inline void FTSimpleLayoutImpl::WrapTextI(const T *buf, const int len,
FTPoint position, int renderMode,
FTBBox *bounds)
{
FTUnicodeStringItr<T> breakItr(buf); // points to the last break character
FTUnicodeStringItr<T> lineStart(buf); // points to the line start
float nextStart = 0.0; // total width of the current line
float breakWidth = 0.0; // width of the line up to the last word break
float currentWidth = 0.0; // width of all characters on the current line
float prevWidth; // width of all characters but the current glyph
float wordLength = 0.0; // length of the block since the last break char
int charCount = 0; // number of characters so far on the line
int breakCharCount = 0; // number of characters before the breakItr
float glyphWidth, advance;
FTBBox glyphBounds;
// Reset the pen position
pen.Y(0);
// If we have bounds mark them invalid
if(bounds)
{
bounds->Invalidate();
}
// Scan the input for all characters that need output
FTUnicodeStringItr<T> prevItr(buf);
for (FTUnicodeStringItr<T> itr(buf); *itr; prevItr = itr++, charCount++)
{
// Find the width of the current glyph
glyphBounds = currentFont->BBox(itr.getBufferFromHere(), 1);
glyphWidth = glyphBounds.Upper().Xf() - glyphBounds.Lower().Xf();
advance = currentFont->Advance(itr.getBufferFromHere(), 1);
prevWidth = currentWidth;
// Compute the width of all glyphs up to the end of buf[i]
currentWidth = nextStart + glyphWidth;
// Compute the position of the next glyph
nextStart += advance;
// See if the current character is a space, a break or a regular character
if((currentWidth > lineLength) || (*itr == '\n'))
{
// A non whitespace character has exceeded the line length. Or a
// newline character has forced a line break. Output the last
// line and start a new line after the break character.
// If we have not yet found a break, break on the last character
if(breakItr == lineStart || (*itr == '\n'))
{
// Break on the previous character
breakItr = prevItr;
breakCharCount = charCount - 1;
breakWidth = prevWidth;
// None of the previous words will be carried to the next line
wordLength = 0;
// If the current character is a newline discard its advance
if(*itr == '\n') advance = 0;
}
float remainingWidth = lineLength - breakWidth;
// Render the current substring
FTUnicodeStringItr<T> breakChar = breakItr;
// move past the break character and don't count it on the next line either
++breakChar; --charCount;
// If the break character is a newline do not render it
if(*breakChar == '\n')
{
++breakChar; --charCount;
}
if(breakCharCount >= 0)
{
OutputWrapped(lineStart.getBufferFromHere(), breakCharCount,
//breakItr.getBufferFromHere() - lineStart.getBufferFromHere(),
position, renderMode, remainingWidth, bounds);
}
// Store the start of the next line
lineStart = breakChar;
// TODO: Is Height() the right value here?
pen -= FTPoint(0, currentFont->LineHeight() * lineSpacing);
// The current width is the width since the last break
nextStart = wordLength + advance;
wordLength += advance;
currentWidth = wordLength + advance;
// Reset the safe break for the next line
breakItr = lineStart;
charCount -= breakCharCount;
}
else if(iswspace(*itr))
{
// This is the last word break position
wordLength = 0;
breakItr = itr;
breakCharCount = charCount;
// Check to see if this is the first whitespace character in a run
if(buf == itr.getBufferFromHere() || !iswspace(*prevItr))
{
// Record the width of the start of the block
breakWidth = currentWidth;
}
}
else
{
wordLength += advance;
}
}
float remainingWidth = lineLength - currentWidth;
// Render any remaining text on the last line
// Disable justification for the last row
if(alignment == FTGL::ALIGN_JUSTIFY)
{
alignment = FTGL::ALIGN_LEFT;
OutputWrapped(lineStart.getBufferFromHere(), -1, position, renderMode,
remainingWidth, bounds);
alignment = FTGL::ALIGN_JUSTIFY;
}
else
{
OutputWrapped(lineStart.getBufferFromHere(), -1, position, renderMode,
remainingWidth, bounds);
}
}
inline void FTSimpleLayoutImpl::WrapTextI(const T *buf, const int len,
FTPoint position, int renderMode,
FTBBox *bounds)
{
FTUnicodeStringItr<T> breakItr(buf); // points to the last break character
FTUnicodeStringItr<T> lineStart(buf); // points to the line start
float nextStart = 0.0; // total width of the current line
float breakWidth = 0.0; // width of the line up to the last word break
float currentWidth = 0.0; // width of all characters on the current line
float prevWidth; // width of all characters but the current glyph
float wordLength = 0.0; // length of the block since the last break char
int charCount = 0; // number of characters so far on the line
int breakCharCount = 0; // number of characters before the breakItr
float glyphWidth, advance;
FTBBox glyphBounds;
bool refresh = false;
// Reset the pen position
pen.Y(0);
// If we have bounds mark them invalid
if(bounds)
{
bounds->Invalidate();
}
//XLOGXN("FTGL1");
// Check if the incoming string is different to the previously
// cached string.
unsigned int i = 0;
for (FTUnicodeStringItr<T> itr(buf); *itr; itr++)
{
XBREAK(i >= 4096);
if (i >= stringCacheCount ||
stringCache[i++] != (unsigned int)*itr)
{
refresh = true;
break;
}
}
//XLOGXN("FTGL2");
if (refresh)
{
//XLOGXN("FTGL3");
stringCacheCount = 0;
layoutGlyphCache.clear();
// Scan the input for all characters that need output
FTUnicodeStringItr<T> prevItr(buf);
for (FTUnicodeStringItr<T> itr(buf); *itr; prevItr = itr++, charCount++)
{
XBREAK(stringCacheCount >= 4096);
stringCache[stringCacheCount++] = (unsigned int)*itr;
// Find the width of the current glyph
glyphBounds = currentFont->BBox(itr.getBufferFromHere(), 1);
glyphWidth = glyphBounds.Upper().Xf() - glyphBounds.Lower().Xf();
advance = currentFont->Advance(itr.getBufferFromHere(), 1);
prevWidth = currentWidth;
// Compute the width of all glyphs up to the end of buf[i]
currentWidth = nextStart + glyphWidth;
// Compute the position of the next glyph
nextStart += advance;
// See if the current character is a space, a break or a regular character
if((currentWidth > lineLength) || (*itr == '\n'))
{
// A non whitespace character has exceeded the line length. Or a
// newline character has forced a line break. Output the last
// line and start a new line after the break character.
// If we have not yet found a break, break on the last character
if(breakItr == lineStart || (*itr == '\n'))
{
// Break on the previous character
breakItr = prevItr;
breakCharCount = charCount - 1;
breakWidth = prevWidth;
// None of the previous words will be carried to the next line
wordLength = 0;
// If the current character is a newline discard its advance
if(*itr == '\n') advance = 0;
}
float remainingWidth = lineLength - breakWidth;
// Render the current substring
FTUnicodeStringItr<T> breakChar = breakItr;
// move past the break character and don't count it on the next line either
++breakChar; --charCount;
// If the break character is a newline do not render it
if(*breakChar == '\n')
{
++breakChar; --charCount;
}
layoutGlyphCacheItem_t cacheItem;
cacheItem.buf = (T*)lineStart.getBufferFromHere();
cacheItem.charCount = breakCharCount;
cacheItem.position = FTPoint(position.X(), position.Y(), position.Z());
cacheItem.remainingWidth = remainingWidth;
cacheItem.penDiff = FTPoint(0, currentFont->LineHeight() * lineSpacing);
layoutGlyphCache.push_back(cacheItem);
lineStart = breakChar;
// The current width is the width since the last break
nextStart = wordLength + advance;
wordLength += advance;
currentWidth = wordLength + advance;
// Reset the safe break for the next line
breakItr = lineStart;
charCount -= breakCharCount;
}
else if(iswspace(*itr))
{
// This is the last word break position
wordLength = 0;
breakItr = itr;
breakCharCount = charCount;
// Check to see if this is the first whitespace character in a run
if(buf == itr.getBufferFromHere() || !iswspace(*prevItr))
{
// Record the width of the start of the block
breakWidth = currentWidth;
}
}
else
{
wordLength += advance;
}
}
//XLOGXN("FTGL4");
float remainingWidth = lineLength - currentWidth;
// Render any remaining text on the last line
// Disable justification for the last row
//XLOGXN("FTGL5");
if(alignment == FTGL::ALIGN_JUSTIFY)
{
alignment = FTGL::ALIGN_LEFT;
layoutGlyphCacheItem_t cacheItem;
cacheItem.buf = (T *)lineStart.getBufferFromHere();
cacheItem.charCount = -1;
cacheItem.position = FTPoint(position.X(), position.Y(), position.Z());
cacheItem.penDiff = FTPoint(0,0,0);
cacheItem.remainingWidth = remainingWidth;
layoutGlyphCache.push_back(cacheItem);
alignment = FTGL::ALIGN_JUSTIFY;
}
else
{
layoutGlyphCacheItem_t cacheItem;
cacheItem.buf = (T *)lineStart.getBufferFromHere();
cacheItem.charCount = -1;
cacheItem.position = FTPoint(position.X(), position.Y(), position.Z());
cacheItem.penDiff = FTPoint(0,0,0);
cacheItem.remainingWidth = remainingWidth;
layoutGlyphCache.push_back(cacheItem);
}
//XLOGXN("FTGL6");
}
//XLOGXN("FTGL7");
// Draw each of the glyphs in the cache.
currentFont->PreRender();
//XLOGXN("FTGL8");
std::list<layoutGlyphCacheItem_t>::iterator it;
for (it = layoutGlyphCache.begin(); it != layoutGlyphCache.end(); it++)
{
layoutGlyphCacheItem_t cacheItem = (*it);
OutputWrapped((T*)cacheItem.buf,
cacheItem.charCount,
cacheItem.position,
renderMode,
cacheItem.remainingWidth,
bounds);
pen -= cacheItem.penDiff;
}
//XLOGXN("FTGL9");
currentFont->PostRender();
}