/******************************Module*Header*******************************\ * * ******************* * * GDI SAMPLE CODE * * ******************* * * Module Name: bitblt.c * * Contains the high-level DrvBitBlt and DrvCopyBits functions. The low- * level stuff lives in the 'blt??.c' files. * * Note: The way we've implemented device-bitmaps has changed in NT5, with * the advent of 'EngModifySurface' and 'DrvDeriveSurface'. Now, * off-screen bitmaps will always have an iType of STYPE_BITMAP * (meaning that GDI can draw directly on the bits if it needs to). * Additionally, former off-screen bitmaps that have been converted * by us to system-memory DIBs will still have an iType of STYPE_BITMAP. * * Copyright (c) 1992-1998 Microsoft Corporation \**************************************************************************/ #include "precomp.h" /******************************Public*Routine******************************\ * VOID vXferNativeSrccopy * * Does a SRCCOPY transfer of a bitmap to the screen using the frame * buffer, because with USWC write-combining it's significantly faster * than using the data transfer register. * \**************************************************************************/ VOID vXferNativeSrccopy( // Type FNXFER PDEV* ppdev, LONG c, // Count of rectangles, can't be zero RECTL* prcl, // List of destination rectangles, in relative // coordinates ULONG rop4, // Not used SURFOBJ* psoSrc, // Source surface POINTL* pptlSrc, // Original unclipped source point RECTL* prclDst, // Original unclipped destination rectangle XLATEOBJ* pxlo) // Not used { LONG xOffset; LONG yOffset; LONG dx; LONG dy; RECTL rclDst; POINTL ptlSrc; ASSERTDD((pxlo == NULL) || (pxlo->flXlate & XO_TRIVIAL), "Can handle trivial xlate only"); ASSERTDD(psoSrc->iBitmapFormat == ppdev->iBitmapFormat, "Source must be same colour depth as screen"); ASSERTDD(c > 0, "Can't handle zero rectangles"); ASSERTDD(rop4 == 0xcccc, "Must be a SRCCOPY rop"); xOffset = ppdev->xOffset; yOffset = ppdev->yOffset; dx = pptlSrc->x - prclDst->left; dy = pptlSrc->y - prclDst->top; // Add to destination to get source while (TRUE) { ptlSrc.x = prcl->left + dx; ptlSrc.y = prcl->top + dy; // 'vPutBits' takes only absolute coordinates, so add in the // off-screen bitmap offset here: rclDst.left = prcl->left + xOffset; rclDst.right = prcl->right + xOffset; rclDst.top = prcl->top + yOffset; rclDst.bottom = prcl->bottom + yOffset; vPutBits(ppdev, psoSrc, &rclDst, &ptlSrc); if (--c == 0) return; prcl++; } } /******************************Public*Routine******************************\ * VOID vReadNativeSrccopy * * Does a SRCCOPY read from the screen to a system-memory bitmap. The only * reason we do this here instead of punting to GDI is to ensure that we * do dword reads that are aligned to the video-memory source and not the * system-memory destination. * \**************************************************************************/ VOID vReadNativeSrccopy( // Type FNXFER PDEV* ppdev, LONG c, // Count of rectangles, can't be zero RECTL* prcl, // List of destination rectangles, in relative // coordinates ULONG rop4, // Not used SURFOBJ* psoDst, // Destination surface POINTL* pptlSrc, // Original unclipped source point RECTL* prclDst, // Original unclipped destination rectangle XLATEOBJ* pxlo) // Not used { LONG xOffset; LONG yOffset; LONG dx; LONG dy; RECTL rclDst; POINTL ptlSrc; ASSERTDD((pxlo == NULL) || (pxlo->flXlate & XO_TRIVIAL), "Can handle trivial xlate only"); ASSERTDD(psoDst->iBitmapFormat == ppdev->iBitmapFormat, "Source must be same colour depth as screen"); ASSERTDD(c > 0, "Can't handle zero rectangles"); ASSERTDD(rop4 == 0xcccc, "Must be a SRCCOPY rop"); xOffset = ppdev->xOffset; yOffset = ppdev->yOffset; dx = pptlSrc->x - prclDst->left; dy = pptlSrc->y - prclDst->top; // Add to destination to get source while (TRUE) { // 'vGetBits' takes only absolute coordinates, so add in the // off-screen bitmap offset here: ptlSrc.x = prcl->left + dx + xOffset; ptlSrc.y = prcl->top + dy + yOffset; vGetBits(ppdev, psoDst, prcl, &ptlSrc); if (--c == 0) return; prcl++; } } /******************************Public*Routine******************************\ * BOOL bPuntBlt * * Has GDI do any drawing operations that we don't specifically handle * in the driver. * \**************************************************************************/ BOOL bPuntBlt( SURFOBJ* psoDst, SURFOBJ* psoSrc, SURFOBJ* psoMsk, CLIPOBJ* pco, XLATEOBJ* pxlo, RECTL* prclDst, POINTL* pptlSrc, POINTL* pptlMsk, BRUSHOBJ* pbo, POINTL* pptlBrush, ROP4 rop4) { PDEV* ppdev; if (psoDst->dhsurf != NULL) ppdev = (PDEV*) psoDst->dhpdev; else ppdev = (PDEV*) psoSrc->dhpdev; #if DBG { ////////////////////////////////////////////////////////////////////// // Diagnostics // // Since calling the engine to do any drawing can be rather painful, // particularly when the source is an off-screen DFB (since GDI will // have to allocate a DIB and call us to make a temporary copy before // it can even start drawing), we'll try to avoid it as much as // possible. // // Here we simply spew out information describing the blt whenever // this routine gets called (checked builds only, of course): ULONG ulClip; PDEV* dbg_ppdev; if (psoDst->dhsurf != NULL) dbg_ppdev = (PDEV*) psoDst->dhpdev; else dbg_ppdev = (PDEV*) psoSrc->dhpdev; ulClip = (pco == NULL) ? DC_TRIVIAL : pco->iDComplexity; DISPDBG((2, ">> Punt << Dst format: %li Dst type: %li Clip: %li Rop: %lx", psoDst->iBitmapFormat, psoDst->iType, ulClip, rop4)); if (psoSrc != NULL) { DISPDBG((2, " << Src format: %li Src type: %li", psoSrc->iBitmapFormat, psoSrc->iType)); if (psoSrc->iBitmapFormat == BMF_1BPP) { DISPDBG((2, " << Foreground: %lx Background: %lx", pxlo->pulXlate[1], pxlo->pulXlate[0])); } } if ((pxlo != NULL) && !(pxlo->flXlate & XO_TRIVIAL) && (psoSrc != NULL)) { if (((psoSrc->dhsurf == NULL) && (psoSrc->iBitmapFormat != dbg_ppdev->iBitmapFormat)) || ((psoDst->dhsurf == NULL) && (psoDst->iBitmapFormat != dbg_ppdev->iBitmapFormat))) { // Don't bother printing the 'xlate' message when the source // is a different bitmap format from the destination -- in // those cases we know there always has to be a translate. } else { DISPDBG((2, " << With xlate")); } } // If the rop4 requires a pattern, and it's a non-solid brush... if (((((rop4 >> 4) ^ (rop4)) & 0x0f0f) != 0) && (pbo->iSolidColor == -1)) { if (pbo->pvRbrush == NULL) DISPDBG((2, " << With brush -- Not created")); else DISPDBG((2, " << With brush -- Created Ok")); } } #endif if (DIRECT_ACCESS(ppdev)) { ////////////////////////////////////////////////////////////////////// // Banked Framebuffer bPuntBlt // // This section of code handles a PuntBlt when GDI can directly draw // on the framebuffer, but the drawing has to be done in banks: BANK bnk; BOOL b; HSURF hsurfTmp; SURFOBJ* psoTmp; SIZEL sizl; POINTL ptlSrc; RECTL rclTmp; RECTL rclDst; DSURF* pdsurfDst; DSURF* pdsurfSrc; // We copy the original destination rectangle, and use that in every // GDI call-back instead of the original because sometimes GDI is // sneaky and points 'prclDst' to '&pco->rclBounds'. Because we // modify 'rclBounds', that would affect 'prclDst', which we don't // want to happen: rclDst = *prclDst; pdsurfDst = (DSURF*) psoDst->dhsurf; pdsurfSrc = (psoSrc == NULL) ? NULL : (DSURF*) psoSrc->dhsurf; if ((pdsurfSrc == NULL) || (pdsurfSrc->dt & DT_DIB)) { // Do a memory-to-screen blt: vBankStart(ppdev, &rclDst, pco, &bnk); b = TRUE; do { b &= EngBitBlt(bnk.pso, psoSrc, psoMsk, bnk.pco, pxlo, &rclDst, pptlSrc, pptlMsk, pbo, pptlBrush, rop4); } while (bBankEnum(&bnk)); } else { b = FALSE; // Assume failure // The screen is the source (it may be the destination too...) ptlSrc.x = pptlSrc->x + ppdev->xOffset; ptlSrc.y = pptlSrc->y + ppdev->yOffset; if ((pco != NULL) && (pco->iDComplexity != DC_TRIVIAL)) { // We have to intersect the destination rectangle with // the clip bounds if there is one (consider the case // where the app asked to blt a really, really big // rectangle from the screen -- prclDst would be really, // really big but pco->rclBounds would be the actual // area of interest): rclDst.left = max(rclDst.left, pco->rclBounds.left); rclDst.top = max(rclDst.top, pco->rclBounds.top); rclDst.right = min(rclDst.right, pco->rclBounds.right); rclDst.bottom = min(rclDst.bottom, pco->rclBounds.bottom); // Correspondingly, we have to offset the source point: ptlSrc.x += (rclDst.left - prclDst->left); ptlSrc.y += (rclDst.top - prclDst->top); } // We're now either going to do a screen-to-screen or screen-to-DIB // blt. In either case, we're going to create a temporary copy of // the source. (Why do we do this when GDI could do it for us? // GDI would create a temporary copy of the DIB for every bank // call-back!) sizl.cx = rclDst.right - rclDst.left; sizl.cy = rclDst.bottom - rclDst.top; // Don't forget to convert from relative to absolute coordinates // on the source! (vBankStart takes care of that for the // destination.) rclTmp.right = sizl.cx; rclTmp.bottom = sizl.cy; rclTmp.left = 0; rclTmp.top = 0; // GDI does guarantee us that the blt extents have already been // clipped to the surface boundaries (we don't have to worry // here about trying to read where there isn't video memory). // Let's just assert to make sure: ASSERTDD((ptlSrc.x >= 0) && (ptlSrc.y >= 0) && (ptlSrc.x + sizl.cx <= ppdev->cxMemory) && (ptlSrc.y + sizl.cy <= ppdev->cyMemory), "Source rectangle out of bounds!"); hsurfTmp = (HSURF) EngCreateBitmap(sizl, 0, // Let GDI choose ulWidth ppdev->iBitmapFormat, 0, // Don't need any options NULL);// Let GDI allocate if (hsurfTmp != 0) { psoTmp = EngLockSurface(hsurfTmp); if (psoTmp != NULL) { vGetBits(ppdev, psoTmp, &rclTmp, &ptlSrc); if ((pdsurfDst == NULL) || (pdsurfDst->dt & DT_DIB)) { // It was a Screen-to-DIB blt; now it's a DIB-to-DIB // blt. Note that the source point is (0, 0) in our // temporary surface: b = EngBitBlt(psoDst, psoTmp, psoMsk, pco, pxlo, &rclDst, (POINTL*) &rclTmp, pptlMsk, pbo, pptlBrush, rop4); } else { // It was a Screen-to-Screen blt; now it's a DIB-to- // screen blt. Note that the source point is (0, 0) // in our temporary surface: vBankStart(ppdev, &rclDst, pco, &bnk); b = TRUE; do { b &= EngBitBlt(bnk.pso, psoTmp, psoMsk, bnk.pco, pxlo, &rclDst, (POINTL*) &rclTmp, pptlMsk, pbo, pptlBrush, rop4); } while (bBankEnum(&bnk)); } EngUnlockSurface(psoTmp); } EngDeleteSurface(hsurfTmp); } } return(b); } #if !defined(_X86_) else { ////////////////////////////////////////////////////////////////////// // Really Slow bPuntBlt // // Here we handle a PuntBlt when GDI can't draw directly on the // framebuffer (as on the Alpha, which can't do it because of its // 32 bit bus). If you thought the banked version was slow, just // look at this one. Guaranteed, there will be at least one bitmap // allocation and extra copy involved; there could be two if it's a // screen-to-screen operation. POINTL ptlSrc; RECTL rclDst; SIZEL sizl; BOOL bSrcIsScreen; HSURF hsurfSrc; RECTL rclTmp; BOOL b; LONG lDelta; BYTE* pjBits; BYTE* pjScan0; HSURF hsurfDst; RECTL rclScreen; b = FALSE; // For error cases, assume we'll fail rclDst = *prclDst; if (pptlSrc != NULL) ptlSrc = *pptlSrc; if ((pco != NULL) && (pco->iDComplexity != DC_TRIVIAL)) { // We have to intersect the destination rectangle with // the clip bounds if there is one (consider the case // where the app asked to blt a really, really big // rectangle from the screen -- prclDst would be really, // really big but pco->rclBounds would be the actual // area of interest): rclDst.left = max(rclDst.left, pco->rclBounds.left); rclDst.top = max(rclDst.top, pco->rclBounds.top); rclDst.right = min(rclDst.right, pco->rclBounds.right); rclDst.bottom = min(rclDst.bottom, pco->rclBounds.bottom); ptlSrc.x += (rclDst.left - prclDst->left); ptlSrc.y += (rclDst.top - prclDst->top); } sizl.cx = rclDst.right - rclDst.left; sizl.cy = rclDst.bottom - rclDst.top; // We only need to make a copy from the screen if the source is // the screen, and the source is involved in the rop. Note that // we have to check the rop before dereferencing 'psoSrc' // (because 'psoSrc' may be NULL if the source isn't involved): bSrcIsScreen = (((((rop4 >> 2) ^ (rop4)) & 0x3333) != 0) && (psoSrc->dhsurf != NULL)); if (bSrcIsScreen) { // We need to create a copy of the source rectangle: hsurfSrc = (HSURF) EngCreateBitmap(sizl, 0, ppdev->iBitmapFormat, 0, NULL); if (hsurfSrc == 0) goto Error_0; psoSrc = EngLockSurface(hsurfSrc); if (psoSrc == NULL) goto Error_1; rclTmp.left = 0; rclTmp.top = 0; rclTmp.right = sizl.cx; rclTmp.bottom = sizl.cy; // vGetBits takes absolute coordinates for the source point: ptlSrc.x += ppdev->xOffset; ptlSrc.y += ppdev->yOffset; vGetBits(ppdev, psoSrc, &rclTmp, &ptlSrc); // The source will now come from (0, 0) of our temporary source // surface: ptlSrc.x = 0; ptlSrc.y = 0; } if (psoDst->dhsurf == NULL) { b = EngBitBlt(psoDst, psoSrc, psoMsk, pco, pxlo, &rclDst, &ptlSrc, pptlMsk, pbo, pptlBrush, rop4); } else { // We need to create a temporary work buffer. We have to do // some fudging with the offsets so that the upper-left corner // of the (relative coordinates) clip object bounds passed to // GDI will be transformed to the upper-left corner of our // temporary bitmap. // The alignment doesn't have to be as tight as this at 16bpp // and 32bpp, but it won't hurt: lDelta = CONVERT_TO_BYTES((((rclDst.right + 3) & ~3L) - (rclDst.left & ~3L)), ppdev); // We're actually only allocating a bitmap that is 'sizl.cx' x // 'sizl.cy' in size: pjBits = EngAllocMem(0, lDelta * sizl.cy, ALLOC_TAG); if (pjBits == NULL) goto Error_2; // We now adjust the surface's 'pvScan0' so that when GDI thinks // it's writing to pixel (rclDst.top, rclDst.left), it will // actually be writing to the upper-left pixel of our temporary // bitmap: pjScan0 = pjBits - (rclDst.top * lDelta) - CONVERT_TO_BYTES((rclDst.left & ~3L), ppdev); ASSERTDD((((ULONG_PTR) pjScan0) & 3) == 0, "pvScan0 must be dword aligned!"); // The checked build of GDI sometimes checks on blts that // prclDst->right <= pso->sizl.cx, so we lie to it about // the size of our bitmap: sizl.cx = rclDst.right; sizl.cy = rclDst.bottom; hsurfDst = (HSURF) EngCreateBitmap( sizl, // Bitmap covers rectangle lDelta, // Use this delta ppdev->iBitmapFormat, // Same colour depth BMF_TOPDOWN, // Must have a positive delta pjScan0); // Where (0, 0) would be if ((hsurfDst == 0) || (!EngAssociateSurface(hsurfDst, ppdev->hdevEng, 0))) goto Error_3; psoDst = EngLockSurface(hsurfDst); if (psoDst == NULL) goto Error_4; // Make sure that the rectangle we Get/Put from/to the screen // is in absolute coordinates: rclScreen.left = rclDst.left + ppdev->xOffset; rclScreen.right = rclDst.right + ppdev->xOffset; rclScreen.top = rclDst.top + ppdev->yOffset; rclScreen.bottom = rclDst.bottom + ppdev->yOffset; // It would be nice to get a copy of the destination rectangle // only when the ROP involves the destination (or when the source // is an RLE), but we can't do that. If the brush is truly NULL, // GDI will immediately return TRUE from EngBitBlt, without // modifying the temporary bitmap -- and we would proceed to // copy the uninitialized temporary bitmap back to the screen. vGetBits(ppdev, psoDst, &rclDst, (POINTL*) &rclScreen); b = EngBitBlt(psoDst, psoSrc, psoMsk, pco, pxlo, &rclDst, &ptlSrc, pptlMsk, pbo, pptlBrush, rop4); vPutBits(ppdev, psoDst, &rclScreen, (POINTL*) &rclDst); EngUnlockSurface(psoDst); Error_4: EngDeleteSurface(hsurfDst); Error_3: EngFreeMem(pjBits); } Error_2: if (bSrcIsScreen) { EngUnlockSurface(psoSrc); Error_1: EngDeleteSurface(hsurfSrc); } Error_0: return(b); } #endif } /******************************Public*Routine******************************\ * BOOL DrvBitBlt * * Implements the workhorse routine of a display driver. * \**************************************************************************/ BOOL DrvBitBlt( SURFOBJ* psoDst, SURFOBJ* psoSrc, SURFOBJ* psoMsk, CLIPOBJ* pco, XLATEOBJ* pxlo, RECTL* prclDst, POINTL* pptlSrc, POINTL* pptlMsk, BRUSHOBJ* pbo, POINTL* pptlBrush, ROP4 rop4) { PDEV* ppdev; DSURF* pdsurfDst; DSURF* pdsurfSrc; POINTL ptlSrc; BOOL bMore; CLIPENUM ce; LONG c; RECTL rcl; BYTE rop3; FNFILL* pfnFill; RBRUSH_COLOR rbc; // Realized brush or solid colour FNXFER* pfnXfer; ULONG iSrcBitmapFormat; ULONG iDir; BOOL bRet; bRet = TRUE; // Assume success pdsurfDst = (DSURF*) psoDst->dhsurf; // May be NULL if (psoSrc == NULL) { pdsurfSrc = NULL; if (!(pdsurfDst->dt & DT_DIB)) { /////////////////////////////////////////////////////////////////// // Fills /////////////////////////////////////////////////////////////////// // Fills are this function's "raison d'etre", so we handle them // as quickly as possible: ppdev = (PDEV*) psoDst->dhpdev; ppdev->xOffset = pdsurfDst->x; ppdev->yOffset = pdsurfDst->y; // Make sure it doesn't involve a mask (i.e., it's really a // Rop3): rop3 = (BYTE) rop4; if ((BYTE) (rop4 >> 8) == rop3) { // Since 'psoSrc' is NULL, the rop3 had better not indicate // that we need a source. ASSERTDD((((rop4 >> 2) ^ (rop4)) & 0x33) == 0, "Need source but GDI gave us a NULL 'psoSrc'"); Fill_It: pfnFill = ppdev->pfnFillSolid; // Default to solid fill if ((((rop3 >> 4) ^ (rop3)) & 0xf) != 0) { // The rop says that a pattern is truly required // (blackness, for instance, doesn't need one): rbc.iSolidColor = pbo->iSolidColor; if (rbc.iSolidColor == -1) { // Try and realize the pattern brush; by doing // this call-back, GDI will eventually call us // again through DrvRealizeBrush: rbc.prb = pbo->pvRbrush; if (rbc.prb == NULL) { rbc.prb = BRUSHOBJ_pvGetRbrush(pbo); if (rbc.prb == NULL) { // If we couldn't realize the brush, punt // the call (it may have been a non 8x8 // brush or something, which we can't be // bothered to handle, so let GDI do the // drawing): goto Punt_It; } } if ((ppdev->iBitmapFormat == BMF_24BPP) && ((BYTE) (rop4 >> 8) != rop3)) { goto Punt_It; } pfnFill = ppdev->pfnFillPat; } } // Note that these 2 'if's are more efficient than // a switch statement: if ((pco == NULL) || (pco->iDComplexity == DC_TRIVIAL)) { pfnFill(ppdev, 1, prclDst, rop4, rbc, pptlBrush); goto All_Done; } else if (pco->iDComplexity == DC_RECT) { if (bIntersect(prclDst, &pco->rclBounds, &rcl)) pfnFill(ppdev, 1, &rcl, rop4, rbc, pptlBrush); goto All_Done; } else { CLIPOBJ_cEnumStart(pco, FALSE, CT_RECTANGLES, CD_ANY, 0); do { bMore = CLIPOBJ_bEnum(pco, sizeof(ce), (ULONG*) &ce); c = cIntersect(prclDst, ce.arcl, ce.c); if (c != 0) pfnFill(ppdev, c, ce.arcl, rop4, rbc, pptlBrush); } while (bMore); goto All_Done; } } } else { // Thanks to EngModifySurface, the destination is really a // plane old DIB, so we can forget about our DSURF structure // (this will simplify checks later in this routine): pdsurfDst = NULL; } } else { pdsurfDst = (DSURF*) psoDst->dhsurf; if ((pdsurfDst != NULL) && (pdsurfDst->dt & DT_DIB)) { // The destination is really a plane old DIB. pdsurfDst = NULL; } pdsurfSrc = (DSURF*) psoSrc->dhsurf; if ((pdsurfSrc != NULL) && (pdsurfSrc->dt & DT_DIB)) { // Here we consider putting a DIB DFB back into off-screen // memory. If there's a translate, it's probably not worth // moving since we won't be able to use the hardware to do // the blt (a similar argument could be made for weird rops // and stuff that we'll only end up having GDI simulate, but // those should happen infrequently enough that I don't care). // // This is only worth doing if the destination is in off- // screen memory, though! if ((pdsurfDst != NULL) && ((pxlo == NULL) || (pxlo->flXlate & XO_TRIVIAL))) { ppdev = pdsurfSrc->ppdev; // See 'DrvCopyBits' for some more comments on how this // moving-it-back-into-off-screen-memory thing works: if (pdsurfSrc->iUniq == ppdev->iHeapUniq) { if (--pdsurfSrc->cBlt == 0) { if (bMoveDibToOffscreenDfbIfRoom(ppdev, pdsurfSrc)) goto Continue_It; } } else { // Some space was freed up in off-screen memory, // so reset the counter for this DFB: pdsurfSrc->iUniq = ppdev->iHeapUniq; pdsurfSrc->cBlt = HEAP_COUNT_DOWN; } } // The source is really a plane old DIB. pdsurfSrc = NULL; } } Continue_It: ASSERTDD((pdsurfSrc == NULL) || !(pdsurfSrc->dt & DT_DIB), "pdsurfSrc should be non-NULL only if in off-screen memory"); ASSERTDD((pdsurfDst == NULL) || !(pdsurfDst->dt & DT_DIB), "pdsurfDst should be non-NULL only if in off-screen memory"); if (pdsurfDst != NULL) { // The destination is in video memory. if (pdsurfSrc != NULL) { // The source is also in video memory. This is effectively // a screen-to-screen blt, so adjust the source point: ptlSrc.x = pptlSrc->x - (pdsurfDst->x - pdsurfSrc->x); ptlSrc.y = pptlSrc->y - (pdsurfDst->y - pdsurfSrc->y); pptlSrc = &ptlSrc; } ppdev = pdsurfDst->ppdev; ppdev->xOffset = pdsurfDst->x; ppdev->yOffset = pdsurfDst->y; } else { // The destination is a DIB. if (pdsurfSrc == NULL) { // The source is a DIB, too. Let GDI handle it. goto EngBitBlt_It; } ppdev = pdsurfSrc->ppdev; ppdev->xOffset = pdsurfSrc->x; ppdev->yOffset = pdsurfSrc->y; } if (((rop4 >> 8) & 0xff) == (rop4 & 0xff)) { // Since we've already handled the cases where the ROP4 is really // a ROP3 and no source is required, we can assert... ASSERTDD((psoSrc != NULL) && (pptlSrc != NULL), "Expected no-source case to already have been handled"); /////////////////////////////////////////////////////////////////// // Bitmap transfers /////////////////////////////////////////////////////////////////// // Since the foreground and background ROPs are the same, we // don't have to worry about no stinking masks (it's a simple // Rop3). rop3 = (BYTE) rop4; // Make it into a Rop3 (we keep the rop4 // around in case we decide to punt) if (pdsurfDst != NULL) { // The destination is the screen. See if the ROP3 requires a // pattern: if ((rop3 >> 4) == (rop3 & 0xf)) { // Nope, the ROP3 doesn't require a pattern. if (pdsurfSrc == NULL) { ////////////////////////////////////////////////// // DIB-to-screen blt iSrcBitmapFormat = psoSrc->iBitmapFormat; if (iSrcBitmapFormat == BMF_1BPP) { pfnXfer = ppdev->pfnXfer1bpp; goto Xfer_It; } else if ((iSrcBitmapFormat == ppdev->iBitmapFormat) && ((pxlo == NULL) || (pxlo->flXlate & XO_TRIVIAL))) { if ((rop3 & 0xf) != 0xc) { pfnXfer = ppdev->pfnXferNative; } else { // Thanks to USWC write-combining, for SRCCOPY // blts it will be much stupendously faster to copy // directly to the frame buffer than to use the // transfer register. Note that this is true for // almost any video adapter (including yours). pfnXfer = vXferNativeSrccopy; } goto Xfer_It; } // Expansions from 4bpp are pretty frequent with a ROP, and // should really be done for all color depths, not just 4bpp. // // Note, though, that USWC means it's faster to punt to GDI // for all SRCCOPY cases. else if ((iSrcBitmapFormat == BMF_4BPP) && (ppdev->iBitmapFormat == BMF_8BPP) && (rop4 != 0xcccc)) { pfnXfer = ppdev->pfnXfer4bpp; goto Xfer_It; } } else // pdsurfSrc != NULL { if ((pxlo == NULL) || (pxlo->flXlate & XO_TRIVIAL)) { ////////////////////////////////////////////////// // Screen-to-screen blt with no translate if ((pco == NULL) || (pco->iDComplexity == DC_TRIVIAL)) { (ppdev->pfnCopyBlt)(ppdev, 1, prclDst, rop4, pptlSrc, prclDst); goto All_Done; } else if (pco->iDComplexity == DC_RECT) { if (bIntersect(prclDst, &pco->rclBounds, &rcl)) { (ppdev->pfnCopyBlt)(ppdev, 1, &rcl, rop4, pptlSrc, prclDst); } goto All_Done; } else { // Don't forget that we'll have to draw the // rectangles in the correct direction: if (pptlSrc->y >= prclDst->top) { if (pptlSrc->x >= prclDst->left) iDir = CD_RIGHTDOWN; else iDir = CD_LEFTDOWN; } else { if (pptlSrc->x >= prclDst->left) iDir = CD_RIGHTUP; else iDir = CD_LEFTUP; } CLIPOBJ_cEnumStart(pco, FALSE, CT_RECTANGLES, iDir, 0); do { bMore = CLIPOBJ_bEnum(pco, sizeof(ce), (ULONG*) &ce); c = cIntersect(prclDst, ce.arcl, ce.c); if (c != 0) { (ppdev->pfnCopyBlt)(ppdev, c, ce.arcl, rop4, pptlSrc, prclDst); } } while (bMore); goto All_Done; } } } } } else if (((pxlo == NULL) || (pxlo->flXlate & XO_TRIVIAL)) && (rop4 == 0xcccc) && (psoDst->iBitmapFormat == ppdev->iBitmapFormat)) { ////////////////////////////////////////////////// // Screen-to-DIB SRCCOPY blt with no translate // // The only way to read bits from video memory on the S3 is to // have the CPU read directly from the frame-buffer. Unfortunately, // reads from video memory are pathetically slow. // // Have you ever benchmarked reads? On a Pentium II with USWC // enabled, consecutive writes to the frame buffer via PCI on a // typical video card is typically on the order of 80 to 100 MB/s. // Dword reads max out at 6 MB/s! Byte reads (or worse, unaligned // Dword reads) max out at a very small 1.5 MB/s! // // The problem is that if we just punt to GDI, GDI doesn't realize // that the source is video-memory and the destination is system- // memory. It will proceed to align its copy to the destination, // which means that it may do misaligned dword reads from video // memory. So we just dropped our throughput by a factor of 4! // // So the net-result is that we special-case reads here simply so // that we can do aligned dword reads from video memory. pfnXfer = vReadNativeSrccopy; // The Xfer_It routine expects the system-memory surface to come // in as 'psoSrc'. psoSrc = psoDst; // It might also be a thought to convert an off-screen DFB to a // DIB at this point. goto Xfer_It; } } else if ((psoMsk == NULL) && (rop4 == 0xaaf0)) { // The only time GDI will ask us to do a true rop4 using the brush // mask is when the brush is 1bpp, and the background rop is AA // (meaning it's a NOP): rop3 = (BYTE) rop4; goto Fill_It; } // Just fall through to Punt_It... Punt_It: bRet = bPuntBlt(psoDst, psoSrc, psoMsk, pco, pxlo, prclDst, pptlSrc, pptlMsk, pbo, pptlBrush, rop4); goto All_Done; ////////////////////////////////////////////////////////////////////// // Common bitmap transfer Xfer_It: if ((pco == NULL) || (pco->iDComplexity == DC_TRIVIAL)) { pfnXfer(ppdev, 1, prclDst, rop4, psoSrc, pptlSrc, prclDst, pxlo); goto All_Done; } else if (pco->iDComplexity == DC_RECT) { if (bIntersect(prclDst, &pco->rclBounds, &rcl)) pfnXfer(ppdev, 1, &rcl, rop4, psoSrc, pptlSrc, prclDst, pxlo); goto All_Done; } else { CLIPOBJ_cEnumStart(pco, FALSE, CT_RECTANGLES, CD_ANY, 0); do { bMore = CLIPOBJ_bEnum(pco, sizeof(ce), (ULONG*) &ce); c = cIntersect(prclDst, ce.arcl, ce.c); if (c != 0) { pfnXfer(ppdev, c, ce.arcl, rop4, psoSrc, pptlSrc, prclDst, pxlo); } } while (bMore); goto All_Done; } //////////////////////////////////////////////////////////////////////// // Common DIB blt EngBitBlt_It: // Our driver doesn't handle any blt's between two DIBs. Normally // a driver doesn't have to worry about this, but we do because // we have DFBs that may get moved from off-screen memory to a DIB, // where we have GDI do all the drawing. GDI does DIB drawing at // a reasonable speed (unless one of the surfaces is a device- // managed surface...) // // If either the source or destination surface in an EngBitBlt // call-back is a device-managed surface (meaning it's not a DIB // that GDI can draw with), GDI will automatically allocate memory // and call the driver's DrvCopyBits routine to create a DIB copy // that it can use. So this means that this could handle all 'punts', // and we could conceivably get rid of bPuntBlt. But this would have // a bad performance impact because of the extra memory allocations // and bitmap copies -- you really don't want to do this unless you // have to (or your surface was created such that GDI can draw // directly onto it) -- I've been burned by this because it's not // obvious that the performance impact is so bad. // // That being said, we only call EngBitBlt when all the surfaces // are DIBs: bRet = EngBitBlt(psoDst, psoSrc, psoMsk, pco, pxlo, prclDst, pptlSrc, pptlMsk, pbo, pptlBrush, rop4); All_Done: return(bRet); } /******************************Public*Routine******************************\ * BOOL DrvCopyBits * * Do fast bitmap copies. * * DrvCopyBits is just a special-case of DrvBitBlt. Since DrvBitBlt is * plenty fast, we let DrvBitBlt handle all the cases. * * (I used to have a bunch of extra code here to optimize the SRCCOPY * cases, but the performance win was immeasurable. There's no point in * the adding code complexity or the working set hit.) * \**************************************************************************/ BOOL DrvCopyBits( SURFOBJ* psoDst, SURFOBJ* psoSrc, CLIPOBJ* pco, XLATEOBJ* pxlo, RECTL* prclDst, POINTL* pptlSrc) { return(DrvBitBlt(psoDst, psoSrc, NULL, pco, pxlo, prclDst, pptlSrc, NULL, NULL, NULL, 0x0000CCCC)); } /******************************Public*Routine******************************\ * BOOL DrvTransparentBlt * * Do blt using a source color-key. * \**************************************************************************/ BOOL DrvTransparentBlt( SURFOBJ* psoDst, SURFOBJ* psoSrc, CLIPOBJ* pco, XLATEOBJ* pxlo, RECTL* prclDst, RECTL* prclSrc, ULONG iTransparentColor, ULONG ulReserved) { DSURF* pdsurfSrc; DSURF* pdsurfDst; PDEV* ppdev; ULONG c; BOOL bMore; POINTL ptlSrc; RECTL rcl; CLIPENUM ce; pdsurfSrc = (DSURF*) psoSrc->dhsurf; pdsurfDst = (DSURF*) psoDst->dhsurf; // We only handle the case when both surfaces are in video memory // and when no stretching is involved. (GDI using USWC write- // combining is perfectly fast for the case where the source is // a DIB and the destination is video memory.) if (((pdsurfSrc == NULL) || (pdsurfSrc->dt & DT_DIB)) || ((pdsurfDst == NULL) || (pdsurfDst->dt & DT_DIB)) || ((pxlo != NULL) && !(pxlo->flXlate & XO_TRIVIAL)) || ((prclSrc->right - prclSrc->left) != (prclDst->right - prclDst->left)) || ((prclSrc->bottom - prclSrc->top) != (prclDst->bottom - prclDst->top))) { return(EngTransparentBlt(psoDst, psoSrc, pco, pxlo, prclDst, prclSrc, iTransparentColor, ulReserved)); } ppdev = (PDEV*) psoDst->dhpdev; ppdev->xOffset = pdsurfDst->x; ppdev->yOffset = pdsurfDst->y; ptlSrc.x = prclSrc->left - (pdsurfDst->x - pdsurfSrc->x); ptlSrc.y = prclSrc->top - (pdsurfDst->y - pdsurfSrc->y); if ((pco == NULL) || (pco->iDComplexity == DC_TRIVIAL)) { ppdev->pfnCopyTransparent(ppdev, 1, prclDst, &ptlSrc, prclDst, iTransparentColor); } else if (pco->iDComplexity == DC_RECT) { if (bIntersect(prclDst, &pco->rclBounds, &rcl)) ppdev->pfnCopyTransparent(ppdev, 1, &rcl, &ptlSrc, prclDst, iTransparentColor); } else { CLIPOBJ_cEnumStart(pco, FALSE, CT_RECTANGLES, CD_ANY, 0); do { bMore = CLIPOBJ_bEnum(pco, sizeof(ce), (ULONG*) &ce); c = cIntersect(prclDst, ce.arcl, ce.c); if (c != 0) { ppdev->pfnCopyTransparent(ppdev, c, ce.arcl, &ptlSrc, prclDst, iTransparentColor); } } while (bMore); } return(TRUE); }