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| author | Michele Calgaro <michele.calgaro@yahoo.it> | 2024-06-25 12:25:06 +0900 |
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| committer | Michele Calgaro <michele.calgaro@yahoo.it> | 2024-06-25 12:25:06 +0900 |
| commit | a09a6bc05e3f64c27e7c84dd768c7720fdf41136 (patch) | |
| tree | fe5a644a42056c012132e5bbc57f3ce1ba40d5c2 /doc/html/emb-framebuffer-howto.html | |
| parent | bba3e1fa3870a23f1cf0b5d1143ffd646ac797a4 (diff) | |
| download | tqt3-a09a6bc05e3f64c27e7c84dd768c7720fdf41136.tar.gz tqt3-a09a6bc05e3f64c27e7c84dd768c7720fdf41136.zip | |
Remove documentation for QWS classes and Qt/Embedded
Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
Diffstat (limited to 'doc/html/emb-framebuffer-howto.html')
| -rw-r--r-- | doc/html/emb-framebuffer-howto.html | 234 |
1 files changed, 0 insertions, 234 deletions
diff --git a/doc/html/emb-framebuffer-howto.html b/doc/html/emb-framebuffer-howto.html deleted file mode 100644 index 6fab9095e..000000000 --- a/doc/html/emb-framebuffer-howto.html +++ /dev/null @@ -1,234 +0,0 @@ -<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> -<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/doc/framebuffer-howto.doc:36 --> -<html> -<head> -<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> -<title>Enabling the Linux Framebuffer</title> -<style type="text/css"><!-- -fn { margin-left: 1cm; text-indent: -1cm; } -a:link { color: #004faf; text-decoration: none } -a:visited { color: #672967; text-decoration: none } -body { background: #ffffff; color: black; } ---></style> -</head> -<body> - -<table border="0" cellpadding="0" cellspacing="0" width="100%"> -<tr bgcolor="#E5E5E5"> -<td valign=center> - <a href="index.html"> -<font color="#004faf">Home</font></a> - | <a href="classes.html"> -<font color="#004faf">All Classes</font></a> - | <a href="mainclasses.html"> -<font color="#004faf">Main Classes</font></a> - | <a href="annotated.html"> -<font color="#004faf">Annotated</font></a> - | <a href="groups.html"> -<font color="#004faf">Grouped Classes</font></a> - | <a href="functions.html"> -<font color="#004faf">Functions</font></a> -</td> -<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>Enabling the Linux Framebuffer</h1> - - - -<p> This is only a short guide. -See <a href="file:/usr/src/linux/README">/usr/src/linux/README</a> and -<a href="file:/usr/src/linux/Documentation/fb/">/usr/src/linux/Documentation/fb/</a> for detailed information. -There is also a detailed explanation at -<a href="http://www.linuxdoc.org/HOWTO/Framebuffer-HOWTO.html">http://www.linuxdoc.org/HOWTO/Framebuffer-HOWTO.html</a>. -<p> <ol type=1> -<li> Make sure that you have the Linux kernel source code in -<a href="file:/usr/src/linux/">/usr/src/linux/</a>. -<p> <li> Log in as root and <tt>cd</tt> <tt>/usr/src/linux</tt> -<p> <li> Configure the kernel: -<p> Run: -<pre> - make menuconfig -</pre> - -<p> Select "Code maturity level options" and set "Prompt for -development and/or incomplete code/drivers". -<p> Then select "Console drivers" and set "Support for frame buffer -devices" to built-in (even if it says EXPERIMENTAL). Then configure -the driver. Most modern graphics cards can use the "VESA VGA -graphics console"; use that or a driver that specifically matches -your video card. Finally, enable "Advanced low level driver options" -and make sure that 16 and 32 bpp packed pixel support are enabled. -<p> When you are finished, chose exit and save. -<p> <li> Compile the kernel -<p> First do: -<pre> - make dep -</pre> - -then: -<pre> - make bzImage -</pre> - -<p> The new kernel should now be in arch/i386/boot/bzImage. -<p> <li> Copy the kernel to the boot directory: -<pre> - cp arch/i386/boot/bzImage /boot/linux.vesafb -</pre> - -<p> <li> Edit /etc/lilo.conf. -<p> <b>Warning:</b> Keep a backup of <a href="file:/etc/lilo.conf">/etc/lilo.conf</a>, and have a rescue disk -available. If you make a mistake, the machine may not boot. -<p> The file <a href="file:/etc/lilo.conf">/etc/lilo.conf</a> specifies how the system boots. The -precise contents of the file varies from system to system. Here is -an example: -<pre> -# LILO configuration file -boot = /dev/hda3 -delay = 30 -image = /boot/vmlinuz - root = /dev/hda3 - label = Linux - read-only # Non-UMSDOS filesystems should be mounted read-only for checking -other=/dev/hda1 - label=nt - table=/dev/hda -</pre> - -<p> Make a new "image" section that is a copy of the first one, but with -<pre> - image = /boot/linux.vesafb -</pre> - -and -<pre> - label = Linux-vesafb -</pre> - -Place it just above the first image section. -<p> Add a line before the image section saying <tt>vga = 791</tt>. (Meaning -1024x768, 16 bpp.) -<p> With the above example, lilo.conf would now be: -<pre> -# LILO configuration file -boot = /dev/hda3 -delay = 30 -vga = 791 -image = /boot/linux.vesafb - root = /dev/hda3 - label = Linux-vesafb - read-only # Non-UMSDOS filesystems should be mounted read-only for checking -image = /boot/vmlinuz - root = /dev/hda3 - label = Linux - read-only # Non-UMSDOS filesystems should be mounted read-only for checking -other=/dev/hda1 - label=nt - table=/dev/hda -</pre> - -<p> Do not change any existing lines in the file; just add new ones. -<p> <li> To make the new changes take effect, run the lilo program: -<pre> - lilo -</pre> - -<p> <li> Reboot the system. You should now see a penguin logo while the -system is booting. -(Or more than one on a multi-processor machine.) -<p> <li> If it does not boot properly with the new kernel, you can boot with -the old kernel by entering the label of the old image section at -the LILO prompt. (with the example lilo.conf file, the old label is -Linux.) -<p> If that does not work (probably because of an error in lilo.conf), -boot the machine using your rescue disk, restore <a href="file:/etc/lilo.conf">/etc/lilo.conf</a> from backup and re-run lilo. -<p> <li> Testing: Here's a short program that opens the frame buffer and draws a -gradient-filled red square. -<p> <pre> -#include <unistd.h> -#include <stdio.h> -#include <fcntl.h> -#include <linux/fb.h> -#include <sys/mman.h> - -int main() -{ - int fbfd = 0; - struct fb_var_screeninfo vinfo; - struct fb_fix_screeninfo finfo; - long int screensize = 0; - char *fbp = 0; - int x = 0, y = 0; - long int location = 0; - - // Open the file for reading and writing - fbfd = open("/dev/fb0", O_RDWR); - if (!fbfd) { - printf("Error: cannot open framebuffer device.\n"); - exit(1); - } - printf("The framebuffer device was opened successfully.\n"); - - // Get fixed screen information - if (ioctl(fbfd, FBIOGET_FSCREENINFO, &finfo)) { - printf("Error reading fixed information.\n"); - exit(2); - } - - // Get variable screen information - if (ioctl(fbfd, FBIOGET_VSCREENINFO, &vinfo)) { - printf("Error reading variable information.\n"); - exit(3); - } - - printf("%dx%d, %dbpp\n", vinfo.xres, vinfo.yres, vinfo.bits_per_pixel ); - - // Figure out the size of the screen in bytes - screensize = vinfo.xres * vinfo.yres * vinfo.bits_per_pixel / 8; - - // Map the device to memory - fbp = (char *)mmap(0, screensize, PROT_READ | PROT_WRITE, MAP_SHARED, - fbfd, 0); - if ((int)fbp == -1) { - printf("Error: failed to map framebuffer device to memory.\n"); - exit(4); - } - printf("The framebuffer device was mapped to memory successfully.\n"); - - x = 100; y = 100; // Where we are going to put the pixel - - // Figure out where in memory to put the pixel - for ( y = 100; y < 300; y++ ) - for ( x = 100; x < 300; x++ ) { - - location = (x+vinfo.xoffset) * (vinfo.bits_per_pixel/8) + - (y+vinfo.yoffset) * finfo.line_length; - - if ( vinfo.bits_per_pixel == 32 ) { - *(fbp + location) = 100; // Some blue - *(fbp + location + 1) = 15+(x-100)/2; // A little green - *(fbp + location + 2) = 200-(y-100)/5; // A lot of red - *(fbp + location + 3) = 0; // No transparency - } else { //assume 16bpp - int b = 10; - int g = (x-100)/6; // A little green - int r = 31-(y-100)/16; // A lot of red - unsigned short int t = r<<11 | g << 5 | b; - *((unsigned short int*)(fbp + location)) = t; - } - - } - munmap(fbp, screensize); - close(fbfd); - return 0; -} -</pre> - -</ol> -<p> -<!-- eof --> -<p><address><hr><div align=center> -<table width=100% cellspacing=0 border=0><tr> -<td>Copyright © 2007 -<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a> -<td align=right><div align=right>TQt 3.3.8</div> -</table></div></address></body> -</html> |