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//! Hikari Framebuffer
const efi = @import("../efi/efi.zig");
pub const Framebuffer = struct {
base: [*]u32,
width: u32,
height: u32,
stride: u32,
pixel_format: efi.types.graphics.PixelFormat,
pub fn initialize(gop: *efi.protocols.GraphicsOutputProtocol) Framebuffer {
const mode = gop.mode;
const info = mode.info;
return Framebuffer{
.base = @ptrFromInt(mode.framebuffer_base),
.width = info.horizontal_resolution,
.height = info.vertical_resolution,
.stride = info.pixels_per_scan_line,
.pixel_format = info.pixel_format,
};
}
pub fn put_pixel(self: *Framebuffer, x: u32, y: u32, color: Color) void {
if (x >= self.width or y >= self.height) {
return;
}
const offset = y * self.stride + x;
self.base[offset] = color.to_pixel(self.pixel_format);
}
pub fn fill_rect(self: *Framebuffer, x: u32, y: u32, w: u32, h: u32, color: Color) void {
const pixel = color.to_pixel(self.pixel_format);
const x_end = if (x + w > self.width) self.width else x + w;
const y_end = if (y + h > self.height) self.height else y + h;
var py = y;
while (py < y_end) : (py += 1) {
var px = x;
while (px < x_end) : (px += 1) {
const offset = py * self.stride + px;
self.base[offset] = pixel;
}
}
}
pub fn clear(self: *Framebuffer, color: Color) void {
self.fill_rect(0, 0, self.width, self.height, color);
}
pub fn draw_horizontal_line(self: *Framebuffer, x: u32, y: u32, length: u32, color: Color) void {
if (y >= self.height) {
return;
}
const pixel = color.to_pixel(self.pixel_format);
const x_end = if (x + length > self.width) self.width else x + length;
const row_offset = y * self.stride;
var px = x;
while (px < x_end) : (px += 1) {
self.base[row_offset + px] = pixel;
}
}
pub fn draw_vertical_line(self: *Framebuffer, x: u32, y: u32, length: u32, color: Color) void {
if (x >= self.width) {
return;
}
const pixel = color.to_pixel(self.pixel_format);
const y_end = if (y + length > self.height) self.height else y + length;
var py = y;
while (py < y_end) : (py += 1) {
self.base[py * self.stride + x] = pixel;
}
}
pub fn draw_rect(self: *Framebuffer, x: u32, y: u32, w: u32, h: u32, color: Color) void {
self.draw_horizontal_line(x, y, w, color);
self.draw_horizontal_line(x, y + h - 1, w, color);
self.draw_vertical_line(x, y, h, color);
self.draw_vertical_line(x + w - 1, y, h, color);
}
pub fn copy_rect(self: *Framebuffer, src_x: u32, src_y: u32, dst_x: u32, dst_y: u32, w: u32, h: u32) void {
if (src_y < dst_y) {
var row: u32 = h;
while (row > 0) {
row -= 1;
self.copy_row(src_x, src_y + row, dst_x, dst_y + row, w);
}
} else {
var row: u32 = 0;
while (row < h) : (row += 1) {
self.copy_row(src_x, src_y + row, dst_x, dst_y + row, w);
}
}
}
fn copy_row(self: *Framebuffer, src_x: u32, src_y: u32, dst_x: u32, dst_y: u32, w: u32) void {
const src_offset = src_y * self.stride + src_x;
const dst_offset = dst_y * self.stride + dst_x;
if (src_x < dst_x) {
var i: u32 = w;
while (i > 0) {
i -= 1;
self.base[dst_offset + i] = self.base[src_offset + i];
}
} else {
var i: u32 = 0;
while (i < w) : (i += 1) {
self.base[dst_offset + i] = self.base[src_offset + i];
}
}
}
};
pub const Color = struct {
r: u8,
g: u8,
b: u8,
a: u8,
pub fn rgb(r: u8, g: u8, b: u8) Color {
return Color{ .r = r, .g = g, .b = b, .a = 255 };
}
pub fn rgba(r: u8, g: u8, b: u8, a: u8) Color {
return Color{ .r = r, .g = g, .b = b, .a = a };
}
pub fn to_pixel(self: Color, format: efi.types.graphics.PixelFormat) u32 {
return switch (format) {
.rgb => (@as(u32, self.r) << 16) | (@as(u32, self.g) << 8) | self.b,
.bgr => (@as(u32, self.b) << 16) | (@as(u32, self.g) << 8) | self.r,
else => (@as(u32, self.r) << 16) | (@as(u32, self.g) << 8) | self.b,
};
}
pub const black = Color.rgb(0, 0, 0);
pub const white = Color.rgb(255, 255, 255);
pub const red = Color.rgb(255, 0, 0);
pub const green = Color.rgb(0, 255, 0);
pub const blue = Color.rgb(0, 0, 255);
pub const cyan = Color.rgb(0, 255, 255);
pub const magenta = Color.rgb(255, 0, 255);
pub const yellow = Color.rgb(255, 255, 0);
pub const gray = Color.rgb(128, 128, 128);
pub const dark_gray = Color.rgb(64, 64, 64);
pub const light_gray = Color.rgb(192, 192, 192);
};
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