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c5644723f8
Previously the private feature flags were stored in an enum and we already had 31 flags. Adding the 32nd flag would presumably make it add -2³¹ as one of the values which might cause problems. To avoid this we'll just use an fixed-size array of longs and use indices for the enum values like we do for the public features. A slight complication with this is in the CoglDriverDescription where we were previously using a static intialised value to describe the set of features that the driver supports. We can't easily do this with the flags array so instead the features are stored in a fixed-size array of indices. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit d94cb984e3c93630f3c2e6e3be9d189672aa20f3) Conflicts: cogl/cogl-context-private.h cogl/cogl-context.c cogl/cogl-private.h cogl/cogl-renderer.c cogl/driver/gl/cogl-pipeline-opengl.c cogl/driver/gl/gl/cogl-driver-gl.c cogl/driver/gl/gl/cogl-pipeline-progend-fixed-arbfp.c cogl/driver/gl/gles/cogl-driver-gles.c cogl/driver/nop/cogl-driver-nop.c
366 lines
12 KiB
C
366 lines
12 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2012 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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*
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* Authors:
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* Neil Roberts <neil@linux.intel.com>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "cogl-sampler-cache-private.h"
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#include "cogl-context-private.h"
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#include "cogl-util-gl-private.h"
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#ifndef GL_TEXTURE_WRAP_R
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#define GL_TEXTURE_WRAP_R 0x8072
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#endif
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struct _CoglSamplerCache
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{
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CoglContext *context;
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/* The samplers are hashed in two tables. One is using the enum
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values that Cogl exposes (so it can include the 'automatic' wrap
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mode) and the other is using the converted values that will be
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given to GL. The first is used to get a unique pointer for the
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sampler state so that pipelines only need to store a single
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pointer instead of the whole state and the second is used so that
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only a single GL sampler object will be created for each unique
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GL state. */
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GHashTable *hash_table_cogl;
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GHashTable *hash_table_gl;
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/* This is used for generated fake unique sampler object numbers
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when the sampler object extension is not supported */
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GLuint next_fake_sampler_object_number;
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};
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static CoglSamplerCacheWrapMode
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get_real_wrap_mode (CoglSamplerCacheWrapMode wrap_mode)
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{
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if (wrap_mode == COGL_SAMPLER_CACHE_WRAP_MODE_AUTOMATIC)
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return COGL_SAMPLER_CACHE_WRAP_MODE_CLAMP_TO_EDGE;
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return wrap_mode;
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}
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static void
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canonicalize_key (CoglSamplerCacheEntry *key)
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{
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/* This converts the wrap modes to the enums that will actually be
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given to GL so that it can be used as a key to get a unique GL
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sampler object for the state */
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key->wrap_mode_s = get_real_wrap_mode (key->wrap_mode_s);
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key->wrap_mode_t = get_real_wrap_mode (key->wrap_mode_t);
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key->wrap_mode_p = get_real_wrap_mode (key->wrap_mode_p);
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}
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static CoglBool
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wrap_mode_equal_gl (CoglSamplerCacheWrapMode wrap_mode0,
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CoglSamplerCacheWrapMode wrap_mode1)
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{
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/* We want to compare the actual GLenum that will be used so that if
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two different wrap_modes actually use the same GL state we'll
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still use the same sampler object */
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return get_real_wrap_mode (wrap_mode0) == get_real_wrap_mode (wrap_mode1);
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}
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static CoglBool
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sampler_state_equal_gl (const void *value0,
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const void *value1)
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{
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const CoglSamplerCacheEntry *state0 = value0;
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const CoglSamplerCacheEntry *state1 = value1;
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return (state0->mag_filter == state1->mag_filter &&
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state0->min_filter == state1->min_filter &&
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wrap_mode_equal_gl (state0->wrap_mode_s, state1->wrap_mode_s) &&
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wrap_mode_equal_gl (state0->wrap_mode_t, state1->wrap_mode_t) &&
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wrap_mode_equal_gl (state0->wrap_mode_p, state1->wrap_mode_p));
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}
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static unsigned int
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hash_wrap_mode_gl (unsigned int hash,
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CoglSamplerCacheWrapMode wrap_mode)
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{
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/* We want to hash the actual GLenum that will be used so that if
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two different wrap_modes actually use the same GL state we'll
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still use the same sampler object */
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GLenum real_wrap_mode = get_real_wrap_mode (wrap_mode);
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return _cogl_util_one_at_a_time_hash (hash,
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&real_wrap_mode,
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sizeof (real_wrap_mode));
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}
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static unsigned int
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hash_sampler_state_gl (const void *key)
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{
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const CoglSamplerCacheEntry *entry = key;
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unsigned int hash = 0;
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hash = _cogl_util_one_at_a_time_hash (hash, &entry->mag_filter,
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sizeof (entry->mag_filter));
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hash = _cogl_util_one_at_a_time_hash (hash, &entry->min_filter,
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sizeof (entry->min_filter));
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hash = hash_wrap_mode_gl (hash, entry->wrap_mode_s);
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hash = hash_wrap_mode_gl (hash, entry->wrap_mode_t);
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hash = hash_wrap_mode_gl (hash, entry->wrap_mode_p);
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return _cogl_util_one_at_a_time_mix (hash);
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}
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static CoglBool
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sampler_state_equal_cogl (const void *value0,
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const void *value1)
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{
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const CoglSamplerCacheEntry *state0 = value0;
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const CoglSamplerCacheEntry *state1 = value1;
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return (state0->mag_filter == state1->mag_filter &&
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state0->min_filter == state1->min_filter &&
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state0->wrap_mode_s == state1->wrap_mode_s &&
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state0->wrap_mode_t == state1->wrap_mode_t &&
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state0->wrap_mode_p == state1->wrap_mode_p);
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}
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static unsigned int
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hash_sampler_state_cogl (const void *key)
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{
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const CoglSamplerCacheEntry *entry = key;
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unsigned int hash = 0;
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hash = _cogl_util_one_at_a_time_hash (hash, &entry->mag_filter,
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sizeof (entry->mag_filter));
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hash = _cogl_util_one_at_a_time_hash (hash, &entry->min_filter,
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sizeof (entry->min_filter));
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hash = _cogl_util_one_at_a_time_hash (hash, &entry->wrap_mode_s,
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sizeof (entry->wrap_mode_s));
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hash = _cogl_util_one_at_a_time_hash (hash, &entry->wrap_mode_t,
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sizeof (entry->wrap_mode_t));
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hash = _cogl_util_one_at_a_time_hash (hash, &entry->wrap_mode_p,
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sizeof (entry->wrap_mode_p));
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return _cogl_util_one_at_a_time_mix (hash);
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}
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CoglSamplerCache *
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_cogl_sampler_cache_new (CoglContext *context)
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{
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CoglSamplerCache *cache = g_new (CoglSamplerCache, 1);
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/* No reference is taken on the context because it would create a
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circular reference */
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cache->context = context;
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cache->hash_table_gl = g_hash_table_new (hash_sampler_state_gl,
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sampler_state_equal_gl);
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cache->hash_table_cogl = g_hash_table_new (hash_sampler_state_cogl,
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sampler_state_equal_cogl);
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cache->next_fake_sampler_object_number = 1;
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return cache;
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}
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static void
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set_wrap_mode (CoglContext *context,
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GLuint sampler_object,
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GLenum param,
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CoglSamplerCacheWrapMode wrap_mode)
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{
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GE( context, glSamplerParameteri (sampler_object,
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param,
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wrap_mode) );
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}
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static CoglSamplerCacheEntry *
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_cogl_sampler_cache_get_entry_gl (CoglSamplerCache *cache,
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const CoglSamplerCacheEntry *key)
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{
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CoglSamplerCacheEntry *entry;
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entry = g_hash_table_lookup (cache->hash_table_gl, key);
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if (entry == NULL)
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{
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CoglContext *context = cache->context;
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entry = g_slice_dup (CoglSamplerCacheEntry, key);
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if (_cogl_has_private_feature (context,
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COGL_PRIVATE_FEATURE_SAMPLER_OBJECTS))
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{
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GE( context, glGenSamplers (1, &entry->sampler_object) );
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GE( context, glSamplerParameteri (entry->sampler_object,
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GL_TEXTURE_MIN_FILTER,
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entry->min_filter) );
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GE( context, glSamplerParameteri (entry->sampler_object,
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GL_TEXTURE_MAG_FILTER,
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entry->mag_filter) );
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set_wrap_mode (context,
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entry->sampler_object,
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GL_TEXTURE_WRAP_S,
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entry->wrap_mode_s);
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set_wrap_mode (context,
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entry->sampler_object,
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GL_TEXTURE_WRAP_T,
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entry->wrap_mode_t);
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set_wrap_mode (context,
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entry->sampler_object,
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GL_TEXTURE_WRAP_R,
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entry->wrap_mode_p);
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}
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else
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{
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/* If sampler objects aren't supported then we'll invent a
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unique number so that pipelines can still compare the
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unique state just by comparing the sampler object
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numbers */
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entry->sampler_object = cache->next_fake_sampler_object_number++;
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}
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g_hash_table_insert (cache->hash_table_gl, entry, entry);
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}
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return entry;
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}
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static CoglSamplerCacheEntry *
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_cogl_sampler_cache_get_entry_cogl (CoglSamplerCache *cache,
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const CoglSamplerCacheEntry *key)
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{
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CoglSamplerCacheEntry *entry;
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entry = g_hash_table_lookup (cache->hash_table_cogl, key);
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if (entry == NULL)
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{
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CoglSamplerCacheEntry canonical_key;
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CoglSamplerCacheEntry *gl_entry;
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entry = g_slice_dup (CoglSamplerCacheEntry, key);
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/* Get the sampler object number from the canonical GL version
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of the sampler state cache */
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canonical_key = *key;
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canonicalize_key (&canonical_key);
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gl_entry = _cogl_sampler_cache_get_entry_gl (cache, &canonical_key);
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entry->sampler_object = gl_entry->sampler_object;
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g_hash_table_insert (cache->hash_table_cogl, entry, entry);
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}
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return entry;
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}
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const CoglSamplerCacheEntry *
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_cogl_sampler_cache_get_default_entry (CoglSamplerCache *cache)
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{
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CoglSamplerCacheEntry key;
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key.wrap_mode_s = COGL_SAMPLER_CACHE_WRAP_MODE_AUTOMATIC;
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key.wrap_mode_t = COGL_SAMPLER_CACHE_WRAP_MODE_AUTOMATIC;
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key.wrap_mode_p = COGL_SAMPLER_CACHE_WRAP_MODE_AUTOMATIC;
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key.min_filter = GL_LINEAR;
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key.mag_filter = GL_LINEAR;
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return _cogl_sampler_cache_get_entry_cogl (cache, &key);
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}
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const CoglSamplerCacheEntry *
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_cogl_sampler_cache_update_wrap_modes (CoglSamplerCache *cache,
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const CoglSamplerCacheEntry *old_entry,
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CoglSamplerCacheWrapMode wrap_mode_s,
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CoglSamplerCacheWrapMode wrap_mode_t,
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CoglSamplerCacheWrapMode wrap_mode_p)
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{
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CoglSamplerCacheEntry key = *old_entry;
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key.wrap_mode_s = wrap_mode_s;
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key.wrap_mode_t = wrap_mode_t;
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key.wrap_mode_p = wrap_mode_p;
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return _cogl_sampler_cache_get_entry_cogl (cache, &key);
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}
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const CoglSamplerCacheEntry *
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_cogl_sampler_cache_update_filters (CoglSamplerCache *cache,
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const CoglSamplerCacheEntry *old_entry,
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GLenum min_filter,
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GLenum mag_filter)
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{
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CoglSamplerCacheEntry key = *old_entry;
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key.min_filter = min_filter;
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key.mag_filter = mag_filter;
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return _cogl_sampler_cache_get_entry_cogl (cache, &key);
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}
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static void
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hash_table_free_gl_cb (void *key,
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void *value,
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void *user_data)
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{
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CoglContext *context = user_data;
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CoglSamplerCacheEntry *entry = value;
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if (_cogl_has_private_feature (context,
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COGL_PRIVATE_FEATURE_SAMPLER_OBJECTS))
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GE( context, glDeleteSamplers (1, &entry->sampler_object) );
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g_slice_free (CoglSamplerCacheEntry, entry);
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}
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static void
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hash_table_free_cogl_cb (void *key,
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void *value,
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void *user_data)
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{
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CoglSamplerCacheEntry *entry = value;
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g_slice_free (CoglSamplerCacheEntry, entry);
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}
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void
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_cogl_sampler_cache_free (CoglSamplerCache *cache)
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{
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g_hash_table_foreach (cache->hash_table_gl,
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hash_table_free_gl_cb,
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cache->context);
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g_hash_table_destroy (cache->hash_table_gl);
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g_hash_table_foreach (cache->hash_table_cogl,
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hash_table_free_cogl_cb,
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cache->context);
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g_hash_table_destroy (cache->hash_table_cogl);
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g_free (cache);
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}
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