mirror of
https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-11-14 04:31:09 +00:00
81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
/* gskglbufferprivate.h
|
|
*
|
|
* Copyright 2020 Christian Hergert <chergert@redhat.com>
|
|
*
|
|
* This file 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 2.1 of the License, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This file 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 General Public License along
|
|
* with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
* SPDX-License-Identifier: LGPL-2.1-or-later
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "gskgltypesprivate.h"
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
typedef struct _GskGLBuffer
|
|
{
|
|
guint8 *buffer;
|
|
gsize buffer_pos;
|
|
gsize buffer_len;
|
|
guint count;
|
|
GLenum target;
|
|
gsize element_size;
|
|
} GskGLBuffer;
|
|
|
|
void gsk_gl_buffer_init (GskGLBuffer *self,
|
|
GLenum target,
|
|
guint element_size);
|
|
void gsk_gl_buffer_destroy (GskGLBuffer *buffer);
|
|
GLuint gsk_gl_buffer_submit (GskGLBuffer *buffer);
|
|
|
|
static inline gpointer
|
|
gsk_gl_buffer_advance (GskGLBuffer *buffer,
|
|
guint count)
|
|
{
|
|
gpointer ret;
|
|
gsize to_alloc = count * buffer->element_size;
|
|
|
|
if G_UNLIKELY (buffer->buffer_pos + to_alloc > buffer->buffer_len)
|
|
{
|
|
while (buffer->buffer_pos + to_alloc > buffer->buffer_len)
|
|
buffer->buffer_len *= 2;
|
|
buffer->buffer = g_realloc (buffer->buffer, buffer->buffer_len);
|
|
}
|
|
|
|
ret = buffer->buffer + buffer->buffer_pos;
|
|
|
|
buffer->buffer_pos += to_alloc;
|
|
buffer->count += count;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline void
|
|
gsk_gl_buffer_retract (GskGLBuffer *buffer,
|
|
guint count)
|
|
{
|
|
buffer->buffer_pos -= count * buffer->element_size;
|
|
buffer->count -= count;
|
|
}
|
|
|
|
static inline guint
|
|
gsk_gl_buffer_get_offset (GskGLBuffer *buffer)
|
|
{
|
|
return buffer->count;
|
|
}
|
|
|
|
G_END_DECLS
|
|
|