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;-----------------------------------------------------------------------------; Monolith 22. Gouraud 888;; This monolith selects code to draw either left or right.;; Globals (ATTENTION. Need to put in stack memory so can multi-process);; uSpans - Count containing the number of spans.; StackPos - Saves stack position.;; Register Usage:;; eax - Number of pixels to draw; ecx - Prim pointer. Same as in non-monolithic loop code. (i.e. C codes pCtx->pPrim); edi - Pointer to Screen Buffer.; ebp - Rast Span Pointer. Same as in non-monolithic loop code. (i.e. pS in C code); mm0 - contains four color components.; mm1 - contains delta color components.; mm3 - Temp for color conversion.; mm5 - temp for color conversion.;; Both Left to Right and Right to Left are very similar.;; Psuedo Code;; loop:; {; copy mm0 to mm5; convert mm5 to 888.; write color; }; if (done drawing) {exit loop} (dec eax / jz NoMorePixelsLtoR); increment colors (mm0+=mm1); increment screen pointer (add edi, 4); jump to top of loop;;-----------------------------------------------------------------------------
INCLUDE iammx.incINCLUDE offs_acp.inc
; Names are read LSB to MSB, so B5G6R5 means five bits of blue starting; at the LSB, then six bits of green, then five bits of red.
;TBD check to see if this value is correct.COLOR_SHIFT equ 8
.586.model flat
; Big seperating lines seperate code into span code; and loop code. If span and loop are not going to; end up being combined then it will be easy to; seperate the code.
.data
; Need externs for all of the variables that are needed for various beads
EXTERN MaskRed565to888:MMWORDEXTERN MaskGreen565to888:MMWORDEXTERN MaskBlue565to888:MMWORD
EXTERN MaskRed555to888:MMWORDEXTERN MaskGreen555to888:MMWORDEXTERN MaskBlue555to888:MMWORD
EXTERN MaskAlpha1555to8888:MMWORDEXTERN MaskRed1555to8888:MMWORDEXTERN MaskGreen1555to8888:MMWORDEXTERN MaskBlue1555to8888:MMWORD
; TBD. I think that I want to do 0xffff instead of 0xff. This will; have to be checked. There is a value very similiar to this in; buf write.EXTERN SetAlphato0xffff:MMWORDEXTERN SetAlphato0xff:MMWORD
; TODO This equate are identical to the ones in texread.mas. Maybe they should be in a common .inc file.RedShift565to888 equ 8GreenShift565to888 equ 5BlueShift565to888 equ 3
RedShift555to888 equ 9GreenShift555to888 equ 6BlueShift555to888 equ 3
AlphaShift1555to8888 equ 16RedShift1555to8888 equ 9GreenShift1555to8888 equ 6BlueShift1555to8888 equ 3
EXTERN Zero:MMWORD
EXTERN SetAlphato0xff:MMWORDEXTERN u888to565RedBlueMask:MMWORDEXTERN u888to565GreenMask:MMWORDEXTERN u888to565Multiplier:MMWORDEXTERN uVal0x000007ff03ff07ff:MMWORDEXTERN uVal0x0000078003c00780:MMWORDEXTERN u888to555RedBlueMask:MMWORDEXTERN u888to555GreenMask:MMWORDEXTERN u888to555Multiplier:MMWORDEXTERN uVal0x000007ff07ff07ff:MMWORDEXTERN uVal0x0000078007800780:MMWORD
;-----------------------------------------------------------------------------; Span VariablesStackPos dd ?uSpans dd ?;-----------------------------------------------------------------------------
;-----------------------------------------------------------------------------; Loop Variables
iSurfaceStep dd ?uPix dd ?
;-----------------------------------------------------------------------------
.code
PUBLIC _MMXMLRast_22_MMXMLRast_22: push ebp mov StackPos, esp mov eax, esp sub esp, 0Ch ; This will need to change if stack frame size changes. push ebx push edi
xor edi, edi
; Put pCtx into ebx mov ebx, [eax+8]
;PD3DI_RASTPRIM pP = pCtx->pPrim; mov ecx, [ebx+RASTCTX_pPrim]
; ebx is free after this since gouraud does not need information from pCtx.
;while (pP) ;{PrimLoop: cmp ecx, 0 je ExitPrimLoop
;UINT16 uSpans = pP->uSpans; movzx eax, word ptr [ecx+RASTPRIM_uSpans] mov uSpans, eax
;PD3DI_RASTSPAN pS = (PD3DI_RASTSPAN)(pP + 1); mov ebp, ecx add ebp, SIZEOF_RASTPRIM
;while (uSpans-- > 0) ;{SpanLoop: mov edx, uSpans mov eax, edx dec eax mov uSpans, eax test edx, edx jle ExitSpanLoop
mov edi, dword ptr [ebp+RASTSPAN_pSurface] movzx eax, word ptr [ebp+RASTSPAN_uPix]
;if (pP->uFlags & D3DI_RASTPRIM_X_DEC) ;{ mov edx, [ecx+RASTPRIM_uFlags] and edx, D3DI_RASTPRIM_X_DEC test edx, edx jz LeftToRightSpan
; SCREWED UP RIGHT TO LEFT CASE movq mm0, MMWORD PTR [ebp+RASTSPAN_uB] movq mm1, MMWORD PTR [ecx+RASTPRIM_iDBDX]
beginingpixelsRtoL: ;WritePixel
; Convert color. movq mm5, mm0 psrlw mm5, 8 ; Convert color1 from 8.8 two 0.8 packuswb mm5, mm7 ; pack one color1 movd edx, mm5 and edx, 000ffffffh mov [edi], edx
dec eax ; Reduce Pixel count jz NoMorePixelsRtoL
sub edi, 4 ; decrease destination pointer
;pS->uB += pP->iDBDX; pS->uG += pP->iDGDX; ;pS->uR += pP->iDRDX; pS->uA += pP->iDADX; paddw mm0, mm1
jmp beginingpixelsRtoL
NoMorePixelsRtoL: jmp DoneSpanDirif ;else ;{LeftToRightSpan:
; NORMAL LEFT TO RIGHT CASE movq mm0, MMWORD PTR [ebp+RASTSPAN_uB] movq mm1, MMWORD PTR [ecx+RASTPRIM_iDBDX]
beginingpixelsLtoR: ;WritePixel
; Convert color. movq mm5, mm0 psrlw mm5, 8 ; Convert color1 from 8.8 two 0.8 packuswb mm5, mm7 ; pack one color1 movd edx, mm5 and edx, 000ffffffh mov [edi], edx
dec eax ; Reduce Pixel count jz NoMorePixelsLtoR
add edi, 4 ; Increase destination pointer.
;pS->uB += pP->iDBDX; pS->uG += pP->iDGDX; ;pS->uR += pP->iDRDX; pS->uA += pP->iDADX; paddw mm0, mm1
jmp beginingpixelsLtoR
NoMorePixelsLtoR:
;}DoneSpanDirif:
; Setup Code Ends; ----------------------------------------------------------------------------------------------------------------; Loop Code Begins
ExitPixelLoop:; Loop code ends
;-----------------------------------------------------------------------------; LoopAny code ends here;-----------------------------------------------------------------------------
;pS++; add ebp, SIZEOF_RASTSPAN
;} jmp SpanLoopExitSpanLoop: ;pP = pP->pNext; mov ecx, [ecx+RASTPRIM_pNext] ;} jmp PrimLoop
ExitPrimLoop: ;_asm{ emms ;}
;return S_OK; xor eax, eax;} pop edi pop ebx mov esp, StackPos pop ebp ret
END
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