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ableos/sysdata/test-programs/limine_framebuffer_driver.rhai

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// Change and add to this as you see fit.
// The STD and even syscalls are still in flux.
// Do your best to avoid adding bad design.
// Use std abstractions if they exist like logging functionality
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import "sysdata/test-programs/hblib/std" as std;
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fn rect(reg_x, reg_y, w, h, color) {
li64(r3, 0);
li64(r4, 0);
li64(r5, w);
li64(r6, h);
let start_y = label();
let start_x = label();
add64(r9, r3, reg_x);
add64(r10, r4, reg_y);
pixel(r9, r10, color);
li64(r1, 1);
add64(r3, r3, r1);
jltu(r3, r5, start_x);
li64(r1, 1);
add64(r4, r4, r1);
li64(r3, 0);
jltu(r4, r6, start_y);
}
fn pixel(reg_x, reg_y, color) {
let BUFFER = 0xFFFF8000C0000000;
let WIDTH = 1024;
// r1 = y * WIDTH
li64(r1, WIDTH);
mul64(r1, reg_y, r1);
// r2 = x + r2
add64(r2, reg_x, r1);
// r2 = r2 * 4
li64(r1, 4);
mul64(r2, r2, r1);
// store pixel value
li64(r1, color);
st(r1, r2, BUFFER, 4);
}
fn clear() {
// rect(r0, r0, 1024, 768, 0xff222222);
let BUFFER = 0xFFFF8000C0000000;
// on arm the FB is at 0xFFFF8000BC430000
// FIXME: get the framebuffer pointer from the starting arguments
li64(r1, 0xff222222);
li64(r2, 0);
li64(r3, 1);
li64(r4, 1024 * 768);
li64(r5, 4);
let start = label();
mul64(r6, r2, r5);
st(r1, r6, BUFFER, 4);
add64(r2, r2, r3);
jltu(r2, r4, start);
}
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// Define main
fn main(){
// Log the arguments
{
cp(r3, r1);
cp(r4, r2);
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// log level
li8(r6, 2);
add64(r5, r3, r4);
li64(r7, 1);
st(r6, r5, 0, 1);
add64(r4, r4, r7);
li64(r1, 3);
li64(r2, 1);
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eca();
// Zero out all used registers
li64(r1, 0);
li64(r2, 0);
li64(r3, 0);
li64(r4, 0);
li64(r5, 0);
li64(r6, 0);
li64(r7, 0);
}
std::Info("Starting the limine framebuffer driver.");
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// un();
li64(r100, 300);
li64(r101, 300);
li64(r102, 1);
li64(r103, 1);
li64(r104, 1024 - 20);
li64(r105, 768 - 20);
li64(r106, 0);
li64(r107, 0);
clear();
let start = label();
rect(r100, r101, 20, 20, 0xff222222);
//clear();
add64(r100, r100, r102);
add64(r101, r101, r103);
let after_x_right = declabel();
jltu(r100, r104, after_x_right);
li64(r102, -1);
here(after_x_right);
let after_x_left = declabel();
jgtu(r100, r106, after_x_left);
li64(r102, 1);
li64(r100, 0);
here(after_x_left);
let after_y_right = declabel();
jltu(r101, r105, after_y_right);
li64(r103, -1);
here(after_y_right);
let after_y_left = declabel();
jgtu(r101, r107, after_y_left);
li64(r103, 1);
li64(r101, 0);
here(after_y_left);
rect(r100, r101, 20, 20, 0xffffffff);
li64(r200, 0);
li64(r201, 1);
li64(r202, 10000);
let wait = label();
add64(r200, r200, r201);
jltu(r200, r202, wait);
jeq(r0, r0, start);
//jmp(start);
std::Info("done");
// Terminate execution.
tx();
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}
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main();