void CGUITextLayout::AppendToUTF32(const CStdStringW &utf16, character_t colStyle, vecText &utf32)
{
// NOTE: Assumes a single line of text
utf32.reserve(utf32.size() + utf16.size());
for (unsigned int i = 0; i < utf16.size(); i++)
utf32.push_back(utf16[i] | colStyle);
}
void CGUIFont::DrawScrollingText(float x, float y, const vecColors &colors, color_t shadowColor,
const vecText &text, uint32_t alignment, float maxWidth, const CScrollInfo &scrollInfo)
{
if (!m_font) return;
if (!shadowColor) shadowColor = m_shadowColor;
if (!text.size() || ClippedRegionIsEmpty(x, y, maxWidth, alignment))
return; // nothing to render
if (!scrollInfo.m_widthValid)
{
/* Calculate the pixel width of the complete string */
scrollInfo.m_textWidth = GetTextWidth(text);
scrollInfo.m_totalWidth = scrollInfo.m_textWidth + GetTextWidth(scrollInfo.suffix);
scrollInfo.m_widthValid = true;
}
assert(scrollInfo.m_totalWidth != 0);
float textPixelWidth = ROUND(scrollInfo.m_textWidth / g_graphicsContext.GetGUIScaleX());
float suffixPixelWidth = ROUND((scrollInfo.m_totalWidth - scrollInfo.m_textWidth) / g_graphicsContext.GetGUIScaleX());
float offset;
if(scrollInfo.pixelSpeed >= 0)
offset = scrollInfo.pixelPos;
else
offset = scrollInfo.m_totalWidth - scrollInfo.pixelPos;
vecColors renderColors;
for (unsigned int i = 0; i < colors.size(); i++)
renderColors.push_back(g_graphicsContext.MergeAlpha(colors[i] ? colors[i] : m_textColor));
bool scroll = !scrollInfo.waitTime && scrollInfo.pixelSpeed;
if (shadowColor)
{
shadowColor = g_graphicsContext.MergeAlpha(shadowColor);
vecColors shadowColors;
for (unsigned int i = 0; i < renderColors.size(); i++)
shadowColors.push_back((renderColors[i] & 0xff000000) != 0 ? shadowColor : 0);
for (float dx = -offset; dx < maxWidth; dx += scrollInfo.m_totalWidth)
{
m_font->DrawTextInternal(x + dx + 1, y + 1, shadowColors, text, alignment, textPixelWidth, scroll);
m_font->DrawTextInternal(x + dx + scrollInfo.m_textWidth + 1, y + 1, shadowColors, scrollInfo.suffix, alignment, suffixPixelWidth, scroll);
}
}
for (float dx = -offset; dx < maxWidth; dx += scrollInfo.m_totalWidth)
{
m_font->DrawTextInternal(x + dx, y, renderColors, text, alignment, textPixelWidth, scroll);
m_font->DrawTextInternal(x + dx + scrollInfo.m_textWidth, y, renderColors, scrollInfo.suffix, alignment, suffixPixelWidth, scroll);
}
g_graphicsContext.RestoreClipRegion();
}
void CGUIFont::DrawScrollingText(float x, float y, const vecColors &colors, color_t shadowColor,
const vecText &text, uint32_t alignment, float maxWidth, CScrollInfo &scrollInfo)
{
if (!m_font) return;
if (!shadowColor) shadowColor = m_shadowColor;
float spaceWidth = GetCharWidth(L' ');
// max chars on screen + extra margin chars
vecText::size_type maxChars =
std::min<vecText::size_type>(
(text.size() + (vecText::size_type)scrollInfo.suffix.size()),
(vecText::size_type)((maxWidth * 1.05f) / spaceWidth));
if (!text.size() || ClippedRegionIsEmpty(x, y, maxWidth, alignment))
return; // nothing to render
maxWidth = ROUND(maxWidth / g_graphicsContext.GetGUIScaleX());
// draw at our scroll position
// we handle the scrolling as follows:
// We scroll on a per-pixel basis up until we have scrolled the first character outside
// of our viewport, whereby we cycle the string around, and reset the scroll position.
//
// pixelPos is the amount in pixels to move the string by.
// characterPos is the amount in characters to rotate the string by.
//
float offset = scrollInfo.pixelPos;
if (!scrollInfo.waitTime)
{
// move along by the appropriate scroll amount
float scrollAmount = fabs(scrollInfo.GetPixelsPerFrame() * g_graphicsContext.GetGUIScaleX());
if (scrollInfo.pixelSpeed > 0)
{
// we want to move scrollAmount, grab the next character
float charWidth = GetCharWidth(scrollInfo.GetCurrentChar(text));
if (scrollInfo.pixelPos + scrollAmount < charWidth)
scrollInfo.pixelPos += scrollAmount; // within the current character
else
{ // past the current character, decrement scrollAmount by the charWidth and move to the next character
while (scrollInfo.pixelPos + scrollAmount >= charWidth)
{
scrollAmount -= (charWidth - scrollInfo.pixelPos);
scrollInfo.pixelPos = 0;
scrollInfo.characterPos++;
if (scrollInfo.characterPos >= text.size() + scrollInfo.suffix.size())
{
scrollInfo.Reset();
break;
}
charWidth = GetCharWidth(scrollInfo.GetCurrentChar(text));
}
}
offset = scrollInfo.pixelPos;
}
else if (scrollInfo.pixelSpeed < 0)
{ // scrolling backwards
// we want to move scrollAmount, grab the next character
float charWidth = GetCharWidth(scrollInfo.GetCurrentChar(text));
if (scrollInfo.pixelPos + scrollAmount < charWidth)
scrollInfo.pixelPos += scrollAmount; // within the current character
else
{ // past the current character, decrement scrollAmount by the charWidth and move to the next character
while (scrollInfo.pixelPos + scrollAmount >= charWidth)
{
scrollAmount -= (charWidth - scrollInfo.pixelPos);
scrollInfo.pixelPos = 0;
if (scrollInfo.characterPos == 0)
{
scrollInfo.Reset();
scrollInfo.characterPos = text.size() + scrollInfo.suffix.size() - 1;
break;
}
scrollInfo.characterPos--;
charWidth = GetCharWidth(scrollInfo.GetCurrentChar(text));
}
}
offset = charWidth - scrollInfo.pixelPos;
}
}
else
scrollInfo.waitTime--;
// Now rotate our string as needed, only take a slightly larger then visible part of the text.
unsigned int pos = scrollInfo.characterPos;
vecText renderText;
renderText.reserve(maxChars);
for (vecText::size_type i = 0; i < maxChars; i++)
{
if (pos >= text.size() + scrollInfo.suffix.size())
pos = 0;
if (pos < text.size())
renderText.push_back(text[pos]);
else
renderText.push_back(scrollInfo.suffix[pos - text.size()]);
pos++;
}
vecColors renderColors;
for (unsigned int i = 0; i < colors.size(); i++)
renderColors.push_back(g_graphicsContext.MergeAlpha(colors[i] ? colors[i] : m_textColor));
bool scroll = !scrollInfo.waitTime && scrollInfo.pixelSpeed;
if (shadowColor)
{
shadowColor = g_graphicsContext.MergeAlpha(shadowColor);
vecColors shadowColors;
for (unsigned int i = 0; i < renderColors.size(); i++)
shadowColors.push_back((renderColors[i] & 0xff000000) != 0 ? shadowColor : 0);
m_font->DrawTextInternal(x - offset + 1, y + 1, shadowColors, renderText, alignment, maxWidth + scrollInfo.pixelPos + m_font->GetLineHeight(2.0f), scroll);
}
m_font->DrawTextInternal(x - offset, y, renderColors, renderText, alignment, maxWidth + scrollInfo.pixelPos + m_font->GetLineHeight(2.0f), scroll);
g_graphicsContext.RestoreClipRegion();
}
void CGUIFontTTFBase::BuildTextCoordinates(float x, float y, const vecColors &colors, color_t shadowColor,
const vecText &text, uint32_t alignment, float maxPixelWidth, bool scrolling, FontCoordsIndiced& pData)
{
// Check if we will really need to truncate or justify the text
m_originX = x;
m_originY = y;
if ( alignment & XBFONT_TRUNCATED )
{
if ( maxPixelWidth <= 0.0f || GetTextWidthInternal(text.begin(), text.end()) <= maxPixelWidth)
alignment &= ~XBFONT_TRUNCATED;
}
else if ( alignment & XBFONT_JUSTIFIED )
{
if ( maxPixelWidth <= 0.0f )
alignment &= ~XBFONT_JUSTIFIED;
}
// calculate sizing information
float startX = 0;
float startY = (alignment & XBFONT_CENTER_Y) ? -0.5f*(m_cellHeight-2) : 0; // vertical centering
if ( alignment & (XBFONT_RIGHT | XBFONT_CENTER_X) )
{
// Get the extent of this line
float w = GetTextWidthInternal( text.begin(), text.end() );
if ( alignment & XBFONT_TRUNCATED && w > maxPixelWidth )
w = maxPixelWidth;
if ( alignment & XBFONT_CENTER_X)
w *= 0.5f;
// Offset this line's starting position
startX -= w;
}
float spacePerLetter = 0; // for justification effects
#if 0
if ( alignment & XBFONT_JUSTIFIED )
{
// first compute the size of the text to render in both characters and pixels
unsigned int lineChars = 0;
float linePixels = 0;
for (vecText::const_iterator pos = text.begin(); pos != text.end(); pos++)
{
Character *ch = GetCharacter(*pos);
if (ch)
{ // spaces have multiple times the justification spacing of normal letters
lineChars += ((*pos & 0xffff) == L' ') ? justification_word_weight : 1;
linePixels += ch->advance;
}
}
if (lineChars > 1)
spacePerLetter = (maxPixelWidth - linePixels) / (lineChars - 1);
}
#endif
ReloadFace();
#ifdef HAS_HARFBUZZ_NG
int i = 0;
wchar_t strW[text.size()];
for (vecText::const_iterator pos = text.begin(); pos != text.end(); pos++)
{
wchar_t letter = (wchar_t)((*pos) & 0xffff);
strW[i] = letter;
i++;
}
hb_buffer_t *hb_buffer = hb_buffer_create(text.size());
hb_buffer_set_unicode_funcs(hb_buffer, hb_glib_get_unicode_funcs());
hb_buffer_add_utf32(hb_buffer, (const uint32_t*) strW, text.size(), 0, text.size());
hb_buffer_set_direction(hb_buffer, HB_DIRECTION_LTR);
hb_shape (hb_font, hb_buffer, NULL, 0);
unsigned int glyph_info_len;
hb_glyph_info_t *hb_glyph = hb_buffer_get_glyph_infos (hb_buffer, &glyph_info_len);
hb_glyph_position_t *hb_position = hb_buffer_get_glyph_positions (hb_buffer, &glyph_info_len);
#else /* HAS_HARFBUZZ_NG */
FT_Vector delta;
Character* previousCh = NULL;
#endif
float cursorX = 0; // current position along the line
for (vecText::const_iterator pos = text.begin(); pos != text.end(); pos++)
{
// If starting text on a new line, determine justification effects
// Get the current letter in the CStdString
color_t color = (*pos & 0xff0000) >> 16;
if (color >= colors.size())
color = 0;
color = colors[color];
// grab the next character
Character *ch = GetCharacter(*pos);
if (!ch) continue;
if ( alignment & XBFONT_TRUNCATED )
{
// Check if we will be exceeded the max allowed width
if ( cursorX + ch->advance + 3 * m_ellipsesWidth > maxPixelWidth )
{
// Yup. Let's draw the ellipses, then bail
// Perhaps we should really bail to the next line in this case??
Character *period = GetCharacter(L'.');
if (!period)
break;
for (int i = 0; i < 3; i++)
{
BuildCharacterCoordinates(startX + cursorX, startY, period, color, shadowColor, !scrolling, pData);
cursorX += period->advance;
}
break;
}
}
else if (maxPixelWidth > 0 && cursorX > maxPixelWidth)
break; // exceeded max allowed width - stop rendering
#ifdef HAS_HARFBUZZ_NG
BuildCharacterCoordinates(startX + cursorX + (hb_position->x_offset * (1./64)), startY - (hb_position->y_offset * (1./64)), ch, color, shadowColor, !scrolling, pData);
if ( alignment & XBFONT_JUSTIFIED )
{
if ((*pos & 0xffff) == L' ')
cursorX += (hb_position->x_advance * (1./64)) + spacePerLetter * justification_word_weight;
else
cursorX += (hb_position->x_advance * (1./64)) + spacePerLetter;
}
else
cursorX += hb_position->x_advance * (1./64);
hb_glyph++;
hb_position++;
#else
if (previousCh)
{
FT_Get_Kerning(m_face, previousCh->glyphIndex, ch->glyphIndex,
FT_KERNING_DEFAULT, &delta);
cursorX += (float) (delta.x / 64);
}
BuildCharacterCoordinates(startX + cursorX, startY, ch, color, shadowColor, !scrolling, pData);
if ( alignment & XBFONT_JUSTIFIED )
{
if ((*pos & 0xffff) == L' ')
cursorX += ch->advance + spacePerLetter * justification_word_weight;
else
cursorX += ch->advance + spacePerLetter;
}
else
cursorX += ch->advance;
previousCh = ch;
#endif
}
#ifdef HAS_HARFBUZZ_NG
hb_buffer_destroy(hb_buffer);
#endif
}
