You aint taking this down

source/frontend/gui.c

@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2018-2021 CTCaer
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "../gfx/gfx.h"
+#include <mem/heap.h>
+#include <rtc/max77620-rtc.h>
+#include <storage/nx_sd.h>
+#include <utils/util.h>
+
+#include <string.h>
+
+int save_fb_to_bmp()
+{
+	// Disallow screenshots if less than 2s passed.
+	static u32 timer = 0;
+	if (get_tmr_ms() < timer)
+		return 1;
+
+	const u32 file_size = 0x384000 + 0x36;
+	u8 *bitmap = malloc(file_size);
+	u32 *fb = malloc(0x384000);
+	u32 *fb_ptr = gfx_ctxt.fb;
+
+	// Reconstruct FB for bottom-top, portrait bmp.
+	for (int y = 1279; y > -1; y--)
+	{
+		for (u32 x = 0; x < 720; x++)
+			fb[y * 720 + x] = *fb_ptr++;
+	}
+
+	memcpy(bitmap + 0x36, fb, 0x384000);
+
+	typedef struct _bmp_t
+	{
+		u16 magic;
+		u32 size;
+		u32 rsvd;
+		u32 data_off;
+		u32 hdr_size;
+		u32 width;
+		u32 height;
+		u16 planes;
+		u16 pxl_bits;
+		u32 comp;
+		u32 img_size;
+		u32 res_h;
+		u32 res_v;
+		u64 rsvd2;
+	} __attribute__((packed)) bmp_t;
+
+	bmp_t *bmp = (bmp_t *)bitmap;
+
+	bmp->magic    = 0x4D42;
+	bmp->size     = file_size;
+	bmp->rsvd     = 0;
+	bmp->data_off = 0x36;
+	bmp->hdr_size = 40;
+	bmp->width    = 720;
+	bmp->height   = 1280;
+	bmp->planes   = 1;
+	bmp->pxl_bits = 32;
+	bmp->comp     = 0;
+	bmp->img_size = 0x384000;
+	bmp->res_h    = 2834;
+	bmp->res_v    = 2834;
+	bmp->rsvd2    = 0;
+
+	sd_mount();
+
+	f_mkdir("sd:/switch");
+	
+	char path[0x80] = "sd:/switch/picklock_rcm.bmp";
+
+	// Save screenshot and log.
+	int res = sd_save_to_file(bitmap, file_size, path);
+
+	// sd_unmount();
+
+	free(bitmap);
+	free(fb);
+
+	// Set timer to 2s.
+	timer = get_tmr_ms() + 2000;
+
+    return res;
+}

source/frontend/gui.h

@@ -0,0 +1,17 @@
+/*
+ * Copyright (c) 2018-2021 CTCaer
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+int save_fb_to_bmp();