Commodore 64

Some C64 video mode related functions. More...

Functions
int	C64_FLI (T_IO_Context *context, byte *bitmap, byte *screen_ram, byte *color_ram, byte *background)
	Save a 3 layer picture to C64 FLI format. More...
int	C64_pixels_to_FLI (byte *bitmap, byte *screen_ram, byte *color_ram, byte *background, const byte *pixels, long pitch, int errmode)
	Convert a (1 layer) picture to C64 FLI format. More...
void	C64_set_palette (T_Components *palette)
	Set the 16 colors Commodore 64 palette. More...

Detailed Description

Some C64 video mode related functions.

Function Documentation

C64_FLI()

int C64_FLI	(	T_IO_Context *	context,
		byte *	bitmap,
		byte *	screen_ram,
		byte *	color_ram,
		byte *	background
	)

Save a 3 layer picture to C64 FLI format.

Parameters

context	the Save context
bitmap	a 8000 byte buffer to store bitmap data
screen_ram	a 8192 byte buffer to store the 8 screen RAMs
color_ram	a 1000 byte buffer to store the color RAM
background	a 200 byte buffer to store the background colors

Returns

0 for success, 1 if the picture is less than 3 layers, 2 if the picture dimensions are not 160x200

References count_set_bits(), Get_pixel(), T_IO_Context::Height, T_IO_Context::Nb_layers, NULL, Set_saving_layer(), and T_IO_Context::Width.

Referenced by Save_C64_fli().

C64_pixels_to_FLI()

int C64_pixels_to_FLI	(	byte *	bitmap,
		byte *	screen_ram,
		byte *	color_ram,
		byte *	background,
		const byte *	pixels,
		long	pitch,
		int	errmode
	)

Convert a (1 layer) picture to C64 FLI format.

Some "hints" can be put in background and color_ram. (a color value >= 16 means no hint).

Errors can be either outputed to the user with Warning messages, or put in layer 4. The layer 4 has to be created before.

Parameters

bitmap	a 8000 byte buffer to store bitmap data
screen_ram	a 8192 byte buffer to store the 8 screen RAMs
color_ram	a 1000 byte buffer to store the color RAM
background	a 200 byte buffer to store the background colors
pixels	source pixel buffer (at least 160x200)
pitch	bytes per line of the pixel buffer
errmode	error reporting mode 0 = report, 1 = mark in layer 4

Returns

0 the number of constraint errors

References T_Document::backups, count_set_bits(), count_trailing_zeros(), GFX2_DEBUG, GFX2_INFO, GFX2_Log(), Main, T_Page::Nb_layers, T_List_of_pages::Pages, Pixel_in_layer(), and Warning_with_format().

Referenced by Button_Constraint_mode(), and Save_C64_fli_monolayer().

C64_set_palette()

void C64_set_palette

(

T_Components *

palette

)

Set the 16 colors Commodore 64 palette.

Set C64 Palette from http://www.pepto.de/projects/colorvic/

Also set transparent color "16" as a dark grey that is distinguishable from black, but darker than normal colors.

set color "17" as RED to see color clashes

References T_Components::B, T_Components::G, and T_Components::R.

Referenced by Button_Constraint_menu(), Load_C64(), Load_GPX(), and Load_PRG().