Leaked source code of windows server 2003
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;----------------------------Module-Header------------------------------;; Module Name: GENLOCAL.BLT;; Parameters and generic local variables for BitBLT.;; Created: In Windows' distant past (c. 1983);; Copyright (c) 1983 - 1987 Microsoft Corporation;; This file contains the parameters passed to BitBLT, as well as local; variables that all of its code expects.;; The prefix "gl_" stands for "generic local". Other prefixes are "cl_"; for "color-related local" and "dl_" for "device-related local".;; This file is part of a set that makes up the Windows BitBLT function; at driver-level.;-----------------------------------------------------------------------;
parmD _PRT_FrameStart ;Get pointer to destination parmD _lpgBrush parmW _PRT_BytesPerScanline parmW _usBrushWidth parmW _PRT_Max_X parmW _PRT_Max_Y parmW _usgPosOff ; dstseng 08/06/92 To get correct Brush Offset parmW SrcxOrg ;Source origin - x coordinate parmW DestyOrg ;Destination origin - y coordinate parmW DestxOrg ;Destination origin - x coordinate parmW DestWarp ;Destination # of DWord per scanline parmW yExt ;y extent of the BLT parmW xExt ;x extent of the BLT parmD lpSrcDev ;--> to source bitmap descriptor parmD lpPBrush ;--> to a physical brush (pattern) parmD Rop ;Raster operation descriptor
; Generic locals (i.e. used by all BitBLT code)
ifdef THIS_IS_DOS_3_STUFFelse; localW ScreenSelectorendif localB gl_phase_h ;Horizontal phase (rotate count) localW gl_pat_row ;Current row for patterns [0..31];mslin localB gl_direction ;Increment/decrement flag
localB local_enable_flag ;Local copy of the enable flag; localB mask_flags ;Number of first fetches needed;;MF_PHASE equ 00000111b;MF_PHASE_POSITIVE equ 00001000b;MF_STEP_RIGHT equ 00010000b;MF_WORD_FETCH equ 00100000b;MF_BIG_PHASE equ 01000000b ; phase > 4;MF_UN_USED equ 10000000b
localB gl_the_flags localB gl_first_fetch ;Number of first fetches needed localB gl_step_direction ;Direction of move (left right) localW gl_start_mask ;Mask for first dest byte localW gl_last_mask ;Mask for last dest byte localW gl_mask_p ;Horizontal phase mask localW gl_inner_loop_count ;# of entire bytes to BLT in innerloop localW gl_operands ;Operand string localW gl_start_fl ;Start of fetch/logic operation localW gl_end_fl ;End of fetch/logic operation localW gl_end_fls ;End of fetch/logic/store operation localD gl_blt_addr ;BLT offset address localW WorkSelector ; selector to use localW cFetchCode ;size of the fetch code alone
localW SrcxOrg ;Source origin - x coordinate localW SrcyOrg ;Source origin - y coordinate localW gl_pattern_ptr ;next fetch byte pattern address localW destOffset localW gl_pat_col ;Current row for patterns [0..3] localW gl_brush_width ;Current brush width in byte
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