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283 lines
7.2 KiB
283 lines
7.2 KiB
;-----------------------------------------------------------------------------
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; Monolith 22. Gouraud 888
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;
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; This monolith selects code to draw either left or right.
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;
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; Globals (ATTENTION. Need to put in stack memory so can multi-process)
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;
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; uSpans - Count containing the number of spans.
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; StackPos - Saves stack position.
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;
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; Register Usage:
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;
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; eax - Number of pixels to draw
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; ecx - Prim pointer. Same as in non-monolithic loop code. (i.e. C codes pCtx->pPrim)
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; edi - Pointer to Screen Buffer.
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; ebp - Rast Span Pointer. Same as in non-monolithic loop code. (i.e. pS in C code)
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; mm0 - contains four color components.
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; mm1 - contains delta color components.
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; mm3 - Temp for color conversion.
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; mm5 - temp for color conversion.
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;
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; Both Left to Right and Right to Left are very similar.
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;
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; Psuedo Code
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;
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; loop:
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; {
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; copy mm0 to mm5
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; convert mm5 to 888.
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; write color
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; }
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; if (done drawing) {exit loop} (dec eax / jz NoMorePixelsLtoR)
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; increment colors (mm0+=mm1)
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; increment screen pointer (add edi, 4)
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; jump to top of loop
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;
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;-----------------------------------------------------------------------------
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INCLUDE iammx.inc
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INCLUDE offs_acp.inc
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; Names are read LSB to MSB, so B5G6R5 means five bits of blue starting
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; at the LSB, then six bits of green, then five bits of red.
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;TBD check to see if this value is correct.
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COLOR_SHIFT equ 8
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.586
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.model flat
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; Big seperating lines seperate code into span code
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; and loop code. If span and loop are not going to
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; end up being combined then it will be easy to
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; seperate the code.
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.data
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; Need externs for all of the variables that are needed for various beads
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EXTERN MaskRed565to888:MMWORD
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EXTERN MaskGreen565to888:MMWORD
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EXTERN MaskBlue565to888:MMWORD
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EXTERN MaskRed555to888:MMWORD
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EXTERN MaskGreen555to888:MMWORD
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EXTERN MaskBlue555to888:MMWORD
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EXTERN MaskAlpha1555to8888:MMWORD
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EXTERN MaskRed1555to8888:MMWORD
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EXTERN MaskGreen1555to8888:MMWORD
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EXTERN MaskBlue1555to8888:MMWORD
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; TBD. I think that I want to do 0xffff instead of 0xff. This will
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; have to be checked. There is a value very similiar to this in
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; buf write.
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EXTERN SetAlphato0xffff:MMWORD
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EXTERN SetAlphato0xff:MMWORD
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; TODO This equate are identical to the ones in texread.mas. Maybe they should be in a common .inc file.
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RedShift565to888 equ 8
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GreenShift565to888 equ 5
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BlueShift565to888 equ 3
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RedShift555to888 equ 9
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GreenShift555to888 equ 6
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BlueShift555to888 equ 3
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AlphaShift1555to8888 equ 16
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RedShift1555to8888 equ 9
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GreenShift1555to8888 equ 6
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BlueShift1555to8888 equ 3
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EXTERN Zero:MMWORD
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EXTERN SetAlphato0xff:MMWORD
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EXTERN u888to565RedBlueMask:MMWORD
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EXTERN u888to565GreenMask:MMWORD
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EXTERN u888to565Multiplier:MMWORD
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EXTERN uVal0x000007ff03ff07ff:MMWORD
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EXTERN uVal0x0000078003c00780:MMWORD
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EXTERN u888to555RedBlueMask:MMWORD
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EXTERN u888to555GreenMask:MMWORD
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EXTERN u888to555Multiplier:MMWORD
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EXTERN uVal0x000007ff07ff07ff:MMWORD
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EXTERN uVal0x0000078007800780:MMWORD
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;-----------------------------------------------------------------------------
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; Span Variables
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StackPos dd ?
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uSpans dd ?
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;-----------------------------------------------------------------------------
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;-----------------------------------------------------------------------------
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; Loop Variables
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iSurfaceStep dd ?
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uPix dd ?
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;-----------------------------------------------------------------------------
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.code
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PUBLIC _MMXMLRast_22
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_MMXMLRast_22:
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push ebp
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mov StackPos, esp
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mov eax, esp
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sub esp, 0Ch ; This will need to change if stack frame size changes.
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push ebx
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push edi
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xor edi, edi
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; Put pCtx into ebx
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mov ebx, [eax+8]
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;PD3DI_RASTPRIM pP = pCtx->pPrim;
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mov ecx, [ebx+RASTCTX_pPrim]
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; ebx is free after this since gouraud does not need information from pCtx.
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;while (pP)
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;{
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PrimLoop:
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cmp ecx, 0
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je ExitPrimLoop
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;UINT16 uSpans = pP->uSpans;
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movzx eax, word ptr [ecx+RASTPRIM_uSpans]
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mov uSpans, eax
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;PD3DI_RASTSPAN pS = (PD3DI_RASTSPAN)(pP + 1);
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mov ebp, ecx
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add ebp, SIZEOF_RASTPRIM
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;while (uSpans-- > 0)
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;{
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SpanLoop:
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mov edx, uSpans
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mov eax, edx
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dec eax
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mov uSpans, eax
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test edx, edx
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jle ExitSpanLoop
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mov edi, dword ptr [ebp+RASTSPAN_pSurface]
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movzx eax, word ptr [ebp+RASTSPAN_uPix]
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;if (pP->uFlags & D3DI_RASTPRIM_X_DEC)
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;{
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mov edx, [ecx+RASTPRIM_uFlags]
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and edx, D3DI_RASTPRIM_X_DEC
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test edx, edx
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jz LeftToRightSpan
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; SCREWED UP RIGHT TO LEFT CASE
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movq mm0, MMWORD PTR [ebp+RASTSPAN_uB]
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movq mm1, MMWORD PTR [ecx+RASTPRIM_iDBDX]
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beginingpixelsRtoL:
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;WritePixel
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; Convert color.
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movq mm5, mm0
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psrlw mm5, 8 ; Convert color1 from 8.8 two 0.8
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packuswb mm5, mm7 ; pack one color1
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movd edx, mm5
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and edx, 000ffffffh
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mov [edi], edx
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dec eax ; Reduce Pixel count
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jz NoMorePixelsRtoL
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sub edi, 4 ; decrease destination pointer
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;pS->uB += pP->iDBDX; pS->uG += pP->iDGDX;
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;pS->uR += pP->iDRDX; pS->uA += pP->iDADX;
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paddw mm0, mm1
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jmp beginingpixelsRtoL
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NoMorePixelsRtoL:
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jmp DoneSpanDirif
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;else
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;{
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LeftToRightSpan:
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; NORMAL LEFT TO RIGHT CASE
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movq mm0, MMWORD PTR [ebp+RASTSPAN_uB]
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movq mm1, MMWORD PTR [ecx+RASTPRIM_iDBDX]
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beginingpixelsLtoR:
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;WritePixel
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; Convert color.
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movq mm5, mm0
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psrlw mm5, 8 ; Convert color1 from 8.8 two 0.8
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packuswb mm5, mm7 ; pack one color1
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movd edx, mm5
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and edx, 000ffffffh
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mov [edi], edx
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dec eax ; Reduce Pixel count
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jz NoMorePixelsLtoR
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add edi, 4 ; Increase destination pointer.
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;pS->uB += pP->iDBDX; pS->uG += pP->iDGDX;
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;pS->uR += pP->iDRDX; pS->uA += pP->iDADX;
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paddw mm0, mm1
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jmp beginingpixelsLtoR
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NoMorePixelsLtoR:
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;}
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DoneSpanDirif:
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; Setup Code Ends
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; ----------------------------------------------------------------------------------------------------------------
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; Loop Code Begins
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ExitPixelLoop:
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; Loop code ends
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;-----------------------------------------------------------------------------
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; LoopAny code ends here
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;-----------------------------------------------------------------------------
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;pS++;
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add ebp, SIZEOF_RASTSPAN
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;}
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jmp SpanLoop
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ExitSpanLoop:
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;pP = pP->pNext;
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mov ecx, [ecx+RASTPRIM_pNext]
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;}
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jmp PrimLoop
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ExitPrimLoop:
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;_asm{
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emms
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;}
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;return S_OK;
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xor eax, eax
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;}
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pop edi
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pop ebx
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mov esp, StackPos
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pop ebp
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ret
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END
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