From 347ac211c9bb0365d8a5c3a1b943cbd2856c4df3 Mon Sep 17 00:00:00 2001
From: reinelt <reinelt@3ae390bd-cb1e-0410-b409-cd5a39f66f1f>
Date: Wed, 18 Feb 2004 06:39:20 +0000
Subject: [lcd4linux @ 2004-02-18 06:39:20 by reinelt] T6963 driver for graphic
 displays finished

git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@371 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
---
 drv_T6963.c | 106 +++++++++++++++++++++++++++++++++++++++++-------------------
 1 file changed, 73 insertions(+), 33 deletions(-)

(limited to 'drv_T6963.c')

diff --git a/drv_T6963.c b/drv_T6963.c
index 2706805..5a0e6a7 100644
--- a/drv_T6963.c
+++ b/drv_T6963.c
@@ -1,4 +1,4 @@
-/* $Id: drv_T6963.c,v 1.1 2004/02/15 21:43:43 reinelt Exp $
+/* $Id: drv_T6963.c,v 1.2 2004/02/18 06:39:20 reinelt Exp $
  *
  * new style driver for T6963-based displays
  *
@@ -23,6 +23,9 @@
  *
  *
  * $Log: drv_T6963.c,v $
+ * Revision 1.2  2004/02/18 06:39:20  reinelt
+ * T6963 driver for graphic displays finished
+ *
  * Revision 1.1  2004/02/15 21:43:43  reinelt
  * T6963 driver nearly finished
  * framework for graphic displays done
@@ -81,6 +84,8 @@ static unsigned char SIGNAL_CD;
 static unsigned char SIGNAL_RD;
 static unsigned char SIGNAL_WR;
 
+unsigned char *Buffer1, *Buffer2;
+
 // Fixme:
 static int bug=0;
 
@@ -261,14 +266,14 @@ static void drv_T6_send_word (unsigned char cmd, unsigned short data)
 }
 
 
-static void drv_T6_memset(unsigned short addr, unsigned char data, int len)
+static void drv_T6_clear(unsigned short addr, int len)
 {
   int i;
   
   drv_T6_send_word (0x24, addr);      // Set Adress Pointer
   drv_T6_write_cmd(0xb0);             // Set Data Auto Write
   for (i=0; i<len; i++) {
-    drv_T6_write_auto(data);
+    drv_T6_write_auto(0);
     if (bug) {
       bug=0;
       debug("bug occured at byte %d of %d", i, len);
@@ -279,7 +284,7 @@ static void drv_T6_memset(unsigned short addr, unsigned char data, int len)
 }
 
 
-static void drv_T6_memcpy(unsigned short addr, unsigned char *data, int len)
+static void drv_T6_copy(unsigned short addr, unsigned char *data, int len)
 {
   int i;
   
@@ -293,14 +298,51 @@ static void drv_T6_memcpy(unsigned short addr, unsigned char *data, int len)
     }
   }
   drv_T6_status2();
-  drv_T6_write_cmd(0xb2);                // Auto Reset
+  drv_T6_write_cmd(0xb2);  // Auto Reset
 }
 
 
+static void drv_T6_blit(int row, int col, int height, int width)
+{
+  int i, j, e, m;
+  int r, c;
+
+  for (r=row; r<row+height; r++) {
+    for (c=col; c<col+width; c++) {
+      unsigned char mask = 1<<(XRES-1-c%XRES);
+      //if (c<8) debug ("c=%d c%%XRES=%d mask=%d", c, c%XRES, mask); 
+      if (drv_generic_graphic_FB[r*LCOLS+c]) {
+	// set bit
+	Buffer1[(r*DCOLS+c)/XRES] |=  mask;
+      } else {
+	// clear bit
+	Buffer1[(r*DCOLS+c)/XRES] &= ~mask;
+      }
+    }
+  }
+  
+  // max address
+  m=((row+height)*DCOLS+col+width)/XRES;
+  
+  for (i=(row*DCOLS+col)/XRES; i<=m; i++) {
+    if (Buffer1[i]==Buffer2[i]) continue;
+    for (j=i, e=0; i<=m; i++) {
+      if (Buffer1[i]==Buffer2[i]) {
+	if (++e>4) break;
+      } else {
+	e=0;
+      }
+    }
+    memcpy (Buffer2+j, Buffer1+j, i-j-e+1);
+    drv_T6_copy (j, Buffer1+j, i-j-e+1);
+    // sleep (1);
+  }
+}
+
 static int drv_T6_start (char *section)
 {
   char *model, *s;
-  int rows, cols;
+  int rows, TROWS, TCOLS;
   
   model=cfg_get(section, "Model", "generic");
   if (model!=NULL && *model!='\0') {
@@ -319,6 +361,7 @@ static int drv_T6_start (char *section)
     return -1;
   }
 
+  // read display size from config
   s=cfg_get(section, "Size", NULL);
   if (s==NULL || *s=='\0') {
     error ("%s: no '%s.Size' entry from %s", Name, section, cfg_source());
@@ -332,19 +375,25 @@ static int drv_T6_start (char *section)
     return -1;
   }
   
-  s=cfg_get(section, "Font", "6x8");
-  if (s==NULL || *s=='\0') {
-    error ("%s: no '%s.Font' entry from %s", Name, section, cfg_source());
+  TROWS=DROWS/8;  // text rows, assume 6x8 font
+  TCOLS=DCOLS/6;  // text cols, assume 6x8 font
+
+  Buffer1=malloc(DCOLS*TROWS);
+  if (Buffer1==NULL) {
+    error ("%s: framebuffer #1 could not be allocated: malloc() failed", Name);
     return -1;
   }
 
-  XRES = -1;
-  YRES = -1;
-  if (sscanf(s, "%dx%d", &XRES, &YRES)!=2 || XRES<1 || YRES<1) {
-    error ("%s: bad Font '%s' from %s", Name, s, cfg_source());
+  Buffer2=malloc(DCOLS*TROWS);
+  if (Buffer2==NULL) {
+    error ("%s: framebuffer #2 could not be allocated: malloc() failed", Name);
     return -1;
   }
+
+  memset(Buffer1,0,TCOLS*DROWS*sizeof(*Buffer1));
+  memset(Buffer2,0,TCOLS*DROWS*sizeof(*Buffer2));
   
+
   if (drv_generic_parport_open(section, Name) != 0) {
     error ("%s: could not initialize parallel port!", Name);
     return -1;
@@ -362,15 +411,12 @@ static int drv_T6_start (char *section)
   drv_generic_parport_direction (0);
   
   // initialize display
-  
-  rows=DROWS/8; // text rows, assume 6x8 font
-  cols=DCOLS/6; // text cols, assume 6x8 font
 
   drv_T6_send_word (0x40, 0x0000);    // Set Text Home Address
-  drv_T6_send_word (0x41, cols);      // Set Text Area
+  drv_T6_send_word (0x41, TCOLS);     // Set Text Area
   
   drv_T6_send_word (0x42, 0x0200);    // Set Graphic Home Address
-  drv_T6_send_word (0x43, cols);      // Set Graphic Area
+  drv_T6_send_word (0x43, TCOLS);     // Set Graphic Area
   
   drv_T6_write_cmd (0x80);            // Mode Set: OR mode, Internal CG RAM mode
   drv_T6_send_word (0x22, 0x0002);    // Set Offset Register
@@ -382,17 +428,17 @@ static int drv_T6_start (char *section)
   // clear display
   
   // upper half
-  if (rows>8) rows=8;
-  drv_T6_memset(0x0000, 0, cols*rows);    // clear text area 
-  drv_T6_memset(0x0200, 0, cols*rows*8);  // clear graphic area
+  rows=TROWS>8?8:TROWS;
+  drv_T6_clear(0x0000, TCOLS*rows);    // clear text area 
+  drv_T6_clear(0x0200, TCOLS*rows*8);  // clear graphic area
   
   // lower half
-  if (DROWS>8*8) {
-    rows=DROWS/8-8;
-    drv_T6_memset(0x8000, 0, cols*rows);    // clear text area #2
-    drv_T6_memset(0x8200, 0, cols*rows*8);  // clear graphic area #2
+  if (TROWS>8) {
+    rows=TROWS-8;
+    drv_T6_clear(0x8000, TCOLS*rows);    // clear text area #2
+    drv_T6_clear(0x8200, TCOLS*rows*8);  // clear graphic area #2
   }
-  
+
   return 0;
 }
 
@@ -437,14 +483,8 @@ int drv_T6_init (char *section)
   WIDGET_CLASS wc;
   int ret;  
   
-  // display preferences
-  GOTO_COST = 2;  // number of bytes a goto command requires
-  
   // real worker functions
-  // Fixme: which one?
-  // drv_generic_text_real_write   = drv_T6_write;
-  // drv_generic_text_real_goto    = drv_T6_goto;
-  // drv_generic_text_real_defchar = drv_T6_defchar;
+  drv_generic_graphic_real_blit   = drv_T6_blit;
   
   // start display
   if ((ret=drv_T6_start (section))!=0)
-- 
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