1 files changed, 291 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/mga/mgabuffers.c b/src/mesa/drivers/dri/mga/mgabuffers.c
new file mode 100644
index 0000000000..19833566a0
--- /dev/null
+++ b/src/mesa/drivers/dri/mga/mgabuffers.c
@@ -0,0 +1,291 @@
+/*
+ * Copyright 2000-2001 VA Linux Systems, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
+ * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Keith Whitwell <keith@tungstengraphics.com>
+ */
+/* $XFree86: xc/lib/GL/mesa/src/drv/mga/mgabuffers.c,v 1.13 2002/11/05 17:46:08 tsi Exp $ */
+
+#include <stdio.h>
+#include "mgacontext.h"
+#include "mgabuffers.h"
+#include "mgastate.h"
+#include "mgaioctl.h"
+#include "mgatris.h"
+
+static void mgaXMesaSetFrontClipRects( mgaContextPtr mmesa )
+{
+   __DRIdrawablePrivate *driDrawable = mmesa->driDrawable;
+
+/*   fprintf( stderr, "%s\n", __FUNCTION__ );*/
+
+   if (driDrawable->numClipRects == 0) {
+       static XF86DRIClipRectRec zeroareacliprect = {0,0,0,0};
+       mmesa->numClipRects = 1;
+       mmesa->pClipRects = &zeroareacliprect;
+   } else {
+       mmesa->numClipRects = driDrawable->numClipRects;
+       mmesa->pClipRects = driDrawable->pClipRects;
+   }
+   mmesa->drawX = driDrawable->x;
+   mmesa->drawY = driDrawable->y;
+
+   mmesa->setup.dstorg = mmesa->drawOffset;
+   mmesa->dirty |= MGA_UPLOAD_CONTEXT | MGA_UPLOAD_CLIPRECTS;
+}
+
+
+static void mgaXMesaSetBackClipRects( mgaContextPtr mmesa )
+{
+   __DRIdrawablePrivate *driDrawable = mmesa->driDrawable;
+
+/*   fprintf( stderr, "%s\n", __FUNCTION__ );*/
+
+   if (driDrawable->numBackClipRects == 0)
+   {
+      if (driDrawable->numClipRects == 0) {
+	  static XF86DRIClipRectRec zeroareacliprect = {0,0,0,0};
+	  mmesa->numClipRects = 1;
+	  mmesa->pClipRects = &zeroareacliprect;
+      } else {
+	  mmesa->numClipRects = driDrawable->numClipRects;
+	  mmesa->pClipRects = driDrawable->pClipRects;
+      }
+      mmesa->drawX = driDrawable->x;
+      mmesa->drawY = driDrawable->y;
+   } else {
+      mmesa->numClipRects = driDrawable->numBackClipRects;
+      mmesa->pClipRects = driDrawable->pBackClipRects;
+      mmesa->drawX = driDrawable->backX;
+      mmesa->drawY = driDrawable->backY;
+   }
+
+   mmesa->setup.dstorg = mmesa->drawOffset;
+   mmesa->dirty |= MGA_UPLOAD_CONTEXT | MGA_UPLOAD_CLIPRECTS;
+}
+
+
+
+#if 0
+static void mgaUpdateRectsFromSarea( mgaContextPtr mmesa )
+{
+   __DRIdrawablePrivate *driDrawable = mmesa->driDrawable;
+   __DRIscreenPrivate *driScreen = mmesa->driScreen;
+   MGASAREAPrivPtr sarea = mmesa->sarea;
+   int i = 0, top = 0;
+
+
+   if (sarea->exported_buffers & MGA_BACK) {
+
+      driDrawable->numBackClipRects = sarea->exported_nback;
+      driDrawable->pBackClipRects = mmesa->tmp_boxes[0];
+
+      top = sarea->exported_nback;
+      for (i = 0 ; i < top ; i++)
+	 driDrawable->pBackClipRects[i] =
+	    *(XF86DRIClipRectPtr)&(sarea->exported_boxes[i]);
+   }
+
+
+   if (sarea->exported_buffers & MGA_FRONT)
+   {
+      int start = top;
+
+      driDrawable->numClipRects = sarea->exported_nfront;
+      driDrawable->pClipRects = mmesa->tmp_boxes[1];
+
+      top += sarea->exported_nfront;
+      for ( ; i < top ; i++)
+	 driDrawable->pClipRects[i-start] =
+	    *(XF86DRIClipRectPtr)&(sarea->exported_boxes[i]);
+
+   }
+
+
+
+   driDrawable->index = sarea->exported_index;
+   driDrawable->lastStamp = sarea->exported_stamp;
+   driDrawable->x = sarea->exported_front_x;
+   driDrawable->y = sarea->exported_front_y;
+   driDrawable->backX = sarea->exported_back_x;
+   driDrawable->backY = sarea->exported_back_y;
+   driDrawable->w = sarea->exported_w;
+   driDrawable->h = sarea->exported_h;
+   driDrawable->pStamp =
+      &(driScreen->pSAREA->drawableTable[driDrawable->index].stamp);
+
+   mmesa->dirty_cliprects = (MGA_FRONT|MGA_BACK) & ~(sarea->exported_buffers);
+}
+#endif
+
+#if 0
+static void printSareaRects( mgaContextPtr mmesa )
+{
+   __DRIscreenPrivate *driScreen = mmesa->driScreen;
+   MGASAREAPrivPtr sarea = mmesa->sarea;
+   int i;
+
+   fprintf(stderr, "sarea->exported: %d\n", sarea->exported_drawable);
+   fprintf(stderr, "sarea->exported_index: %d\n", sarea->exported_index);
+   fprintf(stderr, "sarea->exported_stamp: %d\n", sarea->exported_stamp);
+   fprintf(stderr, "sarea->exported_front_x: %d\n", sarea->exported_front_x);
+   fprintf(stderr, "sarea->exported_front_y: %d\n", sarea->exported_front_y);
+   fprintf(stderr, "sarea->exported_back_x: %d\n", sarea->exported_back_x);
+   fprintf(stderr, "sarea->exported_back_y: %d\n", sarea->exported_back_y);
+   fprintf(stderr, "sarea->exported_w: %d\n", sarea->exported_w);
+   fprintf(stderr, "sarea->exported_h: %d\n", sarea->exported_h);
+   fprintf(stderr, "sarea->exported_buffers: %d\n", sarea->exported_buffers);
+   fprintf(stderr, "sarea->exported_nfront: %d\n", sarea->exported_nfront);
+   fprintf(stderr, "sarea->exported_nback: %d\n", sarea->exported_nback);
+
+   i = 0;
+   if (sarea->exported_buffers & MGA_BACK)
+      for ( ; i < sarea->exported_nback ; i++)
+	 fprintf(stderr, "back %d: %d,%d-%d,%d\n", i,
+		 sarea->exported_boxes[i].x1, sarea->exported_boxes[i].y1,
+		 sarea->exported_boxes[i].x2, sarea->exported_boxes[i].y2);
+
+   if (sarea->exported_buffers & MGA_FRONT) {
+      int start = i;
+      int top = i + sarea->exported_nfront;
+      for ( ; i < top ; i++)
+	 fprintf(stderr, "front %d: %d,%d-%d,%d\n",
+		 i - start,
+		 sarea->exported_boxes[i].x1, sarea->exported_boxes[i].y1,
+		 sarea->exported_boxes[i].x2, sarea->exported_boxes[i].y2);
+   }
+
+   fprintf(stderr, "drawableTable[%d].stamp: %d\n",
+	   sarea->exported_index,
+	   driScreen->pSAREA->drawableTable[sarea->exported_index].stamp);
+}
+
+static void printMmesaRects( mgaContextPtr mmesa )
+{
+   __DRIscreenPrivate *driScreen = mmesa->driScreen;
+   __DRIdrawablePrivate *driDrawable = mmesa->driDrawable;
+   int nr = mmesa->numClipRects;
+   int i;
+
+   fprintf(stderr, "driDrawable->draw: %ld\n", driDrawable->draw);
+   fprintf(stderr, "driDrawable->index: %d\n", driDrawable->index);
+   fprintf(stderr, "driDrawable->lastStamp: %d\n", driDrawable->lastStamp);
+   fprintf(stderr, "mmesa->drawX: %d\n", mmesa->drawX);
+   fprintf(stderr, "mmesa->drawY: %d\n", mmesa->drawY);
+   fprintf(stderr, "driDrawable->w: %d\n", driDrawable->w);
+   fprintf(stderr, "driDrawable->h: %d\n", driDrawable->h);
+
+   for (i = 0 ; i < nr ; i++)
+      fprintf(stderr, "box %d: %d,%d-%d,%d\n", i,
+	      mmesa->pClipRects[i].x1, mmesa->pClipRects[i].y1,
+	      mmesa->pClipRects[i].x2, mmesa->pClipRects[i].y2);
+
+   fprintf(stderr, "mmesa->draw_buffer: %d\n", mmesa->draw_buffer);
+   fprintf(stderr, "drawableTable[%d].stamp: %d\n",
+	   driDrawable->index,
+	   driScreen->pSAREA->drawableTable[driDrawable->index].stamp);
+}
+#endif
+
+
+
+void mgaUpdateRects( mgaContextPtr mmesa, GLuint buffers )
+{
+   __DRIdrawablePrivate *driDrawable = mmesa->driDrawable;
+   MGASAREAPrivPtr sarea = mmesa->sarea;
+
+/*   fprintf(stderr, "%s\n", __FUNCTION__);*/
+
+   DRI_VALIDATE_DRAWABLE_INFO(driScreen, driDrawable); 
+   mmesa->dirty_cliprects = 0;	
+
+   if (mmesa->draw_buffer == MGA_FRONT)
+      mgaXMesaSetFrontClipRects( mmesa );
+   else
+      mgaXMesaSetBackClipRects( mmesa );
+
+#if 0
+   printMmesaRects(mmesa); 
+#endif
+
+   sarea->req_draw_buffer = mmesa->draw_buffer;
+
+   mgaUpdateClipping( mmesa->glCtx );
+   mgaCalcViewport( mmesa->glCtx );
+
+   mmesa->dirty |= MGA_UPLOAD_CLIPRECTS;
+}
+
+
+void mgaDDSetReadBuffer(GLcontext *ctx, GLenum mode )
+{
+   mgaContextPtr mmesa = MGA_CONTEXT(ctx);
+
+   if (mode == GL_FRONT_LEFT) 
+   {
+      mmesa->readOffset = mmesa->mgaScreen->frontOffset;
+      mmesa->read_buffer = MGA_FRONT;
+   } 
+   else 
+   {
+      mmesa->readOffset = mmesa->mgaScreen->backOffset;
+      mmesa->read_buffer = MGA_BACK;
+   }
+}
+
+void mgaDDSetDrawBuffer(GLcontext *ctx, GLenum mode )
+{
+   mgaContextPtr mmesa = MGA_CONTEXT(ctx);
+
+   FLUSH_BATCH( MGA_CONTEXT(ctx) );
+
+/*   fprintf( stderr, "%s %d\n", __FUNCTION__, mode);*/
+
+   /*
+    * _DrawDestMask is easier to cope with than <mode>.
+    */
+   switch ( ctx->Color._DrawDestMask ) {
+     case FRONT_LEFT_BIT:
+       mmesa->drawOffset = mmesa->mgaScreen->frontOffset;
+       mmesa->readOffset = mmesa->mgaScreen->frontOffset;
+       mmesa->setup.dstorg = mmesa->mgaScreen->frontOffset;
+       mmesa->dirty |= MGA_UPLOAD_CONTEXT;
+       mmesa->draw_buffer = MGA_FRONT;
+       mgaXMesaSetFrontClipRects( mmesa );
+       FALLBACK( ctx, MGA_FALLBACK_DRAW_BUFFER, GL_FALSE );
+       break;
+     case BACK_LEFT_BIT:
+       mmesa->drawOffset = mmesa->mgaScreen->backOffset;
+       mmesa->readOffset = mmesa->mgaScreen->backOffset;
+       mmesa->setup.dstorg = mmesa->mgaScreen->backOffset;
+       mmesa->draw_buffer = MGA_BACK;
+       mmesa->dirty |= MGA_UPLOAD_CONTEXT;
+       mgaXMesaSetBackClipRects( mmesa );
+       FALLBACK( ctx, MGA_FALLBACK_DRAW_BUFFER, GL_FALSE );
+       break;
+     default:
+       FALLBACK( ctx, MGA_FALLBACK_DRAW_BUFFER, GL_TRUE );
+       break;
+   }
+}
+