92d0322766
This allows you to tell Cogl that you are planning to replace all the buffer's data once it is mapped with cogl_buffer_map. This means if the buffer is currently being accessed by the GPU then the driver doesn't have to stall and wait for it to finish before it can access it from the CPU and can instead potentially allocate a new buffer with undefined data and map that.
132 lines
3.9 KiB
C
132 lines
3.9 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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#define COGL_BUFFER_SET_FLAG(buffer, flag) \
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((buffer)->flags |= (COGL_BUFFER_FLAG_ ## flag))
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#define COGL_BUFFER_CLEAR_FLAG(buffer, flag) \
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((buffer)->flags &= ~(COGL_BUFFER_FLAG_ ## flag))
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#define COGL_BUFFER_FLAG_IS_SET(buffer, flag) \
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((buffer)->flags & (COGL_BUFFER_FLAG_ ## flag))
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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_VERTICES
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} CoglBufferUsageHint;
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struct _CoglBuffer
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{
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CoglObject _parent;
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const CoglBufferVtable *vtable;
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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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};
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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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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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GLenum target);
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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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