X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/60e193718ccf6780252740d4c6b08be1317e755e..caf6e6dee8d177844bb633786ec8c05eba6972bc:/src/msw/dc.cpp

diff --git a/src/msw/dc.cpp b/src/msw/dc.cpp
index f9deb018d6..151d32fdf4 100644
--- a/src/msw/dc.cpp
+++ b/src/msw/dc.cpp
@@ -17,10 +17,6 @@
 // headers
 // ---------------------------------------------------------------------------
 
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-    #pragma implementation "dc.h"
-#endif
-
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
@@ -135,10 +131,13 @@ static bool AlphaBlt(HDC hdcDst,
                      const wxBitmap& bmpSrc);
 
 #ifdef wxHAVE_RAW_BITMAP
-// our (limited) AlphaBlend() replacement
+
+// our (limited) AlphaBlend() replacement for Windows versions not providing it
 static void
-wxAlphaBlend(HDC hdcDst, int x, int y, int w, int h, int srcX, int srcY, const wxBitmap& bmp);
-#endif
+wxAlphaBlend(HDC hdcDst, int x, int y, int w, int h,
+             int srcX, int srcY, const wxBitmap& bmp);
+
+#endif // wxHAVE_RAW_BITMAP
 
 // ----------------------------------------------------------------------------
 // private classes
@@ -197,6 +196,37 @@ private:
     DECLARE_NO_COPY_CLASS(StretchBltModeChanger)
 };
 
+// support for dynamic loading of msimg32.dll which we use for some functions
+class wxMSImg32DLL
+{
+public:
+    // return the symbol with the given name if the DLL not loaded or symbol
+    // not present
+    static void *GetSymbol(const wxChar *name)
+    {
+        wxLogNull noLog;
+
+        if ( !ms_triedToLoad )
+        {
+            ms_triedToLoad = true;
+            ms_dll.Load(_T("msimg32"));
+        }
+
+        return ms_dll.IsLoaded() ? ms_dll.GetSymbol(name) : NULL;
+    }
+
+private:
+    static wxDynamicLibrary ms_dll;
+    static bool ms_triedToLoad;
+};
+
+wxDynamicLibrary wxMSImg32DLL::ms_dll;
+bool wxMSImg32DLL::ms_triedToLoad = false;
+
+// helper macro for getting the symbols from msimg32.dll: it supposes that a
+// type "name_t" is defined and casts the returned symbol to it automatically
+#define wxMSIMG32_SYMBOL(name) (name ## _t)wxMSImg32DLL::GetSymbol(_T(#name))
+
 // ===========================================================================
 // implementation
 // ===========================================================================
@@ -259,23 +289,6 @@ wxColourChanger::~wxColourChanger()
 // wxDC
 // ---------------------------------------------------------------------------
 
-// Default constructor
-wxDC::wxDC()
-{
-    m_canvas = NULL;
-
-    m_oldBitmap = 0;
-    m_oldPen = 0;
-    m_oldBrush = 0;
-    m_oldFont = 0;
-#if wxUSE_PALETTE
-    m_oldPalette = 0;
-#endif // wxUSE_PALETTE
-
-    m_bOwnsDC = false;
-    m_hDC = 0;
-}
-
 wxDC::~wxDC()
 {
     if ( m_hDC != 0 )
@@ -470,6 +483,14 @@ void wxDC::DestroyClippingRegion()
 
     if (m_clipping && m_hDC)
     {
+#if 1
+        // On a PocketPC device (not necessarily emulator), resetting
+        // the clip region as per the old method causes bad display
+        // problems. In fact setting a null region is probably OK
+        // on desktop WIN32 also, since the WIN32 docs imply that the user
+        // clipping region is independent from the paint clipping region.
+        ::SelectClipRgn(GetHdc(), 0);
+#else        
         // TODO: this should restore the previous clipping region,
         //       so that OnPaint processing works correctly, and the update
         //       clipping region doesn't get destroyed after the first
@@ -477,6 +498,7 @@ void wxDC::DestroyClippingRegion()
         HRGN rgn = CreateRectRgn(0, 0, 32000, 32000);
         ::SelectClipRgn(GetHdc(), rgn);
         ::DeleteObject(rgn);
+#endif        
     }
 
     wxDCBase::DestroyClippingRegion();
@@ -1761,7 +1783,7 @@ bool wxDC::DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) con
     static int maxWidth = -1;
     int fit = 0;
     SIZE sz = {0,0};
-    int stlen = text.Length();
+    int stlen = text.length();
 
     if (maxLenText == -1)
     {
@@ -2286,12 +2308,14 @@ bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
     return success;
 }
 
-void wxDC::DoGetSize(int *w, int *h) const
+void wxDC::GetDeviceSize(int *width, int *height) const
 {
     WXMICROWIN_CHECK_HDC
 
-    if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZRES);
-    if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTRES);
+    if ( width )
+        *width = ::GetDeviceCaps(GetHdc(), HORZRES);
+    if ( height )
+        *height = ::GetDeviceCaps(GetHdc(), VERTRES);
 }
 
 void wxDC::DoGetSizeMM(int *w, int *h) const
@@ -2499,32 +2523,7 @@ static bool AlphaBlt(HDC hdcDst,
                                         HDC,int,int,int,int,
                                         BLENDFUNCTION);
 
-    // bitmaps can be drawn only from GUI thread so there is no need to
-    // protect this static variable from multiple threads
-    static bool s_triedToLoad = false;
-    static AlphaBlend_t pfnAlphaBlend = NULL;
-    if ( !s_triedToLoad )
-    {
-        s_triedToLoad = true;
-
-        // don't give errors about the DLL being unavailable, we're
-        // prepared to handle this
-        wxLogNull nolog;
-
-        wxDynamicLibrary dll(_T("msimg32.dll"));
-        if ( dll.IsLoaded() )
-        {
-            pfnAlphaBlend = (AlphaBlend_t)dll.GetSymbol(_T("AlphaBlend"));
-            if ( pfnAlphaBlend )
-            {
-                // we must keep the DLL loaded if we want to be able to
-                // call AlphaBlend() so just never unload it at all, not a
-                // big deal
-                dll.Detach();
-            }
-        }
-    }
-
+    static AlphaBlend_t pfnAlphaBlend = wxMSIMG32_SYMBOL(AlphaBlend);
     if ( pfnAlphaBlend )
     {
         BLENDFUNCTION bf;
@@ -2543,6 +2542,8 @@ static bool AlphaBlt(HDC hdcDst,
 
         wxLogLastError(_T("AlphaBlend"));
     }
+#else
+    wxUnusedVar(hdcSrc);
 #endif // defined(AC_SRC_OVER)
 
     // AlphaBlend() unavailable of failed: use our own (probably much slower)
@@ -2564,14 +2565,16 @@ static bool AlphaBlt(HDC hdcDst,
 #ifdef wxHAVE_RAW_BITMAP
 
 static void
-wxAlphaBlend(HDC hdcDst, int xDst, int yDst, int w, int h, int srcX, int srcY, const wxBitmap& bmpSrc)
+wxAlphaBlend(HDC hdcDst, int xDst, int yDst,
+             int w, int h,
+             int srcX, int srcY, const wxBitmap& bmpSrc)
 {
     // get the destination DC pixels
     wxBitmap bmpDst(w, h, 32 /* force creating RGBA DIB */);
     MemoryHDC hdcMem;
     SelectInHDC select(hdcMem, GetHbitmapOf(bmpDst));
 
-    if ( !::BitBlt(hdcMem, 0, 0, w, h, hdcDst, 0, 0, SRCCOPY) )
+    if ( !::BitBlt(hdcMem, 0, 0, w, h, hdcDst, xDst, yDst, SRCCOPY) )
     {
         wxLogLastError(_T("BitBlt"));
     }
@@ -2621,3 +2624,68 @@ wxAlphaBlend(HDC hdcDst, int xDst, int yDst, int w, int h, int srcX, int srcY, c
 }
 
 #endif // #ifdef wxHAVE_RAW_BITMAP
+
+void wxDC::DoGradientFillLinear (const wxRect& rect,
+                                 const wxColour& initialColour,
+                                 const wxColour& destColour,
+                                 wxDirection nDirection)
+{
+    // use native function if we have compile-time support it and can load it
+    // during run-time (linking to it statically would make the program
+    // unusable on earlier Windows versions)
+#if defined(GRADIENT_FILL_RECT_H) && wxUSE_DYNLIB_CLASS
+    typedef BOOL
+        (WINAPI *GradientFill_t)(HDC, PTRIVERTEX, ULONG, PVOID, ULONG, ULONG);
+    static GradientFill_t pfnGradientFill = wxMSIMG32_SYMBOL(GradientFill);
+
+    if ( pfnGradientFill )
+    {
+        GRADIENT_RECT grect;
+        grect.UpperLeft = 0;
+        grect.LowerRight = 1;
+
+        // invert colours direction if not filling from left-to-right or
+        // top-to-bottom
+        int firstVertex = nDirection == wxNORTH || nDirection == wxWEST ? 1 : 0;
+
+        // one vertex for upper left and one for upper-right
+        TRIVERTEX vertices[2];
+
+        vertices[0].x = rect.GetLeft();
+        vertices[0].y = rect.GetTop();
+        vertices[1].x = rect.GetRight();
+        vertices[1].y = rect.GetBottom();
+
+        vertices[firstVertex].Red = (COLOR16)(initialColour.Red() << 8);
+        vertices[firstVertex].Green = (COLOR16)(initialColour.Green() << 8);
+        vertices[firstVertex].Blue = (COLOR16)(initialColour.Blue() << 8);
+        vertices[firstVertex].Alpha = 0;
+        vertices[1 - firstVertex].Red = (COLOR16)(destColour.Red() << 8);
+        vertices[1 - firstVertex].Green = (COLOR16)(destColour.Green() << 8);
+        vertices[1 - firstVertex].Blue = (COLOR16)(destColour.Blue() << 8);
+        vertices[1 - firstVertex].Alpha = 0;
+
+        if (nDirection == wxWEST ||
+            nDirection == wxEAST)
+        if ( (*pfnGradientFill)
+             (
+                GetHdc(),
+                vertices,
+                WXSIZEOF(vertices),
+                &grect,
+                1,
+                nDirection == wxWEST || nDirection == wxEAST
+                    ? GRADIENT_FILL_RECT_H
+                    : GRADIENT_FILL_RECT_V
+             ) )
+        {
+            // skip call of the base class version below
+            return;
+        }
+
+        wxLogLastError(_T("GradientFill"));
+    }
+#endif // wxUSE_DYNLIB_CLASS
+
+    wxDCBase::DoGradientFillLinear(rect, initialColour, destColour, nDirection);
+}