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windows-nt/Source/XPSP1/NT/drivers/video/matrox/mga/disp/mcd.c

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2020-09-26 03:20:57 -05:00
/******************************Module*Header*******************************\
* Module Name: mcd.c
*
* Main file for the Matrox Millenium OpenGL MCD driver. This file contains
* the entry points needed for an MCD driver.
*
* Copyright (c) 1996 Microsoft Corporation
\**************************************************************************/
#include "precomp.h"
#include <excpt.h>
#include "mcdhw.h"
#include "mcdutil.h"
#include "mcdmath.h"
#define FAIL_ALL_DRAWING 0
#define FORCE_SYNC 0
#define TOTAL_PIXEL_FORMATS (2 * 2) // double-buffers * z-buffers
// Base color pixel formats
static DRVPIXELFORMAT drvFormats[] = { {8, 3, 3, 2, 0, 5, 2, 0, 0},
{16, 5, 5, 5, 0, 10, 5, 0, 0},
{16, 5, 6, 5, 0, 11, 5, 0, 0},
{24, 8, 8, 8, 0, 16, 8, 0, 0},
{32, 8, 8, 8, 0, 16, 8, 0, 0},
};
LONG MCDrvDescribePixelFormat(MCDSURFACE *pMCDSurface, LONG iPixelFormat,
ULONG nBytes, MCDPIXELFORMAT *pMCDPixelFormat,
ULONG flags)
{
BOOL zEnabled;
BOOL doubleBufferEnabled;
DRVPIXELFORMAT *pDrvPixelFormat;
PDEV *ppdev = (PDEV *)pMCDSurface->pso->dhpdev;
// MCDBG_PRINT("MCDrvDescribePixelFormat");
if (!pMCDPixelFormat) {
// We don't support 24bpp or the older MGA:
if ((ppdev->ulBoardId != MGA_STORM) ||
(ppdev->iBitmapFormat == BMF_24BPP))
return 0;
return TOTAL_PIXEL_FORMATS;
}
if (nBytes < sizeof(MCDPIXELFORMAT))
return 0;
if (iPixelFormat > TOTAL_PIXEL_FORMATS)
return 0;
// We don't support the older MGA in this driver:
if (ppdev->ulBoardId != MGA_STORM)
return 0;
iPixelFormat--;
zEnabled = iPixelFormat >= (TOTAL_PIXEL_FORMATS / 2);
doubleBufferEnabled = (iPixelFormat % (TOTAL_PIXEL_FORMATS / 2) ) >=
(TOTAL_PIXEL_FORMATS / 4);
pMCDPixelFormat->nSize = sizeof(MCDPIXELFORMAT);
pMCDPixelFormat->dwFlags = PFD_SWAP_COPY;
if (doubleBufferEnabled)
pMCDPixelFormat->dwFlags |= PFD_DOUBLEBUFFER;
pMCDPixelFormat->iPixelType = PFD_TYPE_RGBA;
switch (ppdev->iBitmapFormat) {
default:
case BMF_8BPP:
pDrvPixelFormat = &drvFormats[0];
pMCDPixelFormat->dwFlags |= (PFD_NEED_SYSTEM_PALETTE | PFD_NEED_PALETTE);
break;
case BMF_16BPP:
if (ppdev->flGreen != 0x7e0) // not 565
pDrvPixelFormat = &drvFormats[1];
else
pDrvPixelFormat = &drvFormats[2];
break;
case BMF_24BPP: // The Millenium doesn't do 3D at 24bpp!
return 0;
case BMF_32BPP:
pDrvPixelFormat = &drvFormats[4];
break;
}
pMCDPixelFormat->cColorBits = pDrvPixelFormat->cColorBits;
pMCDPixelFormat->cRedBits = pDrvPixelFormat->rBits;
pMCDPixelFormat->cGreenBits = pDrvPixelFormat->gBits;
pMCDPixelFormat->cBlueBits = pDrvPixelFormat->bBits;
pMCDPixelFormat->cAlphaBits = pDrvPixelFormat->aBits;
pMCDPixelFormat->cRedShift = pDrvPixelFormat->rShift;
pMCDPixelFormat->cGreenShift = pDrvPixelFormat->gShift;
pMCDPixelFormat->cBlueShift = pDrvPixelFormat->bShift;
pMCDPixelFormat->cAlphaShift = pDrvPixelFormat->aShift;
if (zEnabled)
{
pMCDPixelFormat->cDepthBits = 16;
pMCDPixelFormat->cDepthBufferBits = 16;
pMCDPixelFormat->cDepthShift = 16;
}
else
{
pMCDPixelFormat->cDepthBits = 0;
pMCDPixelFormat->cDepthBufferBits = 0;
pMCDPixelFormat->cDepthShift = 0;
}
// MGA does not support stencil; generic will supply a software
// implementation as necessary.
pMCDPixelFormat->cStencilBits = 0;
pMCDPixelFormat->cOverlayPlanes = 0;
pMCDPixelFormat->cUnderlayPlanes = 0;
pMCDPixelFormat->dwTransparentColor = 0;
return TOTAL_PIXEL_FORMATS;
}
BOOL MCDrvDescribeLayerPlane(MCDSURFACE *pMCDSurface,
LONG iPixelFormat, LONG iLayerPlane,
ULONG nBytes, MCDLAYERPLANE *pMCDLayerPlane,
ULONG flags)
{
//MCDBG_PRINT("MCDrvDescribeLayerPlane");
return FALSE;
}
LONG MCDrvSetLayerPalette(MCDSURFACE *pMCDSurface, LONG iLayerPlane,
BOOL bRealize, LONG cEntries, COLORREF *pcr)
{
//MCDBG_PRINT("MCDrvSetLayerPalette");
return 0;
}
BOOL MCDrvInfo(MCDSURFACE *pMCDSurface, MCDDRIVERINFO *pMCDDriverInfo)
{
// MCDBG_PRINT("MCDrvInfo");
pMCDDriverInfo->verMajor = MCD_VER_MAJOR;
pMCDDriverInfo->verMinor = MCD_VER_MINOR;
pMCDDriverInfo->verDriver = 0x10000;
strcpy(pMCDDriverInfo->idStr, "Matrox STORM (Microsoft)");
pMCDDriverInfo->drvMemFlags = 0;
pMCDDriverInfo->drvBatchMemSizeMax = 128000;
return TRUE;
}
ULONG MCDrvCreateContext(MCDSURFACE *pMCDSurface, MCDRC *pMCDRc,
MCDRCINFO *pRcInfo)
{
DEVRC *pRc;
MCDWINDOW *pMCDWnd = pMCDSurface->pWnd;
DEVWND *pDevWnd;
PDEV *ppdev = (PDEV *)pMCDSurface->pso->dhpdev;
DRVPIXELFORMAT *pDrvPixelFormat;
MCDVERTEX *pv;
BOOL zEnabled;
BOOL doubleBufferEnabled;
ULONG i, maxVi;
// MCDBG_PRINT("MCDrvCreateContext");
// We only support window surfaces:
if (! (pMCDSurface->surfaceFlags & MCDSURFACE_HWND) )
return FALSE;
// We don't support the older MGA in this driver:
if (ppdev->ulBoardId != MGA_STORM)
return FALSE;
if ((pMCDRc->iPixelFormat > TOTAL_PIXEL_FORMATS) ||
(pMCDRc->iPixelFormat < 0)) {
MCDBG_PRINT("MCDrvCreateContext: bad pixel format");
return FALSE;
}
// We don't support overlay planes:
if (pMCDRc->iLayerPlane)
return FALSE;
pRc = pMCDRc->pvUser = (DEVRC *)MCDAlloc(sizeof(DEVRC));
if (!pRc) {
MCDBG_PRINT("MCDrvCreateContext: couldn't allocate DEVRC");
return FALSE;
}
zEnabled = (pMCDRc->iPixelFormat - 1) >= (TOTAL_PIXEL_FORMATS / 2);
doubleBufferEnabled = ((pMCDRc->iPixelFormat - 1) % (TOTAL_PIXEL_FORMATS / 2) ) >=
(TOTAL_PIXEL_FORMATS / 4);
pRc->zBufEnabled = zEnabled;
pRc->backBufEnabled = doubleBufferEnabled;
switch (ppdev->iBitmapFormat) {
default:
case BMF_8BPP:
pDrvPixelFormat = &drvFormats[0];
pRc->hwBpp = 1;
break;
case BMF_16BPP:
if (ppdev->flGreen != 0x7e0) // not 565
pDrvPixelFormat = &drvFormats[1];
else
pDrvPixelFormat = &drvFormats[2];
pRc->hwBpp = 2;
break;
case BMF_24BPP: // The Millenium doesn't do 3D at 24bpp!
MCDFree(pMCDRc->pvUser);
pMCDRc->pvUser = NULL;
MCDBG_PRINT("MCDrvCreateContext: device doesn't support 24 bpp");
return FALSE;
case BMF_32BPP:
pDrvPixelFormat = &drvFormats[4];
pRc->hwBpp = 4;
break;
}
pRc->pixelFormat = *pDrvPixelFormat;
// If we're not yet tracking this window, allocate the per-window DEVWND
// structure for maintaining per-window info such as front/back/z buffer
// resources:
if (!pMCDWnd->pvUser) {
pDevWnd = pMCDWnd->pvUser = (DEVWND *)MCDAlloc(sizeof(DEVWND));
if (!pDevWnd) {
MCDFree(pMCDRc->pvUser);
pMCDRc->pvUser = NULL;
MCDBG_PRINT("MCDrvCreateContext: couldn't allocate DEVWND");
return FALSE;
}
pDevWnd->createFlags = pMCDRc->createFlags;
pDevWnd->iPixelFormat = pMCDRc->iPixelFormat;
pDevWnd->dispUnique = GetDisplayUniqueness(ppdev);
} else {
// We already have a per-window DEVWND structure tracking this window.
// In this case, do a sanity-check on the pixel format for this
// context, since a window's pixel format can not changed once it has
// set (by the first context bound to the window). So, if the pixel
// format for the incoming context doesn't match the current pixel
// format for the window, we have to fail context creation:
pDevWnd = pMCDWnd->pvUser;
if (pDevWnd->iPixelFormat != pMCDRc->iPixelFormat) {
MCDFree(pMCDRc->pvUser);
pMCDRc->pvUser = NULL;
MCDBG_PRINT("MCDrvCreateContext: mismatched pixel formats, window = %d, context = %d",
pDevWnd->iPixelFormat, pMCDRc->iPixelFormat);
return FALSE;
}
}
pRc->pEnumClip = pMCDSurface->pWnd->pClip;
// Set up our color scale values so that color components are
// normalized to 0..7fffff
// We also need to make sure we don't fault due to bad FL data as well...
try {
if (pRcInfo->redScale != (MCDFLOAT)0.0)
pRc->rScale = (MCDFLOAT)(0x7fffff) / pRcInfo->redScale;
else
pRc->rScale = (MCDFLOAT)0.0;
if (pRcInfo->greenScale != (MCDFLOAT)0.0)
pRc->gScale = (MCDFLOAT)(0x7fffff) / pRcInfo->greenScale;
else
pRc->gScale = (MCDFLOAT)0.0;
if (pRcInfo->blueScale != (MCDFLOAT)0.0)
pRc->bScale = (MCDFLOAT)(0x7fffff) / pRcInfo->blueScale;
else
pRc->bScale = (MCDFLOAT)0.0;
// Normalize alpha to 0..ff0000
if (pRcInfo->alphaScale != (MCDFLOAT)0.0)
pRc->aScale = (MCDFLOAT)(0xff0000) / pRcInfo->alphaScale;
else
pRc->aScale = (MCDFLOAT)0.0;
} except (EXCEPTION_EXECUTE_HANDLER) {
MCDBG_PRINT("!!Exception in MCDrvCreateContext!!");
return FALSE;
}
pRc->zScale = (MCDFLOAT)32767.0;
pRc->pickNeeded = TRUE; // We'll definitely need to re-pick
// our rendering functions
pRc->bRGBMode = TRUE; // We only support RGB mode
pRc->zero = __MCDZERO;
// Initialize the pColor pointer in the clip buffer:
for (i = 0, pv = &pRc->clipTemp[0],
maxVi = sizeof(pRc->clipTemp) / sizeof(MCDVERTEX);
i < maxVi; i++, pv++) {
pv->pColor = &pv->colors[__MCD_FRONTFACE];
}
// Set up those rendering functions which are state-invariant:
pRc->clipLine = __MCDClipLine;
pRc->clipTri = __MCDClipTriangle;
pRc->clipPoly = __MCDClipPolygon;
pRc->doClippedPoly = __MCDDoClippedPolygon;
pRc->beginPointDrawing = __MCDPointBegin;
pRc->beginLineDrawing = __MCDLineBegin;
pRc->endLineDrawing = __MCDLineEnd;
pRc->viewportXAdjust = pRcInfo->viewportXAdjust;
pRc->viewportYAdjust = pRcInfo->viewportYAdjust;
#ifdef TEST_REQ_FLAGS
pRcInfo->requestFlags = MCDRCINFO_NOVIEWPORTADJUST |
MCDRCINFO_Y_LOWER_LEFT |
MCDRCINFO_DEVCOLORSCALE |
MCDRCINFO_DEVZSCALE;
pRcInfo->redScale = (MCDFLOAT)1.0;
pRcInfo->greenScale = (MCDFLOAT)1.0;
pRcInfo->blueScale = (MCDFLOAT)1.0;
pRcInfo->alphaScale = (MCDFLOAT)1.0;
pRcInfo->zScale = 0.99991;
#endif
return TRUE;
}
ULONG MCDrvDeleteContext(MCDRC *pRc, DHPDEV dhpdev)
{
// MCDBG_PRINT("MCDrvDeleteContext");
if (pRc->pvUser) {
MCDFree(pRc->pvUser);
pRc->pvUser = NULL;
}
return (ULONG)TRUE;
}
ULONG MCDrvAllocBuffers(MCDSURFACE *pMCDSurface, MCDRC *pMCDRc)
{
DEVRC *pRc = (DEVRC *)pMCDRc->pvUser;
MCDWINDOW *pMCDWnd = pMCDSurface->pWnd;
DEVWND *pDevWnd = (DEVWND *)(pMCDSurface->pWnd->pvUser);
BOOL bZBuffer = (pDevWnd->pohZBuffer != NULL);
BOOL bBackBuffer = (pDevWnd->pohBackBuffer != NULL);
// MCDBG_PRINT("MCDrvAllocBuffers");
// Reject the call if we've already done an allocation for this window:
if ((bZBuffer || bBackBuffer) &&
((DEVWND *)pMCDWnd->pvUser)->dispUnique == GetDisplayUniqueness((PDEV *)pMCDSurface->pso->dhpdev)) {
// MCDBG_PRINT("MCDrvAllocBuffer: warning-attemp to allocate buffers \
//without a matching free");
return (bZBuffer == pRc->zBufEnabled) &&
(bBackBuffer == pRc->backBufEnabled);
}
// Update the display resolution uniqueness for this window:
((DEVWND *)pMCDWnd->pvUser)->dispUnique = GetDisplayUniqueness((PDEV *)pMCDSurface->pso->dhpdev);
return (ULONG)HWAllocResources(pMCDSurface->pWnd, pMCDSurface->pso,
pRc->zBufEnabled, pRc->backBufEnabled);
}
ULONG MCDrvGetBuffers(MCDSURFACE *pMCDSurface, MCDRC *pMCDRc,
MCDBUFFERS *pMCDBuffers)
{
MCDWINDOW *pMCDWnd = pMCDSurface->pWnd;
DEVWND *pDevWnd = (DEVWND *)(pMCDSurface->pWnd->pvUser);
PDEV *ppdev = (PDEV *)pMCDSurface->pso->dhpdev;
// MCDBG_PRINT("MCDrvGetBuffers");
if (pMCDRc) {
MCD_CHECK_BUFFERS_VALID(pMCDSurface, (DEVRC *)pMCDRc->pvUser, FALSE);
} else {
MCD_CHECK_DEVWND(pMCDSurface, pDevWnd, FALSE);
}
pMCDBuffers->mcdFrontBuf.bufFlags = MCDBUF_ENABLED;
pMCDBuffers->mcdFrontBuf.bufOffset =
(pMCDWnd->clientRect.top * ppdev->lDelta) +
(pMCDWnd->clientRect.left * ppdev->cjHwPel);
pMCDBuffers->mcdFrontBuf.bufStride = ppdev->lDelta;
if (pDevWnd->bValidBackBuffer) {
pMCDBuffers->mcdBackBuf.bufFlags = MCDBUF_ENABLED;
if ((ppdev->cDoubleBufferRef == 1) || (pMCDWnd->pClip->c == 1))
pMCDBuffers->mcdBackBuf.bufFlags |= MCDBUF_NOCLIP;
} else {
pMCDBuffers->mcdBackBuf.bufFlags = 0;
}
if (ppdev->pohBackBuffer == pDevWnd->pohBackBuffer) {
pMCDBuffers->mcdBackBuf.bufOffset =
(pMCDWnd->clientRect.top * ppdev->lDelta) +
(pMCDWnd->clientRect.left * ppdev->cjHwPel) +
pDevWnd->backBufferOffset;
} else {
pMCDBuffers->mcdBackBuf.bufOffset =
(pMCDWnd->clientRect.left * ppdev->cjHwPel) +
pDevWnd->backBufferOffset;
}
pMCDBuffers->mcdBackBuf.bufStride = ppdev->lDelta;
if (pDevWnd->bValidZBuffer) {
pMCDBuffers->mcdDepthBuf.bufFlags = MCDBUF_ENABLED;
if ((ppdev->cZBufferRef == 1) || (pMCDWnd->pClip->c == 1))
pMCDBuffers->mcdDepthBuf.bufFlags |= MCDBUF_NOCLIP;
} else {
pMCDBuffers->mcdDepthBuf.bufFlags = 0;
}
if (ppdev->pohZBuffer == pDevWnd->pohZBuffer) {
pMCDBuffers->mcdDepthBuf.bufOffset =
((pMCDWnd->clientRect.top * ppdev->cxMemory) +
pMCDWnd->clientRect.left) * 2 +
pDevWnd->zBufferOffset;
} else {
pMCDBuffers->mcdDepthBuf.bufOffset =
(pMCDWnd->clientRect.left * 2) + pDevWnd->zBufferOffset;
}
// The pointer to the start of the frame buffer is adjusted for ulYDstOrg,
// so we have to redo that adjustment for the depth buffer:
if (ppdev->ulYDstOrg) {
pMCDBuffers->mcdDepthBuf.bufOffset +=
(ppdev->ulYDstOrg * 2) - (ppdev->ulYDstOrg * ppdev->cjHwPel);
}
pMCDBuffers->mcdDepthBuf.bufStride = ppdev->cxMemory * 2;
return (ULONG)TRUE;
}
ULONG MCDrvCreateMem(MCDSURFACE *pMCDSurface, MCDMEM *pMCDMem)
{
// MCDBG_PRINT("MCDrvCreateMem");
return (ULONG)TRUE;
}
ULONG MCDrvDeleteMem(MCDMEM *pMCDMem, DHPDEV dhpdev)
{
// MCDBG_PRINT("MCDrvDeleteMem");
return (ULONG)TRUE;
}
ULONG_PTR MCDrvDraw(MCDSURFACE *pMCDSurface, MCDRC *pMCDRc, MCDMEM *prxExecMem,
UCHAR *pStart, UCHAR *pEnd)
{
MCDCOMMAND *pCmd = (MCDCOMMAND *)pStart;
MCDCOMMAND *pCmdNext;
DEVRC *pRc = (DEVRC *)pMCDRc->pvUser;
DEVWND *pDevWnd = (DEVWND *)(pMCDSurface->pWnd->pvUser);
CHOP_ROUND_ON();
#if TEST_3D_NO_DRAW
CHOP_ROUND_OFF();
return (ULONG)0;
#endif
// MCDBG_PRINT("MCDrvDraw");
// Make sure we have both a valid RC and window structure:
if (!pRc || !pDevWnd)
goto DrawExit;
pRc->ppdev = (PDEV *)pMCDSurface->pso->dhpdev;
#if FAIL_ALL_DRAWING
goto DrawExit;
#endif
//
// If the resolution has changed and we have not yet updated our
// buffers, fail the call gracefully since the client won't be
// able to perform any software simulations at this point either.
// This applies to any of the other drawing functions as well (such
// as spans and clears).
//
if (pDevWnd->dispUnique != GetDisplayUniqueness(pRc->ppdev)) {
MCDBG_PRINT("MCDrvDraw: invalid (changed) resolution");
CHOP_ROUND_OFF();
return (ULONG)0;
}
if ((pRc->zBufEnabled && !pDevWnd->bValidZBuffer) ||
(pRc->backBufEnabled && !pDevWnd->bValidBackBuffer)) {
MCDBG_PRINT("MCDrvDraw has invalid buffers");
goto DrawExit;
}
// re-pick the rendering functions if we've have a state change:
if (pRc->pickNeeded) {
__MCDPickRenderingFuncs(pRc, pDevWnd);
__MCDPickClipFuncs(pRc);
pRc->pickNeeded = FALSE;
}
// If we're completely clipped, return success:
pRc->pEnumClip = pMCDSurface->pWnd->pClip;
if (!pRc->pEnumClip->c) {
CHOP_ROUND_OFF();
return (ULONG)0;
}
// return here if we can't draw any primitives:
if (pRc->allPrimFail) {
goto DrawExit;
}
// Set these up in the device's RC so we can just pass a single pointer
// to do everything:
pRc->pMCDSurface = pMCDSurface;
pRc->pMCDRc = pMCDRc;
pRc->xOffset = pMCDSurface->pWnd->clientRect.left -
pRc->viewportXAdjust;
pRc->yOffset = (pMCDSurface->pWnd->clientRect.top -
pMCDSurface->pWnd->clipBoundsRect.top) -
pRc->viewportYAdjust;
pRc->pMemMin = pStart;
pRc->pvProvoking = (MCDVERTEX *)pStart; // bulletproofing
pRc->pMemMax = pEnd - sizeof(MCDVERTEX);
// warm up the hardware for drawing primitives:
HW_INIT_DRAWING_STATE(pMCDSurface, pMCDSurface->pWnd, pRc);
HW_INIT_PRIMITIVE_STATE(pMCDSurface, pRc);
// If we have a single clipping rectangle, set it up in the hardware once
// for this batch:
if (pRc->pEnumClip->c == 1)
(*pRc->HWSetupClipRect)(pRc, &pRc->pEnumClip->arcl[0]);
// Now, loop through the commands and process the batch:
try {
while (pCmd && (UCHAR *)pCmd < pEnd) {
volatile ULONG command = pCmd->command;
// Make sure we can read at least the command header:
if ((pEnd - (UCHAR *)pCmd) < sizeof(MCDCOMMAND))
goto DrawExit;
if (command <= GL_POLYGON) {
if (pCmd->flags & MCDCOMMAND_RENDER_PRIMITIVE)
pCmdNext = (*pRc->primFunc[command])(pRc, pCmd);
else
pCmdNext = pCmd->pNextCmd;
if (pCmdNext == pCmd)
goto DrawExit; // primitive failed
if (!(pCmd = pCmdNext)) { // we're done with the batch
CHOP_ROUND_OFF();
HW_DEFAULT_STATE(pMCDSurface);
#if FORCE_SYNC
HW_WAIT_DRAWING_DONE(pRc);
#endif
return (ULONG)0;
}
}
}
} except (EXCEPTION_EXECUTE_HANDLER) {
MCDBG_PRINT("!!Exception in MCDrvDraw!!");
CHOP_ROUND_OFF();
HW_DEFAULT_STATE(pMCDSurface);
HW_WAIT_DRAWING_DONE(pRc);
return (ULONG_PTR)pCmd;
}
DrawExit:
CHOP_ROUND_OFF();
// restore the hardware state:
HW_DEFAULT_STATE(pMCDSurface);
HW_WAIT_DRAWING_DONE(pRc);
return (ULONG_PTR)pCmd; // some sort of overrun has occurred
}
ULONG MCDrvClear(MCDSURFACE *pMCDSurface, MCDRC *pMCDRc, ULONG buffers)
{
DEVRC *pRc = (DEVRC *)pMCDRc->pvUser;
MCDWINDOW *pWnd;
ULONG cClip;
RECTL *pClip;
// MCDBG_PRINT("MCDrvClear");
MCD_CHECK_RC(pRc);
pWnd = pMCDSurface->pWnd;
MCD_CHECK_BUFFERS_VALID(pMCDSurface, pRc, TRUE);
pRc->ppdev = (PDEV *)pMCDSurface->pso->dhpdev;
#if FAIL_ALL_DRAWING && OKOK
{
HW_WAIT_DRAWING_DONE(pRc);
return FALSE;
}
#endif
if (buffers & ~(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT |
GL_ACCUM_BUFFER_BIT | GL_STENCIL_BUFFER_BIT)) {
HW_WAIT_DRAWING_DONE(pRc);
return FALSE;
}
if ((buffers & GL_DEPTH_BUFFER_BIT) && (!pRc->zBufEnabled))
{
MCDBG_PRINT("MCDrvClear: clear z requested with z-buffer disabled.");
HW_WAIT_DRAWING_DONE(pRc);
return FALSE;
}
if (buffers & (GL_ACCUM_BUFFER_BIT | GL_STENCIL_BUFFER_BIT)) {
HW_WAIT_DRAWING_DONE(pRc);
return FALSE;
}
// Return if we have nothing to clear:
if (!(cClip = pWnd->pClip->c))
return TRUE;
// Initialize hardware state for filling operation:
HW_INIT_DRAWING_STATE(pMCDSurface, pMCDSurface->pWnd, pRc);
// We have to protect against bad clear colors since this can
// potentially cause an FP exception:
try {
HW_START_FILL_RECT(pMCDSurface, pMCDRc, pRc, buffers);
} except (EXCEPTION_EXECUTE_HANDLER) {
MCDBG_PRINT("!!Exception in MCDrvClear!!");
return FALSE;
}
for (pClip = &pWnd->pClip->arcl[0]; cClip; cClip--,
pClip++)
{
// Do the fill:
HW_FILL_RECT(pMCDSurface, pRc, pClip);
}
HW_DEFAULT_STATE(pMCDSurface);
#if FORCE_SYNC
HW_WAIT_DRAWING_DONE(pRc);
#endif
return (ULONG)TRUE;
}
ULONG MCDrvSwap(MCDSURFACE *pMCDSurface, ULONG flags)
{
MCDWINDOW *pWnd;
ULONG cClip;
RECTL *pClip;
POINTL ptSrc;
ULONG vCount, vCountLast;
ULONG scanTarget;
PDEV *ppdev = (PDEV *)pMCDSurface->pso->dhpdev;
ULONG scanMax;
ULONG maxScanOffset;
DEVWND *pDevWnd = (DEVWND *)(pMCDSurface->pWnd->pvUser);
LONG hwBufferYBias;
// MCDBG_PRINT("MCDrvSwap");
pWnd = pMCDSurface->pWnd;
// If we're not tracking this window, just return...
if (!pWnd) {
MCDBG_PRINT("MCDrvSwap: trying to swap an untracked window");\
return FALSE;
}
if (!pDevWnd) {
MCDBG_PRINT("MCDrvSwap: NULL buffers.");\
return FALSE;
}
if (!pDevWnd->bValidBackBuffer) {
MCDBG_PRINT("MCDrvSwap: back buffer invalid");
return FALSE;
}
if (pDevWnd->dispUnique != GetDisplayUniqueness(ppdev)) {
MCDBG_PRINT("MCDrvSwap: resolution changed but not updated");
return FALSE;
}
// Just return if we have nothing to swap:
//
// - no visible rectangle
// - per-plane swap, but none of the specified planes
// are supported by driver
if (!(cClip = pWnd->pClipUnscissored->c) ||
(flags && !(flags & MCDSWAP_MAIN_PLANE)))
return TRUE;
HW_START_SWAP_BUFFERS(pMCDSurface, &hwBufferYBias, flags);
// Wait for sync if we can do a fast blt:
if ((pDevWnd->createFlags & MCDCONTEXT_SWAPSYNC) &&
((pWnd->clientRect.bottom + pDevWnd->backBufferY) <= (ULONG)ppdev->ayBreak[0])) {
LONG vCount, vCountLast;
LONG scanTarget = pWnd->clientRect.bottom;
LONG scanMax = ppdev->cyScreen - 1;
scanTarget = min(scanTarget, scanMax);
vCount = vCountLast = HW_GET_VCOUNT(ppdev->pjBase);
while ((vCount < scanTarget) && ((vCount - vCountLast) >= 0)) {
vCountLast = vCount;
vCount = HW_GET_VCOUNT(ppdev->pjBase);
}
}
pClip = &pWnd->pClipUnscissored->arcl[0];
ptSrc.x = pWnd->clipBoundsRect.left;
ptSrc.y = pWnd->clipBoundsRect.top + hwBufferYBias;
// Swap all of the clip rectangles in the backbuffer to the front:
ppdev->xOffset = 0;
ppdev->yOffset = 0;
vMilCopyBlt(ppdev, cClip, pClip, 0xcccc,
&ptSrc, &pWnd->clipBoundsRect);
HW_DEFAULT_STATE(pMCDSurface);
return (ULONG)TRUE;
}
ULONG MCDrvState(MCDSURFACE *pMCDSurface, MCDRC *pMCDRc, MCDMEM *pMCDMem,
UCHAR *pStart, LONG length, ULONG numStates)
{
DEVRC *pRc = (DEVRC *)pMCDRc->pvUser;
MCDSTATE *pState = (MCDSTATE *)pStart;
MCDSTATE *pStateEnd = (MCDSTATE *)(pStart + length);
// MCDBG_PRINT("MCDrvState");
MCD_CHECK_RC(pRc);
while (pState < pStateEnd) {
if (((UCHAR *)pStateEnd - (UCHAR *)pState) < sizeof(MCDSTATE)) {
MCDBG_PRINT("MCDrvState: buffer too small");
return FALSE;
}
switch (pState->state) {
case MCD_RENDER_STATE:
if (((UCHAR *)pState + sizeof(MCDRENDERSTATE)) >
(UCHAR *)pStateEnd)
return FALSE;
memcpy(&pRc->MCDState, &pState->stateValue,
sizeof(MCDRENDERSTATE));
// Flag the fact that we need to re-pick the
// rendering functions:
pRc->pickNeeded = TRUE;
pState = (MCDSTATE *)((UCHAR *)pState + sizeof(MCDSTATE_RENDER));
break;
case MCD_PIXEL_STATE:
// Not accelerated in this driver, so we can ignore this state
// (which implies that we do not need to set the pick flag).
pState = (MCDSTATE *)((UCHAR *)pState + sizeof(MCDSTATE_PIXEL));
break;
case MCD_SCISSOR_RECT_STATE:
// Not needed in this driver, so we can ignore this state
// (which implies that we do not need to set the pick flag).
pState = (MCDSTATE *)((UCHAR *)pState + sizeof(MCDSTATE_SCISSOR_RECT));
break;
default:
MCDBG_PRINT("MCDrvState: Unrecognized state %d.", pState->state);
return FALSE;
}
}
return (ULONG)TRUE;
}
ULONG MCDrvViewport(MCDSURFACE *pMCDSurface, MCDRC *pMCDRc,
MCDVIEWPORT *pMCDViewport)
{
DEVRC *pRc = (DEVRC *)pMCDRc->pvUser;
// MCDBG_PRINT("MCDrvViewport");
MCD_CHECK_RC(pRc);
pRc->MCDViewport = *pMCDViewport;
return (ULONG)TRUE;
}
HDEV MCDrvGetHdev(MCDSURFACE *pMCDSurface)
{
PDEV *ppdev = (PDEV *)pMCDSurface->pso->dhpdev;
// MCDBG_PRINT("MCDrvGetHdev");
return ppdev->hdevEng;
}
ULONG MCDrvSpan(MCDSURFACE *pMCDSurface, MCDRC *pMCDRc, MCDMEM *pMCDMem,
MCDSPAN *pMCDSpan, BOOL bRead)
{
DEVRC *pRc = (DEVRC *)pMCDRc->pvUser;
PDEV *ppdev = (PDEV *)pMCDSurface->pso->dhpdev;
UCHAR *pScreen;
UCHAR *pPixels;
MCDWINDOW *pWnd;
DEVWND *pDevWnd;
LONG xLeftOrg, xLeft, xRight, y;
LONG bufferYBias;
ULONG bytesNeeded;
ULONG cjHwPel;
// MCDBG_PRINT("MCDrvSpan: read %d, (%d, %d) type %d", bRead, pMCDSpan->x, pMCDSpan->y, pMCDSpan->type);
MCD_CHECK_RC(pRc);
pWnd = pMCDSurface->pWnd;
// Return if we have nothing to clip:
if (!pWnd->pClip->c)
return TRUE;
// Fail if number of pixels is negative:
if (pMCDSpan->numPixels < 0) {
MCDBG_PRINT("MCDrvSpan: numPixels < 0");
return FALSE;
}
MCD_CHECK_BUFFERS_VALID(pMCDSurface, pRc, TRUE);
pDevWnd = (DEVWND *)pWnd->pvUser;
xLeft = xLeftOrg = (pMCDSpan->x + pWnd->clientRect.left);
xRight = (xLeft + pMCDSpan->numPixels);
y = pMCDSpan->y + pWnd->clientRect.top;
// Early-out spans which are not visible:
if ((y < pWnd->clipBoundsRect.top) ||
(y >= pWnd->clipBoundsRect.bottom))
return TRUE;
xLeft = max(xLeft, pWnd->clipBoundsRect.left);
xRight = min(xRight, pWnd->clipBoundsRect.right);
// Return if empty:
if (xLeft >= xRight)
return TRUE;
switch (pMCDSpan->type) {
case MCDSPAN_FRONT:
//MCDBG_PRINT("MCDrvSpan: MCDSPAN_FRONT");
cjHwPel = ppdev->cjHwPel;
pScreen = ppdev->pjScreen + (ppdev->ulYDstOrg * cjHwPel);
bytesNeeded = pMCDSpan->numPixels * cjHwPel;
pScreen += ((y * ppdev->lDelta) +
(xLeft * cjHwPel));
break;
case MCDSPAN_BACK:
//MCDBG_PRINT("MCDrvSpan: MCDSPAN_BACK");
cjHwPel = ppdev->cjHwPel;
pScreen = ppdev->pjScreen + (ppdev->ulYDstOrg * cjHwPel);
bytesNeeded = pMCDSpan->numPixels * cjHwPel;
if (ppdev->pohBackBuffer == pDevWnd->pohBackBuffer) {
pScreen += ((y * ppdev->lDelta) +
(xLeft * cjHwPel) +
pDevWnd->backBufferOffset);
} else {
pScreen += (((y - pWnd->clipBoundsRect.top) * ppdev->lDelta) +
(xLeft * cjHwPel) +
pDevWnd->backBufferOffset);
}
break;
case MCDSPAN_DEPTH:
//MCDBG_PRINT("MCDrvSpan: MCDSPAN_DEPTH");
cjHwPel = 2; // Z is always 16bpp
pScreen = ppdev->pjScreen + (ppdev->ulYDstOrg << 1);
bytesNeeded = pMCDSpan->numPixels * 2;
if (ppdev->pohZBuffer == pDevWnd->pohZBuffer) {
pScreen += (((y * ppdev->cxScreen + xLeft) * 2) +
pDevWnd->zBufferOffset);
} else {
pScreen += (((((y - pWnd->clipBoundsRect.top) * ppdev->cxScreen) + xLeft) * 2) +
pDevWnd->zBufferOffset);
}
break;
default:
MCDBG_PRINT("MCDrvReadSpan: Unrecognized buffer %d", pMCDSpan->type);
return FALSE;
}
// Make sure we don't read past the end of the buffer:
if (((char *)pMCDSpan->pPixels + bytesNeeded) >
((char *)pMCDMem->pMemBase + pMCDMem->memSize)) {
MCDBG_PRINT("MCDrvSpan: Buffer too small");
return FALSE;
}
WAIT_NOT_BUSY(ppdev->pjBase);
pPixels = pMCDSpan->pPixels;
if (bRead) {
if (xLeftOrg != xLeft)
pPixels = (UCHAR *)pMCDSpan->pPixels + ((xLeft - xLeftOrg) * cjHwPel);
RtlCopyMemory(pPixels, pScreen, (xRight - xLeft) * cjHwPel);
} else {
LONG xLeftClip, xRightClip, yClip;
RECTL *pClip;
ULONG cClip;
for (pClip = &pWnd->pClip->arcl[0], cClip = pWnd->pClip->c; cClip;
cClip--, pClip++)
{
UCHAR *pScreenClip;
// Test for trivial cases:
if (y < pClip->top)
break;
// Determine trivial rejection for just this span
if ((xLeft >= pClip->right) ||
(y >= pClip->bottom) ||
(xRight <= pClip->left))
continue;
// Intersect current clip rect with the span:
xLeftClip = max(xLeft, pClip->left);
xRightClip = min(xRight, pClip->right);
if (xLeftClip >= xRightClip)
continue;
if (xLeftOrg != xLeftClip)
pPixels = (UCHAR *)pMCDSpan->pPixels +
((xLeftClip - xLeftOrg) * cjHwPel);
pScreenClip = pScreen + ((xLeftClip - xLeft) * cjHwPel);
// Write the span:
RtlCopyMemory(pScreenClip, pPixels, (xRightClip - xLeftClip) * cjHwPel);
}
}
return (ULONG)TRUE;
}
VOID MCDrvTrackWindow(WNDOBJ *pWndObj, MCDWINDOW *pMCDWnd, ULONG flags)
{
// MCDBG_PRINT("MCDrvTrackWindow");
SURFOBJ *pso = pWndObj->psoOwner;
//
// Note: pMCDWnd is NULL for surface notifications, so if needed
// they should be handled before this check:
//
if (!pMCDWnd)
return;
if (!pMCDWnd->pvUser) {
MCDBG_PRINT("MCDrvTrackWindow: NULL pDevWnd");
return;
}
switch (flags) {
case WOC_DELETE:
//MCDBG_PRINT("MCDrvTrackWindow: WOC_DELETE");
// If the display resoultion has changed, the resources we had
// bound to the tracked window are gone, so don't try to delete
// the back- and z-buffer resources which are no longer present:
if (((DEVWND *)pMCDWnd->pvUser)->dispUnique ==
GetDisplayUniqueness((PDEV *)pso->dhpdev))
HWFreeResources(pMCDWnd, pso);
MCDFree((VOID *)pMCDWnd->pvUser);
pMCDWnd->pvUser = NULL;
break;
case WOC_RGN_CLIENT:
// The resources we had bound to the tracked window have moved,
// so update them:
{
DEVWND *pWnd = (DEVWND *)pMCDWnd->pvUser;
BOOL bZBuffer = (pWnd->pohZBuffer != NULL);
BOOL bBackBuffer = (pWnd->pohBackBuffer != NULL);
PDEV *ppdev = (PDEV *)pso->dhpdev;
ULONG height = pMCDWnd->clientRect.bottom - pMCDWnd->clientRect.top;
BOOL bWindowBuffer = (bZBuffer && (pWnd->pohZBuffer != ppdev->pohZBuffer)) ||
(bBackBuffer && (pWnd->pohBackBuffer != ppdev->pohBackBuffer));
// If the window is using a window-sized back/z resource,
// we need to reallocate it if there has been a size change:
if (pWnd->dispUnique == GetDisplayUniqueness(ppdev)) {
if ((height != pWnd->allocatedBufferHeight) &&
(bWindowBuffer)) {
HWFreeResources(pMCDWnd, pso);
HWAllocResources(pMCDWnd, pso, bZBuffer, bBackBuffer);
}
} else {
// In this case, the display has been re-initialized due
// to some event such as a resolution change, so we need
// to create our buffes from scratch:
pWnd->dispUnique = GetDisplayUniqueness((PDEV *)pso->dhpdev);
HWAllocResources(pMCDWnd, pso, bZBuffer, bBackBuffer);
}
}
break;
default:
break;
}
return;
}
ULONG MCDrvBindContext(MCDSURFACE *pMCDSurface, MCDRC *pMCDRc)
{
DEVWND *pDevWnd = (DEVWND *)(pMCDSurface->pWnd->pvUser);
PDEV *ppdev = (PDEV *)pMCDSurface->pso->dhpdev;
// OK, this is a new binding, so create the per-window structure and
// set the pixel format:
if (!pDevWnd) {
pDevWnd = pMCDSurface->pWnd->pvUser = (DEVWND *)MCDAlloc(sizeof(DEVWND));
if (!pDevWnd) {
MCDBG_PRINT("MCDrvBindContext: couldn't allocate DEVWND");
return FALSE;
}
pDevWnd->createFlags = pMCDRc->createFlags;
pDevWnd->iPixelFormat = pMCDRc->iPixelFormat;
pDevWnd->dispUnique = GetDisplayUniqueness(ppdev);
return TRUE;
}
if (pMCDRc->iPixelFormat != pDevWnd->iPixelFormat) {
MCDBG_PRINT("MCDrvBindContext: tried to bind unmatched pixel formats");
return FALSE;
}
HWUpdateBufferPos(pMCDSurface->pWnd, pMCDSurface->pso, TRUE);
return TRUE;
}
ULONG MCDrvSync(MCDSURFACE *pMCDSurface, MCDRC *pMCDRc)
{
DEVRC *pRc = (DEVRC *)pMCDRc->pvUser;
pRc->ppdev = (PDEV *)pMCDSurface->pso->dhpdev;
HW_WAIT_DRAWING_DONE(pRc);
return TRUE;
}
ULONG MCDrvCreateTexture(MCDSURFACE *pMCDSurface, MCDRC *pRc, MCDTEXTURE *pTex)
{
//MCDBG_PRINT("MCDrvCreateTexture");
#ifdef TEST_TEXTURE
pTex->textureKey = 0x1000;
return 1;
#else
return 0;
#endif
}
ULONG MCDrvUpdateSubTexture(MCDSURFACE *pMCDSurface, MCDRC *pRc,
MCDTEXTURE *pTex, ULONG lod, RECTL *pRect)
{
//MCDBG_PRINT("MCDrvUpdateSubTexture");
return TRUE;
}
ULONG MCDrvUpdateTexturePalette(MCDSURFACE *pMCDSurface, MCDRC *pRc,
MCDTEXTURE *pTex, ULONG start,
ULONG numEntries)
{
//MCDBG_PRINT("MCDrvUpdateTexturePalette");
return TRUE;
}
ULONG MCDrvUpdateTexturePriority(MCDSURFACE *pMCDSurface, MCDRC *pRc,
MCDTEXTURE *pTex)
{
//MCDBG_PRINT("MCDrvUpdateTexturePriority");
return TRUE;
}
ULONG MCDrvUpdateTextureState(MCDSURFACE *pMCDSurface, MCDRC *pRc,
MCDTEXTURE *pTex)
{
//MCDBG_PRINT("MCDrvUpdateTextureState");
return TRUE;
}
ULONG MCDrvTextureStatus(MCDSURFACE *pMCDSurface, MCDRC *pRc,
MCDTEXTURE *pTex)
{
//MCDBG_PRINT("MCDrvTextureStatus");
return MCDRV_TEXTURE_RESIDENT;
}
ULONG MCDrvDeleteTexture(MCDTEXTURE *pTex, DHPDEV dhpdev)
{
//MCDBG_PRINT("MCDrvDeleteTexture");
return TRUE;
}
ULONG MCDrvDrawPixels(MCDSURFACE *pMcdSurface, MCDRC *pRc,
ULONG width, ULONG height, ULONG format,
ULONG type, VOID *pPixels, BOOL packed)
{
//MCDBG_PRINT("MCDrvDrawPixels");
return FALSE;
}
ULONG MCDrvReadPixels(MCDSURFACE *pMcdSurface, MCDRC *pRc,
LONG x, LONG y, ULONG width, ULONG height,
ULONG format, ULONG type, VOID *pPixels)
{
//MCDBG_PRINT("MCDrvReadPixels");
return FALSE;
}
ULONG MCDrvCopyPixels(MCDSURFACE *pMcdSurface, MCDRC *pRc,
LONG x, LONG y, ULONG width, ULONG height, ULONG type)
{
//MCDBG_PRINT("MCDrvCopyPixels");
return FALSE;
}
ULONG MCDrvPixelMap(MCDSURFACE *pMcdSurface, MCDRC *pRc,
ULONG mapType, ULONG mapSize, VOID *pMap)
{
//MCDBG_PRINT("MCDrvPixelMap");
return TRUE;
}
BOOL MCDrvGetEntryPoints(MCDSURFACE *pMCDSurface, MCDDRIVER *pMCDDriver)
{
if (pMCDDriver->ulSize < sizeof(MCDDRIVER))
return FALSE;
pMCDDriver->pMCDrvInfo = MCDrvInfo;
pMCDDriver->pMCDrvDescribePixelFormat = MCDrvDescribePixelFormat;
pMCDDriver->pMCDrvDescribeLayerPlane = MCDrvDescribeLayerPlane;
pMCDDriver->pMCDrvSetLayerPalette = MCDrvSetLayerPalette;
pMCDDriver->pMCDrvCreateContext = MCDrvCreateContext;
pMCDDriver->pMCDrvDeleteContext = MCDrvDeleteContext;
pMCDDriver->pMCDrvCreateTexture = MCDrvCreateTexture;
pMCDDriver->pMCDrvDeleteTexture = MCDrvDeleteTexture;
pMCDDriver->pMCDrvCreateMem = MCDrvCreateMem;
pMCDDriver->pMCDrvDeleteMem = MCDrvDeleteMem;
pMCDDriver->pMCDrvDraw = MCDrvDraw;
pMCDDriver->pMCDrvClear = MCDrvClear;
pMCDDriver->pMCDrvSwap = MCDrvSwap;
pMCDDriver->pMCDrvState = MCDrvState;
pMCDDriver->pMCDrvViewport = MCDrvViewport;
pMCDDriver->pMCDrvGetHdev = MCDrvGetHdev;
pMCDDriver->pMCDrvSpan = MCDrvSpan;
pMCDDriver->pMCDrvTrackWindow = MCDrvTrackWindow;
pMCDDriver->pMCDrvAllocBuffers = MCDrvAllocBuffers;
pMCDDriver->pMCDrvGetBuffers = MCDrvGetBuffers;
pMCDDriver->pMCDrvBindContext = MCDrvBindContext;
pMCDDriver->pMCDrvSync = MCDrvSync;
pMCDDriver->pMCDrvCreateTexture = MCDrvCreateTexture;
pMCDDriver->pMCDrvDeleteTexture = MCDrvDeleteTexture;
pMCDDriver->pMCDrvUpdateSubTexture = MCDrvUpdateSubTexture;
pMCDDriver->pMCDrvUpdateTexturePalette = MCDrvUpdateTexturePalette;
pMCDDriver->pMCDrvUpdateTexturePriority = MCDrvUpdateTexturePriority;
pMCDDriver->pMCDrvUpdateTextureState = MCDrvUpdateTextureState;
pMCDDriver->pMCDrvTextureStatus = MCDrvTextureStatus;
pMCDDriver->pMCDrvDrawPixels = MCDrvDrawPixels;
pMCDDriver->pMCDrvReadPixels = MCDrvReadPixels;
pMCDDriver->pMCDrvCopyPixels = MCDrvCopyPixels;
pMCDDriver->pMCDrvPixelMap = MCDrvPixelMap;
return TRUE;
}
/******************************Public*Routine******************************\
* VOID vAssertModeMCD
*
* This function is called by enable.c when entering or leaving the
* DOS full-screen character mode.
*
\**************************************************************************/
VOID vAssertModeMCD(
PDEV* ppdev,
BOOL bEnabled)
{
}
/******************************Public*Routine******************************\
* BOOL bEnableMCD
*
* This function is called by enable.c when the mode is first initialized,
* right after the miniport does the mode-set.
*
\**************************************************************************/
BOOL bEnableMCD(
PDEV* ppdev)
{
return(TRUE);
}
/******************************Public*Routine******************************\
* VOID vDisableMCD
*
* This function is called by enable.c when the driver is shutting down.
*
\**************************************************************************/
VOID vDisableMCD(
PDEV* ppdev)
{
if (ppdev->hMCD)
{
EngUnloadImage(ppdev->hMCD);
}
}
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