+ // Since X draws from the baseline of the text, must add the text height
+ int cx = 0;
+ int cy = 0;
+ int ascent = 0;
+ int slen = text.length();
+
+ if (m_font.Ok())
+ {
+ // Calculate text extent.
+ WXFontStructPtr pFontStruct =
+ m_font.GetFontStruct(m_userScaleY*m_logicalScaleY, m_display);
+ int direction, descent;
+ XCharStruct overall_return;
+#if 0
+ if (use16)
+ (void)XTextExtents16((XFontStruct*) pFontStruct,
+ (XChar2b *)(const char*) text,
+ slen, &direction,
+ &ascent, &descent, &overall_return);
+ else
+#endif // 0
+ (void)XTextExtents((XFontStruct*) pFontStruct,
+ wxConstCast(text.c_str(), char),
+ slen, &direction,
+ &ascent, &descent, &overall_return);
+
+ cx = overall_return.width;
+ cy = ascent + descent;
+ }
+
+ 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));
+ }
+ }
+ }
+
+ if (oldBackgroundPixel > -1)
+ {
+ XSetBackground ((Display*) m_display, (GC) m_gc, oldBackgroundPixel);
+ if (m_window && m_window->GetBackingPixmap())
+ XSetBackground ((Display*) m_display,(GC) m_gcBacking,
+ oldBackgroundPixel);
+ }
+ if (oldForegroundPixel > -1)
+ {
+ XSetForeground ((Display*) m_display, (GC) m_gc, oldForegroundPixel);
+ if (m_window && m_window->GetBackingPixmap())
+ XSetForeground ((Display*) m_display,(GC) m_gcBacking,
+ oldForegroundPixel);
+ }
+
+ CalcBoundingBox (minx, miny);
+ CalcBoundingBox (maxx, maxy);
+}
+
+bool wxWindowDC::CanGetTextExtent() const
+{
+ return true;
+}
+
+void wxWindowDC::DoGetTextExtent( const wxString &string, wxCoord *width, wxCoord *height,
+ wxCoord *descent, wxCoord *externalLeading,
+ wxFont *font ) const
+{
+ wxCHECK_RET( Ok(), "invalid dc" );
+
+ wxFont* theFont = font;
+ if (!theFont)
+ theFont = (wxFont *)&m_font; // const_cast
+
+ if (!theFont->Ok())
+ {
+ // TODO: this should be an error log function
+ wxFAIL_MSG("set a valid font before calling GetTextExtent!");
+
+ if (width) *width = -1;
+ if (height) *height = -1;
+ return;
+ }
+
+ WXFontStructPtr pFontStruct = theFont->GetFontStruct(m_userScaleY*m_logicalScaleY, m_display);
+
+ int direction, ascent, descent2;
+ XCharStruct overall;
+ int slen;
+
+#if 0
+ if (use16)
+ slen = str16len(string);
+ else
+#endif // 0
+ slen = strlen(string);
+
+#if 0
+ if (use16)
+ XTextExtents16((XFontStruct*) pFontStruct, (XChar2b *) (char*) (const char*) string, slen, &direction,
+ &ascent, &descent2, &overall);
+ else
+#endif // 0
+ XTextExtents((XFontStruct*) pFontStruct,
+ wxConstCast(string.c_str(), char), slen, &direction,
+ &ascent, &descent2, &overall);
+
+ if (width) *width = XDEV2LOGREL (overall.width);
+ if (height) *height = YDEV2LOGREL (ascent + descent2);
+ if (descent)
+ *descent = descent2;
+ if (externalLeading)
+ *externalLeading = 0;
+}
+
+wxCoord wxWindowDC::GetCharWidth() const
+{
+ wxCHECK_MSG( Ok(), 0, "invalid dc" );
+ wxCHECK_MSG( m_font.Ok(), 0, "invalid font" );
+
+ WXFontStructPtr pFontStruct = m_font.GetFontStruct(m_userScaleY * m_logicalScaleY, m_display);
+
+ int direction, ascent, descent;
+ XCharStruct overall;
+ XTextExtents ((XFontStruct*) pFontStruct, "x", 1, &direction, &ascent,
+ &descent, &overall);
+ return XDEV2LOGREL(overall.width);
+}
+
+wxCoord wxWindowDC::GetCharHeight() const
+{
+ wxCHECK_MSG( Ok(), 0, "invalid dc" );
+ wxCHECK_MSG( m_font.Ok(), 0, "invalid font" );
+
+ WXFontStructPtr pFontStruct = m_font.GetFontStruct(m_userScaleY*m_logicalScaleY, m_display);
+
+ int direction, ascent, descent;
+ XCharStruct overall;
+ XTextExtents ((XFontStruct*) pFontStruct, "x", 1, &direction, &ascent,
+ &descent, &overall);
+ // return XDEV2LOGREL(overall.ascent + overall.descent);
+ return XDEV2LOGREL(ascent + descent);
+}
+
+void wxWindowDC::DoGetSize( int *width, int *height ) const
+{
+ int w = 0, h = 0;
+
+ if( m_window )
+ {
+ if( m_window->GetBackingPixmap() )
+ {
+ w = m_window->GetPixmapWidth();
+ h = m_window->GetPixmapHeight();
+ }
+ else
+ m_window->GetSize( &w, &h );
+ }
+
+ if( width ) *width = w;
+ if( height ) *height = h;
+}
+
+void wxWindowDC::Clear()
+{
+ wxCHECK_RET( Ok(), "invalid dc" );
+
+ wxRect rect( GetSize() );
+ Clear( rect );
+}
+
+void wxWindowDC::Clear(const wxRect& rect)
+{
+ wxCHECK_RET( Ok(), "invalid dc" );
+
+ int x = rect.x; int y = rect.y;
+ int w = rect.width; int h = rect.height;
+
+ wxBrush saveBrush = m_brush;
+ SetBrush (m_backgroundBrush);
+
+ XFillRectangle ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc,
+ x, y, w, h);
+
+ if (m_window && m_window->GetBackingPixmap())
+ XFillRectangle ((Display*) m_display,
+ (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking,
+ x, y, w, h);
+
+ m_brush = saveBrush;
+}
projects / wxWidgets.git / blobdiff