initial support for a display module, incomplete

[dcpu16] / vm-dcpu16.c

diff --git a/vm-dcpu16.c b/vm-dcpu16.c
index 537452af9af8f11066f00dd43aa0eb33961eb00d..1e3a49656757f8e68cd90ebae13a12bd75018ed1 100644 (file)
--- a/vm-dcpu16.c
+++ b/vm-dcpu16.c
@@ -12,6 +12,7 @@
 
 #include "dcpu16.h"
 #include "common.h"
+#include "display.h"
 
 /*
  *  shell-like driver for dcpu16 core
@@ -364,6 +365,45 @@ COMMAND_HELP(run) {
                "May be interrupted with SIGINT.\n");
 }
 
+COMMAND_IMPL(display) {
+    (void)arg_count, (void)arg_vector;
+
+    static DPIX *pixbuf = NULL;
+
+    if (pixbuf) {
+        printf("display already enabled..\n");
+        return 0;
+    }
+
+    pixbuf = display_init_pixbuf();
+    if (pixbuf == NULL) {
+        fprintf(stderr, "failed to initialize display buffer\n");
+        return 0;
+    }
+
+    if (dcpu16_acct_add(vm, DCPU16_ACCT_EV_WRITE, display_fn, pixbuf)) {
+        fprintf(stderr, "failed to register display update callback\n");
+        return 0;
+    }
+
+    if (dcpu16_acct_add(vm, DCPU16_ACCT_EV_RESET, display_reset_fn, pixbuf)) {
+        fprintf(stderr, "failed to register display reset callback\n");
+        return 0;
+    }
+
+    /* init display as if reset occurred */
+    display_reset_fn(vm, DCPU16_ACCT_EV_RESET, 0, pixbuf);
+
+    return 0;
+}
+COMMAND_HELP(display) {
+    fprintf(f, "\tdisplay\n");
+    if (summary) return;
+
+    fprintf(f, "Begins updating a PNM of current display contents...\n"
+               "This is not a fully-baked feature...\n");
+}
+
 /* gather all these together into a searchable table */
 
 /* help command gets some assistance in declarations */
@@ -379,6 +419,7 @@ static struct command_ command_table_[] = {
     COMMAND_ENTRY(step, 0, 1),
     COMMAND_ENTRY(run, 0, 0),
     COMMAND_ENTRY(reset, 0, 0),
+    COMMAND_ENTRY(display, 0, 0),
     { NULL, 0, 0, NULL, NULL }
 };