/*
* Return the full scan size for a bitmap.
*
* Based on Wine, Utils.c and Windows Graphics Prog pg 595, SDK amvideo.h.
*/
UINT
FASTCALL
DIB_BitmapMaxBitsSize(
PBITMAPINFO Info,
UINT ScanLines)
{
UINT Ret;
if (!Info)
return 0;
if (Info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
{
PBITMAPCOREHEADER Core = (PBITMAPCOREHEADER) Info;
Ret = WIDTH_BYTES_ALIGN32(Core->bcWidth * Core->bcPlanes,
Core->bcBitCount) * ScanLines;
}
else /* assume BITMAPINFOHEADER */
{
if ((Info->bmiHeader.biCompression == BI_RGB) || (Info->bmiHeader.biCompression == BI_BITFIELDS))
{
Ret = WIDTH_BYTES_ALIGN32(
Info->bmiHeader.biWidth * Info->bmiHeader.biPlanes,
Info->bmiHeader.biBitCount) * ScanLines;
}
else
{
Ret = Info->bmiHeader.biSizeImage;
}
}
return Ret;
}
/*
* @implemented
*/
int
WINAPI
GdiGetBitmapBitsSize(
BITMAPINFO *lpbmi)
{
UINT Ret;
if (!lpbmi)
return 0;
if (lpbmi->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
{
PBITMAPCOREHEADER Core = (PBITMAPCOREHEADER) lpbmi;
Ret =
WIDTH_BYTES_ALIGN32(Core->bcWidth * Core->bcPlanes,
Core->bcBitCount) * Core->bcHeight;
}
else /* assume BITMAPINFOHEADER */
{
if (!(lpbmi->bmiHeader.biCompression) || (lpbmi->bmiHeader.biCompression == BI_BITFIELDS))
{
Ret = WIDTH_BYTES_ALIGN32(
lpbmi->bmiHeader.biWidth * lpbmi->bmiHeader.biPlanes,
lpbmi->bmiHeader.biBitCount) * abs(lpbmi->bmiHeader.biHeight);
}
else
{
Ret = lpbmi->bmiHeader.biSizeImage;
}
}
return Ret;
}
/**
* This function is not exported, because it makes no sense for
* The driver to punt back to this function */
BOOL
APIENTRY
EngRealizeBrush(
BRUSHOBJ *pbo,
SURFOBJ *psoDst,
SURFOBJ *psoPattern,
SURFOBJ *psoMask,
XLATEOBJ *pxlo,
ULONG iHatch)
{
EBRUSHOBJ *pebo;
HBITMAP hbmpRealize;
SURFOBJ *psoRealize;
PSURFACE psurfRealize;
POINTL ptlSrc = {0, 0};
RECTL rclDest;
ULONG lWidth;
/* Calculate width in bytes of the realized brush */
lWidth = WIDTH_BYTES_ALIGN32(psoPattern->sizlBitmap.cx,
BitsPerFormat(psoDst->iBitmapFormat));
/* Allocate a bitmap */
hbmpRealize = EngCreateBitmap(psoPattern->sizlBitmap,
lWidth,
psoDst->iBitmapFormat,
BMF_NOZEROINIT,
NULL);
if (!hbmpRealize)
{
return FALSE;
}
/* Lock the bitmap */
psurfRealize = SURFACE_ShareLockSurface(hbmpRealize);
/* Already delete the pattern bitmap (will be kept until dereferenced) */
EngDeleteSurface((HSURF)hbmpRealize);
if (!psurfRealize)
{
return FALSE;
}
/* Copy the bits to the new format bitmap */
rclDest.left = rclDest.top = 0;
rclDest.right = psoPattern->sizlBitmap.cx;
rclDest.bottom = psoPattern->sizlBitmap.cy;
psoRealize = &psurfRealize->SurfObj;
EngCopyBits(psoRealize, psoPattern, NULL, pxlo, &rclDest, &ptlSrc);
pebo = CONTAINING_RECORD(pbo, EBRUSHOBJ, BrushObject);
pebo->pengbrush = (PVOID)psurfRealize;
return TRUE;
}
static void
sw_MapRenderbuffer(struct gl_context *ctx,
struct gl_renderbuffer *rb,
GLuint x, GLuint y, GLuint w, GLuint h,
GLbitfield mode,
GLubyte **mapOut, GLint *rowStrideOut)
{
if(rb->ClassID == SW_FRONT_RENDERBUFFER_CLASS)
{
/* This is our front buffer */
struct sw_front_renderbuffer* srb = (struct sw_front_renderbuffer*)rb;
struct sw_framebuffer* fb = CONTAINING_RECORD(srb, struct sw_framebuffer, frontbuffer);
/* Set the stride */
*rowStrideOut = WIDTH_BYTES_ALIGN32(rb->Width, pixel_formats[fb->format_index].color_bits);
/* Remember where we "mapped" */
srb->x = x; srb->y = y; srb->w = w; srb->h = h;
/* Remember if we should write it later */
srb->write = !!(mode & GL_MAP_WRITE_BIT);
/* Get the bits, if needed */
if(mode & GL_MAP_READ_BIT)
{
BitBlt(srb->hdcmem, srb->x, srb->y, srb->w, srb->h,
IntGetCurrentDC(), srb->x, srb->y, SRCCOPY);
}
/* And return it */
*mapOut = (BYTE*)srb->swrast.Buffer + *rowStrideOut*y + x*pixel_formats[fb->format_index].color_bits/8;
return;
}
if(rb->ClassID == SW_BACK_RENDERBUFFER_CLASS)
{
/* This is our front buffer */
struct swrast_renderbuffer* srb = (struct swrast_renderbuffer*)rb;
const GLuint bpp = _mesa_get_format_bytes(rb->Format);
/* Set the stride */
*rowStrideOut = srb->RowStride;
*mapOut = (BYTE*)srb->Buffer + srb->RowStride*y + x*bpp;
return;
}
/* Let mesa rasterizer take care of this */
_swrast_map_soft_renderbuffer(ctx, rb, x, y, w, h, mode,
mapOut, rowStrideOut);
}
/* Renderbuffer routines */
static GLboolean
sw_bb_renderbuffer_storage(struct gl_context* ctx, struct gl_renderbuffer *rb,
GLenum internalFormat,
GLuint width, GLuint height)
{
struct swrast_renderbuffer *srb = swrast_renderbuffer(rb);
struct sw_framebuffer* fb = CONTAINING_RECORD(srb, struct sw_framebuffer, backbuffer);
UINT widthBytes = WIDTH_BYTES_ALIGN32(width, pixel_formats[fb->format_index].color_bits);
srb->Base.Format = pixel_formats[fb->format_index].mesa;
if(srb->Buffer)
srb->Buffer = HeapReAlloc(GetProcessHeap(), 0, srb->Buffer, widthBytes*height);
else
srb->Buffer = HeapAlloc(GetProcessHeap(), 0, widthBytes*height);
if(!srb->Buffer)
{
srb->Base.Format = MESA_FORMAT_NONE;
return GL_FALSE;
}
srb->Base.Width = width;
srb->Base.Height = height;
srb->RowStride = widthBytes;
return GL_TRUE;
}
/*
* @implemented
*/
ULONG
APIENTRY
EngSetPointerShape(
_In_ SURFOBJ *pso,
_In_opt_ SURFOBJ *psoMask,
_In_opt_ SURFOBJ *psoColor,
_In_opt_ XLATEOBJ *pxlo,
_In_ LONG xHot,
_In_ LONG yHot,
_In_ LONG x,
_In_ LONG y,
_In_ RECTL *prcl,
_In_ FLONG fl)
{
PDEVOBJ *ppdev;
GDIPOINTER *pgp;
LONG lDelta = 0;
HBITMAP hbmSave = NULL, hbmColor = NULL, hbmMask = NULL;
PSURFACE psurfSave = NULL, psurfColor = NULL, psurfMask = NULL;
RECTL rectl;
SIZEL sizel = {0, 0};
ASSERT(pso);
ppdev = GDIDEV(pso);
pgp = &ppdev->Pointer;
/* Handle the case where we have no XLATEOBJ */
if (pxlo == NULL)
pxlo = &gexloTrivial.xlo;
/* Do we have any bitmap at all? */
if (psoColor || psoMask)
{
/* Get the size of the new pointer */
if (psoColor)
{
sizel.cx = psoColor->sizlBitmap.cx;
sizel.cy = psoColor->sizlBitmap.cy;
}
else// if (psoMask)
{
sizel.cx = psoMask->sizlBitmap.cx;
sizel.cy = psoMask->sizlBitmap.cy / 2;
}
rectl.left = 0;
rectl.top = 0;
rectl.right = sizel.cx;
rectl.bottom = sizel.cy;
/* Calculate lDelta for our surfaces. */
lDelta = WIDTH_BYTES_ALIGN32(sizel.cx,
BitsPerFormat(pso->iBitmapFormat));
/* Create a bitmap for saving the pixels under the cursor. */
hbmSave = EngCreateBitmap(sizel,
lDelta,
pso->iBitmapFormat,
BMF_TOPDOWN | BMF_NOZEROINIT,
NULL);
psurfSave = SURFACE_ShareLockSurface(hbmSave);
if (!psurfSave) goto failure;
}
if (psoColor)
{
if (fl & SPS_ALPHA)
{
/* Always store the alpha cursor in RGB. */
EXLATEOBJ exloSrcRGB;
PEXLATEOBJ pexlo;
pexlo = CONTAINING_RECORD(pxlo, EXLATEOBJ, xlo);
EXLATEOBJ_vInitialize(&exloSrcRGB, pexlo->ppalSrc, &gpalRGB, 0, 0, 0);
hbmColor = EngCreateBitmap(psoColor->sizlBitmap,
WIDTH_BYTES_ALIGN32(sizel.cx, 32),
BMF_32BPP,
BMF_TOPDOWN | BMF_NOZEROINIT,
NULL);
psurfColor = SURFACE_ShareLockSurface(hbmColor);
if (!psurfColor) goto failure;
/* Now copy the given bitmap. */
rectl.bottom = psoColor->sizlBitmap.cy;
IntEngCopyBits(&psurfColor->SurfObj,
psoColor,
NULL,
&exloSrcRGB.xlo,
&rectl,
(POINTL*)&rectl);
EXLATEOBJ_vCleanup(&exloSrcRGB);
}
else
{
/* Color bitmap must have the same format as the dest surface */
if (psoColor->iBitmapFormat != pso->iBitmapFormat)
{
DPRINT1("Screen surface and cursor color bitmap format don't match!.\n");
goto failure;
}
/* Create a bitmap to copy the color bitmap to */
hbmColor = EngCreateBitmap(psoColor->sizlBitmap,
lDelta,
pso->iBitmapFormat,
BMF_TOPDOWN | BMF_NOZEROINIT,
NULL);
psurfColor = SURFACE_ShareLockSurface(hbmColor);
if (!psurfColor) goto failure;
/* Now copy the given bitmap. */
rectl.bottom = psoColor->sizlBitmap.cy;
IntEngCopyBits(&psurfColor->SurfObj,
psoColor,
NULL,
pxlo,
&rectl,
(POINTL*)&rectl);
}
}
/* Create a mask surface */
if (psoMask)
{
EXLATEOBJ exlo;
PPALETTE ppal;
lDelta = WIDTH_BYTES_ALIGN32(sizel.cx, BitsPerFormat(pso->iBitmapFormat));
/* Create a bitmap for the mask */
hbmMask = EngCreateBitmap(psoMask->sizlBitmap,
lDelta,
pso->iBitmapFormat,
BMF_TOPDOWN | BMF_NOZEROINIT,
NULL);
psurfMask = SURFACE_ShareLockSurface(hbmMask);
if (!psurfMask) goto failure;
/* Initialize an EXLATEOBJ */
ppal = PALETTE_ShareLockPalette(ppdev->devinfo.hpalDefault);
EXLATEOBJ_vInitialize(&exlo,
gppalMono,
ppal,
0,
RGB(0xff,0xff,0xff),
RGB(0,0,0));
/* Copy the mask bitmap */
rectl.bottom = psoMask->sizlBitmap.cy;
IntEngCopyBits(&psurfMask->SurfObj,
psoMask,
NULL,
&exlo.xlo,
&rectl,
(POINTL*)&rectl);
/* Cleanup */
EXLATEOBJ_vCleanup(&exlo);
if (ppal) PALETTE_ShareUnlockPalette(ppal);
}
/* Hide mouse pointer */
IntHideMousePointer(ppdev, pso);
/* Free old color bitmap */
if (pgp->psurfColor)
{
EngDeleteSurface(pgp->psurfColor->BaseObject.hHmgr);
SURFACE_ShareUnlockSurface(pgp->psurfColor);
pgp->psurfColor = NULL;
}
/* Free old mask bitmap */
if (pgp->psurfMask)
{
EngDeleteSurface(pgp->psurfMask->BaseObject.hHmgr);
SURFACE_ShareUnlockSurface(pgp->psurfMask);
pgp->psurfMask = NULL;
}
/* Free old save bitmap */
if (pgp->psurfSave)
{
EngDeleteSurface(pgp->psurfSave->BaseObject.hHmgr);
SURFACE_ShareUnlockSurface(pgp->psurfSave);
pgp->psurfSave = NULL;
}
/* See if we are being asked to hide the pointer. */
if (psoMask == NULL && psoColor == NULL)
{
/* We're done */
return SPS_ACCEPT_NOEXCLUDE;
}
/* Now set the new cursor */
pgp->psurfColor = psurfColor;
pgp->psurfMask = psurfMask;
pgp->psurfSave = psurfSave;
pgp->HotSpot.x = xHot;
pgp->HotSpot.y = yHot;
pgp->Size = sizel;
pgp->flags = fl;
if (x != -1)
{
ppdev->ptlPointer.x = x;
ppdev->ptlPointer.y = y;
IntShowMousePointer(ppdev, pso);
if (prcl != NULL)
{
prcl->left = x - pgp->HotSpot.x;
prcl->top = y - pgp->HotSpot.x;
prcl->right = prcl->left + pgp->Size.cx;
prcl->bottom = prcl->top + pgp->Size.cy;
}
}
else if (prcl != NULL)
{
prcl->left = prcl->top = prcl->right = prcl->bottom = -1;
}
return SPS_ACCEPT_NOEXCLUDE;
failure:
/* Cleanup surfaces */
if (hbmMask) EngDeleteSurface((HSURF)hbmMask);
if (psurfMask) SURFACE_ShareUnlockSurface(psurfMask);
if (hbmColor) EngDeleteSurface((HSURF)hbmColor);
if (psurfColor) SURFACE_ShareUnlockSurface(psurfColor);
if (hbmSave) EngDeleteSurface((HSURF)hbmSave);
if (psurfSave) SURFACE_ShareUnlockSurface(psurfSave);
return SPS_ERROR;
}
BOOL APIENTRY
IntEngEnter(PINTENG_ENTER_LEAVE EnterLeave,
SURFOBJ *psoDest,
RECTL *DestRect,
BOOL ReadOnly,
POINTL *Translate,
SURFOBJ **ppsoOutput)
{
LONG Exchange;
SIZEL BitmapSize;
POINTL SrcPoint;
LONG Width;
RECTL ClippedDestRect;
/* Normalize */
if (DestRect->right < DestRect->left)
{
Exchange = DestRect->left;
DestRect->left = DestRect->right;
DestRect->right = Exchange;
}
if (DestRect->bottom < DestRect->top)
{
Exchange = DestRect->top;
DestRect->top = DestRect->bottom;
DestRect->bottom = Exchange;
}
if (NULL != psoDest && STYPE_BITMAP != psoDest->iType &&
(NULL == psoDest->pvScan0 || 0 == psoDest->lDelta))
{
/* Driver needs to support DrvCopyBits, else we can't do anything */
SURFACE *psurfDest = CONTAINING_RECORD(psoDest, SURFACE, SurfObj);
if (!(psurfDest->flags & HOOK_COPYBITS))
{
return FALSE;
}
/* Allocate a temporary bitmap */
BitmapSize.cx = DestRect->right - DestRect->left;
BitmapSize.cy = DestRect->bottom - DestRect->top;
Width = WIDTH_BYTES_ALIGN32(BitmapSize.cx, BitsPerFormat(psoDest->iBitmapFormat));
EnterLeave->OutputBitmap = EngCreateBitmap(BitmapSize, Width,
psoDest->iBitmapFormat,
BMF_TOPDOWN | BMF_NOZEROINIT, NULL);
if (!EnterLeave->OutputBitmap)
{
DPRINT1("EngCreateBitmap() failed\n");
return FALSE;
}
*ppsoOutput = EngLockSurface((HSURF)EnterLeave->OutputBitmap);
if (*ppsoOutput == NULL)
{
EngDeleteSurface((HSURF)EnterLeave->OutputBitmap);
return FALSE;
}
EnterLeave->DestRect.left = 0;
EnterLeave->DestRect.top = 0;
EnterLeave->DestRect.right = BitmapSize.cx;
EnterLeave->DestRect.bottom = BitmapSize.cy;
SrcPoint.x = DestRect->left;
SrcPoint.y = DestRect->top;
ClippedDestRect = EnterLeave->DestRect;
if (SrcPoint.x < 0)
{
ClippedDestRect.left -= SrcPoint.x;
SrcPoint.x = 0;
}
if (psoDest->sizlBitmap.cx < SrcPoint.x + ClippedDestRect.right - ClippedDestRect.left)
{
ClippedDestRect.right = ClippedDestRect.left + psoDest->sizlBitmap.cx - SrcPoint.x;
}
if (SrcPoint.y < 0)
{
ClippedDestRect.top -= SrcPoint.y;
SrcPoint.y = 0;
}
if (psoDest->sizlBitmap.cy < SrcPoint.y + ClippedDestRect.bottom - ClippedDestRect.top)
{
ClippedDestRect.bottom = ClippedDestRect.top + psoDest->sizlBitmap.cy - SrcPoint.y;
}
EnterLeave->TrivialClipObj = EngCreateClip();
if (EnterLeave->TrivialClipObj == NULL)
{
EngUnlockSurface(*ppsoOutput);
EngDeleteSurface((HSURF)EnterLeave->OutputBitmap);
return FALSE;
}
EnterLeave->TrivialClipObj->iDComplexity = DC_TRIVIAL;
if (ClippedDestRect.left < (*ppsoOutput)->sizlBitmap.cx &&
0 <= ClippedDestRect.right &&
SrcPoint.x < psoDest->sizlBitmap.cx &&
ClippedDestRect.top <= (*ppsoOutput)->sizlBitmap.cy &&
0 <= ClippedDestRect.bottom &&
SrcPoint.y < psoDest->sizlBitmap.cy &&
! GDIDEVFUNCS(psoDest).CopyBits(
*ppsoOutput, psoDest,
EnterLeave->TrivialClipObj, NULL,
&ClippedDestRect, &SrcPoint))
{
EngDeleteClip(EnterLeave->TrivialClipObj);
EngUnlockSurface(*ppsoOutput);
EngDeleteSurface((HSURF)EnterLeave->OutputBitmap);
return FALSE;
}
EnterLeave->DestRect.left = DestRect->left;
EnterLeave->DestRect.top = DestRect->top;
EnterLeave->DestRect.right = DestRect->right;
EnterLeave->DestRect.bottom = DestRect->bottom;
Translate->x = - DestRect->left;
Translate->y = - DestRect->top;
}
else
{
Translate->x = 0;
Translate->y = 0;
*ppsoOutput = psoDest;
}
if (NULL != *ppsoOutput)
{
SURFACE* psurfOutput = CONTAINING_RECORD(*ppsoOutput, SURFACE, SurfObj);
if (0 != (psurfOutput->flags & HOOK_SYNCHRONIZE))
{
if (NULL != GDIDEVFUNCS(*ppsoOutput).SynchronizeSurface)
{
GDIDEVFUNCS(*ppsoOutput).SynchronizeSurface(*ppsoOutput, DestRect, 0);
}
else if (STYPE_BITMAP == (*ppsoOutput)->iType
&& NULL != GDIDEVFUNCS(*ppsoOutput).Synchronize)
{
GDIDEVFUNCS(*ppsoOutput).Synchronize((*ppsoOutput)->dhpdev, DestRect);
}
}
}
else return FALSE;
EnterLeave->DestObj = psoDest;
EnterLeave->OutputObj = *ppsoOutput;
EnterLeave->ReadOnly = ReadOnly;
return TRUE;
}
HBITMAP
NTAPI
GreCreateBitmapEx(
_In_ ULONG nWidth,
_In_ ULONG nHeight,
_In_ ULONG cjWidthBytes,
_In_ ULONG iFormat,
_In_ USHORT fjBitmap,
_In_ ULONG cjSizeImage,
_In_opt_ PVOID pvBits,
_In_ FLONG flags)
{
PSURFACE psurf;
HBITMAP hbmp;
PVOID pvCompressedBits = NULL;
/* Verify format */
if (iFormat < BMF_1BPP || iFormat > BMF_PNG) return NULL;
/* The infamous RLE hack */
if ((iFormat == BMF_4RLE) || (iFormat == BMF_8RLE))
{
pvCompressedBits = pvBits;
pvBits = NULL;
iFormat = (iFormat == BMF_4RLE) ? BMF_4BPP : BMF_8BPP;
}
/* Allocate a surface */
psurf = SURFACE_AllocSurface(STYPE_BITMAP,
nWidth,
nHeight,
iFormat,
fjBitmap,
cjWidthBytes,
pvBits);
if (!psurf)
{
DPRINT1("SURFACE_AllocSurface failed.\n");
return NULL;
}
/* The infamous RLE hack */
if (pvCompressedBits)
{
SIZEL sizl;
LONG lDelta;
sizl.cx = nWidth;
sizl.cy = nHeight;
lDelta = WIDTH_BYTES_ALIGN32(nWidth, gajBitsPerFormat[iFormat]);
pvBits = psurf->SurfObj.pvBits;
DecompressBitmap(sizl, pvCompressedBits, pvBits, lDelta, iFormat);
}
/* Get the handle for the bitmap */
hbmp = (HBITMAP)psurf->SurfObj.hsurf;
/* Mark as API bitmap */
psurf->flags |= (flags | API_BITMAP);
/* Unlock the surface and return */
SURFACE_UnlockSurface(psurf);
return hbmp;
}
PSURFACE
NTAPI
SURFACE_AllocSurface(
_In_ USHORT iType,
_In_ ULONG cx,
_In_ ULONG cy,
_In_ ULONG iFormat,
_In_ ULONG fjBitmap,
_In_opt_ ULONG cjWidth,
_In_opt_ ULONG cjBufSize,
_In_opt_ PVOID pvBits)
{
ULONG cBitsPixel, cjBits, cjObject;
PSURFACE psurf;
SURFOBJ *pso;
PVOID pvSection;
NT_ASSERT(!pvBits || (iType == STYPE_BITMAP));
NT_ASSERT((iFormat <= BMF_32BPP) || (cjBufSize != 0));
NT_ASSERT((LONG)cy > 0);
/* Verify format */
if ((iFormat < BMF_1BPP) || (iFormat > BMF_PNG))
{
DPRINT1("Invalid bitmap format: %lu\n", iFormat);
return NULL;
}
/* Get bits per pixel from the format */
cBitsPixel = gajBitsPerFormat[iFormat];
/* Are bits and a width in bytes given? */
if (pvBits && cjWidth)
{
/* Align the width (Windows compatibility, drivers expect that) */
cjWidth = WIDTH_BYTES_ALIGN32((cjWidth << 3) / cBitsPixel, cBitsPixel);
}
else
{
/* Calculate width from the bitmap width in pixels */
cjWidth = WIDTH_BYTES_ALIGN32(cx, cBitsPixel);
}
/* Is this an uncompressed format? */
if (iFormat <= BMF_32BPP)
{
/* Calculate the correct bitmap size in bytes */
if (!NT_SUCCESS(RtlULongMult(cjWidth, cy, &cjBits)))
{
DPRINT1("Overflow calculating size: cjWidth %lu, cy %lu\n",
cjWidth, cy);
return NULL;
}
/* Did we get a buffer and size? */
if ((pvBits != NULL) && (cjBufSize != 0))
{
/* Make sure the buffer is large enough */
if (cjBufSize < cjBits)
{
DPRINT1("Buffer is too small, required: %lu, got %lu\n",
cjBits, cjBufSize);
return NULL;
}
}
}
else
{
/* Compressed format, use the provided size */
NT_ASSERT(cjBufSize != 0);
cjBits = cjBufSize;
}
/* Check if we need an extra large object */
if ((iType == STYPE_BITMAP) && (pvBits == NULL) &&
!(fjBitmap & BMF_USERMEM) && !(fjBitmap & BMF_KMSECTION))
{
/* Allocate an object large enough to hold the bits */
cjObject = sizeof(SURFACE) + cjBits;
}
else
{
/* Otherwise just allocate the SURFACE structure */
cjObject = sizeof(SURFACE);
}
/* Check for arithmetic overflow */
if (cjObject < sizeof(SURFACE))
{
/* Fail! */
DPRINT1("Overflow calculating cjObject: cjBits %lu\n", cjBits);
return NULL;
}
/* Allocate a SURFACE object */
psurf = (PSURFACE)GDIOBJ_AllocObjWithHandle(GDI_OBJECT_TYPE_BITMAP, cjObject);
if (!psurf)
{
return NULL;
}
/* Initialize the basic fields */
pso = &psurf->SurfObj;
pso->hsurf = psurf->BaseObject.hHmgr;
pso->sizlBitmap.cx = cx;
pso->sizlBitmap.cy = cy;
pso->iBitmapFormat = iFormat;
pso->iType = iType;
pso->fjBitmap = (USHORT)fjBitmap;
pso->iUniq = InterlockedIncrement(&giUniqueSurface);
pso->cjBits = cjBits;
/* Check if we need a bitmap buffer */
if (iType == STYPE_BITMAP)
{
/* Check if we got one or if we need to allocate one */
if (pvBits != NULL)
{
/* Use the caller provided buffer */
pso->pvBits = pvBits;
}
else if (fjBitmap & BMF_USERMEM)
{
/* User mode memory was requested */
pso->pvBits = EngAllocUserMem(cjBits, 0);
/* Check for failure */
if (!pso->pvBits)
{
GDIOBJ_vDeleteObject(&psurf->BaseObject);
return NULL;
}
}
else if (fjBitmap & BMF_KMSECTION)
{
/* Use a kernel mode section */
pso->pvBits = EngAllocSectionMem(&pvSection,
(fjBitmap & BMF_NOZEROINIT) ?
0 : FL_ZERO_MEMORY,
cjBits, TAG_DIB);
/* Check for failure */
if (!pso->pvBits)
{
GDIOBJ_vDeleteObject(&psurf->BaseObject);
return NULL;
}
/* Free the section already, but keep the mapping */
EngFreeSectionMem(pvSection, NULL);
}
else
{
/* Buffer is after the object */
pso->pvBits = psurf + 1;
/* Zero the buffer, except requested otherwise */
if (!(fjBitmap & BMF_NOZEROINIT))
{
RtlZeroMemory(pso->pvBits, cjBits);
}
}
/* Set pvScan0 and lDelta */
if (fjBitmap & BMF_TOPDOWN)
{
/* Topdown is the normal way */
pso->pvScan0 = pso->pvBits;
pso->lDelta = cjWidth;
}
else
{
/* Inversed bitmap (bottom up) */
pso->pvScan0 = ((PCHAR)pso->pvBits + pso->cjBits - cjWidth);
pso->lDelta = -(LONG)cjWidth;
}
}
else
{
/* There are no bitmap bits */
pso->pvScan0 = pso->pvBits = NULL;
pso->lDelta = 0;
}
/* Assign a default palette and increment its reference count */
SURFACE_vSetPalette(psurf, appalSurfaceDefault[iFormat]);
return psurf;
}