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Added wflipblock and wgt10.c example to exercise it
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4 changed files with 155 additions and 3 deletions
100
part12-wgt/examples/wgt10.c
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100
part12-wgt/examples/wgt10.c
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#include "wgt.h"
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#include "include/mem.h"
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#include "include/mb.h"
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// ######## REQUIRED FUNCTIONS ########
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unsigned long state0 = 1000;
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unsigned long state1 = 2000;
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unsigned long rand(void)
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{
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unsigned long s1 = state0;
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unsigned long s0 = state1;
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state0 = s0;
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s1 ^= s1 << 23;
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s1 ^= s1 >> 17;
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s1 ^= s0;
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s1 ^= s0 >> 26;
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state1 = s1;
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return state0 + state1;
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}
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void wait_msec(unsigned int n)
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{
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register unsigned long f, t, r;
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// Get the current counter frequency
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asm volatile ("mrs %0, cntfrq_el0" : "=r"(f));
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// Read the current counter
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asm volatile ("mrs %0, cntpct_el0" : "=r"(t));
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// Calculate expire value for counter
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t+=((f/1000)*n)/1000;
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do{asm volatile ("mrs %0, cntpct_el0" : "=r"(r));}while(r<t);
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}
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// ######## STUB FUNCTIONS ########
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unsigned int kb = 0;
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unsigned int kbhit(void) {
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kb++;
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return kb / 500;
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}
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void getch(void) {
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wait_msec(0x500000);
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kb = 0;
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}
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// ######## WGT EXAMPLES ########
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void wgt10()
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{
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short x,y;
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block part1; /* part of the screen */
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set_clock_rate(get_max_clock());
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mem_init();
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vga256 ();
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for (y = 216; y >= 4; y--)
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{
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wfill_circle (y + 40, y + 10, y); /* draw a pattern */
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wsetcolor (vgapal[(y % 235) + 20]);
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}
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part1 = wnewblock (0, 0, 960, 540); /* get the circle in a block */
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getch();
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wcls (0);
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for (x = 0; x < 1920; x++)
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{
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wsetcolor (vgapal[x % 255]);
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wline (x, 0, x, 1079);
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}
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getch();
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wputblock (960, 0, part1, 0); /* normal mode */
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wflipblock (part1, 0);
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wputblock (960, 540, part1, 1); /* XRAY mode */
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wflipblock (part1, 1);
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wputblock (0, 540, part1, 0); /* normal mode */
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wflipblock (part1, 0);
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wputblock (0, 0, part1, 1); /* XRAY mode */
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wfreeblock (part1);
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}
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void main()
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{
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wgt10();
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while (1);
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}
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51
part12-wgt/wflipb.c
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part12-wgt/wflipb.c
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#include "wgt.h"
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#include "include/mem.h"
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#define fastcopy memcpy
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void wflipblock (block image, short direction)
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{
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int width,height;
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int ctr,ctr2;
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block temp, temp2;
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unsigned int *pr2;
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width = wgetblockwidth (image); /* Find width and height of block */
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height = wgetblockheight (image);
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temp = malloc (width*4);
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temp2 = malloc (width*4);
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image += 4;
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if (direction == 1) /* Horizontal flip */
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{
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for (ctr = 1; ctr <= height; ctr++)
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/* Use each row */
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{
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fastcopy (temp, image, width);
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/* Copy row to buffer */
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for (ctr2 = 0; ctr2 <= width - 1; ctr2++)
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temp2[width - 1 - ctr2] = temp[ctr2];
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/* Reverse elements
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to another buffer */
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fastcopy (image, temp2, width); /* Copy back to original block */
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image += width; /* Advance pr to next row */
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}
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}
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else if (direction == 0) /* Vertical flip */
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{
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pr2 = image + (height*width) - width; /* pr2 points to last row */
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for (ctr = 1; ctr <= (height / 2); ctr++)
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/* Only flip halfway */
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{
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fastcopy (temp, image, width); /* Get row of image data */
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fastcopy (image, pr2, width); /* Copy last row to first */
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fastcopy (pr2, temp, width); /* Put first row on last */
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image += width; /* Move to next row */
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pr2 -= width; /* Decrement last row */
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}
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}
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free (temp);
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free (temp2);
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}
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@ -98,3 +98,4 @@ void winittimer (void);
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void wsettimerspeed (int speed);
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void wstarttimer (void (*rout)(), int speed);
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void wstoptimer (void);
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void wflipblock (block image, short direction);
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@ -10,11 +10,11 @@ void wfreeblock (block ptr)
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short wgetblockwidth (block ptr)
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{
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return *(short *)ptr; /* Width is first 2 bytes of data */
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return *ptr; /* Width is first 2 bytes of data */
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}
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short wgetblockheight (block ptr)
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{
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ptr += 2; /* Skip width */
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return *(short *)ptr; /* Height is second 2 bytes of data */
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ptr ++; /* Skip width */
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return *ptr; /* Height is second 2 bytes of data */
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}
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