mutter/clutter/cogl/common/cogl-mesh-private.h

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/*
* Clutter COGL
*
* A basic GL/GLES Abstraction/Utility Layer
*
* Authored By Robert Bragg <bob@o-hand.com>
*
* Copyright (C) 2008 Intel
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __COGL_MESH_H
#define __COGL_MESH_H
/* Note we put quite a bit into the flags here to help keep
* the down size of the CoglMeshAttribute struct below. */
typedef enum _CoglMeshAttributeFlags
{
/* Types */
/* NB: update the _TYPE_MASK below if these are changed */
COGL_MESH_ATTRIBUTE_FLAG_COLOR_ARRAY = 1<<0,
COGL_MESH_ATTRIBUTE_FLAG_NORMAL_ARRAY = 1<<1,
COGL_MESH_ATTRIBUTE_FLAG_TEXTURE_COORD_ARRAY = 1<<2,
COGL_MESH_ATTRIBUTE_FLAG_VERTEX_ARRAY = 1<<3,
COGL_MESH_ATTRIBUTE_FLAG_CUSTOM_ARRAY = 1<<4,
COGL_MESH_ATTRIBUTE_FLAG_INVALID = 1<<5,
COGL_MESH_ATTRIBUTE_FLAG_NORMALIZED = 1<<6,
COGL_MESH_ATTRIBUTE_FLAG_ENABLED = 1<<7,
/* Usage hints */
/* FIXME - flatten into one flag, since its used as a boolean */
COGL_MESH_ATTRIBUTE_FLAG_INFREQUENT_RESUBMIT = 1<<8,
COGL_MESH_ATTRIBUTE_FLAG_FREQUENT_RESUBMIT = 1<<9,
/* GL Data types */
/* NB: Update the _GL_TYPE_MASK below if these are changed */
COGL_MESH_ATTRIBUTE_FLAG_GL_TYPE_BYTE = 1<<10,
COGL_MESH_ATTRIBUTE_FLAG_GL_TYPE_UNSIGNED_BYTE = 1<<11,
COGL_MESH_ATTRIBUTE_FLAG_GL_TYPE_SHORT = 1<<12,
COGL_MESH_ATTRIBUTE_FLAG_GL_TYPE_UNSIGNED_SHORT = 1<<13,
COGL_MESH_ATTRIBUTE_FLAG_GL_TYPE_INT = 1<<14,
COGL_MESH_ATTRIBUTE_FLAG_GL_TYPE_UNSIGNED_INT = 1<<15,
COGL_MESH_ATTRIBUTE_FLAG_GL_TYPE_FLOAT = 1<<16,
COGL_MESH_ATTRIBUTE_FLAG_GL_TYPE_DOUBLE = 1<<17,
COGL_MESH_ATTRIBUTE_FLAG_SUBMITTED = 1<<18,
COGL_MESH_ATTRIBUTE_FLAG_UNUSED = 1<<19
/* XXX NB: If we need > 24 bits then look at changing the layout
* of struct _CoglMeshAttribute below */
} CoglMeshAttributeFlags;
#define COGL_MESH_ATTRIBUTE_FLAG_TYPE_MASK \
(COGL_MESH_ATTRIBUTE_FLAG_COLOR_ARRAY \
| COGL_MESH_ATTRIBUTE_FLAG_NORMAL_ARRAY \
| COGL_MESH_ATTRIBUTE_FLAG_TEXTURE_COORD_ARRAY \
| COGL_MESH_ATTRIBUTE_FLAG_VERTEX_ARRAY \
| COGL_MESH_ATTRIBUTE_FLAG_CUSTOM_ARRAY \
| COGL_MESH_ATTRIBUTE_FLAG_INVALID)
#define COGL_MESH_ATTRIBUTE_FLAG_GL_TYPE_MASK \
(COGL_MESH_ATTRIBUTE_FLAG_GL_TYPE_BYTE \
| COGL_MESH_ATTRIBUTE_FLAG_GL_TYPE_UNSIGNED_BYTE \
| COGL_MESH_ATTRIBUTE_FLAG_GL_TYPE_SHORT \
| COGL_MESH_ATTRIBUTE_FLAG_GL_TYPE_UNSIGNED_SHORT \
| COGL_MESH_ATTRIBUTE_FLAG_GL_TYPE_INT \
| COGL_MESH_ATTRIBUTE_FLAG_GL_TYPE_UNSIGNED_INT \
| COGL_MESH_ATTRIBUTE_FLAG_GL_TYPE_FLOAT \
| COGL_MESH_ATTRIBUTE_FLAG_GL_TYPE_DOUBLE)
typedef struct _CoglMeshAttribute
{
/* TODO: look at breaking up the flags into seperate
* bitfields and seperate enums */
CoglMeshAttributeFlags flags:24;
guint8 id;
GQuark name;
union _u
{
const void *pointer;
gsize vbo_offset;
} u;
gsize span_bytes;
guint16 stride;
guint8 n_components;
guint8 texture_unit;
} CoglMeshAttribute;
typedef enum _CoglMeshVBOFlags
{
COGL_MESH_VBO_FLAG_UNSTRIDED = 1<<0,
COGL_MESH_VBO_FLAG_STRIDED = 1<<1,
COGL_MESH_VBO_FLAG_MULTIPACK = 1<<2,
/* FIXME - flatten into one flag, since its used as a boolean */
COGL_MESH_VBO_FLAG_INFREQUENT_RESUBMIT = 1<<3,
COGL_MESH_VBO_FLAG_FREQUENT_RESUBMIT = 1<<4,
COGL_MESH_VBO_FLAG_SUBMITTED = 1<<5
} CoglMeshVBOFlags;
/*
* A CoglMeshVBO represents one or more attributes in a single buffer object
*/
typedef struct _CoglMeshVBO
{
CoglMeshVBOFlags flags;
GLuint vbo_name; /*!< The name of the corresponding buffer object */
gsize vbo_bytes; /*!< The lengh of the allocated buffer object in bytes */
GList *attributes;
} CoglMeshVBO;
typedef struct _CoglMesh
{
guint ref_count;
guint n_vertices; /*!< The number of vertices in the mesh */
GList *submitted_vbos; /* The VBOs currently submitted to the GPU */
/* Note: new_attributes is normally NULL and only valid while
* modifying a mesh object. */
GList *new_attributes; /*!< attributes pending submission */
} CoglMesh;
#endif /* __COGL_MESH_H */