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LibGUI: Add copy_rect API 

This allows moving parts of window around
This commit is contained in:
Bananymous 2025-04-17 23:14:46 +03:00
parent 88abbd90dc
commit 3ca0ef1583
2 changed files with 25 additions and 0 deletions
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21
userspace/libraries/LibGUI/Window.cpp
View File

@ -211,6 +211,27 @@ namespace LibGUI
set_pixel(x, dst_y + fill_y_off + i, fill_color);
}
void Window::copy_rect(int32_t dst_x, int32_t dst_y, int32_t src_x, int32_t src_y, uint32_t width, uint32_t height, uint32_t fill_color)
{
fill_rect(dst_x, dst_y, width, height, fill_color);
if (!clamp_to_framebuffer(dst_x, dst_y, width, height))
return;
if (!clamp_to_framebuffer(src_x, src_y, width, height))
return;
const bool copy_dir = dst_y < src_y;
for (uint32_t i = 0; i < height; i++)
{
const uint32_t y_off = copy_dir ? i : height - i - 1;
memmove(
&m_framebuffer[(dst_y + y_off) * this->width()],
&m_framebuffer[(src_y + y_off) * this->width()],
width * 4
);
}
}
bool Window::clamp_to_framebuffer(int32_t& signed_x, int32_t& signed_y, uint32_t& width, uint32_t& height) const
{
int32_t min_x = BAN::Math::max<int32_t>(signed_x, 0);

4
userspace/libraries/LibGUI/include/LibGUI/Window.h
View File

@ -59,6 +59,10 @@ namespace LibGUI
// fill_color is used when copying data outside of window bounds
void copy_horizontal_slice(int32_t dst_y, int32_t src_y, uint32_t amount, uint32_t fill_color);
// copy rect (src_x, src_y, width, height) to (dst_x, dst_y, width, height)
// fill_color is used when copying data outside of window bounds
void copy_rect(int32_t dst_x, int32_t dst_y, int32_t src_x, int32_t src_y, uint32_t width, uint32_t height, uint32_t fill_color);
void invalidate(int32_t x, int32_t y, uint32_t width, uint32_t height);
void invalidate() { return invalidate(0, 0, width(), height()); }