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https://github.com/isometimes/rpi4-osdev
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Added samples/wgt36.c and wgt/wxor.c
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3 changed files with 139 additions and 0 deletions
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@ -158,3 +158,4 @@ void msetxy (short x, short y);
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void msetbut (short event, short bnum);
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void msetbounds (short x1, short y1, short x2, short y2);
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void noclick();
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void wxorbox (short x, short y, short x2, short y2, unsigned char col);
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96
part12-wgt/samples/wgt36.c
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96
part12-wgt/samples/wgt36.c
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@ -0,0 +1,96 @@
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#include "include/wgt.h"
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#include "include/mem.h"
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#include "include/multicore.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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// ######## 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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#define NUM_IN 5 /* number of random points */
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#define NUM_OUT 30 /* number of points of bezier curve */
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/* Fewer points will make more chunky line */
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int ox, oy; /* old mouse coordinates */
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int i;
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void wgt36()
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{
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set_clock_rate(get_max_clock());
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mem_init();
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vga256 (); /* Initialize graphics mode */
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start_core2(minit); // Start the comms engine (core 2)
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while (!comms_up); // Wait for comms up
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for (i = 0; i < 200; i++) /* Draw a background */
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{
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wsetcolor (vgapal[i]);
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wline (0, i, 319, i);
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}
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do { /* Draws a filled xorbox using mouse coordinates as one corner. */
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ox = mx;
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oy = my;
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wxorbox (50, 50, ox, oy, vgapal[128]); /* Draw the box */
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while ((mx == ox) && (my == oy) && (!but)); /* Do nothing while mouse is
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stationary. */
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wxorbox (50, 50, ox, oy, vgapal[128]);
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/* Erase the box by drawing the same thing */
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} while (but == 0);
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noclick ();
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do { /* Draws a hollow rubber box using mouse coordinates as one corner. */
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ox = mx;
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oy = my;
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wxorbox (50, 50, ox, 50, vgapal[128]);
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wxorbox (ox, 50, ox, oy, vgapal[128]); /* Draw the box */
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wxorbox (50, oy, ox, oy, vgapal[128]);
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wxorbox (50, 50, 50, oy, vgapal[128]);
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while ((mx == ox) && (my == oy) && (!but)); /* Do nothing while mouse is
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stationary. */
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wxorbox (50, 50, ox, 50, vgapal[128]);
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wxorbox (ox, 50, ox, oy, vgapal[128]); /* Erase the box */
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wxorbox (50, oy, ox, oy, vgapal[128]);
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wxorbox (50, 50, 50, oy, vgapal[128]);
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} while (but == 0);
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mdeinit (); /* Deinitialize the mouse handler */
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}
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void main()
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{
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wgt36();
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while (1);
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}
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42
part12-wgt/wgt/wxor.c
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42
part12-wgt/wgt/wxor.c
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#include "../include/wgt.h"
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void wxorbox (short x, short y, short x2, short y2, unsigned char col)
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{
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short i, j; /* Loop Control */
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block temp; /* Temp pointer to screen */
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if (y2 < y)
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{
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/* swap y's */
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i = y;
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y = y2;
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y2 = i;
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}
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if (x2 < x)
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{
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/* swap x's */
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i = x;
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x = x2;
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x2 = i;
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}
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if (y2 > by) y2 = by; /* Clip box */
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if (x2 > bx) x2 = bx;
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if (y < ty) y = ty;
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if (x < tx) x = tx;
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temp = &abuf[y*WGT_SYS.xres + x]; /* Move to first offset */
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for (j = y; j <= y2; j++)
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{
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for (i = x; i <= x2; i++)
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{
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/* This can be change to perform any logical operation
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on the pixels, such as & or | */
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*temp = *temp ^ col; /* XOR the pixel on screen with col and put it back on screen */
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temp++; /* Go to next pixel */
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} /* x loop */
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temp += (WGT_SYS.xres - 1) - (x2 - x); /* Advance to next row */
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} /* y loop */
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}
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