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Previously indices were tightly bound to a particular Cogl vertex buffer but we would like to be able to share indices so now we have cogl_vertex_buffer_indices_new () which returns a CoglHandle. In particular we could like to have a shared set of indices for drawing lists of quads that can be shared between the pango renderer and the Cogl journal.
166 lines
5.6 KiB
C
166 lines
5.6 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2008,2009 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* Authors:
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* Robert Bragg <robert@linux.intel.com>
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*/
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#ifndef __COGL_VERTEX_BUFFER_H
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#define __COGL_VERTEX_BUFFER_H
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#include "cogl-handle.h"
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#include <glib.h>
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/* Note we put quite a bit into the flags here to help keep
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* the down size of the CoglVertexBufferAttrib struct below. */
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typedef enum _CoglVertexBufferAttribFlags
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{
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/* Types */
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/* NB: update the _TYPE_MASK below if these are changed */
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COGL_VERTEX_BUFFER_ATTRIB_FLAG_COLOR_ARRAY = 1<<0,
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COGL_VERTEX_BUFFER_ATTRIB_FLAG_NORMAL_ARRAY = 1<<1,
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COGL_VERTEX_BUFFER_ATTRIB_FLAG_TEXTURE_COORD_ARRAY = 1<<2,
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COGL_VERTEX_BUFFER_ATTRIB_FLAG_VERTEX_ARRAY = 1<<3,
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COGL_VERTEX_BUFFER_ATTRIB_FLAG_CUSTOM_ARRAY = 1<<4,
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COGL_VERTEX_BUFFER_ATTRIB_FLAG_INVALID = 1<<5,
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COGL_VERTEX_BUFFER_ATTRIB_FLAG_NORMALIZED = 1<<6,
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COGL_VERTEX_BUFFER_ATTRIB_FLAG_ENABLED = 1<<7,
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/* Usage hints */
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/* FIXME - flatten into one flag, since its used as a boolean */
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COGL_VERTEX_BUFFER_ATTRIB_FLAG_INFREQUENT_RESUBMIT = 1<<8,
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COGL_VERTEX_BUFFER_ATTRIB_FLAG_FREQUENT_RESUBMIT = 1<<9,
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/* GL Data types */
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/* NB: Update the _GL_TYPE_MASK below if these are changed */
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COGL_VERTEX_BUFFER_ATTRIB_FLAG_GL_TYPE_BYTE = 1<<10,
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COGL_VERTEX_BUFFER_ATTRIB_FLAG_GL_TYPE_UNSIGNED_BYTE = 1<<11,
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COGL_VERTEX_BUFFER_ATTRIB_FLAG_GL_TYPE_SHORT = 1<<12,
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COGL_VERTEX_BUFFER_ATTRIB_FLAG_GL_TYPE_UNSIGNED_SHORT = 1<<13,
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COGL_VERTEX_BUFFER_ATTRIB_FLAG_GL_TYPE_INT = 1<<14,
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COGL_VERTEX_BUFFER_ATTRIB_FLAG_GL_TYPE_UNSIGNED_INT = 1<<15,
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COGL_VERTEX_BUFFER_ATTRIB_FLAG_GL_TYPE_FLOAT = 1<<16,
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COGL_VERTEX_BUFFER_ATTRIB_FLAG_GL_TYPE_DOUBLE = 1<<17,
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COGL_VERTEX_BUFFER_ATTRIB_FLAG_SUBMITTED = 1<<18,
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COGL_VERTEX_BUFFER_ATTRIB_FLAG_UNUSED = 1<<19
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/* XXX NB: If we need > 24 bits then look at changing the layout
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* of struct _CoglVertexBufferAttrib below */
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} CoglVertexBufferAttribFlags;
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#define COGL_VERTEX_BUFFER_ATTRIB_FLAG_TYPE_MASK \
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(COGL_VERTEX_BUFFER_ATTRIB_FLAG_COLOR_ARRAY \
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| COGL_VERTEX_BUFFER_ATTRIB_FLAG_NORMAL_ARRAY \
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| COGL_VERTEX_BUFFER_ATTRIB_FLAG_TEXTURE_COORD_ARRAY \
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| COGL_VERTEX_BUFFER_ATTRIB_FLAG_VERTEX_ARRAY \
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| COGL_VERTEX_BUFFER_ATTRIB_FLAG_CUSTOM_ARRAY \
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| COGL_VERTEX_BUFFER_ATTRIB_FLAG_INVALID)
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#define COGL_VERTEX_BUFFER_ATTRIB_FLAG_GL_TYPE_MASK \
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(COGL_VERTEX_BUFFER_ATTRIB_FLAG_GL_TYPE_BYTE \
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| COGL_VERTEX_BUFFER_ATTRIB_FLAG_GL_TYPE_UNSIGNED_BYTE \
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| COGL_VERTEX_BUFFER_ATTRIB_FLAG_GL_TYPE_SHORT \
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| COGL_VERTEX_BUFFER_ATTRIB_FLAG_GL_TYPE_UNSIGNED_SHORT \
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| COGL_VERTEX_BUFFER_ATTRIB_FLAG_GL_TYPE_INT \
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| COGL_VERTEX_BUFFER_ATTRIB_FLAG_GL_TYPE_UNSIGNED_INT \
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| COGL_VERTEX_BUFFER_ATTRIB_FLAG_GL_TYPE_FLOAT \
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| COGL_VERTEX_BUFFER_ATTRIB_FLAG_GL_TYPE_DOUBLE)
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typedef struct _CoglVertexBufferAttrib
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{
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/* TODO: look at breaking up the flags into seperate
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* bitfields and seperate enums */
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CoglVertexBufferAttribFlags flags:24;
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guint8 id;
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GQuark name;
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union _u
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{
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const void *pointer;
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size_t vbo_offset;
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} u;
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size_t span_bytes;
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guint16 stride;
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guint8 n_components;
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guint8 texture_unit;
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} CoglVertexBufferAttrib;
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typedef enum _CoglVertexBufferVBOFlags
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{
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COGL_VERTEX_BUFFER_VBO_FLAG_UNSTRIDED = 1<<0,
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COGL_VERTEX_BUFFER_VBO_FLAG_STRIDED = 1<<1,
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COGL_VERTEX_BUFFER_VBO_FLAG_MULTIPACK = 1<<2,
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/* FIXME - flatten into one flag, since its used as a boolean */
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COGL_VERTEX_BUFFER_VBO_FLAG_INFREQUENT_RESUBMIT = 1<<3,
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COGL_VERTEX_BUFFER_VBO_FLAG_FREQUENT_RESUBMIT = 1<<4,
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COGL_VERTEX_BUFFER_VBO_FLAG_SUBMITTED = 1<<5
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} CoglVertexBufferVBOFlags;
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/*
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* A CoglVertexBufferVBO represents one or more attributes in a single
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* buffer object
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*/
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typedef struct _CoglVertexBufferVBO
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{
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CoglVertexBufferVBOFlags flags;
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/* Note: this is a pointer to handle fallbacks. It normally holds
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* a GLuint VBO name, but when the driver doesn't support VBOs then
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* this simply points to an malloc'd buffer. */
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void *vbo_name; /*!< The name of the corresponding buffer object */
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size_t vbo_bytes; /*!< The lengh of the allocated buffer object in bytes */
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GList *attributes;
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} CoglVertexBufferVBO;
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typedef struct _CoglVertexBufferIndices
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{
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CoglHandleObject _parent;
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/* Note: this is a pointer to handle fallbacks. It normally holds
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* a GLuint VBO name, but when the driver doesn't support VBOs then
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* this simply points to an malloc'd buffer. */
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void *vbo_name;
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GLenum type;
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} CoglVertexBufferIndices;
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typedef struct _CoglVertexBuffer
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{
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CoglHandleObject _parent;
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int n_vertices; /*!< The number of vertices in the buffer */
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GList *submitted_vbos; /* The VBOs currently submitted to the GPU */
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/* Note: new_attributes is normally NULL and only valid while
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* modifying a buffer. */
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GList *new_attributes; /*!< attributes pending submission */
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} CoglVertexBuffer;
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#endif /* __COGL_VERTEX_BUFFER_H */
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