X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/0db8a70e0c72a9de720b13f76f9e53ec0e9a11fd..0518029cecf127dc5e792bb3fcd6781d46c0e0b1:/src/generic/graphicc.cpp

diff --git a/src/generic/graphicc.cpp b/src/generic/graphicc.cpp
index 87b4360a66..f40b1c5845 100755
--- a/src/generic/graphicc.cpp
+++ b/src/generic/graphicc.cpp
@@ -37,6 +37,7 @@
 #endif
 
 #include "wx/graphics.h"
+#include "wx/rawbmp.h"
 
 #if wxUSE_GRAPHICS_CONTEXT
 
@@ -186,6 +187,10 @@ public :
     virtual void Set(wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0, 
         wxDouble tx=0.0, wxDouble ty=0.0);
 
+    // gets the component valuess of the matrix
+    virtual void Get(wxDouble* a=NULL, wxDouble* b=NULL,  wxDouble* c=NULL,
+                     wxDouble* d=NULL, wxDouble* tx=NULL, wxDouble* ty=NULL) const;
+       
     // makes this the inverse matrix
     virtual void Invert();
 
@@ -753,7 +758,9 @@ void wxCairoPathData::AddLineToPoint( wxDouble x , wxDouble y )
 
 void wxCairoPathData::AddPath( const wxGraphicsPathData* path )
 {
-    // TODO
+    cairo_path_t* p = (cairo_path_t*)path->GetNativePath();
+    cairo_append_path(m_pathContext, p);
+    UnGetNativePath(p);
 }
 
 void wxCairoPathData::CloseSubpath()
@@ -866,6 +873,18 @@ void wxCairoMatrixData::Set(wxDouble a, wxDouble b, wxDouble c, wxDouble d,
     cairo_matrix_init( &m_matrix, a, b, c, d, tx, ty);
 }
 
+// gets the component valuess of the matrix
+void wxCairoMatrixData::Get(wxDouble* a, wxDouble* b,  wxDouble* c,
+                            wxDouble* d, wxDouble* tx, wxDouble* ty) const
+{
+    if (a)  *a = m_matrix.xx;
+    if (b)  *b = m_matrix.yx;
+    if (c)  *c = m_matrix.xy;
+    if (d)  *d = m_matrix.yy;
+    if (tx) *tx= m_matrix.x0;
+    if (ty) *ty= m_matrix.y0;
+}
+
 // makes this the inverse matrix
 void wxCairoMatrixData::Invert() 
 {
@@ -1012,19 +1031,44 @@ wxCairoContext::~wxCairoContext()
 }
 
 
-void wxCairoContext::Clip( const wxRegion & WXUNUSED(region) )
+void wxCairoContext::Clip( const wxRegion& region )
 {
-// TODO
+    // Create a path with all the rectangles in the region
+    wxGraphicsPath path = GetRenderer()->CreatePath();
+    wxRegionIterator ri(region);
+    while (ri)
+    {
+        path.AddRectangle(ri.GetX(), ri.GetY(), ri.GetW(), ri.GetH());
+        ri++;
+    }
+    
+    // Put it in the context
+    cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
+    cairo_append_path(m_context, cp);
+
+    // clip to that path
+    cairo_clip(m_context);
+    path.UnGetNativePath(cp);  
 }
 
 void wxCairoContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 {
-// TODO
+    // Create a path with this rectangle
+    wxGraphicsPath path = GetRenderer()->CreatePath();
+    path.AddRectangle(x,y,w,h);
+
+    // Put it in the context
+    cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
+    cairo_append_path(m_context, cp);
+
+    // clip to that path
+    cairo_clip(m_context);
+    path.UnGetNativePath(cp);  
 }
 
 void wxCairoContext::ResetClip()
 {
-// TODO
+    cairo_reset_clip(m_context);
 }
 
 
@@ -1102,37 +1146,156 @@ void wxCairoContext::PopState()
 
 void wxCairoContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 {
-    /*
-        Bitmap* image = Bitmap::FromHBITMAP((HBITMAP)bmp.GetHBITMAP(),(HPALETTE)bmp.GetPalette()->GetHPALETTE());
-        m_context->DrawImage(image,(REAL) x,(REAL) y,(REAL) w,(REAL) h) ;
-        delete image ;
-    */
+    wxCHECK_RET( bmp.IsOk(), wxT("Invalid bitmap in wxCairoContext::DrawBitmap"));
+
+    cairo_surface_t* surface;
+    int bw = bmp.GetWidth();
+    int bh = bmp.GetHeight();
+    wxBitmap bmpSource = bmp;  // we need a non-const instance
+    unsigned char* buffer = new unsigned char[bw*bh*4];
+    wxUint32* data = (wxUint32*)buffer;
+    
+    // Create a surface object and copy the bitmap pixel data to it.  if the
+    // image has alpha (or a mask represented as alpha) then we'll use a
+    // different format and iterator than if it doesn't...
+    if (bmpSource.HasAlpha() || bmpSource.GetMask())
+    {
+        surface = cairo_image_surface_create_for_data(
+            buffer, CAIRO_FORMAT_ARGB32, bw, bh, bw*4);
+        wxAlphaPixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh));
+        wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
+        
+        wxAlphaPixelData::Iterator p(pixData);
+        for (int y=0; y<bh; y++)
+        {
+            wxAlphaPixelData::Iterator rowStart = p;
+            for (int x=0; x<bw; x++)
+            {
+                // Each pixel in CAIRO_FORMAT_ARGB32 is a 32-bit quantity,
+                // with alpha in the upper 8 bits, then red, then green, then
+                // blue. The 32-bit quantities are stored native-endian.
+                // Pre-multiplied alpha is used.
+                unsigned char alpha = p.Alpha();
+                if (alpha == 0)
+                    *data = 0;
+                else
+                    *data = ( alpha                      << 24 
+                              | (p.Red() * alpha/255)    << 16 
+                              | (p.Green() * alpha/255)  <<  8 
+                              | (p.Blue() * alpha/255) );
+                ++data;
+                ++p;
+            }
+            p = rowStart;
+            p.OffsetY(pixData, 1);
+        }        
+    }
+    else  // no alpha
+    {
+        surface = cairo_image_surface_create_for_data(
+            buffer, CAIRO_FORMAT_RGB24, bw, bh, bw*4);
+        wxNativePixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh));
+        wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
+        
+        wxNativePixelData::Iterator p(pixData);
+        for (int y=0; y<bh; y++)
+        {
+            wxNativePixelData::Iterator rowStart = p;
+            for (int x=0; x<bw; x++)
+            {
+                // Each pixel in CAIRO_FORMAT_RGB24 is a 32-bit quantity, with
+                // the upper 8 bits unused. Red, Green, and Blue are stored in
+                // the remaining 24 bits in that order.  The 32-bit quantities
+                // are stored native-endian.
+                *data = ( p.Red() << 16 | p.Green() << 8 | p.Blue() );
+                ++data;
+                ++p;
+            }
+            p = rowStart;
+            p.OffsetY(pixData, 1);
+        }        
+    }
+
+    
+    PushState();
+    
+    // In case we're scaling the image by using a width and height different
+    // than the bitmap's size create a pattern transformation on the surface and
+    // draw the transformed pattern.
+    cairo_pattern_t* pattern = cairo_pattern_create_for_surface(surface);
+    wxDouble scaleX = w / bw;
+    wxDouble scaleY = h / bh;
+    cairo_scale(m_context, scaleX, scaleY);
+
+    // prepare to draw the image
+    cairo_translate(m_context, x, y);
+    cairo_set_source(m_context, pattern);
+    // use the original size here since the context is scaled already...
+    cairo_rectangle(m_context, 0, 0, bw, bh);
+    // fill the rectangle using the pattern
+    cairo_fill(m_context);
+
+    // clean up
+    cairo_pattern_destroy(pattern);
+    cairo_surface_destroy(surface);
+    delete [] buffer;
+    PopState();
 }
 
 void wxCairoContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 {
-    /*
-        Bitmap* image = Bitmap::FromHICON((HICON)icon.GetHICON());
-        m_context->DrawImage(image,(REAL) x,(REAL) y,(REAL) w,(REAL) h) ;
-        delete image ;
-    */
+    // An icon is a bitmap on wxGTK, so do this the easy way.  When we want to
+    // start using the Cairo backend on other platforms then we may need to
+    // fiddle with this...
+    DrawBitmap(icon, x, y, w, h);
 }
 
 
 void wxCairoContext::DrawText( const wxString &str, wxDouble x, wxDouble y )
 {
-    if ( m_font.IsNull() || str.IsEmpty())
-        return ;
-    cairo_move_to(m_context,x,y);
-    const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
+    if ( m_font.IsNull() || str.empty())
+        return;
+    
     ((wxCairoFontData*)m_font.GetRefData())->Apply(this);
+
+    // Cairo's x,y for drawing text is at the baseline, so we need to adjust
+    // the position we move to by the ascent.
+    cairo_font_extents_t fe;
+    cairo_font_extents(m_context, &fe);
+    cairo_move_to(m_context, x, y+fe.ascent);
+    
+    const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
     cairo_show_text(m_context,buf);
 }
 
 void wxCairoContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
                                     wxDouble *descent, wxDouble *externalLeading ) const
 {
-    // TODO
+    if ( m_font.IsNull() || str.empty())
+        return;
+
+    ((wxCairoFontData*)m_font.GetRefData())->Apply((wxCairoContext*)this);
+
+    if (width)
+    {
+        const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
+        cairo_text_extents_t te;
+        cairo_text_extents(m_context, buf, &te);
+        *width = te.width;
+    }
+
+    if (height || descent || externalLeading)
+    {
+        cairo_font_extents_t fe;
+        cairo_font_extents(m_context, &fe);
+    
+        if (height)
+            *height = fe.height;
+        if ( descent )
+            *descent = fe.descent;
+        if ( externalLeading )
+            *externalLeading = wxMax(0, fe.height - (fe.ascent + fe.descent));
+    }
 }
 
 void wxCairoContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
@@ -1166,12 +1329,18 @@ public :
 
     virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc);
 
+#ifdef __WXMSW__
+    virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc);
+#endif
+
     virtual wxGraphicsContext * CreateContextFromNativeContext( void * context );
 
     virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window );
 
     virtual wxGraphicsContext * CreateContext( wxWindow* window );
 
+    virtual wxGraphicsContext * CreateMeasuringContext();
+
     // Path
 
     virtual wxGraphicsPath CreatePath();
@@ -1222,6 +1391,13 @@ wxGraphicsContext * wxCairoRenderer::CreateContext( const wxWindowDC& dc)
     return new wxCairoContext(this,dc);
 }
 
+#ifdef __WXMSW__
+wxGraphicsContext * wxCairoRenderer::CreateContext( const wxMemoryDC& dc)
+{
+    return NULL;
+}
+#endif
+
 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeContext( void * context )
 {
     return new wxCairoContext(this,(cairo_t*)context);
@@ -1237,6 +1413,12 @@ wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeWindow( void * windo
 #endif
 }
 
+wxGraphicsContext * wxCairoRenderer::CreateMeasuringContext()
+{
+    return NULL;
+    // TODO
+}
+
 wxGraphicsContext * wxCairoRenderer::CreateContext( wxWindow* window )
 {
     return new wxCairoContext(this, window );