Added wflipblock and wgt10.c example to exercise it

This commit is contained in:
Adam Greenwood-Byrne 2021-03-11 22:52:23 +00:00
parent ac74e42f24
commit 22ac7a36cd
4 changed files with 155 additions and 3 deletions

100
part12-wgt/examples/wgt10.c Normal file
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@ -0,0 +1,100 @@
#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 wgt10()
{
short x,y;
block part1; /* part of the screen */
set_clock_rate(get_max_clock());
mem_init();
vga256 ();
for (y = 216; y >= 4; y--)
{
wfill_circle (y + 40, y + 10, y); /* draw a pattern */
wsetcolor (vgapal[(y % 235) + 20]);
}
part1 = wnewblock (0, 0, 960, 540); /* get the circle in a block */
getch();
wcls (0);
for (x = 0; x < 1920; x++)
{
wsetcolor (vgapal[x % 255]);
wline (x, 0, x, 1079);
}
getch();
wputblock (960, 0, part1, 0); /* normal mode */
wflipblock (part1, 0);
wputblock (960, 540, part1, 1); /* XRAY mode */
wflipblock (part1, 1);
wputblock (0, 540, part1, 0); /* normal mode */
wflipblock (part1, 0);
wputblock (0, 0, part1, 1); /* XRAY mode */
wfreeblock (part1);
}
void main()
{
wgt10();
while (1);
}

51
part12-wgt/wflipb.c Normal file
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@ -0,0 +1,51 @@
#include "wgt.h"
#include "include/mem.h"
#define fastcopy memcpy
void wflipblock (block image, short direction)
{
int width,height;
int ctr,ctr2;
block temp, temp2;
unsigned int *pr2;
width = wgetblockwidth (image); /* Find width and height of block */
height = wgetblockheight (image);
temp = malloc (width*4);
temp2 = malloc (width*4);
image += 4;
if (direction == 1) /* Horizontal flip */
{
for (ctr = 1; ctr <= height; ctr++)
/* Use each row */
{
fastcopy (temp, image, width);
/* Copy row to buffer */
for (ctr2 = 0; ctr2 <= width - 1; ctr2++)
temp2[width - 1 - ctr2] = temp[ctr2];
/* Reverse elements
to another buffer */
fastcopy (image, temp2, width); /* Copy back to original block */
image += width; /* Advance pr to next row */
}
}
else if (direction == 0) /* Vertical flip */
{
pr2 = image + (height*width) - width; /* pr2 points to last row */
for (ctr = 1; ctr <= (height / 2); ctr++)
/* Only flip halfway */
{
fastcopy (temp, image, width); /* Get row of image data */
fastcopy (image, pr2, width); /* Copy last row to first */
fastcopy (pr2, temp, width); /* Put first row on last */
image += width; /* Move to next row */
pr2 -= width; /* Decrement last row */
}
}
free (temp);
free (temp2);
}

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@ -98,3 +98,4 @@ void winittimer (void);
void wsettimerspeed (int speed);
void wstarttimer (void (*rout)(), int speed);
void wstoptimer (void);
void wflipblock (block image, short direction);

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@ -10,11 +10,11 @@ void wfreeblock (block ptr)
short wgetblockwidth (block ptr)
{
return *(short *)ptr; /* Width is first 2 bytes of data */
return *ptr; /* Width is first 2 bytes of data */
}
short wgetblockheight (block ptr)
{
ptr += 2; /* Skip width */
return *(short *)ptr; /* Height is second 2 bytes of data */
ptr ++; /* Skip width */
return *ptr; /* Height is second 2 bytes of data */
}