59 lines
1.7 KiB
C++
59 lines
1.7 KiB
C++
#include <mercury/kernel/framebuffer.hpp>
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namespace mercury::kernel::framebuffer {
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uint32_t *vaddr;
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int width;
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int height;
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int dword_pitch;
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void init_framebuffer(
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uint64_t vaddr, uint64_t width, uint64_t height, uint64_t pitch
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) {
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//TODO: assumes 32-bpp rgb
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framebuffer::vaddr = (uint32_t *)vaddr;
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framebuffer::width = width;
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framebuffer::height = height;
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dword_pitch = pitch / 4;
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}
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color encode_color(uint8_t r, uint8_t g, uint8_t b) {
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return ((uint32_t)r << 16) | ((uint32_t)g << 8) | (uint32_t)b;
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}
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void set_pixel(int x, int y, color c) {
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vaddr[y * dword_pitch + x] = c;
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}
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void move_region(
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int from_start_x, int from_start_y, int from_end_x,
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int from_end_y, int to_start_x, int to_start_y
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) {
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int region_width = from_end_x - from_start_x;
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int region_height = from_end_y - from_start_y;
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int from_start_offset = from_start_y * dword_pitch + from_start_x;
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int to_start_offset = to_start_y * dword_pitch + to_start_x;
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if (from_start_offset > to_start_offset)
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for (int y = 0; y < region_height; ++y)
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for (int x = 0; x < region_width; ++x)
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vaddr[to_start_offset + y * dword_pitch + x] =
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vaddr[from_start_offset + y * dword_pitch + x];
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else if (from_start_offset < to_start_offset)
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for (int y = region_height - 1; y >= 0; --y)
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for (int x = region_width - 1; x >= 0; --x)
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vaddr[to_start_offset + y * dword_pitch + x] =
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vaddr[from_start_offset + y * dword_pitch + x];
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}
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void fill_region(int start_x, int start_y, int end_x, int end_y, color c) {
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for (int y = start_y; y < end_y; ++y)
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for (int x = start_x; x < end_x; ++x)
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vaddr[y * dword_pitch + x] = c;
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}
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}
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