Add pipe buffer managment functions.

The state_tracker driver needs these to implement, eg. pixel buffer objects,
vertex buffer objects.

2 files changed, 272 insertions, 0 deletions

diff --git a/src/mesa/state_tracker/st_cb_bufferobjects.c b/src/mesa/state_tracker/st_cb_bufferobjects.c
new file mode 100644
index 0000000000..a667b3e775
--- /dev/null
+++ b/src/mesa/state_tracker/st_cb_bufferobjects.c
@@ -0,0 +1,206 @@
+/**************************************************************************
+ * 
+ * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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 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 TUNGSTEN GRAPHICS 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.
+ * 
+ **************************************************************************/
+
+
+#include "imports.h"
+#include "mtypes.h"
+#include "bufferobj.h"
+
+#include "st_context.h"
+#include "st_cb_bufferobjects.h"
+
+#include "pipe/p_context.h"
+
+/* Pixel buffers and Vertex/index buffers are handled through these
+ * mesa callbacks.  Framebuffer/Renderbuffer objects are
+ * created/managed elsewhere.
+ */
+
+
+
+/**
+ * There is some duplication between mesa's bufferobjects and our
+ * bufmgr buffers.  Both have an integer handle and a hashtable to
+ * lookup an opaque structure.  It would be nice if the handles and
+ * internal structure where somehow shared.
+ */
+static struct gl_buffer_object *
+st_bufferobj_alloc(GLcontext *ctx, GLuint name, GLenum target)
+{
+   struct st_context *st = st_context(ctx);
+   struct st_buffer_object *st_obj = CALLOC_STRUCT(st_buffer_object);
+
+   _mesa_initialize_buffer_object(&st_obj->Base, name, target);
+
+   st_obj->buffer = st->pipe->create_buffer( st->pipe, 32, 0 );
+
+   return &st_obj->Base;
+}
+
+
+
+/**
+ * Deallocate/free a vertex/pixel buffer object.
+ * Called via glDeleteBuffersARB().
+ */
+static void
+st_bufferobj_free(GLcontext *ctx, struct gl_buffer_object *obj)
+{
+   struct pipe_context *pipe = st_context(ctx)->pipe;
+   struct st_buffer_object *st_obj = st_buffer_object(obj);
+
+   if (st_obj->buffer) 
+      pipe->buffer_unreference(pipe, &st_obj->buffer);
+
+   FREE(st_obj);
+}
+
+
+
+/**
+ * Allocate space for and store data in a buffer object.  Any data that was
+ * previously stored in the buffer object is lost.  If data is NULL,
+ * memory will be allocated, but no copy will occur.
+ * Called via glBufferDataARB().
+ */
+static void
+st_bufferobj_data(GLcontext *ctx,
+		  GLenum target,
+		  GLsizeiptrARB size,
+		  const GLvoid * data,
+		  GLenum usage, 
+		  struct gl_buffer_object *obj)
+{
+   struct pipe_context *pipe = st_context(ctx)->pipe;
+   struct st_buffer_object *st_obj = st_buffer_object(obj);
+
+   st_obj->Base.Size = size;
+   st_obj->Base.Usage = usage;
+
+   pipe->buffer_data( pipe, st_obj->buffer, size, data );
+}
+
+
+/**
+ * Replace data in a subrange of buffer object.  If the data range
+ * specified by size + offset extends beyond the end of the buffer or
+ * if data is NULL, no copy is performed.
+ * Called via glBufferSubDataARB().
+ */
+static void
+st_bufferobj_subdata(GLcontext *ctx,
+		     GLenum target,
+		     GLintptrARB offset,
+		     GLsizeiptrARB size,
+		     const GLvoid * data, struct gl_buffer_object *obj)
+{
+   struct pipe_context *pipe = st_context(ctx)->pipe;
+   struct st_buffer_object *st_obj = st_buffer_object(obj);
+
+   pipe->buffer_subdata(pipe, st_obj->buffer, offset, size, data);
+}
+
+
+/**
+ * Called via glGetBufferSubDataARB().
+ */
+static void
+st_bufferobj_get_subdata(GLcontext *ctx,
+                            GLenum target,
+                            GLintptrARB offset,
+                            GLsizeiptrARB size,
+                            GLvoid * data, struct gl_buffer_object *obj)
+{
+   struct pipe_context *pipe = st_context(ctx)->pipe;
+   struct st_buffer_object *st_obj = st_buffer_object(obj);
+
+   pipe->buffer_get_subdata(pipe, st_obj->buffer, offset, size, data);
+}
+
+
+
+/**
+ * Called via glMapBufferARB().
+ */
+static void *
+st_bufferobj_map(GLcontext *ctx,
+                    GLenum target,
+                    GLenum access, struct gl_buffer_object *obj)
+{
+   struct pipe_context *pipe = st_context(ctx)->pipe;
+   struct st_buffer_object *st_obj = st_buffer_object(obj);
+   GLuint flags;
+
+   switch (access) {
+   case GL_WRITE_ONLY:
+      flags = PIPE_BUFFER_FLAG_WRITE;
+      break;
+
+
+      flags = PIPE_BUFFER_FLAG_READ;
+      break;
+
+   case GL_READ_WRITE:
+   default:
+      flags = PIPE_BUFFER_FLAG_READ | PIPE_BUFFER_FLAG_WRITE;
+      break;      
+   }
+
+   obj->Pointer = pipe->buffer_map(pipe, st_obj->buffer, flags);
+   return obj->Pointer;
+}
+
+
+/**
+ * Called via glMapBufferARB().
+ */
+static GLboolean
+st_bufferobj_unmap(GLcontext *ctx,
+		   GLenum target, struct gl_buffer_object *obj)
+{
+   struct pipe_context *pipe = st_context(ctx)->pipe;
+   struct st_buffer_object *st_obj = st_buffer_object(obj);
+
+   pipe->buffer_unmap(pipe, st_obj->buffer);
+   obj->Pointer = NULL;
+   return GL_TRUE;
+}
+
+
+void
+st_init_cb_bufferobjects( struct st_context *st )
+{
+   GLcontext *ctx = st->ctx;
+
+   ctx->Driver.NewBufferObject = st_bufferobj_alloc;
+   ctx->Driver.DeleteBuffer = st_bufferobj_free;
+   ctx->Driver.BufferData = st_bufferobj_data;
+   ctx->Driver.BufferSubData = st_bufferobj_subdata;
+   ctx->Driver.GetBufferSubData = st_bufferobj_get_subdata;
+   ctx->Driver.MapBuffer = st_bufferobj_map;
+   ctx->Driver.UnmapBuffer = st_bufferobj_unmap;
+}
diff --git a/src/mesa/state_tracker/st_cb_bufferobjects.h b/src/mesa/state_tracker/st_cb_bufferobjects.h
new file mode 100644
index 0000000000..2787411c5f
--- /dev/null
+++ b/src/mesa/state_tracker/st_cb_bufferobjects.h
@@ -0,0 +1,66 @@
+ /**************************************************************************
+ * 
+ * Copyright 2005 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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 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 TUNGSTEN GRAPHICS 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.
+ * 
+ **************************************************************************/
+
+#ifndef ST_CB_BUFFEROBJECTS_H
+#define ST_CB_BUFFEROBJECTS_H
+
+struct st_context;
+struct gl_buffer_object;
+struct pipe_buffer_handle;
+
+/**
+ * State_tracker vertex/pixel buffer object, derived from Mesa's
+ * gl_buffer_object.
+ */
+struct st_buffer_object
+{
+   struct gl_buffer_object Base;
+   struct pipe_buffer_handle *buffer;  
+};
+
+
+/* Hook the bufferobject implementation into mesa: 
+ */
+void st_init_cb_bufferobjects( struct st_context *st );
+
+
+/* Are the obj->Name tests necessary?  Unfortunately yes, mesa
+ * allocates a couple of gl_buffer_object structs statically, and the
+ * Name == 0 test is the only way to identify them and avoid casting
+ * them erroneously to our structs.
+ */
+static INLINE struct st_buffer_object *
+st_buffer_object(struct gl_buffer_object *obj)
+{
+   if (obj->Name)
+      return (struct st_buffer_object *) obj;
+   else
+      return NULL;
+}
+
+
+#endif