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https://github.com/isometimes/rpi4-osdev
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Added loadspr.c with examples/wgt29.c which exercises it - a scrolly thing
This commit is contained in:
parent
6911e4630d
commit
c0f33240cb
7 changed files with 299 additions and 2 deletions
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@ -17,11 +17,14 @@ bin/wgt1blk.o: bin/wgt1.blk
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bin/wgt2blk.o: bin/wgt2.blk
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$(LLVMPATH)/llvm-objcopy -I binary -O elf64-littleaarch64 -B aarch64 $< $@
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bin/lettersspr.o: bin/letters.spr
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$(LLVMPATH)/llvm-objcopy -I binary -O elf64-littleaarch64 -B aarch64 $< $@
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%.o: %.c
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$(LLVMPATH)/clang --target=aarch64-elf $(CLANGFLAGS) -c $< -o $@
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kernel8.img: boot/boot.o $(OFILES) bin/wgt1pal.o bin/wgt1blk.o bin/wgt2blk.o
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$(LLVMPATH)/ld.lld -m aarch64elf -nostdlib boot/boot.o $(OFILES) bin/wgt1pal.o bin/wgt1blk.o bin/wgt2blk.o -T boot/link.ld -o kernel8.elf
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kernel8.img: boot/boot.o $(OFILES) bin/wgt1pal.o bin/wgt1blk.o bin/wgt2blk.o bin/lettersspr.o
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$(LLVMPATH)/ld.lld -m aarch64elf -nostdlib boot/boot.o $(OFILES) bin/wgt1pal.o bin/wgt1blk.o bin/wgt2blk.o bin/lettersspr.o -T boot/link.ld -o kernel8.elf
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$(LLVMPATH)/llvm-objcopy -O binary kernel8.elf kernel8.img
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clean:
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BIN
part12-wgt/bin/letters.spr
Normal file
BIN
part12-wgt/bin/letters.spr
Normal file
Binary file not shown.
110
part12-wgt/examples/wgt29.c
Normal file
110
part12-wgt/examples/wgt29.c
Normal file
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@ -0,0 +1,110 @@
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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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void wgt29()
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{
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color p[256]; /* Our palette */
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block sprites[1001]; /* Pointers to blocks */
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char *scrolltext="THIS IS A SMALL TEXT SCROLLER CREATED WITH THE WCOPYSCREEN COMMAND. PRESS A KEY TO END THIS SCROLLER... ";
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int scrnum; /* Counter for current letter of scroller */
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int nextlet, i, j; /* Counters */
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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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for (i = 0; i < 180; i++) /* Draws a background for the screen */
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{
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wsetcolor (vgapal[i]);
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wline (0, 0, 319, i);
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wline (319, 199, 0, 180 - i);
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}
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wsetcolor (vgapal[0]); /* Draw with black */
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wbar (0, 189, 319, 199); /* Clear area off bottom for scroller */
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extern unsigned char _binary_bin_letters_spr_start[];
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unsigned char *lettersspr = &_binary_bin_letters_spr_start[0];
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wloadsprites (p, lettersspr, sprites, 0, 1000); // Load our blocks
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do {
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scrnum = 0; /* Start at first character of scroller string */
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do {
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/* Find pixel width of current letter in string */
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nextlet = wgetblockwidth (sprites[scrolltext[scrnum] + 1]);
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for (j = 0; j <= nextlet + 1; j += 2)
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{
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wbar (318, 189, 319, 199); /* Erase right-hand side of scroller area */
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/* Now copy the last letter on at the end of the string */
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wputblock (319 - j, 189, sprites[scrolltext[scrnum] + 1], 0);
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/* Wait for monitor to finish vertical retrace */
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wait_msec(0x3E9F); // Ugly - this needs to sync better... could use the timer I suppose... NITV!
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/* Shift scroller to the left */
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wcopyscreen (2, 189, 319, 199, NULL, 0, 189, NULL);
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}
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scrnum++; /* Advance to next letter */
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} while (scrolltext[scrnum + 1] != 0);
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} while (1);
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wfreesprites (sprites, 0, 1000); /* Free our sprites */
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}
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void main()
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{
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wgt29();
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while (1);
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}
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90
part12-wgt/loadspr.c
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90
part12-wgt/loadspr.c
Normal file
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@ -0,0 +1,90 @@
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#include "wgt.h"
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#include "include/mem.h"
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short wloadsprites (color *pal, unsigned char *file, block *image_array, short start,
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short end)
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{
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short maxsprite; /* maximum # of sprites in the file */
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short startingsprite; /* First sprite in the file. Version <=3 = 1
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Version 4 = 0 */
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unsigned int a, b, i, spritemade;
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char buf[14];
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int size;
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a = (unsigned int)*file;
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file += 2;
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/* Get the version number, and change the startingsprite accordingly.
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If version <= 3, maxsprite contains the maximum number of sprites
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that can be stored in a file. If version > 4, maxsprite contains
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the number of the highest sprite in the file. (empty sprites at
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the end are not kept in the file. */
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if (a <= 3)
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startingsprite = 1;
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else
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startingsprite = 0;
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memcpy_char(&buf, file, 13);
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file += 13;
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if (0 == memcmp (" Sprite File ", &buf[0], 13))
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/* see if it is a sprite file */
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{
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for (int k=0;k<256;k++) {
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pal[k].r = 4 * *file++;
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pal[k].g = 4 * *file++;
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pal[k].b = 4 * *file++;
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}
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wsetpalette (0, 255, pal);
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maxsprite = (short)*file; /* maximum sprites in this file */
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file += 2;
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for (i = start; i <= end; i++) /* make all sprites null
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(still need to call wfreesprites) */
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image_array[i] = NULL;
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for (i = startingsprite; i <= maxsprite; i++) /* load them in */
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{
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spritemade = (unsigned int)*file; /* flag to see if sprite exists */
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file += 2;
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if (spritemade == 1)
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{
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a = (unsigned int)*file; /* get width and height */
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file += 2;
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b = (unsigned int)*file;
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file += 2;
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if ((i >= start) && (i <= end)) /* Load this one */
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{
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size = a * b;
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image_array[i] = (block)malloc ((size * 4) + 12);
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block arr = image_array[i];
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*arr++ = a;
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*arr++ = b;
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for (int k=0;k<size;k++) *arr++ = vgapal[*file++];
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}
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else /* Don't load this one */
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file += size;
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}
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}
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}
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return (0);
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}
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void wfreesprites (block *image_array, short start, short end)
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{
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short i;
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for (i = start; i <= end; i++)
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{
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if (image_array[i] != NULL)
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{
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free (image_array[i]);
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image_array[i] = NULL;
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}
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}
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}
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@ -45,6 +45,29 @@ void *memcpy_xray(void *dest, const void *src, unsigned len)
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return dest;
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}
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void *memcpy_char(void *dest, const void *src, unsigned len)
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{
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unsigned char *d = dest;
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const unsigned char *s = src;
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while (len--)
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*d++ = *s++;
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return dest;
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}
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int memcmp(char *str1, char *str2, unsigned count)
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{
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char *s1 = str1;
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char *s2 = str2;
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while (count-- > 0)
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{
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if (*s1++ != *s2++)
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return s1[-1] < s2[-1] ? -1 : 1;
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}
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return 0;
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}
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int abs(int i)
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{
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return i < 0 ? -i : i;
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@ -56,6 +56,8 @@ extern short bx,by,tx,ty;
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void *memset(void *dest, unsigned int val, unsigned len);
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void *memcpy(void *dest, const void *src, unsigned len);
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void *memcpy_xray(void *dest, const void *src, unsigned len);
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void *memcpy_char(void *dest, const void *src, unsigned len);
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int memcmp(char *str1, char *str2, unsigned count);
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int abs(int i);
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int strlen(const char *str);
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@ -118,3 +120,6 @@ void wnormscreen (void);
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void wvertres (short x, short y, short y2, block image);
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void wwipe (short x, short y, short x2, short y2, block image);
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void wskew (short x, short y, block image, short degrees);
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short wloadsprites (color *pal, unsigned char *file, block *image_array, short start, short end);
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void wfreesprites (block *image_array, short start, short end);
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void wcopyscreen (short x, short y, short x2, short y2, block source, short destx, short desty, block dest);
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@ -1,5 +1,7 @@
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#include "wgt.h"
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#define fastcopy memcpy
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void wsetscreen (block image)
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{
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if (image == NULL)
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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 wcopyscreen (short x, short y, short x2, short y2, block source, short destx, short desty, block dest)
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{
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unsigned int swidth, dwidth;
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short width, height, display;
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short ctr; /* Y line counter */
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if (source == NULL)
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{
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source = abuf; /* Set to visual screen */
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swidth = 320;
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}
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else {
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swidth = *source;
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source += 2; /* Skip over width and height */
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}
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width = abs (x - x2) + 1; /* Width of each row to copy */
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height = abs (y - y2) + 1; /* Height of area to copy */
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if (destx + width > bx)
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display = bx + 1 - destx;
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else display = width; /* Clip width */
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if (height > (by + 1 - desty))
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height = (by + 1 - desty);
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source += x + (y * swidth); /* Clip height */
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if (desty < ty)
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{
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source += (ty - desty) * swidth;
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height -= ty - desty;
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desty = ty;
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} /* clip y */
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if (destx < tx)
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{
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source += tx - destx;
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display -= tx - destx;
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destx = tx;
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} /* clip x */
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if (dest == NULL)
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{
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dest = abuf; /* Set to visual screen */
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dwidth = 320;
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}
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else
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{
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dwidth = *dest;
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dest += 2;
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}
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/* Skip over width & height in image data */
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dest += destx + (desty * dwidth); /* Find row offset in image data */
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if ((height > 0) && (display > 0))
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for (ctr = y; ctr < y + height; ctr++)
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{
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fastcopy (dest, source, display); /* Copy DISPLAY bytes to dest */
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source += swidth; /* Advance one row */
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dest += dwidth;
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}
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}
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