From 80f074806db0fdd9646f7b5892d43a558c3a8f9b Mon Sep 17 00:00:00 2001
From: scuri <scuri>
Date: Wed, 3 Nov 2010 18:37:03 +0000
Subject: Fixed: PutImageRGB, PutImageRGBA, PutImageMap and Pattern when in
 64bits using the Cairo context plus base driver. Improved double buffer
 update.

---
 html/en/history.html          |   8 ++++
 include/cd_private.h          |   1 +
 src/cairo/cdcairo.c           | 105 ++++++++++++++++++++++++++++++------------
 src/cairo/cdcairodbuf.c       |  22 +--------
 src/cairo/cdcaironative_gdk.c |   1 +
 src/cd.c                      |  49 +++++++++++++-------
 src/cd.def                    |   1 +
 src/cdgdk.def                 |   1 +
 src/drv/cdirgb.c              |  28 ++---------
 src/gdk/cdgdkdbuf.c           |  21 +--------
 src/win32/cdwdbuf.c           |  27 ++---------
 src/x11/cdxdbuf.c             |  22 +--------
 12 files changed, 130 insertions(+), 156 deletions(-)

diff --git a/html/en/history.html b/html/en/history.html
index 20acc64..b037528 100644
--- a/html/en/history.html
+++ b/html/en/history.html
@@ -65,6 +65,14 @@
 	<li>
 		<span class="hist_fixed">Fixed:</span> Cairo context plus base driver 
 		when used with GDK.</li>
+	<li>
+		<span class="hist_fixed">Fixed:</span> <strong>PutImageRGB</strong>,
+		<strong>PutImageRGBA</strong>, <strong>PutImageMap</strong> and <strong>
+		Pattern</strong> when in 64bits using the Cairo context plus base 
+		driver.</li>
+	<li>
+		<span class="hist_fixed">Fixed:</span> resources release in Win32 double 
+		buffer driver.</li>
 </ul>
 <h3><a href="http://sourceforge.net/projects/canvasdraw/files/5.4/">Version 5.4</a> (24/June/2010)</h3>
 <ul>
diff --git a/include/cd_private.h b/include/cd_private.h
index 05395b2..121a000 100644
--- a/include/cd_private.h
+++ b/include/cd_private.h
@@ -244,6 +244,7 @@ int cdBaseDriver(void);
 /* attributes  */
 /***************/
 void cdRegisterAttribute(cdCanvas* canvas, cdAttribute* attrib);
+void cdUpdateAttributes(cdCanvas* canvas);
 
 /***************/
 /* vector font */
diff --git a/src/cairo/cdcairo.c b/src/cairo/cdcairo.c
index b86c046..493ae1f 100644
--- a/src/cairo/cdcairo.c
+++ b/src/cairo/cdcairo.c
@@ -117,7 +117,8 @@ void cdcairoKillCanvas(cdCtxCanvas *ctxcanvas)
   if (ctxcanvas->strLastConvertUTF8)
     g_free(ctxcanvas->strLastConvertUTF8);
 
-  cairo_destroy(ctxcanvas->cr);
+  if (ctxcanvas->cr)
+    cairo_destroy(ctxcanvas->cr);
 
   memset(ctxcanvas, 0, sizeof(cdCtxCanvas));
   free(ctxcanvas);
@@ -213,7 +214,7 @@ static int cdclip(cdCtxCanvas *ctxcanvas, int mode)
 
 #define CD_ALPHAPRE(_src, _alpha) (((_src)*(_alpha))/255)
 
-static unsigned long sEncodeRGBA(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
+static unsigned int sEncodeRGBA(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
 {
   /* Pre-multiplied alpha */
   if (a != 255)
@@ -223,23 +224,32 @@ static unsigned long sEncodeRGBA(unsigned char r, unsigned char g, unsigned char
     b = CD_ALPHAPRE(b, a);
   }
 
-  return (((unsigned long)a) << 24) |
-         (((unsigned long)r) << 16) |
-         (((unsigned long)g) <<  8) |
-         (((unsigned long)b) <<  0);
+  return (((unsigned int)a) << 24) |
+         (((unsigned int)r) << 16) |
+         (((unsigned int)g) <<  8) |
+         (((unsigned int)b) <<  0);
 }
 
 static void make_pattern(cdCtxCanvas *ctxcanvas, int n, int m, void* userdata, int (*data2rgb)(cdCtxCanvas *ctxcanvas, int n, int i, int j, void* userdata, unsigned char*r, unsigned char*g, unsigned char*b, unsigned char*a))
 {
-  int i, j, offset, ret;
+  int i, j, offset, ret, stride;
   unsigned char r, g, b, a;
   cairo_surface_t* pattern_surface;
-  unsigned long* data;
+  unsigned int* data;
 
+  /* CAIRO_FORMAT_ARGB32 each pixel is a 32-bit quantity, with alpha in the upper 8 bits, then red, then green, then blue. 
+     The 32-bit quantities are stored native-endian. 
+     Pre-multiplied alpha is used. (That is, 50% transparent red is 0x80800000, not 0x80ff0000.) */
   pattern_surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, n, m);
+  if (cairo_surface_status(pattern_surface) != CAIRO_STATUS_SUCCESS)
+  {
+    cairo_surface_destroy(pattern_surface);
+    return;
+  }
 
-  data = (unsigned long*)cairo_image_surface_get_data(pattern_surface);
-  offset = cairo_image_surface_get_stride(pattern_surface)/4 - n;
+  data = (unsigned int*)cairo_image_surface_get_data(pattern_surface);
+  stride = cairo_image_surface_get_stride(pattern_surface);
+  offset = stride/4 - n;
 
   for (j = 0; j < m; j++)
   {
@@ -284,7 +294,7 @@ static int long2rgb(cdCtxCanvas *ctxcanvas, int n, int i, int j, void* data, uns
   return 1;
 }
 
-static void cdpattern(cdCtxCanvas *ctxcanvas, int n, int m, const long int *pattern)
+static void cdpattern(cdCtxCanvas *ctxcanvas, int n, int m, const long *pattern)
 {
   make_pattern(ctxcanvas, n, m, (void*)pattern, long2rgb);
   cairo_set_source(ctxcanvas->cr, ctxcanvas->pattern);
@@ -572,7 +582,7 @@ static void cdgetfontdim(cdCtxCanvas *ctxcanvas, int *max_width, int *height, in
   pango_font_metrics_unref(metrics); 
 }
 
-static long int cdforeground(cdCtxCanvas *ctxcanvas, long int color)
+static long cdforeground(cdCtxCanvas *ctxcanvas, long color)
 {
   if (ctxcanvas->solid)
     cairo_pattern_destroy(ctxcanvas->solid);
@@ -1288,8 +1298,8 @@ static void cdfpoly(cdCtxCanvas *ctxcanvas, int mode, cdfPoint* poly, int n)
 
 static void cdgetimagergb(cdCtxCanvas *ctxcanvas, unsigned char *r, unsigned char *g, unsigned char *b, int x, int y, int w, int h)
 {
-  int i, j, pos, offset;
-  unsigned long* data;
+  int i, j, pos, offset, stride;
+  unsigned int* data;
   cairo_surface_t* image_surface;
   cairo_t* cr;
 
@@ -1304,7 +1314,15 @@ static void cdgetimagergb(cdCtxCanvas *ctxcanvas, unsigned char *r, unsigned cha
   /* y is the bottom-left of the image in CD, must be at upper-left */
   y -= h-1;
 
+  /* CAIRO_FORMAT_RGB24	each pixel is a 32-bit quantity, with the upper 8 bits unused. 
+     Red, Green, and Blue are stored in the remaining 24 bits in that order. */
   image_surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24, w, h);
+  if (cairo_surface_status(image_surface) != CAIRO_STATUS_SUCCESS)
+  {
+    cairo_surface_destroy(image_surface);
+    return;
+  }
+
   cr = cairo_create(image_surface);
 
   /* creates a pattern from the canvas and sets it as source in the image. */
@@ -1314,8 +1332,9 @@ static void cdgetimagergb(cdCtxCanvas *ctxcanvas, unsigned char *r, unsigned cha
   cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
   cairo_paint(cr);  /* paints the current source everywhere within the current clip region. */
 
-  data = (unsigned long*)cairo_image_surface_get_data(image_surface);
-  offset = cairo_image_surface_get_stride(image_surface)/4 - w;
+  data = (unsigned int*)cairo_image_surface_get_data(image_surface);
+  stride = cairo_image_surface_get_stride(image_surface);
+  offset = stride/4 - w;
 
   for (i=0; i<h; i++)
   {
@@ -1351,8 +1370,8 @@ static void sFixImageY(cdCanvas* canvas, int *topdown, int *y, int h)
 
 static void cdputimagerectrgb(cdCtxCanvas *ctxcanvas, int iw, int ih, const unsigned char *r, const unsigned char *g, const unsigned char *b, int x, int y, int w, int h, int xmin, int xmax, int ymin, int ymax)
 {
-  int i, j, rw, rh, pos, offset, topdown;
-  unsigned long* data;
+  int i, j, rw, rh, pos, offset, topdown, stride;
+  unsigned int* data;
   cairo_surface_t* image_surface;
 
   if (xmin<0 || ymin<0 || xmax-xmin+1>iw || ymax-ymin+1>ih) return;
@@ -1360,10 +1379,18 @@ static void cdputimagerectrgb(cdCtxCanvas *ctxcanvas, int iw, int ih, const unsi
   rw = xmax-xmin+1;
   rh = ymax-ymin+1;
 
+  /* CAIRO_FORMAT_RGB24	each pixel is a 32-bit quantity, with the upper 8 bits unused. 
+     Red, Green, and Blue are stored in the remaining 24 bits in that order. */
   image_surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24, rw, rh);
+  if (cairo_surface_status(image_surface) != CAIRO_STATUS_SUCCESS)
+  {
+    cairo_surface_destroy(image_surface);
+    return;
+  }
 
-  data = (unsigned long*)cairo_image_surface_get_data(image_surface);
-  offset = cairo_image_surface_get_stride(image_surface)/4 - rw;
+  data = (unsigned int*)cairo_image_surface_get_data(image_surface);
+  stride = cairo_image_surface_get_stride(image_surface);
+  offset = stride/4 - rw;
 
   sFixImageY(ctxcanvas->canvas, &topdown, &y, h);
 
@@ -1404,8 +1431,8 @@ static void cdputimagerectrgb(cdCtxCanvas *ctxcanvas, int iw, int ih, const unsi
 
 static void cdputimagerectrgba(cdCtxCanvas *ctxcanvas, int iw, int ih, const unsigned char *r, const unsigned char *g, const unsigned char *b, const unsigned char *a, int x, int y, int w, int h, int xmin, int xmax, int ymin, int ymax)
 {
-  int i, j, rw, rh, pos, offset, topdown;
-  unsigned long* data;
+  int i, j, rw, rh, pos, offset, topdown, stride;
+  unsigned int* data;
   cairo_surface_t* image_surface;
 
   if (xmin<0 || ymin<0 || xmax-xmin+1>iw || ymax-ymin+1>ih) return;
@@ -1413,10 +1440,19 @@ static void cdputimagerectrgba(cdCtxCanvas *ctxcanvas, int iw, int ih, const uns
   rw = xmax-xmin+1;
   rh = ymax-ymin+1;
 
+  /* CAIRO_FORMAT_ARGB32 each pixel is a 32-bit quantity, with alpha in the upper 8 bits, then red, then green, then blue. 
+     The 32-bit quantities are stored native-endian. 
+     Pre-multiplied alpha is used. (That is, 50% transparent red is 0x80800000, not 0x80ff0000.) */
   image_surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, rw, rh);
+  if (cairo_surface_status(image_surface) != CAIRO_STATUS_SUCCESS)
+  {
+    cairo_surface_destroy(image_surface);
+    return;
+  }
 
-  data = (unsigned long*)cairo_image_surface_get_data(image_surface);
-  offset = cairo_image_surface_get_stride(image_surface)/4 - rw;
+  data = (unsigned int*)cairo_image_surface_get_data(image_surface);
+  stride = cairo_image_surface_get_stride(image_surface);
+  offset = stride/4 - rw;
 
   sFixImageY(ctxcanvas->canvas, &topdown, &y, h);
 
@@ -1469,10 +1505,11 @@ static int sCalcPalSize(int size, const unsigned char *index)
   return pal_size;
 }
 
-static void cdputimagerectmap(cdCtxCanvas *ctxcanvas, int iw, int ih, const unsigned char *index, const long int *colors, int x, int y, int w, int h, int xmin, int xmax, int ymin, int ymax)
+static void cdputimagerectmap(cdCtxCanvas *ctxcanvas, int iw, int ih, const unsigned char *index, const long *colors, int x, int y, int w, int h, int xmin, int xmax, int ymin, int ymax)
 {
-  int i, j, rw, rh, pos, offset, pal_size, topdown;
-  unsigned long* data, cairo_colors[256], c;
+  int i, j, rw, rh, pos, offset, pal_size, topdown, stride;
+  unsigned int* data, cairo_colors[256];
+  long c;
   cairo_surface_t* image_surface;
 
   if (xmin<0 || ymin<0 || xmax-xmin+1>iw || ymax-ymin+1>ih) return;
@@ -1480,10 +1517,18 @@ static void cdputimagerectmap(cdCtxCanvas *ctxcanvas, int iw, int ih, const unsi
   rw = xmax-xmin+1;
   rh = ymax-ymin+1;
 
+  /* CAIRO_FORMAT_RGB24	each pixel is a 32-bit quantity, with the upper 8 bits unused. 
+     Red, Green, and Blue are stored in the remaining 24 bits in that order. */
   image_surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24, rw, rh);
+  if (cairo_surface_status(image_surface) != CAIRO_STATUS_SUCCESS)
+  {
+    cairo_surface_destroy(image_surface);
+    return;
+  }
 
-  data = (unsigned long*)cairo_image_surface_get_data(image_surface);
-  offset = cairo_image_surface_get_stride(image_surface)/4 - rw;
+  data = (unsigned int*)cairo_image_surface_get_data(image_surface);
+  stride = cairo_image_surface_get_stride(image_surface);
+  offset = stride/4 - rw;
 
   pal_size = sCalcPalSize(iw*ih, index);
   for (i=0; i<pal_size; i++)
@@ -1529,7 +1574,7 @@ static void cdputimagerectmap(cdCtxCanvas *ctxcanvas, int iw, int ih, const unsi
   cairo_restore (ctxcanvas->cr);
 }
 
-static void cdpixel(cdCtxCanvas *ctxcanvas, int x, int y, long int color)
+static void cdpixel(cdCtxCanvas *ctxcanvas, int x, int y, long color)
 {
   cairo_pattern_t* old_source = cairo_get_source(ctxcanvas->cr);
   cairo_set_source_rgba(ctxcanvas->cr, cdCairoGetRed(color), cdCairoGetGreen(color), cdCairoGetBlue(color), cdCairoGetAlpha(color));
diff --git a/src/cairo/cdcairodbuf.c b/src/cairo/cdcairodbuf.c
index 4c5897a..91f1649 100644
--- a/src/cairo/cdcairodbuf.c
+++ b/src/cairo/cdcairodbuf.c
@@ -112,31 +112,13 @@ static int cdactivate(cdCtxCanvas* ctxcanvas)
 
     /* remove the old image and canvas */
     cdKillImage(old_image_dbuffer);
+    old_ctxcanvas->cr = NULL; /* avoid to destroy it twice */
     cdcairoKillCanvas(old_ctxcanvas);
 
     ctxcanvas = canvas->ctxcanvas;
 
     /* update canvas attributes */
-    canvas->cxBackground(ctxcanvas, canvas->background);
-    canvas->cxForeground(ctxcanvas, canvas->foreground);
-    canvas->cxBackOpacity(ctxcanvas, canvas->back_opacity);
-    canvas->cxWriteMode(ctxcanvas, canvas->write_mode);
-    canvas->cxLineStyle(ctxcanvas, canvas->line_style);
-    canvas->cxLineWidth(ctxcanvas, canvas->line_width);
-    canvas->cxLineCap(ctxcanvas, canvas->line_cap);
-    canvas->cxLineJoin(ctxcanvas, canvas->line_join);
-    canvas->cxHatch(ctxcanvas, canvas->hatch_style);
-    if (canvas->stipple) canvas->cxStipple(ctxcanvas, canvas->stipple_w, canvas->stipple_h, canvas->stipple);
-    if (canvas->pattern) canvas->cxPattern(ctxcanvas, canvas->pattern_w, canvas->pattern_h, canvas->pattern);
-    canvas->cxInteriorStyle(ctxcanvas, canvas->interior_style);
-    canvas->cxFont(ctxcanvas, canvas->font_type_face, canvas->font_style, canvas->font_size);
-/*    canvas->cxTextAlignment(ctxcanvas, canvas->text_alignment);     */
-/*    canvas->cxTextOrientation(ctxcanvas, canvas->text_orientation); */
-    if (canvas->clip_mode == CD_CLIPAREA && canvas->cxClipArea) canvas->cxClipArea(ctxcanvas, canvas->clip_rect.xmin, canvas->clip_rect.xmax, canvas->clip_rect.ymin, canvas->clip_rect.ymax);
-/*    if (canvas->clip_mode == CD_CLIPAREA && canvas->cxFClipArea) canvas->cxFClipArea(ctxcanvas, canvas->clip_frect.xmin, canvas->clip_frect.xmax, canvas->clip_frect.ymin, canvas->clip_frect.ymax); */
-    if (canvas->clip_mode == CD_CLIPPOLYGON && canvas->clip_poly) canvas->cxPoly(ctxcanvas, CD_CLIP, canvas->clip_poly, canvas->clip_poly_n);
-/*    if (canvas->clip_mode == CD_CLIPPOLYGON && canvas->clip_fpoly) canvas->cxFPoly(ctxcanvas, CD_CLIP, canvas->clip_fpoly, canvas->clip_poly_n); */
-    if (canvas->clip_mode != CD_CLIPOFF) canvas->cxClip(ctxcanvas, canvas->clip_mode);
+    cdUpdateAttributes(canvas);
   }
 
   return CD_OK;
diff --git a/src/cairo/cdcaironative_gdk.c b/src/cairo/cdcaironative_gdk.c
index e233ed6..143efaf 100644
--- a/src/cairo/cdcaironative_gdk.c
+++ b/src/cairo/cdcaironative_gdk.c
@@ -31,6 +31,7 @@ int cdactivate(cdCtxCanvas *ctxcanvas)
 
   if (old_w != canvas->w || old_h != canvas->h)
   {
+    /* Re-create the context so internal size is updated. */
     cairo_destroy(ctxcanvas->cr);
     ctxcanvas->cr = gdk_cairo_create(ctxcanvas->drawable);
 
diff --git a/src/cd.c b/src/cd.c
index 13d2541..ea3effd 100644
--- a/src/cd.c
+++ b/src/cd.c
@@ -93,23 +93,39 @@ static void cd_setdefaultattrib(cdCanvas* canvas)
   /* o resto recebeu zero no memset */
 }
 
-static void cd_updatedefaultattrib(cdCanvas* canvas)
+void cdUpdateAttributes(cdCanvas* canvas)
 {
-  cdCanvasActivate(canvas);
+  cdCtxCanvas* ctxcanvas = canvas->ctxcanvas;
+
+  if (canvas->cxBackground) canvas->cxBackground(ctxcanvas, canvas->background);
+  if (canvas->cxForeground) canvas->cxForeground(ctxcanvas, canvas->foreground);
+  if (canvas->cxBackOpacity) canvas->cxBackOpacity(ctxcanvas, canvas->back_opacity);
+  if (canvas->cxWriteMode) canvas->cxWriteMode(ctxcanvas, canvas->write_mode);
+
+  if (canvas->cxLineStyle) canvas->cxLineStyle(ctxcanvas, canvas->line_style);
+  if (canvas->cxLineWidth) canvas->cxLineWidth(ctxcanvas, canvas->line_width);
+  if (canvas->cxLineCap) canvas->cxLineCap(ctxcanvas, canvas->line_cap);
+  if (canvas->cxLineJoin) canvas->cxLineJoin(ctxcanvas, canvas->line_join);
+
+  if (canvas->cxHatch) canvas->cxHatch(ctxcanvas, canvas->hatch_style);
+  if (canvas->stipple && canvas->cxStipple) canvas->cxStipple(ctxcanvas, canvas->stipple_w, canvas->stipple_h, canvas->stipple);
+  if (canvas->pattern && canvas->cxPattern) canvas->cxPattern(ctxcanvas, canvas->pattern_w, canvas->pattern_h, canvas->pattern);
+  if (canvas->cxInteriorStyle) canvas->cxInteriorStyle(ctxcanvas, canvas->interior_style);
 
-  if (canvas->cxBackground) canvas->cxBackground(canvas->ctxcanvas, canvas->background);
-  if (canvas->cxForeground) canvas->cxForeground(canvas->ctxcanvas, canvas->foreground);
-  if (canvas->cxBackOpacity) canvas->cxBackOpacity(canvas->ctxcanvas, canvas->back_opacity);
-  if (canvas->cxWriteMode) canvas->cxWriteMode(canvas->ctxcanvas, canvas->write_mode);
-  if (canvas->cxLineStyle) canvas->cxLineStyle(canvas->ctxcanvas, canvas->line_style);
-  if (canvas->cxLineWidth) canvas->cxLineWidth(canvas->ctxcanvas, canvas->line_width);
-  if (canvas->cxLineCap) canvas->cxLineCap(canvas->ctxcanvas, canvas->line_cap);
-  if (canvas->cxLineJoin) canvas->cxLineJoin(canvas->ctxcanvas, canvas->line_join);
-  if (canvas->cxHatch) canvas->cxHatch(canvas->ctxcanvas, canvas->hatch_style);
-  if (canvas->cxInteriorStyle) canvas->cxInteriorStyle(canvas->ctxcanvas, canvas->interior_style);
-  if (canvas->cxFont) canvas->cxFont(canvas->ctxcanvas, canvas->font_type_face, canvas->font_style, canvas->font_size);
-  if (canvas->cxTextAlignment) canvas->cxTextAlignment(canvas->ctxcanvas, canvas->text_alignment);
-  if (canvas->cxTextOrientation) canvas->cxTextOrientation(canvas->ctxcanvas, canvas->text_orientation);
+  if (canvas->native_font[0] && canvas->cxNativeFont)
+    canvas->cxNativeFont(ctxcanvas, canvas->native_font);
+  else if (canvas->cxFont) 
+    canvas->cxFont(ctxcanvas, canvas->font_type_face, canvas->font_style, canvas->font_size);
+  if (canvas->cxTextAlignment) canvas->cxTextAlignment(ctxcanvas, canvas->text_alignment);
+  if (canvas->cxTextOrientation) canvas->cxTextOrientation(ctxcanvas, canvas->text_orientation);
+
+  if (canvas->use_matrix && canvas->cxTransform) canvas->cxTransform(ctxcanvas, canvas->matrix);
+
+  if (canvas->clip_mode == CD_CLIPAREA && canvas->cxClipArea) canvas->cxClipArea(ctxcanvas, canvas->clip_rect.xmin, canvas->clip_rect.xmax, canvas->clip_rect.ymin, canvas->clip_rect.ymax);
+  if (canvas->clip_mode == CD_CLIPAREA && canvas->cxFClipArea) canvas->cxFClipArea(ctxcanvas, canvas->clip_frect.xmin, canvas->clip_frect.xmax, canvas->clip_frect.ymin, canvas->clip_frect.ymax);
+  if (canvas->clip_mode == CD_CLIPPOLYGON && canvas->clip_poly) canvas->cxPoly(ctxcanvas, CD_CLIP, canvas->clip_poly, canvas->clip_poly_n);
+  if (canvas->clip_mode == CD_CLIPPOLYGON && canvas->clip_fpoly) canvas->cxFPoly(ctxcanvas, CD_CLIP, canvas->clip_fpoly, canvas->clip_poly_n);
+  if (canvas->clip_mode != CD_CLIPOFF && canvas->cxClip) canvas->cxClip(ctxcanvas, canvas->clip_mode);
 }
 
 cdCanvas* cdCreateCanvasf(cdContext *context, const char* format, ...)
@@ -172,7 +188,8 @@ cdCanvas *cdCreateCanvas(cdContext* context, void *data_str)
   context->cxInitTable(canvas);
 
   /* update the default atributes, must be after InitTable */
-  cd_updatedefaultattrib(canvas);
+  cdCanvasActivate(canvas);
+  cdUpdateAttributes(canvas);
 
   /* must be after creating the canvas, so that we know canvas width and height */
   canvas->clip_rect.xmax = canvas->w-1;
diff --git a/src/cd.def b/src/cd.def
index e3802b2..d1b1334 100644
--- a/src/cd.def
+++ b/src/cd.def
@@ -49,6 +49,7 @@ EXPORTS
   cdSetfAttribute
   cdGetAttribute
   cdRegisterAttribute
+  cdUpdateAttributes
   cdReleaseState
 
   cdRegisterCallback
diff --git a/src/cdgdk.def b/src/cdgdk.def
index dba219a..6489315 100644
--- a/src/cdgdk.def
+++ b/src/cdgdk.def
@@ -49,6 +49,7 @@ EXPORTS
   cdSetfAttribute
   cdGetAttribute
   cdRegisterAttribute
+  cdUpdateAttributes
   cdReleaseState
 
   cdRegisterCallback
diff --git a/src/drv/cdirgb.c b/src/drv/cdirgb.c
index d9dd6a8..fa45f97 100644
--- a/src/drv/cdirgb.c
+++ b/src/drv/cdirgb.c
@@ -1908,7 +1908,7 @@ static void cdcreatecanvasDB(cdCanvas* canvas, cdCanvas* canvas_dbuffer)
 {
   char rgbdata[100];
   sprintf(rgbdata, "%dx%d -r%g", canvas_dbuffer->w, canvas_dbuffer->h, canvas_dbuffer->xres);
-  cdcreatecanvas(canvas, rgbdata);
+  cdcreatecanvas(canvas, rgbdata);  /* the double buffer image will be internally allocated as the canvas RGB image itself */
   if (canvas->ctxcanvas)
     canvas->ctxcanvas->canvas_dbuffer = canvas_dbuffer;
 }
@@ -1941,34 +1941,12 @@ static int cdactivateDB(cdCtxCanvas *ctxcanvas)
     }
 
     /* remove the old image and canvas */
-    cdkillcanvas(old_ctxcanvas);
+    cdkillcanvas(old_ctxcanvas);  /* the double buffer image is the canvas itself */
 
     ctxcanvas = canvas->ctxcanvas;
 
     /* update canvas attributes */
-    if (canvas->cxBackground) canvas->cxBackground(ctxcanvas, canvas->background);
-    if (canvas->cxForeground) canvas->cxForeground(ctxcanvas, canvas->foreground);
-    if (canvas->cxBackOpacity) canvas->cxBackOpacity(ctxcanvas, canvas->back_opacity);
-    if (canvas->cxWriteMode) canvas->cxWriteMode(ctxcanvas, canvas->write_mode);
-    if (canvas->cxLineStyle) canvas->cxLineStyle(ctxcanvas, canvas->line_style);
-    if (canvas->cxLineWidth) canvas->cxLineWidth(ctxcanvas, canvas->line_width);
-    if (canvas->cxLineCap) canvas->cxLineCap(ctxcanvas, canvas->line_cap);
-    if (canvas->cxLineJoin) canvas->cxLineJoin(ctxcanvas, canvas->line_join);
-    if (canvas->cxHatch) canvas->cxHatch(ctxcanvas, canvas->hatch_style);
-    if (canvas->stipple && canvas->cxStipple) canvas->cxStipple(ctxcanvas, canvas->stipple_w, canvas->stipple_h, canvas->stipple);
-    if (canvas->pattern && canvas->cxPattern) canvas->cxPattern(ctxcanvas, canvas->pattern_w, canvas->pattern_h, canvas->pattern);
-    if (canvas->cxInteriorStyle) canvas->cxInteriorStyle(ctxcanvas, canvas->interior_style);
-    if (canvas->native_font[0] && canvas->cxNativeFont)
-      canvas->cxNativeFont(ctxcanvas, canvas->native_font);
-    else if (canvas->cxFont) canvas->cxFont(ctxcanvas, canvas->font_type_face, canvas->font_style, canvas->font_size);
-    if (canvas->cxTextAlignment) canvas->cxTextAlignment(ctxcanvas, canvas->text_alignment);
-    if (canvas->cxTextOrientation) canvas->cxTextOrientation(ctxcanvas, canvas->text_orientation);
-    if (canvas->use_matrix && canvas->cxTransform) canvas->cxTransform(ctxcanvas, canvas->matrix);
-    if (canvas->clip_mode == CD_CLIPAREA && canvas->cxClipArea) canvas->cxClipArea(ctxcanvas, canvas->clip_rect.xmin, canvas->clip_rect.xmax, canvas->clip_rect.ymin, canvas->clip_rect.ymax);
-    if (canvas->clip_mode == CD_CLIPAREA && canvas->cxFClipArea) canvas->cxFClipArea(ctxcanvas, canvas->clip_frect.xmin, canvas->clip_frect.xmax, canvas->clip_frect.ymin, canvas->clip_frect.ymax);
-    if (canvas->clip_mode == CD_CLIPPOLYGON && canvas->clip_poly) canvas->cxPoly(ctxcanvas, CD_CLIP, canvas->clip_poly, canvas->clip_poly_n);
-    if (canvas->clip_mode == CD_CLIPPOLYGON && canvas->clip_fpoly) canvas->cxFPoly(ctxcanvas, CD_CLIP, canvas->clip_fpoly, canvas->clip_poly_n);
-    if (canvas->clip_mode != CD_CLIPOFF && canvas->cxClip) canvas->cxClip(ctxcanvas, canvas->clip_mode);
+    cdUpdateAttributes(canvas);
   }
 
   return CD_OK;
diff --git a/src/gdk/cdgdkdbuf.c b/src/gdk/cdgdkdbuf.c
index 9a8854a..50a93a5 100644
--- a/src/gdk/cdgdkdbuf.c
+++ b/src/gdk/cdgdkdbuf.c
@@ -109,26 +109,7 @@ static int cdactivate(cdCtxCanvas* ctxcanvas)
     ctxcanvas = canvas->ctxcanvas;
 
     /* update canvas attributes */
-    canvas->cxBackground(ctxcanvas, canvas->background);
-    canvas->cxForeground(ctxcanvas, canvas->foreground);
-    canvas->cxBackOpacity(ctxcanvas, canvas->back_opacity);
-    canvas->cxWriteMode(ctxcanvas, canvas->write_mode);
-    canvas->cxLineStyle(ctxcanvas, canvas->line_style);
-    canvas->cxLineWidth(ctxcanvas, canvas->line_width);
-    canvas->cxLineCap(ctxcanvas, canvas->line_cap);
-    canvas->cxLineJoin(ctxcanvas, canvas->line_join);
-    canvas->cxHatch(ctxcanvas, canvas->hatch_style);
-    if (canvas->stipple) canvas->cxStipple(ctxcanvas, canvas->stipple_w, canvas->stipple_h, canvas->stipple);
-    if (canvas->pattern) canvas->cxPattern(ctxcanvas, canvas->pattern_w, canvas->pattern_h, canvas->pattern);
-    canvas->cxInteriorStyle(ctxcanvas, canvas->interior_style);
-    canvas->cxFont(ctxcanvas, canvas->font_type_face, canvas->font_style, canvas->font_size);
-/*    canvas->cxTextAlignment(ctxcanvas, canvas->text_alignment);     */
-/*    canvas->cxTextOrientation(ctxcanvas, canvas->text_orientation); */
-    if (canvas->clip_mode == CD_CLIPAREA && canvas->cxClipArea) canvas->cxClipArea(ctxcanvas, canvas->clip_rect.xmin, canvas->clip_rect.xmax, canvas->clip_rect.ymin, canvas->clip_rect.ymax);
-/*    if (canvas->clip_mode == CD_CLIPAREA && canvas->cxFClipArea) canvas->cxFClipArea(ctxcanvas, canvas->clip_frect.xmin, canvas->clip_frect.xmax, canvas->clip_frect.ymin, canvas->clip_frect.ymax); */
-    if (canvas->clip_mode == CD_CLIPPOLYGON && canvas->clip_poly) canvas->cxPoly(ctxcanvas, CD_CLIP, canvas->clip_poly, canvas->clip_poly_n);
-/*    if (canvas->clip_mode == CD_CLIPPOLYGON && canvas->clip_fpoly) canvas->cxFPoly(ctxcanvas, CD_CLIP, canvas->clip_fpoly, canvas->clip_poly_n); */
-    if (canvas->clip_mode != CD_CLIPOFF) canvas->cxClip(ctxcanvas, canvas->clip_mode);
+    cdUpdateAttributes(canvas);
   }
 
   return CD_OK;
diff --git a/src/win32/cdwdbuf.c b/src/win32/cdwdbuf.c
index 4beac10..9d79e9b 100644
--- a/src/win32/cdwdbuf.c
+++ b/src/win32/cdwdbuf.c
@@ -114,35 +114,14 @@ static int cdactivate(cdCtxCanvas *ctxcanvas)
     }
 
     /* remove the old image and canvas */
-    cdKillImage(old_image_dbuffer);
-    cdwKillCanvas(old_ctxcanvas);
+    cdwKillCanvas(old_ctxcanvas);  /* ctxcanvas e ctxcanvas->hDC released in each driver */
+    cdKillImage(old_image_dbuffer); /* the ctxcanvas->hDC is released here, so do it after the cdwKillCanvas */
     free(old_ctxcanvas);
 
     ctxcanvas = canvas->ctxcanvas;
 
     /* update canvas attributes */
-    canvas->cxBackground(ctxcanvas, canvas->background);
-    canvas->cxForeground(ctxcanvas, canvas->foreground);
-    canvas->cxBackOpacity(ctxcanvas, canvas->back_opacity);
-    canvas->cxWriteMode(ctxcanvas, canvas->write_mode);
-    canvas->cxLineStyle(ctxcanvas, canvas->line_style);
-    canvas->cxLineWidth(ctxcanvas, canvas->line_width);
-    canvas->cxLineCap(ctxcanvas, canvas->line_cap);
-    canvas->cxLineJoin(ctxcanvas, canvas->line_join);
-    canvas->cxHatch(ctxcanvas, canvas->hatch_style);
-    if (canvas->stipple) canvas->cxStipple(ctxcanvas, canvas->stipple_w, canvas->stipple_h, canvas->stipple);
-    if (canvas->pattern) canvas->cxPattern(ctxcanvas, canvas->pattern_w, canvas->pattern_h, canvas->pattern);
-    canvas->cxInteriorStyle(ctxcanvas, canvas->interior_style);
-    if (canvas->native_font[0] == 0) canvas->cxFont(ctxcanvas, canvas->font_type_face, canvas->font_style, canvas->font_size);
-    else canvas->cxNativeFont(ctxcanvas, canvas->native_font);
-    canvas->cxTextAlignment(ctxcanvas, canvas->text_alignment);
-    canvas->cxTextOrientation(ctxcanvas, canvas->text_orientation);
-    if (canvas->use_matrix && canvas->cxTransform) canvas->cxTransform(ctxcanvas, canvas->matrix);
-    if (canvas->clip_mode == CD_CLIPAREA && canvas->cxClipArea) canvas->cxClipArea(ctxcanvas, canvas->clip_rect.xmin, canvas->clip_rect.xmax, canvas->clip_rect.ymin, canvas->clip_rect.ymax);
-/*    if (canvas->clip_mode == CD_CLIPAREA && canvas->cxFClipArea) canvas->cxFClipArea(ctxcanvas, canvas->clip_frect.xmin, canvas->clip_frect.xmax, canvas->clip_frect.ymin, canvas->clip_frect.ymax); */
-    if (canvas->clip_mode == CD_CLIPPOLYGON && canvas->clip_poly) canvas->cxPoly(ctxcanvas, CD_CLIP, canvas->clip_poly, canvas->clip_poly_n);
-/*    if (canvas->clip_mode == CD_CLIPPOLYGON && canvas->clip_fpoly) canvas->cxFPoly(ctxcanvas, CD_CLIP, canvas->clip_fpoly, canvas->clip_poly_n); */
-    if (canvas->clip_mode != CD_CLIPOFF) canvas->cxClip(ctxcanvas, canvas->clip_mode);
+    cdUpdateAttributes(canvas);
   }
 
   return CD_OK;
diff --git a/src/x11/cdxdbuf.c b/src/x11/cdxdbuf.c
index 0f4955e..29d1e4e 100644
--- a/src/x11/cdxdbuf.c
+++ b/src/x11/cdxdbuf.c
@@ -108,27 +108,7 @@ static int cdactivate(cdCtxCanvas* ctxcanvas)
     ctxcanvas = canvas->ctxcanvas;
 
     /* update canvas attributes */
-    canvas->cxBackground(ctxcanvas, canvas->background);
-    canvas->cxForeground(ctxcanvas, canvas->foreground);
-    canvas->cxBackOpacity(ctxcanvas, canvas->back_opacity);
-    canvas->cxWriteMode(ctxcanvas, canvas->write_mode);
-    canvas->cxLineStyle(ctxcanvas, canvas->line_style);
-    canvas->cxLineWidth(ctxcanvas, canvas->line_width);
-    canvas->cxLineCap(ctxcanvas, canvas->line_cap);
-    canvas->cxLineJoin(ctxcanvas, canvas->line_join);
-    canvas->cxHatch(ctxcanvas, canvas->hatch_style);
-    if (canvas->stipple) canvas->cxStipple(ctxcanvas, canvas->stipple_w, canvas->stipple_h, canvas->stipple);
-    if (canvas->pattern) canvas->cxPattern(ctxcanvas, canvas->pattern_w, canvas->pattern_h, canvas->pattern);
-    canvas->cxInteriorStyle(ctxcanvas, canvas->interior_style);
-    if (canvas->native_font[0] == 0) canvas->cxFont(ctxcanvas, canvas->font_type_face, canvas->font_style, canvas->font_size);
-    else canvas->cxNativeFont(ctxcanvas, canvas->native_font);
-/*    canvas->cxTextAlignment(ctxcanvas, canvas->text_alignment);     */
-/*    canvas->cxTextOrientation(ctxcanvas, canvas->text_orientation); */
-    if (canvas->clip_mode == CD_CLIPAREA && canvas->cxClipArea) canvas->cxClipArea(ctxcanvas, canvas->clip_rect.xmin, canvas->clip_rect.xmax, canvas->clip_rect.ymin, canvas->clip_rect.ymax);
-/*    if (canvas->clip_mode == CD_CLIPAREA && canvas->cxFClipArea) canvas->cxFClipArea(ctxcanvas, canvas->clip_frect.xmin, canvas->clip_frect.xmax, canvas->clip_frect.ymin, canvas->clip_frect.ymax); */
-    if (canvas->clip_mode == CD_CLIPPOLYGON && canvas->clip_poly) canvas->cxPoly(ctxcanvas, CD_CLIP, canvas->clip_poly, canvas->clip_poly_n);
-/*    if (canvas->clip_mode == CD_CLIPPOLYGON && canvas->clip_fpoly) canvas->cxFPoly(ctxcanvas, CD_CLIP, canvas->clip_fpoly, canvas->clip_poly_n); */
-    if (canvas->clip_mode != CD_CLIPOFF) canvas->cxClip(ctxcanvas, canvas->clip_mode);
+    cdUpdateAttributes(canvas);
   }
 
   return CD_OK;
-- 
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