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/**************************************************************************

 *

 * Copyright 2011 Marek Olšák 

 * 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 AUTHORS 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 U_VBUF_H

#define U_VBUF_H

/* This module takes care of user buffer uploads and vertex format fallbacks.

 * It's designed for the drivers which don't want to use the Draw module.

 * There is a more detailed description at the beginning of the .c file.

 */

#include "pipe/p_context.h"

#include "pipe/p_state.h"

#include "pipe/p_format.h"

struct cso_context;

struct u_vbuf;

/* Hardware vertex fetcher limitations can be described by this structure. */

struct u_vbuf_caps {

   enum pipe_format format_translation[PIPE_FORMAT_COUNT];

   /* Whether vertex fetches don't have to be 4-byte-aligned. */

   /* TRUE if hardware supports it. */

   unsigned buffer_offset_unaligned:1;

   unsigned buffer_stride_unaligned:1;

   unsigned velem_src_offset_unaligned:1;

   /* Whether the driver supports user vertex buffers. */

   unsigned user_vertex_buffers:1;

};

boolean u_vbuf_get_caps(struct pipe_screen *screen, struct u_vbuf_caps *caps);

struct u_vbuf *

u_vbuf_create(struct pipe_context *pipe,

              struct u_vbuf_caps *caps, unsigned aux_vertex_buffer_index);

void u_vbuf_destroy(struct u_vbuf *mgr);

/* State and draw functions. */

void u_vbuf_set_vertex_elements(struct u_vbuf *mgr, unsigned count,

                                const struct pipe_vertex_element *states);

void u_vbuf_set_vertex_buffers(struct u_vbuf *mgr,

                               unsigned start_slot, unsigned count,

                               const struct pipe_vertex_buffer *bufs);

void u_vbuf_set_index_buffer(struct u_vbuf *mgr,

                             const struct pipe_index_buffer *ib);

void u_vbuf_draw_vbo(struct u_vbuf *mgr, const struct pipe_draw_info *info);

/* Save/restore functionality. */

void u_vbuf_save_vertex_elements(struct u_vbuf *mgr);

void u_vbuf_restore_vertex_elements(struct u_vbuf *mgr);

void u_vbuf_save_aux_vertex_buffer_slot(struct u_vbuf *mgr);

void u_vbuf_restore_aux_vertex_buffer_slot(struct u_vbuf *mgr);

#endif