L"en-us", dwTextFormat.resetAndGetPointerAddress());
setTextFormatProperties (text, dwTextFormat);
const int textLen = text.getText().length();
hr = directWriteFactory->CreateTextLayout (text.getText().toWideCharPointer(), textLen,
dwTextFormat, maxWidth, maxHeight, dwTextLayout);
const int numAttributes = text.getNumAttributes();
for (int i = 0; i < numAttributes; ++i)
addAttributedRange (*text.getAttribute (i), *dwTextLayout, textLen, renderTarget, fontCollection);
}
void createLayout (TextLayout& layout, const AttributedString& text, IDWriteFactory* const directWriteFactory,
ID2D1Factory* const direct2dFactory, IDWriteFontCollection* const fontCollection)
{
// To add color to text, we need to create a D2D render target
// Since we are not actually rendering to a D2D context we create a temporary GDI render target
D2D1_RENDER_TARGET_PROPERTIES d2dRTProp = D2D1::RenderTargetProperties (D2D1_RENDER_TARGET_TYPE_SOFTWARE,
D2D1::PixelFormat (DXGI_FORMAT_B8G8R8A8_UNORM,
D2D1_ALPHA_MODE_IGNORE),
0, 0,
D2D1_RENDER_TARGET_USAGE_GDI_COMPATIBLE,
D2D1_FEATURE_LEVEL_DEFAULT);
ComSmartPtr<ID2D1DCRenderTarget> renderTarget;
HRESULT hr = direct2dFactory->CreateDCRenderTarget (&d2dRTProp, renderTarget.resetAndGetPointerAddress());
Font defaultFont;
BOOL fontFound = false;
uint32 fontIndex;
fontCollection->FindFamilyName (defaultFont.getTypefaceName().toWideCharPointer(), &fontIndex, &fontFound);
if (! fontFound)
fontIndex = 0;
ComSmartPtr<IDWriteFontFamily> dwFontFamily;
hr = fontCollection->GetFontFamily (fontIndex, dwFontFamily.resetAndGetPointerAddress());
ComSmartPtr<IDWriteFont> dwFont;
hr = dwFontFamily->GetFirstMatchingFont (DWRITE_FONT_WEIGHT_NORMAL, DWRITE_FONT_STRETCH_NORMAL, DWRITE_FONT_STYLE_NORMAL,
dwFont.resetAndGetPointerAddress());
const float defaultFontHeightToEmSizeFactor = getFontHeightToEmSizeFactor (dwFont);
jassert (directWriteFactory != nullptr);
ComSmartPtr<IDWriteTextFormat> dwTextFormat;
hr = directWriteFactory->CreateTextFormat (defaultFont.getTypefaceName().toWideCharPointer(), fontCollection,
DWRITE_FONT_WEIGHT_REGULAR, DWRITE_FONT_STYLE_NORMAL, DWRITE_FONT_STRETCH_NORMAL,
defaultFont.getHeight() * defaultFontHeightToEmSizeFactor,
L"en-us", dwTextFormat.resetAndGetPointerAddress());
setTextFormatProperties (text, dwTextFormat);
const int textLen = text.getText().length();
ComSmartPtr<IDWriteTextLayout> dwTextLayout;
hr = directWriteFactory->CreateTextLayout (text.getText().toWideCharPointer(), textLen,
dwTextFormat, layout.getWidth(),
1.0e7f, dwTextLayout.resetAndGetPointerAddress());
const int numAttributes = text.getNumAttributes();
for (int i = 0; i < numAttributes; ++i)
addAttributedRange (*text.getAttribute (i), dwTextLayout, textLen, renderTarget, fontCollection);
UINT32 actualLineCount = 0;
hr = dwTextLayout->GetLineMetrics (nullptr, 0, &actualLineCount);
layout.ensureStorageAllocated (actualLineCount);
{
ComSmartPtr<CustomDirectWriteTextRenderer> textRenderer (new CustomDirectWriteTextRenderer (fontCollection));
hr = dwTextLayout->Draw (&layout, textRenderer, 0, 0);
}
HeapBlock <DWRITE_LINE_METRICS> dwLineMetrics (actualLineCount);
hr = dwTextLayout->GetLineMetrics (dwLineMetrics, actualLineCount, &actualLineCount);
int lastLocation = 0;
const int numLines = jmin ((int) actualLineCount, layout.getNumLines());
for (int i = 0; i < numLines; ++i)
{
lastLocation = dwLineMetrics[i].length;
layout.getLine(i).stringRange = Range<int> (lastLocation, (int) lastLocation + dwLineMetrics[i].length);
}
}
