Support Cache Glyph Revison 2, issue #367

5 files changed, 185 insertions, 6 deletions

diff --git a/common/xrdp_client_info.h b/common/xrdp_client_info.h
index e8e91da4..b57b1949 100644
--- a/common/xrdp_client_info.h
+++ b/common/xrdp_client_info.h
@@ -154,6 +154,7 @@ struct xrdp_client_info
   int client_os_minor;
 
   int no_orders_supported;
+  int use_cache_glyph_v2;
 };
 
 #endif
diff --git a/libxrdp/xrdp_caps.c b/libxrdp/xrdp_caps.c
index dddf6d23..46810c18 100644
--- a/libxrdp/xrdp_caps.c
+++ b/libxrdp/xrdp_caps.c
@@ -361,6 +361,33 @@ xrdp_caps_process_brushcache(struct xrdp_rdp *self, struct stream *s,
 }
 
 /*****************************************************************************/
+static int
+xrdp_caps_process_glyphcache(struct xrdp_rdp *self, struct stream *s,
+                             int len)
+{
+    int glyph_support_level;
+
+    if (len < 40 + 4 + 2 + 2)
+    {
+        g_writeln("xrdp_caps_process_glyphcache: error");
+        return 1;
+    }
+
+    in_uint8s(s, 40);  /* glyph cache */
+    in_uint8s(s, 4);   /* frag cache */
+    in_uint16_le(s, glyph_support_level);
+    in_uint8s(s, 2);   /* pad */
+
+    if (self->client_info.use_cache_glyph_v2 && (glyph_support_level != 3))
+    {
+        self->client_info.use_cache_glyph_v2 = 0;
+    }
+    g_writeln("xrdp_caps_process_glyphcache: support level %d ",
+              glyph_support_level);
+    return 0;
+}
+
+/*****************************************************************************/
 int
 xrdp_caps_process_offscreen_bmpcache(struct xrdp_rdp *self, struct stream *s,
                                      int len)
@@ -657,7 +684,8 @@ xrdp_caps_process_confirm_active(struct xrdp_rdp *self, struct stream *s)
                 xrdp_caps_process_brushcache(self, s, len);
                 break;
             case RDP_CAPSET_GLYPHCACHE:
-                DEBUG(("--0x11"));
+                DEBUG(("RDP_CAPSET_GLYPHCACHE"));
+                xrdp_caps_process_glyphcache(self, s, len);
                 break;
             case RDP_CAPSET_OFFSCREENCACHE:
                 DEBUG(("CAPSET_TYPE_OFFSCREEN_CACHE"));
diff --git a/libxrdp/xrdp_orders.c b/libxrdp/xrdp_orders.c
index 52d043c9..5790a675 100644
--- a/libxrdp/xrdp_orders.c
+++ b/libxrdp/xrdp_orders.c
@@ -2444,10 +2444,10 @@ xrdp_orders_send_bitmap(struct xrdp_orders *self,
 /* returns error */
 /* max size datasize + 18*/
 /* todo, only sends one for now */
-int
-xrdp_orders_send_font(struct xrdp_orders *self,
-                      struct xrdp_font_char *font_char,
-                      int font_index, int char_index)
+static int
+xrdp_orders_cache_glyph(struct xrdp_orders *self,
+                        struct xrdp_font_char *font_char,
+                        int font_index, int char_index)
 {
     int order_flags = 0;
     int datasize = 0;
@@ -2488,6 +2488,150 @@ xrdp_orders_send_font(struct xrdp_orders *self,
 
 /*****************************************************************************/
 /* returns error */
+static int write_2byte_signed(struct stream * s, int value)
+{
+    unsigned char byte;
+    int negative = 0;
+
+    if (value < 0)
+    {
+        negative = 1;
+        value *= -1;
+    }
+
+    if (value > 0x3FFF)
+    {
+        return 1;
+    }
+
+    if (value >= 0x3F)
+    {
+        byte = ((value & 0x3F00) >> 8);
+
+        if (negative)
+        {
+            byte |= 0x40;
+        }
+
+        out_uint8(s, byte | 0x80);
+        byte = (value & 0xFF);
+        out_uint8(s, byte);
+    }
+    else
+    {
+        byte = (value & 0x3F);
+
+        if (negative)
+        {
+            byte |= 0x40;
+        }
+
+        out_uint8(s, byte);
+    }
+
+    return 0;
+}
+
+/*****************************************************************************/
+/* returns error */
+static int write_2byte_unsigned(struct stream * s, unsigned int value)
+{
+    unsigned char byte;
+
+    if (value > 0x7FFF)
+    {
+        return 1;
+    }
+
+    if (value >= 0x7F)
+    {
+        byte = ((value & 0x7F00) >> 8);
+        out_uint8(s, byte | 0x80);
+        byte = (value & 0xFF);
+        out_uint8(s, byte);
+    }
+    else
+    {
+        byte = (value & 0x7F);
+        out_uint8(s, byte);
+    }
+
+    return 0;
+}
+
+/*****************************************************************************/
+/* returns error */
+/* max size datasize + 15*/
+/* todo, only sends one for now */
+static int
+xrdp_orders_cache_glyph_v2(struct xrdp_orders *self,
+                           struct xrdp_font_char *font_char,
+                           int font_index, int char_index)
+{
+    int order_flags = 0;
+    int datasize = 0;
+    int len = 0;
+    int extra_flags;
+    char *len_ptr;
+
+    if (font_char->bpp == 8) /* alpha font */
+    {
+        datasize = ((font_char->width + 3) & ~3) * font_char->height;
+    }
+    else
+    {
+        datasize = FONT_DATASIZE(font_char);
+    }
+
+    /* cacheId, flags(GLYPH_ORDER_REV2), cGlyphs */
+    extra_flags = (font_index & 0x000F) | (0x2 << 4) | (1 << 8);
+
+    if (xrdp_orders_check(self, datasize + 15) != 0)
+    {
+        return 1;
+    }
+    self->order_count++;
+    order_flags = RDP_ORDER_STANDARD | RDP_ORDER_SECONDARY;
+    out_uint8(self->out_s, order_flags);
+    len_ptr = self->out_s->p;
+    out_uint16_le(self->out_s, 0);  /* set later */
+    out_uint16_le(self->out_s, extra_flags);
+    out_uint8(self->out_s, RDP_ORDER_FONTCACHE); /* type */
+
+    out_uint8(self->out_s, char_index);
+    if (write_2byte_signed(self->out_s, font_char->offset) ||
+        write_2byte_signed(self->out_s, font_char->baseline) ||
+        write_2byte_unsigned(self->out_s, font_char->width) ||
+        write_2byte_unsigned(self->out_s, font_char->height))
+    {
+        return 1;
+    }
+
+    out_uint8a(self->out_s, font_char->data, datasize);
+    len = (self->out_s->p - len_ptr) + 1 - 13;
+    len_ptr[0] = len & 0xFF;
+    len_ptr[1] = (len >> 8) & 0xFF;
+
+    return 0;
+}
+
+/*****************************************************************************/
+/* returns error */
+int
+xrdp_orders_send_font(struct xrdp_orders *self,
+                      struct xrdp_font_char *font_char,
+                      int font_index, int char_index)
+{
+    if (self->rdp_layer->client_info.use_cache_glyph_v2)
+    {
+        return xrdp_orders_cache_glyph_v2(self, font_char, font_index, char_index);
+    }
+
+    return xrdp_orders_cache_glyph(self, font_char, font_index, char_index);
+}
+
+/*****************************************************************************/
+/* returns error */
 /* max size width * height * Bpp + 14 */
 int
 xrdp_orders_send_raw_bitmap2(struct xrdp_orders *self,
diff --git a/libxrdp/xrdp_rdp.c b/libxrdp/xrdp_rdp.c
index 494d23e8..928c1610 100644
--- a/libxrdp/xrdp_rdp.c
+++ b/libxrdp/xrdp_rdp.c
@@ -269,12 +269,16 @@ xrdp_rdp_read_config(struct xrdp_client_info *client_info)
                 g_strncpy(client_info->key_file, value, 1023);
             }
 
-	    if (!g_file_readable(client_info->key_file))
+            if (!g_file_readable(client_info->key_file))
             {
                 log_message(LOG_LEVEL_ERROR, "Cannot read private key file %s: %s",
                             client_info->key_file, g_get_strerror());
             }
         }
+        else if (g_strcasecmp(item, "use_cache_glyph_v2") == 0)
+        {
+            client_info->use_cache_glyph_v2 = g_text2bool(value);
+        }
 
     }
 
diff --git a/xrdp/xrdp.ini.in b/xrdp/xrdp.ini.in
index c73e271c..0b24012d 100644
--- a/xrdp/xrdp.ini.in
+++ b/xrdp/xrdp.ini.in
@@ -53,6 +53,8 @@ use_fastpath=both
 #require_credentials=true
 ; You can set the PAM error text in a gateway setup (MAX 256 chars)
 #pamerrortxt=change your password according to policy at http://url
+; Cache Glyph Revison 2. default: false
+use_cache_glyph_v2=true
 
 ;
 ; colors used by windows in RGB format