[feature] added keyboard events

3 files changed, 182 insertions, 1 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e47cc2c..69efb9d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -31,3 +31,4 @@ add_example(raw_mode)
 add_example(framebuf_info)
 add_example(text)
 add_example(texture_show_fps)
+add_example(keyboard)
diff --git a/examples/keyboard.c b/examples/keyboard.c
new file mode 100644
index 0000000..51a488e
--- /dev/null
+++ b/examples/keyboard.c
@@ -0,0 +1,91 @@
+#include <stdio.h>
+#include <stdbool.h>
+#define FBGL_IMPLEMENTATION
+#include "fbgl.h"
+
+#define RECT_WIDTH 50
+#define RECT_HEIGHT 30
+#define MOVE_STEP 10
+#define BG_COLOR 0x000000 // Black
+#define RECT_COLOR 0xFFFFFF // White
+
+int main(void)
+{
+    // Initialize framebuffer
+    fbgl_t framebuffer;
+    if (fbgl_init(NULL, &framebuffer) != 0) {
+        fprintf(stderr, "Failed to initialize framebuffer\n");
+        return EXIT_FAILURE;
+    }
+
+    // Initialize keyboard
+    if (fbgl_keyboard_init() != 0) {
+        fprintf(stderr, "Failed to initialize keyboard\n");
+        fbgl_destroy(&framebuffer);
+        return EXIT_FAILURE;
+    }
+
+    atexit(fbgl_keyboard_clean); // Cleanup on exit
+    atexit((void (*)(void))fbgl_destroy, &framebuffer);
+
+    // Initial rectangle position
+    fbgl_point_t top_left = {framebuffer.width / 2 - RECT_WIDTH / 2, framebuffer.height / 2 - RECT_HEIGHT / 2};
+    fbgl_point_t bottom_right = {top_left.x + RECT_WIDTH, top_left.y + RECT_HEIGHT};
+
+    // Main loop
+    while (!fbgl_check_esc_key()) {
+        // Update keyboard state
+        fbgl_keyboard_update();
+
+        // Clear screen
+        fbgl_set_bg(&framebuffer, BG_COLOR);
+
+        // Move rectangle based on key input
+        if (fbgl_key_down('w')) {
+            top_left.y -= MOVE_STEP;
+            bottom_right.y -= MOVE_STEP;
+        }
+        if (fbgl_key_down('s')) {
+            top_left.y += MOVE_STEP;
+            bottom_right.y += MOVE_STEP;
+        }
+        if (fbgl_key_down('a')) {
+            top_left.x -= MOVE_STEP;
+            bottom_right.x -= MOVE_STEP;
+        }
+        if (fbgl_key_down('d')) {
+            top_left.x += MOVE_STEP;
+            bottom_right.x += MOVE_STEP;
+        }
+
+        // Ensure rectangle stays within screen bounds
+        if (top_left.x < 0) {
+            top_left.x = 0;
+            bottom_right.x = RECT_WIDTH;
+        }
+        if (top_left.y < 0) {
+            top_left.y = 0;
+            bottom_right.y = RECT_HEIGHT;
+        }
+        if (bottom_right.x > framebuffer.width) {
+            bottom_right.x = framebuffer.width;
+            top_left.x = framebuffer.width - RECT_WIDTH;
+        }
+        if (bottom_right.y > framebuffer.height) {
+            bottom_right.y = framebuffer.height;
+            top_left.y = framebuffer.height - RECT_HEIGHT;
+        }
+
+        // Draw the rectangle
+        fbgl_draw_rectangle_filled(top_left, bottom_right, RECT_COLOR, &framebuffer);
+
+        // Refresh frame (add a delay if needed)
+        usleep(16000); // ~60 FPS
+    }
+
+    // Cleanup
+    fbgl_keyboard_clean();
+    fbgl_destroy(&framebuffer);
+
+    return EXIT_SUCCESS;
+}
diff --git a/fbgl.h b/fbgl.h
index f34bca0..c511ad2 100644
--- a/fbgl.h
+++ b/fbgl.h
@@ -190,9 +190,9 @@ void fbgl_render_psf1_text(fbgl_t *fb, fbgl_psf1_font_t *font, const char *text,
 int fbgl_keyboard_init(void);
 void fbgl_keyboard_clean(void);
 void fbgl_keyboard_update(void);
+bool fbgl_key_down(unsigned char key);
 bool fbgl_key_pressed(unsigned char key);
 bool fbgl_key_released(unsigned char key);
-bool fbgl_key_down(unsigned char key);
 
 #ifdef FBGL_IMPLEMENTATION
 
@@ -732,6 +732,95 @@ void fbgl_render_psf1_text(fbgl_t *fb, fbgl_psf1_font_t *font, const char *text,
 	}
 }
 
+int fbgl_keyboard_init(void)
+{
+    if (keyboard.is_initialized) {
+        return 0; // Already initialized
+    }
+
+    struct termios raw;
+
+    if (tcgetattr(STDIN_FILENO, &orig_termios) == -1) {
+        perror("tcgetattr");
+        return -1;
+    }
+
+    raw = orig_termios;
+    raw.c_lflag &= ~(ECHO | ICANON); // Disable echo and canonical mode
+    raw.c_cc[VMIN] = 0;             // Non-blocking read
+    raw.c_cc[VTIME] = 0;            // No timeout
+    if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw) == -1) {
+        perror("tcsetattr");
+        return -1;
+    }
+
+    memset(&keyboard, 0, sizeof(fbgl_keyboard_t));
+    keyboard.is_initialized = true;
+    return 0;
+}
+
+void fbgl_keyboard_clean(void)
+{
+    if (!keyboard.is_initialized) {
+        return;
+    }
+
+    if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &orig_termios) == -1) {
+        perror("tcsetattr");
+    }
+
+    keyboard.is_initialized = false;
+}
+
+void fbgl_keyboard_update(void)
+{
+    if (!keyboard.is_initialized) {
+        return;
+    }
+
+    // Copy current state to previous state
+    memcpy(keyboard.prev_keys, keyboard.keys, sizeof(keyboard.keys));
+
+    char c;
+    while (read(STDIN_FILENO, &c, 1) > 0) {
+        if (c >= 0 && c < FBGL_MAX_KEYS) {
+            keyboard.keys[(unsigned char)c] = true;
+        }
+    }
+
+    // Reset keys that are not pressed
+    for (int i = 0; i < FBGL_MAX_KEYS; i++) {
+        if (!keyboard.keys[i]) {
+            keyboard.keys[i] = false;
+        }
+    }
+}
+
+
+bool fbgl_key_down(unsigned char key)
+{
+    if (key >= FBGL_MAX_KEYS) {
+        return false;
+    }
+    return keyboard.keys[key];
+}
+
+bool fbgl_key_pressed(unsigned char key)
+{
+    if (key >= FBGL_MAX_KEYS) {
+        return false;
+    }
+    return keyboard.keys[key] && !keyboard.prev_keys[key];
+}
+
+bool fbgl_key_released(unsigned char key)
+{
+    if (key >= FBGL_MAX_KEYS) {
+        return false;
+    }
+    return !keyboard.keys[key] && keyboard.prev_keys[key];
+}
+
 #endif // FBGL_IMPLEMENTATION
 
 #ifdef __cplusplus