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//! Pixel and framebuffer utilities
const boot = @import("../../boot/multiboot/multiboot.zig");
const color = @import("color.zig");
const video = @import("../../common/constants/video.zig");
pub inline fn ptr_32(addr: u64) [*]volatile u32 {
return @as([*]volatile u32, @ptrFromInt(addr));
}
pub inline fn ptr_8(addr: u64) [*]volatile u8 {
return @as([*]volatile u8, @ptrFromInt(addr));
}
pub inline fn offset_32(fb: boot.FramebufferInfo, x: u32, y: u32) usize {
return y * (fb.pitch / video.BYTES_PER_PIXEL_32) + x;
}
pub inline fn offset_24(fb: boot.FramebufferInfo, x: u32, y: u32) usize {
return y * fb.pitch + x * video.BYTES_PER_PIXEL_24;
}
pub inline fn pixels_per_row(fb: boot.FramebufferInfo) u32 {
return fb.pitch / video.BYTES_PER_PIXEL_32;
}
pub fn put(fb: boot.FramebufferInfo, x: u32, y: u32, c: u32) void {
if (x >= fb.width or y >= fb.height) return;
if (fb.bpp == video.BPP_32) {
put_32(fb, x, y, c);
} else if (fb.bpp == video.BPP_24) {
put_24(fb, x, y, c);
}
}
pub fn put_32(fb: boot.FramebufferInfo, x: u32, y: u32, c: u32) void {
const pixels = ptr_32(fb.addr);
pixels[offset_32(fb, x, y)] = c;
}
pub fn put_24(fb: boot.FramebufferInfo, x: u32, y: u32, c: u32) void {
const pixels = ptr_8(fb.addr);
const off = offset_24(fb, x, y);
const rgb = color.extract(c);
pixels[off] = rgb.b;
pixels[off + 1] = rgb.g;
pixels[off + 2] = rgb.r;
}
pub fn fill(fb: boot.FramebufferInfo, c: u32) void {
if (fb.bpp == video.BPP_32) {
fill_32(fb, c);
} else if (fb.bpp == video.BPP_24) {
fill_24(fb, c);
}
}
pub fn fill_32(fb: boot.FramebufferInfo, c: u32) void {
const pixels = ptr_32(fb.addr);
const total = fb.width * fb.height;
var i: usize = 0;
while (i < total) : (i += 1) {
pixels[i] = c;
}
}
pub fn fill_24(fb: boot.FramebufferInfo, c: u32) void {
const pixels = ptr_8(fb.addr);
const rgb = color.extract(c);
var y: u32 = 0;
while (y < fb.height) : (y += 1) {
var x: u32 = 0;
while (x < fb.width) : (x += 1) {
const off = offset_24(fb, x, y);
pixels[off] = rgb.b;
pixels[off + 1] = rgb.g;
pixels[off + 2] = rgb.r;
}
}
}
pub fn fill_rect(fb: boot.FramebufferInfo, x: u32, y: u32, w: u32, h: u32, c: u32) void {
if (fb.bpp == video.BPP_32) {
fill_rect_32(fb, x, y, w, h, c);
} else if (fb.bpp == video.BPP_24) {
fill_rect_24(fb, x, y, w, h, c);
}
}
pub fn fill_rect_32(fb: boot.FramebufferInfo, x: u32, y: u32, w: u32, h: u32, c: u32) void {
const pixels = ptr_32(fb.addr);
var row: u32 = 0;
while (row < h) : (row += 1) {
var col: u32 = 0;
while (col < w) : (col += 1) {
const px = x + col;
const py = y + row;
if (px < fb.width and py < fb.height) {
pixels[offset_32(fb, px, py)] = c;
}
}
}
}
pub fn fill_rect_24(fb: boot.FramebufferInfo, x: u32, y: u32, w: u32, h: u32, c: u32) void {
const pixels = ptr_8(fb.addr);
const rgb = color.extract(c);
var row: u32 = 0;
while (row < h) : (row += 1) {
var col: u32 = 0;
while (col < w) : (col += 1) {
const px = x + col;
const py = y + row;
if (px < fb.width and py < fb.height) {
const off = offset_24(fb, px, py);
pixels[off] = rgb.b;
pixels[off + 1] = rgb.g;
pixels[off + 2] = rgb.r;
}
}
}
}
pub fn copy_row(fb: boot.FramebufferInfo, dst_y: u32, src_y: u32) void {
if (fb.bpp == video.BPP_32) {
copy_row_32(fb, dst_y, src_y);
} else if (fb.bpp == video.BPP_24) {
copy_row_24(fb, dst_y, src_y);
}
}
pub fn copy_row_32(fb: boot.FramebufferInfo, dst_y: u32, src_y: u32) void {
const pixels = ptr_32(fb.addr);
const ppr = pixels_per_row(fb);
var x: u32 = 0;
while (x < fb.width) : (x += 1) {
pixels[dst_y * ppr + x] = pixels[src_y * ppr + x];
}
}
pub fn copy_row_24(fb: boot.FramebufferInfo, dst_y: u32, src_y: u32) void {
const pixels = ptr_8(fb.addr);
var x: u32 = 0;
while (x < fb.width) : (x += 1) {
const src_off = offset_24(fb, x, src_y);
const dst_off = offset_24(fb, x, dst_y);
pixels[dst_off] = pixels[src_off];
pixels[dst_off + 1] = pixels[src_off + 1];
pixels[dst_off + 2] = pixels[src_off + 2];
}
}
pub fn clear_row(fb: boot.FramebufferInfo, y: u32, c: u32) void {
if (fb.bpp == video.BPP_32) {
clear_row_32(fb, y, c);
} else if (fb.bpp == video.BPP_24) {
clear_row_24(fb, y, c);
}
}
pub fn clear_row_32(fb: boot.FramebufferInfo, y: u32, c: u32) void {
const pixels = ptr_32(fb.addr);
const ppr = pixels_per_row(fb);
var x: u32 = 0;
while (x < fb.width) : (x += 1) {
pixels[y * ppr + x] = c;
}
}
pub fn clear_row_24(fb: boot.FramebufferInfo, y: u32, c: u32) void {
const pixels = ptr_8(fb.addr);
const rgb = color.extract(c);
var x: u32 = 0;
while (x < fb.width) : (x += 1) {
const off = offset_24(fb, x, y);
pixels[off] = rgb.b;
pixels[off + 1] = rgb.g;
pixels[off + 2] = rgb.r;
}
}
pub fn line_width(fb: boot.FramebufferInfo) u32 {
if (fb.bpp == video.BPP_32) {
return fb.pitch / video.BYTES_PER_PIXEL_32;
} else if (fb.bpp == video.BPP_24) {
return fb.pitch / video.BYTES_PER_PIXEL_24;
}
return fb.width;
}
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