Fix crash in wxDC::GetMultiLineTextExtent() after last commit.

[wxWidgets.git] / src / gtk / dc.cpp

diff --git a/src/gtk/dc.cpp b/src/gtk/dc.cpp
index 11b2991b4057c284018c4a3b81b9ac70cfe6b25b..791961499cb692d5dea1710dce660cf40b1bb84e 100644 (file)
--- a/src/gtk/dc.cpp
+++ b/src/gtk/dc.cpp
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        dc.cpp
+// Name:        src/gtk/dc.cpp

 // Purpose:
 // Author:      Robert Roebling
 // RCS-ID:      $Id$
 // Purpose:
 // Author:      Robert Roebling
 // RCS-ID:      $Id$


@@ -7,211 +7,403 @@
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 

-
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-    #pragma implementation "dc.h"
-#endif
-

 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 

-#include "wx/dc.h"
+#ifdef __WXGTK3__

 
 

-#include <gdk/gdk.h>
-#include <gtk/gtk.h>
+#include "wx/window.h"
+#include "wx/dcclient.h"
+#include "wx/dcmemory.h"
+#include "wx/dcscreen.h"
+#include "wx/icon.h"
+#include "wx/gtk/dc.h"

 
 

-//-----------------------------------------------------------------------------
-// constants
-//-----------------------------------------------------------------------------
+#include <gtk/gtk.h>

 
 

-#define mm2inches        0.0393700787402
-#define inches2mm        25.4
-#define mm2twips         56.6929133859
-#define twips2mm         0.0176388888889
-#define mm2pt            2.83464566929
-#define pt2mm            0.352777777778
+wxGTKCairoDCImpl::wxGTKCairoDCImpl(wxDC* owner)
+    : base_type(owner)
+{
+    m_width = 0;
+    m_height = 0;
+}

 
 

-//-----------------------------------------------------------------------------
-// wxDC
-//-----------------------------------------------------------------------------
+wxGTKCairoDCImpl::wxGTKCairoDCImpl(wxDC* owner, int)
+    : base_type(owner, 0)
+{
+    m_width = 0;
+    m_height = 0;
+}

 
 

-IMPLEMENT_ABSTRACT_CLASS(wxDC, wxDCBase)
+wxGTKCairoDCImpl::wxGTKCairoDCImpl(wxDC* owner, wxWindow* window)
+    : base_type(owner, 0)
+{
+    m_window = window;
+    m_font = window->GetFont();
+    m_textForegroundColour = window->GetForegroundColour();
+    m_textBackgroundColour = window->GetBackgroundColour();
+    m_width = 0;
+    m_height = 0;
+}

 
 

-wxDC::wxDC()
+void wxGTKCairoDCImpl::DoDrawBitmap(const wxBitmap& bitmap, int x, int y, bool useMask)

 {
 {

-    m_ok = FALSE;
+    wxCHECK_RET(IsOk(), "invalid DC");

 
 

-    m_mm_to_pix_x = (double)wxGetDisplaySize().GetWidth() /
-                    (double)wxGetDisplaySizeMM().GetWidth();
-    m_mm_to_pix_y = (double)wxGetDisplaySize().GetHeight() /
-                    (double)wxGetDisplaySizeMM().GetHeight();
+    cairo_t* cr = NULL;
+    if (m_graphicContext)
+        cr = static_cast<cairo_t*>(m_graphicContext->GetNativeContext());
+    if (cr)
+    {
+        cairo_save(cr);
+        bitmap.Draw(cr, x, y, useMask, &m_textForegroundColour, &m_textBackgroundColour);
+        cairo_restore(cr);
+    }
+}

 
 

-    m_needComputeScaleX = FALSE; /* not used yet */
-    m_needComputeScaleY = FALSE; /* not used yet */
+void wxGTKCairoDCImpl::DoDrawIcon(const wxIcon& icon, int x, int y)
+{
+    DoDrawBitmap(icon, x, y, true);
+}

 
 

-    m_logicalFunction = wxCOPY;
+#if wxUSE_IMAGE
+bool wxDoFloodFill(wxDC* dc, int x, int y, const wxColour& col, wxFloodFillStyle style);

 
 

-    m_pen = *wxBLACK_PEN;
-    m_font = *wxNORMAL_FONT;
-    m_brush = *wxWHITE_BRUSH;
+bool wxGTKCairoDCImpl::DoFloodFill(int x, int y, const wxColour& col, wxFloodFillStyle style)
+{
+    return wxDoFloodFill(GetOwner(), x, y, col, style);

 }
 }

+#endif

 
 

-void wxDC::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
+wxBitmap wxGTKCairoDCImpl::DoGetAsBitmap(const wxRect* /*subrect*/) const

 {
 {

-    m_clipping = TRUE;
-    m_clipX1 = x;
-    m_clipY1 = y;
-    m_clipX2 = x + width;
-    m_clipY2 = y + height;
+    wxFAIL_MSG("DoGetAsBitmap not implemented");
+    return wxBitmap();

 }
 
 }
 

-void wxDC::DestroyClippingRegion()
+bool wxGTKCairoDCImpl::DoGetPixel(int x, int y, wxColour* col) const

 {
 {

-    m_clipping = FALSE;
+    if (col)
+    {
+        cairo_t* cr = NULL;
+        if (m_graphicContext)
+            cr = static_cast<cairo_t*>(m_graphicContext->GetNativeContext());
+        if (cr)
+        {
+            cairo_surface_t* surface = cairo_get_target(cr);
+            x = LogicalToDeviceX(x);
+            y = LogicalToDeviceY(y);
+            GdkPixbuf* pixbuf = gdk_pixbuf_get_from_surface(surface, x, y, 1, 1);
+            if (pixbuf)
+            {
+                const guchar* src = gdk_pixbuf_get_pixels(pixbuf);
+                col->Set(src[0], src[1], src[2]);
+                g_object_unref(pixbuf);
+                return true;
+            }
+            *col = wxColour();
+        }
+    }
+    return false;

 }
 
 }
 

-// ---------------------------------------------------------------------------
-// get DC capabilities
-// ---------------------------------------------------------------------------
-
-void wxDC::DoGetSizeMM( int* width, int* height ) const
+void wxGTKCairoDCImpl::DoGetSize(int* width, int* height) const

 {
 {

-    int w = 0;
-    int h = 0;
-    GetSize( &w, &h );
-    if (width) *width = int( double(w) / (m_userScaleX*m_mm_to_pix_x) );
-    if (height) *height = int( double(h) / (m_userScaleY*m_mm_to_pix_y) );
+    if (width)
+        *width = m_width;
+    if (height)
+        *height = m_height;

 }
 
 }
 

-// Resolution in pixels per logical inch
-wxSize wxDC::GetPPI() const
+bool wxGTKCairoDCImpl::DoStretchBlit(int xdest, int ydest, int dstWidth, int dstHeight, wxDC* source, int xsrc, int ysrc, int srcWidth, int srcHeight, wxRasterOperationMode rop, bool useMask, int xsrcMask, int ysrcMask)

 {
 {

-    // TODO (should probably be pure virtual)
-    return wxSize(0, 0);
+    wxCHECK_MSG(IsOk(), false, "invalid DC");
+    wxCHECK_MSG(source && source->IsOk(), false, "invalid source DC");
+
+    cairo_t* cr = NULL;
+    if (m_graphicContext)
+        cr = static_cast<cairo_t*>(m_graphicContext->GetNativeContext());
+    cairo_t* cr_src = NULL;
+    wxGraphicsContext* gc_src = source->GetGraphicsContext();
+    if (gc_src)
+        cr_src = static_cast<cairo_t*>(gc_src->GetNativeContext());
+
+    if (cr == NULL || cr_src == NULL)
+        return false;
+
+    const int xsrc_dev = source->LogicalToDeviceX(xsrc);
+    const int ysrc_dev = source->LogicalToDeviceY(ysrc);
+
+    cairo_surface_t* surface = cairo_get_target(cr_src);
+    cairo_surface_flush(surface);
+    cairo_save(cr);
+    cairo_translate(cr, xdest, ydest);
+    cairo_rectangle(cr, 0, 0, dstWidth, dstHeight);
+    double sx, sy;
+    source->GetUserScale(&sx, &sy);
+    cairo_scale(cr, dstWidth / (sx * srcWidth), dstHeight / (sy * srcHeight));
+    cairo_set_source_surface(cr, surface, -xsrc_dev, -ysrc_dev);
+    const wxRasterOperationMode rop_save = m_logicalFunction;
+    SetLogicalFunction(rop);
+    cairo_pattern_set_filter(cairo_get_source(cr), CAIRO_FILTER_NEAREST);
+    cairo_surface_t* maskSurf = NULL;
+    if (useMask)
+    {
+        const wxBitmap& bitmap = source->GetImpl()->GetSelectedBitmap();
+        if (bitmap.IsOk())
+        {
+            wxMask* mask = bitmap.GetMask();
+            if (mask)
+                maskSurf = mask->GetBitmap();
+        }
+    }
+    if (maskSurf)
+    {
+        int xsrcMask_dev = xsrc_dev;
+        int ysrcMask_dev = ysrc_dev;
+        if (xsrcMask != -1)
+            xsrcMask_dev = source->LogicalToDeviceX(xsrcMask);
+        if (ysrcMask != -1)
+            ysrcMask_dev = source->LogicalToDeviceY(ysrcMask);
+        cairo_clip(cr);
+        cairo_mask_surface(cr, maskSurf, -xsrcMask_dev, -ysrcMask_dev);
+    }
+    else
+    {
+        cairo_fill(cr);
+    }
+    cairo_restore(cr);
+    m_logicalFunction = rop_save;
+    return true;

 }
 
 }
 

-// ---------------------------------------------------------------------------
-// set various DC parameters
-// ---------------------------------------------------------------------------
+void* wxGTKCairoDCImpl::GetCairoContext() const
+{
+    cairo_t* cr = NULL;
+    if (m_graphicContext)
+        cr = static_cast<cairo_t*>(m_graphicContext->GetNativeContext());
+    if (cr)
+        cairo_reference(cr);
+    return cr;
+}
+//-----------------------------------------------------------------------------

 
 

-void wxDC::ComputeScaleAndOrigin()
+wxWindowDCImpl::wxWindowDCImpl(wxWindowDC* owner, wxWindow* window)
+    : base_type(owner, window)

 {
 {

-    m_scaleX = m_logicalScaleX * m_userScaleX;
-    m_scaleY = m_logicalScaleY * m_userScaleY;
+    GtkWidget* widget = window->m_wxwindow;
+    if (widget == NULL)
+        widget = window->m_widget;
+    GdkWindow* gdkWindow = NULL;
+    if (widget)
+    {
+        gdkWindow = gtk_widget_get_window(widget);
+        m_ok = true;
+    }
+    if (gdkWindow)
+    {
+        cairo_t* cr = gdk_cairo_create(gdkWindow);
+        SetGraphicsContext(wxGraphicsContext::CreateFromNative(cr));
+        GtkAllocation a;
+        gtk_widget_get_allocation(widget, &a);
+        int x, y;
+        if (gtk_widget_get_has_window(widget))
+        {
+            m_width = gdk_window_get_width(gdkWindow);
+            m_height = gdk_window_get_height(gdkWindow);
+            x = m_width - a.width;
+            y = m_height - a.height;
+        }
+        else
+        {
+            m_width = a.width;
+            m_height = a.height;
+            x = a.x;
+            y = a.y;
+            cairo_rectangle(cr, a.x, a.y, a.width, a.height);
+            cairo_clip(cr);
+        }
+        if (x || y)
+            SetDeviceLocalOrigin(x, y);
+    }
+    else
+        SetGraphicsContext(wxGraphicsContext::Create());

 }
 }

+//-----------------------------------------------------------------------------

 
 

-void wxDC::SetMapMode( int mode )
+wxClientDCImpl::wxClientDCImpl(wxClientDC* owner, wxWindow* window)
+    : base_type(owner, window)

 {
 {

-    switch (mode)
+    GtkWidget* widget = window->m_wxwindow;
+    if (widget == NULL)
+        widget = window->m_widget;
+    GdkWindow* gdkWindow = NULL;
+    if (widget)

     {
     {

-        case wxMM_TWIPS:
-          SetLogicalScale( twips2mm*m_mm_to_pix_x, twips2mm*m_mm_to_pix_y );
-          break;
-        case wxMM_POINTS:
-          SetLogicalScale( pt2mm*m_mm_to_pix_x, pt2mm*m_mm_to_pix_y );
-          break;
-        case wxMM_METRIC:
-          SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
-          break;
-        case wxMM_LOMETRIC:
-          SetLogicalScale( m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0 );
-          break;
-        default:
-        case wxMM_TEXT:
-          SetLogicalScale( 1.0, 1.0 );
-          break;
+        gdkWindow = gtk_widget_get_window(widget);
+        m_ok = true;

     }
     }

-    m_mappingMode = mode;
-    
-/*  we don't do this mega optimisation
-    if (mode != wxMM_TEXT)
+    if (gdkWindow)

     {
     {

-        m_needComputeScaleX = TRUE;
-        m_needComputeScaleY = TRUE;
+        cairo_t* cr = gdk_cairo_create(gdkWindow);
+        SetGraphicsContext(wxGraphicsContext::CreateFromNative(cr));
+        if (gtk_widget_get_has_window(widget))
+        {
+            m_width = gdk_window_get_width(gdkWindow);
+            m_height = gdk_window_get_height(gdkWindow);
+        }
+        else
+        {
+            GtkAllocation a;
+            gtk_widget_get_allocation(widget, &a);
+            m_width = a.width;
+            m_height = a.height;
+            cairo_rectangle(cr, a.x, a.y, a.width, a.height);
+            cairo_clip(cr);
+            SetDeviceLocalOrigin(a.x, a.y);
+        }

     }
     }

-*/
+    else
+        SetGraphicsContext(wxGraphicsContext::Create());

 }
 }

+//-----------------------------------------------------------------------------

 
 

-void wxDC::SetUserScale( double x, double y )
+wxPaintDCImpl::wxPaintDCImpl(wxPaintDC* owner, wxWindow* window)
+    : base_type(owner, window)

 {
 {

-    // allow negative ? -> no
-    m_userScaleX = x;
-    m_userScaleY = y;
-    ComputeScaleAndOrigin();
+    cairo_t* cr = window->GTKPaintContext();
+    wxCHECK_RET(cr, "using wxPaintDC without being in a native paint event");
+    GdkWindow* gdkWindow = gtk_widget_get_window(window->m_wxwindow);
+    m_width = gdk_window_get_width(gdkWindow);
+    m_height = gdk_window_get_height(gdkWindow);
+    cairo_reference(cr);
+    SetGraphicsContext(wxGraphicsContext::CreateFromNative(cr));

 }
 }

+//-----------------------------------------------------------------------------

 
 

-void wxDC::SetLogicalScale( double x, double y )
+wxScreenDCImpl::wxScreenDCImpl(wxScreenDC* owner)
+    : base_type(owner, 0)

 {
 {

-    // allow negative ?
-    m_logicalScaleX = x;
-    m_logicalScaleY = y;
-    ComputeScaleAndOrigin();
+    GdkWindow* window = gdk_get_default_root_window();
+    m_width = gdk_window_get_width(window);
+    m_height = gdk_window_get_height(window);
+    cairo_t* cr = gdk_cairo_create(window);
+    SetGraphicsContext(wxGraphicsContext::CreateFromNative(cr));

 }
 }

+//-----------------------------------------------------------------------------

 
 

-void wxDC::SetLogicalOrigin( wxCoord x, wxCoord y )
+wxMemoryDCImpl::wxMemoryDCImpl(wxMemoryDC* owner)
+    : base_type(owner)

 {
 {

-    m_logicalOriginX = x * m_signX;   // is this still correct ?
-    m_logicalOriginY = y * m_signY;
-    ComputeScaleAndOrigin();
+    m_ok = false;

 }
 
 }
 

-void wxDC::SetDeviceOrigin( wxCoord x, wxCoord y )
+wxMemoryDCImpl::wxMemoryDCImpl(wxMemoryDC* owner, wxBitmap& bitmap)
+    : base_type(owner, 0)
+    , m_bitmap(bitmap)

 {
 {

-    // only wxPostScripDC has m_signX = -1, we override SetDeviceOrigin there
-    m_deviceOriginX = x;
-    m_deviceOriginY = y;
-    ComputeScaleAndOrigin();
+    Setup();

 }
 
 }
 

-void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
+wxMemoryDCImpl::wxMemoryDCImpl(wxMemoryDC* owner, wxDC*)
+    : base_type(owner)

 {
 {

-    // only wxPostScripDC has m_signX = -1, we override SetAxisOrientation there
-    m_signX = (xLeftRight ?  1 : -1);
-    m_signY = (yBottomUp  ? -1 :  1);
-    ComputeScaleAndOrigin();
+    m_ok = false;

 }
 
 }
 

-// ---------------------------------------------------------------------------
-// coordinates transformations
-// ---------------------------------------------------------------------------
+wxBitmap wxMemoryDCImpl::DoGetAsBitmap(const wxRect* subrect) const
+{
+    return subrect ? m_bitmap.GetSubBitmap(*subrect) : m_bitmap;
+}

 
 

-wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
+void wxMemoryDCImpl::DoSelect(const wxBitmap& bitmap)

 {
 {

-    return ((wxDC *)this)->XDEV2LOG(x);
+    m_bitmap = bitmap;
+    Setup();

 }
 
 }
 

-wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
+const wxBitmap& wxMemoryDCImpl::GetSelectedBitmap() const

 {
 {

-    return ((wxDC *)this)->YDEV2LOG(y);
+    return m_bitmap;

 }
 
 }
 

-wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
+wxBitmap& wxMemoryDCImpl::GetSelectedBitmap()

 {
 {

-    return ((wxDC *)this)->XDEV2LOGREL(x);
+    return m_bitmap;

 }
 
 }
 

-wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
+void wxMemoryDCImpl::Setup()

 {
 {

-    return ((wxDC *)this)->YDEV2LOGREL(y);
+    wxGraphicsContext* gc = NULL;
+    m_ok = m_bitmap.IsOk();
+    if (m_ok)
+    {
+        m_width = m_bitmap.GetWidth();
+        m_height = m_bitmap.GetHeight();
+        cairo_t* cr = m_bitmap.CairoCreate();
+        gc = wxGraphicsContext::CreateFromNative(cr);
+    }
+    SetGraphicsContext(gc);

 }
 }

+//-----------------------------------------------------------------------------

 
 

-wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
+wxGTKCairoDC::wxGTKCairoDC(cairo_t* cr)
+    : base_type(new wxGTKCairoDCImpl(this, 0))

 {
 {

-    return ((wxDC *)this)->XLOG2DEV(x);
+    cairo_reference(cr);
+    SetGraphicsContext(wxGraphicsContext::CreateFromNative(cr));

 }
 
 }
 

-wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
+#else
+
+#include "wx/gtk/dc.h"
+
+//-----------------------------------------------------------------------------
+// wxGTKDCImpl
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_ABSTRACT_CLASS(wxGTKDCImpl, wxDCImpl)
+
+wxGTKDCImpl::wxGTKDCImpl( wxDC *owner )
+   : wxDCImpl( owner )

 {
 {

-    return ((wxDC *)this)->YLOG2DEV(y);
+    m_ok = FALSE;
+
+    m_pen = *wxBLACK_PEN;
+    m_font = *wxNORMAL_FONT;
+    m_brush = *wxWHITE_BRUSH;

 }
 
 }
 

-wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
+wxGTKDCImpl::~wxGTKDCImpl()

 {
 {

-    return ((wxDC *)this)->XLOG2DEVREL(x);

 }
 
 }
 

-wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
+void wxGTKDCImpl::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord width, wxCoord height )

 {
 {

-    return ((wxDC *)this)->YLOG2DEVREL(y);
+    m_clipping = TRUE;
+    m_clipX1 = x;
+    m_clipY1 = y;
+    m_clipX2 = x + width;
+    m_clipY2 = y + height;

 }
 
 }
 

+// ---------------------------------------------------------------------------
+// get DC capabilities
+// ---------------------------------------------------------------------------
+
+void wxGTKDCImpl::DoGetSizeMM( int* width, int* height ) const
+{
+    int w = 0;
+    int h = 0;
+    GetOwner()->GetSize( &w, &h );
+    if (width) *width = int( double(w) / (m_userScaleX*m_mm_to_pix_x) );
+    if (height) *height = int( double(h) / (m_userScaleY*m_mm_to_pix_y) );
+}
+
+// Resolution in pixels per logical inch
+wxSize wxGTKDCImpl::GetPPI() const
+{
+    // TODO (should probably be pure virtual)
+    return wxSize(0, 0);
+}
+#endif