SVGnumber WindowsSVGFont::GetStringWidth(const uni_char* text, INT32 len)
{
UINT32 realLen = 0;
SVGnumber stringVisualLen = 0;
if(!text)
{
return 0;
}
if(len < 0)
{
realLen = uni_strlen(text);
}
else
{
realLen = len;
}
if(realLen == 0)
return 0;
for(UINT32 i = 0; i < realLen; i++)
{
stringVisualLen += GetGlyphAdvance(text[i]);
}
return stringVisualLen;
}
BOOL KG3DFontTexture::GetTextPosExtent(LPCWSTR wszText, int cchText, FLOAT fCursorPos, LPINT lpCharPos, FLOAT cchSpace, BOOL bBorder)
{
// ASSERT(((m_dwEffect & KG3DUI_TEXT_STYLE_BORDER) != 0) == (bBorder != 0));
if (NULL == lpCharPos || NULL == wszText || -1 > cchText || 0 == cchText)
return FALSE;
FLOAT penX = 0.0f;
FLOAT penEndX = fCursorPos;
FLOAT scalingX = m_bVertical ? m_fScalingY : m_fScalingX;
FLOAT spaceX = cchSpace * scalingX;
LPCWSTR wszToken = wszText;
for (; *wszToken; ++wszToken)
{
WCHAR const charCode = *wszToken;
WCHAR const charNextCode = *(wszToken + 1);
// hinting and draw
FLOAT glyphAdvX = 0.0f;
FLOAT glyphAdvY = 0.0f;
if (charGlyphHit(charCode))
GetGlyphAdvance(charCode, charNextCode, glyphAdvX, glyphAdvY);
penX += (m_bVertical ? glyphAdvY : glyphAdvX) * scalingX + spaceX;
if (penX > penEndX + 0.0001f)
break;
}
*lpCharPos = (INT)(wszToken - wszText);
return TRUE;
}
bool KG3DFontTexture::GetGlyphAdvance(UINT chText, UINT chNext, FLOAT& fX, FLOAT& fY)
{
FLOAT glyphAdvX = 0.0f;
FLOAT glyphAdvY = 0.0f;
if (GetGlyphAdvance(chText, glyphAdvX, glyphAdvY))
{
FLOAT glyphKernX = 0.0f;
FLOAT glyphKernY = 0.0f;
if (charGlyphKernAdvance(chText, chNext, glyphKernX, glyphKernY))
{
glyphAdvX += glyphKernX;
glyphAdvY += glyphKernY;
}
}
fX = glyphAdvX;
fY = glyphAdvY;
return true;
}
void KG3DFontTexture::DrawString(FLOAT x, FLOAT y, FLOAT xSpace, FLOAT ySpace, LPCWSTR wszText)
{
ASSERT(wszText);
while (*wszText != L'\0')
{
WCHAR wcCurrent = *wszText++;
WCHAR wcNext = *wszText;
FLOAT xAdvance = 0.0f;
FLOAT yAdvance = 0.0f;
if (charGlyphHit(wcCurrent) && GetGlyphAdvance(wcCurrent, wcNext, xAdvance, yAdvance))
{
if (m_uVertex + 12 >= _countof(m_aVertex))
{
ASSERT(m_nTextureID != -1);
m_pRenderer->PrepareVertex(m_nTextureID, m_aVertex, m_uVertex);
m_uVertex = 0;
m_nTextureID = -1;
}
if (m_bVertical && IsVerticalChar(wcCurrent))
DrawCharVertical(x, y, wcCurrent);
else
DrawChar(x, y, wcCurrent);
x += (xAdvance + xSpace) * m_fScalingX;
y += (yAdvance + ySpace) * m_fScalingY;
}
}
if (m_uVertex)
{
ASSERT(m_nTextureID != -1);
m_pRenderer->PrepareVertex(m_nTextureID, m_aVertex, m_uVertex);
m_uVertex = 0;
m_nTextureID = -1;
}
}
BOOL KG3DFontTexture::GetTextExtent(LPCWSTR wszText, int cchText, FLOAT &fWidth, FLOAT &fHeight, FLOAT cchSpace, BOOL bBorder)
{
// ASSERT(((m_dwEffect & KG3DUI_TEXT_STYLE_BORDER) != 0) == (bBorder != 0));
if (wszText == NULL || -1 > cchText || 0 == cchText)
return FALSE;
FLOAT penX = 0.0f;
FLOAT penY = 0.0f;
FLOAT spaceX = cchSpace * m_fScalingX;
FLOAT spaceY = cchSpace * m_fScalingY;
if (cchText == -1)
cchText = (int)wcslen(wszText);
if (cchText > 0)
{
for (int nIndex = 0; nIndex < cchText; ++nIndex)
{
WCHAR wcCurrent = wszText[nIndex];
WCHAR wcNext = wszText[nIndex + 1];
FLOAT glyphAdvX = 0.0f;
FLOAT glyphAdvY = 0.0f;
if (charGlyphHit(wcCurrent))
GetGlyphAdvance(wcCurrent, wcNext, glyphAdvX, glyphAdvY);
penX += glyphAdvX * m_fScalingX + spaceX;
penY += glyphAdvY * m_fScalingY + spaceY;
}
}
fWidth = m_bVertical ? GetCharWidth() * m_fScalingX: penX;
fHeight = !m_bVertical ? GetCharHeight() * m_fScalingY: penY;
return TRUE;
}