1 files changed, 40 insertions, 0 deletions
diff --git a/kernel/source/framebuffer.cpp b/kernel/source/framebuffer.cpp
new file mode 100644
index 0000000..ab1b3d7
--- /dev/null
+++ b/kernel/source/framebuffer.cpp
@@ -0,0 +1,40 @@
+#include <hilbert/kernel/application.hpp>
+#include <hilbert/kernel/framebuffer.hpp>
+
+namespace hilbert::kernel::framebuffer {
+
+  uint64_t paddr;
+  static uint32_t *vaddr;
+  int width;
+  int height;
+  int dword_pitch;
+
+  void init_framebuffer(uint64_t paddr, uint64_t vaddr,
+    uint64_t width, uint64_t height, uint64_t pitch
+  ) {
+
+    //TODO: assumes 32-bpp rgb
+
+    framebuffer::paddr = paddr;
+    framebuffer::vaddr = (uint32_t *)vaddr;
+    framebuffer::width = width;
+    framebuffer::height = height;
+    dword_pitch = pitch / 4;
+
+  }
+
+  color encode_color(uint8_t r, uint8_t g, uint8_t b) {
+    return ((uint32_t)r << 16) | ((uint32_t)g << 8) | (uint32_t)b;
+  }
+
+  void set_pixel(int x, int y, color c) {
+    vaddr[y * dword_pitch + x] = c;
+  }
+
+  void fill_color(color c) {
+    for (int y = 0; y < height; ++y)
+      for (int x = 0; x < width; ++x)
+        vaddr[y * dword_pitch + x] = c;
+  }
+
+}