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Decompile texSwapAltRowBytes

This commit is contained in:
Ryan Dwyer 2022-02-18 17:13:36 +10:00
parent 56347c6e09
commit a67ae60198
2 changed files with 79 additions and 139 deletions
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216
src/game/texdecompress.c
View File

@ -195,7 +195,7 @@ s32 texInflateZlib(u8 *src, u8 *dst, s32 arg2, s32 forcenumimages, struct textur
foundthething = true;
}
} else {
func0f1729f8(&dst[totalbytesout], width, height, format);
texSwapAltRowBytes(&dst[totalbytesout], width, height, format);
totalbytesout += imagebytesout;
}
} else {
@ -234,7 +234,7 @@ s32 texInflateZlib(u8 *src, u8 *dst, s32 arg2, s32 forcenumimages, struct textur
break;
}
func0f1729f8(start, tmpwidth, tmpheight, format);
texSwapAltRowBytes(start, tmpwidth, tmpheight, format);
totalbytesout += imagebytesout;
@ -245,9 +245,9 @@ s32 texInflateZlib(u8 *src, u8 *dst, s32 arg2, s32 forcenumimages, struct textur
end += imagebytesout;
}
func0f1729f8(start, tmpwidth, tmpheight, format);
texSwapAltRowBytes(start, tmpwidth, tmpheight, format);
} else {
func0f1729f8(dst, width, height, format);
texSwapAltRowBytes(dst, width, height, format);
}
}
@ -1528,7 +1528,7 @@ s32 texInflateNonZlib(u8 *src, u8 *dst, s32 arg2, s32 forcenumimages, struct tex
}
if (arg2 == 1) {
func0f1729f8(&dst[totalbytesout], width, height, format);
texSwapAltRowBytes(&dst[totalbytesout], width, height, format);
}
imagebytesout = (imagebytesout + 7) & ~7;
@ -1569,17 +1569,21 @@ s32 texInflateNonZlib(u8 *src, u8 *dst, s32 arg2, s32 forcenumimages, struct tex
for (i = 1; i < forcenumimages; i++) {
imagebytesout = func0f1706ec(start, end, tmpwidth, tmpheight, format);
func0f1729f8(start, tmpwidth, tmpheight, format);
texSwapAltRowBytes(start, tmpwidth, tmpheight, format);
totalbytesout += imagebytesout;
tmpwidth = (tmpwidth + 1) >> 1;
tmpheight = (tmpheight + 1) >> 1;
start = end;
end += imagebytesout;
}
func0f1729f8(start, tmpwidth, tmpheight, format);
texSwapAltRowBytes(start, tmpwidth, tmpheight, format);
} else {
func0f1729f8(dst, width, height, format);
texSwapAltRowBytes(dst, width, height, format);
}
}
@ -4147,136 +4151,72 @@ glabel var7f1b7b4c
/* f1729f4: 27bd0020 */ addiu $sp,$sp,0x20
);
GLOBAL_ASM(
glabel func0f1729f8
.late_rodata
glabel var7f1b7b50
.word func0f1729f8+0x2c # f172a24
glabel var7f1b7b54
.word func0f1729f8+0x40 # f172a38
glabel var7f1b7b58
.word func0f1729f8+0x2c # f172a24
glabel var7f1b7b5c
.word func0f1729f8+0x40 # f172a38
glabel var7f1b7b60
.word func0f1729f8+0x40 # f172a38
glabel var7f1b7b64
.word func0f1729f8+0x58 # f172a50
glabel var7f1b7b68
.word func0f1729f8+0x70 # f172a68
glabel var7f1b7b6c
.word func0f1729f8+0x58 # f172a50
glabel var7f1b7b70
.word func0f1729f8+0x70 # f172a68
glabel var7f1b7b74
.word func0f1729f8+0x58 # f172a50
glabel var7f1b7b78
.word func0f1729f8+0x70 # f172a68
glabel var7f1b7b7c
.word func0f1729f8+0x58 # f172a50
glabel var7f1b7b80
.word func0f1729f8+0x70 # f172a68
.text
/* f1729f8: 27bdfff0 */ addiu $sp,$sp,-16
/* f1729fc: 2ce1000d */ sltiu $at,$a3,0xd
/* f172a00: afa50014 */ sw $a1,0x14($sp)
/* f172a04: 1020001d */ beqz $at,.L0f172a7c
/* f172a08: 00e01825 */ or $v1,$a3,$zero
/* f172a0c: 00077080 */ sll $t6,$a3,0x2
/* f172a10: 3c017f1b */ lui $at,%hi(var7f1b7b50)
/* f172a14: 002e0821 */ addu $at,$at,$t6
/* f172a18: 8c2e7b50 */ lw $t6,%lo(var7f1b7b50)($at)
/* f172a1c: 01c00008 */ jr $t6
/* f172a20: 00000000 */ nop
/* f172a24: 8fa50014 */ lw $a1,0x14($sp)
/* f172a28: 24a50003 */ addiu $a1,$a1,0x3
/* f172a2c: 30af0ffc */ andi $t7,$a1,0xffc
/* f172a30: 10000012 */ b .L0f172a7c
/* f172a34: afaf0004 */ sw $t7,0x4($sp)
/* f172a38: 8fa50014 */ lw $a1,0x14($sp)
/* f172a3c: 24a50003 */ addiu $a1,$a1,0x3
/* f172a40: 30b80ffc */ andi $t8,$a1,0xffc
/* f172a44: 0018c843 */ sra $t9,$t8,0x1
/* f172a48: 1000000c */ b .L0f172a7c
/* f172a4c: afb90004 */ sw $t9,0x4($sp)
/* f172a50: 8fa50014 */ lw $a1,0x14($sp)
/* f172a54: 24a50007 */ addiu $a1,$a1,0x7
/* f172a58: 30aa0ff8 */ andi $t2,$a1,0xff8
/* f172a5c: 000a5883 */ sra $t3,$t2,0x2
/* f172a60: 10000006 */ b .L0f172a7c
/* f172a64: afab0004 */ sw $t3,0x4($sp)
/* f172a68: 8fa50014 */ lw $a1,0x14($sp)
/* f172a6c: 24a5000f */ addiu $a1,$a1,0xf
/* f172a70: 30ac0ff0 */ andi $t4,$a1,0xff0
/* f172a74: 000c68c3 */ sra $t5,$t4,0x3
/* f172a78: afad0004 */ sw $t5,0x4($sp)
.L0f172a7c:
/* f172a7c: 8fa50004 */ lw $a1,0x4($sp)
/* f172a80: 24010002 */ addiu $at,$zero,0x2
/* f172a84: 00057080 */ sll $t6,$a1,0x2
/* f172a88: 10600002 */ beqz $v1,.L0f172a94
/* f172a8c: 008e1021 */ addu $v0,$a0,$t6
/* f172a90: 1461001b */ bne $v1,$at,.L0f172b00
.L0f172a94:
/* f172a94: 28c10002 */ slti $at,$a2,0x2
/* f172a98: 1420002e */ bnez $at,.L0f172b54
/* f172a9c: 24030001 */ addiu $v1,$zero,0x1
/* f172aa0: 00a04825 */ or $t1,$a1,$zero
/* f172aa4: 000978c0 */ sll $t7,$t1,0x3
/* f172aa8: 01e04825 */ or $t1,$t7,$zero
.L0f172aac:
/* f172aac: 18a0000e */ blez $a1,.L0f172ae8
/* f172ab0: 00002025 */ or $a0,$zero,$zero
/* f172ab4: 00404025 */ or $t0,$v0,$zero
.L0f172ab8:
/* f172ab8: 8d070000 */ lw $a3,0x0($t0)
/* f172abc: 8d180008 */ lw $t8,0x8($t0)
/* f172ac0: 8d19000c */ lw $t9,0xc($t0)
/* f172ac4: ad070008 */ sw $a3,0x8($t0)
/* f172ac8: 8d070004 */ lw $a3,0x4($t0)
/* f172acc: 24840004 */ addiu $a0,$a0,0x4
/* f172ad0: 0085082a */ slt $at,$a0,$a1
/* f172ad4: 25080010 */ addiu $t0,$t0,0x10
/* f172ad8: ad18fff0 */ sw $t8,-0x10($t0)
/* f172adc: ad19fff4 */ sw $t9,-0xc($t0)
/* f172ae0: 1420fff5 */ bnez $at,.L0f172ab8
/* f172ae4: ad07fffc */ sw $a3,-0x4($t0)
.L0f172ae8:
/* f172ae8: 24630002 */ addiu $v1,$v1,0x2
/* f172aec: 0066082a */ slt $at,$v1,$a2
/* f172af0: 1420ffee */ bnez $at,.L0f172aac
/* f172af4: 00491021 */ addu $v0,$v0,$t1
/* f172af8: 10000016 */ b .L0f172b54
/* f172afc: 00000000 */ nop
.L0f172b00:
/* f172b00: 28c10002 */ slti $at,$a2,0x2
/* f172b04: 14200013 */ bnez $at,.L0f172b54
/* f172b08: 24030001 */ addiu $v1,$zero,0x1
/* f172b0c: 00a04825 */ or $t1,$a1,$zero
/* f172b10: 000950c0 */ sll $t2,$t1,0x3
/* f172b14: 01404825 */ or $t1,$t2,$zero
.L0f172b18:
/* f172b18: 18a0000a */ blez $a1,.L0f172b44
/* f172b1c: 00002025 */ or $a0,$zero,$zero
/* f172b20: 00404025 */ or $t0,$v0,$zero
.L0f172b24:
/* f172b24: 8d070000 */ lw $a3,0x0($t0)
/* f172b28: 8d0b0004 */ lw $t3,0x4($t0)
/* f172b2c: 24840002 */ addiu $a0,$a0,0x2
/* f172b30: 0085082a */ slt $at,$a0,$a1
/* f172b34: 25080008 */ addiu $t0,$t0,0x8
/* f172b38: ad07fffc */ sw $a3,-0x4($t0)
/* f172b3c: 1420fff9 */ bnez $at,.L0f172b24
/* f172b40: ad0bfff8 */ sw $t3,-0x8($t0)
.L0f172b44:
/* f172b44: 24630002 */ addiu $v1,$v1,0x2
/* f172b48: 0066082a */ slt $at,$v1,$a2
/* f172b4c: 1420fff2 */ bnez $at,.L0f172b18
/* f172b50: 00491021 */ addu $v0,$v0,$t1
.L0f172b54:
/* f172b54: 03e00008 */ jr $ra
/* f172b58: 27bd0010 */ addiu $sp,$sp,0x10
);
/**
* For every second row, swap the bytes within that row.
*
* For textures with 32-bit colour values (in GBI format), swap every pair
* within each word. For all other textures, swap every byte within each pair.
*/
void texSwapAltRowBytes(u8 *dst, s32 width, s32 height, s32 format)
{
s32 x;
s32 y;
s32 alignedwidth;
u32 *row = (u32 *)dst;
s32 tmp;
switch (format) {
case TEXFORMAT_RGBA32:
case TEXFORMAT_RGB24:
alignedwidth = (width + 3) & 0xffc;
break;
case TEXFORMAT_RGBA16:
case TEXFORMAT_RGB15:
case TEXFORMAT_IA16:
alignedwidth = ((width + 3) & 0xffc) >> 1;
break;
case TEXFORMAT_IA8:
case TEXFORMAT_I8:
case TEXFORMAT_RGBA16_CI8:
case TEXFORMAT_IA16_CI8:
alignedwidth = ((width + 7) & 0xff8) >> 2;
break;
case TEXFORMAT_IA4:
case TEXFORMAT_I4:
case TEXFORMAT_RGBA16_CI4:
case TEXFORMAT_0C:
alignedwidth = ((width + 0xf) & 0xff0) >> 3;
break;
}
row += alignedwidth;
if (format == TEXFORMAT_RGBA32 || format == TEXFORMAT_RGB24) {
for (y = 1; y < height; y += 2) {
for (x = 0; x < alignedwidth; x += 4) {
tmp = row[x + 0];
row[x + 0] = row[x + 2];
row[x + 2] = tmp;
tmp = row[x + 1];
row[x + 1] = row[x + 3];
row[x + 3] = tmp;
}
row += alignedwidth * 2;
}
} else {
for (y = 1; y < height; y += 2) {
for (x = 0; x < alignedwidth; x += 2) {
tmp = row[x + 0];
row[x + 0] = row[x + 1];
row[x + 1] = tmp;
}
row += alignedwidth * 2;
}
}
}
GLOBAL_ASM(
glabel func0f172b5c

2
src/include/game/texdecompress.h
View File

@ -25,7 +25,7 @@ s32 texInflateMethod1(u8 *arg0, s32 width, s32 height, s32 format);
s32 func0f171ba8(u8 *arg0, s32 width, s32 height, u8 *arg3, s32 format);
s32 func0f17218c(s32 width, s32 height, u8 *arg2, u8 *arg3, s32 arg4, s32 format);
s32 func0f172554(u8 *arg0, s32 width, s32 height, u8 *arg3, u8 *arg4, s32 arg5, s32 format);
void func0f1729f8(u8 *arg0, s32 width, s32 height, s32 format);
void texSwapAltRowBytes(u8 *arg0, s32 width, s32 height, s32 format);
void func0f172b5c(u8 *arg0, s32 width, s32 arg2, s32 arg3, s32 chansize);
void func0f172e70(s32 *arg0, void *arg1, s32 arg2);
struct texloadthing *tex0f172e8c(s32 texturenum, struct texturething *arg1);