X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/d694de12e7cbb45531c4f67fc4c29af0e45c6238..8a094d7ba9913333b49f8561d97b8309d0023663:/src/gtk/bitmap.cpp

diff --git a/src/gtk/bitmap.cpp b/src/gtk/bitmap.cpp
index a7e059c40c..38a044b1aa 100644
--- a/src/gtk/bitmap.cpp
+++ b/src/gtk/bitmap.cpp
@@ -7,10 +7,13 @@
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
 #pragma implementation "bitmap.h"
 #endif
 
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
 #include "wx/defs.h"
 
 #include "wx/palette.h"
@@ -36,6 +39,8 @@
     #include <gdk/gdkrgb.h>
 #endif // GTK+ 2.0/1.2
 
+#include <math.h>
+
 extern void gdk_wx_draw_bitmap     (GdkDrawable  *drawable,
                           GdkGC               *gc,
                           GdkDrawable  *src,
@@ -254,10 +259,12 @@ wxBitmapRefData::wxBitmapRefData()
 
 wxBitmapRefData::~wxBitmapRefData()
 {
-    if (m_pixmap) gdk_pixmap_unref( m_pixmap );
-    if (m_bitmap) gdk_bitmap_unref( m_bitmap );
-    if (m_mask) delete m_mask;
-    if (m_palette) delete m_palette;
+    if (m_pixmap)
+        gdk_pixmap_unref( m_pixmap );
+    if (m_bitmap)
+        gdk_bitmap_unref( m_bitmap );
+    delete m_mask;
+    delete m_palette;
 }
 
 //-----------------------------------------------------------------------------
@@ -279,14 +286,18 @@ bool wxBitmap::Create( int width, int height, int depth )
 {
     UnRef();
 
-    wxCHECK_MSG( (width > 0) && (height > 0), FALSE, wxT("invalid bitmap size") )
+    if ( width <= 0 || height <= 0 )
+    {
+        return false;
+    }
 
     GdkVisual *visual = wxTheApp->GetGdkVisual();
 
-    if (depth == -1) depth = visual->depth;
+    if (depth == -1)
+        depth = visual->depth;
 
-    wxCHECK_MSG( (depth == visual->depth) ||
-                 (depth == 1), FALSE, wxT("invalid bitmap depth") )
+    wxCHECK_MSG( (depth == visual->depth) || (depth == 1), FALSE,
+                    wxT("invalid bitmap depth") )
 
     m_refData = new wxBitmapRefData();
     M_BMPDATA->m_mask = (wxMask *) NULL;
@@ -335,6 +346,187 @@ bool wxBitmap::CreateFromXpm( const char **bits )
     return TRUE;
 }
 
+wxBitmap wxBitmap::Rescale( int clipx, int clipy, int clipwidth, int clipheight, int newx, int newy )
+{
+    wxCHECK_MSG( Ok(), wxNullBitmap, wxT("invalid bitmap") );
+
+    if (newy==M_BMPDATA->m_width && newy==M_BMPDATA->m_height)
+        return *this;
+        
+    GdkImage *img = (GdkImage*) NULL;
+    if (GetPixmap())
+        img = gdk_image_get( GetPixmap(), 0, 0, GetWidth(), GetHeight() );
+    else if (GetBitmap())
+        img = gdk_image_get( GetBitmap(), 0, 0, GetWidth(), GetHeight() );
+    else
+        wxFAIL_MSG( wxT("Ill-formed bitmap") );
+
+    wxCHECK_MSG( img, wxNullBitmap, wxT("couldn't create image") );
+
+    wxBitmap bmp;
+    int bpp = -1;
+
+    int width = wxMax(newx, 1);
+    int height = wxMax(newy, 1);
+    width = wxMin(width, clipwidth);
+    height = wxMin(height, clipheight);
+    
+    GdkGC *gc = NULL;
+    GdkPixmap *dstpix = NULL;
+    if (GetPixmap())
+    {
+        GdkVisual *visual = gdk_window_get_visual( GetPixmap() );
+        if (visual == NULL)
+            visual = wxTheApp->GetGdkVisual();
+
+        bpp = visual->depth;
+        bmp = wxBitmap(width,height,bpp);
+        dstpix = bmp.GetPixmap();
+        gc = gdk_gc_new( dstpix );
+    }
+
+    char *dst = NULL;
+    long dstbyteperline = 0;
+    
+    if (GetBitmap())
+    {
+        bpp = 1;
+        dstbyteperline = width/8*M_BMPDATA->m_bpp;
+        if (width*M_BMPDATA->m_bpp % 8 != 0)
+            dstbyteperline++;
+        dst = (char*) malloc(dstbyteperline*height);
+    }
+             
+    // be careful to use the right scaling factor
+    float scx = (float)M_BMPDATA->m_width/(float)newx;
+    float scy = (float)M_BMPDATA->m_height/(float)newy;
+    // prepare accel-tables
+    int *tablex = (int *)calloc(width,sizeof(int));
+    int *tabley = (int *)calloc(height,sizeof(int));
+
+    // accel table filled with clipped values
+    for (int x = 0; x < width; x++)
+        tablex[x] = (int) (scx * (x+clipx));
+    for (int y = 0; y < height; y++)
+        tabley[y] = (int) (scy * (y+clipy));
+
+    // Main rescaling routine starts here
+    for (int h = 0; h < height; h++)
+    {
+        char outbyte = 0;
+        int old_x = -1;
+        guint32 old_pixval;
+
+        for (int w = 0; w < width; w++)
+        {
+            guint32 pixval;
+            int x = tablex[w];
+            if (x == old_x)
+                pixval = old_pixval;
+            else
+            {
+                pixval = gdk_image_get_pixel( img, x, tabley[h] );
+                old_pixval = pixval;
+                old_x = x;
+            }
+                
+            if (bpp == 1)
+            {
+                if (!pixval)
+                {
+                    char bit=1;
+                    char shift = bit << w % 8;
+                    outbyte |= shift;
+                }
+                
+                if ((w+1)%8==0)
+                {
+                    dst[h*dstbyteperline+w/8] = outbyte;
+                    outbyte = 0;
+                }
+            }
+            else
+            {
+                GdkColor col;
+                col.pixel = pixval;
+                gdk_gc_set_foreground( gc, &col );
+                gdk_draw_point( dstpix, gc, w, h);
+            }
+        }
+    
+        // do not forget the last byte
+        if ((bpp == 1) && (width % 8 != 0))
+            dst[h*dstbyteperline+width/8] = outbyte;
+    }
+    
+    gdk_image_destroy( img );
+    if (gc) gdk_gc_unref( gc );
+
+    if (bpp == 1)
+    {
+        bmp = wxBitmap( (const char *)dst, width, height, 1 );
+        free( dst );
+    }
+    
+    if (GetMask())
+    {
+        dstbyteperline = width/8;
+        if (width % 8 != 0)
+            dstbyteperline++;
+        dst = (char*) malloc(dstbyteperline*height);
+        img = gdk_image_get( GetMask()->GetBitmap(), 0, 0, GetWidth(), GetHeight() );
+
+        for (int h = 0; h < height; h++)
+        {
+            char outbyte = 0;
+            int old_x = -1;
+            guint32 old_pixval;
+    
+            for (int w = 0; w < width; w++)
+            {
+                guint32 pixval;
+                int x = tablex[w];
+                if (x == old_x)
+                    pixval = old_pixval;
+                else
+                {
+                    pixval = gdk_image_get_pixel( img, x, tabley[h] );
+                    old_pixval = pixval;
+                    old_x = x;
+                }
+                
+                if (pixval)
+                {
+                    char bit=1;
+                    char shift = bit << w % 8;
+                    outbyte |= shift;
+                }
+                
+                if ((w+1)%8 == 0)
+                {
+                    dst[h*dstbyteperline+w/8] = outbyte;
+                    outbyte = 0;
+                }
+            }
+        
+            // do not forget the last byte
+            if (width % 8 != 0)
+                dst[h*dstbyteperline+width/8] = outbyte;
+        }
+        wxMask* mask = new wxMask;
+        mask->m_bitmap = gdk_bitmap_create_from_data( wxGetRootWindow()->window, (gchar *) dst, width, height );
+        bmp.SetMask(mask);
+
+        free( dst );
+        gdk_image_destroy( img );
+    }
+
+    free( tablex );
+    free( tabley );
+    
+    return bmp; 
+}
+
 bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
 {
     UnRef();
@@ -342,19 +534,24 @@ bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
     wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") )
     wxCHECK_MSG( depth == -1 || depth == 1, FALSE, wxT("invalid bitmap depth") )
 
+    int width = image.GetWidth();
+    int height = image.GetHeight();
+
+    if ( width <= 0 || height <= 0 )
+    {
+        return false;
+    }
+
     m_refData = new wxBitmapRefData();
 
+    SetHeight( height );
+    SetWidth( width );
+
     // ------
     // conversion to mono bitmap:
     // ------
     if (depth == 1)
     {
-        int width = image.GetWidth();
-        int height = image.GetHeight();
-
-        SetHeight( height );
-        SetWidth( width );
-
         SetBitmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 ) );
 
         SetDepth( 1 );
@@ -445,12 +642,6 @@ bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
     // ------
     else
     {
-        int width = image.GetWidth();
-        int height = image.GetHeight();
-
-        SetHeight( height );
-        SetWidth( width );
-
         SetPixmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, -1 ) );
 
         GdkVisual *visual = wxTheApp->GetGdkVisual();
@@ -832,7 +1023,7 @@ wxImage wxBitmap::ConvertToImage() const
 }
 
 wxBitmap::wxBitmap( const wxBitmap& bmp )
-    : wxGDIObject()
+        : wxGDIObject()
 {
     Ref( bmp );
 }
@@ -844,16 +1035,24 @@ wxBitmap::wxBitmap( const wxString &filename, int type )
 
 wxBitmap::wxBitmap( const char bits[], int width, int height, int WXUNUSED(depth))
 {
-    m_refData = new wxBitmapRefData();
+    if ( width > 0 && height > 0 )
+    {
+        m_refData = new wxBitmapRefData();
 
-    M_BMPDATA->m_mask = (wxMask *) NULL;
-    M_BMPDATA->m_bitmap =
-      gdk_bitmap_create_from_data( wxGetRootWindow()->window, (gchar *) bits, width, height );
-    M_BMPDATA->m_width = width;
-    M_BMPDATA->m_height = height;
-    M_BMPDATA->m_bpp = 1;
+        M_BMPDATA->m_mask = (wxMask *) NULL;
+        M_BMPDATA->m_bitmap = gdk_bitmap_create_from_data
+                              (
+                                wxGetRootWindow()->window,
+                                (gchar *) bits,
+                                width,
+                                height
+                              );
+        M_BMPDATA->m_width = width;
+        M_BMPDATA->m_height = height;
+        M_BMPDATA->m_bpp = 1;
 
-    wxCHECK_RET( M_BMPDATA->m_bitmap, wxT("couldn't create bitmap") );
+        wxASSERT_MSG( M_BMPDATA->m_bitmap, wxT("couldn't create bitmap") );
+    }
 }
 
 wxBitmap::~wxBitmap()
@@ -945,6 +1144,11 @@ wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
     else
     {
         GdkGC *gc = gdk_gc_new( ret.GetBitmap() );
+        GdkColor col;
+        col.pixel = 0xFFFFFF;
+        gdk_gc_set_foreground( gc, &col );
+        col.pixel = 0;
+        gdk_gc_set_background( gc, &col );
         gdk_wx_draw_bitmap( ret.GetBitmap(), gc, GetBitmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
         gdk_gc_destroy( gc );
     }
@@ -955,7 +1159,12 @@ wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
 
         GdkGC *gc = gdk_gc_new( mask->m_bitmap );
-        gdk_wx_draw_bitmap( mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, 0, 0, rect.x, rect.y, rect.width, rect.height );
+        GdkColor col;
+        col.pixel = 0xFFFFFF;
+        gdk_gc_set_foreground( gc, &col );
+        col.pixel = 0;
+        gdk_gc_set_background( gc, &col );
+        gdk_wx_draw_bitmap( mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, rect.x, rect.y, 0, 0, rect.width, rect.height );
         gdk_gc_destroy( gc );
 
         ret.SetMask( mask );
@@ -981,7 +1190,8 @@ bool wxBitmap::LoadFile( const wxString &name, int type )
 {
     UnRef();
 
-    if (!wxFileExists(name)) return FALSE;
+    if (!wxFileExists(name))
+        return FALSE;
 
     GdkVisual *visual = wxTheApp->GetGdkVisual();
 
@@ -991,7 +1201,13 @@ bool wxBitmap::LoadFile( const wxString &name, int type )
 
         GdkBitmap *mask = (GdkBitmap*) NULL;
 
-        M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm( wxGetRootWindow()->window, &mask, NULL, name.fn_str() );
+        M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm
+                              (
+                                wxGetRootWindow()->window,
+                                &mask,
+                                NULL,
+                                name.fn_str()
+                              );
 
         if (mask)
         {
@@ -1006,10 +1222,10 @@ bool wxBitmap::LoadFile( const wxString &name, int type )
     else // try if wxImage can load it
     {
         wxImage image;
-        if (!image.LoadFile( name, type )) return FALSE;
-        if (image.Ok())
-            *this = wxBitmap(image);
-        else return FALSE;
+        if ( !image.LoadFile( name, type ) || !image.Ok() )
+            return FALSE;
+
+        *this = wxBitmap(image);
     }
 
     return TRUE;
@@ -1017,42 +1233,48 @@ bool wxBitmap::LoadFile( const wxString &name, int type )
 
 wxPalette *wxBitmap::GetPalette() const
 {
-    if (!Ok()) return (wxPalette *) NULL;
+    if (!Ok())
+        return (wxPalette *) NULL;
 
     return M_BMPDATA->m_palette;
 }
 
 void wxBitmap::SetHeight( int height )
 {
-    if (!m_refData) m_refData = new wxBitmapRefData();
+    if (!m_refData)
+        m_refData = new wxBitmapRefData();
 
     M_BMPDATA->m_height = height;
 }
 
 void wxBitmap::SetWidth( int width )
 {
-    if (!m_refData) m_refData = new wxBitmapRefData();
+    if (!m_refData)
+        m_refData = new wxBitmapRefData();
 
     M_BMPDATA->m_width = width;
 }
 
 void wxBitmap::SetDepth( int depth )
 {
-    if (!m_refData) m_refData = new wxBitmapRefData();
+    if (!m_refData)
+        m_refData = new wxBitmapRefData();
 
     M_BMPDATA->m_bpp = depth;
 }
 
 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
 {
-    if (!m_refData) m_refData = new wxBitmapRefData();
+    if (!m_refData)
+        m_refData = new wxBitmapRefData();
 
     M_BMPDATA->m_pixmap = pixmap;
 }
 
 void wxBitmap::SetBitmap( GdkPixmap *bitmap )
 {
-    if (!m_refData) m_refData = new wxBitmapRefData();
+    if (!m_refData)
+        m_refData = new wxBitmapRefData();
 
     M_BMPDATA->m_bitmap = bitmap;
 }