mirror of
https://github.com/thug1src/thug.git
synced 2025-01-22 05:43:47 +00:00
277 lines
7.5 KiB
Plaintext
277 lines
7.5 KiB
Plaintext
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;------------------------------------------------------------------------------------------------------------------------------------
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; post-process fog effect
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; (this will be replaced by a vu1 routine)
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.global FogDma
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.global FogPalette
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.align 7 ; align to multiple of 8 qwords (2^7 bytes) to give fastest dma transfer
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FogDma:
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; preswizzled 256-colour palette, 32-bit entries
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DMAcnt *
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DIRECT *
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; set registers for palette transfer to vram
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.quad 0x00000000_0000000E_10000000_00000004 ; GifTag (GS_A_D,1,PACKED,0,0,0,4)
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.quad 0x00000000_00000050_00013000_00000000 ; BITBLTBUF (0,0,0,0x3000,1,PSMCT32)
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.quad 0x00000000_00000051_00000000_00000000 ; TRXPOS (0,0,0,0,0)
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.quad 0x00000000_00000052_00000010_00000010 ; TRXREG (16,16)
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.quad 0x00000000_00000053_00000000_00000000 ; TRXDIR (0)
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; image mode giftag for palette
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.quad 0x00000000_00000000_08000000_00000040 ; GifTag (0,0,IMAGE,0,0,0,64)
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FogPalette:
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; the palette itself (which is filled in at run-time)
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.rept 256
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.int 0
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.endr
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.quad 0x00000000_0000000E_10AB4000_00008008 ; GifTag (GS_A_D,1,PACKED,SPRITE|TME|ABE|FST,1,1,8)
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.quad 0x00000000_0000003F_00000000_00000000 ; TEXFLUSH (0)
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.quad 0x00000000_00000014_00000000_00000001 ; TEX1_1 (1,0,NEAREST,NEAREST,0,0,0)
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.quad 0x00000000_00000008_00000000_00003F73 ; CLAMP_1 (REGION_REPEAT,REPEAT,0x3F7,0,0,0)
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.quad 0x00000000_00000040_01BF0000_027F0000 ; SCISSOR_1 (0,447,0,639)
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.quad 0x00000000_00000042_00000000_00000044 ; ALPHA_1 (Cs,Cd,As,Cd,0)
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.quad 0x00000000_00000047_00000000_00050000 ; TEST_1 (ZGEQUAL,1,0,0,0,0,0,0)
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.quad 0x00000000_0000004C_00000000_000A0000 ; FRAME_1 (0,10,PSMCT32,0)
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.quad 0x00000000_0000004E_00000001_010000D2 ; ZBUF_1 (0xD2,PSMZ24,1)
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.EndDirect
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.EndDmaData
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; break screen into halves, otherwise source texture > 1024 in width
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; left half
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DMAcall *,HalfScreen
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DIRECT *
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; set up source and dest coordinate origins
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.quad 0x00000000_0000000E_10AB4000_00008002 ; GifTag (GS_A_D,1,PACKED,SPRITE|TME|ABE|FST,1,1,1)
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.quad 0x00000000_00000006_2006000E_A9351A40 ; TEX0_1 (0x1A40,20,PSMT8,10,10,RGBA,DECAL,0x3000,PSMCT32,CSM1,0,1)
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.quad 0x00000000_00000018_00000000_00001400 ; XYOFFSET_1(0x1400,0)
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.EndDirect
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.EndDmaData
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; right half
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DMAcall *,HalfScreen
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DIRECT *
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; set up source and dest coordinate origins
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.quad 0x00000000_0000000E_10AB4000_00008002 ; GifTag (GS_A_D,1,PACKED,SPRITE|TME|ABE|FST,1,1,1)
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.quad 0x00000000_00000006_2006000E_A9351AE0 ; TEX0_1 (0x1AE0,20,PSMT8,10,10,RGBA,DECAL,0x3000,PSMCT32,CSM1,0,1)
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.quad 0x00000000_00000018_00000000_00000000 ; XYOFFSET_1(0,0)
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.EndDirect
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.EndDmaData
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; restore and return
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DMAret *
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DIRECT *
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; restore any GS regs that we shouldn't have knackered
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.quad 0x00000000_0000000E_10000000_00008001 ; GifTag (GS_A_D,1,PACKED,0,0,1,1)
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.quad 0x00000000_00000008_00000000_00000000 ; CLAMP_1 (REPEAT,REPEAT,0,0,0,0)
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.EndDirect
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.EndDmaData
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; apply fogging effect to half of the screen (left or right)
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.align 7 ; align to 8 qwords
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HalfScreen:
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; This innocent-looking piece of assembler generates 280K of dma data!
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; (It will eventually be replaced with a small VU1 progam that generates it on the fly, saving memory and dma bandwidth.)
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DMAret *
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DIRECT *
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.if 0 ; Change to 1 to get the full-screen fog back, and lose 280K of memory
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.quad 0x00000000_00005353_44000000_0000A300 ; GifTag (UV|XYZ2<<4|UV<<8|XYZ2<<12,4,REGLIST,0,0,1,8960)
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; loop over quarter-pages
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qpageX = 0
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.rept 10
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; use diagonally facing quarter-page as the source
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qpageU = (qpageX^0x200)*2+8
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qpageY = 0
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.rept 28
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; use diagonally facing quarter-page as the source
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qpageV = (qpageY^0x100)*2+8
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X = qpageX+0x1400
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U = qpageU
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.rept 4
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Y = qpageY
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V = qpageV+0x20
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.rept 4
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; even column
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.short U+0x40,V,0,0
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.short X,Y,0xFFFF,0x0080
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.short U+0xC0,V+0x20,0,0
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.short X+0x80,Y+0x20,0xFFFF,0x0080
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; odd column
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.short U,V+0x40,0,0
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.short X,Y+0x20,0xFFFF,0x0080
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.short U+0x80,V+0x60,0,0
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.short X+0x80,Y+0x40,0xFFFF,0x0080
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Y = Y+0x40
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V = V+0x80
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.endr
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X = X+0x80
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U = U+0x100
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.endr
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qpageY = qpageY+0x100
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.endr
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qpageX = qpageX+0x200
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.endr
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.else
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; Mick: Just bunged in something to make it not crash
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.quad 0x00000000_0000000E_10000000_00008001 ; GifTag (GS_A_D,1,PACKED,0,0,1,1)
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.quad 0x00000000_00000008_00000000_00000000 ; CLAMP_1 (REPEAT,REPEAT,0,0,0,0)
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.endif
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.EndDirect
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.EndDmaData
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;------------------------------------------------------------------------------------------------------------------------------------
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.if 0
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; BILLBOARD TEST
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.global BillboardDma
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.global BillboardContext
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.global BillboardMats
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.align 4
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BillboardDma:
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DMAret *
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UNPACK 1, 1, V4_32, 0, *
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; VU context... 32
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.quad 0x0000000C_0000000F_10000020_3400000C
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BillboardContext:
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.quad 0,0,0,0
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BillboardMats:
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.quad 0,0,0,0 ; world to camera matrix
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.quad 0,0,0,0 ; camera to screen matrix
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; axial billboards... 86
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.quad 0x00000024_00000512_300E4056_35C0000C
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.float 0,0,1,0 ; stq0
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.int 90,45,15,128 ; rgba0
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.float 0,100,0,0 ; xyz
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.float 1,0,1,0 ; stq1
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.int 30,15,5,128 ; rgba1
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.float 10,100,0,0 ; w/2,h/2
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.float 0,1,1,0 ; stq2
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.int 90,45,15,128 ; rgba2
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.float 0,0,0,0 ; tx,ty,tz
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.float 1,1,1,0 ; stq3
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.int 30,15,5,128 ; rgba3
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.float 0,1,0,0 ; axis
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.float 0,0,1,0 ; stq0
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.int 90,45,15,128 ; rgba0
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.float 70.71,270.71,0,0 ; xyz
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.float 1,0,1,0 ; stq1
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.int 30,15,5,128 ; rgba1
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.float 10,100,0,0 ; w/2,h/2
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.float 0,1,1,0 ; stq2
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.int 90,45,15,128 ; rgba2
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.float 0,0,0,0 ; tx,ty,tz
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.float 1,1,1,0 ; stq3
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.int 30,15,5,128 ; rgba3
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.float 0.7071,0.7071,0,0 ; axis
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.float 0,0,1,0 ; stq0
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.int 90,45,15,128 ; rgba0
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.float -70.71,270.71,0,0 ; xyz
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.float 1,0,1,0 ; stq1
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.int 30,15,5,128 ; rgba1
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.float 10,100,0,0 ; w/2,h/2
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.float 0,1,1,0 ; stq2
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.int 90,45,15,128 ; rgba2
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.float 0,0,0,0 ; tx,ty,tz
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.float 1,1,1,0 ; stq3
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.int 30,15,5,128 ; rgba3
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.float -0.7071,0.7071,0,0 ; axis
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; screen-aligned billboards... 84
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.quad 0x00000018_00000512_302E4054_35C08008
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.float 0,0,1,0 ; stq0
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.int 0,100,0,64 ; rgba0
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.float 141.42,341.42,0,0 ; xyz
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.float 1,0,1,0 ; stq1
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.int 0,100,0,64 ; rgba1
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.float 60,60,0,0 ; w/2,h/2
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.float 0,1,1,0 ; stq2
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.int 0,100,0,64 ; rgba2
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.float 0,0,10,0 ; tx,ty,tz
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.float 1,1,1,0 ; stq3
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.int 0,100,0,64 ; rgba3
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.float 0,0,0,0 ; axis
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.float 0,0,1,0 ; stq0
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.int 0,100,0,64 ; rgba0
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.float -141.42,341.42,0,0 ; xyz
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.float 1,0,1,0 ; stq1
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.int 0,100,0,64 ; rgba1
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.float 60,60,0,0 ; w/2,h/2
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.float 0,1,1,0 ; stq2
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.int 0,100,0,64 ; rgba2
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.float 0,0,10,0 ; tx,ty,tz
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.float 1,1,1,0 ; stq3
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.int 0,100,0,64 ; rgba3
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.float 0,0,0,0 ; axis
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.EndUnpack
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.EndDmaData
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.endif
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;------------------------------------------------------------------------------------------------------------------------------------
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