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-rw-r--r--src/mga_shadow.c254
1 files changed, 254 insertions, 0 deletions
diff --git a/src/mga_shadow.c b/src/mga_shadow.c
new file mode 100644
index 0000000..b1c228b
--- /dev/null
+++ b/src/mga_shadow.c
@@ -0,0 +1,254 @@
+/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/mga/mga_shadow.c,v 1.3 2000/02/08 13:13:18 eich Exp $ */
+
+/*
+ Copyright (c) 1999, The XFree86 Project Inc.
+ Written by Mark Vojkovich <markv@valinux.com>
+*/
+
+#include "xf86.h"
+#include "xf86_OSproc.h"
+#include "xf86Resources.h"
+#include "xf86_ansic.h"
+#include "xf86PciInfo.h"
+#include "xf86Pci.h"
+#include "mga_bios.h"
+#include "mga_reg.h"
+#include "mga.h"
+#include "shadowfb.h"
+#include "servermd.h"
+
+
+
+void
+MGARefreshArea(ScrnInfoPtr pScrn, int num, BoxPtr pbox)
+{
+ MGAPtr pMga = MGAPTR(pScrn);
+ int width, height, Bpp, FBPitch;
+ unsigned char *src, *dst;
+
+ Bpp = pScrn->bitsPerPixel >> 3;
+ FBPitch = BitmapBytePad(pScrn->displayWidth * pScrn->bitsPerPixel);
+
+ while(num--) {
+ width = (pbox->x2 - pbox->x1) * Bpp;
+ height = pbox->y2 - pbox->y1;
+ src = pMga->ShadowPtr + (pbox->y1 * pMga->ShadowPitch) +
+ (pbox->x1 * Bpp);
+ dst = pMga->FbStart + (pbox->y1 * FBPitch) + (pbox->x1 * Bpp);
+
+ while(height--) {
+ memcpy(dst, src, width);
+ dst += FBPitch;
+ src += pMga->ShadowPitch;
+ }
+
+ pbox++;
+ }
+}
+
+void
+MGAPointerMoved(int index, int x, int y)
+{
+ ScrnInfoPtr pScrn = xf86Screens[index];
+ MGAPtr pMga = MGAPTR(pScrn);
+ int newX, newY;
+
+ if(pMga->Rotate == 1) {
+ newX = pScrn->pScreen->height - y - 1;
+ newY = x;
+ } else {
+ newX = y;
+ newY = pScrn->pScreen->width - x - 1;
+ }
+
+ (*pMga->PointerMoved)(index, newX, newY);
+}
+
+void
+MGARefreshArea8(ScrnInfoPtr pScrn, int num, BoxPtr pbox)
+{
+ MGAPtr pMga = MGAPTR(pScrn);
+ int count, width, height, y1, y2, dstPitch, srcPitch;
+ CARD8 *dstPtr, *srcPtr, *src;
+ CARD32 *dst;
+
+ dstPitch = pScrn->displayWidth;
+ srcPitch = -pMga->Rotate * pMga->ShadowPitch;
+
+ while(num--) {
+ width = pbox->x2 - pbox->x1;
+ y1 = pbox->y1 & ~3;
+ y2 = (pbox->y2 + 3) & ~3;
+ height = (y2 - y1) >> 2; /* in dwords */
+
+ if(pMga->Rotate == 1) {
+ dstPtr = pMga->FbStart +
+ (pbox->x1 * dstPitch) + pScrn->virtualX - y2;
+ srcPtr = pMga->ShadowPtr + ((1 - y2) * srcPitch) + pbox->x1;
+ } else {
+ dstPtr = pMga->FbStart +
+ ((pScrn->virtualY - pbox->x2) * dstPitch) + y1;
+ srcPtr = pMga->ShadowPtr + (y1 * srcPitch) + pbox->x2 - 1;
+ }
+
+ while(width--) {
+ src = srcPtr;
+ dst = (CARD32*)dstPtr;
+ count = height;
+ while(count--) {
+ *(dst++) = src[0] | (src[srcPitch] << 8) |
+ (src[srcPitch * 2] << 16) |
+ (src[srcPitch * 3] << 24);
+ src += srcPitch * 4;
+ }
+ srcPtr += pMga->Rotate;
+ dstPtr += dstPitch;
+ }
+
+ pbox++;
+ }
+}
+
+
+void
+MGARefreshArea16(ScrnInfoPtr pScrn, int num, BoxPtr pbox)
+{
+ MGAPtr pMga = MGAPTR(pScrn);
+ int count, width, height, y1, y2, dstPitch, srcPitch;
+ CARD16 *dstPtr, *srcPtr, *src;
+ CARD32 *dst;
+
+ dstPitch = pScrn->displayWidth;
+ srcPitch = -pMga->Rotate * pMga->ShadowPitch >> 1;
+
+ while(num--) {
+ width = pbox->x2 - pbox->x1;
+ y1 = pbox->y1 & ~1;
+ y2 = (pbox->y2 + 1) & ~1;
+ height = (y2 - y1) >> 1; /* in dwords */
+
+ if(pMga->Rotate == 1) {
+ dstPtr = (CARD16*)pMga->FbStart +
+ (pbox->x1 * dstPitch) + pScrn->virtualX - y2;
+ srcPtr = (CARD16*)pMga->ShadowPtr +
+ ((1 - y2) * srcPitch) + pbox->x1;
+ } else {
+ dstPtr = (CARD16*)pMga->FbStart +
+ ((pScrn->virtualY - pbox->x2) * dstPitch) + y1;
+ srcPtr = (CARD16*)pMga->ShadowPtr +
+ (y1 * srcPitch) + pbox->x2 - 1;
+ }
+
+ while(width--) {
+ src = srcPtr;
+ dst = (CARD32*)dstPtr;
+ count = height;
+ while(count--) {
+ *(dst++) = src[0] | (src[srcPitch] << 16);
+ src += srcPitch * 2;
+ }
+ srcPtr += pMga->Rotate;
+ dstPtr += dstPitch;
+ }
+
+ pbox++;
+ }
+}
+
+
+/* this one could be faster */
+void
+MGARefreshArea24(ScrnInfoPtr pScrn, int num, BoxPtr pbox)
+{
+ MGAPtr pMga = MGAPTR(pScrn);
+ int count, width, height, y1, y2, dstPitch, srcPitch;
+ CARD8 *dstPtr, *srcPtr, *src;
+ CARD32 *dst;
+
+ dstPitch = BitmapBytePad(pScrn->displayWidth * 24);
+ srcPitch = -pMga->Rotate * pMga->ShadowPitch;
+
+ while(num--) {
+ width = pbox->x2 - pbox->x1;
+ y1 = pbox->y1 & ~3;
+ y2 = (pbox->y2 + 3) & ~3;
+ height = (y2 - y1) >> 2; /* blocks of 3 dwords */
+
+ if(pMga->Rotate == 1) {
+ dstPtr = pMga->FbStart +
+ (pbox->x1 * dstPitch) + ((pScrn->virtualX - y2) * 3);
+ srcPtr = pMga->ShadowPtr + ((1 - y2) * srcPitch) + (pbox->x1 * 3);
+ } else {
+ dstPtr = pMga->FbStart +
+ ((pScrn->virtualY - pbox->x2) * dstPitch) + (y1 * 3);
+ srcPtr = pMga->ShadowPtr + (y1 * srcPitch) + (pbox->x2 * 3) - 3;
+ }
+
+ while(width--) {
+ src = srcPtr;
+ dst = (CARD32*)dstPtr;
+ count = height;
+ while(count--) {
+ dst[0] = src[0] | (src[1] << 8) | (src[2] << 16) |
+ (src[srcPitch] << 24);
+ dst[1] = src[srcPitch + 1] | (src[srcPitch + 2] << 8) |
+ (src[srcPitch * 2] << 16) |
+ (src[(srcPitch * 2) + 1] << 24);
+ dst[2] = src[(srcPitch * 2) + 2] | (src[srcPitch * 3] << 8) |
+ (src[(srcPitch * 3) + 1] << 16) |
+ (src[(srcPitch * 3) + 2] << 24);
+ dst += 3;
+ src += srcPitch * 4;
+ }
+ srcPtr += pMga->Rotate * 3;
+ dstPtr += dstPitch;
+ }
+
+ pbox++;
+ }
+}
+
+void
+MGARefreshArea32(ScrnInfoPtr pScrn, int num, BoxPtr pbox)
+{
+ MGAPtr pMga = MGAPTR(pScrn);
+ int count, width, height, dstPitch, srcPitch;
+ CARD32 *dstPtr, *srcPtr, *src, *dst;
+
+ dstPitch = pScrn->displayWidth;
+ srcPitch = -pMga->Rotate * pMga->ShadowPitch >> 2;
+
+ while(num--) {
+ width = pbox->x2 - pbox->x1;
+ height = pbox->y2 - pbox->y1;
+
+ if(pMga->Rotate == 1) {
+ dstPtr = (CARD32*)pMga->FbStart +
+ (pbox->x1 * dstPitch) + pScrn->virtualX - pbox->y2;
+ srcPtr = (CARD32*)pMga->ShadowPtr +
+ ((1 - pbox->y2) * srcPitch) + pbox->x1;
+ } else {
+ dstPtr = (CARD32*)pMga->FbStart +
+ ((pScrn->virtualY - pbox->x2) * dstPitch) + pbox->y1;
+ srcPtr = (CARD32*)pMga->ShadowPtr +
+ (pbox->y1 * srcPitch) + pbox->x2 - 1;
+ }
+
+ while(width--) {
+ src = srcPtr;
+ dst = dstPtr;
+ count = height;
+ while(count--) {
+ *(dst++) = *src;
+ src += srcPitch;
+ }
+ srcPtr += pMga->Rotate;
+ dstPtr += dstPitch;
+ }
+
+ pbox++;
+ }
+}
+
+
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-21 20:38:58 +0000