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added software scaler

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@82 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-03-31 11:48:21 +00:00
parent 3158eb9e76
commit 3d48f1437f
1 changed files with 86 additions and 21 deletions
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105
Pico/Draw.s
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@ -1,3 +1,5 @@
@ vim:filetype=armasm
@ assembly "optimized" version of some funtions from draw.c
@ this is highly specialized, be careful if changing related C code!
@ -1285,35 +1287,21 @@ vidConvCpyRGB565: @ void *to, void *from, int pixels
FinalizeLineRGB555:
stmfd sp!, {r4-r8,lr}
ldr r5, =(Pico+0x22228) @ Pico.video
ldr r8, =(Pico+0x22228) @ Pico.video
ldr r4, =HighPal
ldrb r7, [r5, #-0x1a] @ 0x2220e ~ dirtyPal
ldrb r7, [r8, #-0x1a] @ 0x2220e ~ dirtyPal
mov r6, r0
mov r1, #0
tst r7, r7
beq .fl_noconvRGB555
strb r1, [r5, #-0x1a]
sub r1, r5, #0x128 @ r1=Pico.cram
strb r1, [r8, #-0x1a]
sub r1, r8, #0x128 @ r1=Pico.cram
mov r0, r4
mov r2, #0x40
bl vidConvCpyRGB565
.fl_noconvRGB555:
ldrb r12, [r5, #12]
ldr r0, =DrawLineDest
ldr r0, [r0]
tst r12, #1
movne r2, #320/8 @ len
bne .fl_no32colRGB555
ldr r3, =PicoOpt
mov r2, #256/8
ldr r3, [r3]
tst r3, #0x100
addeq r0, r0, #32*2
.fl_no32colRGB555:
mov r3, r4
tst r6, r6
beq .fl_noshRGB555
@ -1348,12 +1336,27 @@ FinalizeLineRGB555:
sub r3, r3, #0x40*2
.fl_noshRGB555:
ldr r0, =DrawLineDest
ldr r1, =(HighCol+8)
ldr r0, [r0]
ldrb r12, [r8, #12]
mov lr, #0xff
mov lr, lr, lsl #1
tst r12, #1
movne r2, #320/8 @ len
bne .fl_no32colRGB555
ldr r4, =PicoOpt
mov r2, #256/8
ldr r4, [r4]
tst r4, #0x4000
bne .fl_32scale_RGB555
tst r4, #0x0100
addeq r0, r0, #32*2
.fl_no32colRGB555:
.fl_loopRGB555:
ldr r12, [r1], #4
@ -1387,10 +1390,72 @@ FinalizeLineRGB555:
stmia r0!, {r4,r5,r8,r12}
bne .fl_loopRGB555
ldmfd sp!, {r4-r8,lr}
bx lr
.fl_32scale_RGB555:
stmfd sp!, {r9,r10}
mov r9, #0x3900 @ f800 07e0 001f | e000 0780 001c | 3800 01e0 0007
orr r9, r9, #0x00e7
.fl_loop32scale_RGB555:
ldr r12, [r1], #4
ldr r7, [r1], #4
and r4, lr, r12,lsl #1
ldrh r4, [r3, r4]
and r5, lr, r12,lsr #7
ldrh r5, [r3, r5]
and r4, r4, r9, lsl #2
orr r4, r4, r4, lsl #14 @ r4[31:16] = 1/4 pix_s 0
and r5, r5, r9, lsl #2
sub r6, r5, r5, lsr #2 @ r6 = 3/4 pix_s 1
add r4, r4, r6, lsl #16 @ pix_d 0, 1
and r6, lr, r12,lsr #15
ldrh r6, [r3, r6]
and r12,lr, r12,lsr #23
ldrh r12,[r3, r12]
and r6, r6, r9, lsl #2
add r5, r5, r6
mov r5, r5, lsr #1
sub r6, r6, r6, lsr #2 @ r6 = 3/4 pix_s 2
orr r5, r5, r6, lsl #16
and r6, lr, r7, lsl #1
ldrh r6, [r3, r6]
and r12,r12,r9, lsl #2
add r5, r5, r12,lsl #14 @ pix_d 2, 3
and r6, r6, r9, lsl #2
orr r6, r12,r6, lsl #16 @ pix_d 4, 5
and r12,lr, r7, lsr #7
ldrh r12,[r3, r12]
and r10,lr, r7, lsr #15
ldrh r10,[r3, r10]
and r12,r12,r9, lsl #2
sub r8, r12,r12,lsr #2 @ r8 = 3/4 pix_s 1
add r8, r8, r6, lsr #18
and r7, lr, r7, lsr #23
ldrh r7, [r3, r7]
and r10,r10,r9, lsl #2
orr r8, r8, r10,lsl #15
add r8, r8, r12,lsl #15 @ pix_d 6, 7
sub r10,r10,r10,lsr #2 @ r10= 3/4 pix_s 2
and r7, r7, r9, lsl #2
add r10,r10,r7, lsr #2 @ += 1/4 pix_s 3
orr r10,r10,r7, lsl #16 @ pix_d 8, 9
subs r2, r2, #1
stmia r0!, {r4,r5,r6,r8,r10}
bne .fl_loop32scale_RGB555
ldmfd sp!, {r9,r10}
ldmfd sp!, {r4-r8,lr}
bx lr
@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ utility