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Kernel: Implement FramebufferDevice::get_pixel()

This commit is contained in:
Bananymous 2025-04-18 02:35:28 +03:00
parent 554b13ac50
commit 994713d04c
2 changed files with 10 additions and 0 deletions
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1
kernel/include/kernel/Device/FramebufferDevice.h
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@ -15,6 +15,7 @@ namespace Kernel
uint32_t width() const { return m_width; }
uint32_t height() const { return m_height; }
uint32_t get_pixel(uint32_t x, uint32_t y) const;
void set_pixel(uint32_t x, uint32_t y, uint32_t rgb);
// positive rows -> empty pixels on bottom

9
kernel/kernel/Device/FramebufferDevice.cpp
View File

@ -125,6 +125,15 @@ namespace Kernel
return bytes_to_copy;
}
uint32_t FramebufferDevice::get_pixel(uint32_t x, uint32_t y) const
{
ASSERT(x < m_width && y < m_height);
const auto* video_buffer_u8 = reinterpret_cast<const uint8_t*>(m_video_buffer->vaddr());
return (video_buffer_u8[(y * m_width + x) * (BANAN_FB_BPP / 8) + 0] << 0)
| (video_buffer_u8[(y * m_width + x) * (BANAN_FB_BPP / 8) + 1] << 8)
| (video_buffer_u8[(y * m_width + x) * (BANAN_FB_BPP / 8) + 2] << 16);
}
void FramebufferDevice::set_pixel(uint32_t x, uint32_t y, uint32_t rgb)
{
if (x >= m_width || y >= m_height)