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6 changed files with 80 additions and 29 deletions

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@ -17,6 +17,10 @@ namespace Kernel
void set_pixel(uint32_t x, uint32_t y, uint32_t rgb); void set_pixel(uint32_t x, uint32_t y, uint32_t rgb);
// positive rows -> empty pixels on bottom
// negative rows -> empty pixels on top
void scroll(int32_t rows, uint32_t rgb);
void sync_pixels_full(); void sync_pixels_full();
void sync_pixels_linear(uint32_t first_pixel, uint32_t pixel_count); void sync_pixels_linear(uint32_t first_pixel, uint32_t pixel_count);
void sync_pixels_rectangle(uint32_t top_right_x, uint32_t top_right_y, uint32_t width, uint32_t height); void sync_pixels_rectangle(uint32_t top_right_x, uint32_t top_right_y, uint32_t width, uint32_t height);

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@ -15,6 +15,7 @@ namespace Kernel
virtual uint32_t height() const override { return m_framebuffer_device->height() / font().height(); } virtual uint32_t height() const override { return m_framebuffer_device->height() / font().height(); }
virtual void putchar_at(uint16_t, uint32_t, uint32_t, Color, Color) override; virtual void putchar_at(uint16_t, uint32_t, uint32_t, Color, Color) override;
virtual bool scroll(Color) override;
virtual void clear(Color) override; virtual void clear(Color) override;
virtual void set_cursor_position(uint32_t, uint32_t) override; virtual void set_cursor_position(uint32_t, uint32_t) override;

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@ -31,6 +31,7 @@ namespace Kernel
virtual uint32_t height() const = 0; virtual uint32_t height() const = 0;
virtual void putchar_at(uint16_t, uint32_t, uint32_t, Color, Color) = 0; virtual void putchar_at(uint16_t, uint32_t, uint32_t, Color, Color) = 0;
virtual bool scroll(Color) { return false; }
virtual void clear(Color) = 0; virtual void clear(Color) = 0;
virtual void set_cursor_position(uint32_t, uint32_t) = 0; virtual void set_cursor_position(uint32_t, uint32_t) = 0;

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@ -135,20 +135,28 @@ namespace Kernel
video_buffer_u8[(y * m_width + x) * (BANAN_FB_BPP / 8) + 3] = rgb >> 24; video_buffer_u8[(y * m_width + x) * (BANAN_FB_BPP / 8) + 3] = rgb >> 24;
} }
void FramebufferDevice::scroll(int32_t rows, uint32_t rgb)
{
if (rows == 0)
return;
rows = BAN::Math::clamp<int32_t>(rows, -m_height, m_height);
const uint32_t abs_rows = BAN::Math::abs(rows);
auto* video_buffer_u8 = reinterpret_cast<uint8_t*>(m_video_buffer->vaddr());
uint8_t* src = (rows < 0) ? video_buffer_u8 : &video_buffer_u8[(abs_rows * m_width) * (BANAN_FB_BPP / 8)];
uint8_t* dst = (rows > 0) ? video_buffer_u8 : &video_buffer_u8[(abs_rows * m_width) * (BANAN_FB_BPP / 8)];
memmove(dst, src, (m_height - abs_rows) * m_width * (BANAN_FB_BPP / 8));
uint32_t start_y = (rows < 0) ? 0 : m_height - abs_rows;
uint32_t stop_y = (rows < 0) ? abs_rows : m_height;
for (uint32_t y = start_y; y < stop_y; y++)
for (uint32_t x = 0; x < m_width; x++)
set_pixel(x, y, rgb);
}
void FramebufferDevice::sync_pixels_full() void FramebufferDevice::sync_pixels_full()
{ {
auto* video_memory_u8 = reinterpret_cast<uint8_t*>(m_video_memory_vaddr); return sync_pixels_linear(0, m_width * m_height);
auto* video_buffer_u8 = reinterpret_cast<uint8_t*>(m_video_buffer->vaddr());
for (uint32_t i = 0; i < m_width * m_height; i++)
{
uint32_t row = i / m_width;
uint32_t idx = i % m_width;
video_memory_u8[(row * m_pitch) + (idx * m_bpp / 8) + 0] = video_buffer_u8[i * (BANAN_FB_BPP / 8) + 0];
video_memory_u8[(row * m_pitch) + (idx * m_bpp / 8) + 1] = video_buffer_u8[i * (BANAN_FB_BPP / 8) + 1];
video_memory_u8[(row * m_pitch) + (idx * m_bpp / 8) + 2] = video_buffer_u8[i * (BANAN_FB_BPP / 8) + 2];
}
} }
void FramebufferDevice::sync_pixels_linear(uint32_t first_pixel, uint32_t pixel_count) void FramebufferDevice::sync_pixels_linear(uint32_t first_pixel, uint32_t pixel_count)
@ -161,6 +169,38 @@ namespace Kernel
auto* video_memory_u8 = reinterpret_cast<uint8_t*>(m_video_memory_vaddr); auto* video_memory_u8 = reinterpret_cast<uint8_t*>(m_video_memory_vaddr);
auto* video_buffer_u8 = reinterpret_cast<uint8_t*>(m_video_buffer->vaddr()); auto* video_buffer_u8 = reinterpret_cast<uint8_t*>(m_video_buffer->vaddr());
if (m_bpp == BANAN_FB_BPP)
{
const uint32_t buffer_pitch = m_width * (BANAN_FB_BPP / 8);
uint32_t row = first_pixel / m_width;
if (auto rem = first_pixel % m_width)
{
const uint32_t to_copy = BAN::Math::min(pixel_count, m_width - rem);
memcpy(
&video_memory_u8[row * m_pitch + rem * (BANAN_FB_BPP / 8)],
&video_buffer_u8[row * buffer_pitch + rem * (BANAN_FB_BPP / 8)],
to_copy * (BANAN_FB_BPP / 8)
);
pixel_count -= to_copy;
row++;
}
while (pixel_count)
{
const uint32_t to_copy = BAN::Math::min(pixel_count, m_width);
memcpy(
&video_memory_u8[row * m_pitch],
&video_buffer_u8[row * buffer_pitch],
to_copy * (BANAN_FB_BPP / 8)
);
pixel_count -= to_copy;
row++;
}
return;
}
for (uint32_t i = 0; i < pixel_count; i++) for (uint32_t i = 0; i < pixel_count; i++)
{ {
uint32_t row = (first_pixel + i) / m_width; uint32_t row = (first_pixel + i) / m_width;
@ -181,18 +221,8 @@ namespace Kernel
if (top_right_y + height > m_height) if (top_right_y + height > m_height)
height = m_height - top_right_y; height = m_height - top_right_y;
auto* video_memory_u8 = reinterpret_cast<uint8_t*>(m_video_memory_vaddr);
auto* video_buffer_u8 = reinterpret_cast<uint8_t*>(m_video_buffer->vaddr());
for (uint32_t row = top_right_y; row < top_right_y + height; row++) for (uint32_t row = top_right_y; row < top_right_y + height; row++)
{ sync_pixels_linear(row * m_width + top_right_x, width);
for (uint32_t idx = top_right_x; idx < top_right_x + width; idx++)
{
video_memory_u8[(row * m_pitch) + (idx * m_bpp / 8) + 0] = video_buffer_u8[(row * m_width + idx) * (BANAN_FB_BPP / 8) + 0];
video_memory_u8[(row * m_pitch) + (idx * m_bpp / 8) + 1] = video_buffer_u8[(row * m_width + idx) * (BANAN_FB_BPP / 8) + 1];
video_memory_u8[(row * m_pitch) + (idx * m_bpp / 8) + 2] = video_buffer_u8[(row * m_width + idx) * (BANAN_FB_BPP / 8) + 2];
}
}
} }
class FramebufferMemoryRegion : public MemoryRegion class FramebufferMemoryRegion : public MemoryRegion

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@ -33,6 +33,13 @@ namespace Kernel
m_framebuffer_device->sync_pixels_rectangle(x, y, font().width(), font().height()); m_framebuffer_device->sync_pixels_rectangle(x, y, font().width(), font().height());
} }
bool FramebufferTerminalDriver::scroll(Color color)
{
m_framebuffer_device->scroll(font().height(), color.rgb);
m_framebuffer_device->sync_pixels_full();
return true;
}
void FramebufferTerminalDriver::clear(Color color) void FramebufferTerminalDriver::clear(Color color)
{ {
for (uint32_t y = 0; y < m_framebuffer_device->height(); y++) for (uint32_t y = 0; y < m_framebuffer_device->height(); y++)

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@ -99,8 +99,8 @@ namespace Kernel
render_from_buffer(last_x, last_y); render_from_buffer(last_x, last_y);
if (m_show_cursor) if (m_show_cursor)
m_terminal_driver->set_cursor_position(x, y); m_terminal_driver->set_cursor_position(x, y);
last_x = m_column = x; last_x = x;
last_y = m_row = y; last_y = y;
} }
void VirtualTTY::reset_ansi() void VirtualTTY::reset_ansi()
@ -410,10 +410,18 @@ namespace Kernel
for (uint32_t x = 0; x < m_width; x++) for (uint32_t x = 0; x < m_width; x++)
m_buffer[(m_height - 1) * m_width + x] = { .foreground = m_foreground, .background = m_background, .codepoint = ' ' }; m_buffer[(m_height - 1) * m_width + x] = { .foreground = m_foreground, .background = m_background, .codepoint = ' ' };
// Render the whole buffer to the screen // hide cursor during scrolling
bool old_show_cursor = m_show_cursor;
m_show_cursor = false;
set_cursor_position(0, 0);
if (!m_terminal_driver->scroll(m_background))
{
// No fast scrolling, render the whole buffer to the screen
for (uint32_t y = 0; y < m_height; y++) for (uint32_t y = 0; y < m_height; y++)
for (uint32_t x = 0; x < m_width; x++) for (uint32_t x = 0; x < m_width; x++)
render_from_buffer(x, y); render_from_buffer(x, y);
}
m_show_cursor = old_show_cursor;
m_column = 0; m_column = 0;
m_row--; m_row--;