/* If you want logging messages on /tmp/fbsplash.log... */
#define DEBUG 0
-#define BYTES_PER_PIXEL 2
-
-typedef unsigned short DATA;
-
struct globals {
#if DEBUG
bool bdebug_messages; // enable/disable logging
const char *image_filename;
struct fb_var_screeninfo scr_var;
struct fb_fix_screeninfo scr_fix;
+ unsigned bytes_per_pixel;
};
#define G (*ptr_to_globals)
#define INIT_G() do { \
/**
- * Open and initialize the framebuffer device
+ * Open and initialize the framebuffer device
* \param *strfb_device pointer to framebuffer device
*/
static void fb_open(const char *strfb_device)
xioctl(fbfd, FBIOGET_VSCREENINFO, &G.scr_var);
xioctl(fbfd, FBIOGET_FSCREENINFO, &G.scr_fix);
- if (G.scr_var.bits_per_pixel != 16)
- bb_error_msg_and_die("only 16 bpp is supported");
+ if (G.scr_var.bits_per_pixel < 16 || G.scr_var.bits_per_pixel > 32)
+ bb_error_msg_and_die("unsupported %u bpp", (int)G.scr_var.bits_per_pixel);
+ G.bytes_per_pixel = (G.scr_var.bits_per_pixel + 7) >> 3;
// map the device in memory
G.addr = mmap(NULL,
- G.scr_var.xres * G.scr_var.yres_virtual
- * BYTES_PER_PIXEL /*(G.scr_var.bits_per_pixel / 8)*/,
+ G.scr_var.xres * G.scr_var.yres * G.bytes_per_pixel,
PROT_WRITE, MAP_SHARED, fbfd, 0);
if (G.addr == MAP_FAILED)
bb_perror_msg_and_die("mmap");
// point to the start of the visible screen
- G.addr += G.scr_var.yoffset * G.scr_fix.line_length + G.scr_var.xoffset * BYTES_PER_PIXEL;
+ G.addr += G.scr_var.yoffset * G.scr_fix.line_length + G.scr_var.xoffset * G.bytes_per_pixel;
close(fbfd);
}
/**
- * Draw hollow rectangle on framebuffer
+ * Return pixel value of the passed RGB color
+ */
+static unsigned fb_pixel_value(unsigned r, unsigned g, unsigned b)
+{
+ if (G.bytes_per_pixel == 2) {
+ r >>= 3; // 5-bit red
+ g >>= 2; // 6-bit green
+ b >>= 3; // 5-bit blue
+ return b + (g << 5) + (r << (5+6));
+ }
+ // RGB 888
+ return b + (g << 8) + (r << 16);
+}
+
+/**
+ * Draw pixel on framebuffer
+ */
+static void fb_write_pixel(unsigned char *addr, unsigned pixel)
+{
+ switch (G.bytes_per_pixel) {
+ case 2:
+ *(uint16_t *)addr = pixel;
+ break;
+ case 4:
+ *(uint32_t *)addr = pixel;
+ break;
+ default: // 24 bits per pixel
+ addr[0] = pixel;
+ addr[1] = pixel >> 8;
+ addr[2] = pixel >> 16;
+ }
+}
+
+
+/**
+ * Draw hollow rectangle on framebuffer
*/
static void fb_drawrectangle(void)
{
int cnt;
- DATA thispix;
- DATA *ptr1, *ptr2;
+ unsigned thispix;
+ unsigned char *ptr1, *ptr2;
unsigned char nred = G.nbar_colr/2;
unsigned char ngreen = G.nbar_colg/2;
unsigned char nblue = G.nbar_colb/2;
- nred >>= 3; // 5-bit red
- ngreen >>= 2; // 6-bit green
- nblue >>= 3; // 5-bit blue
- thispix = nblue + (ngreen << 5) + (nred << (5+6));
+ thispix = fb_pixel_value(nred, ngreen, nblue);
// horizontal lines
- ptr1 = (DATA*)(G.addr + (G.nbar_posy * G.scr_var.xres + G.nbar_posx) * BYTES_PER_PIXEL);
- ptr2 = (DATA*)(G.addr + ((G.nbar_posy + G.nbar_height - 1) * G.scr_var.xres + G.nbar_posx) * BYTES_PER_PIXEL);
+ ptr1 = G.addr + (G.nbar_posy * G.scr_var.xres + G.nbar_posx) * G.bytes_per_pixel;
+ ptr2 = G.addr + ((G.nbar_posy + G.nbar_height - 1) * G.scr_var.xres + G.nbar_posx) * G.bytes_per_pixel;
cnt = G.nbar_width - 1;
do {
- *ptr1++ = thispix;
- *ptr2++ = thispix;
+ fb_write_pixel(ptr1, thispix);
+ fb_write_pixel(ptr2, thispix);
+ ptr1 += G.bytes_per_pixel;
+ ptr2 += G.bytes_per_pixel;
} while (--cnt >= 0);
// vertical lines
- ptr1 = (DATA*)(G.addr + (G.nbar_posy * G.scr_var.xres + G.nbar_posx) * BYTES_PER_PIXEL);
- ptr2 = (DATA*)(G.addr + (G.nbar_posy * G.scr_var.xres + G.nbar_posx + G.nbar_width - 1) * BYTES_PER_PIXEL);
+ ptr1 = G.addr + (G.nbar_posy * G.scr_var.xres + G.nbar_posx) * G.bytes_per_pixel;
+ ptr2 = G.addr + (G.nbar_posy * G.scr_var.xres + G.nbar_posx + G.nbar_width - 1) * G.bytes_per_pixel;
cnt = G.nbar_height - 1;
do {
- *ptr1 = thispix; ptr1 += G.scr_var.xres;
- *ptr2 = thispix; ptr2 += G.scr_var.xres;
+ fb_write_pixel(ptr1, thispix);
+ fb_write_pixel(ptr2, thispix);
+ ptr1 += G.scr_var.xres * G.bytes_per_pixel;
+ ptr2 += G.scr_var.xres * G.bytes_per_pixel;
} while (--cnt >= 0);
}
/**
- * Draw filled rectangle on framebuffer
+ * Draw filled rectangle on framebuffer
* \param nx1pos,ny1pos upper left position
* \param nx2pos,ny2pos down right position
* \param nred,ngreen,nblue rgb color
unsigned char nred, unsigned char ngreen, unsigned char nblue)
{
int cnt1, cnt2, nypos;
- DATA thispix;
- DATA *ptr;
+ unsigned thispix;
+ unsigned char *ptr;
- nred >>= 3; // 5-bit red
- ngreen >>= 2; // 6-bit green
- nblue >>= 3; // 5-bit blue
- thispix = nblue + (ngreen << 5) + (nred << (5+6));
+ thispix = fb_pixel_value(nred, ngreen, nblue);
cnt1 = ny2pos - ny1pos;
nypos = ny1pos;
do {
- ptr = (DATA*)(G.addr + (nypos * G.scr_var.xres + nx1pos) * BYTES_PER_PIXEL);
+ ptr = G.addr + (nypos * G.scr_var.xres + nx1pos) * G.bytes_per_pixel;
cnt2 = nx2pos - nx1pos;
do {
- *ptr++ = thispix;
+ fb_write_pixel(ptr, thispix);
+ ptr += G.bytes_per_pixel;
} while (--cnt2 >= 0);
nypos++;
/**
- * Draw a progress bar on framebuffer
+ * Draw a progress bar on framebuffer
* \param percent percentage of loading
*/
static void fb_drawprogressbar(unsigned percent)
/**
- * Draw image from PPM file
+ * Draw image from PPM file
*/
static void fb_drawimage(void)
{
height = G.scr_var.yres;
for (j = 0; j < height; j++) {
unsigned char *pixel;
- DATA *src;
+ unsigned char *src;
if (fread(pixline, 1, line_size, theme_file) != line_size)
bb_error_msg_and_die("bad PPM file '%s'", G.image_filename);
pixel = pixline;
- src = (DATA *)(G.addr + j * G.scr_fix.line_length);
+ src = G.addr + j * G.scr_fix.line_length;
for (i = 0; i < width; i++) {
- unsigned thispix;
- thispix = (((unsigned)pixel[0] << 8) & 0xf800)
- | (((unsigned)pixel[1] << 3) & 0x07e0)
- | (((unsigned)pixel[2] >> 3));
- *src++ = thispix;
+ unsigned thispix = fb_pixel_value(pixel[0], pixel[1], pixel[2]);
+ fb_write_pixel(src, thispix);
+ src += G.bytes_per_pixel;
pixel += 3;
}
}
/**
- * Parse configuration file
+ * Parse configuration file
* \param *cfg_filename name of the configuration file
*/
static void init(const char *cfg_filename)
projects / oweals / busybox.git / commitdiff