WebSVN – HelenOS-historic – Diff – //uspace/trunk/fb/ega.c

  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
+#include <stdlib.h>
+#include <unistd.h>
 #include <align.h>
 #include <async.h>
 #include <ipc/ipc.h>
 #include <errno.h>
 #include <stdio.h>
 #include "ega.h"
 #include "../console/screenbuffer.h"
 #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
 #define EGA_IO_SIZE 2
 typedef unsigned char u8;
 static unsigned int scr_width;
 static unsigned int scr_height;
 static char *scr_addr;
-static unsigned int style = 0x0f;
+static unsigned int style = 0x1e;
 static inline void outb(u16 port, u8 b)
+{
     asm volatile ("outb %0, %1\n" :: "a" (b), "d" (port));
+}
         scr_addr[i*2] = ' ';
         scr_addr[i*2+1] = style;
+    }
+}
-void cursor_goto(unsigned int row, unsigned int col)
+static void cursor_goto(unsigned int row, unsigned int col)
+{
     int ega_cursor;
     ega_cursor=col+scr_width*row;
     outb(EGA_IO_ADDRESS + 1, (ega_cursor >>8) & 0xff);
     outb(EGA_IO_ADDRESS    , 0xf);
     outb(EGA_IO_ADDRESS + 1, ega_cursor & 0xff);
+}
-void cursor_disable(void)
+static void cursor_disable(void)
+{
     u8 stat;
     outb(EGA_IO_ADDRESS , 0xa);
     stat=inb(EGA_IO_ADDRESS + 1);
     outb(EGA_IO_ADDRESS , 0xa);
     outb(EGA_IO_ADDRESS +1 ,stat | (1<<5) );
+}
-void cursor_enable(void)
+static void cursor_enable(void)
+{
     u8 stat;
     outb(EGA_IO_ADDRESS , 0xa);
     stat=inb(EGA_IO_ADDRESS + 1);
     outb(EGA_IO_ADDRESS , 0xa);
     outb(EGA_IO_ADDRESS +1 ,stat & (~(1<<5)) );
+}
+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)
+{
     scr_addr[(row*scr_width + col)*2] = c;
     scr_addr[(row*scr_width + col)*2+1] = style;
     int i;
     for (i=0; i < scr_width*scr_height; i++) {
         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)
+{
     int retval;
     ipc_callid_t callid;
     ipc_call_t call;
     char c;
     unsigned int row, col;
     int bgcolor,fgcolor;
     keyfield_t *interbuf = NULL;
     size_t intersize = 0;
+    int i;
     if (client_connected) {
         ipc_answer_fast(iid, ELIMIT, 0,0);
         return;
+    }
                 break;
+            }
             cursor_goto(row,col);
             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))
                 cursor_enable();
             else
                 cursor_disable();
             break;
         case FB_SET_STYLE:
             fgcolor = IPC_GET_ARG1(call);
             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;
+        }
         ipc_answer_fast(callid,retval,0,0);
+    }
     map_physmem(ega_ph_addr, scr_addr, ALIGN_UP(sz,PAGE_SIZE)>>PAGE_WIDTH,
             AS_AREA_READ | AS_AREA_WRITE);
     async_set_client_connection(ega_client_connection);
-    clrscr();
     return 0;
+}

Subversion Repositories HelenOS-historic

(root)//uspace/trunk/fb/ega.c – Rev 1551 → 1562