From 298e4972a9e72842c67c06eb9a23f517b16f411a Mon Sep 17 00:00:00 2001
From: lvntky <klevent1903@gmail.com>
Date: Tue, 26 Nov 2024 11:28:44 +0300
Subject: [test] fps and text rendering example

---
 CMakeLists.txt              |  1 +
 examples/texture_show_fps.c | 96 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 97 insertions(+)
 create mode 100644 examples/texture_show_fps.c

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 10cb5e7..e47cc2c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -30,3 +30,4 @@ add_example(texture)
 add_example(raw_mode)
 add_example(framebuf_info)
 add_example(text)
+add_example(texture_show_fps)
diff --git a/examples/texture_show_fps.c b/examples/texture_show_fps.c
new file mode 100644
index 0000000..0b079c7
--- /dev/null
+++ b/examples/texture_show_fps.c
@@ -0,0 +1,96 @@
+#define FBGL_IMPLEMENTATION
+#include "fbgl.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h> // for usleep
+
+char *float_to_string(float value)
+{
+	// Allocate a buffer large enough for the string representation
+	char *buffer =
+		(char *)malloc(32); // Ensure sufficient size for most floats
+	if (buffer == NULL) {
+		return NULL; // Handle allocation failure
+	}
+
+	// Format the float into the buffer
+	snprintf(buffer, 32, "%.6f", value); // Adjust precision as needed
+	return buffer;
+}
+
+int main(int argc, char **argv)
+{
+	// Initialize framebuffer
+	fbgl_t framebuffer;
+	if (fbgl_init(NULL, &framebuffer) != 0) {
+		fprintf(stderr, "Failed to initialize framebuffer.\n");
+		return EXIT_FAILURE;
+	}
+
+	// Load a TGA texture
+	const char *texture_path = argv[1];
+	fbgl_tga_texture_t *texture = fbgl_load_tga_texture(texture_path);
+	if (!texture) {
+		fprintf(stderr, "Failed to load texture.\n");
+		fbgl_destroy(&framebuffer);
+		return EXIT_FAILURE;
+	}
+
+	// Set a background color (e.g., black)
+	fbgl_set_bg(&framebuffer, 0x000000); // Clear the framebuffer to black
+
+	// Texture movement parameters
+	int texture_x = 0; // Initial horizontal position of the texture
+	int texture_y = 100; // Initial vertical position of the texture
+	int dx = 5; // Horizontal speed (adjust for desired marquee speed)
+	int dy = 3; // Vertical speed (adjust for desired marquee speed)
+
+	// Main rendering loop
+	int framesize = 30 * 30;
+
+	fbgl_psf1_font_t *font = fbgl_load_psf1_font(argv[2]);
+	while (framesize) {
+
+		// Clear the framebuffer (set background)
+		fbgl_set_bg(&framebuffer, 0x000000);
+
+		// Draw the texture at the current position
+		fbgl_draw_texture(&framebuffer, texture, texture_x, texture_y);
+
+		// Move the texture by updating its position
+		texture_x += dx;
+		texture_y += dy;
+
+		// Reverse direction if the texture hits the screen boundary (X-axis)
+		if (texture_x <= 0 ||
+		    texture_x + texture->width >= framebuffer.width) {
+			dx = -dx; // Reverse horizontal direction when hitting the left or right edge
+		}
+
+		// Reverse direction if the texture hits the screen boundary (Y-axis)
+		if (texture_y <= 0 ||
+		    texture_y + texture->height >= framebuffer.height) {
+			dy = -dy; // Reverse vertical direction when hitting the top or bottom edge
+		    }
+
+		    
+		fbgl_render_psf1_text(&framebuffer, font, "FPS: ", 5, 0, 0xFF0000);
+		char *fps = float_to_string(fbgl_get_fps());
+		fbgl_render_psf1_text(&framebuffer, font, fps, 100, 0, 0xFF0000);
+
+		usleep(50000); // Delay to make the marquee effect visible (adjust as needed)
+		framesize--;
+	}
+
+	// Wait for the user to press the escape key before exiting
+	printf("Press ESC to exit...\n");
+	while (!fbgl_check_esc_key()) {
+		// You can add additional rendering logic here if needed
+	}
+
+	// Clean up
+	fbgl_destroy_texture(texture);
+	fbgl_destroy(&framebuffer);
+
+	return EXIT_SUCCESS;
+}
-- 
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