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;-----------------------------------------------------------------------------;; This file contains the output buffer color reading routines for Blending.;; Have pBits passed in as eax for now. Color value returned in mm1.; returns 16 bits for each color channel, but only lower eight are used. This is; so that the I can use pmullw multiplies in the blending code.;; These routines could all loose the punpck instruction by shifting to the correct; location. This wouldnt save alot but it could be done. Texread rouines; could not do that because of colorkey case.;;;-----------------------------------------------------------------------------
include(`texread.mh')dnl
.586.model flat.code
INCLUDE iammx.incINCLUDE offs_acp.inc
texreadVars(); 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.
;-----------------------------------------------------------------------------;; Read_B8G8R8;; Reads output buffer in BGR-888 format.;;-----------------------------------------------------------------------------;D3DCOLOR Read_B8G8R8(PUINT8 pBits);{ PUBLIC _MMX_BufRead_B8G8R8_MMX_BufRead_B8G8R8: ;PUINT32 pSurface = (PUINT32)pBits; movzx edx, byte ptr [eax+1] or dh, byte ptr [eax+2] movzx eax, byte ptr [eax] shl edx, 8 or edx, eax
;return *pSurface | 0xff000000; or edx, 0ff000000h movd mm1, edx pxor mm2, mm2 ; Zero out mm1 for unpacking punpcklbw mm1, mm2 ret;}
;-----------------------------------------------------------------------------;; Read_B8G8R8X8;; Reads output buffer in BGR-888x format.;;-----------------------------------------------------------------------------;D3DCOLOR Read_B8G8R8X8(PUINT8 pBits);{ PUBLIC _MMX_BufRead_B8G8R8X8_MMX_BufRead_B8G8R8X8: ;PUINT32 pSurface = (PUINT32)pBits; movd mm1, dword ptr [eax]
;return *pSurface | 0xff000000; por mm1, MMWORD PTR SetAlphaTo0xFF pxor mm2, mm2 ; Zero out mm1 for unpacking punpcklbw mm1, mm2 ret;}
;-----------------------------------------------------------------------------;; Read_B8G8R8A8;; Reads output in BGRA-8888 format.;;-----------------------------------------------------------------------------;D3DCOLOR Read_B8G8R8A8(PUINT8 pBits);{ PUBLIC _MMX_BufRead_B8G8R8A8_MMX_BufRead_B8G8R8A8:
;PUINT32 pSurface = (PUINT32)pBits; movd mm1, dword ptr [eax]
;return *pSurface; pxor mm2, mm2 ; Zero out mm1 for unpacking punpcklbw mm1, mm2 ret;}
;-----------------------------------------------------------------------------;; Read_B5G6R5;; Reads output in BGR-565 format.;;-----------------------------------------------------------------------------;D3DCOLOR Read_B5G6R5(PUINT8 pBits);{ PUBLIC _MMX_BufRead_B5G6R5_MMX_BufRead_B5G6R5:
;UINT16 uPixel = *(PUINT16)pBits; movzx eax, word ptr [eax]
;D3DCOLOR Color = RGBA_MAKE(( uPixel >> 8 ) & 0xf8, ; (( uPixel >> 3) & 0xfc ), ; (( uPixel << 3) & 0xf8 ), ; 0xff); movd mm1, eax ; Make two more copies of input color movq mm2, mm1 ; Could possibly use eax to shift blue.
pand mm1, MaskGreen565to888 ; MaskGreen565to888 is in memory psllq mm2, RedShift565to888 ; RedShift should be an immediate
pand mm2, MaskRed565to888 ; MaskRed565to888 in memory. psllq mm1, GreenShift565to888
shl eax, BlueShift565to888 por mm1, mm2
and eax, MaskBlue565to888 movd mm2, eax
por mm1, SetAlphato0xFF por mm1, mm2
pxor mm2, mm2 ; Zero out mm1 for unpacking. punpcklbw mm1, mm2
;return Color; ret;}
;-----------------------------------------------------------------------------;; Read_B5G5R5;; Reads output in BGR-555 format.;;-----------------------------------------------------------------------------;D3DCOLOR Read_B5G5R5(PUINT8 pBits);{ PUBLIC _MMX_BufRead_B5G5R5_MMX_BufRead_B5G5R5:
;UINT16 uPixel = *(PUINT16)pBits; movzx eax, word ptr [eax]
;D3DCOLOR Color = RGBA_MAKE(( uPixel >> 7 ) & 0xf8, ; (( uPixel >> 2) & 0xf8 ), ; (( uPixel << 3) & 0xf8 ), ; 0xff); movd mm1, eax ; Make two more copies of input color movq mm2, mm1
pand mm1, MaskGreen555to888 ; MaskGreen555to888 is in memory psllq mm2, RedShift555to888 ; RedShift should be an immediate
pand mm2, MaskRed555to888 ; MaskRed555to888 in memory. psllq mm1, GreenShift555to888
shl eax, BlueShift555to888 por mm1, mm2
and eax, MaskBlue555to888 movd mm2, eax
por mm1, SetAlphato0xFF por mm1, mm2
pxor mm2, mm2 ; Zero out mm1 for unpacking punpcklbw mm1, mm2
;return Color; ret;}
;-----------------------------------------------------------------------------;; Read_B5G5R5A1;; Reads output in BGRA-1555 format.;;-----------------------------------------------------------------------------;D3DCOLOR Read_B5G5R5A1(PUINT8 pBits);{ PUBLIC _MMX_BufRead_B5G5R5A1_MMX_BufRead_B5G5R5A1:
;UINT16 iPixel = *(PINT16)pBits; movzx eax, word ptr [eax]
;D3DCOLOR Color = RGBA_MAKE(( iPixel >> 7 ) & 0xf8, ; (( iPixel >> 2) & 0xf8 ), ; (( iPixel << 3) & 0xf8 ), ; (iPixel >> 15) & 0xff); movd mm1, eax ; Make two more copies of input color movq mm2, mm1 mov edx, eax
pand mm1, MaskAlpha1555to8888 ; MaskAlpha1555to8888 is in memory psllq mm2, RedShift1555to8888 ; RedShift should be an immediate
pand mm2, MaskRed1555to8888 ; MaskRed1555to8888 in memory. psllq mm1, AlphaShift1555to8888 ; shift bit to top of dword
psrad mm1, 7 ; copy bit to upper 8 bits. shl eax, BlueShift1555to8888 por mm1, mm2 shl edx, GreenShift1555to8888 and eax, MaskBlue1555to8888 movd mm2, eax por mm1, mm2 and edx, MaskGreen1555to8888 movd mm2, edx por mm1, mm2
pxor mm2, mm2 ; Zero out mm1 for unpacking punpcklbw mm1, mm2
;return Color; ret;}
;-----------------------------------------------------------------------------;; Read_Palette8;; Reads output buffer in Palette8 format.;;-----------------------------------------------------------------------------;D3DCOLOR Read_Palette8(PUINT8 pBits);{ PUBLIC _MMX_BufRead_Palette8_MMX_BufRead_Palette8: ; Always return 0. ; ATTENTION - This is not correct. But We assume Palette8 format will ; normally not be used for alpha blending. pxor mm1, mm1 ret;}
END
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