From 045a1ac38596ed939aab96967ba2138144c60ee8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C2=A8Rene=20Richarz?= <rricharz77@gmail.com>
Date: Fri, 26 Apr 2019 16:29:39 +0200
Subject: [PATCH] GIN mode added and tested

---
 main.c       |  10 +++++--
 main.h       |   1 +
 tek4010      | Bin 40816 -> 45328 bytes
 tek4010.c    |  78 +++++++++++++++++++++++++++++++++++++++++++++------
 tube.c       |  22 +++++++++++++--
 tube.h       |   2 ++
 versions.txt |   5 ++++
 7 files changed, 106 insertions(+), 12 deletions(-)

diff --git a/main.c b/main.c
index da15b86..c720c43 100644
--- a/main.c
+++ b/main.c
@@ -45,6 +45,7 @@
 #include <gtk/gtk.h>
 
 #include "main.h"
+#include "tube.h"
 
 extern FILE *putKeys;
 
@@ -156,7 +157,7 @@ static void do_drawing(cairo_t *cr, GtkWidget *widget)
 static void on_key_press(GtkWidget *widget, GdkEventKey *event, gpointer user_data)
 {
         int ch;
-        // printf("key pressed, state =%04X, keyval=%04X\r\n", event->state, event->keyval);
+        // printf("key pressed, state =%04X, keyval=%04X, isGinMode = %d\r\n", event->state, event->keyval, isGinMode);
         
         if ((event->keyval == 0xFF50) ||        // "home" key
                 (event->keyval == 0xFF55) ||    // "page up" key
@@ -196,8 +197,13 @@ static void on_key_press(GtkWidget *widget, GdkEventKey *event, gpointer user_da
                 ch = event->keyval & 0x7F;
                 
         else return;
+        
+        if (isGinMode) { // need to pass key to GIN mode handling, not to child process
+                isGinMode = ch;
+                gtk_widget_queue_draw(widget);
+        }
                 
-        if (putKeys)
+        else if (putKeys)
                 putc(ch,putKeys);      // pipe key to child process, if stream open
 }
 
diff --git a/main.h b/main.h
index 4ecb85a..89bdcf1 100644
--- a/main.h
+++ b/main.h
@@ -3,6 +3,7 @@
 
 void tube_init(int argc, char* argv[]);
 void tek4010_draw(cairo_t *cr, cairo_t *cr2, int first);
+void tek4010_clicked(int x, int y);
 int  tube_on_timer_event();
 int  tube_clicked(int button, int x, int y);
 void tube_quit();
diff --git a/tek4010 b/tek4010
index 6bb838e7e1eec9bb747537cc16aa6fea92866926..5d72464acfff347ba79b80b69b24a511db996f23 100755
GIT binary patch
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diff --git a/tek4010.c b/tek4010.c
index aa34fdc..2d01a2d 100755
--- a/tek4010.c
+++ b/tek4010.c
@@ -62,12 +62,14 @@
 //
 // mode 40      incremental plot mode; is ignored until exit from incremental plot received
 // mode 50      special point plot mode; not yet implemented
+// mode 60      crosshair mode
 // mode 101     ignore until group separator
 
 int mode, savemode;
 int penDown = 1;
 
 extern int leftmargin;
+extern FILE *putKeys;
 
 static long startPaintTime;
 static int xh,xl,yh,yl,xy4014;
@@ -105,13 +107,65 @@ void tek4010_checkLimits()
 
 void tek4010_bell()
 {
-        // bell function, delay 0.1 sec
+        // bell function, delay 0.05 sec
         tube_u100ResetSeconds(1);
         usleep(50000);
         showCursor=0;
         todo = 0;
 }
 
+void sendCoordinates()
+{
+        // send 4 coordinate bytes
+        putc((tube_x0 >> 5) + 0xa0,putKeys);
+        putc((tube_x0 & 31) + 0xa0,putKeys);
+        putc((tube_y0 >> 5) + 0xa0,putKeys);
+        putc((tube_y0 & 31) + 0xa0,putKeys);
+}
+
+void enqMode()
+{
+        // activated by sending ESC ENQ
+        int status;
+        status = 0xa0;
+        if (leftmargin == 0) status += 2;
+        if (mode == 0) status += 4;
+        putc(status,putKeys);           // send status byte
+        sendCoordinates();
+        putc(13 + 128, putKeys);        // cr, bit 8 set
+                                        // cannot send a EOT here       
+}
+
+void ginMode(cairo_t *cr, cairo_t *cr2)
+{
+        // activated by sending ESC SUB
+        if (DEBUG) printf("GIN, mode = %d\n", mode);
+        tube_crosshair(cr, cr2);
+        mode = 60;
+        todo = 0;
+        showCursor = 0;
+        isGinMode = 1;
+}
+
+void ginSend(int ch)
+{
+        // user has stoken a key during GIN mode
+        if (DEBUG) printf("ginSend, ch = %d\n", ch);
+        putc(ch + 128,putKeys);
+        sendCoordinates();
+        putc(13+128,putKeys);           // cr, bit 8 set
+                                        // cannot send a EOT here
+}
+
+void tek4010_clicked(int x, int y)
+{
+        if (DEBUG) printf("Clicked, mode = %d\n", mode);
+        if (mode == 60) {
+                tube_x0 = x;
+                tube_y0 = y;
+        }
+}
+
 void tek4010_escapeCodeHandler(cairo_t *cr, cairo_t *cr2, int ch)
 // handle escape sequencies, see 4014 user manual, table page G-1
 // codes identical for all modes are handled elsewhere
@@ -120,8 +174,7 @@ void tek4010_escapeCodeHandler(cairo_t *cr, cairo_t *cr2, int ch)
                 case 0: break; // ignore filler 0
 
                 case 5: // ENQ: ask for status and position
-                        // not yet implemented, needs to send 7 bytes
-                        if (DEBUG) printf("ENQ not supported, ignored\n");
+                        enqMode();
                         mode = 0; break;
                 case 6: break;
                 
@@ -153,8 +206,7 @@ void tek4010_escapeCodeHandler(cairo_t *cr, cairo_t *cr2, int ch)
                 case 23: system("scrot --focussed"); mode= 0; break;
                 
                 case 26: // sub
-                        if (DEBUG) printf("GIN mode not supported, ignored\n");
-                        mode = 0;
+                        ginMode(cr, cr2);
                         break;
                         
                 // modes 27 and 29 - 31 are identical in all modes
@@ -276,7 +328,7 @@ void tek4010_draw(cairo_t *cr, cairo_t *cr2, int first)
                 todo = 4 * TODO;      // for text speed
         else
                 todo = TODO;
-                
+
         do {
                 ch = tube_getInputChar();
                 
@@ -286,7 +338,7 @@ void tek4010_draw(cairo_t *cr, cairo_t *cr2, int first)
 
                 if (ch == -1) {
                         if ((mode == 0) && showCursor) tube_doCursor(cr2);
-                        return;         // no char available, need to allow for updates
+                        if (mode != 60) return;         // no char available, need to allow for updates
                 }
                 
                 if (DEBUG) {
@@ -517,7 +569,17 @@ void tek4010_draw(cairo_t *cr, cairo_t *cr2, int first)
                                 intensity = intensityTable[ch - 32];
                                 if (DEBUG) printf("defocussed = %d, intensity = %d%%\n", defocussed, intensity);
                                 mode = 5; // coordinates follow                                
-                                break;                                
+                                break;
+                        case 60:// crosshair mode
+                                if (isGinMode > 1) { // key stroken by user
+                                        ginSend(isGinMode);
+                                        mode = 0;
+                                        todo = 0;
+                                        isGinMode = 0;
+                                }
+                                else
+                                        ginMode(cr, cr2);
+                                break;
                         case 101: 
                                 if (DEBUG) printf("Ignore until group separator, ch = %02x\n", ch);
                                 if (ch == 29) mode = 1;
diff --git a/tube.c b/tube.c
index 4b0ed70..8782873 100755
--- a/tube.c
+++ b/tube.c
@@ -74,6 +74,7 @@ double dashset[] = {2,6,2,2,6,3,3,3,6,6};
 
 int plotPointMode = 0;           // plot point mode
 int writeThroughMode = 0;        // write through mode
+int isGinMode = 0;                 // set if GIN mode is active
 int tube_doClearPersistent;
 
 int specialPlotMode = 0;
@@ -178,7 +179,7 @@ void tube_init(int argc, char* argv[])
         char *argv2[20];
         size_t bufsize = 127;
         int firstArg = 1;
-        printf("tek4010 version 1.2.5\n");
+        printf("tek4010 version 1.2.6\n");
         windowName = "Tektronix 4010/4014 emulator";
         if ((argc<2) || (argc>19)) {
                 printf("Error:number of arguments\n");
@@ -377,7 +378,12 @@ int tube_clicked(int button, int x, int y)
 // x and y are the coordinates
 // if the function returns 1, the window is redrawn by calling applicatin_draw
 {
-	return 1;
+        if (argARDS) return 0;
+        if (button == 1) {
+                tek4010_clicked(x, y);
+                return 1;
+        }
+	return 0;
 }
 
 void tube_quit()
@@ -534,6 +540,18 @@ void tube_drawPoint(cairo_t *cr, cairo_t *cr2)
         isBrightSpot = 1;      
 }
 
+void tube_crosshair(cairo_t *cr, cairo_t *cr2)
+{
+        // printf("crosshair at %d,%d\n", tube_x0, tube_y0);
+        cairo_set_line_width (cr2, 1);
+        cairo_set_source_rgb(cr2, 0.0, WRITE_TROUGH_INTENSITY, 0.0);
+        cairo_move_to(cr2, tube_x0, 0);
+        cairo_line_to(cr2, tube_x0, windowHeight);
+        cairo_move_to(cr2, 0, tube_y0);
+        cairo_line_to(cr2, windowWidth, tube_y0);
+        cairo_stroke (cr2);        
+}
+
 void tube_drawVector(cairo_t *cr, cairo_t *cr2)
 {
         if (DEBUG) {
diff --git a/tube.h b/tube.h
index 23b695a..c92ccb0 100644
--- a/tube.h
+++ b/tube.h
@@ -19,6 +19,7 @@ extern long refreshCount;
 
 extern int showCursor;                 // set of cursor is shown (not set in graphics mode)
 extern int isBrightSpot;               // set if there is currently a bright spot on the screen
+extern int isGinMode;                    // set if GIN mode is active
 
 extern int specialPlotMode;
 extern int defocussed;
@@ -37,6 +38,7 @@ extern void tube_clearSecond(cairo_t *cr2);
 extern int  tube_isInput();
 extern int  tube_getInputChar();
 extern void tube_emulateDeflectionTime();
+extern void tube_crosshair(cairo_t *cr, cairo_t *cr2);
 extern void tube_drawVector(cairo_t *cr, cairo_t *cr2);
 extern void tube_drawCharacter(cairo_t *cr, cairo_t *cr2, char ch);
 extern void tube_drawPoint(cairo_t *cr, cairo_t *cr2);
diff --git a/versions.txt b/versions.txt
index 5c38312..9ec28f0 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,3 +1,8 @@
+Version 1.2.6 April 26, 2019
+============================
+New features
+- GIN mode added, Tek4014 emulation is now complete
+
 Version 1.2.5 April 19, 2019
 ============================
 Bug fixes