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Decompile texGetAverageRed

This commit is contained in:
Ryan Dwyer 2022-02-20 10:12:28 +10:00
parent 8672c941ef
commit 3cec795c9a
2 changed files with 26 additions and 51 deletions
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75
src/game/texdecompress.c
View File

@ -305,52 +305,27 @@ s32 texAlignIndices(u8 *src, s32 width, s32 height, s32 format, u8 *dst)
return outptr - dst;
}
GLOBAL_ASM(
glabel func0f16ee58
/* f16ee58: 000462c3 */ sra $t4,$a0,0xb
/* f16ee5c: 318d001f */ andi $t5,$t4,0x1f
/* f16ee60: 000d70c0 */ sll $t6,$t5,0x3
/* f16ee64: 00047b43 */ sra $t7,$a0,0xd
/* f16ee68: 31f80007 */ andi $t8,$t7,0x7
/* f16ee6c: 01d8c825 */ or $t9,$t6,$t8
/* f16ee70: 000562c3 */ sra $t4,$a1,0xb
/* f16ee74: 318d001f */ andi $t5,$t4,0x1f
/* f16ee78: 00057343 */ sra $t6,$a1,0xd
/* f16ee7c: 31d80007 */ andi $t8,$t6,0x7
/* f16ee80: 000d78c0 */ sll $t7,$t5,0x3
/* f16ee84: 01f86025 */ or $t4,$t7,$t8
/* f16ee88: 032c6821 */ addu $t5,$t9,$t4
/* f16ee8c: 000672c3 */ sra $t6,$a2,0xb
/* f16ee90: 31cf001f */ andi $t7,$t6,0x1f
/* f16ee94: 0006cb43 */ sra $t9,$a2,0xd
/* f16ee98: 332c0007 */ andi $t4,$t9,0x7
/* f16ee9c: 000fc0c0 */ sll $t8,$t7,0x3
/* f16eea0: 030c7025 */ or $t6,$t8,$t4
/* f16eea4: 01ae7821 */ addu $t7,$t5,$t6
/* f16eea8: 0007cac3 */ sra $t9,$a3,0xb
/* f16eeac: 3338001f */ andi $t8,$t9,0x1f
/* f16eeb0: 00076b43 */ sra $t5,$a3,0xd
/* f16eeb4: 31ae0007 */ andi $t6,$t5,0x7
/* f16eeb8: 001860c0 */ sll $t4,$t8,0x3
/* f16eebc: 018ec825 */ or $t9,$t4,$t6
/* f16eec0: 01f95821 */ addu $t3,$t7,$t9
/* f16eec4: 256b0002 */ addiu $t3,$t3,0x2
/* f16eec8: 000b1883 */ sra $v1,$t3,0x2
/* f16eecc: afa40000 */ sw $a0,0x0($sp)
/* f16eed0: afa50004 */ sw $a1,0x4($sp)
/* f16eed4: afa60008 */ sw $a2,0x8($sp)
/* f16eed8: 04610002 */ bgez $v1,.L0f16eee4
/* f16eedc: afa7000c */ sw $a3,0xc($sp)
/* f16eee0: 00001825 */ or $v1,$zero,$zero
.L0f16eee4:
/* f16eee4: 28610100 */ slti $at,$v1,0x100
/* f16eee8: 14200002 */ bnez $at,.L0f16eef4
/* f16eeec: 00000000 */ nop
/* f16eef0: 240300ff */ addiu $v1,$zero,0xff
.L0f16eef4:
/* f16eef4: 03e00008 */ jr $ra
/* f16eef8: 00601025 */ or $v0,$v1,$zero
);
s32 texGetAverageRed(u16 colour1, u16 colour2, u16 colour3, u16 colour4)
{
s32 value = 0;
value += ((colour1 >> 11) & 0x1f) << 3 | (colour1 >> 13) & 7;
value += ((colour2 >> 11) & 0x1f) << 3 | (colour2 >> 13) & 7;
value += ((colour3 >> 11) & 0x1f) << 3 | (colour3 >> 13) & 7;
value += ((colour4 >> 11) & 0x1f) << 3 | (colour4 >> 13) & 7;
value = (value + 2) >> 2;
if (value < 0) {
value = 0;
}
if (value > 0xff) {
value = 0xff;
}
return value;
}
GLOBAL_ASM(
glabel func0f16eefc
@ -677,7 +652,7 @@ glabel func0f16f0f4
/* f16f354: 01f86021 */ addu $t4,$t7,$t8
/* f16f358: 95900000 */ lhu $s0,0x0($t4)
/* f16f35c: 02403025 */ or $a2,$s2,$zero
/* f16f360: 0fc5bb96 */ jal func0f16ee58
/* f16f360: 0fc5bb96 */ jal texGetAverageRed
/* f16f364: 02003825 */ or $a3,$s0,$zero
/* f16f368: 0040b025 */ or $s6,$v0,$zero
/* f16f36c: 32a4ffff */ andi $a0,$s5,0xffff
@ -938,7 +913,7 @@ glabel func0f16f0f4
/* f16f718: 000d5840 */ sll $t3,$t5,0x1
/* f16f71c: 012b7821 */ addu $t7,$t1,$t3
/* f16f720: 95f00000 */ lhu $s0,0x0($t7)
/* f16f724: 0fc5bb96 */ jal func0f16ee58
/* f16f724: 0fc5bb96 */ jal texGetAverageRed
/* f16f728: 02003825 */ or $a3,$s0,$zero
/* f16f72c: 0040b025 */ or $s6,$v0,$zero
/* f16f730: 32a4ffff */ andi $a0,$s5,0xffff
@ -1024,7 +999,7 @@ glabel func0f16f0f4
/* f16f864: 97300000 */ lhu $s0,0x0($t9)
/* f16f868: 3225ffff */ andi $a1,$s1,0xffff
/* f16f86c: 3246ffff */ andi $a2,$s2,0xffff
/* f16f870: 0fc5bb96 */ jal func0f16ee58
/* f16f870: 0fc5bb96 */ jal texGetAverageRed
/* f16f874: 02003825 */ or $a3,$s0,$zero
/* f16f878: 0040b025 */ or $s6,$v0,$zero
/* f16f87c: 32a4ffff */ andi $a0,$s5,0xffff
@ -2624,7 +2599,7 @@ void texInflateRle(u8 *dst, s32 blockstotal)
/**
* Populate a lookup table by reading it out of the bit string.
*
* The first 11 bits denate the number of colours in the lookup table.
* The first 11 bits denote the number of colours in the lookup table.
* The data following this is a list of colours, where each colour is sized
* according to the texture's format.
*

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

@ -7,7 +7,7 @@
void func0f16e810(u32 arg0);
s32 texInflateZlib(u8 *src, u8 *dst, s32 arg2, s32 forcenumimages, struct texturething *arg4, s32 arg5);
s32 texAlignIndices(u8 *arg0, s32 width, s32 height, s32 format, u8 *dst);
u32 func0f16ee58(void);
s32 texGetAverageRed(u16 colour1, u16 colour2, u16 colour3, u16 colour4);
u32 func0f16eefc(void);
u32 func0f16efa0(void);
u32 func0f16f044(void);