📄 render8bpp.h

📁 著名的任天堂FC游戏机模拟器VirtuaNes 085版的源码!
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//
// 8bit Normal
//
void	CDirectDraw::Render8bpp_Normal( LPBYTE lpRdr, LPBYTE lpDlt, DDSURFACEDESC2& ddsd, BOOL bForceWrite )
{
	LPBYTE	pScn = lpRdr;
	LPBYTE	pDst = (LPBYTE)ddsd.lpSurface;
	DWORD	width = SCREEN_WIDTH;
	DWORD	pitch = ddsd.lPitch;

	for( INT i = 0; i < SCREEN_HEIGHT; i++ ) {
		__asm {
			mov		esi, pScn
			mov		edi, pDst
			mov		ecx, width
			mov		edx, 0x40404040
_r8bn_loop:
			mov		eax, [esi+0]
			mov		ebx, [esi+4]
			or		eax, edx
			or		ebx, edx
			mov		[edi+0], eax
			mov		[edi+4], ebx

			lea		esi, [esi+8]
			lea		edi, [edi+8]
			sub		ecx, 8
			jg		_r8bn_loop
		}
		pScn += RENDER_WIDTH;
		pDst += pitch;
	}
}

//
// 8bit Scanline
//
void	CDirectDraw::Render8bpp_Scanline( LPBYTE lpRdr, LPBYTE lpDlt, DDSURFACEDESC2& ddsd, BOOL bForceWrite )
{
	LPBYTE	pScn = lpRdr;
	LPBYTE	pDst = (LPBYTE)ddsd.lpSurface;
	DWORD	width = SCREEN_WIDTH;
	DWORD	pitch = ddsd.lPitch;

	for( INT i = 0; i < SCREEN_HEIGHT; i++ ) {
		__asm {
			mov		esi, pScn
			mov		edi, pDst
			mov		ecx, width
			mov		edx, 0x40404040
_r8bs_loop:
			mov		eax, [esi+0]
			mov		ebx, [esi+4]
			or		eax, edx
			or		ebx, edx
			mov		[edi+0], eax
			mov		[edi+4], ebx

			lea		esi, [esi+8]
			lea		edi, [edi+8]
			sub		ecx, 8
			jg		_r8bs_loop
		}
		pDst += pitch;
		__asm {
			mov		esi, pScn
			mov		edi, pDst
			mov		ecx, width
			mov		edx, 0x80808080
_r8bs_loop2:
			mov		eax, [esi+0]
			mov		ebx, [esi+4]
			or		eax, edx
			or		ebx, edx
			mov		[edi+0], eax
			mov		[edi+4], ebx

			lea		esi, [esi+8]
			lea		edi, [edi+8]
			sub		ecx, 8
			jg		_r8bs_loop2
		}
		pScn += RENDER_WIDTH;
		pDst += pitch;
	}
}

//
// 8bit Double
//
void	CDirectDraw::Render8bpp_Double( LPBYTE lpRdr, LPBYTE lpDlt, DDSURFACEDESC2& ddsd, BOOL bForceWrite )
{
	LPBYTE	pScn = lpRdr;
	LPBYTE	pDst = (LPBYTE)ddsd.lpSurface;
	DWORD	width = SCREEN_WIDTH;
	DWORD	pitch = ddsd.lPitch;

	if( !IsMMX() ) {
	for( INT i = 0; i < SCREEN_HEIGHT; i++ ) {
		__asm {
			mov		esi, pScn
			mov		edi, pDst
			mov		ecx, width
			mov		edx, 0x40404040
_r8bn_d_loop:
			mov		al, [esi+1]
			mov		ah, al
			shl		eax, 16
			mov		al, [esi+0]
			mov		ah, al
			or		eax, edx
			mov		[edi+ 0], eax

			mov		al, [esi+3]
			mov		ah, al
			shl		eax, 16
			mov		al, [esi+2]
			mov		ah, al
			or		eax, edx
			mov		[edi+ 4], eax

			mov		al, [esi+5]
			mov		ah, al
			shl		eax, 16
			mov		al, [esi+4]
			mov		ah, al
			or		eax, edx
			mov		[edi+ 8], eax

			mov		al, [esi+7]
			mov		ah, al
			shl		eax, 16
			mov		al, [esi+6]
			mov		ah, al
			or		eax, edx
			mov		[edi+12], eax

			lea		esi, [esi+8]
			lea		edi, [edi+16]
			sub		ecx, 8
			jg		_r8bn_d_loop
		}
		pDst += pitch;
		__asm {
			mov		esi, pScn
			mov		edi, pDst
			mov		ecx, width
			mov		edx, 0x40404040
_r8bn_d_loop2:
			mov		al, [esi+1]
			mov		ah, al
			shl		eax, 16
			mov		al, [esi+0]
			mov		ah, al
			or		eax, edx
			mov		[edi+ 0], eax

			mov		al, [esi+3]
			mov		ah, al
			shl		eax, 16
			mov		al, [esi+2]
			mov		ah, al
			or		eax, edx
			mov		[edi+ 4], eax

			mov		al, [esi+5]
			mov		ah, al
			shl		eax, 16
			mov		al, [esi+4]
			mov		ah, al
			or		eax, edx
			mov		[edi+ 8], eax

			mov		al, [esi+7]
			mov		ah, al
			shl		eax, 16
			mov		al, [esi+6]
			mov		ah, al
			or		eax, edx
			mov		[edi+12], eax

			lea		esi, [esi+8]
			lea		edi, [edi+16]
			sub		ecx, 8
			jg		_r8bn_d_loop2
		}
		pScn += RENDER_WIDTH;
		pDst += pitch;
	}
	} else {
	QWORD	mask = 0x4040404040404040;

	for( INT i = 0; i < SCREEN_HEIGHT; i++ ) {
		__asm {
			mov		esi, pScn
			mov		edi, pDst
			mov		ecx, width
			movq		mm7, mask
_r8bn_d_loop3:
			movd		mm0, [esi+0]
			movd		mm2, [esi+4]
			movq		mm1, mm0
			movq		mm3, mm2
			punpcklbw	mm0, mm1
			punpcklbw	mm2, mm3
			por		mm0, mm7
			por		mm2, mm7
			movq		[edi+ 0], mm0
			movq		[edi+ 8], mm2

			lea		esi, [esi+8]
			lea		edi, [edi+16]
			sub		ecx, 8
			jg		_r8bn_d_loop3
		}
		pDst += pitch;
		__asm {
			mov		esi, pScn
			mov		edi, pDst
			mov		ecx, width
			movq		mm7, mask
_r8bn_d_loop4:
			movd		mm0, [esi+0]
			movd		mm2, [esi+4]
			movq		mm1, mm0
			movq		mm3, mm2
			punpcklbw	mm0, mm1
			punpcklbw	mm2, mm3
			por		mm0, mm7
			por		mm2, mm7
			movq		[edi+ 0], mm0
			movq		[edi+ 8], mm2

			lea		esi, [esi+8]
			lea		edi, [edi+16]
			sub		ecx, 8
			jg		_r8bn_d_loop4
		}
		pScn += RENDER_WIDTH;
		pDst += pitch;
	}
	__asm {
		emms
	}
	}
}

//
// 8bit Double Scanline
//
void	CDirectDraw::Render8bpp_DoubleScanline( LPBYTE lpRdr, LPBYTE lpDlt, DDSURFACEDESC2& ddsd, BOOL bForceWrite )
{
	LPBYTE	pScn = lpRdr;
	LPBYTE	pDst = (LPBYTE)ddsd.lpSurface;
	DWORD	width = SCREEN_WIDTH;
	DWORD	pitch = ddsd.lPitch;

	if( !IsMMX() ) {
	for( INT i = 0; i < SCREEN_HEIGHT; i++ ) {
		__asm {
			mov		esi, pScn
			mov		edi, pDst
			mov		ecx, width
			mov		edx, 0x40404040
_r8bs_d_loop:
			mov		al, [esi+1]
			mov		ah, al
			shl		eax, 16
			mov		al, [esi+0]
			mov		ah, al
			or		eax, edx
			mov		[edi+ 0], eax

			mov		al, [esi+3]
			mov		ah, al
			shl		eax, 16
			mov		al, [esi+2]
			mov		ah, al
			or		eax, edx
			mov		[edi+ 4], eax

			mov		al, [esi+5]
			mov		ah, al
			shl		eax, 16
			mov		al, [esi+4]
			mov		ah, al
			or		eax, edx
			mov		[edi+ 8], eax

			mov		al, [esi+7]
			mov		ah, al
			shl		eax, 16
			mov		al, [esi+6]
			mov		ah, al
			or		eax, edx
			mov		[edi+12], eax

			lea		esi, [esi+8]
			lea		edi, [edi+16]
			sub		ecx, 8
			jg		_r8bs_d_loop
		}
		pDst += pitch;
		__asm {
			mov		esi, pScn
			mov		edi, pDst
			mov		ecx, width
			mov		edx, 0x80808080
_r8bs_d_loop2:
			mov		al, [esi+1]
			mov		ah, al
			shl		eax, 16
			mov		al, [esi+0]
			mov		ah, al
			or		eax, edx
			mov		[edi+ 0], eax

			mov		al, [esi+3]
			mov		ah, al
			shl		eax, 16
			mov		al, [esi+2]
			mov		ah, al
			or		eax, edx
			mov		[edi+ 4], eax

			mov		al, [esi+5]
			mov		ah, al
			shl		eax, 16
			mov		al, [esi+4]
			mov		ah, al
			or		eax, edx
			mov		[edi+ 8], eax

			mov		al, [esi+7]
			mov		ah, al
			shl		eax, 16
			mov		al, [esi+6]
			mov		ah, al
			or		eax, edx
			mov		[edi+12], eax

			lea		esi, [esi+8]
			lea		edi, [edi+16]
			sub		ecx, 8
			jg		_r8bs_d_loop2
		}
		pScn += RENDER_WIDTH;
		pDst += pitch;
	}
	} else {
	QWORD	maskn = 0x4040404040404040;
	QWORD	masks = 0x8080808080808080;

	for( INT i = 0; i < SCREEN_HEIGHT; i++ ) {
		__asm {
			mov		esi, pScn
			mov		edi, pDst
			mov		ecx, width
			movq		mm7, maskn
_r8bs_d_loop3:
			movd		mm0, [esi+0]
			movd		mm2, [esi+4]
			movq		mm1, mm0
			movq		mm3, mm2
			punpcklbw	mm0, mm1
			punpcklbw	mm2, mm3
			por		mm0, mm7
			por		mm2, mm7
			movq		[edi+ 0], mm0
			movq		[edi+ 8], mm2

			lea		esi, [esi+8]
			lea		edi, [edi+16]
			sub		ecx, 8
			jg		_r8bs_d_loop3
		}
		pDst += pitch;
		__asm {
			mov		esi, pScn
			mov		edi, pDst
			mov		ecx, width
			movq		mm7, masks
_r8bs_d_loop4:
			movd		mm0, [esi+0]
			movd		mm2, [esi+4]
			movq		mm1, mm0
			movq		mm3, mm2
			punpcklbw	mm0, mm1
			punpcklbw	mm2, mm3
			por		mm0, mm7
			por		mm2, mm7
			movq		[edi+ 0], mm0
			movq		[edi+ 8], mm2

			lea		esi, [esi+8]
			lea		edi, [edi+16]
			sub		ecx, 8
			jg		_r8bs_d_loop4
		}
		pScn += RENDER_WIDTH;
		pDst += pitch;
	}
	__asm {
		emms
	}
	}
}
💿 文件大小 618 K
👤 上传用户 kyzgq
📂 所属分类游戏
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#VirtuaNes #085 #模拟 #源码
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