70 lines
2.0 KiB
C
70 lines
2.0 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
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <string.h>
|
|
|
|
#include "gskglbufferprivate.h"
|
|
|
|
/**
|
|
* gsk_gl_buffer_init:
|
|
* @target: the target buffer such as %GL_ARRAY_BUFFER or %GL_UNIFORM_BUFFER
|
|
* @element_size: the size of elements within the buffer
|
|
*
|
|
* Creates a new `GskGLBuffer` which can be used to deliver data to shaders
|
|
* within a GLSL program. You can use this to store vertices such as with
|
|
* %GL_ARRAY_BUFFER or uniform data with %GL_UNIFORM_BUFFER.
|
|
*/
|
|
void
|
|
gsk_gl_buffer_init (GskGLBuffer *self,
|
|
GLenum target,
|
|
guint element_size)
|
|
{
|
|
memset (self, 0, sizeof *self);
|
|
|
|
/* Default to 2 pages, power-of-two growth from there */
|
|
self->buffer_len = 4096 * 2;
|
|
self->buffer = g_malloc (self->buffer_len);
|
|
self->target = target;
|
|
self->element_size = element_size;
|
|
}
|
|
|
|
GLuint
|
|
gsk_gl_buffer_submit (GskGLBuffer *buffer)
|
|
{
|
|
GLuint id;
|
|
|
|
glGenBuffers (1, &id);
|
|
glBindBuffer (buffer->target, id);
|
|
glBufferData (buffer->target, buffer->buffer_pos, buffer->buffer, GL_STATIC_DRAW);
|
|
|
|
buffer->buffer_pos = 0;
|
|
buffer->count = 0;
|
|
|
|
return id;
|
|
}
|
|
|
|
void
|
|
gsk_gl_buffer_destroy (GskGLBuffer *buffer)
|
|
{
|
|
g_clear_pointer (&buffer->buffer, g_free);
|
|
}
|