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#define FBGL_IMPLEMENTATION
#include "fbgl.h"
int main(int argc, char *argv[])
{
fbgl_t buffer;
if (fbgl_init("/dev/fb0", &buffer) == -1) {
fprintf(stdout, "Error: could not open framebuffer device\n");
return -1;
}
fbgl_set_bg(&buffer, 0xFFFFFF); // Set the background to white
fbgl_point_t start = { 100, 100 };
fbgl_point_t end = { 200, 200 };
fbgl_draw_rectangle_outline(start, end, 0xFF0000,
&buffer); // Draw red rectangle outline
fbgl_point_t start2 = { 600, 400 };
fbgl_point_t end2 = { 800, 800 };
uint32_t colors[] = { 0xFFC00, 0x00FF00, 0x0000FF,
0xFF00FF }; // Yellow, Green, Blue, Magenta
size_t color_index = 0;
// Initial position of the marquee rectangle
int dx = 15; // Horizontal speed
int dy = 8; // Vertical speed
while (1) {
// Clear the framebuffer (set background)
fbgl_set_bg(&buffer, 0xFFFFFF);
// Draw the moving filled rectangle
fbgl_draw_rectangle_filled(start2, end2, colors[color_index],
&buffer);
// Move the filled rectangle by updating its position
start2.x += dx;
end2.x += dx;
start2.y += dy;
end2.y += dy;
// Reverse direction if the rectangle hits the screen boundary
if (start2.x <= 0 || end2.x >= buffer.width) {
dx = -dx;
color_index++;
}
if (start2.y <= 0 || end2.y >= buffer.height) {
dy = -dy;
color_index++;
}
if (color_index >= 4) {
color_index = 0;
}
usleep(50000); // Delay to make the animation visible (adjust as needed)
}
fbgl_destroy(&buffer);
return 0;
}
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