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#include <mercury/kernel/framebuffer.hpp>
namespace mercury::kernel::framebuffer {
uint32_t *vaddr;
int width;
int height;
int dword_pitch;
void init_framebuffer(
uint64_t vaddr, uint64_t width, uint64_t height, uint64_t pitch
) {
//TODO: assumes 32-bpp rgb
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 move_region(
int from_start_x, int from_start_y, int from_end_x,
int from_end_y, int to_start_x, int to_start_y
) {
int region_width = from_end_x - from_start_x;
int region_height = from_end_y - from_start_y;
int from_start_offset = from_start_y * dword_pitch + from_start_x;
int to_start_offset = to_start_y * dword_pitch + to_start_x;
if (from_start_offset > to_start_offset)
for (int y = 0; y < region_height; ++y)
for (int x = 0; x < region_width; ++x)
vaddr[to_start_offset + y * dword_pitch + x] =
vaddr[from_start_offset + y * dword_pitch + x];
else if (from_start_offset < to_start_offset)
for (int y = region_height - 1; y >= 0; --y)
for (int x = region_width - 1; x >= 0; --x)
vaddr[to_start_offset + y * dword_pitch + x] =
vaddr[from_start_offset + y * dword_pitch + x];
}
void fill_region(int start_x, int start_y, int end_x, int end_y, color c) {
for (int y = start_y; y < end_y; ++y)
for (int x = start_x; x < end_x; ++x)
vaddr[y * dword_pitch + x] = c;
}
}
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