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vdp rendering fixes

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This commit is contained in:
kub 2020-02-16 13:48:51 +01:00
parent 8dc138a099
commit 29d99d6bb8
3 changed files with 23 additions and 14 deletions
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15
pico/draw_arm.S
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@ -342,11 +342,15 @@ DrawLayer:
mov r4, r8, lsr #8 @ pvid->reg[13]
mov r4, r4, lsl #10 @ htab=pvid->reg[13]<<9; (halfwords)
tst r7, #2
addne r4, r4, r2, lsl #2 @ htab+=DrawScanline<<1; // Offset by line
tst r7, #1
biceq r4, r4, #0x1f @ htab&=~0xf; // Offset by tile
add r4, r4, r0, lsl #1 @ htab+=plane
ands r3, r7, #0x03
beq 0f
cmp r3, #2
mov r3, r2, lsl #2 @ htab+=DrawScanline<<1; // Offset by line
biceq r3, #0x1f @ htab&=~0xf; // Offset by tile
andlt r3, #0x1f
add r4, r4, r3
0: add r4, r4, r0, lsl #1 @ htab+=plane
bic r4, r4, #0x00ff0000 @ just in case
ldrh r3, [lr, r4] @ r3=hscroll
@ -599,6 +603,7 @@ DrawLayer:
tst r7, #0x8000
bne .DrawStrip_vs_hiprio
orr r7, r7, r10, lsl #24 @ code | (ty << 24)
cmp r7, r9
beq .DrawStrip_vs_samecode @ we know stuff about this tile already