preserve type when loaded image is rescaled, #11543

[wxWidgets.git] / src / msw / palette.cpp

diff --git a/src/msw/palette.cpp b/src/msw/palette.cpp
index dc9dfabf86fdb4c9fe197c705ffdfc659eb207a1..a9c9fc8056ea2c5b25976f4cb294369df053bf42 100644 (file)
--- a/src/msw/palette.cpp
+++ b/src/msw/palette.cpp
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        palette.cpp
+// Name:        src/msw/palette.cpp
 // Purpose:     wxPalette
 // Author:      Julian Smart
 // Modified by:
@@ -18,130 +18,172 @@
 
 #if wxUSE_PALETTE
 
-#ifndef WX_PRECOMP
-    #include "wx/palette.h"
-#endif
+#include "wx/palette.h"
 
 #include "wx/msw/private.h"
 
+// ============================================================================
+// wxPaletteRefData
+// ============================================================================
+
+class WXDLLEXPORT wxPaletteRefData: public wxGDIRefData
+{
+public:
+    wxPaletteRefData() { Init(); }
+
+    wxPaletteRefData(int n,
+                     unsigned char *red,
+                     unsigned char *green,
+                     unsigned char *blue)
+    {
+        Init();
+
+        LOGPALETTE *pPal = Alloc(n);
+        if ( !pPal )
+            return;
+
+        for ( int i = 0; i < n; i++ )
+        {
+            pPal->palPalEntry[i].peRed = red[i];
+            pPal->palPalEntry[i].peGreen = green[i];
+            pPal->palPalEntry[i].peBlue = blue[i];
+            pPal->palPalEntry[i].peFlags = 0;
+        }
+
+        m_hPalette = ::CreatePalette(pPal);
+        free(pPal);
+    }
+
+    wxPaletteRefData(const wxPaletteRefData& data)
+        : wxGDIRefData()
+    {
+        Init();
+
+        const UINT n = data.GetEntries();
+        if ( !n )
+            return;
+
+        LOGPALETTE *pPal = Alloc(n);
+        if ( !pPal )
+            return;
+
+        if ( ::GetPaletteEntries(data.m_hPalette, 0, n, pPal->palPalEntry) )
+            m_hPalette = ::CreatePalette(pPal);
+
+        free(pPal);
+    }
+
+    virtual ~wxPaletteRefData()
+    {
+        if ( m_hPalette )
+            ::DeleteObject(m_hPalette);
+    }
+
+    virtual bool IsOk() const { return m_hPalette != 0; }
+
+    UINT GetEntries() const
+    {
+        return ::GetPaletteEntries(m_hPalette, 0, 0, NULL);
+    }
+
+private:
+    // caller must free() the pointer
+    static LOGPALETTE *Alloc(UINT numEntries)
+    {
+        LOGPALETTE *pPal = (LOGPALETTE *)
+            malloc(sizeof(LOGPALETTE) + numEntries*sizeof(PALETTEENTRY));
+        if ( pPal )
+        {
+            pPal->palVersion = 0x300;
+            pPal->palNumEntries = numEntries;
+        }
+
+        return pPal;
+    }
+
+    void Init() { m_hPalette = 0; }
+
+    HPALETTE m_hPalette;
+
+    friend class WXDLLIMPEXP_FWD_CORE wxPalette;
+};
+
+// ============================================================================
+// wxPalette
+// ============================================================================
+
 IMPLEMENT_DYNAMIC_CLASS(wxPalette, wxGDIObject)
 
-/*
- * Palette
- *
- */
+#define M_PALETTEDATA ((wxPaletteRefData *)m_refData)
 
-wxPaletteRefData::wxPaletteRefData(void)
+bool wxPalette::Create(int n,
+                       unsigned char *red,
+                       unsigned char *green,
+                       unsigned char *blue)
 {
-  m_hPalette = 0;
-}
+    m_refData = new wxPaletteRefData(n, red, green, blue);
 
-wxPaletteRefData::~wxPaletteRefData(void)
-{
-    if ( m_hPalette )
-        ::DeleteObject((HPALETTE) m_hPalette);
+    return IsOk();
 }
 
-wxPalette::wxPalette(void)
+wxGDIRefData *wxPalette::CreateGDIRefData() const
 {
+    return new wxPaletteRefData;
 }
 
-wxPalette::wxPalette(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
+wxGDIRefData *wxPalette::CloneGDIRefData(const wxGDIRefData *data) const
 {
-  Create(n, red, green, blue);
+    return new wxPaletteRefData(*static_cast<const wxPaletteRefData *>(data));
 }
 
-wxPalette::~wxPalette(void)
+int wxPalette::GetColoursCount() const
 {
-//    FreeResource(true);
+    return IsOk() ? M_PALETTEDATA->GetEntries() : 0;
 }
 
-bool wxPalette::FreeResource(bool WXUNUSED(force))
+int wxPalette::GetPixel(unsigned char red,
+                        unsigned char green,
+                        unsigned char blue) const
 {
-    if ( M_PALETTEDATA && M_PALETTEDATA->m_hPalette)
-    {
-      DeleteObject((HPALETTE)M_PALETTEDATA->m_hPalette);
-    }
-    return true;
+    if ( !m_refData )
+        return wxNOT_FOUND;
+
+    return ::GetNearestPaletteIndex(M_PALETTEDATA->m_hPalette,
+                                    PALETTERGB(red, green, blue));
 }
 
-bool wxPalette::Create(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
+bool wxPalette::GetRGB(int index,
+                       unsigned char *red,
+                       unsigned char *green,
+                       unsigned char *blue) const
 {
-  UnRef();
-
-#if defined(__WXMICROWIN__)
-
-  return false;
-
-#else
-
-  m_refData = new wxPaletteRefData;
-
-  NPLOGPALETTE npPal = (NPLOGPALETTE)LocalAlloc(LMEM_FIXED, sizeof(LOGPALETTE) +
-                        (WORD)n * sizeof(PALETTEENTRY));
-  if (!npPal)
-    return false;
-
-  npPal->palVersion = 0x300;
-  npPal->palNumEntries = (WORD)n;
+    if ( !m_refData )
+        return false;
 
-  int i;
-  for (i = 0; i < n; i ++)
-  {
-    npPal->palPalEntry[i].peRed = red[i];
-    npPal->palPalEntry[i].peGreen = green[i];
-    npPal->palPalEntry[i].peBlue = blue[i];
-    npPal->palPalEntry[i].peFlags = 0;
-  }
-  M_PALETTEDATA->m_hPalette = (WXHPALETTE) CreatePalette((LPLOGPALETTE)npPal);
-  LocalFree((HANDLE)npPal);
-  return true;
+    if (index < 0 || index > 255)
+        return false;
 
-#endif
-}
+    PALETTEENTRY entry;
+    if ( !::GetPaletteEntries(M_PALETTEDATA->m_hPalette, index, 1, &entry) )
+        return false;
 
-int wxPalette::GetPixel(const unsigned char red, const unsigned char green, const unsigned char blue) const
-{
-#ifdef __WXMICROWIN__
-  return 0;
-#else
-  if ( !m_refData )
-    return 0;
+    *red = entry.peRed;
+    *green = entry.peGreen;
+    *blue = entry.peBlue;
 
-  return ::GetNearestPaletteIndex((HPALETTE) M_PALETTEDATA->m_hPalette, PALETTERGB(red, green, blue));
-#endif
+    return true;
 }
 
-bool wxPalette::GetRGB(int index, unsigned char *red, unsigned char *green, unsigned char *blue) const
+WXHPALETTE wxPalette::GetHPALETTE() const
 {
-#ifdef __WXMICROWIN__
-  return false;
-#else
-  if ( !m_refData )
-    return false;
-
-  if (index < 0 || index > 255)
-         return false;
-
-  PALETTEENTRY entry;
-  if (::GetPaletteEntries((HPALETTE) M_PALETTEDATA->m_hPalette, index, 1, &entry))
-  {
-         *red = entry.peRed;
-         *green = entry.peGreen;
-         *blue = entry.peBlue;
-         return true;
-  } else
-         return false;
-#endif
+    return M_PALETTEDATA ? (WXHPALETTE)M_PALETTEDATA->m_hPalette : 0;
 }
 
 void wxPalette::SetHPALETTE(WXHPALETTE pal)
 {
-    if ( !m_refData )
-        m_refData = new wxPaletteRefData;
+    AllocExclusive();
 
-    M_PALETTEDATA->m_hPalette = pal;
+    M_PALETTEDATA->m_hPalette = (HPALETTE)pal;
 }
 
 #endif // wxUSE_PALETTE
-