[feature] basic shapes

3 files changed, 115 insertions, 2 deletions

diff --git a/example/rectangle.c b/example/rectangle.c
new file mode 100644
index 0000000..73f9c4b
--- /dev/null
+++ b/example/rectangle.c
@@ -0,0 +1,59 @@
+#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;
+}
diff --git a/example/red.c b/example/red.c
new file mode 100644
index 0000000..274bc31
--- /dev/null
+++ b/example/red.c
@@ -0,0 +1,13 @@
+#define FBGL_IMPLEMENTATION
+#include "../fbgl.h"
+#include <stdio.h>
+
+int main(int argc, char *argv[])
+{
+    fbgl_t fb;
+    fbgl_init("/dev/fb0", &fb);
+    fbgl_set_bg(&fb, 0xFF0000);
+    while(1){}
+    
+    return 0;
+}
diff --git a/fbgl.h b/fbgl.h
index 2ef68f6..00a8f11 100644
--- a/fbgl.h
+++ b/fbgl.h
@@ -117,7 +117,7 @@ void fbgl_destroy(fbgl_t *fb);
 */
 void fbgl_clear(uint32_t color);
 void fbgl_put_pixel(int x, int y, uint32_t color, fbgl_t *fb);
-void fbgl_draw_line(fbgl_point_t x, fbgl_point_t y, uint32_t color, fbgl_t* fb);
+void fbgl_draw_line(fbgl_point_t x, fbgl_point_t y, uint32_t color, fbgl_t *fb);
 void fbgl_set_bg();
 
 /**
@@ -132,6 +132,16 @@ uint32_t *fb_get_data(void);
 int fb_get_width(void);
 int fb_get_height(void);
 
+/**
+* Shapes
+*/
+void fbgl_draw_rectangle_outline(fbgl_point_t top_left,
+				 fbgl_point_t bottom_right, uint32_t color,
+				 fbgl_t *fb);
+void fbgl_draw_rectangle_filled(fbgl_point_t top_left,
+				fbgl_point_t bottom_right, uint32_t color,
+				fbgl_t *fb);
+
 #ifdef FBGL_IMPLEMENTATION
 
 char const *fbgl_name_info(void)
@@ -364,7 +374,8 @@ void fbgl_render_freetype_text(fbgl_t *fb, FT_Library library, FT_Face face,
 }
 
 #endif // FBGL_USE_FREETYPE
-void fbgl_draw_line(fbgl_point_t x, fbgl_point_t y, uint32_t color, fbgl_t *buffer)
+void fbgl_draw_line(fbgl_point_t x, fbgl_point_t y, uint32_t color,
+		    fbgl_t *buffer)
 {
 	int dx = abs(y.x - x.x);
 	int dy = abs(y.y - x.y);
@@ -395,6 +406,36 @@ void fbgl_draw_line(fbgl_point_t x, fbgl_point_t y, uint32_t color, fbgl_t *buff
 		}
 	}
 }
+void fbgl_draw_rectangle_outline(fbgl_point_t top_left, fbgl_point_t bottom_right, uint32_t color, fbgl_t *fb) {
+    // Top horizontal line
+    for (int x = top_left.x; x < bottom_right.x; x++) {
+        fbgl_put_pixel(x, top_left.y, color, fb);
+    }
+
+    // Bottom horizontal line
+    for (int x = top_left.x; x < bottom_right.x; x++) {
+        fbgl_put_pixel(x, bottom_right.y - 1, color, fb);
+    }
+
+    // Left vertical line
+    for (int y = top_left.y; y < bottom_right.y; y++) {
+        fbgl_put_pixel(top_left.x, y, color, fb);
+    }
+
+    // Right vertical line
+    for (int y = top_left.y; y < bottom_right.y; y++) {
+        fbgl_put_pixel(bottom_right.x - 1, y, color, fb);
+    }
+}
+
+void fbgl_draw_rectangle_filled(fbgl_point_t top_left, fbgl_point_t bottom_right, uint32_t color, fbgl_t *fb) {
+    for (int y = top_left.y; y < bottom_right.y; y++) {
+        // Manually set each pixel in the row
+        for (int x = top_left.x; x < bottom_right.x; x++) {
+            fbgl_put_pixel(x, y, color, fb);
+        }
+    }
+}
 
 #ifdef __cplusplus
 } // extern "C"