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12 commits

Author SHA1 Message Date
Jens Arnold
1a40e10933 H1x0: Changed lcd_blit() and the grayscale library to use the same internal format as on archos (1bpp). While the slowdown of the ISR is minimal (the intermediate buffers are in IRAM), the planar grayscale buffer takes only half the space for a given depth, and gray_update[_rect]() and unbuffered drawing/scrolling are faster because less data needs to be moved. It should also make porting of video.rock somewhat easier. * Archos recorders, Ondios: Some slight optimisations of the grayscale library. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7571 a1c6a512-1295-4272-9138-f99709370657
 2005-09-30 20:10:27 +00:00
Jens Arnold
00866dbf86 Grayscale library: (1) Ported to iriver H1x0. Experiments have shown that the intended 49-shade mode isn't possible due to interference between the internal greylevel generation of the LCD and external pixel flipping, so the lib allows 33 shades as on the Archos. The current implementation wastes RAM by not switching the LCD to b&w mode and simply using colours 0 and 3 only. However, this allows to show a partial greyscale overlay and normal 4-shade graphics in parallel. (2) Converted all asm blocks to use symbolic parameters. (3) Properly marked asm input parameters that are changed within the block as in-out and feed them from a temp variable where necessary. (4) Screenshot is not yet working on H1x0. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7244 a1c6a512-1295-4272-9138-f99709370657
 2005-07-27 19:58:49 +00:00
Jens Arnold
c20a00ef3e Complete rework of the grayscale library: (1) Implemented the new rockbox graphics api. (2) Added buffered mode, and implemented most drawing functions for buffered mode only. Buffered mode will ease implementation of animated graphics. Some functions are additionally provided as unbuffered versions (drawing grayscale bitmaps, scrolling) since unbuffered mode is better suited for non-animated graphics (JPEG viewer, mandelbrot) and saves some RAM, which is important on Archos. (3) Put all functions in a couple of source files, no more one-function-per-files. This became possible since sectioned compilation for the plugin library and appropriate linking for the pluginswas introduced, otherwise the binaries would be bloated by unused functions. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7241 a1c6a512-1295-4272-9138-f99709370657
 2005-07-25 20:50:34 +00:00
Jens Arnold
85890b88df Const policed the grayscale lib & plugin 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4985 a1c6a512-1295-4272-9138-f99709370657
 2004-08-03 20:57:06 +00:00
Jens Arnold
d073326b6b Added screen dump function to the grayscale lib 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4843 a1c6a512-1295-4272-9138-f99709370657
 2004-07-06 23:11:02 +00:00
Jens Arnold
0690ac1966 added comments about default values 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4804 a1c6a512-1295-4272-9138-f99709370657
 2004-06-25 21:09:34 +00:00
Jens Arnold
7c6bdd6493 Split grayscale library into several files to make up a real function library. Significantly decreases binary size for plugins using it. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4802 a1c6a512-1295-4272-9138-f99709370657
 2004-06-23 22:15:50 +00:00
Jens Arnold
ca2bb463d3 Major rework of the grayscale framework: 
* api change - all drawing functions now use draw mode, foreground and
  background shades set globally by separate functions
* There are now 4 draw modes for all drawing functions, no more separate
  functions for inverse drawing
* Significant speedup of 1-bit bitmap (and font) drawing (2..3 times)
* Some more speed tweaks
* Additional functions for horizontal and vertical lines
* Copied describing comments to the header file for easier reference
* The safety net against an uninitialized grayscale buffer is gone


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4711 a1c6a512-1295-4272-9138-f99709370657
 2004-06-02 23:53:27 +00:00
Jens Arnold
b3acd275ce Missing function declaration 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4655 a1c6a512-1295-4272-9138-f99709370657
 2004-05-20 08:25:16 +00:00
Jens Arnold
512079f944 Font support, several speed and size tweaks 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4654 a1c6a512-1295-4272-9138-f99709370657
 2004-05-20 08:21:18 +00:00
Jens Arnold
007e1d1af3 Added return parameter for space taken by grayscale buffer to gray_init_buffer() 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4648 a1c6a512-1295-4272-9138-f99709370657
 2004-05-19 17:02:20 +00:00
Jens Arnold
a05c413774 First real library version of the grayscale framework 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4641 a1c6a512-1295-4272-9138-f99709370657
 2004-05-19 08:18:25 +00:00