mutter/cogl/driver/nop/cogl-framebuffer-nop.c
Robert Bragg ae713a32d0 Adds a NOP driver
This adds a new "nop" driver that does nothing. This can be selected at
runtime either with the COGL_DRIVER=nop environment variable or by
passing COGL_DRIVER_NOP to cogl_renderer_set_driver()

Adding the nop driver gives us a way to test workloads without any
driver and hardware overheads which can help us understand how Cogl's
state tracking performs in isolation.

Having a nop driver can also serve as an shell/outline for creating
other drivers later.

Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 90587418233b6438290741d80aedf193ae660cad)
2013-01-22 17:47:59 +00:00

111 lines
3.2 KiB
C

/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2007,2008,2009,2012 Intel Corporation.
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cogl-framebuffer-nop-private.h"
#include <glib.h>
void
_cogl_framebuffer_nop_flush_state (CoglFramebuffer *draw_buffer,
CoglFramebuffer *read_buffer,
CoglFramebufferState state)
{
}
CoglBool
_cogl_offscreen_nop_allocate (CoglOffscreen *offscreen,
CoglError **error)
{
return TRUE;
}
void
_cogl_offscreen_nop_free (CoglOffscreen *offscreen)
{
}
void
_cogl_framebuffer_nop_clear (CoglFramebuffer *framebuffer,
unsigned long buffers,
float red,
float green,
float blue,
float alpha)
{
}
void
_cogl_framebuffer_nop_query_bits (CoglFramebuffer *framebuffer,
int *red,
int *green,
int *blue,
int *alpha)
{
*red = 0;
*green = 0;
*blue = 0;
*alpha = 0;
}
void
_cogl_framebuffer_nop_finish (CoglFramebuffer *framebuffer)
{
}
void
_cogl_framebuffer_nop_discard_buffers (CoglFramebuffer *framebuffer,
unsigned long buffers)
{
}
void
_cogl_framebuffer_nop_draw_attributes (CoglFramebuffer *framebuffer,
CoglPipeline *pipeline,
CoglVerticesMode mode,
int first_vertex,
int n_vertices,
CoglAttribute **attributes,
int n_attributes,
CoglDrawFlags flags)
{
}
void
_cogl_framebuffer_nop_draw_indexed_attributes (CoglFramebuffer *framebuffer,
CoglPipeline *pipeline,
CoglVerticesMode mode,
int first_vertex,
int n_vertices,
CoglIndices *indices,
CoglAttribute **attributes,
int n_attributes,
CoglDrawFlags flags)
{
}