diff --git a/src/Makefile b/src/Makefile
index 86ff8a0..df44460 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -3,7 +3,7 @@ RESOURCES=../resources
 SPLASHSCREEN=splash-vmwcblk.png
 
 OBJS=main.o sysinput.o ep_init.o ep_upiwin.o ep_backlight.o ep_msg.o ep_devctxt.o ep_upiwin_tmp.o ep_util.o \
-     fbinit.o rect.o gfxobj.o devctxt.o dc_screen.o fontengine.o fbprimitive.o \
+     fbinit.o rect.o gfxobj.o devctxt.o dc_screen.o fontengine.o bitmap.o fbprimitive.o \
      log.o gpio.o msg_queue.o time_func.o config.o splash.o
 LIBS=-lpython3.7m -lcrypt -lfreetype -lbcm2835 -lpthread -ldl -lutil -lm
 CFLAGS=-I/usr/include/python3.7m -I/usr/include/freetype2 -I/usr/include/libpng16 \
diff --git a/src/bitmap.c b/src/bitmap.c
new file mode 100755
index 0000000..180d3f8
--- /dev/null
+++ b/src/bitmap.c
@@ -0,0 +1,25 @@
+#include <stdlib.h>
+#include <string.h>
+#include "bitmap.h"
+
+PBITMAP BMP_Create(INT32 width, INT32 height, const VOID *bits)
+{
+  PBITMAP rc;
+  UINT32 tot_size = sizeof(BITMAP) + (width * height * sizeof(UINT16));
+
+  rc = (PBITMAP)malloc(tot_size);
+  if (!rc)
+    return NULL;
+  memset(rc, 0, tot_size);
+  _Go_init(&(rc->hdr), BMP_SIG_WORD, tot_size);
+  rc->width = width;
+  rc->height = height;
+  if (bits)
+    memcpy(rc->bits, bits, width * height * sizeof(UINT16));
+  return rc;
+}
+
+void BMP_Delete(PBITMAP pbmp)
+{
+  Go_release(&(pbmp->hdr));
+}
diff --git a/src/bitmap.h b/src/bitmap.h
new file mode 100755
index 0000000..db09917
--- /dev/null
+++ b/src/bitmap.h
@@ -0,0 +1,19 @@
+#ifndef __BITMAP_H_INCLUDED
+#define __BITMAP_H_INCLUDED
+
+#include "wintype.h"
+#include "gfxobj.h"
+
+#define BMP_SIG_WORD  0x706D4221    /* !Bmp */
+
+typedef struct tagBITMAP {
+  GFXOBJECT hdr;
+  INT32 width;
+  INT32 height;
+  UINT16 bits[0];
+} BITMAP, *PBITMAP;
+
+extern PBITMAP BMP_Create(INT32 width, INT32 height, const VOID *bits);
+extern void BMP_Delete(PBITMAP pbmp);
+
+#endif /* __BITMAP_H_INCLUDED */
\ No newline at end of file
diff --git a/src/dc_screen.c b/src/dc_screen.c
index 37d173e..caf5595 100755
--- a/src/dc_screen.c
+++ b/src/dc_screen.c
@@ -3,6 +3,7 @@
 #include "fbinit.h"
 #include "devctxt.h"
 #include "dc_screen.h"
+#include "bitmap.h"
 
 inline static PUINT16 loc_from_coords(PSCREENPRIVDATA priv, INT32 x, INT32 y)
 {
@@ -151,9 +152,97 @@ static BOOL screen_line(PVOID privdata, INT32 x1, INT32 y1, INT32 x2, INT32 y2,
   return TRUE;
 }
 
+static BOOL screen_solid_rect(PVOID privdata, PRECT rect, COLORREF color, INT32 op)
+{
+  PSCREENPRIVDATA priv = (PSCREENPRIVDATA)privdata;
+  UINT16 pencolor = native_from_COLORREF(color);
+  PUINT16 ps, p;
+  int y, x;
+  
+  ps = loc_from_coords(rect->left, rect->top);
+  for (y = rect->top; y < rect->bottom; y++)
+  {
+    p = ps;
+	for (x = rect->left; x < rect->right; x++)
+	{
+	  *p = apply_rop2(op, *p, pencolor);
+	  ++p;
+	}
+	ps += priv->pix_per_row;
+  }
+  return TRUE;
+}
+
+static PDCTXT screen_create_compat(PVOID privdata)
+{
+  PSCREENPRIVDATA priv_new;
+  PBITMAP pbmp;
+  
+  pbmp = BMP_Create(1, 1, NULL);
+  if (!pbmp)
+    return NULL;
+  priv_new = (PSCREENPRIVDATA)malloc(sizeof(SCREENPRIVDATA));
+  if (!priv_new)
+  {
+    Go_release(&(pbmp->hdr));
+    return NULL;
+  }
+  priv_new->pix_per_row = pbmp->width;
+  priv_new->pdata = pbmp->bits;
+  
+  rc = _DC_Allocate(&screen_funtable, priv_new);
+  if (rc)
+  {
+    rc->hdr.dtor = screen_context_destroy;
+	rc->flags = DCFLG_IS_MEMORY;
+	rc->baserect.left = rc->baserect.top = 0;
+	rc->baserect.right = pbmp->width;
+	rc->baserect.bottom = pbmp->height;
+	memcpy(&(rc->cliprect), &(rc->baserect), sizeof(RECT));
+	rc->cur_bitmap = pbmp;
+  }
+  else
+  {
+    free(priv);
+	Go_release(&(pbmp->hdr));
+  }
+  return rc;
+}
+
+BOOL screen_new_bitmap(PVOID privdata, PBITMAP pbmp)
+{
+  PSCREENPRIVDATA priv = (PSCREENPRIVDATA)privdata;
+  priv->pix_per_row = pbmp->width;
+  priv->pdata = pbmp->bits;
+  return TRUE;
+}
+
+BOOL screen_bitblt(PVOID p_dest, PRECT r_dest, PVOID p_src, PRECT r_src, UINT32 op)
+{
+  PSCREENPRIVDATA dest = (PSCREENPRIVDATA)p_dest;
+  PSCREENPRIVDATA src = (PSCREENPRIVDATA)p_src;
+  PUINT16 pd, ps;
+  INT32 width, i;
+  
+  pd = loc_from_coords(dest, r_dest->left, r_dest->top);
+  ps = loc_from_coords(src, r_src->left, r_src->top);
+  width = r_src->right - r_src->left;
+  for (i = r_src->top; i < r_src->bottom; ++i)
+  {
+    memcpy(pd, ps, width * sizeof(UINT16));
+    pd += dest->pix_per_row;
+	ps += src->pix_per_row;
+  }
+  return TRUE;
+}
+
 static const DCFUNTABLE screen_funtable = {
   screen_set_pixel,
-  screen_line
+  screen_line,
+  screen_solid_rect,
+  screen_create_compat,
+  screen_new_bitmap,
+  screen_bitblt
 };
 
 static void screen_context_destroy(PVOID obj)
@@ -178,11 +267,18 @@ PDCTXT DC_CreateScreenContext(void)
   if (rc)
   {
     rc->hdr.dtor = screen_context_destroy;
-	rc->cliprect.left = rc->cliprect.top = 0;
-	rc->cliprect.right = Fb_Info->width - 1;
-	rc->cliprect.bottom = Fb_Info->height - 1;
+	rc->flags = DCFLG_IS_SCREEN;
+	rc->baserect.left = rc->baserect.top = 0;
+	rc->baserect.right = Fb_Info->width;
+	rc->baserect.bottom = Fb_Info->height;
+	memcpy(&(rc->cliprect), &(rc->baserect), sizeof(RECT));
   }
   else
     free(priv);
   return rc;
 }
+
+PDCTXT _DC_CreateScreenCompatibleContext(void)
+{
+  return screen_create_compat(NULL);
+}
diff --git a/src/dc_screen.h b/src/dc_screen.h
index ecd4f31..560187c 100755
--- a/src/dc_screen.h
+++ b/src/dc_screen.h
@@ -10,5 +10,6 @@ typedef struct tagSCREENPRIVDATA {
 } SCREENPRIVDATA, *PSCREENPRIVDATA;
 
 extern PDCTXT DC_CreateScreenContext(void);
+extern PDCTXT _DC_CreateScreenCompatibleContext(void);
 
 #endif /* __DC_SCREEN_H_INCLUDED */
diff --git a/src/devctxt.c b/src/devctxt.c
index 9971cbc..9e954d3 100755
--- a/src/devctxt.c
+++ b/src/devctxt.c
@@ -4,6 +4,8 @@
 #include "gfxtype.h"
 #include "gfxobj.h"
 #include "devctxt.h"
+#include "bitmap.h"
+#include "dc_screen.h"
 
 inline static BYTE line_clip_outcode(INT32 x, INT32 y, INT32 xmin, INT32 ymin, INT32 xmax, INT32 ymax)
 {
@@ -124,7 +126,8 @@ PDCTXT _DC_Allocate(PDCFUNTABLE funcs, PVOID privdata)
 
 void _DC_FinalizeCommon(PDCTXT pdctxt)
 {
-  /* nothing here yet */
+  if (pdctxt->cur_bitmap)
+    Go_release(&(pdctxt->cur_bitmap->hdr));
 }
 
 COLORREF DC_SetPixel(PDCTXT pdctxt, INT32 x, INT32 y, COLORREF color)
@@ -163,6 +166,15 @@ BOOL DC_Rectangle(PDCTXT pdctxt, INT32 left, INT32 top, INT32 right, INT32 botto
   return TRUE;
 }
 
+BOOL DC_SolidRectangle(PDCTXT pdctxt, INT32 left, INT32 top, INT32 right, INT32 bottom)
+{
+  RECT rect, actual;
+  G_set_rect(&rect, left, top, right, bottom);
+  if (!G_intersect_rect(&actual, &rect, &(pdctxt->cliprect)))
+    return TRUE;
+  return (*(pdctxt->funcs-solid_rect))(pdctxt->privdata, &actual, pdctxt->color, pdctxt->rop2);
+}
+
 UINT32 DC_GetROP2(PDCTXT pdctxt)
 {
   return pdctxt->rop2;
@@ -198,3 +210,50 @@ BOOL DC_SetClipRect(PDCTXT pdctxt, PRECT prect)
   memcpy(&(pdctxt->cliprect), prect, sizeof(RECT));
   return TRUE;
 }
+
+PDCTXT DC_CreateCompatible(PDCTXT pdctxt)
+{
+  if (pdctxt)
+    return (*(pdctxt->funcs->create_compat))(pdctxt->privdata);
+  return _DC_CreateScreenCompatibleContext();
+}
+
+PGFXOBJECT DC_SelectObject(PDCTXT pdctxt, PGFXOBJECT pobj)
+{
+  if (pobj->sig == BMP_SIG_WORD)
+  {
+    if ((pdctxt->flags & DCFLG_TYPES) == DCFLG_IS_MEMORY)
+	{
+	  RECT rtmp;
+      PBITMAP rbmp = pdctxt->cur_bitmap;
+      Go_addref(pobj);
+	  if ((*(pdctxt->funcs->new_bitmap))(pdctxt->privdata, (PBITMAP)pobj))
+	  {
+	    pdctxt->cur_bitmap = (PBITMAP)pobj;
+		pdctxt->baserect.left = pdctxt->baserect.top = 0;
+		pdctxt->baserect.right = ((PBITMAP)pobj)->width;
+		pdctxt->baserect.bottom = ((PBITMAP)pobj)->height;
+		G_intersect_rect(&rtmp, &(pdctxt->baserect), &(pdctxt->cliprect));
+		memcpy(&(pdctxt->cliprect), &rtmp, sizeof(RECT));
+	    return rbmp;
+	  }
+	  Go_release(pobj);
+	}
+  }
+  return NULL;
+}
+
+BOOL DC_BitBlt(PDCTXT dest, INT32 x, INT32 y, INT32 width, INT32 height, PDCTXT source, INT32 x1, INT32 y1, UINT32 rop)
+{
+  RECT destrect, actualdest, srcrect, actualsrc;
+  
+  G_set_rect(&destrect, x, y, x + width, y + height);
+  if (!G_rect_intersect(&actualdest, &destrect, &(dest->cliprect)))
+    return TRUE;  /* no-op */
+  G_set_rect(&srcrect, x1, y1, x1 + (actualdest.right - actualdest.left), y1 + (actualdest.bottom - actualdest.top));
+  if (!G_rect_intersect(&actualsrc, &srcrect, &(src->baserect)))
+    return TRUE;
+  actualdest.right = actualdest.left + (actualsrc.right - actualsrc.left);
+  actualdest.bottom = actualdest.top + (actualsrc.bottom - actualsrc.top);
+  return (*(dest->funcs->bitblt))(dest->privdata, &actualdest, src->privdata, &actualsrc, rop);
+}
diff --git a/src/devctxt.h b/src/devctxt.h
index 1b8d3a4..327aab3 100755
--- a/src/devctxt.h
+++ b/src/devctxt.h
@@ -27,10 +27,18 @@
 
 typedef COLORREF (*DCtx_SetPixel)(PVOID privdata, INT32 x, INT32 y, COLORREF color, INT32 op);
 typedef BOOL (*DCtx_Line)(PVOID privdata, INT32 x1, INT32 y1, INT32 x2, INT32 y2, COLORREF color, INT32 op);
+typedef BOOL (*DCtx_SolidRect)(PVOID privdata, PRECT rect, COLORREF color, INT32 op);
+typedef PDCTXT (*DCtx_CreateCompat)(PVOID privdata);
+typedef BOOL (*DCtx_NewBitmap)(PVOID privdata, PBITMAP pbmp);
+typedef BOOL (*DCtx_BitBlt)(PVOID p_dest, PRECT r_dest, PVOID p_src, PRECT r_src, UINT32 op);
 
 typedef struct tagDCFUNTABLE {
-  DCtx_SetPixel set_pixel;   /* sets a single pixel on the display */
-  DCtx_Line line;            /* draws a line on the display */
+  DCtx_SetPixel set_pixel;          /* sets a single pixel on the display */
+  DCtx_Line line;                   /* draws a line on the display */
+  DCtx_SolidRect solid_rect;        /* draws a solid rectangle on the display */
+  DCtx_CreateCompat create_compat;  /* create a memory DC compatible with this one */
+  DCtx_NewBitmap new_bitmap;        /* new bitmap selected notification */
+  DCtx_BitBlt bitblt;               /* bit block transfer */
 } DCFUNTABLE;
 
 typedef const DCFUNTABLE *PDCFUNTABLE;
@@ -39,12 +47,19 @@ typedef struct tagDCTXT {
   GFXOBJECT hdr;      /* the header of all objects */
   PDCFUNTABLE funcs;  /* device context functions */
   PVOID privdata;     /* private data for the type of DC */
+  UINT32 flags;       /* flags for the DC */
+  RECT baserect;      /* base rectangle */
   RECT cliprect;      /* clipping rectangle */
   POINT pos;          /* current position */
   UINT32 rop2;        /* current raster operation */
   COLORREF color;     /* current drawing color (XXX replace with pens later) */
+  PBITMAP cur_bitmap; /* current selected bitmap */
 } DCTXT, *PDCTXT;
 
+#define DCFLG_TYPES      0x03
+#define DCFLG_IS_SCREEN  0x00
+#define DCFLG_IS_MEMORY  0x01
+
 extern PDCTXT _DC_Allocate(PDCFUNTABLE funcs, PVOID privdata);
 extern void _DC_FinalizeCommon(PDCTXT pdctxt);
 
@@ -52,12 +67,16 @@ extern COLORREF DC_SetPixel(PDCTXT pdctxt, INT32 x, INT32 y, COLORREF color);
 extern BOOL DC_LineTo(PDCTXT pdctxt, INT32 x, INT32 y);
 extern BOOL DC_MoveTo(PDCTXT pdctxt, INT32 x, INT32 y, PPOINT oldpt);
 extern BOOL DC_Rectangle(PDCTXT pdctxt, INT32 left, INT32 top, INT32 right, INT32 bottom);
+extern BOOL DC_SolidRectangle(PDCTXT pdctxt, INT32 left, INT32 top, INT32 right, INT32 bottom);
 extern UINT32 DC_GetROP2(PDCTXT pdctxt);
 extern UINT32 DC_SetROP2(PDCTXT pdctxt, UINT32 rop);
 extern COLORREF DC_GetTextColor(PDCTXT pdctxt);
 extern COLORREF DC_SetTextColor(PDCTXT pdctxt, COLORREF cr);
 extern BOOL DC_GetClipRect(PDCTXT pdctxt, PRECT prect);
 extern BOOL DC_SetClipRect(PDCTXT pdctxt, PRECT prect);
+extern PDCTXT DC_CreateCompatible(PDCTXT pdctxt);
+extern PGFXOBJECT DC_SelectObject(PDCTXT pdctxt, PGFXOBJECT pobj);
+extern BOOL DC_BitBlt(PDCTXT dest, INT32 x, INT32 y, INT32 width, INT32 height, PDCTXT source, INT32 x1, INT32 y1, UINT32 rop);
 
 #define DC_addref(pdctxt)   Go_addref(&(pdctxt->hdr))
 #define DC_release(pdctxt)  Go_release(&(pdctxt->hdr))
diff --git a/src/ep_devctxt.c b/src/ep_devctxt.c
index 651f317..e61611e 100755
--- a/src/ep_devctxt.c
+++ b/src/ep_devctxt.c
@@ -13,6 +13,8 @@ typedef struct tagDevCtxtObject {
   PDCTXT pdctxt;
 } DevCtxtObject;
 
+PyTypeObject DevCtxtType;  /* forward declaration */
+
 static PyObject *devctxt_set_pixel(DevCtxtObject *self, PyObject *args)
 {
   INT32 x, y;
@@ -77,6 +79,41 @@ static PyObject *devctxt_rectangle(DevCtxtObject *self, PyObject *args)
   return PyBool_FromLong(rc);
 }
 
+static PyObject *devctxt_solid_rectangle(DevCtxtObject *self, PyObject *args)
+{
+  INT32 left, top, right, bottom;
+  BOOL rc;
+  
+  if (!PyArg_ParseTuple(args, "iiii", &left, &top, &right, &bottom))
+    return NULL;
+  if (!(self->pdctxt))
+  {
+    PyErr_SetString(PyExc_RuntimeError, "bad device context");
+    return NULL;
+  }
+  rc = DC_SolidRectangle(self->pdctxt, left, top, right, bottom);
+  return PyBool_FromLong(rc);
+}
+
+static PyObject *devctxt_bitblt(DevCtxtObject *self, PyObject *args)
+{
+  INT32 x, y, width, height, x1, y1;
+  UINT32 rop;
+  DevCtxtObject *source;
+  BOOL rc;
+  
+  if (!PyArg_ParseTuple(args, "iiiiO!iik", &x, &y, &width, &height, &DevCtxtType, &source, &x1, &y1, &rop))
+    return NULL;
+  if (!(self->pdctxt) || !(source->pdctxt))
+  {
+    PyErr_SetString(PyExc_RuntimeError, "bad device context");
+    return NULL;
+  }
+
+  rc = DC_BitBlt(self->pdctxt, x, y, width, height, source->pdctxt, x1, y1, rop);
+  return PyBool_FromLong(rc);
+}
+
 static PyObject *devctxt_get_clip_rect(DevCtxtObject *self, PyObject *args)
 {
   RECT rect;
@@ -117,6 +154,10 @@ static PyMethodDef DevCtxtMethods[] = {
    "Draws a line from the current position to the specified location."},
   {"rectangle", (PyCFunction)devctxt_rectangle, METH_VARARGS,
    "Draws a rectangle."},
+  {"solid_rectangle", (PyCFunction)devctxt_solid_rectangle, METH_VARARGS,
+   "Draws a solid rectangle."},
+  {"bitblt", (PyCFunction)devctxt_bitblt, METH_VARARGS,
+   "Copy bits from one device context to another."},
   {"get_clip_rect", (PyCFunction)devctxt_get_clip_rect, METH_VARARGS,
    "Returns the current clipping rectangle of the device context."},
   {"set_clip_rect", (PyCFunction)devctxt_set_clip_rect, METH_VARARGS,
@@ -218,6 +259,15 @@ static int devctxt_init(DevCtxtObject *self, PyObject *args, PyObject *kwds)
 	  return -1;
 	}
   }
+  else if (strcmp(type, "memory") == 0)
+  {
+    self->pdctxt = _DC_CreateScreenCompatibleContext();
+	if (!(self->pdctxt))
+    {
+	  PyErr_SetString(PyExc_RuntimeError, "unable to create memory context");
+	  return -1;
+	}
+  }
   else
   {
     PyErr_Format(PyExc_RuntimeError, "invalid type '%s'", type);
@@ -226,7 +276,7 @@ static int devctxt_init(DevCtxtObject *self, PyObject *args, PyObject *kwds)
   return 0;
 }
 
-static PyTypeObject DevCtxtType = {
+PyTypeObject DevCtxtType = {
   PyVarObject_HEAD_INIT(NULL, 0)
   .tp_name = "upiwin.DevCtxt",
   .tp_doc = "Device context object",