void createLayout (TextLayout& layout, const AttributedString& text, IDWriteFactory& directWriteFactory,
ID2D1Factory& direct2dFactory, IDWriteFontCollection& 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());
ComSmartPtr<IDWriteTextLayout> dwTextLayout;
if (! setupLayout (text, layout.getWidth(), layout.getHeight(), *renderTarget,
directWriteFactory, fontCollection, dwTextLayout))
return;
UINT32 actualLineCount = 0;
hr = dwTextLayout->GetLineMetrics (nullptr, 0, &actualLineCount);
layout.ensureStorageAllocated (actualLineCount);
{
ComSmartPtr<CustomDirectWriteTextRenderer> textRenderer (new CustomDirectWriteTextRenderer (fontCollection, text));
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());
float yAdjustment = 0;
const float extraLineSpacing = text.getLineSpacing();
for (int i = 0; i < numLines; ++i)
{
TextLayout::Line& line = layout.getLine (i);
line.stringRange = Range<int> (lastLocation, (int) lastLocation + dwLineMetrics[i].length);
line.lineOrigin.y += yAdjustment;
yAdjustment += extraLineSpacing;
lastLocation += dwLineMetrics[i].length;
}
}
void createLayout (TextLayout& layout, const AttributedString& text,
IDWriteFactory& directWriteFactory,
IDWriteFontCollection& fontCollection,
ID2D1DCRenderTarget& renderTarget)
{
ComSmartPtr<IDWriteTextLayout> dwTextLayout;
if (! setupLayout (text, layout.getWidth(), layout.getHeight(), renderTarget,
directWriteFactory, fontCollection, dwTextLayout))
return;
UINT32 actualLineCount = 0;
HRESULT hr = dwTextLayout->GetLineMetrics (nullptr, 0, &actualLineCount);
layout.ensureStorageAllocated (actualLineCount);
{
ComSmartPtr<CustomDirectWriteTextRenderer> textRenderer (new CustomDirectWriteTextRenderer (fontCollection, text));
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());
float yAdjustment = 0;
const float extraLineSpacing = text.getLineSpacing();
for (int i = 0; i < numLines; ++i)
{
TextLayout::Line& line = layout.getLine (i);
line.stringRange = Range<int> (lastLocation, (int) lastLocation + dwLineMetrics[i].length);
line.lineOrigin.y += yAdjustment;
yAdjustment += extraLineSpacing;
lastLocation += dwLineMetrics[i].length;
}
}
void createLayout (const AttributedString& text, TextLayout& layout)
{
tokens.ensureStorageAllocated (64);
layout.ensureStorageAllocated (totalLines);
addTextRuns (text);
layoutRuns ((int) layout.getWidth());
int charPosition = 0;
int lineStartPosition = 0;
int runStartPosition = 0;
TextLayout::Line* glyphLine = new TextLayout::Line();
TextLayout::Run* glyphRun = new TextLayout::Run();
for (int i = 0; i < tokens.size(); ++i)
{
const Token* const t = tokens.getUnchecked (i);
const Point<float> tokenPos (t->area.getPosition().toFloat());
Array <int> newGlyphs;
Array <float> xOffsets;
t->font.getGlyphPositions (t->text.trimEnd(), newGlyphs, xOffsets);
glyphRun->glyphs.ensureStorageAllocated (glyphRun->glyphs.size() + newGlyphs.size());
for (int j = 0; j < newGlyphs.size(); ++j)
{
if (charPosition == lineStartPosition)
glyphLine->lineOrigin = tokenPos.translated (0, t->font.getAscent());
const float x = xOffsets.getUnchecked (j);
glyphRun->glyphs.add (TextLayout::Glyph (newGlyphs.getUnchecked(j),
Point<float> (tokenPos.getX() + x, 0),
xOffsets.getUnchecked (j + 1) - x));
++charPosition;
}
if (t->isWhitespace || t->isNewLine)
++charPosition;
const Token* const nextToken = tokens [i + 1];
if (nextToken == nullptr) // this is the last token
{
addRun (glyphLine, glyphRun, t, runStartPosition, charPosition);
glyphLine->stringRange = Range<int> (lineStartPosition, charPosition);
layout.addLine (glyphLine);
}
else
{
if (t->font != nextToken->font || t->colour != nextToken->colour)
{
addRun (glyphLine, glyphRun, t, runStartPosition, charPosition);
runStartPosition = charPosition;
glyphRun = new TextLayout::Run();
}
if (t->line != nextToken->line)
{
addRun (glyphLine, glyphRun, t, runStartPosition, charPosition);
glyphLine->stringRange = Range<int> (lineStartPosition, charPosition);
layout.addLine (glyphLine);
runStartPosition = charPosition;
lineStartPosition = charPosition;
glyphLine = new TextLayout::Line();
glyphRun = new TextLayout::Run();
}
}
}
if ((text.getJustification().getFlags() & (Justification::right | Justification::horizontallyCentred)) != 0)
{
const int totalW = (int) layout.getWidth();
for (int i = 0; i < totalLines; ++i)
{
const int lineW = getLineWidth (i);
float dx = 0;
if ((text.getJustification().getFlags() & Justification::right) != 0)
dx = (float) (totalW - lineW);
else
dx = (totalW - lineW) / 2.0f;
TextLayout::Line& glyphLine = layout.getLine (i);
glyphLine.lineOrigin.x += dx;
}
}
}
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);
}
}
