1 files changed, 165 insertions, 0 deletions
diff --git a/xc/programs/Xserver/GL/glx/glxfb.c b/xc/programs/Xserver/GL/glx/glxfb.c
new file mode 100644
index 000000000..67ea31434
--- /dev/null
+++ b/xc/programs/Xserver/GL/glx/glxfb.c
@@ -0,0 +1,165 @@
+/* $XFree86: xc/programs/Xserver/GL/glx/glxfb.c,v 1.2 1999/06/14 07:31:27 dawes Exp $ */
+/*
+** The contents of this file are subject to the GLX Public License Version 1.0
+** (the "License"). You may not use this file except in compliance with the
+** License. You may obtain a copy of the License at Silicon Graphics, Inc.,
+** attn: Legal Services, 2011 N. Shoreline Blvd., Mountain View, CA 94043
+** or at http://www.sgi.com/software/opensource/glx/license.html.
+**
+** Software distributed under the License is distributed on an "AS IS"
+** basis. ALL WARRANTIES ARE DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY
+** IMPLIED WARRANTIES OF MERCHANTABILITY, OF FITNESS FOR A PARTICULAR
+** PURPOSE OR OF NON- INFRINGEMENT. See the License for the specific
+** language governing rights and limitations under the License.
+**
+** The Original Software is GLX version 1.2 source code, released February,
+** 1999. The developer of the Original Software is Silicon Graphics, Inc.
+** Those portions of the Subject Software created by Silicon Graphics, Inc.
+** are Copyright (c) 1991-9 Silicon Graphics, Inc. All Rights Reserved.
+**
+** $SGI$
+*/
+
+/*
+** An implementation of a buffer which is part of the front buffer
+*/
+
+#include "glxserver.h"
+#include "glxutil.h"
+#include "glxfb.h"
+
+#include <gcstruct.h>
+
+/* can't include glmath.h */
+extern GLuint __glFloorLog2(GLuint);
+
+typedef struct __GLFBbufferInfoRec {
+    GCPtr	pGC;
+} __GLFBbufferInfo;
+
+extern PixmapPtr __glXPrivPixGetPtr(__GLdrawableBuffer *);
+
+/* ---------------------------------------------------------- */
+
+static GLboolean
+Resize(__GLdrawableBuffer *buf, 
+       GLint x, GLint y, GLuint width, GLuint height,
+       __GLdrawablePrivate *glPriv, GLuint bufferMask)
+{
+    buf->width = width;
+    buf->height = height;
+    buf->byteWidth = width * buf->elementSize;
+    buf->outerWidth = width;
+
+    return GL_TRUE;
+}
+
+static void
+Lock(__GLdrawableBuffer *buf, __GLdrawablePrivate *glPriv)
+{
+}
+
+static void
+Unlock(__GLdrawableBuffer *buf, __GLdrawablePrivate *glPriv)
+{
+}
+
+/*
+** Do a swap buffer with
+** a memory surface as a back buffer
+** a FB surface as a front buffer
+*/
+GLboolean
+__glXFBMemSwapBuffers(__GLXdrawablePrivate *glxPriv)
+{
+    __GLdrawablePrivate *glPriv = &glxPriv->glPriv;
+    __GLdrawableBuffer *front = &glPriv->frontBuffer;
+    __GLdrawableBuffer *back = &glPriv->backBuffer;
+    __GLFBbufferInfo *bufferInfo;
+    GCPtr pGC;
+    GLint width, height, depth, pad;
+    GLubyte *buf;
+
+    bufferInfo = (__GLFBbufferInfo *) front->other;
+    pGC = bufferInfo->pGC;
+
+    width = back->width;
+    height = back->height;
+    depth = back->depth;
+    buf = back->base;
+    pad = back->outerWidth - back->width;	/* back buffer padding */
+    /* adjust buffer padding. X wants left, GL has right */
+    buf -= pad;
+
+    ValidateGC(glxPriv->pDraw, pGC);
+    (*pGC->ops->PutImage)(glxPriv->pDraw, pGC,
+			 depth,
+			 0, 0, width, height,
+			 pad, ZPixmap,
+			 (char *)buf);
+
+    return GL_TRUE;
+}
+
+static void
+Free(__GLdrawableBuffer *buf, __GLdrawablePrivate *glPriv)
+{
+    __GLFBbufferInfo *bufferInfo;
+
+    bufferInfo = (__GLFBbufferInfo *) buf->other;
+
+    if (bufferInfo->pGC) {
+	FreeScratchGC(bufferInfo->pGC);
+    }
+
+    __glXFree(bufferInfo);
+    buf->other = NULL;
+}
+
+/*
+** function to return the X GC of this buffer (to be used by DDX)
+*/
+GCPtr __glXFBGetGC(__GLdrawableBuffer *buf)
+{
+    __GLFBbufferInfo *bufferInfo;
+
+    bufferInfo = (__GLFBbufferInfo *) buf->other;
+
+    if (bufferInfo) {
+	return bufferInfo->pGC;
+    } else {
+	return NULL;
+    }
+}
+
+
+void
+__glXInitFB(__GLdrawableBuffer *buf, __GLdrawablePrivate *glPriv, GLint bits)
+{
+    __GLFBbufferInfo *bufferInfo;
+    __GLXdrawablePrivate *glxPriv = (__GLXdrawablePrivate *) glPriv->other;
+    GCPtr pGC;
+
+    buf->depth = bits;
+    buf->width = buf->height = 0;	/* to be filled during Update */
+    buf->handle = buf->base = NULL;	/* to be filled during Update */
+    buf->size = 0;
+    buf->byteWidth = 0;
+    buf->elementSize = ((bits-1) / 8) + 1;
+    buf->elementSizeLog2 = __glFloorLog2(buf->elementSize);
+
+    buf->resize = Resize;
+    buf->lock = Lock;
+    buf->unlock = Unlock;
+    buf->fill = NULL;
+    buf->free = Free;
+
+    /* allocate local information */
+    bufferInfo = (__GLFBbufferInfo *) __glXMalloc(sizeof(__GLFBbufferInfo));
+    buf->other = (void *) bufferInfo;
+
+    pGC = CreateScratchGC(glxPriv->pDraw->pScreen,
+			  glxPriv->pDraw->depth);
+    bufferInfo->pGC = pGC;
+    (*pGC->funcs->ChangeClip)(pGC, CT_NONE, NULL, 0);
+}