From 6d4c19707ef95942e323cbdc89fbbfdbe45e7cc5 Mon Sep 17 00:00:00 2001 From: Björn Stenberg Date: Mon, 8 Jan 2007 23:52:01 +0000 Subject: Splitting out www git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11952 a1c6a512-1295-4272-9138-f99709370657 --- www/docs/rocklatin.t | 95 ---------------------------------------------------- 1 file changed, 95 deletions(-) delete mode 100644 www/docs/rocklatin.t (limited to 'www/docs/rocklatin.t') diff --git a/www/docs/rocklatin.t b/www/docs/rocklatin.t deleted file mode 100644 index 819a845051..0000000000 --- a/www/docs/rocklatin.t +++ /dev/null @@ -1,95 +0,0 @@ -#define _PAGE_ Rocklatin1 -#include "head.t" - -

Only for developers... - -

Background

-The Archos player comes in two models. One with old LCD and one with new LCD. -(Differences can be seen below). You can't find any difference more than the -LCD, therefor we run the same code on both models. The original software -contains two different mappings from ASCII-character to hardware-LCD. Because -some characters doesn't exist in both hardwares all national characters -are left out in both hardware. -

The old LCD can have 4 software defined characters, and the new LCD can -have 8 software defined characters. - - - -
HW layout of old LCD:
HW layout of new LCD:
- -

What is Rocklatin1

-Rocklatin1 is based on Winlatin1 (which is identical to Latin1 but some -extra characters). All characters presented in any HW-LCD (i.e. old LCD) -is mapped in Rocklatin1 and some extra characters we find good to use. - - - - -
Rocklatin1 of old LCD:
Rocklatin1 of new LCD:
-The red characters are characters not defined in the HW-LCD. These characters -are mapped by the software to a software defined character (0-4/8) whenever -they are used. - -

But what if...

-...all software defined characters are taken?
-Well, then a substitute character will be used for that character. - - - - -
Substitute of old LCD:
Substitute of new LCD:
-The red characters shows where a substitution is made. - -

-All Rocklatin1 characters between 0x00 and 0x1f are hardcoded to be prioritized. -That means that if a national character is displayed at LCD and an icon -(0x18-0x1f) is to be shown, the character with highest Rocklatin1 value will -be switched to a substitute character. - -

Accessing hardware

-The Rockbox software can access a HW-LCD-character by doing a lcd_putc(0x100-0x1ff). That would of course make it 100% hardware depended (=not good). -

-The Rockbox software can also define 22 own patterns, even though hardware only -allows 4 or 8. The software should of course not try to display more than 4 -or 8 of such characters. This code example shows how to define a pattern: -

-{
-  unsigned char pattern[]={ 0x0a, 0x00, 0x00, 0x0c,
-                            0x04, 0x04, 0x0e};
-  unsigned char handle;
-
-  handle=lcd_get_locked_pattern();
-  lcd_define_pattern(handle, pattern);
-
-  lcd_putc(x, y, handle);
-
-  ...
-
-  lcd_unlock_pattern(handle);
-}
-
-The handle is very likely to be between 0x01 to 0x15, which in software will -be handled as a prioritized character (even higher than the icons). - -

Some notes

- - -#include "foot.t" -- cgit v1.2.3