summaryrefslogtreecommitdiff
path: root/src/cir_dga.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/cir_dga.c')
-rw-r--r--src/cir_dga.c256
1 files changed, 256 insertions, 0 deletions
diff --git a/src/cir_dga.c b/src/cir_dga.c
new file mode 100644
index 0000000..7677160
--- /dev/null
+++ b/src/cir_dga.c
@@ -0,0 +1,256 @@
+/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/cirrus/cir_dga.c,v 1.7 2001/10/01 13:44:05 eich Exp $ */
+/*
+ * Copyright 2000 by Egbert Eich
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Alan Hourihane not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission. Alan Hourihane makes no representations
+ * about the suitability of this software for any purpose. It is provided
+ * "as is" without express or implied warranty.
+ *
+ * EGBERT EICH DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL ALAN HOURIHANE BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Authors: Adapted from: Alan Hourihane, <alanh@fairlite.demon.co.uk>
+ * by: Egbert Eich
+ */
+
+#include "xf86.h"
+#include "xf86_OSproc.h"
+#include "xf86_ansic.h"
+#include "xf86Pci.h"
+#include "xf86PciInfo.h"
+#include "xaa.h"
+#include "xaalocal.h"
+#include "vgaHW.h"
+#include "cir.h"
+#include "dgaproc.h"
+
+static Bool Cir_OpenFramebuffer(ScrnInfoPtr, char **, unsigned char **,
+ int *, int *, int *);
+static Bool Cir_SetMode(ScrnInfoPtr, DGAModePtr);
+static void Cir_Sync(ScrnInfoPtr);
+static int Cir_GetViewport(ScrnInfoPtr);
+static void Cir_SetViewport(ScrnInfoPtr, int, int, int);
+static void Cir_FillRect(ScrnInfoPtr, int, int, int, int, unsigned long);
+static void Cir_BlitRect(ScrnInfoPtr, int, int, int, int, int, int);
+/*
+static void Cir_BlitTransRect(ScrnInfoPtr, int, int, int, int, int, int,
+ unsigned long);
+*/
+
+static
+DGAFunctionRec CirDGAFuncs = {
+ Cir_OpenFramebuffer,
+ NULL, /* Cir_CloseFramebuffer */
+ Cir_SetMode,
+ Cir_SetViewport,
+ Cir_GetViewport,
+ Cir_Sync,
+ Cir_FillRect,
+ Cir_BlitRect,
+ NULL /* Cir_BlitTransRect */
+};
+
+
+
+
+Bool
+CirDGAInit(ScreenPtr pScreen)
+{
+ ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
+ CirPtr pCir = CIRPTR(pScrn);
+ DGAModePtr modes = NULL, newmodes = NULL, currentMode;
+ DisplayModePtr pMode, firstMode;
+ int Bpp = pScrn->bitsPerPixel >> 3;
+ int num = 0;
+ int imlines = (pScrn->videoRam * 1024) /
+ (pScrn->displayWidth * (pScrn->bitsPerPixel >> 3));
+
+
+ if (!pCir->DGAnumModes) {
+ pMode = firstMode = pScrn->modes;
+ while (pMode) {
+ newmodes = xrealloc(modes, (num + 1) * sizeof (DGAModeRec));
+ if (!newmodes) {
+ xfree(modes);
+ return FALSE;
+ }
+ modes = newmodes;
+ currentMode = modes + num;
+ num++;
+ (void)memset(currentMode, 1, sizeof(DGAModeRec));
+ currentMode->mode = pMode;
+ currentMode->flags = DGA_PIXMAP_AVAILABLE
+ | ((!pCir->NoAccel) ? (DGA_FILL_RECT | DGA_BLIT_RECT) : 0);
+ if (pMode->Flags & V_DBLSCAN)
+ currentMode->flags |= DGA_DOUBLESCAN;
+ if(pMode->Flags & V_INTERLACE)
+ currentMode->flags |= DGA_INTERLACED;
+ currentMode->byteOrder = pScrn->imageByteOrder;
+ currentMode->depth = pScrn->depth;
+ currentMode->bitsPerPixel = pScrn->bitsPerPixel;
+ currentMode->red_mask = pScrn->mask.red;
+ currentMode->green_mask = pScrn->mask.green;
+ currentMode->blue_mask = pScrn->mask.blue;
+ currentMode->visualClass = (Bpp == 1) ? PseudoColor : TrueColor;
+ currentMode->viewportWidth = pMode->HDisplay;
+ currentMode->viewportHeight = pMode->VDisplay;
+ currentMode->xViewportStep = 1; /* The granularity of x and y pos. */
+ currentMode->yViewportStep = 1;
+ currentMode->viewportFlags = 0 /*DGA_FLIP_RETRACE*/;
+ currentMode->offset = 0;
+ currentMode->address = pCir->FbBase;
+ currentMode->bytesPerScanline = ((pScrn->displayWidth * Bpp) + 3) & ~3L;
+ currentMode->pixmapWidth = currentMode->imageWidth
+ = pScrn->displayWidth;
+ currentMode->pixmapHeight = currentMode->imageHeight = imlines;
+ currentMode->maxViewportX = currentMode->imageWidth -
+ currentMode->viewportWidth;
+ /* this might need to get clamped to some maximum */
+ currentMode->maxViewportY = currentMode->imageHeight -
+ currentMode->viewportHeight;
+
+ pMode = pMode->next;
+ if(pMode == firstMode)
+ break;
+ }
+ pCir->DGAnumModes = num;
+ pCir->DGAModes = modes;
+ }
+ return DGAInit(pScreen, &CirDGAFuncs, pCir->DGAModes, pCir->DGAnumModes);
+}
+
+static Bool
+Cir_OpenFramebuffer(
+ ScrnInfoPtr pScrn,
+ char **name,
+ unsigned char **mem,
+ int *size,
+ int *offset,
+ int *flags
+){
+ CirPtr pCir = CIRPTR(pScrn);
+
+ *name = NULL; /* no special device */
+ *mem = (unsigned char*)(long)pCir->FbAddress;
+ *size = pCir->FbMapSize;
+ *offset = 0; /* Always */
+ *flags = 0; /* Root permissions OS-dependent */
+
+ return TRUE;
+}
+
+
+static Bool
+Cir_SetMode(
+ ScrnInfoPtr pScrn,
+ DGAModePtr pMode
+){
+ CirPtr pCir = CIRPTR(pScrn);
+ static int OldDisplayWidth[MAXSCREENS];
+ int index = pScrn->pScreen->myNum;
+ Bool ret = FALSE;
+
+ if(!pMode) { /* restore the original mode */
+ /* put the ScreenParameters back */
+ pScrn->displayWidth = OldDisplayWidth[index];
+ ret = pCir->DGAModeInit(xf86Screens[index], pScrn->currentMode);
+ pCir->DGAactive = FALSE;
+ } else {
+ if(!pCir->DGAactive) { /* save the old parameters */
+ OldDisplayWidth[index] = pScrn->displayWidth;
+
+ pCir->DGAactive = TRUE;
+ }
+ pScrn->displayWidth = pMode->bytesPerScanline /
+ (pMode->bitsPerPixel >> 3);
+
+ ret = pCir->DGAModeInit(xf86Screens[index], pMode->mode);
+ }
+ return ret;
+}
+
+static void
+Cir_SetViewport(
+ ScrnInfoPtr pScrn,
+ int x, int y,
+ int flags
+){
+ CirPtr pCir = CIRPTR(pScrn);
+ vgaHWPtr hwp = VGAHWPTR(pScrn);
+
+ pScrn->AdjustFrame(pScrn->pScreen->myNum, x, y, flags);
+
+ while((hwp->readST01(hwp) & 0x08));
+ while(!(hwp->readST01(hwp) & 0x08));
+
+ pCir->DGAViewportStatus = 0; /* AdjustFrame loops until finished */
+}
+
+static int
+Cir_GetViewport(
+ ScrnInfoPtr pScrn
+){
+ CirPtr pCir = CIRPTR(pScrn);
+
+ return pCir->DGAViewportStatus;
+}
+
+
+
+static void
+Cir_Sync(
+ ScrnInfoPtr pScrn
+){
+ CirPtr pCir = CIRPTR(pScrn);
+
+ if(pCir->AccelInfoRec) {
+ (*pCir->AccelInfoRec->Sync)(pScrn);
+ }
+}
+
+static void
+Cir_FillRect (
+ ScrnInfoPtr pScrn,
+ int x, int y, int w, int h,
+ unsigned long color
+){
+ CirPtr pCir = CIRPTR(pScrn);
+
+ if(pCir->AccelInfoRec) {
+ (*pCir->AccelInfoRec->SetupForSolidFill)(pScrn, color, GXcopy, ~0);
+ (*pCir->AccelInfoRec->SubsequentSolidFillRect)(pScrn, x, y, w, h);
+ SET_SYNC_FLAG(pCir->AccelInfoRec);
+ }
+}
+
+static void
+Cir_BlitRect(
+ ScrnInfoPtr pScrn,
+ int srcx, int srcy,
+ int w, int h,
+ int dstx, int dsty
+){
+ CirPtr pCir = CIRPTR(pScrn);
+
+ if(pCir->AccelInfoRec) {
+ int xdir = ((srcx < dstx) && (srcy == dsty)) ? -1 : 1;
+ int ydir = (srcy < dsty) ? -1 : 1;
+
+ (*pCir->AccelInfoRec->SetupForScreenToScreenCopy)(
+ pScrn, xdir, ydir, GXcopy, ~0, -1);
+ (*pCir->AccelInfoRec->SubsequentScreenToScreenCopy)(
+ pScrn, srcx, srcy, dstx, dsty, w, h);
+ SET_SYNC_FLAG(pCir->AccelInfoRec);
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-25 05:06:03 +0000