Source code of Windows XP (NT5)
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#include "precomp.h"
//
// CM.C
// Cursor Manager, display driver side
//
// Copyright(c) Microsoft 1997-
//
//
//
// CM_DDProcessRequest() - see cm.h
//
//
ULONG CM_DDProcessRequest
(
SURFOBJ* pso,
UINT cjIn,
void * pvIn,
UINT cjOut,
void * pvOut
)
{
BOOL rc;
LPOSI_ESCAPE_HEADER pHeader;
LPOSI_PDEV ppDev = (LPOSI_PDEV)pso->dhpdev;
DebugEntry(CM_DDProcessRequest);
if ((cjIn != sizeof(CM_DRV_XFORM_INFO)) ||
(cjOut != sizeof(CM_DRV_XFORM_INFO)))
{
ERROR_OUT(("CM_DDProcessRequest: Invalid sizes %d, %d for CM_ESC", cjIn, cjOut));
rc = FALSE;
DC_QUIT;
}
//
// Get the request number.
//
pHeader = pvIn;
switch (pHeader->escapeFn)
{
case CM_ESC_XFORM:
{
ASSERT(cjIn == sizeof(CM_DRV_XFORM_INFO));
ASSERT(cjOut == sizeof(CM_DRV_XFORM_INFO));
((LPCM_DRV_XFORM_INFO)pvOut)->result =
CMDDSetTransform(ppDev, (LPCM_DRV_XFORM_INFO)pvIn);
rc = TRUE;
break;
}
break;
default:
{
ERROR_OUT(("Unrecognised CM_ escape"));
rc = FALSE;
}
break;
}
DC_EXIT_POINT:
DebugExitDWORD(CM_DDProcessRequest, rc);
return((ULONG)rc);
}
// Name: CM_DDInit
//
// Purpose: Allocate a working surface for colour cursors
//
// Returns: TRUE/FALSE
//
// Params: IN ppDev - surface information
//
BOOL CM_DDInit(LPOSI_PDEV ppDev)
{
SIZEL bitmapSize;
BOOL rc = FALSE;
DebugEntry(CM_DDInit);
ASSERT(!g_cmWorkBitmap);
//
// Allocate the work bitmap, at the local device resolution. Note that
// we create it "top down" rather than the default of "bottom up" to
// simplify copying data from the bitmap (we don't have to work out
// offsets into the data - we can copy from the beginning).
//
bitmapSize.cx = CM_MAX_CURSOR_WIDTH;
bitmapSize.cy = CM_MAX_CURSOR_HEIGHT;
g_cmWorkBitmap = EngCreateBitmap(bitmapSize,
BYTES_IN_BITMAP(bitmapSize.cx, 1, ppDev->cBitsPerPel),
ppDev->iBitmapFormat, BMF_TOPDOWN, NULL);
if (!g_cmWorkBitmap)
{
ERROR_OUT(( "Failed to create work bitmap"));
DC_QUIT;
}
rc = TRUE;
DC_EXIT_POINT:
DebugExitBOOL(CM_DDInit, rc);
return(rc);
}
//
//
// CM_DDTerm - see cm.h
//
//
void CM_DDTerm(void)
{
DebugEntry(CM_DDTerm);
//
// Destroy the bitmap. Despite its name, EngDeleteSurface is the
// correct function to do this.
//
if (g_cmWorkBitmap)
{
if (!EngDeleteSurface((HSURF)g_cmWorkBitmap))
{
ERROR_OUT(( "Failed to delete work bitmap"));
}
else
{
TRACE_OUT(( "Deleted work bitmap"));
}
g_cmWorkBitmap = NULL;
}
DebugExitVOID(CM_DDTerm);
}
//
// CM_DDViewing()
//
void CM_DDViewing
(
SURFOBJ * pso,
BOOL fViewers
)
{
DebugEntry(CM_DDViewing);
if (fViewers)
{
//
// Jiggle the cursor so we get the current image.
//
EngSetPointerTag(((LPOSI_PDEV)pso->dhpdev)->hdevEng, NULL, NULL, NULL, 0);
}
DebugExitVOID(CM_DDViewing);
}
//
//
// DrvSetPointerShape - see winddi.h
//
//
ULONG DrvSetPointerShape(SURFOBJ *pso,
SURFOBJ *psoMask,
SURFOBJ *psoColor,
XLATEOBJ *pxlo,
LONG xHot,
LONG yHot,
LONG x,
LONG y,
RECTL *prcl,
FLONG fl)
{
ULONG rc = SPS_ACCEPT_NOEXCLUDE;
SURFOBJ * pWorkSurf = NULL;
LPOSI_PDEV ppDev = (LPOSI_PDEV)pso->dhpdev;
BOOL writingSHM = FALSE;
LPCM_SHAPE_DATA pCursorShapeData;
RECTL destRectl;
POINTL sourcePt;
int ii;
LONG lineLen;
LPBYTE srcPtr;
LPBYTE dstPtr;
LPCM_FAST_DATA lpcmShared;
DebugEntry(DrvSetPointerShape);
//
// Returning SPS_ACCEPT_NOEXCLUDE means we can ignore prcl.
//
//
// Only process the change if we are hosting. (Hosting implies being
// initialized).
//
if (!g_oeViewers)
{
DC_QUIT;
}
//
// Get access to the shared memory.
//
lpcmShared = CM_SHM_START_WRITING;
writingSHM = TRUE;
//
// First of all, let's trace out some useful information.
//
TRACE_OUT(( "pso %#hlx psoMask %#hlx psoColor %#hlx pxlo %#hlx",
pso, psoMask, psoColor, pxlo));
TRACE_OUT(( "hot spot (%d, %d) x, y (%d, %d)", xHot, yHot, x, y));
TRACE_OUT(( "Flags %#hlx", fl));
//
// Set up a local pointer to the cursor shape data.
//
pCursorShapeData = &lpcmShared->cmCursorShapeData;
if (psoMask == NULL)
{
//
// This is a transparent cursor. Send a NULL cursor. Note that
// this is not the same as hiding the cursor using DrvMovePointer -
// as in this case the cursor cannot be unhidden unless
// DrvSetPointerShape is called again.
//
TRACE_OUT(( "Transparent Cursor"));
CM_SET_NULL_CURSOR(pCursorShapeData);
g_asSharedMemory->cmCursorHidden = FALSE;
lpcmShared->cmCursorStamp = g_cmNextCursorStamp++;
DC_QUIT;
}
//
// We've been passed a system cursor. Fill in the header for our local
// cursor. We can get the hot spot position and cursor size and width
// easily.
//
pCursorShapeData->hdr.ptHotSpot.x = xHot;
pCursorShapeData->hdr.ptHotSpot.y = yHot;
TRACE_OUT(( "Pointer mask is %#hlx by %#hlx pixels (lDelta: %#hlx)",
psoMask->sizlBitmap.cx,
psoMask->sizlBitmap.cy,
psoMask->lDelta));
pCursorShapeData->hdr.cx = (WORD)psoMask->sizlBitmap.cx;
pCursorShapeData->hdr.cy = (WORD)psoMask->sizlBitmap.cy / 2;
//
// Check cursor size
//
if ((pCursorShapeData->hdr.cx > CM_MAX_CURSOR_WIDTH) ||
(pCursorShapeData->hdr.cy > CM_MAX_CURSOR_HEIGHT))
{
ERROR_OUT(( "Cursor too big! %d %d",
psoMask->sizlBitmap.cx, psoMask->sizlBitmap.cy));
DC_QUIT;
}
//
// lDelta may be negative for an inverted cursor (which is what we get
// from DC-Share).
//
lineLen = abs(psoMask->lDelta);
//
// At this point we need to know if we are dealing with a color cursor.
//
if (NULL == psoColor)
{
TRACE_OUT(( "Monochrome pointer"));
pCursorShapeData->hdr.cPlanes = 1;
pCursorShapeData->hdr.cBitsPerPel = 1;
pCursorShapeData->hdr.cbRowWidth = (WORD)lineLen;
//
// Copy the 1bpp AND mask and cursor shape (XOR mask) across.
//
TRACE_OUT(( "Copying AND mask across from %#hlx (size: %#hlx)",
psoMask->pvBits,
psoMask->cjBits));
dstPtr = pCursorShapeData->data;
srcPtr = (LPBYTE) psoMask->pvScan0;
for (ii = pCursorShapeData->hdr.cy * 2; ii > 0 ; ii--)
{
memcpy(dstPtr, srcPtr, lineLen);
srcPtr += psoMask->lDelta;
dstPtr += lineLen;
}
//
// Copy black-and-white palette colors
//
TRACE_OUT(( "Copy B+W palette"));
lpcmShared->colorTable[0].peRed = 0;
lpcmShared->colorTable[0].peGreen = 0;
lpcmShared->colorTable[0].peBlue = 0;
lpcmShared->colorTable[0].peFlags = 0;
lpcmShared->colorTable[1].peRed = 255;
lpcmShared->colorTable[1].peGreen = 255;
lpcmShared->colorTable[1].peBlue = 255;
lpcmShared->colorTable[1].peFlags = 0;
//
// That's all we need to do in this case.
//
}
else
{
TRACE_OUT(( "Color pointer - mask of %#hlx by %#hlx (lDelta: %#hlx)",
psoColor->sizlBitmap.cx,
psoColor->sizlBitmap.cy,
psoColor->lDelta));
//
// Note: row width used to calculate AND mask size - and is thus
// for the 1bpp mask.
//
pCursorShapeData->hdr.cbRowWidth = (WORD)lineLen;
pCursorShapeData->hdr.cPlanes = 1;
//
// Note: data at device bpp.
//
TRACE_OUT(( "BPP is %d", pCursorShapeData->hdr.cBitsPerPel));
pCursorShapeData->hdr.cBitsPerPel = (BYTE)ppDev->cBitsPerPel;
//
// Lock the work bitmap to get a surface to pass to EngBitBlt.
//
pWorkSurf = EngLockSurface((HSURF)g_cmWorkBitmap);
if (NULL == pWorkSurf)
{
ERROR_OUT(( "Failed to lock work surface"));
DC_QUIT;
}
TRACE_OUT(( "Locked surface"));
//
// Perform the Blt to our work bitmap so that we can get the bits
// at the native bpp.
//
destRectl.top = 0;
destRectl.left = 0;
destRectl.right = psoColor->sizlBitmap.cx;
destRectl.bottom = psoColor->sizlBitmap.cy;
sourcePt.x = 0;
sourcePt.y = 0;
if (!EngBitBlt(pWorkSurf,
psoColor,
NULL, // mask surface
NULL, // clip object
pxlo, // XLATE object
&destRectl,
&sourcePt,
NULL, // mask origin
NULL, // brush
NULL, // brush origin
0xcccc)) // SRCCPY
{
ERROR_OUT(( "Failed to Blt to work bitmap"));
DC_QUIT;
}
TRACE_OUT(( "Got the bits at native format into the work bitmap"));
//
// Now copy the bits we want from this work bitmap into the
// DCCURSORSHAPE shared memory.
// First copy the AND bits (but ignore the redundant 1bpp XOR bits)
//
TRACE_OUT(( "Copy %d bytes of 1bpp AND mask", psoMask->cjBits/2));
dstPtr = pCursorShapeData->data;
srcPtr = (LPBYTE) psoMask->pvScan0;
for (ii = pCursorShapeData->hdr.cy; ii > 0 ; ii--)
{
memcpy(dstPtr, srcPtr, lineLen);
srcPtr += psoMask->lDelta;
dstPtr += lineLen;
}
TRACE_OUT(( "Copy %d bytes of color", pWorkSurf->cjBits));
memcpy(&(pCursorShapeData->data[psoMask->cjBits / 2]),
pWorkSurf->pvBits,
pWorkSurf->cjBits);
//
// Now work out the palette and copy into shared memory
//
if (pCursorShapeData->hdr.cBitsPerPel > 8)
{
//
// Need the bitmasks.
//
TRACE_OUT(( "Copy bitmasks"));
lpcmShared->bitmasks[0] = ppDev->flRed;
lpcmShared->bitmasks[1] = ppDev->flGreen;
lpcmShared->bitmasks[2] = ppDev->flBlue;
}
else
{
//
// Need a palette.
//
TRACE_OUT(( "Copy %d palette bytes",
COLORS_FOR_BPP(ppDev->cBitsPerPel) * sizeof(PALETTEENTRY)));
memcpy(lpcmShared->colorTable,
ppDev->pPal,
COLORS_FOR_BPP(ppDev->cBitsPerPel) *
sizeof(PALETTEENTRY));
}
}
//
// Set the cursor stamp, and the cursor hidden state.
//
lpcmShared->cmCursorStamp = g_cmNextCursorStamp++;
g_asSharedMemory->cmCursorHidden = FALSE;
DC_EXIT_POINT:
//
// Free access to the shared memory if we got it earlier.
//
if (writingSHM)
{
CM_SHM_STOP_WRITING;
}
if (pWorkSurf != NULL)
{
//
// Unlock the work bitmap surface.
//
EngUnlockSurface(pWorkSurf);
}
DebugExitDWORD(DrvSetPointerShape, rc);
return(rc);
} // DrvSetPointerShape
//
// DrvMovePointer - see NT DDK documentation.
// We only look at this in order to check for hidden cursors - normal
// pointer moves are ignored.
//
VOID DrvMovePointer(SURFOBJ *pso,
LONG x,
LONG y,
RECTL *prcl)
{
LPOSI_PDEV ppdev = (LPOSI_PDEV) pso->dhpdev;
DebugEntry(DrvMovePointer);
//
// We don't use the exclusion rectangle because we only support
// hardware Pointers. If we were doing our own Pointer simulations we
// would want to update prcl so that the engine would call us to
// exclude our pointer before drawing to the pixels in prcl.
//
//
// Only process the mouse move if we are hosting. (Hosting implies
// being initialized).
//
if (!g_oeViewers)
{
DC_QUIT;
}
if (x == -1)
{
if (!g_cmCursorHidden)
{
//
// Pointer is hidden.
//
TRACE_OUT(("Hide the cursor"));
//
// Set the 'hide cursor' flag.
//
CM_SHM_START_WRITING;
g_asSharedMemory->cmCursorHidden = TRUE;
CM_SHM_STOP_WRITING;
//
// Update our fast-path variable.
//
g_cmCursorHidden = TRUE;
}
}
else
{
if (g_cmCursorHidden)
{
//
// The pointer is unhidden
//
TRACE_OUT(("Show the cursor"));
CM_SHM_START_WRITING;
g_asSharedMemory->cmCursorHidden = FALSE;
CM_SHM_STOP_WRITING;
//
// Update our fast-path variable.
//
g_cmCursorHidden = FALSE;
}
}
DC_EXIT_POINT:
DebugExitVOID(DrvMovePointer);
}
// Name: CMDDSetTransform
//
// Purpose: Set up a cursor transform
//
// Returns: TRUE/FALSE
//
// Params: IN ppDev - device info
// IN pXformInfo - data passed in to DrvEscape
//
BOOL CMDDSetTransform(LPOSI_PDEV ppDev, LPCM_DRV_XFORM_INFO pXformInfo)
{
BOOL rc = FALSE;
LPBYTE pAND = pXformInfo->pANDMask;
SIZEL bitmapSize;
HBITMAP andBitmap;
SURFOBJ * pANDSurf;
DebugEntry(CMDDSetTransform);
if (pAND == NULL)
{
//
// Reset the transform
//
TRACE_OUT(( "Clear transform"));
EngSetPointerTag(ppDev->hdevEng, NULL, NULL, NULL, 0);
rc = TRUE;
DC_QUIT;
}
//
// Transforms are always monochrome
//
//
// Create a 1bpp bitmap, double-height, with the AND bits followed by
// the XOR bits. We are given a top-down DIB, so we need to create
// a top-down bitmap.
//
bitmapSize.cx = pXformInfo->width;
bitmapSize.cy = pXformInfo->height * 2;
andBitmap = EngCreateBitmap(bitmapSize, BYTES_IN_BITMAP(bitmapSize.cx, 1, 1),
BMF_1BPP, BMF_TOPDOWN, NULL);
pANDSurf = EngLockSurface((HSURF)andBitmap);
if (pANDSurf == NULL)
{
ERROR_OUT(( "Failed to lock work surface"));
DC_QUIT;
}
//
// Copy the bits
//
memcpy(pANDSurf->pvBits, pAND, pANDSurf->cjBits);
TRACE_OUT(( "Set the tag"));
EngSetPointerTag(ppDev->hdevEng, pANDSurf, NULL, NULL, 0);
EngUnlockSurface(pANDSurf);
EngDeleteSurface((HSURF)andBitmap);
rc = TRUE;
DC_EXIT_POINT:
DebugExitBOOL(CMDDSetTransform, rc);
return(rc);
} // CMDDSetTransform