mutter/gles/cogl-fbo.c

189 lines
4.5 KiB
C

/*
* Clutter COGL
*
* A basic GL/GLES Abstraction/Utility Layer
*
* Authored By Matthew Allum <mallum@openedhand.com>
*
* Copyright (C) 2007 OpenedHand
*
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cogl.h"
#include "cogl-internal.h"
#include "cogl-util.h"
#include "cogl-texture.h"
#include "cogl-fbo.h"
#include "cogl-context.h"
/* Expecting EXT functions not to be defined - redirect to pointers in context */
#define glGenRenderbuffersEXT ctx->pf_glGenRenderbuffersEXT
#define glBindRenderbufferEXT ctx->pf_glBindRenderbufferEXT
#define glRenderbufferStorageEXT ctx->pf_glRenderbufferStorageEXT
#define glGenFramebuffersEXT ctx->pf_glGenFramebuffersEXT
#define glBindFramebufferEXT ctx->pf_glBindFramebufferEXT
#define glFramebufferTexture2DEXT ctx->pf_glFramebufferTexture2DEXT
#define glFramebufferRenderbufferEXT ctx->pf_glFramebufferRenderbufferEXT
#define glCheckFramebufferStatusEXT ctx->pf_glCheckFramebufferStatusEXT
#define glDeleteFramebuffersEXT ctx->pf_glDeleteFramebuffersEXT
#define glBlitFramebufferEXT ctx->pf_glBlitFramebufferEXT
#define glRenderbufferStorageMultisampleEXT ctx->pf_glRenderbufferStorageMultisampleEXT
static gint
_cogl_fbo_handle_find (CoglHandle handle)
{
_COGL_GET_CONTEXT (ctx, -1);
gint i;
if (ctx->fbo_handles == NULL)
return -1;
for (i=0; i < ctx->fbo_handles->len; ++i)
if (g_array_index (ctx->fbo_handles, CoglHandle, i) == handle)
return i;
return -1;
}
/*
static CoglHandle
_cogl_fbo_handle_new (CoglFbo *fbo)
{
_COGL_GET_CONTEXT (ctx, COGL_INVALID_HANDLE);
CoglHandle handle = (CoglHandle)fbo;
if (ctx->fbo_handles == NULL)
ctx->fbo_handles = g_array_new (FALSE, FALSE, sizeof (CoglHandle));
g_array_append_val (ctx->fbo_handles, handle);
return handle;
}
static void
_cogl_fbo_handle_release (CoglHandle handle)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
gint i;
if ( (i = _cogl_fbo_handle_find (handle)) == -1)
return;
g_array_remove_index_fast (ctx->fbo_handles, i);
}
static CoglFbo*
_cogl_fbo_pointer_from_handle (CoglHandle handle)
{
return (CoglFbo*) handle;
}*/
gboolean
cogl_is_offscreen_buffer (CoglHandle handle)
{
if (handle == COGL_INVALID_HANDLE)
return FALSE;
return _cogl_fbo_handle_find (handle) >= 0;
}
CoglHandle
cogl_offscreen_new_to_texture (CoglHandle texhandle)
{
return COGL_INVALID_HANDLE;
}
CoglHandle
cogl_offscreen_new_multisample ()
{
return COGL_INVALID_HANDLE;
}
CoglHandle
cogl_offscreen_ref (CoglHandle handle)
{
return COGL_INVALID_HANDLE;
}
void
cogl_offscreen_unref (CoglHandle handle)
{
}
void
cogl_offscreen_blit_region (CoglHandle src_buffer,
CoglHandle dst_buffer,
int src_x,
int src_y,
int src_w,
int src_h,
int dst_x,
int dst_y,
int dst_w,
int dst_h)
{
}
void
cogl_offscreen_blit (CoglHandle src_buffer,
CoglHandle dst_buffer)
{
}
void
cogl_draw_buffer (CoglBufferTarget target, CoglHandle offscreen)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
switch (target)
{
case COGL_OFFSCREEN_BUFFER:
/* Not supported */
return;
case COGL_WINDOW_BUFFER:
/* Draw to RGB channels */
GE( glColorMask (GL_TRUE, GL_TRUE, GL_TRUE, GL_FALSE) );
break;
case COGL_MASK_BUFFER:
/* Draw only to ALPHA channel */
GE( glColorMask (GL_FALSE, GL_FALSE, GL_FALSE, GL_TRUE) );
break;
case COGL_WINDOW_BUFFER & COGL_MASK_BUFFER:
/* Draw to all channels */
GE( glColorMask (GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE) );
break;
}
/* Store new target */
ctx->draw_buffer = target;
}