diff options
Diffstat (limited to 'mesalib/src/mesa/state_tracker/st_cb_bufferobjects.c')
| -rw-r--r-- | mesalib/src/mesa/state_tracker/st_cb_bufferobjects.c | 447 |
1 files changed, 447 insertions, 0 deletions
diff --git a/mesalib/src/mesa/state_tracker/st_cb_bufferobjects.c b/mesalib/src/mesa/state_tracker/st_cb_bufferobjects.c new file mode 100644 index 000000000..ba8a8cf89 --- /dev/null +++ b/mesalib/src/mesa/state_tracker/st_cb_bufferobjects.c @@ -0,0 +1,447 @@ +/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+
+/**
+ * Functions for pixel buffer objects and vertex/element buffer objects.
+ */
+
+
+#include "main/imports.h"
+#include "main/mtypes.h"
+#include "main/arrayobj.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 "util/u_inlines.h"
+
+
+/**
+ * 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(struct gl_context *ctx, GLuint name, GLenum target)
+{
+ struct st_buffer_object *st_obj = ST_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(struct gl_context *ctx, struct gl_buffer_object *obj)
+{
+ struct st_buffer_object *st_obj = st_buffer_object(obj);
+
+ assert(obj->RefCount == 0);
+ assert(st_obj->transfer == NULL);
+
+ if (st_obj->buffer)
+ pipe_resource_reference(&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(struct gl_context *ctx,
+ GLenum target,
+ GLintptrARB offset,
+ GLsizeiptrARB size,
+ const GLvoid * data, struct gl_buffer_object *obj)
+{
+ struct st_buffer_object *st_obj = st_buffer_object(obj);
+
+ /* we may be called from VBO code, so double-check params here */
+ ASSERT(offset >= 0);
+ ASSERT(size >= 0);
+ ASSERT(offset + size <= obj->Size);
+
+ if (!size)
+ return;
+
+ /*
+ * According to ARB_vertex_buffer_object specification, if data is null,
+ * then the contents of the buffer object's data store is undefined. We just
+ * ignore, and leave it unchanged.
+ */
+ if (!data)
+ return;
+
+ /* Now that transfers are per-context, we don't have to figure out
+ * flushing here. Usually drivers won't need to flush in this case
+ * even if the buffer is currently referenced by hardware - they
+ * just queue the upload as dma rather than mapping the underlying
+ * buffer directly.
+ */
+ pipe_buffer_write(st_context(ctx)->pipe,
+ st_obj->buffer,
+ offset, size, data);
+}
+
+
+/**
+ * Called via glGetBufferSubDataARB().
+ */
+static void
+st_bufferobj_get_subdata(struct gl_context *ctx,
+ GLenum target,
+ GLintptrARB offset,
+ GLsizeiptrARB size,
+ GLvoid * data, struct gl_buffer_object *obj)
+{
+ struct st_buffer_object *st_obj = st_buffer_object(obj);
+
+ /* we may be called from VBO code, so double-check params here */
+ ASSERT(offset >= 0);
+ ASSERT(size >= 0);
+ ASSERT(offset + size <= obj->Size);
+
+ if (!size)
+ return;
+
+ pipe_buffer_read(st_context(ctx)->pipe, st_obj->buffer,
+ offset, size, data);
+}
+
+
+/**
+ * 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 ctx->Driver.BufferData().
+ * \return GL_TRUE for success, GL_FALSE if out of memory
+ */
+static GLboolean
+st_bufferobj_data(struct gl_context *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_BIND_RENDER_TARGET;
+ break;
+ case GL_ARRAY_BUFFER_ARB:
+ buffer_usage = PIPE_BIND_VERTEX_BUFFER;
+ break;
+ case GL_ELEMENT_ARRAY_BUFFER_ARB:
+ buffer_usage = PIPE_BIND_INDEX_BUFFER;
+ break;
+ default:
+ buffer_usage = 0;
+ }
+
+ pipe_resource_reference( &st_obj->buffer, NULL );
+
+ if (size != 0) {
+ st_obj->buffer = pipe_buffer_create(pipe->screen, buffer_usage, size);
+
+ if (!st_obj->buffer) {
+ return GL_FALSE;
+ }
+
+ if (data)
+ pipe_buffer_write(st_context(ctx)->pipe, st_obj->buffer, 0,
+ size, data);
+ return GL_TRUE;
+ }
+
+ return GL_TRUE;
+}
+
+
+/**
+ * Dummy data whose's pointer is used for zero size buffers or ranges.
+ */
+static long st_bufferobj_zero_length = 0;
+
+
+
+/**
+ * Called via glMapBufferARB().
+ */
+static void *
+st_bufferobj_map(struct gl_context *ctx, GLenum target, GLenum access,
+ struct gl_buffer_object *obj)
+{
+ struct st_buffer_object *st_obj = st_buffer_object(obj);
+ uint flags;
+
+ switch (access) {
+ case GL_WRITE_ONLY:
+ flags = PIPE_TRANSFER_WRITE;
+ break;
+ case GL_READ_ONLY:
+ flags = PIPE_TRANSFER_READ;
+ break;
+ case GL_READ_WRITE:
+ default:
+ flags = PIPE_TRANSFER_READ_WRITE;
+ break;
+ }
+
+ /* Handle zero-size buffers here rather than in drivers */
+ if (obj->Size == 0) {
+ obj->Pointer = &st_bufferobj_zero_length;
+ }
+ else {
+ obj->Pointer = pipe_buffer_map(st_context(ctx)->pipe,
+ st_obj->buffer,
+ flags,
+ &st_obj->transfer);
+ }
+
+ if (obj->Pointer) {
+ obj->Offset = 0;
+ obj->Length = obj->Size;
+ }
+ return obj->Pointer;
+}
+
+
+/**
+ * Called via glMapBufferRange().
+ */
+static void *
+st_bufferobj_map_range(struct gl_context *ctx, GLenum target,
+ GLintptr offset, GLsizeiptr length, GLbitfield access,
+ struct gl_buffer_object *obj)
+{
+ struct pipe_context *pipe = st_context(ctx)->pipe;
+ struct st_buffer_object *st_obj = st_buffer_object(obj);
+ enum pipe_transfer_usage flags = 0x0;
+
+ if (access & GL_MAP_WRITE_BIT)
+ flags |= PIPE_TRANSFER_WRITE;
+
+ if (access & GL_MAP_READ_BIT)
+ flags |= PIPE_TRANSFER_READ;
+
+ if (access & GL_MAP_FLUSH_EXPLICIT_BIT)
+ flags |= PIPE_TRANSFER_FLUSH_EXPLICIT;
+
+ if (access & GL_MAP_INVALIDATE_RANGE_BIT)
+ flags |= PIPE_TRANSFER_DISCARD;
+
+ if (access & GL_MAP_INVALIDATE_BUFFER_BIT)
+ flags |= PIPE_TRANSFER_DISCARD;
+
+ if (access & GL_MAP_UNSYNCHRONIZED_BIT)
+ flags |= PIPE_TRANSFER_UNSYNCHRONIZED;
+
+ /* ... other flags ...
+ */
+
+ if (access & MESA_MAP_NOWAIT_BIT)
+ flags |= PIPE_TRANSFER_DONTBLOCK;
+
+ assert(offset >= 0);
+ assert(length >= 0);
+ assert(offset < obj->Size);
+ assert(offset + length <= obj->Size);
+
+ /*
+ * We go out of way here to hide the degenerate yet valid case of zero
+ * length range from the pipe driver.
+ */
+ if (!length) {
+ obj->Pointer = &st_bufferobj_zero_length;
+ }
+ else {
+ obj->Pointer = pipe_buffer_map_range(pipe,
+ st_obj->buffer,
+ offset, length,
+ flags,
+ &st_obj->transfer);
+ if (obj->Pointer) {
+ obj->Pointer = (ubyte *) obj->Pointer + offset;
+ }
+ }
+
+ if (obj->Pointer) {
+ obj->Offset = offset;
+ obj->Length = length;
+ obj->AccessFlags = access;
+ }
+
+ return obj->Pointer;
+}
+
+
+static void
+st_bufferobj_flush_mapped_range(struct gl_context *ctx, GLenum target,
+ GLintptr offset, GLsizeiptr length,
+ struct gl_buffer_object *obj)
+{
+ struct pipe_context *pipe = st_context(ctx)->pipe;
+ struct st_buffer_object *st_obj = st_buffer_object(obj);
+
+ /* Subrange is relative to mapped range */
+ assert(offset >= 0);
+ assert(length >= 0);
+ assert(offset + length <= obj->Length);
+ assert(obj->Pointer);
+
+ if (!length)
+ return;
+
+ pipe_buffer_flush_mapped_range(pipe, st_obj->transfer,
+ obj->Offset + offset, length);
+}
+
+
+/**
+ * Called via glUnmapBufferARB().
+ */
+static GLboolean
+st_bufferobj_unmap(struct gl_context *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);
+
+ if (obj->Length)
+ pipe_buffer_unmap(pipe, st_obj->transfer);
+
+ st_obj->transfer = NULL;
+ obj->Pointer = NULL;
+ obj->Offset = 0;
+ obj->Length = 0;
+ return GL_TRUE;
+}
+
+
+/**
+ * Called via glCopyBufferSubData().
+ */
+static void
+st_copy_buffer_subdata(struct gl_context *ctx,
+ struct gl_buffer_object *src,
+ struct gl_buffer_object *dst,
+ GLintptr readOffset, GLintptr writeOffset,
+ GLsizeiptr size)
+{
+ struct pipe_context *pipe = st_context(ctx)->pipe;
+ struct st_buffer_object *srcObj = st_buffer_object(src);
+ struct st_buffer_object *dstObj = st_buffer_object(dst);
+ struct pipe_transfer *src_transfer;
+ struct pipe_transfer *dst_transfer;
+ ubyte *srcPtr, *dstPtr;
+
+ if(!size)
+ return;
+
+ /* buffer should not already be mapped */
+ assert(!src->Pointer);
+ assert(!dst->Pointer);
+
+ srcPtr = (ubyte *) pipe_buffer_map_range(pipe,
+ srcObj->buffer,
+ readOffset, size,
+ PIPE_TRANSFER_READ,
+ &src_transfer);
+
+ dstPtr = (ubyte *) pipe_buffer_map_range(pipe,
+ dstObj->buffer,
+ writeOffset, size,
+ PIPE_TRANSFER_WRITE,
+ &dst_transfer);
+
+ if (srcPtr && dstPtr)
+ memcpy(dstPtr + writeOffset, srcPtr + readOffset, size);
+
+ pipe_buffer_unmap(pipe, src_transfer);
+ pipe_buffer_unmap(pipe, dst_transfer);
+}
+
+
+/* TODO: if buffer wasn't created with appropriate usage flags, need
+ * to recreate it now and copy contents -- or possibly create a
+ * gallium entrypoint to extend the usage flags and let the driver
+ * decide if a copy is necessary.
+ */
+void
+st_bufferobj_validate_usage(struct st_context *st,
+ struct st_buffer_object *obj,
+ unsigned usage)
+{
+}
+
+
+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->MapBufferRange = st_bufferobj_map_range;
+ functions->FlushMappedBufferRange = st_bufferobj_flush_mapped_range;
+ functions->UnmapBuffer = st_bufferobj_unmap;
+ functions->CopyBufferSubData = st_copy_buffer_subdata;
+
+ /* For GL_APPLE_vertex_array_object */
+ functions->NewArrayObject = _mesa_new_array_object;
+ functions->DeleteArrayObject = _mesa_delete_array_object;
+}
|