kernel/source/framebuffer.cpp


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#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;
  }

}