fbsplash: Add support for 24 and 32 bit color depth
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
Denys Vlasenko
parent
55068c478e
commit
0e89fd9c39
@ -27,10 +27,6 @@
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/* If you want logging messages on /tmp/fbsplash.log... */
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#define DEBUG 0
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#define BYTES_PER_PIXEL 2
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typedef unsigned short DATA;
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struct globals {
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#if DEBUG
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bool bdebug_messages; // enable/disable logging
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@ -41,6 +37,7 @@ struct globals {
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const char *image_filename;
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struct fb_var_screeninfo scr_var;
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struct fb_fix_screeninfo scr_fix;
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unsigned bytes_per_pixel;
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};
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#define G (*ptr_to_globals)
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#define INIT_G() do { \
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@ -78,56 +75,92 @@ static void fb_open(const char *strfb_device)
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xioctl(fbfd, FBIOGET_VSCREENINFO, &G.scr_var);
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xioctl(fbfd, FBIOGET_FSCREENINFO, &G.scr_fix);
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if (G.scr_var.bits_per_pixel != 16)
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bb_error_msg_and_die("only 16 bpp is supported");
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if (G.scr_var.bits_per_pixel < 16 || G.scr_var.bits_per_pixel > 32)
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bb_error_msg_and_die("unsupported %u bpp", (int)G.scr_var.bits_per_pixel);
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G.bytes_per_pixel = (G.scr_var.bits_per_pixel + 7) >> 3;
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// map the device in memory
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G.addr = mmap(NULL,
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G.scr_var.xres * G.scr_var.yres_virtual
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* BYTES_PER_PIXEL /*(G.scr_var.bits_per_pixel / 8)*/,
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G.scr_var.xres * G.scr_var.yres * G.bytes_per_pixel,
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PROT_WRITE, MAP_SHARED, fbfd, 0);
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if (G.addr == MAP_FAILED)
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bb_perror_msg_and_die("mmap");
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// point to the start of the visible screen
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G.addr += G.scr_var.yoffset * G.scr_fix.line_length + G.scr_var.xoffset * BYTES_PER_PIXEL;
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G.addr += G.scr_var.yoffset * G.scr_fix.line_length + G.scr_var.xoffset * G.bytes_per_pixel;
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close(fbfd);
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}
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/**
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* Return pixel value of the passed RGB color
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*/
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static unsigned fb_pixel_value(unsigned r, unsigned g, unsigned b)
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{
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if (G.bytes_per_pixel == 2) {
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r >>= 3; // 5-bit red
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g >>= 2; // 6-bit green
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b >>= 3; // 5-bit blue
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return b + (g << 5) + (r << (5+6));
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}
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// RGB 888
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return b + (g << 8) + (r << 16);
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}
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/**
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* Draw pixel on framebuffer
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*/
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static void fb_write_pixel(unsigned char *addr, unsigned pixel)
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{
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switch (G.bytes_per_pixel) {
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case 2:
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*(uint16_t *)addr = pixel;
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break;
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case 4:
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*(uint32_t *)addr = pixel;
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break;
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default: // 24 bits per pixel
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addr[0] = pixel;
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addr[1] = pixel >> 8;
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addr[2] = pixel >> 16;
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}
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}
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/**
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* Draw hollow rectangle on framebuffer
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*/
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static void fb_drawrectangle(void)
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{
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int cnt;
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DATA thispix;
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DATA *ptr1, *ptr2;
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unsigned thispix;
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unsigned char *ptr1, *ptr2;
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unsigned char nred = G.nbar_colr/2;
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unsigned char ngreen = G.nbar_colg/2;
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unsigned char nblue = G.nbar_colb/2;
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nred >>= 3; // 5-bit red
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ngreen >>= 2; // 6-bit green
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nblue >>= 3; // 5-bit blue
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thispix = nblue + (ngreen << 5) + (nred << (5+6));
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thispix = fb_pixel_value(nred, ngreen, nblue);
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// horizontal lines
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ptr1 = (DATA*)(G.addr + (G.nbar_posy * G.scr_var.xres + G.nbar_posx) * BYTES_PER_PIXEL);
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ptr2 = (DATA*)(G.addr + ((G.nbar_posy + G.nbar_height - 1) * G.scr_var.xres + G.nbar_posx) * BYTES_PER_PIXEL);
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ptr1 = G.addr + (G.nbar_posy * G.scr_var.xres + G.nbar_posx) * G.bytes_per_pixel;
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ptr2 = G.addr + ((G.nbar_posy + G.nbar_height - 1) * G.scr_var.xres + G.nbar_posx) * G.bytes_per_pixel;
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cnt = G.nbar_width - 1;
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do {
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*ptr1++ = thispix;
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*ptr2++ = thispix;
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fb_write_pixel(ptr1, thispix);
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fb_write_pixel(ptr2, thispix);
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ptr1 += G.bytes_per_pixel;
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ptr2 += G.bytes_per_pixel;
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} while (--cnt >= 0);
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// vertical lines
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ptr1 = (DATA*)(G.addr + (G.nbar_posy * G.scr_var.xres + G.nbar_posx) * BYTES_PER_PIXEL);
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ptr2 = (DATA*)(G.addr + (G.nbar_posy * G.scr_var.xres + G.nbar_posx + G.nbar_width - 1) * BYTES_PER_PIXEL);
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ptr1 = G.addr + (G.nbar_posy * G.scr_var.xres + G.nbar_posx) * G.bytes_per_pixel;
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ptr2 = G.addr + (G.nbar_posy * G.scr_var.xres + G.nbar_posx + G.nbar_width - 1) * G.bytes_per_pixel;
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cnt = G.nbar_height - 1;
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do {
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*ptr1 = thispix; ptr1 += G.scr_var.xres;
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*ptr2 = thispix; ptr2 += G.scr_var.xres;
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fb_write_pixel(ptr1, thispix);
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fb_write_pixel(ptr2, thispix);
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ptr1 += G.scr_var.xres * G.bytes_per_pixel;
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ptr2 += G.scr_var.xres * G.bytes_per_pixel;
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} while (--cnt >= 0);
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}
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@ -142,21 +175,19 @@ static void fb_drawfullrectangle(int nx1pos, int ny1pos, int nx2pos, int ny2pos,
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unsigned char nred, unsigned char ngreen, unsigned char nblue)
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{
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int cnt1, cnt2, nypos;
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DATA thispix;
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DATA *ptr;
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unsigned thispix;
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unsigned char *ptr;
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nred >>= 3; // 5-bit red
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ngreen >>= 2; // 6-bit green
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nblue >>= 3; // 5-bit blue
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thispix = nblue + (ngreen << 5) + (nred << (5+6));
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thispix = fb_pixel_value(nred, ngreen, nblue);
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cnt1 = ny2pos - ny1pos;
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nypos = ny1pos;
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do {
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ptr = (DATA*)(G.addr + (nypos * G.scr_var.xres + nx1pos) * BYTES_PER_PIXEL);
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ptr = G.addr + (nypos * G.scr_var.xres + nx1pos) * G.bytes_per_pixel;
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cnt2 = nx2pos - nx1pos;
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do {
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*ptr++ = thispix;
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fb_write_pixel(ptr, thispix);
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ptr += G.bytes_per_pixel;
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} while (--cnt2 >= 0);
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nypos++;
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@ -276,18 +307,16 @@ static void fb_drawimage(void)
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height = G.scr_var.yres;
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for (j = 0; j < height; j++) {
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unsigned char *pixel;
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DATA *src;
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unsigned char *src;
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if (fread(pixline, 1, line_size, theme_file) != line_size)
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bb_error_msg_and_die("bad PPM file '%s'", G.image_filename);
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pixel = pixline;
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src = (DATA *)(G.addr + j * G.scr_fix.line_length);
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src = G.addr + j * G.scr_fix.line_length;
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for (i = 0; i < width; i++) {
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unsigned thispix;
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thispix = (((unsigned)pixel[0] << 8) & 0xf800)
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| (((unsigned)pixel[1] << 3) & 0x07e0)
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| (((unsigned)pixel[2] >> 3));
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*src++ = thispix;
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unsigned thispix = fb_pixel_value(pixel[0], pixel[1], pixel[2]);
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fb_write_pixel(src, thispix);
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src += G.bytes_per_pixel;
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pixel += 3;
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}
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}
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