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139 lines
5.5 KiB
139 lines
5.5 KiB
/******************************Module*Header*******************************\
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* Module Name: lines.h
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*
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* Line drawing constants and structures.
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*
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* NOTE: This file mirrors LINES.INC. Changes here must be reflected in
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* the .inc file!
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*
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* Created: 30-Mar-1992
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* Author: Andrew Milton [w-andym]
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*
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* Copyright (c) 1992 Microsoft Corporation
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\**************************************************************************/
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typedef LONG STYLEPOS;
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#define STYLE_MAX_COUNT 16 // Maximum number of style array entries
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#define STYLE_MAX_VALUE 0x3fffL // Maximum for of a style array element
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#define RUN_MAX 20 // Size of our complex clip runs buffer
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#define STRIP_MAX 100 // Size of our strip buffer
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#define STYLE_DENSITY 3 // Each style unit is 3 pixels long
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// For the ROP table:
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#define MIX_XOR_OFFSET 8
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#define AND_ZERO 0L
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#define AND_PEN 1L
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#define AND_NOTPEN 2L
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#define AND_ONE 3L
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#define XOR_ZERO (AND_ZERO << MIX_XOR_OFFSET)
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#define XOR_PEN (AND_PEN << MIX_XOR_OFFSET)
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#define XOR_NOTPEN (AND_NOTPEN << MIX_XOR_OFFSET)
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#define XOR_ONE (AND_ONE << MIX_XOR_OFFSET)
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// Flip and round flags (see lines.inc for a description):
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#define FL_H_ROUND_DOWN 0x00000080L // .... .... 1... ....
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#define FL_V_ROUND_DOWN 0x00008000L // 1... .... .... ....
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#define FL_FLIP_D 0x00000005L // .... .... .... .1.1
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#define FL_FLIP_V 0x00000008L // .... .... .... 1...
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#define FL_FLIP_SLOPE_ONE 0x00000010L // .... .... ...1 ....
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#define FL_FLIP_HALF 0x00000002L // .... .... .... ..1.
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#define FL_FLIP_H 0x00000200L // .... ..1. .... ....
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#define FL_ROUND_MASK 0x0000001CL // .... .... ...1 11..
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#define FL_ROUND_SHIFT 2
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#define FL_RECTLCLIP_MASK 0x0000000CL // .... .... .... 11..
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#define FL_RECTLCLIP_SHIFT 2
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#define FL_STRIP_MASK 0x00000003L // .... .... .... ..11
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#define FL_STRIP_SHIFT 0
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#define FL_SIMPLE_CLIP 0x00000020 // .... .... ..1. ....
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#define FL_COMPLEX_CLIP 0x00000040 // .... .... .1.. ....
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#define FL_CLIP (FL_SIMPLE_CLIP | FL_COMPLEX_CLIP)
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#define FL_ARBITRARYSTYLED 0x00000400L // .... .1.. .... ....
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#define FL_SET 0x00000800L // .... 1... .... ....
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#define FL_STYLED (FL_ARBITRARYSTYLED)
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#define FL_STRIP_ARRAY_MASK 0x00000C00L
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#define FL_STRIP_ARRAY_SHIFT 10
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// Simpler flag bits in high byte:
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#define FL_DONT_DO_HALF_FLIP 0x00002000L // ..1. .... .... ....
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#define FL_PHYSICAL_DEVICE 0x00004000L // .1.. .... .... ....
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// Miscellaneous DDA defines:
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#define LROUND(x, flRoundDown) (((x) + F/2 - ((flRoundDown) > 0)) >> 4)
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#define F 16
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#define FLOG2 4
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#define LFLOOR(x) ((x) >> 4)
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#define FXFRAC(x) ((x) & (F - 1))
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struct _STRIP;
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struct _LINESTATE;
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typedef VOID (*PFNSTRIP)(struct _STRIP*, struct _LINESTATE*, LONG*);
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typedef struct _STRIP {
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// Updated by strip drawers:
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BYTE* pjScreen; // Points to the first pixel of the line
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BYTE bIsGap; // Are we working on a gap in the style?
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BYTE jFiller2[3]; // bIsGap sometimes treated as a ULONG
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STYLEPOS* psp; // Pointer to current style entry
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STYLEPOS spRemaining; // To go in current style
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// Not modified by strip drawers:
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LONG lNextScan; // Signed increment to next scan
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LONG* plStripEnd; // Points one element past last strip
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LONG flFlips; // Indicates if line goes up or down
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STYLEPOS* pspStart; // Pointer to start of style array
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STYLEPOS* pspEnd; // Pointer to end of style array
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ULONG xyDensity; // Density of style
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ULONG chAndXor; // Lines colors (need 2 for doing ROPs)
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// We leave room for a couple of extra dwords at the end of the strips
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// array that can be used by the strip drawers:
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LONG alStrips[STRIP_MAX + 2]; // Array of strips
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} STRIP;
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typedef struct _LINESTATE {
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ULONG chAndXor; // Line colors (need 2 for doing ROPs)
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STYLEPOS spTotal; // Sum of style array
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STYLEPOS spTotal2; // Twice sum of style array
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STYLEPOS spNext; // Style state at start of next line
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STYLEPOS spComplex; // Style state at start of complex clip line
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STYLEPOS* aspRtoL; // Style array in right-to-left order
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STYLEPOS* aspLtoR; // Style array in left-to-right order
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ULONG xyDensity; // Density of style
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ULONG cStyle; // Size of style array
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ULONG ulStyleMaskLtoR;// Original style mask, left-to-right order
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ULONG ulStyleMaskRtoL;// Original style mask, right-to-left order
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BOOL bStartIsGap; // Determines if first element in style
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// array is for a gap or a dash
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} LINESTATE; /* ls */
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BOOL bLinesSimple(PPDEV, POINTFIX*, POINTFIX*, RUN*, ULONG, LINESTATE*,
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RECTL*, PFNSTRIP*, FLONG);
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BOOL bLines(PPDEV, POINTFIX*, POINTFIX*, RUN*, ULONG,
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LINESTATE*, RECTL*, PFNSTRIP*, FLONG);
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