+}
+
+void wxWindowDC::DoDrawRotatedText( const wxString &text, wxCoord x, wxCoord y,
+ double angle )
+{
+ if (angle == 0.0)
+ {
+ DrawText(text, x, y);
+ return;
+ }
+
+ wxCHECK_RET( Ok(), "invalid dc" );
+
+ WXPixel oldBackgroundPixel = -1;
+ WXPixel oldForegroundPixel = -1;
+ WXPixel foregroundPixel = -1;
+ WXPixel backgroundPixel = -1;
+
+ if (m_textBackgroundColour.Ok())
+ {
+ oldBackgroundPixel = m_backgroundPixel;
+ backgroundPixel = m_textBackgroundColour.AllocColour(m_display);
+ }
+ if (m_textForegroundColour.Ok())
+ {
+ oldForegroundPixel = m_currentColour.GetPixel();
+
+ if( m_textForegroundColour.GetPixel() <= -1 )
+ CalculatePixel( m_textForegroundColour,
+ m_textForegroundColour, true);
+
+ foregroundPixel = m_textForegroundColour.GetPixel();
+ }
+
+ // Since X draws from the baseline of the text, must add the text height
+ int cx = 0;
+ int cy = 0;
+ int ascent = 0;
+
+ if (m_font.Ok())
+ wxGetTextExtent (m_display, m_font, m_userScaleY * m_logicalScaleY,
+ text, &cx, &cy, &ascent, NULL);
+
+ wxBitmap src(cx, cy);
+ wxMemoryDC dc;
+ dc.SelectObject(src);
+ dc.SetFont(GetFont());
+ dc.SetBackground(*wxWHITE_BRUSH);
+ dc.SetBrush(*wxBLACK_BRUSH);
+ dc.Clear();
+ dc.DrawText(text, 0, 0);
+ dc.SetFont(wxNullFont);
+
+ // Calculate the size of the rotated bounding box.
+ double dx = cos(angle / 180.0 * M_PI);
+ double dy = sin(angle / 180.0 * M_PI);
+ double x4 = cy * dy;
+ double y4 = cy * dx;
+ double x3 = cx * dx;
+ double y3 = -cx * dy;
+ double x2 = x3 + x4;
+ double y2 = y3 + y4;
+ double x1 = x;
+ double y1 = y;
+
+ // Create image from the source bitmap after writing the text into it.
+ wxImage image = src.ConvertToImage();
+
+ int minx = roundmin(0, roundmin(x4, roundmin(x2, x3)));
+ int miny = roundmin(0, roundmin(y4, roundmin(y2, y3)));
+ int maxx = roundmax(0, roundmax(x4, roundmax(x2, x3)));
+ int maxy = roundmax(0, roundmax(y4, roundmax(y2, y3)));
+
+ bool lastFore = false, lastBack = false;
+
+ // This rotates counterclockwise around the top left corner.
+ for (int rx = minx; rx < maxx; rx++)
+ {
+ for (int ry = miny; ry < maxy; ry++)
+ {
+ // transform dest coords to source coords
+ int sx = (int) (rx * dx - ry * dy + 0.5);
+ int sy = - (int) (-ry * dx - rx * dy + 0.5);
+ if (sx >= 0 && sx < cx && sy >= 0 && sy < cy)
+ {
+ bool textPixel = image.GetRed(sx, sy) == 0;
+
+ if (!textPixel && m_backgroundMode != wxSOLID)
+ continue;
+
+ wxCoord ox = (wxCoord) (x1 + rx),
+ oy = (wxCoord) (y1 + ry);
+ // draw black pixels, ignore white ones (i.e. transparent b/g)
+ if (textPixel && !lastFore)
+ {
+ XSetForeground ((Display*) m_display, (GC) m_gc,
+ foregroundPixel);
+ lastFore = true;
+ lastBack = false;
+ }
+ else if (!textPixel && !lastBack)
+ {
+ XSetForeground ((Display*) m_display, (GC) m_gc,
+ backgroundPixel);
+ lastFore = false;
+ lastBack = true;
+ }
+
+ XDrawPoint ((Display*) m_display, (Pixmap) m_pixmap,
+ (GC) m_gc, XLOG2DEV (ox), YLOG2DEV (oy));
+ if (m_window && m_window->GetBackingPixmap())
+ XDrawPoint ((Display*) m_display,
+ (Pixmap) m_window->GetBackingPixmap(),
+ (GC) m_gcBacking,
+ XLOG2DEV_2 (ox), YLOG2DEV_2 (oy));
+ }
+ }
+ }
projects / wxWidgets.git / blobdiff