mirror of
https://github.com/brl/mutter.git
synced 2024-12-26 12:52:14 +00:00
da3be3df6b
This adds a new API call to enable point sprite coordinate generation
for a material layer:
void
cogl_material_set_layer_point_sprite_coords_enabled (CoglHandle material,
int layer_index,
gboolean enable);
There is also a corresponding get function.
Enabling point sprite coords simply sets the GL_COORD_REPLACE of the
GL_POINT_SPRITE glTexEnv when flusing the material. There is no
separate application control for glEnable(GL_POINT_SPRITE). Instead it
is left permanently enabled under the assumption that it has no affect
unless GL_COORD_REPLACE is enabled for a texture unit.
http://bugzilla.openedhand.com/show_bug.cgi?id=2047
118 lines
3.8 KiB
C
118 lines
3.8 KiB
C
/*
|
|
* Cogl
|
|
*
|
|
* An object oriented GL/GLES Abstraction/Utility Layer
|
|
*
|
|
* Copyright (C) 2007,2008,2009 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 <string.h>
|
|
|
|
#include "cogl.h"
|
|
#include "cogl-internal.h"
|
|
#include "cogl-context.h"
|
|
#include "cogl-feature-private.h"
|
|
|
|
gboolean
|
|
_cogl_check_driver_valid (GError **error)
|
|
{
|
|
/* The GLES backend doesn't have any particular version requirements */
|
|
return TRUE;
|
|
}
|
|
|
|
/* Define a set of arrays containing the functions required from GL
|
|
for each feature */
|
|
#define COGL_FEATURE_BEGIN(name, min_gl_major, min_gl_minor, \
|
|
namespaces, extension_names, \
|
|
feature_flags, feature_flags_private) \
|
|
static const CoglFeatureFunction cogl_feature_ ## name ## _funcs[] = {
|
|
#define COGL_FEATURE_FUNCTION(ret, name, args) \
|
|
{ G_STRINGIFY (name), G_STRUCT_OFFSET (CoglContext, drv.pf_ ## name) },
|
|
#define COGL_FEATURE_END() \
|
|
{ NULL, 0 }, \
|
|
};
|
|
#include "cogl-feature-functions.h"
|
|
|
|
/* Define an array of features */
|
|
#undef COGL_FEATURE_BEGIN
|
|
#define COGL_FEATURE_BEGIN(name, min_gl_major, min_gl_minor, \
|
|
namespaces, extension_names, \
|
|
feature_flags, feature_flags_private) \
|
|
{ min_gl_major, min_gl_minor, namespaces, \
|
|
extension_names, feature_flags, feature_flags_private, \
|
|
cogl_feature_ ## name ## _funcs },
|
|
#undef COGL_FEATURE_FUNCTION
|
|
#define COGL_FEATURE_FUNCTION(ret, name, args)
|
|
#undef COGL_FEATURE_END
|
|
#define COGL_FEATURE_END()
|
|
|
|
static const CoglFeatureData cogl_feature_data[] =
|
|
{
|
|
#include "cogl-feature-functions.h"
|
|
};
|
|
|
|
void
|
|
_cogl_features_init (void)
|
|
{
|
|
CoglFeatureFlags flags = 0;
|
|
int max_clip_planes = 0;
|
|
GLint num_stencil_bits = 0;
|
|
const char *gl_extensions;
|
|
int i;
|
|
|
|
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
|
|
|
|
gl_extensions = (const char*) glGetString (GL_EXTENSIONS);
|
|
|
|
for (i = 0; i < G_N_ELEMENTS (cogl_feature_data); i++)
|
|
if (_cogl_feature_check ("GL", cogl_feature_data + i,
|
|
0, 0,
|
|
gl_extensions))
|
|
flags |= cogl_feature_data[i].feature_flags;
|
|
|
|
GE( glGetIntegerv (GL_STENCIL_BITS, &num_stencil_bits) );
|
|
/* We need at least three stencil bits to combine clips */
|
|
if (num_stencil_bits > 2)
|
|
flags |= COGL_FEATURE_STENCIL_BUFFER;
|
|
|
|
GE( glGetIntegerv (GL_MAX_CLIP_PLANES, &max_clip_planes) );
|
|
if (max_clip_planes >= 4)
|
|
flags |= COGL_FEATURE_FOUR_CLIP_PLANES;
|
|
|
|
#ifdef HAVE_COGL_GLES2
|
|
flags |= COGL_FEATURE_SHADERS_GLSL | COGL_FEATURE_OFFSCREEN;
|
|
/* Note GLES 2 core doesn't support mipmaps for npot textures or
|
|
* repeat modes other than CLAMP_TO_EDGE. */
|
|
flags |= COGL_FEATURE_TEXTURE_NPOT_BASIC;
|
|
#endif
|
|
|
|
flags |= COGL_FEATURE_VBOS;
|
|
|
|
/* Both GLES 1.1 and GLES 2.0 support point sprites in core */
|
|
flags |= COGL_FEATURE_POINT_SPRITE;
|
|
|
|
/* Cache features */
|
|
ctx->feature_flags = flags;
|
|
ctx->features_cached = TRUE;
|
|
}
|
|
|