241 lines
7.7 KiB
C
241 lines
7.7 KiB
C
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/******************************Module*Header*******************************\
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*
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* *******************
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* * GDI SAMPLE CODE *
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* *******************
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*
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* Module Name: misc.c
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*
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* Miscellaneous common routines.
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*
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* Copyright (c) 1992-1998 Microsoft Corporation
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*
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\**************************************************************************/
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#include "precomp.h"
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/******************************Public*Table********************************\
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* BYTE gaulHwMixFromRop2[]
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*
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* Table to convert from a Source and Destination Rop2 to the hardware's
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* mix.
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\**************************************************************************/
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ULONG gaulHwMixFromRop2[] = {
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LOGICAL_0, // 00 -- 0 BLACKNESS
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NOT_SCREEN_AND_NOT_NEW, // 11 -- DSon NOTSRCERASE
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SCREEN_AND_NOT_NEW, // 22 -- DSna
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NOT_NEW, // 33 -- Sn NOSRCCOPY
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NOT_SCREEN_AND_NEW, // 44 -- SDna SRCERASE
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NOT_SCREEN, // 55 -- Dn DSTINVERT
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SCREEN_XOR_NEW, // 66 -- DSx SRCINVERT
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NOT_SCREEN_OR_NOT_NEW, // 77 -- DSan
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SCREEN_AND_NEW, // 88 -- DSa SRCAND
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NOT_SCREEN_XOR_NEW, // 99 -- DSxn
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LEAVE_ALONE, // AA -- D
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SCREEN_OR_NOT_NEW, // BB -- DSno MERGEPAINT
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OVERPAINT, // CC -- S SRCCOPY
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NOT_SCREEN_OR_NEW, // DD -- SDno
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SCREEN_OR_NEW, // EE -- DSo SRCPAINT
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LOGICAL_1 // FF -- 1 WHITENESS
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};
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/******************************Public*Table********************************\
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* BYTE gajHwMixFromMix[]
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*
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* Table to convert from a GDI mix value to the hardware's mix.
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*
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* Ordered so that the mix may be calculated from gajHwMixFromMix[mix & 0xf]
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* or gajHwMixFromMix[mix & 0xff].
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\**************************************************************************/
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BYTE gajHwMixFromMix[] = {
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LOGICAL_1, // 0 -- 1
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LOGICAL_0, // 1 -- 0
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NOT_SCREEN_AND_NOT_NEW, // 2 -- DPon
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SCREEN_AND_NOT_NEW, // 3 -- DPna
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NOT_NEW, // 4 -- Pn
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NOT_SCREEN_AND_NEW, // 5 -- PDna
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NOT_SCREEN, // 6 -- Dn
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SCREEN_XOR_NEW, // 7 -- DPx
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NOT_SCREEN_OR_NOT_NEW, // 8 -- DPan
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SCREEN_AND_NEW, // 9 -- DPa
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NOT_SCREEN_XOR_NEW, // 10 -- DPxn
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LEAVE_ALONE, // 11 -- D
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SCREEN_OR_NOT_NEW, // 12 -- DPno
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OVERPAINT, // 13 -- P
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NOT_SCREEN_OR_NEW, // 14 -- PDno
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SCREEN_OR_NEW, // 15 -- DPo
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LOGICAL_1 // 16 -- 1
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};
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/******************************Public*Data*********************************\
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* MIX translation table
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*
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* Translates a mix 1-16, into an old style Rop 0-255.
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*
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\**************************************************************************/
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BYTE gaRop3FromMix[] =
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{
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0xFF, // R2_WHITE - Allow rop = gaRop3FromMix[mix & 0x0F]
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0x00, // R2_BLACK
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0x05, // R2_NOTMERGEPEN
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0x0A, // R2_MASKNOTPEN
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0x0F, // R2_NOTCOPYPEN
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0x50, // R2_MASKPENNOT
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0x55, // R2_NOT
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0x5A, // R2_XORPEN
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0x5F, // R2_NOTMASKPEN
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0xA0, // R2_MASKPEN
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0xA5, // R2_NOTXORPEN
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0xAA, // R2_NOP
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0xAF, // R2_MERGENOTPEN
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0xF0, // R2_COPYPEN
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0xF5, // R2_MERGEPENNOT
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0xFA, // R2_MERGEPEN
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0xFF // R2_WHITE - Allow rop = gaRop3FromMix[mix & 0xFF]
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};
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/******************************Public*Routine******************************\
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* BOOL bIntersect
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*
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* If 'prcl1' and 'prcl2' intersect, has a return value of TRUE and returns
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* the intersection in 'prclResult'. If they don't intersect, has a return
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* value of FALSE, and 'prclResult' is undefined.
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*
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\**************************************************************************/
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BOOL bIntersect(
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RECTL* prcl1,
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RECTL* prcl2,
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RECTL* prclResult)
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{
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prclResult->left = max(prcl1->left, prcl2->left);
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prclResult->right = min(prcl1->right, prcl2->right);
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if (prclResult->left < prclResult->right)
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{
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prclResult->top = max(prcl1->top, prcl2->top);
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prclResult->bottom = min(prcl1->bottom, prcl2->bottom);
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if (prclResult->top < prclResult->bottom)
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{
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return(TRUE);
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}
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}
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return(FALSE);
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}
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/******************************Public*Routine******************************\
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* LONG cIntersect
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*
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* This routine takes a list of rectangles from 'prclIn' and clips them
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* in-place to the rectangle 'prclClip'. The input rectangles don't
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* have to intersect 'prclClip'; the return value will reflect the
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* number of input rectangles that did intersect, and the intersecting
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* rectangles will be densely packed.
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*
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\**************************************************************************/
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LONG cIntersect(
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RECTL* prclClip,
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RECTL* prclIn, // List of rectangles
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LONG c) // Can be zero
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{
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LONG cIntersections;
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RECTL* prclOut;
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cIntersections = 0;
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prclOut = prclIn;
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for (; c != 0; prclIn++, c--)
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{
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prclOut->left = max(prclIn->left, prclClip->left);
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prclOut->right = min(prclIn->right, prclClip->right);
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if (prclOut->left < prclOut->right)
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{
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prclOut->top = max(prclIn->top, prclClip->top);
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prclOut->bottom = min(prclIn->bottom, prclClip->bottom);
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if (prclOut->top < prclOut->bottom)
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{
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prclOut++;
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cIntersections++;
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}
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}
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}
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return(cIntersections);
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}
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/******************************Public*Routine******************************\
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* VOID vResetClipping
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\**************************************************************************/
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VOID vResetClipping(
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PDEV* ppdev)
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{
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IO_FIFO_WAIT(ppdev, 4);
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IO_ABS_SCISSORS_L(ppdev, 0);
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IO_ABS_SCISSORS_T(ppdev, 0);
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IO_ABS_SCISSORS_R(ppdev, ppdev->cxMemory - 1);
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IO_ABS_SCISSORS_B(ppdev, ppdev->cyMemory - 1);
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}
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/******************************Public*Routine******************************\
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* VOID vSetClipping
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\**************************************************************************/
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VOID vSetClipping(
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PDEV* ppdev,
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RECTL* prclClip) // In relative coordinates
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{
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LONG xOffset;
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LONG yOffset;
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ASSERTDD(prclClip->left + ppdev->xOffset >= 0,
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"Can't have a negative left!");
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ASSERTDD(prclClip->top + ppdev->yOffset >= 0,
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"Can't have a negative top!");
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IO_FIFO_WAIT(ppdev, 4);
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xOffset = ppdev->xOffset;
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IO_ABS_SCISSORS_L(ppdev, prclClip->left + xOffset);
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IO_ABS_SCISSORS_R(ppdev, prclClip->right - 1 + xOffset);
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yOffset = ppdev->yOffset;
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IO_ABS_SCISSORS_T(ppdev, prclClip->top + yOffset);
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IO_ABS_SCISSORS_B(ppdev, prclClip->bottom - 1 + yOffset);
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}
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/******************************Public*Routine******************************\
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* VOID DrvSynchronize
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*
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* This routine is called by GDI to synchronize on the accelerator before
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* it draws directly to the driver's surface. This function must be hooked
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* by the driver when:
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*
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* 1. The primary surface is a GDI-managed surface, which simply means
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* that GDI can directly draw on the primary surface. This happens
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* when DrvEnableSurface returns a handle created by EngCreateBitmap
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* instead of EngCreateDeviceSurface.
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*
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* 2. A device-bitmap is made into a GDI-managed surface by calling
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* EngModifySurface with a pointer directly to the bits.
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*
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\**************************************************************************/
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VOID DrvSynchronize(
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IN DHPDEV dhpdev,
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IN RECTL *prcl)
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{
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PDEV *ppdev = (PDEV *)dhpdev;
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IO_GP_WAIT(ppdev);
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}
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