47 lines
1.3 KiB
Rust
47 lines
1.3 KiB
Rust
use mammoth::{mem::MemoryRegion, zion::ZError};
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use yellowstone_yunq::FramebufferInfo;
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pub struct Framebuffer {
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fb_info: FramebufferInfo,
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memory_region: MemoryRegion,
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}
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impl Framebuffer {
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pub fn from_info(fb_info: FramebufferInfo) -> Result<Self, ZError> {
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let size = fb_info.height * fb_info.pitch;
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let memory_region = MemoryRegion::direct_physical(fb_info.address_phys, size)?;
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Ok(Self {
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fb_info,
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memory_region,
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})
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}
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fn draw_pixel(&mut self, row: u32, col: u32, pixel: u32) {
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let index = row * (self.fb_info.pitch as u32 / 4) + col;
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self.memory_region.mut_slice()[index as usize] = pixel;
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}
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pub fn draw_glyph(&mut self, glyph: &[u8], row: u32, col: u32) {
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let gl_width = 8;
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let gl_height = 16;
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#[allow(clippy::needless_range_loop)]
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for r in 0..gl_height {
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for c in 0..gl_width {
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if ((glyph[r] >> c) % 2) == 1 {
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self.draw_pixel(row + (r as u32), col + (gl_width - c - 1), 0xFFFFFFFF);
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} else {
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self.draw_pixel(row + (r as u32), col + (gl_width - c - 1), 0);
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}
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}
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}
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}
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pub fn width(&self) -> u32 {
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self.fb_info.width as u32
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}
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pub fn height(&self) -> u32 {
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self.fb_info.height as u32
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}
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}
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