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Diffstat (limited to 'src/mesa/state_tracker/st_cb_bufferobjects.c')
-rw-r--r--src/mesa/state_tracker/st_cb_bufferobjects.c240
1 files changed, 240 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_cb_bufferobjects.c b/src/mesa/state_tracker/st_cb_bufferobjects.c
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+/**************************************************************************
+ *
+ * Copyright 2007 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 "main/imports.h"
+#include "main/mtypes.h"
+#include "main/bufferobj.h"
+
+#include "st_context.h"
+#include "st_cb_bufferobjects.h"
+
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_inlines.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_buffer_object *st_obj = CALLOC_STRUCT(st_buffer_object);
+
+ if (!st_obj)
+ return NULL;
+
+ _mesa_initialize_buffer_object(&st_obj->Base, name, target);
+
+ 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_reference_buffer(pipe, &st_obj->buffer, NULL);
+
+ free(st_obj);
+}
+
+
+
+/**
+ * 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);
+ char *map;
+
+ if (offset >= st_obj->size || size > (st_obj->size - offset))
+ return;
+
+ map = pipe_buffer_map(pipe, st_obj->buffer, PIPE_BUFFER_USAGE_CPU_WRITE);
+ memcpy(map + offset, data, size);
+ pipe_buffer_unmap(pipe, st_obj->buffer);
+}
+
+
+/**
+ * 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);
+ char *map;
+
+ if (offset >= st_obj->size || size > (st_obj->size - offset))
+ return;
+
+ map = pipe_buffer_map(pipe, st_obj->buffer, PIPE_BUFFER_USAGE_CPU_READ);
+ memcpy(data, map + offset, size);
+ pipe_buffer_unmap(pipe, st_obj->buffer);
+}
+
+
+/**
+ * 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 st_context *st = st_context(ctx);
+ struct pipe_context *pipe = st->pipe;
+ struct st_buffer_object *st_obj = st_buffer_object(obj);
+ unsigned buffer_usage;
+
+ st_obj->Base.Size = size;
+ st_obj->Base.Usage = usage;
+
+ switch(target) {
+ case GL_PIXEL_PACK_BUFFER_ARB:
+ case GL_PIXEL_UNPACK_BUFFER_ARB:
+ buffer_usage = PIPE_BUFFER_USAGE_PIXEL;
+ break;
+ case GL_ARRAY_BUFFER_ARB:
+ buffer_usage = PIPE_BUFFER_USAGE_VERTEX;
+ break;
+ case GL_ELEMENT_ARRAY_BUFFER_ARB:
+ buffer_usage = PIPE_BUFFER_USAGE_INDEX;
+ break;
+ default:
+ buffer_usage = 0;
+ }
+
+ pipe_reference_buffer( pipe, &st_obj->buffer, NULL );
+
+ st_obj->buffer = pipe_buffer_create( pipe, 32, buffer_usage, size );
+
+ st_obj->size = size;
+
+ if (data)
+ st_bufferobj_subdata(ctx, target, 0, size, data, obj);
+}
+
+
+/**
+ * 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_USAGE_CPU_WRITE;
+ break;
+ case GL_READ_ONLY:
+ flags = PIPE_BUFFER_USAGE_CPU_READ;
+ break;
+ case GL_READ_WRITE:
+ /* fall-through */
+ default:
+ flags = PIPE_BUFFER_USAGE_CPU_READ | PIPE_BUFFER_USAGE_CPU_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_bufferobject_functions(struct dd_function_table *functions)
+{
+ functions->NewBufferObject = st_bufferobj_alloc;
+ functions->DeleteBuffer = st_bufferobj_free;
+ functions->BufferData = st_bufferobj_data;
+ functions->BufferSubData = st_bufferobj_subdata;
+ functions->GetBufferSubData = st_bufferobj_get_subdata;
+ functions->MapBuffer = st_bufferobj_map;
+ functions->UnmapBuffer = st_bufferobj_unmap;
+}
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