Merge branch 'main' of https://github.com/kenshineto/kern into fat32

Merging main into here

1 files changed, 79 insertions, 0 deletions

diff --git a/user/apple.c b/user/apple.c
new file mode 100644
index 0000000..a0a7e9a
--- /dev/null
+++ b/user/apple.c
@@ -0,0 +1,79 @@
+
+#include <incbin.h>
+#include <stdio.h>
+#include <unistd.h>
+
+INCBIN(APPLE, "data/apple.bin");
+
+#define APPLE_WIDTH 256
+#define APPLE_HEIGHT 144
+#define APPLE_FPS 12
+#define APPLE_FRAMES 2630
+
+#define MIN(a, b) (((a) < (b)) ? (a) : (b))
+
+// returned from drm
+static uint32_t *fb;
+static int width, height, bpp, scale;
+
+// meta
+static size_t frame = 0;
+static size_t frame_size;
+static size_t ticks_off;
+
+#define PIXEL(x, y)                                         \
+	gAPPLEData[offset +                                     \
+			   (((x + APPLE_WIDTH % APPLE_WIDTH) / scale) + \
+				((y + APPLE_HEIGHT % APPLE_HEIGHT) / scale) * APPLE_WIDTH)]
+
+static void draw_frame(void)
+{
+	size_t offset = frame_size * frame;
+
+	for (int y = 0; y < APPLE_HEIGHT * scale; y++) {
+		for (int x = 0; x < APPLE_WIDTH * scale; x++) {
+			uint8_t colors[9];
+			colors[0] = PIXEL(x, y);
+			colors[1] = PIXEL(x - 1, y);
+			colors[2] = PIXEL(x + 1, y);
+			colors[3] = PIXEL(x, y - 1);
+			colors[4] = PIXEL(x - 1, y - 1);
+			colors[5] = PIXEL(x + 1, y - 1);
+			colors[6] = PIXEL(x, y + 1);
+			colors[7] = PIXEL(x - 1, y + 1);
+			colors[8] = PIXEL(x + 1, y + 1);
+
+			// anti aliasing
+			uint8_t color = (colors[0] + colors[0] + colors[0] + colors[0] +
+							 colors[1] + colors[2] + colors[3] + colors[4] +
+							 colors[5] + colors[6] + colors[7] + colors[8]) /
+							12;
+
+			fb[x + y * width] = (color << 16) | (color << 8) | (color << 0);
+		}
+	}
+
+	frame = ((ticks() - ticks_off) / (1000 / APPLE_FPS));
+
+	if (frame >= APPLE_FRAMES)
+		exit(0);
+}
+
+int main(void)
+{
+	printf("all your apple belong to bad\n");
+
+	if (drm((void **)&fb, &width, &height, &bpp)) {
+		fprintf(stderr, "failure!\n");
+		return 1;
+	}
+
+	ticks_off = ticks();
+	frame_size = APPLE_WIDTH * APPLE_HEIGHT;
+	scale = MIN(width / APPLE_WIDTH, height / APPLE_HEIGHT);
+
+	while (1)
+		draw_frame();
+
+	return 0;
+}