mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-09-19 22:59:00 +00:00
91 lines
4.1 KiB
C
91 lines
4.1 KiB
C
/*
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* Copyright (c) 2018 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include "di.h"
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#include "timers.h"
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#include "splash_screen.h"
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#include "fs_utils.h"
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#include "display/video_fb.h"
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#define u8 uint8_t
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#define u32 uint32_t
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#include "splash_screen_bmp.h"
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#undef u8
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#undef u32
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static void render_bmp(const uint32_t *bmp_data, uint32_t *framebuffer, uint32_t bmp_width, uint32_t bmp_height, uint32_t bmp_pos_x, uint32_t bmp_pos_y) {
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/* Render the BMP. */
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for (uint32_t y = bmp_pos_y; y < (bmp_pos_y + bmp_height); y++) {
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for (uint32_t x = bmp_pos_x; x < (bmp_pos_x + bmp_width); x++) {
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framebuffer[x + (y * SPLASH_SCREEN_STRIDE)] = bmp_data[(bmp_height + bmp_pos_y - 1 - y) * bmp_width + x - bmp_pos_x];
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}
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}
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/* Re-initialize the frame buffer. */
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display_init_framebuffer(framebuffer);
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}
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void display_splash_screen_bmp(const char *custom_splash_path, void *fb_address) {
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uint8_t *splash_screen = (uint8_t *)splash_screen_bmp;
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/* Try to load an external custom splash screen. */
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if ((custom_splash_path != NULL) && (custom_splash_path[0] != '\x00')) {
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if (!read_from_file(splash_screen, sizeof(&splash_screen_bmp), custom_splash_path)) {
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fatal_error("Failed to read custom splash screen from %s!\n", custom_splash_path);
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}
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}
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/* Check for 'BM' magic. */
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if ((splash_screen[0] == 'B') && (splash_screen[1] == 'M')) {
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/* Extract BMP parameters. */
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uint32_t bmp_size = (splash_screen[0x02] | (splash_screen[0x03] << 8) | (splash_screen[0x04] << 16) | (splash_screen[0x05] << 24));
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uint32_t bmp_offset = (splash_screen[0x0A] | (splash_screen[0x0B] << 8) | (splash_screen[0x0C] << 16) | (splash_screen[0x0D] << 24));
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uint32_t bmp_width = (splash_screen[0x12] | (splash_screen[0x13] << 8) | (splash_screen[0x14] << 16) | (splash_screen[0x15] << 24));
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uint32_t bmp_height = (splash_screen[0x16] | (splash_screen[0x17] << 8) | (splash_screen[0x18] << 16) | (splash_screen[0x19] << 24));
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uint16_t bmp_bpp = (splash_screen[0x1C] | (splash_screen[0x1D] << 8));
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uint32_t bmp_data_size = (splash_screen[0x22] | (splash_screen[0x23] << 8) | (splash_screen[0x24] << 16) | (splash_screen[0x25] << 24));
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/* Data size can be wrong or set to 0. In that case, we calculate it instead. */
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if (!bmp_data_size || (bmp_data_size >= bmp_size))
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bmp_data_size = (bmp_size - bmp_offset);
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/* Only accept images up to 720x1280 resolution and with 32 BPP. */
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if ((bmp_width > SPLASH_SCREEN_WIDTH_MAX) || (bmp_height > SPLASH_SCREEN_HEIGHT_MAX)) {
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fatal_error("Invalid splash screen dimensions!\n");
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} else if (bmp_bpp != SPLASH_SCREEN_BPP) {
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fatal_error("Invalid splash screen color depth!\n");
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} else if (bmp_data_size > SPLASH_SCREEN_SIZE_MAX) {
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fatal_error("Splash screen data size is too big!\n");
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}
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/* Calculate screen positions. */
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uint32_t bmp_pos_x = ((SPLASH_SCREEN_WIDTH_MAX - bmp_width) / 2);
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uint32_t bmp_pos_y = ((SPLASH_SCREEN_HEIGHT_MAX - bmp_height) / 2);
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/* Advance to data. */
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splash_screen += bmp_offset;
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/* Render the BMP. */
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render_bmp((uint32_t *)splash_screen, (uint32_t *)fb_address, bmp_width, bmp_height, bmp_pos_x, bmp_pos_y);
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} else {
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fatal_error("Invalid splash screen format!\n");
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}
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/* Display the splash screen for three seconds. */
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udelay(3000000);
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}
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