Display 2 color font

[orlanrod]

Is there a way to have two colors in text? The single color text is fine for dialog, but i would like to display 2 or more for larger text.

Thanks.

[Stef]

You just need to define your own font with several color. Default SGDK font only use colors 0 (background/transparent) and 15 (foreground) but you are free to redefine it so you have nice gradient in your letter for instance

[mikejmoffitt]

You can use your four palettes to print up to four different colors without having to touch the font in VRAM.

[dub]

Hi.

I try to insert my font image.


I tried the two functions :

Code: Select all

u16 VDP_loadFont(const TileSet *font, u8 use_dma)
(myfont = VDP_loadFont(fontrom, 1);)
void VDP_loadFontData(const u32 *font, u16 length, u8 use_dma)

I always have the same error : incompatible type for argument 1. I read the first argument of VDP_loadFont and insert in my .res file :
TILESET fontrom "font.png" 0

I try with BITMAP or IMAGE without success

[Stef]

You were close :

Code: Select all

VDP_loadFont(&fontrom, TRUE);

And indeed you have to use TILESET resource type here.

[dub]

Oh my god, i forgot the pointer.

I've adding a planB to see the transparent color with VDP_drawText(). Now, I use his own palette but we can use the palette we want.


I've made an example, maybe that can help someone else.
https://www.dropbox.com/s/awey2em7by2ygr8/font.zip

[KanedaFr]

Last month, I faced the same problem.
in my case, I wanted to use 8 colors fonts !
The 'only' valid way to do it was to load 8 version of the font.

Hopefully, colors needed to be changed every row so....HInt color change !

If anyone would like to know more, here the code snippet for SGDK:

Code: Select all

void handleHBlank()
{
	u8 currentRow = ((GET_VCOUNTER+1) >> 3);
	u16 fontColor;
	
	if (currentRow < 8)	return;
	fontColor = colors[ 1+(currentRow-8)% 8 ];

	asm("move.l #0xc0220000, 0xc00004.l");
	while((*((volatile u16*)GFX_CTRL_PORT) & 4) == 0);
	asm("move.w %0, 0xc00000.l":/*nothing */:"r"(fontColor) );
}

....

//faster than SYS_setHIntCallback(&handleHBlank);
internalHIntCB = &handleHBlank;

VDP_setHInterrupt(TRUE);
	

perhaps it could be optimized but it works like this so....