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fbsplash: Add support for 24 and 32 bit color depth

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function                                             old     new   delta
fb_drawprogressbar                                   372     447     +75
fb_pixel_value                                         -      50     +50
fb_write_pixel                                         -      47     +47
fbsplash_main                                        889     920     +31
fb_drawfullrectangle                                 101     131     +30
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 3/0 up/down: 233/0)             Total: 233 bytes

Signed-off-by: Nuno Lucas <ntlucas@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Nuno Lucas 2011-03-28 15:30:59 +02:00 committed by Denys Vlasenko
parent 55068c478e
commit 0e89fd9c39
1 changed files with 73 additions and 44 deletions
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117
miscutils/fbsplash.c
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@ -27,10 +27,6 @@
/* 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
@ -41,6 +37,7 @@ struct globals {
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 { \
@ -67,7 +64,7 @@ struct globals {
/**
* 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)
@ -78,62 +75,98 @@ 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
@ -142,21 +175,19 @@ static void fb_drawfullrectangle(int nx1pos, int ny1pos, int nx2pos, int ny2pos,
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++;
@ -165,7 +196,7 @@ static void fb_drawfullrectangle(int nx1pos, int ny1pos, int nx2pos, int ny2pos,
/**
* Draw a progress bar on framebuffer
* Draw a progress bar on framebuffer
* \param percent percentage of loading
*/
static void fb_drawprogressbar(unsigned percent)
@ -215,7 +246,7 @@ static void fb_drawprogressbar(unsigned percent)
/**
* Draw image from PPM file
* Draw image from PPM file
*/
static void fb_drawimage(void)
{
@ -276,18 +307,16 @@ 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;
}
}
@ -297,7 +326,7 @@ static void fb_drawimage(void)
/**
* Parse configuration file
* Parse configuration file
* \param *cfg_filename name of the configuration file
*/
static void init(const char *cfg_filename)