1 files changed, 197 insertions, 0 deletions
diff --git a/mirai.old/utils/graphics/pixel.zig b/mirai.old/utils/graphics/pixel.zig
new file mode 100644
index 0000000..29bd446
--- /dev/null
+++ b/mirai.old/utils/graphics/pixel.zig
@@ -0,0 +1,197 @@
+//! 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;
+}