7cc6dedea4
We now make _cogl_buffer_bind return a base pointer for the bound buffer which can be used with OpenGL. The pointer will be NULL for GPU based buffers or may point to an malloc'd buffer. Since OpenGL expects an offset instead of a pointer when dealing with buffer objects this means we can handle fallback malloc buffers and GPU buffers in a consistent way.
143 lines
4.2 KiB
C
143 lines
4.2 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) 2010 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, see <http://www.gnu.org/licenses/>.
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*
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*
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*
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* Authors:
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* Damien Lespiau <damien.lespiau@intel.com>
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* Robert Bragg <robert@linux.intel.com>
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*/
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#ifndef __COGL_BUFFER_PRIVATE_H__
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#define __COGL_BUFFER_PRIVATE_H__
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#include <glib.h>
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#include "cogl.h"
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#include "cogl-object.h"
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#include "cogl-buffer.h"
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G_BEGIN_DECLS
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#define COGL_BUFFER(buffer) ((CoglBuffer *)(buffer))
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typedef struct _CoglBufferVtable CoglBufferVtable;
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struct _CoglBufferVtable
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{
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guint8 * (* map) (CoglBuffer *buffer,
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CoglBufferAccess access,
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CoglBufferMapHint hints);
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void (* unmap) (CoglBuffer *buffer);
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gboolean (* set_data) (CoglBuffer *buffer,
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unsigned int offset,
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const guint8 *data,
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unsigned int size);
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};
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typedef enum _CoglBufferFlags
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{
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COGL_BUFFER_FLAG_NONE = 0,
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COGL_BUFFER_FLAG_BUFFER_OBJECT = 1UL << 0, /* real openGL buffer object */
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COGL_BUFFER_FLAG_MAPPED = 1UL << 1
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} CoglBufferFlags;
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typedef enum {
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COGL_BUFFER_USAGE_HINT_TEXTURE,
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COGL_BUFFER_USAGE_HINT_VERTEX_ARRAY,
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COGL_BUFFER_USAGE_HINT_INDEX_ARRAY
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} CoglBufferUsageHint;
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typedef enum {
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COGL_BUFFER_BIND_TARGET_PIXEL_PACK,
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COGL_BUFFER_BIND_TARGET_PIXEL_UNPACK,
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COGL_BUFFER_BIND_TARGET_VERTEX_ARRAY,
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COGL_BUFFER_BIND_TARGET_INDEX_ARRAY,
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COGL_BUFFER_BIND_TARGET_COUNT
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} CoglBufferBindTarget;
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struct _CoglBuffer
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{
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CoglObject _parent;
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CoglBufferVtable vtable;
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CoglBufferBindTarget last_target;
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CoglBufferFlags flags;
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GLuint gl_handle; /* OpenGL handle */
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unsigned int size; /* size of the buffer, in bytes */
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CoglBufferUsageHint usage_hint;
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CoglBufferUpdateHint update_hint;
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guint8 *data; /* points to the mapped memory when
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* the CoglBuffer is a VBO, PBO, ... or
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* points to allocated memory in the
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* fallback paths */
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guint store_created:1;
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};
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/* This is used to register a type to the list of handle types that
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will be considered a texture in cogl_is_texture() */
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void
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_cogl_buffer_register_buffer_type (GQuark type);
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#define COGL_BUFFER_DEFINE(TypeName, type_name) \
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COGL_OBJECT_DEFINE_WITH_CODE \
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(TypeName, type_name, \
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_cogl_buffer_register_buffer_type (_cogl_object_ \
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## type_name ## _get_type ()))
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void
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_cogl_buffer_initialize (CoglBuffer *buffer,
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unsigned int size,
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gboolean use_malloc,
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CoglBufferBindTarget default_target,
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CoglBufferUsageHint usage_hint,
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CoglBufferUpdateHint update_hint);
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void
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_cogl_buffer_fini (CoglBuffer *buffer);
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void *
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_cogl_buffer_bind (CoglBuffer *buffer,
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CoglBufferBindTarget target);
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void
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_cogl_buffer_unbind (CoglBuffer *buffer);
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CoglBufferUsageHint
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_cogl_buffer_get_usage_hint (CoglBuffer *buffer);
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GLenum
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_cogl_buffer_access_to_gl_enum (CoglBufferAccess access);
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GLenum
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_cogl_buffer_hints_to_gl_enum (CoglBufferUsageHint usage_hint,
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CoglBufferUpdateHint update_hint);
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G_END_DECLS
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#endif /* __COGL_BUFFER_PRIVATE_H__ */
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