Changeset 1160f8d in mainline

Timestamp:

2006-06-04T14:31:43Z (19 years ago)

Author:

Jakub Vana <jakub.vana@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

7bc1e74

Parents:

26f48570

Message:

Ega scrolling and screen saving

Location:

fb

Files:

• ega.c (modified) (12 diffs)
• fb.c (modified) (1 diff)

fb/ega.c

@@ -26 +26 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
-
+#include <stdlib.h>
+#include <unistd.h>
 #include <align.h>
 #include <async.h>
@@ -44 +45 @@
 #include "main.h"
 
+#define MAX_SAVED_SCREENS 256
+typedef struct saved_screen {
+        short *data;
+} saved_screen;
+
+saved_screen saved_screens[MAX_SAVED_SCREENS];
+
 
 #define EGA_IO_ADDRESS 0x3d4
@@ -60 +68 @@
 static char *scr_addr;
 
-static unsigned int style = 0x0f;
+static unsigned int style = 0x1e;
 
 static inline void outb(u16 port, u8 b)
@@ -114 +122 @@
 }
 
-void cursor_goto(unsigned int row, unsigned int col)
+static void cursor_goto(unsigned int row, unsigned int col)
 {
         int ega_cursor;
@@ -126 +134 @@
 }
 
-void cursor_disable(void)
+static void cursor_disable(void)
 {
         u8 stat;
@@ -135 +143 @@
 }
 
-void cursor_enable(void)
+static void cursor_enable(void)
 {
         u8 stat;
@@ -144 +152 @@
 }
 
+static void scroll(int rows)
+{
+        int i;
+        if (rows > 0) {
+                memcpy(scr_addr,((char *)scr_addr)+rows*scr_width*2,scr_width*scr_height*2-rows*scr_width*2);
+                for(i=0;i<rows*scr_width;i++)
+                        (((short *)scr_addr)+scr_width*scr_height-rows*scr_width)[i]=((style<<8)+' ');
+        } else if (rows < 0) {
+
+                memcpy(((char *)scr_addr)-rows*scr_width*2,scr_addr,scr_width*scr_height*2+rows*scr_width*2);
+                for(i=0;i<-rows*scr_width;i++)
+                        ((short *)scr_addr)[i]=((style<<8)+' ');
+        }
+}
+
 static void printchar(char c, unsigned int row, unsigned int col)
 {
@@ -159 +182 @@
                 scr_addr[i*2] = data[i].character;
                 if (data[i].style.fg_color > data[i].style.bg_color)
-                        scr_addr[i*2+1] = 0x0f;
+                        scr_addr[i*2+1] = 0x1e;
                 else
-                        scr_addr[i*2+1] = 0xf0;
-        }
-}
+                        scr_addr[i*2+1] = 0xe1;
+        }
+}
+
+static int save_screen(void)
+{
+        int i;
+        short *mem;
+        for(i=0;(i<MAX_SAVED_SCREENS)&&(saved_screens[i].data);i++);
+        if(i==MAX_SAVED_SCREENS) return EINVAL;
+        if(!(saved_screens[i].data=malloc(2*scr_width*scr_height))) return ENOMEM;
+        memcpy(saved_screens[i].data,scr_addr,2*scr_width*scr_height);
+        return i;
+}
+
+static int print_screen(int i)
+{
+        if(saved_screens[i].data)
+                        memcpy(scr_addr,saved_screens[i].data,2*scr_width*scr_height);
+        else return EINVAL;
+        return i;
+}
+
 
 static void ega_client_connection(ipc_callid_t iid, ipc_call_t *icall)
@@ -175 +218 @@
         keyfield_t *interbuf = NULL;
         size_t intersize = 0;
+        int i;
 
         if (client_connected) {
@@ -235 +279 @@
                         retval = 0;
                         break;
+                case FB_SCROLL:
+                        i = IPC_GET_ARG1(call);
+                        if (i > scr_height || i < (- (int)scr_height)) {
+                                retval = EINVAL;
+                                break;
+                        }
+                        scroll(i);
+                        retval = 0;
+                        break;
                 case FB_CURSOR_VISIBILITY:
                         if(IPC_GET_ARG1(call))
@@ -246 +299 @@
                         bgcolor = IPC_GET_ARG2(call);
                         if (fgcolor > bgcolor)
-                                style = 0x0f;
+                                style = 0x1e;
                         else
-                                style = 0xf0;
+                                style = 0xe1;
+
+                case FB_VP_DRAW_PIXMAP:
+                        i = IPC_GET_ARG2(call);
+                        retval = print_screen(i);
+                        break;
+                case FB_VP2PIXMAP:
+                        retval = save_screen();
+                        break;
+                case FB_DROP_PIXMAP:
+                        i = IPC_GET_ARG1(call);
+                        if (i >= MAX_SAVED_SCREENS) {
+                                retval = EINVAL;
+                                break;
+                        }
+                        if (saved_screens[i].data) {
+                                free(saved_screens[i].data);
+                                saved_screens[i].data = NULL;
+                        }
+                        break;
+
                 default:
                         retval = ENOENT;
@@ -275 +348 @@
         async_set_client_connection(ega_client_connection);
 
-        clrscr();
-
         return 0;
 }

fb/fb.c

@@ -700 +700 @@
                 memcpy(screen.fbaddress + tmp, pmap->data + y * srcrowsize, realrowsize);
         }
+        return pm;
 }