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https://github.com/isometimes/rpi4-osdev
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Added wdissolve routine, exercised in examples/wgt17.c
This commit is contained in:
Adam Greenwood-Byrne
parent
cb1242ca45
commit
333faa486d
6 changed files with 244 additions and 1 deletions
152
part12-wgt/examples/wgt17.c
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152
part12-wgt/examples/wgt17.c
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@ -0,0 +1,152 @@
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#include "wgt.h"
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#include "include/mem.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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short randdissolve[513]={
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256,0,0,9,8,3,11,15,12,12,2,4,2,9,14,0,9,8,1,13,7,1,3,13,14
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,5,7,3,14,7,4,11,11,7,11,2,6,13,0,10,5,6,15,0,12,15,4,5,0
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,14,9,7,6,5,13,4,4,15,7,2,1,11,15,0,6,5,10,9,3,13,11,12,5
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,0,14,2,9,6,3,10,1,11,9,7,13,3,8,11,13,0,2,14,2,9,11,6,8
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,6,1,11,7,15,15,7,9,9,6,5,5,1,13,9,0,2,15,1,5,3,5,11,3
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,1,10,15,10,4,0,15,0,8,15,1,7,14,6,3,3,9,12,13,4,4,12,4,6
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,11,4,11,14,9,9,2,4,12,10,8,4,10,12,4,9,11,0,13,13,1,0,13,8
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,1,1,1,11,10,6,7,2,0,4,14,1,14,14,10,10,7,7,9,2,14,3,13,10
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,8,5,5,2,4,8,9,7,6,13,2,3,13,2,14,11,8,10,6,4,2,13,3,7
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,12,13,12,7,15,1,4,7,11,8,7,0,5,11,12,6,1,4,1,14,8,8,3,10
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,6,6,10,2,13,12,6,10,0,8,3,1,9,4,10,13,6,12,6,7,11,6,5,3
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,8,13,4,5,3,2,7,14,2,12,4,14,10,8,14,4,12,3,12,9,11,2,8,3
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,12,12,14,13,6,11,6,5,3,4,13,6,9,1,2,11,8,14,7,8,4,1,14,5
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,9,10,2,8,9,5,7,1,15,2,3,13,15,8,1,2,15,6,4,15,10,3,12,0
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,0,5,12,1,2,0,5,1,7,3,6,9,2,7,4,10,1,12,0,1,14,15,7,5
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,8,7,10,9,1,6,3,0,8,2,8,9,1,9,10,15,10,14,10,7,12,8,14,12
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,13,15,12,14,9,13,6,0,13,9,14,10,10,11,5,4,15,11,11,10,6,2,11,5
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,11,1,8,0,10,0,14,8,11,12,8,12,7,10,7,12,7,15,12,15,2,10,0,10
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,3,9,3,6,3,15,5,14,3,12,4,13,5,12,1,8,10,4,12,11,5,6,15,14
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,14,0,2,2,0,3,8,6,0,11,0,15,15,13,13,1,15,3,13,5,14,7,0,7
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,8,11,4,11,6,14,2,14,13,3,2,5,5,15,5,9,15,5,0,13,4,3,9,15
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,5,8,15,9,12,4,1,15};
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/* this large array was made with dissolve.exe
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run it to create your own patterns. */
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short sideways[515]={
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257,3,6,0,0,0,1,0,2,0,3,0,4,0,5,0,6,0,7,0,8,0,9,0,10
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,0,11,0,12,0,13,0,14,0,15,1,0,1,1,1,2,1,3,1,4,1,5,1,6
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,1,7,1,8,1,9,1,10,1,11,1,12,1,13,1,14,1,15,2,0,2,1,2,2
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,2,3,2,4,2,5,2,6,2,7,2,8,2,9,2,10,2,11,2,12,2,13,2,14
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,2,15,3,0,3,1,3,2,3,3,3,4,3,5,3,6,3,7,3,8,3,9,3,10
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,3,11,3,12,3,13,3,14,3,15,4,0,4,1,4,2,4,3,4,4,4,5,4,6
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,4,7,4,8,4,9,4,10,4,11,4,12,4,13,4,14,4,15,5,0,5,1,5,2
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,5,3,5,4,5,5,5,6,5,7,5,8,5,9,5,10,5,11,5,12,5,13,5,14
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,5,15,6,0,6,1,6,2,6,3,6,4,6,5,6,6,6,7,6,8,6,9,6,10
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,6,11,6,12,6,13,6,14,6,15,7,0,7,1,7,2,7,3,7,4,7,5,7,6
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,7,7,7,8,7,9,7,10,7,11,7,12,7,13,7,14,7,15,8,0,8,1,8,2
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,8,3,8,4,8,5,8,6,8,7,8,8,8,9,8,10,8,11,8,12,8,13,8,14
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,8,15,9,0,9,1,9,2,9,3,9,4,9,5,9,6,9,7,9,8,9,9,9,10
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,9,11,9,12,9,13,9,14,9,15,10,0,10,1,10,2,10,3,10,4,10,5,10,6
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,10,7,10,8,10,9,10,10,10,11,10,12,10,13,10,14,10,15,11,0,11,1,11,2
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,11,3,11,4,11,5,11,6,11,7,11,8,11,9,11,10,11,11,11,12,11,13,11,14
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,11,15,12,0,12,1,12,2,12,3,12,4,12,5,12,6,12,7,12,8,12,9,12,10
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,12,11,12,12,12,13,12,14,12,15,13,0,13,1,13,2,13,3,13,4,13,5,13,6
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,13,7,13,8,13,9,13,10,13,11,13,12,13,13,13,14,13,15,14,0,14,1,14,2
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,14,3,14,4,14,5,14,6,14,7,14,8,14,9,14,10,14,11,14,12,14,13,14,14
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,14,15,15,0,15,1,15,2,15,3,15,4,15,5,15,6,15,7,15,8,15,9,15,10
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,15,11,15,12,15,13,15,14,15,15};
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/* and another one */
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int x, y;
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int oldmode;
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block screen1;
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void wgt17()
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{
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short y;
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block screen1;
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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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screen1 = wnewblock (0, 0, 319, 199);
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wsetscreen (screen1);
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for (y = 0; y < 200; y++)
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{
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wsetcolor (vgapal[y]);
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wline (0, y, 319, y); /* draw something on another screen */
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}
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wnormscreen ();
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wdissolve (screen1, randdissolve, 2);
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/* screen to dissolve, pattern, speed */
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getch ();
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wsetscreen (screen1);
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wcls (vgapal[0]);
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wnormscreen ();
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wclip (75, 75, 245, 124); /* works with clipping too */
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/* so you can fade in parts of screens */
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wdissolve (screen1, sideways, 2);
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wclip (0, 0, 319, 199);
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getch ();
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wdissolve (screen1, randdissolve, 2);
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getch ();
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wfreeblock (screen1); /* remember to free that memory */
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}
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void main()
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{
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wgt17();
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while (1);
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}
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35
part12-wgt/wdissolve.c
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35
part12-wgt/wdissolve.c
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@ -0,0 +1,35 @@
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#include "wgt.h"
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void wdissolve (block sourceimage, short *pattern, short speed)
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{
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short j, k, l, t, a, b;
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unsigned short addr;
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t = *pattern;
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pattern++;
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for (j = 0; j < t; j++)
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{
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a = *pattern;
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pattern++;
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b = *pattern;
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pattern++;
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delay (speed);
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for (k = 0; k < WGT_SYS.yres; k += 16)
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/* Since the fade pattern matrix is 16x16, we change every
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16th pixel at the same time. */
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{
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for (l = 0; l < WGT_SYS.xres; l += 16)
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{
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if ((k + b < by + 1) & (l + a < bx + 1) & (k + b >= ty)
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& (l + a >= tx))
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/* Make sure the pixel is within clipping */
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{
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addr = ((k + b) * WGT_SYS.xres + l + a);
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abuf[addr] = sourceimage[addr + 2];
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}
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}
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}
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}
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}
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@ -1,6 +1,7 @@
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#include "wgt.h"
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block abuf; /* pointer to the active screen */
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block fbuf; /* pointer to the hardware framebuffer */
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unsigned int currentcolor;
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short tx = 0,ty = 0,bx = 319,by = 199; /* clipping variables */
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@ -106,3 +107,16 @@ void debughex(unsigned int d) {
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}
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debugstr(" ");
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}
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void delay(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;
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do{asm volatile ("mrs %0, cntpct_el0" : "=r"(r));}while(r<t);
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}
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@ -42,6 +42,9 @@ extern unsigned char vgafont[224][8];
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typedef unsigned int *block;
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extern block abuf;
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/* Pointer to the hardware framebuffer */
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extern block fbuf;
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/* Current drawing color */
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extern unsigned int currentcolor;
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@ -64,6 +67,8 @@ void debugreset(void);
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void debugch(unsigned char b);
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void debughex(unsigned int d);
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void delay(unsigned int n);
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void vga256(void);
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void wsetcolor (unsigned int col);
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void wline (short x, short y, short x2, short y2);
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@ -107,3 +112,6 @@ void wflipblock (block image, short direction);
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block wloadblock (unsigned char *data);
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void wloadpalette (unsigned char *data, color *pal);
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void wresize (short x, short y, short x2, short y2, block image, short mode);
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void wdissolve (block sourceimage, short *pattern, short speed);
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void wsetscreen (block image);
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void wnormscreen (void);
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33
part12-wgt/wscreen.c
Normal file
33
part12-wgt/wscreen.c
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@ -0,0 +1,33 @@
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#include "wgt.h"
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void wsetscreen (block image)
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{
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if (image == NULL)
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{
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abuf = fbuf;
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WGT_SYS.xres = WGT_SYS.screenwidth;
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WGT_SYS.yres = WGT_SYS.screenheight;
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}
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else
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{
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WGT_SYS.xres = wgetblockwidth (image); /* Get virtual screen size */
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WGT_SYS.yres = wgetblockheight (image);
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image += 2;
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abuf = image;
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}
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tx = 0;
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ty = 0;
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bx = WGT_SYS.xres - 1;
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by = WGT_SYS.yres - 1;
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}
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void wnormscreen (void)
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{
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abuf = fbuf;
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WGT_SYS.xres = WGT_SYS.screenwidth;
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WGT_SYS.yres = WGT_SYS.screenheight;
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tx = 0;
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ty = 0;
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bx = WGT_SYS.xres - 1;
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by = WGT_SYS.yres - 1;
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}
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@ -56,6 +56,7 @@ void vga256(void)
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WGT_SYS.screenwidth = mbox[10];
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WGT_SYS.screenheight = mbox[11];
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abuf = (unsigned int *)((long)mbox[28]);
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fbuf = (unsigned int *)((long)mbox[28]);
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abuf = fbuf;
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}
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}
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