Finished block copy example wgt09.c

part12-wgt/examples/wgt03.c

@@ -55,108 +55,8 @@ void getch(void) {
 int timer;                /* Counts how many times it has been called */ 
 int clearcount;           /* Counts the number of screen clears. */
 
-int curx = 0;
-int cury = 0;
-
 extern int get_el(void);
 
-void debugstr(char *str) {
-    if (curx + (strlen(str) * 8)  >= 1920) {
-       curx = 0; cury += 8;
-    }
-    if (cury + 8 >= 1080) {
-       cury = 0;
-    }
-    wtextcolor(vgapal[15]);
-    wouttextxy (curx, cury, NULL, str);
-
-    curx += (strlen(str) * 8);
-}
-
-void debugcrlf(void) {
-    curx = 0; cury += 8;
-}
-
-void debugch(unsigned char b) {
-    unsigned int n;
-    int c;
-    for(c=4;c>=0;c-=4) {
-        n=(b>>c)&0xF;
-        n+=n>9?0x37:0x30;
-        debugstr((char *)&n);
-    }
-    debugstr(" ");
-}
-
-void debughex(unsigned int d) {
-    unsigned int n;
-    int c;
-    for(c=28;c>=0;c-=4) {
-        n=(d>>c)&0xF;
-        n+=n>9?0x37:0x30;
-        debugstr((char *)&n);
-    }
-    debugstr(" ");
-}
-
-int get_max_clock()
-{
-    mbox[0] = 8*4; // Length of message in bytes
-    mbox[1] = MBOX_REQUEST;
-    mbox[2] = MBOX_TAG_GETCLKMAXM; // Tag identifier
-    mbox[3] = 8; // Value size in bytes
-    mbox[4] = 0; // Value size in bytes
-    mbox[5] = 0x3; // Value
-    mbox[6] = 0; // Rate
-    mbox[7] = MBOX_TAG_LAST;
-
-    if (mbox_call(MBOX_CH_PROP)) {
-        if (mbox[5] == 0x3) {
-           return mbox[6];
-        }
-    }
-    return 0;
-}
-
-int get_clock_rate()
-{
-    mbox[0] = 8*4; // Length of message in bytes
-    mbox[1] = MBOX_REQUEST;
-    mbox[2] = MBOX_TAG_GETCLKRATE; // Tag identifier
-    mbox[3] = 8; // Value size in bytes
-    mbox[4] = 0; // Value size in bytes
-    mbox[5] = 0x3; // Value
-    mbox[6] = 0; // Rate
-    mbox[7] = MBOX_TAG_LAST;
-
-    if (mbox_call(MBOX_CH_PROP)) {
-        if (mbox[5] == 0x3) {
-           return mbox[6];
-        }
-    }
-    return 0;
-}
-
-int set_clock_rate(unsigned int rate)
-{
-    mbox[0] = 9*4;  // Length of message in bytes
-    mbox[1] = MBOX_REQUEST;
-    mbox[2] = MBOX_TAG_SETCLKRATE; // Tag identifier
-    mbox[3] = 12;   // Value size in bytes
-    mbox[4] = 0;    // Value size in bytes
-    mbox[5] = 0x3;  // Value
-    mbox[6] = rate; // Rate
-    mbox[7] = 0;    // Rate
-    mbox[8] = MBOX_TAG_LAST;
-
-    if (mbox_call(MBOX_CH_PROP)) {
-        if (mbox[5] == 0x3 && mbox[6] == rate) {
-           return 1;
-        }
-    }
-    return 0;
-}
-
 void timer_routine (void)
 {
   timer++;
@@ -185,8 +85,7 @@ void wgt03()
   winittimer ();
   wstarttimer (timer_routine, TIMERSPEED);
 
-  curx = 0;
+  debugreset();
-  cury = 0;
 
   while (!kbhit ())
   {

part12-wgt/examples/wgt09.c

@@ -0,0 +1,98 @@
+#include "wgt.h"
+#include "include/mem.h"
+#include "include/mb.h"
+
+// ######## REQUIRED FUNCTIONS ########
+
+unsigned long state0 = 1000;
+unsigned long state1 = 2000;
+
+unsigned long rand(void)
+{
+    unsigned long s1 = state0;
+    unsigned long s0 = state1;
+
+    state0 = s0;
+    s1 ^= s1 << 23;
+    s1 ^= s1 >> 17;
+    s1 ^= s0;
+    s1 ^= s0 >> 26;
+    state1 = s1;
+
+    return state0 + state1;
+}
+
+void wait_msec(unsigned int n)
+{
+    register unsigned long f, t, r;
+
+    // Get the current counter frequency
+    asm volatile ("mrs %0, cntfrq_el0" : "=r"(f));
+    // Read the current counter
+    asm volatile ("mrs %0, cntpct_el0" : "=r"(t));
+    // Calculate expire value for counter
+    t+=((f/1000)*n)/1000;
+    do{asm volatile ("mrs %0, cntpct_el0" : "=r"(r));}while(r<t);
+}
+
+// ######## STUB FUNCTIONS ########
+
+unsigned int kb = 0;
+
+unsigned int kbhit(void) {
+    kb++;
+    return kb / 500;
+}
+
+void getch(void) {
+    wait_msec(0x500000);
+    kb = 0;
+}
+
+// ######## WGT EXAMPLES ########
+
+void wgt09()
+{
+  short i, x, y;
+  block screen1;                  /* a full screen */
+  block part1;                    /* part of the screen */
+
+  set_clock_rate(get_max_clock());
+  mem_init();
+  vga256 ();
+
+  for (i = 1; i < 1080; i++)
+  {
+     wsetcolor (vgapal[i % 255]);
+     wline (0, 0, 1919, i);
+     wline (1919, 1079, 0, 1079 - i);
+  }
+
+  screen1 = wnewblock (0, 0, 1919, 1079); /* capture the entire screen */
+  part1 = wnewblock (0, 0, 900, 810);   /* get a part of the screen */
+  /* Note that wnewblock allocates the memory for the block */
+
+  wcls (vgapal[0]);
+
+  do {
+    x = rand() % 1920;
+    y = rand() % 1080;
+    wputblock (x, y, part1, 0);         /* put the part somewhere */
+  } while (!kbhit ());
+
+  getch ();
+
+  wputblock (0, 0, screen1, 0);         /* replace the mess with the */
+                                        /* original screen */
+
+  getch ();                             /* get the key */
+
+  wfreeblock (screen1);                 /* *** make sure to free the memory! */
+  wfreeblock (part1);
+}
+
+void main()
+{
+    wgt09();
+    while (1);
+}

part12-wgt/include/mb.h

@@ -37,3 +37,6 @@ enum {
 };
 
 unsigned int mbox_call(unsigned char ch);
+int get_max_clock();
+int get_clock_rate();
+int set_clock_rate(unsigned int rate);

part12-wgt/lib/mb.c

@@ -1,4 +1,5 @@
 #include "../include/io.h"
+#include "../include/mb.h"
 
 // The buffer must be 16-byte aligned as only the upper 28 bits of the address can be passed via the mailbox
 volatile unsigned int __attribute__((aligned(16))) mbox[36];
@@ -37,3 +38,61 @@ unsigned int mbox_call(unsigned char ch)
     }
     return 0;
 }
+
+int get_max_clock()
+{
+    mbox[0] = 8*4; // Length of message in bytes
+    mbox[1] = MBOX_REQUEST;
+    mbox[2] = MBOX_TAG_GETCLKMAXM; // Tag identifier
+    mbox[3] = 8; // Value size in bytes
+    mbox[4] = 0; // Value size in bytes
+    mbox[5] = 0x3; // Value
+    mbox[6] = 0; // Rate
+    mbox[7] = MBOX_TAG_LAST;
+
+    if (mbox_call(MBOX_CH_PROP)) {
+        if (mbox[5] == 0x3) {
+           return mbox[6];
+        }
+    }
+    return 0;
+}
+
+int get_clock_rate()
+{
+    mbox[0] = 8*4; // Length of message in bytes
+    mbox[1] = MBOX_REQUEST;
+    mbox[2] = MBOX_TAG_GETCLKRATE; // Tag identifier
+    mbox[3] = 8; // Value size in bytes
+    mbox[4] = 0; // Value size in bytes
+    mbox[5] = 0x3; // Value
+    mbox[6] = 0; // Rate
+    mbox[7] = MBOX_TAG_LAST;
+
+    if (mbox_call(MBOX_CH_PROP)) {
+        if (mbox[5] == 0x3) {
+           return mbox[6];
+        }
+    }
+    return 0;
+}
+
+int set_clock_rate(unsigned int rate)
+{
+    mbox[0] = 9*4;  // Length of message in bytes
+    mbox[1] = MBOX_REQUEST;
+    mbox[2] = MBOX_TAG_SETCLKRATE; // Tag identifier
+    mbox[3] = 12;   // Value size in bytes
+    mbox[4] = 0;    // Value size in bytes
+    mbox[5] = 0x3;  // Value
+    mbox[6] = rate; // Rate
+    mbox[7] = 0;    // Rate
+    mbox[8] = MBOX_TAG_LAST;
+
+    if (mbox_call(MBOX_CH_PROP)) {
+        if (mbox[5] == 0x3 && mbox[6] == rate) {
+           return 1;
+        }
+    }
+    return 0;
+}

part12-wgt/lib/mem.c

@@ -1,16 +1,16 @@
-extern unsigned char _end[];
-
 // Define the heap
 
+extern unsigned char _end[];
 // unsigned char *HEAP_START = &_end[0]; // End of kernel
+
 unsigned char *HEAP_START = (unsigned char *)0x400000; // Top of stack
-unsigned int   HEAP_SIZE  = 0x30000000; // Max heap size is 764Mb
+unsigned int   HEAP_SIZE  = 0x30000000; // Max heap size is 768Mb
 unsigned char *HEAP_END;
 
-// Set up some globals
+// Set up some static globals
 
-unsigned char *freeptr;
+static unsigned char *freeptr;
-unsigned int allocated = 0;
+static unsigned int bytes_allocated = 0;
 
 void mem_init()
 {
@@ -33,7 +33,7 @@ void *malloc(unsigned int size)
          return 0;
       } else {
          freeptr += size;
-         allocated += size; 
+         bytes_allocated += size;
 
          return allocated;
       }

part12-wgt/wgt.c

@@ -4,11 +4,14 @@ block abuf;                              /* pointer to the active screen */
 unsigned int currentcolor;
 short tx = 0,ty = 0,bx = 1919,by = 1079; /* clipping variables */
 
+int curx = 0;
+int cury = 0;
+
 wgt_sys WGT_SYS;
 
 // ######## HELPER FUNCTIONS ########
 
-void *memset(void *dest, int val, unsigned len)
+void *memset(void *dest, unsigned int val, unsigned len)
 {
     unsigned int *ptr = dest;
     while (len-- > 0)
@@ -16,10 +19,11 @@ void *memset(void *dest, int val, unsigned len)
     return dest;
 }
 
+
 void *memcpy(void *dest, const void *src, unsigned len)
 {
-    char *d = dest;
+    unsigned int *d = dest;
-    const char *s = src;
+    const unsigned int *s = src;
     while (len--)
        *d++ = *s++;
     return dest;
@@ -44,3 +48,46 @@ void wcls (unsigned int col)
 {
     memset (abuf, col, WGT_SYS.xres * WGT_SYS.yres);
 }
+
+void debugstr(char *str) {
+    if (curx + (strlen(str) * 8)  >= 1920) {
+       curx = 0; cury += 8;
+    }
+    if (cury + 8 >= 1080) {
+       cury = 0;
+    }
+    wtextcolor(vgapal[15]);
+    wouttextxy (curx, cury, NULL, str);
+
+    curx += (strlen(str) * 8);
+}
+
+void debugcrlf(void) {
+    curx = 0; cury += 8;
+}
+
+void debugreset(void) {
+    curx = 0; cury = 0;
+}
+
+void debugch(unsigned char b) {
+    unsigned int n;
+    int c;
+    for(c=4;c>=0;c-=4) {
+        n=(b>>c)&0xF;
+        n+=n>9?0x37:0x30;
+        debugstr((char *)&n);
+    }
+    debugstr(" ");
+}
+
+void debughex(unsigned int d) {
+    unsigned int n;
+    int c;
+    for(c=28;c>=0;c-=4) {
+        n=(d>>c)&0xF;
+        n+=n>9?0x37:0x30;
+        debugstr((char *)&n);
+    }
+    debugstr(" ");
+}

part12-wgt/wgt.h

@@ -46,13 +46,19 @@ extern short bx,by,tx,ty;
 
 // ######## HELPER FUNCTIONS ########
 
-void *memset(void *dest, int val, unsigned len);
+void *memset(void *dest, unsigned int val, unsigned len);
 void *memcpy(void *dest, const void *src, unsigned len);
 int abs(int i);
 int strlen(const char *str);
 
 // ######## WGT FUNCTIONS ########
 
+void debugstr(char *str);
+void debugcrlf(void);
+void debugreset(void);
+void debugch(unsigned char b);
+void debughex(unsigned int d);
+
 void vga256(void);
 void wsetcolor (unsigned int col);
 void wline (short x, short y, short x2, short y2);
@@ -85,6 +91,7 @@ void wfreeblock (block ptr);
 short wgetblockwidth (block ptr);
 short wgetblockheight (block ptr);
 block wnewblock (short x, short y, short x2, short y2);
+void wputblock (short x, short y, block src, short method);
 block wallocblock (short width, short height);
 void wdonetimer (void);
 void winittimer (void);

part12-wgt/wnpblock.c

@@ -1,6 +1,10 @@
 #include "wgt.h"
 #include "include/mem.h"
 
+// We should replace this with faster version (and xray needs to do the right thing - not sure memcpy is a good replacement)
+#define fastcopy memcpy
+#define putxray memcpy
+
 block wnewblock (short x, short y, short x2, short y2)
 { 
   block ptr,orig;
@@ -11,7 +15,7 @@ block wnewblock (short x, short y, short x2, short y2)
   
   width = abs (x - x2) + 1;
   height = abs (y - y2) + 1;
-  size = (int)width * (int)height + 5;
+  size = 4 * ((int)width * (int)height) + 12;
   if  (x2 < x)
   { 
     temp = x; x = x2; x2 = temp;
@@ -20,14 +24,16 @@ block wnewblock (short x, short y, short x2, short y2)
   { 
     temp = y; y = y2; y2 = temp;
   }
+
   ptr = malloc (size);
   if  (ptr == NULL)
     return NULL;
+
   orig = ptr;
-  *(short *)ptr = width;   /* store the width */
+  *ptr = width;   /* store the width */
-  ptr += 2;              /* and height */
+  ptr ++;              /* and height */
-  *(short *)ptr = height;
+  *ptr = height;
-  ptr += 2;
+  ptr ++;
   
   dispofs = y * WGT_SYS.xres + x;
   temp = width;
@@ -49,16 +55,67 @@ block wallocblock (short width, short height)
   block ptr,orig;
   int size;
 
-  size = (int)width * (int)height + 5;
+  size = 4 * ((int)width * (int)height) + 12;
   ptr = malloc (size);
   if  (ptr == NULL)
     return NULL;
   orig = ptr;
-  *(short *)ptr = width;   /* store the width */
+  *ptr = width;   /* store the width */
-  ptr += 2;
+  ptr ++;
-  *(short *)ptr = height;       /* and height */
+  *ptr = height;       /* and height */
-  ptr += 2;
+  ptr ++;
 
-  memset (ptr, 0, size - 4);
+  memset (ptr, 0, (size - 12) / 4);
   return orig;
 }
+
+void wputblock (short x, short y, block src, short method)
+{
+  short width, height, display, maxy;
+  short ctr;
+  block dst;
+
+  if (src == NULL)
+    return;
+  width = *src;
+  src ++;
+  height = *src;
+  src ++;
+
+  if  (x + width > bx)
+    display = (bx + 1) - x;
+  else display = width;
+  if  (x < tx)
+  {
+    src += tx - x;
+    display -= tx - x;   
+    x = tx;
+  }                                    /* clip x */
+  if (display <= 0)
+    return;
+  
+  maxy = y + height - 1;
+  if  (maxy > by) 
+    maxy = by;
+  if  (y < ty)
+  {
+    src += (ty - y)*width;   
+    y = ty;
+  }                                    /* clip y */
+  
+  dst = &abuf[y * WGT_SYS.xres + x];
+  if (method == 0)
+    for  (ctr = y; ctr <= maxy; ctr++)
+    {
+      fastcopy (dst, src, display);
+      src += width;
+      dst += WGT_SYS.xres;
+    } 
+  else
+    for  (ctr = y; ctr <= maxy; ctr++)
+    {
+      putxray (dst, src, display);
+      src += width;
+      dst += WGT_SYS.xres;
+    } 
+}