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Annotation of ntddk/src/video/displays/vga/i386/display.inc, revision 1.1

1.1     ! root        1: ;---------------------------Module-Header------------------------------;
        !             2: ; Module Name: display.inc
        !             3: ;
        !             4: ; Copyright (c) 1992 Microsoft Corporation
        !             5: ;-----------------------------------------------------------------------;
        !             6: 
        !             7: NUMBER_PLANES   equ     4               ;4 plane format
        !             8: 
        !             9: 
        !            10: 
        !            11: ;      The color structure is how this driver stores its physical
        !            12: ;      colors in memory.  The color consists of four bytes (dword),
        !            13: ;      one byte for each of three planes of color, and a fourth
        !            14: ;      byte which is a combination of one bit from each plane, plus
        !            15: ;      other special information.
        !            16: ;
        !            17: ;      C3Bit will have to be expanded as needed for the fourth plane.
        !            18: 
        !            19: 
        !            20: phys_color     struc
        !            21: pcol_C0        db      ?               ;Plane C0
        !            22: pcol_C1        db      ?               ;Plane C1
        !            23: pcol_C2        db      ?               ;Plane C2
        !            24: pcol_C3        db      ?               ;Plane C3/Monochrome/Special information
        !            25: phys_color     ends
        !            26: 
        !            27: 
        !            28: ;      Definitions for the pcol_C3 byte of the physical color
        !            29: ;
        !            30: ;      Some of these definitions have limitations as to when they
        !            31: ;      are valid.  They are as follows:
        !            32: ;
        !            33: ;      C0_BIT          color device, phys color, solid brushes if SOLID_COLOR
        !            34: ;      C1_BIT          color device, phys color, solid brushes if SOLID_COLOR
        !            35: ;      C2_BIT          color device, phys color, solid brushes if SOLID_COLOR
        !            36: ;      C3_BIT          color device, phys color, solid brushes if SOLID_COLOR
        !            37: ;      MONO_BIT        mono  device, phys color
        !            38: ;      ONES_OR_ZEROS   color device, phys color, solid brushes if SOLID_COLOR
        !            39: ;      GREY_SCALE      color device, dithered solid and hatched brushes
        !            40: ;      SOLID_BRUSH     color device, solid brush qualifier
        !            41: ;
        !            42: ;      There may be brushes where the accelerators could have been set,
        !            43: ;      but wasn't.  That's life.
        !            44: 
        !            45: 
        !            46: SPECIAL        equ     pcol_C3         ;Special information is here
        !            47: C0_BIT         equ     00000001b       ;  C0 color
        !            48: C1_BIT         equ     00000010b       ;  C1 color
        !            49: C2_BIT         equ     00000100b       ;  C2 color
        !            50: C3_BIT         equ     00001000b       ;  C3 color
        !            51: MONO_BIT       equ     00010000b       ;  Monochrome bit
        !            52: ONES_OR_ZEROS  equ     00100000b       ;  Color is really all 1's or all 0's
        !            53: GREY_SCALE     equ     01000000b       ;  Indicates a real grey scale brush
        !            54: SOLID_BRUSH    equ     10000000b       ;  Indicates a solid color brush
        !            55: 
        !            56:         .errnz  (size phys_color) - 4   ;Must be a double word
        !            57: 
        !            58: 
        !            59: 
        !            60: ;      The brush structure is OEM dependant, and can contain whatever
        !            61: ;      information that is needed to realize the given brush.
        !            62: ;
        !            63: ;      For this implementation, the brush will consist of an 8x8
        !            64: ;      pattern for each of the planes, and another 8x8 pattern
        !            65: ;      for monochrome devices and for monochrome to color conversion
        !            66: ;      (for something like a hatched brush, this would contain the
        !            67: ;      monochrome mask used to create the brush).
        !            68: ;
        !            69: ;      The style will also be stored in the brush and is used to
        !            70: ;      catch hollow brushes and exit early.
        !            71: ;
        !            72: ;      A flag specific to the EGA is also stored in the brush.  This
        !            73: ;      flag indicates that the brush is a solid brush and that the
        !            74: ;      color for each plane is a solid color (all 1's or all 0's).
        !            75: ;      Patterns which are solid in each plane can be handle as a
        !            76: ;      special case in Bitblt when the raster op is P or Pn.
        !            77: 
        !            78: 
        !            79: SIZE_PATTERN   equ     8               ;Size of an 8 by 8 pattern in bytes
        !            80: 
        !            81: 
        !            82: oem_brush_def  struc
        !            83: oem_brush_C0    db     SIZE_PATTERN dup (?)    ;C0 plane
        !            84: oem_brush_C1    db     SIZE_PATTERN dup (?)    ;C1 plane
        !            85: oem_brush_C2    db     SIZE_PATTERN dup (?)    ;C2 plane
        !            86: oem_brush_C3    db     SIZE_PATTERN dup (?)    ;C3 plane
        !            87: oem_brush_mono  db     32       dup (?)        ;Mono portion
        !            88: oem_brush_style  dw    0                       ;Style of the brush
        !            89: oem_brush_accel  db    0                       ;Accellerator for solids
        !            90: oem_brush_fg    db     0                       ;current foreground (text) color
        !            91: oem_brush_bg    db     0                       ;current background color
        !            92: oem_brush_rwidth db    0                       ;pre expanded width
        !            93: oem_brush_yshft  db    0                       ;
        !            94: oem_brush_spar2  db    0                       ;just a fill byte for now
        !            95: oem_brush_width         dd     0                       ;Width of brush
        !            96: oem_brush_height dd     0                      ;Height of brush
        !            97: oem_brush_planes db    32       dup (?)        ;Special Plane Masks
        !            98: oem_brush_pmono  dd     0                      ;pointer to mono pattern
        !            99: oem_brush_def  ends                            ;  (same as "Special" above)
        !           100: 
        !           101: ;      Brush styles defined by GDI
        !           102: 
        !           103: BS_SOLID            equ     0
        !           104: BS_HOLLOW           equ     1
        !           105: BS_HATCHED          equ     2
        !           106: BS_PATTERN          equ     3
        !           107: BS_MONO_PATTERN     equ     4
        !           108: BS_COLOR_PATTERN    equ     5

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