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/*
* texture rectangle
*
* A small utility function to help create a rectangle texture
*
* Authored By Neil Roberts <neil@linux.intel.com>
*
* Copyright (C) 2011, 2012 Intel Corporation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street - Suite 500, Boston, MA
* 02110-1335, USA.
*/
#include <config.h>
#include <clutter/clutter.h>
#include "meta-texture-rectangle.h"
LOCAL_SYMBOL CoglTexture *
meta_texture_rectangle_new (unsigned int width,
unsigned int height,
CoglPixelFormat format,
CoglPixelFormat internal_format,
unsigned int rowstride,
const guint8 *data)
{
ClutterBackend *backend =
clutter_get_default_backend ();
CoglContext *context =
clutter_backend_get_cogl_context (backend);
CoglTextureRectangle *tex_rect;
#if COGL_VERSION_CHECK (1, 17, 2)
tex_rect = cogl_texture_rectangle_new_with_size (context, width, height);
#else
tex_rect = cogl_texture_rectangle_new_with_size (context,
width, height,
internal_format,
NULL);
#endif
if (tex_rect == NULL)
return NULL;
if (data)
cogl_texture_set_region (COGL_TEXTURE (tex_rect),
0, 0, /* src_x/y */
0, 0, /* dst_x/y */
width, height, /* dst_width/height */
width, height, /* width/height */
format,
rowstride,
data);
return COGL_TEXTURE (tex_rect);
}
static void
texture_rectangle_check_cb (CoglTexture *sub_texture,
const float *sub_texture_coords,
const float *meta_coords,
void *user_data)
{
gboolean *result = user_data;
if (cogl_is_texture_rectangle (sub_texture))
*result = TRUE;
}
/* Determines if the given texture is using a rectangle texture as its
* primitive texture type. Eventually this function could be replaced
* with cogl_texture_get_type if Cogl makes that public.
*
* http://git.gnome.org/browse/cogl/commit/?h=8012eee31
*/
LOCAL_SYMBOL gboolean
meta_texture_rectangle_check (CoglTexture *texture)
{
gboolean result = FALSE;
cogl_meta_texture_foreach_in_region (COGL_META_TEXTURE (texture),
0.0f, 0.0f, /* tx_1 / ty_1 */
1.0f, 1.0f, /* tx_2 / ty_2 */
COGL_PIPELINE_WRAP_MODE_REPEAT,
COGL_PIPELINE_WRAP_MODE_REPEAT,
texture_rectangle_check_cb,
&result);
return result;
}