When using multiscreen mode, the following function (which should print a scaled text) turned out to render only on the first screen:
function scale_text(str,x,y,c,scale)
memcpy(0x4300,0x0,0x0200)
memset(0x0,0,0x0200)
-- draw to spr mem at 0x0000
poke(0x5f55,0x00)
print(str,0,0,7)
-- draw to screen mem again
poke(0x5f55,0x60)
local w,h = #str*4,5
pal(7,c)
palt(0,true)
sspr(0,0,w,h,x,y,w*scale,h*scale)
pal()
memcpy(0x0,0x4300,0x0200)
end
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Just like normal printing, I expected this to work in multiscreen with the following calling code:
poke(0x5f36,1)
scrs_w, scrs_h = 3,1;
scr_ix = 0;
_camera = camera
function camera(x,y)
x = x or 0
y = y or 0
local dx=flr(scr_ix % scrs_w)
local dy=flr(scr_ix / scrs_w)
_camera(x+128*dx, y+128*dy)
end
function _draw()
scr_ix = stat(3)
camera(0,0)
cls(scr_ix+5)
sspr(0,0,24,24,200,30,48,48)
print("hello",120,80,8)
scale_text("hello",110,60,12,1.5)
return scr_ix < stat(11)-1
end |
But the result is a cut-off scaled text, while the normal text and the other sspr() call work just fine.
I think this is a bug in PICO-8, with remapping gfx memory not properly working in multiscreen mode.
P#130328 2023-05-30 18:59
1
Ok, this turned out not to be a bug but simply a thing of using multiscreen correctly. Drawing to sprite mem also needs to be offset by 128*(screen index).
So the working code for a multiscreen general text scaling routine would be:
function prints(str,x,y,c,scale)
memcpy(0x4300,0x0000,0x200)
memset(0x0,0,0x0200)
poke(0x5f55,0x00)
print(str,stat(3)*128,0,c)
poke(0x5f55,0x60)
local w,h = #str*4,5
sspr(0,0,w,h,x,y,w*scale,h*scale)
memcpy(0x0000,0x4300,0x200)
end
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P#130442 2023-06-02 07:19 ( Edited 2023-06-02 07:20)
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