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cx16 sprites module: the palette_offset parameter now takes values 0-15 (instead of 0-255) to be more consistent with docs and vera behavior

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This commit is contained in:
Irmen de Jong 2024-04-07 21:49:03 +02:00
parent ddb8346711
commit 112d2d6058
5 changed files with 13 additions and 13 deletions
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1
codeCore/src/prog8/code/target/encodings/Cp437Encoding.kt
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@ -14,6 +14,7 @@ object Cp437Encoding {
val mapped = str.map { chr ->
when (chr) {
'\u0000' -> 0u
'\u00a0' -> 255u
'☺' -> 1u
'☻' -> 2u
'♥' -> 3u

7
compiler/res/prog8lib/cx16/sprites.p8
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@ -5,6 +5,7 @@
; note: sprites z-order will be in front of all layers.
; note: collision mask is not supported here yet.
; note: "palette offset" is counted as 0-15 (vera multiplies the offset by 16 to get at the actual color index)
sprites {
%option ignore_unused
@ -21,7 +22,7 @@ sprites {
sub init(ubyte spritenum,
ubyte databank, uword dataaddr,
ubyte width_flag, ubyte height_flag,
ubyte colors_flag, ubyte palette_offset_idx) {
ubyte colors_flag, ubyte palette_offset) {
hide(spritenum)
cx16.VERA_DC_VIDEO |= %01000000 ; enable sprites globally
dataaddr >>= 5
@ -30,7 +31,7 @@ sprites {
cx16.vpoke(1, sprite_reg, lsb(dataaddr)) ; address 12:5
cx16.vpoke(1, sprite_reg+1, colors_flag | msb(dataaddr)) ; 4 bpp + address 16:13
cx16.vpoke(1, sprite_reg+6, %00001100) ; z depth %11 = in front of both layers, no flips
cx16.vpoke(1, sprite_reg+7, height_flag<<6 | width_flag<<4 | palette_offset_idx>>4) ; 64x64 pixels, palette offset
cx16.vpoke(1, sprite_reg+7, height_flag<<6 | width_flag<<4 | palette_offset&15) ; 64x64 pixels, palette offset
}
sub data(ubyte spritenum, ubyte bank, uword addr) {
@ -143,7 +144,7 @@ sprites {
}
sub set_palette_offset(ubyte spritenum, ubyte offset) {
cx16.vpoke_mask(1, VERA_SPRITEREGS + 7 + spritenum*$0008, %11110000, offset>>4)
cx16.vpoke_mask(1, VERA_SPRITEREGS + 7 + spritenum*$0008, %11110000, offset&15)
}
sub set_mousepointer_hand() {

2
docs/source/todo.rst
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@ -1,8 +1,6 @@
TODO
====
change meaning of sprite module's palette offset parameter to 0-15
fix routines such as mult in verafx to return both 16-bit words of the result.
ubyte x,y compiles to more code than ubyte x + ubyte y

8
examples/cx16/sprites/dragon.p8
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@ -10,7 +10,7 @@ main {
; we choose arbitrary unused vram location for sprite data: $12000
const ubyte SPRITE_DATA_BANK = 1
const uword SPRITE_DATA_ADDR = $2000
const ubyte SPRITE_PALETTE_OFFSET_IDX = 16
const ubyte SPRITE_PALETTE_OFFSET = 1 ; sprite palette at color index 16
sub start() {
txt.plot(32,30)
@ -18,11 +18,11 @@ main {
; load the sprite data and color palette directly into Vera ram
void diskio.vload_raw("dragonsprite.bin", SPRITE_DATA_BANK, SPRITE_DATA_ADDR)
void diskio.vload_raw("dragonsprite.pal", 1, $fa00 + SPRITE_PALETTE_OFFSET_IDX*2)
void diskio.vload_raw("dragonsprite.pal", 1, $fa00 + SPRITE_PALETTE_OFFSET*16*2)
; initialize the dragon sprites
sprites.init(1, SPRITE_DATA_BANK, SPRITE_DATA_ADDR, sprites.SIZE_64, sprites.SIZE_64, sprites.COLORS_16, SPRITE_PALETTE_OFFSET_IDX)
sprites.init(2, SPRITE_DATA_BANK, SPRITE_DATA_ADDR + 64*64/2, sprites.SIZE_64, sprites.SIZE_64, sprites.COLORS_16,SPRITE_PALETTE_OFFSET_IDX)
sprites.init(1, SPRITE_DATA_BANK, SPRITE_DATA_ADDR, sprites.SIZE_64, sprites.SIZE_64, sprites.COLORS_16, SPRITE_PALETTE_OFFSET)
sprites.init(2, SPRITE_DATA_BANK, SPRITE_DATA_ADDR + 64*64/2, sprites.SIZE_64, sprites.SIZE_64, sprites.COLORS_16,SPRITE_PALETTE_OFFSET)
ubyte tt = 0
word xpos = -64

8
examples/cx16/sprites/dragons.p8
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@ -10,7 +10,7 @@ main {
; we choose arbitrary unused vram location for sprite data: $12000
const ubyte SPRITE_DATA_BANK = 1
const uword SPRITE_DATA_ADDR = $2000
const ubyte SPRITE_PALETTE_OFFSET_IDX = 16
const ubyte SPRITE_PALETTE_OFFSET = 1 ; sprite palette at color index 16
const ubyte NUM_DRAGONS = 25
word[NUM_DRAGONS*2] xpositions
@ -22,13 +22,13 @@ main {
; load the sprite data and color palette directly into Vera ram
void diskio.vload_raw("dragonsprite.bin", SPRITE_DATA_BANK, SPRITE_DATA_ADDR)
void diskio.vload_raw("dragonsprite.pal", 1, $fa00 + SPRITE_PALETTE_OFFSET_IDX*2)
void diskio.vload_raw("dragonsprite.pal", 1, $fa00 + SPRITE_PALETTE_OFFSET*16*2)
; initialize the dragon sprites (every dragon needs 2 sprites, top and bottom half)
ubyte sprite_num
for sprite_num in 0 to NUM_DRAGONS*2-2 step 2 {
sprites.init(sprite_num+1, SPRITE_DATA_BANK, SPRITE_DATA_ADDR, sprites.SIZE_64, sprites.SIZE_64, sprites.COLORS_16, SPRITE_PALETTE_OFFSET_IDX)
sprites.init(sprite_num+2, SPRITE_DATA_BANK, SPRITE_DATA_ADDR + 64*64/2, sprites.SIZE_64, sprites.SIZE_64, sprites.COLORS_16, SPRITE_PALETTE_OFFSET_IDX)
sprites.init(sprite_num+1, SPRITE_DATA_BANK, SPRITE_DATA_ADDR, sprites.SIZE_64, sprites.SIZE_64, sprites.COLORS_16, SPRITE_PALETTE_OFFSET)
sprites.init(sprite_num+2, SPRITE_DATA_BANK, SPRITE_DATA_ADDR + 64*64/2, sprites.SIZE_64, sprites.SIZE_64, sprites.COLORS_16, SPRITE_PALETTE_OFFSET)
xpositions[sprite_num] = math.rndw() % (640-64) as word
xpositions[sprite_num+1] = xpositions[sprite_num]