acadia/sys/teton/framebuffer/framebuffer.cpp

#include "framebuffer/framebuffer.h"

Framebuffer::Framebuffer(const FramebufferInfo& info) : fb_info_(info) {
  uint64_t buff_size_bytes = fb_info_.height() * fb_info_.pitch();
  fb_memory_ = OwnedMemoryRegion::DirectPhysical(fb_info_.address_phys(),
                                                 buff_size_bytes);
  fb_ = reinterpret_cast<uint32_t*>(fb_memory_.vaddr());
}

void Framebuffer::DrawPixel(uint32_t row, uint32_t col, uint32_t pixel) {
  // Div by 4 because pitch is in bytes and fb_ is a 32bit array.
  fb_[(row * fb_info_.pitch() / 4) + col] = pixel;
}