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Implemented DoDrawRotatedText() by way of a

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rotation of a alpha blended text bitmap.
    It would be better if Pango could draw
    directly into an wxImage (as FreeType)
    can, but that is for later..


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@30605 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Robert Roebling 2004-11-18 14:04:30 +00:00
parent 6408deedee
commit f1c72f0ca0
2 changed files with 22 additions and 86 deletions
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54
src/gtk/dcclient.cpp
View File

@ -1635,9 +1635,10 @@ void wxWindowDC::DoDrawRotatedText( const wxString &text, wxCoord x, wxCoord y,
wxMemoryDC dc;
dc.SelectObject(src);
dc.SetFont(GetFont());
dc.SetBackground(*wxWHITE_BRUSH);
dc.SetBackground(*wxBLACK_BRUSH);
dc.SetBrush(*wxBLACK_BRUSH);
dc.Clear();
dc.SetTextForeground( *wxWHITE );
dc.DrawText(text, 0, 0);
dc.SelectObject(wxNullBitmap);
@ -1654,54 +1655,24 @@ void wxWindowDC::DoDrawRotatedText( const wxString &text, wxCoord x, wxCoord y,
y4 = h*dx;
double x3 = x4 + x2,
y3 = y4 + y2;
// calc max and min
wxCoord maxX = (wxCoord)(dmax(x2, dmax(x3, x4)) + 0.5),
maxY = (wxCoord)(dmax(y2, dmax(y3, y4)) + 0.5),
minX = (wxCoord)(dmin(x2, dmin(x3, x4)) - 0.5),
minY = (wxCoord)(dmin(y2, dmin(y3, y4)) - 0.5);
// prepare to blit-with-rotate the bitmap to the DC
wxImage image = src.ConvertToImage();
GdkColor *colText = m_textForegroundColour.GetColor(),
*colBack = m_textBackgroundColour.GetColor();
image.ConvertColourToAlpha( m_textForegroundColour.Red(),
m_textForegroundColour.Green(),
m_textForegroundColour.Blue() );
image = image.Rotate( rad, wxPoint(0,0) );
src = image;
DoDrawBitmap( src, x /*- (int)(sin(rad)*h)*/ , y-image.GetHeight()+h, true );
bool textColSet = TRUE;
unsigned char *data = image.GetData();
// paint pixel by pixel
for ( wxCoord srcX = 0; srcX < w; srcX++ )
{
for ( wxCoord srcY = 0; srcY < h; srcY++ )
{
// transform source coords to dest coords
double r = sqrt((double)srcX*srcX + srcY*srcY);
double angleOrig = atan2((double)srcY, (double)srcX) - rad;
wxCoord dstX = (wxCoord)(r*cos(angleOrig) + 0.5),
dstY = (wxCoord)(r*sin(angleOrig) + 0.5);
// non-white pixel?
bool textPixel = data[(srcY*w + srcX)*3] != 0xff;
if ( textPixel || (m_backgroundMode == wxSOLID) )
{
// change colour if needed
if ( textPixel != textColSet )
{
gdk_gc_set_foreground( m_textGC, textPixel ? colText
: colBack );
textColSet = textPixel;
}
// don't use DrawPoint() because it uses the current pen
// colour, and we don't need it here
gdk_draw_point( m_window, m_textGC,
XLOG2DEV(x) + dstX, YLOG2DEV(y) + dstY );
}
}
}
// it would be better to draw with non underlined font and draw the line
// manually here (it would be more straight...)
@ -1714,9 +1685,6 @@ void wxWindowDC::DoDrawRotatedText( const wxString &text, wxCoord x, wxCoord y,
}
#endif // 0
// restore the font colour
gdk_gc_set_foreground( m_textGC, colText );
// update the bounding box
CalcBoundingBox(x + minX, y + minY);
CalcBoundingBox(x + maxX, y + maxY);

54
src/gtk1/dcclient.cpp
View File

@ -1635,9 +1635,10 @@ void wxWindowDC::DoDrawRotatedText( const wxString &text, wxCoord x, wxCoord y,
wxMemoryDC dc;
dc.SelectObject(src);
dc.SetFont(GetFont());
dc.SetBackground(*wxWHITE_BRUSH);
dc.SetBackground(*wxBLACK_BRUSH);
dc.SetBrush(*wxBLACK_BRUSH);
dc.Clear();
dc.SetTextForeground( *wxWHITE );
dc.DrawText(text, 0, 0);
dc.SelectObject(wxNullBitmap);
@ -1654,54 +1655,24 @@ void wxWindowDC::DoDrawRotatedText( const wxString &text, wxCoord x, wxCoord y,
y4 = h*dx;
double x3 = x4 + x2,
y3 = y4 + y2;
// calc max and min
wxCoord maxX = (wxCoord)(dmax(x2, dmax(x3, x4)) + 0.5),
maxY = (wxCoord)(dmax(y2, dmax(y3, y4)) + 0.5),
minX = (wxCoord)(dmin(x2, dmin(x3, x4)) - 0.5),
minY = (wxCoord)(dmin(y2, dmin(y3, y4)) - 0.5);
// prepare to blit-with-rotate the bitmap to the DC
wxImage image = src.ConvertToImage();
GdkColor *colText = m_textForegroundColour.GetColor(),
*colBack = m_textBackgroundColour.GetColor();
image.ConvertColourToAlpha( m_textForegroundColour.Red(),
m_textForegroundColour.Green(),
m_textForegroundColour.Blue() );
image = image.Rotate( rad, wxPoint(0,0) );
src = image;
DoDrawBitmap( src, x /*- (int)(sin(rad)*h)*/ , y-image.GetHeight()+h, true );
bool textColSet = TRUE;
unsigned char *data = image.GetData();
// paint pixel by pixel
for ( wxCoord srcX = 0; srcX < w; srcX++ )
{
for ( wxCoord srcY = 0; srcY < h; srcY++ )
{
// transform source coords to dest coords
double r = sqrt((double)srcX*srcX + srcY*srcY);
double angleOrig = atan2((double)srcY, (double)srcX) - rad;
wxCoord dstX = (wxCoord)(r*cos(angleOrig) + 0.5),
dstY = (wxCoord)(r*sin(angleOrig) + 0.5);
// non-white pixel?
bool textPixel = data[(srcY*w + srcX)*3] != 0xff;
if ( textPixel || (m_backgroundMode == wxSOLID) )
{
// change colour if needed
if ( textPixel != textColSet )
{
gdk_gc_set_foreground( m_textGC, textPixel ? colText
: colBack );
textColSet = textPixel;
}
// don't use DrawPoint() because it uses the current pen
// colour, and we don't need it here
gdk_draw_point( m_window, m_textGC,
XLOG2DEV(x) + dstX, YLOG2DEV(y) + dstY );
}
}
}
// it would be better to draw with non underlined font and draw the line
// manually here (it would be more straight...)
@ -1714,9 +1685,6 @@ void wxWindowDC::DoDrawRotatedText( const wxString &text, wxCoord x, wxCoord y,
}
#endif // 0
// restore the font colour
gdk_gc_set_foreground( m_textGC, colText );
// update the bounding box
CalcBoundingBox(x + minX, y + minY);
CalcBoundingBox(x + maxX, y + maxY);