// http://www.codeproject.com/KB/GDI-plus/measurestring.aspx
RectF MeasureTextAccurate(Graphics* g, Font* f, const WCHAR* s, int len) {
if (0 == len) {
return RectF(0, 0, 0, 0); // TODO: should set height to font's height
}
// note: frankly, I don't see a difference between those StringFormat variations
StringFormat sf(StringFormat::GenericTypographic());
sf.SetFormatFlags(sf.GetFormatFlags() | StringFormatFlagsMeasureTrailingSpaces);
// StringFormat sf(StringFormat::GenericDefault());
// StringFormat sf;
RectF layoutRect;
CharacterRange cr(0, len);
sf.SetMeasurableCharacterRanges(1, &cr);
Region r;
Status status = g->MeasureCharacterRanges(s, len, f, layoutRect, &sf, 1, &r);
if (status != Ok) {
// TODO: remove whem we figure out why we crash
if (!s) {
s = L"<null>";
}
auto s2 = str::conv::ToUtf8(s, (size_t)len);
dbglog::CrashLogF("MeasureTextAccurate: status: %d, font: %p, len: %d, s: '%s'\n", (int)status, f, len,
s2.Get());
CrashIf(status != Ok);
}
RectF bbox;
r.GetBounds(&bbox, g);
if (bbox.Width != 0)
bbox.Width += PER_STR_DX_ADJUST + (PER_CHAR_DX_ADJUST * (float)len);
return bbox;
}
// --------------------------------------------------------------
void
GFontWin32GDIPlus::GetExtent( const char * str, int inCharCount, float * outWidth,
float * outHeight, VGDevice * context ) const
{
if (!inCharCount) {
*outWidth = *outHeight = 0;
return;
}
// convert input string
DWORD count = (DWORD)mbstowcs(NULL, str, inCharCount);
WCHAR * wstr = (WCHAR*) malloc ((count + 1) * sizeof(WCHAR));
mbstowcs(wstr, str, inCharCount);
//std::string s(str);
//std::wstring wstr(s.length(),L' ');
//std::copy(s.begin(), s.end(), wstr.begin());
Graphics* gdiContext = (Graphics*) GetContext( context );
/* -- known Gdi+ issue:
We must use the following way to determine correct font extent
because typical Graphics::MeasureString() method doesn't work
properly (return values are incorrect due to antialiasing)
*/
Font* dgiFont = GetNativeFont();
// Layout rectangles used for drawing strings
RectF layoutRect_A(0.0f, 0.0f, 1300.0f, 1300.0f);
// 1 range of character positions within the string
CharacterRange charRange(0, inCharCount);
// String format used to apply to string when drawing
StringFormat strFormat;
// Set three ranges of character positions.
strFormat.SetMeasurableCharacterRanges(1, &charRange);
Region *pCharRangeRegions = new Region();
// Get the regions that correspond to the ranges within the string when
// layout rectangle A is used.
gdiContext->MeasureCharacterRanges( wstr, inCharCount, dgiFont, layoutRect_A, &strFormat, 1, pCharRangeRegions);
RectF boundRect;
pCharRangeRegions->GetBounds( &boundRect, gdiContext);
*outWidth = boundRect.Width;
*outHeight = boundRect.Height;
free (wstr);
}
// http://www.codeproject.com/KB/GDI-plus/measurestring.aspx
RectF MeasureTextAccurate(Graphics *g, Font *f, const WCHAR *s, int len)
{
if (0 == len)
return RectF(0, 0, 0, 0); // TODO: should set height to font's height
// note: frankly, I don't see a difference between those StringFormat variations
StringFormat sf(StringFormat::GenericTypographic());
sf.SetFormatFlags(sf.GetFormatFlags() | StringFormatFlagsMeasureTrailingSpaces);
//StringFormat sf(StringFormat::GenericDefault());
//StringFormat sf;
RectF layoutRect;
CharacterRange cr(0, len);
sf.SetMeasurableCharacterRanges(1, &cr);
Region r;
Status status = g->MeasureCharacterRanges(s, len, f, layoutRect, &sf, 1, &r);
CrashIf(status != Ok);
RectF bbox;
r.GetBounds(&bbox, g);
if (bbox.Width != 0)
bbox.Width += PER_STR_DX_ADJUST + (PER_CHAR_DX_ADJUST * (float)len);
return bbox;
}
// --------------------------------------------------------------
void
GFontWin32GDIPlus::GetExtent( unsigned char c, float * outWidth,
float * outHeight, VGDevice * context ) const
{
WCHAR wstr [] = L"0";
mbstowcs(wstr, (const char*)&c, 1);
Graphics* gdiContext = (Graphics*) GetContext( context );
/* -- known Gdi+ issue:
We must use the following way to determine correct font extent
because typical Graphics::MeasureString() method doesn't work
properly (return values are incorrect due to antialiasing)
*/
Font* dgiFont = GetNativeFont();
// Layout rectangles used for drawing strings
RectF layoutRect_A(0.0f, 0.0f, 1300.0f, 1300.0f);
// 1 range of character positions within the string
CharacterRange charRange(0, 1);
// String format used to apply to string when drawing
StringFormat strFormat;
// Set three ranges of character positions.
strFormat.SetMeasurableCharacterRanges(1, &charRange);
Region *pCharRangeRegions = new Region();
// Get the regions that correspond to the ranges within the string when
// layout rectangle A is used.
gdiContext->MeasureCharacterRanges( wstr, 1, dgiFont, layoutRect_A, &strFormat, 1, pCharRangeRegions);
RectF boundRect;
pCharRangeRegions->GetBounds( &boundRect, gdiContext);
*outHeight = boundRect.Height;
*outWidth = boundRect.Width;
// in some cases (when some symbols must be forced into char map), extent needs to be fixed
if (c == 139) *outWidth = 6.0;
}
