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mutter/cogl/cogl-sampler-cache.c

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Use GL_ARB_sampler_objects GL_ARB_sampler_objects provides a GL object which overrides the sampler state part of a texture object with different values. The sampler state that Cogl currently exposes is the wrap modes and filters. Cogl exposes the state as part of the pipeline layer state but without this extension GL only exposes it as part of the texture object state. This means that it won't work to use a single texture multiple times in one primitive with different sampler states. It also makes switching between different sampler states with a single texture not terribly efficient because it has to change the texture object state every time. This patch adds a cache for sampler states in a shared hash table attached to the CoglContext. The entire set of parameters for the sampler state is used as the key for the hash table. When a unique state is encountered the sampler cache will create a new entry, otherwise it will return a const pointer to an existing entry. That means we can have a single pointer to represent any combination of sampler state. Pipeline layers now just store this single pointer rather than storing all of the sampler state. The two separate state flags for wrap modes and filters have now been combined into one. It should be faster to compare the sampler state now because instead of comparing each value it can just compare the pointers to the cached sampler entries. The hash table of cached sampler states should only need to perform its more expensive hash on the state when a property is changed on a pipeline, not every time it is flushed. When the sampler objects extension is available each cached sampler state will also get a sampler object to represent it. The common code to flush the GL state will now simply bind this object to a unit instead of flushing the state though the CoglTexture when possible. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2012-04-04 21:20:04 +00:00
/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 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/>.
*
*
* Authors:
* Neil Roberts <neil@linux.intel.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cogl-sampler-cache-private.h"
#include "cogl-context-private.h"
Remove cogl-internal.h This remove cogl-internal.h in favour of using cogl-private.h. Some things in cogl-internal.h were moved to driver/gl/cogl-util-gl-private.h and the _cogl_gl_error_to_string function whose prototype was moved from cogl-internal.h to cogl-util-gl-private.h has had its implementation moved from cogl.c to cogl-util-gl.c Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 01cc82ece091aa3bec4c07fdd6bc9e5135fca573)
2013-01-20 18:47:40 +00:00
#include "cogl-util-gl-private.h"
Use GL_ARB_sampler_objects GL_ARB_sampler_objects provides a GL object which overrides the sampler state part of a texture object with different values. The sampler state that Cogl currently exposes is the wrap modes and filters. Cogl exposes the state as part of the pipeline layer state but without this extension GL only exposes it as part of the texture object state. This means that it won't work to use a single texture multiple times in one primitive with different sampler states. It also makes switching between different sampler states with a single texture not terribly efficient because it has to change the texture object state every time. This patch adds a cache for sampler states in a shared hash table attached to the CoglContext. The entire set of parameters for the sampler state is used as the key for the hash table. When a unique state is encountered the sampler cache will create a new entry, otherwise it will return a const pointer to an existing entry. That means we can have a single pointer to represent any combination of sampler state. Pipeline layers now just store this single pointer rather than storing all of the sampler state. The two separate state flags for wrap modes and filters have now been combined into one. It should be faster to compare the sampler state now because instead of comparing each value it can just compare the pointers to the cached sampler entries. The hash table of cached sampler states should only need to perform its more expensive hash on the state when a property is changed on a pipeline, not every time it is flushed. When the sampler objects extension is available each cached sampler state will also get a sampler object to represent it. The common code to flush the GL state will now simply bind this object to a unit instead of flushing the state though the CoglTexture when possible. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2012-04-04 21:20:04 +00:00
Fixes for building with --disable-gl This fixes a few problems that occur when only using a GLES2 header. • The use of GL_CLAMP_TO_BORDER and GL_MIRRORED_REPEAT were moved from cogl-pipelinelayer-state.h to cogl-sampler-cache-private.h but the corresponding defines were not. • cogl-sampler-cache.c was using GL_TEXTURE_WRAP_R but this is only defined as GL_TEXTURE_WRAP_R_OES from the GLES2 header so it needs a #define. • cogl-framebuffer-private.h uses GLuint but it does not include cogl-gl-header.h. It gets away with this when GLX support is enabled because the GL header would be included via glx.h. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 9cdb87c864fc262c4b26c13963670d60d7c18058)
2012-05-08 14:53:25 +00:00
#ifndef GL_TEXTURE_WRAP_R
#define GL_TEXTURE_WRAP_R 0x8072
#endif
Use GL_ARB_sampler_objects GL_ARB_sampler_objects provides a GL object which overrides the sampler state part of a texture object with different values. The sampler state that Cogl currently exposes is the wrap modes and filters. Cogl exposes the state as part of the pipeline layer state but without this extension GL only exposes it as part of the texture object state. This means that it won't work to use a single texture multiple times in one primitive with different sampler states. It also makes switching between different sampler states with a single texture not terribly efficient because it has to change the texture object state every time. This patch adds a cache for sampler states in a shared hash table attached to the CoglContext. The entire set of parameters for the sampler state is used as the key for the hash table. When a unique state is encountered the sampler cache will create a new entry, otherwise it will return a const pointer to an existing entry. That means we can have a single pointer to represent any combination of sampler state. Pipeline layers now just store this single pointer rather than storing all of the sampler state. The two separate state flags for wrap modes and filters have now been combined into one. It should be faster to compare the sampler state now because instead of comparing each value it can just compare the pointers to the cached sampler entries. The hash table of cached sampler states should only need to perform its more expensive hash on the state when a property is changed on a pipeline, not every time it is flushed. When the sampler objects extension is available each cached sampler state will also get a sampler object to represent it. The common code to flush the GL state will now simply bind this object to a unit instead of flushing the state though the CoglTexture when possible. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2012-04-04 21:20:04 +00:00
struct _CoglSamplerCache
{
CoglContext *context;
/* The samplers are hashed in two tables. One is using the enum
values that Cogl exposes (so it can include the 'automatic' wrap
mode) and the other is using the converted values that will be
given to GL. The first is used to get a unique pointer for the
sampler state so that pipelines only need to store a single
pointer instead of the whole state and the second is used so that
only a single GL sampler object will be created for each unique
GL state. */
GHashTable *hash_table_cogl;
GHashTable *hash_table_gl;
/* This is used for generated fake unique sampler object numbers
when the sampler object extension is not supported */
GLuint next_fake_sampler_object_number;
};
static CoglSamplerCacheWrapMode
get_real_wrap_mode (CoglSamplerCacheWrapMode wrap_mode)
{
if (wrap_mode == COGL_SAMPLER_CACHE_WRAP_MODE_AUTOMATIC)
return COGL_SAMPLER_CACHE_WRAP_MODE_CLAMP_TO_EDGE;
return wrap_mode;
}
static void
canonicalize_key (CoglSamplerCacheEntry *key)
{
/* This converts the wrap modes to the enums that will actually be
given to GL so that it can be used as a key to get a unique GL
sampler object for the state */
key->wrap_mode_s = get_real_wrap_mode (key->wrap_mode_s);
key->wrap_mode_t = get_real_wrap_mode (key->wrap_mode_t);
key->wrap_mode_p = get_real_wrap_mode (key->wrap_mode_p);
}
Switch use of primitive glib types to c99 equivalents The coding style has for a long time said to avoid using redundant glib data types such as gint or gchar etc because we feel that they make the code look unnecessarily foreign to developers coming from outside of the Gnome developer community. Note: When we tried to find the historical rationale for the types we just found that they were apparently only added for consistent syntax highlighting which didn't seem that compelling. Up until now we have been continuing to use some of the platform specific type such as gint{8,16,32,64} and gsize but this patch switches us over to using the standard c99 equivalents instead so we can further ensure that our code looks familiar to the widest range of C developers who might potentially contribute to Cogl. So instead of using the gint{8,16,32,64} and guint{8,16,32,64} types this switches all Cogl code to instead use the int{8,16,32,64}_t and uint{8,16,32,64}_t c99 types instead. Instead of gsize we now use size_t For now we are not going to use the c99 _Bool type and instead we have introduced a new CoglBool type to use instead of gboolean. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 5967dad2400d32ca6319cef6cb572e81bf2c15f0)
2012-04-16 20:56:40 +00:00
static CoglBool
Use GL_ARB_sampler_objects GL_ARB_sampler_objects provides a GL object which overrides the sampler state part of a texture object with different values. The sampler state that Cogl currently exposes is the wrap modes and filters. Cogl exposes the state as part of the pipeline layer state but without this extension GL only exposes it as part of the texture object state. This means that it won't work to use a single texture multiple times in one primitive with different sampler states. It also makes switching between different sampler states with a single texture not terribly efficient because it has to change the texture object state every time. This patch adds a cache for sampler states in a shared hash table attached to the CoglContext. The entire set of parameters for the sampler state is used as the key for the hash table. When a unique state is encountered the sampler cache will create a new entry, otherwise it will return a const pointer to an existing entry. That means we can have a single pointer to represent any combination of sampler state. Pipeline layers now just store this single pointer rather than storing all of the sampler state. The two separate state flags for wrap modes and filters have now been combined into one. It should be faster to compare the sampler state now because instead of comparing each value it can just compare the pointers to the cached sampler entries. The hash table of cached sampler states should only need to perform its more expensive hash on the state when a property is changed on a pipeline, not every time it is flushed. When the sampler objects extension is available each cached sampler state will also get a sampler object to represent it. The common code to flush the GL state will now simply bind this object to a unit instead of flushing the state though the CoglTexture when possible. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2012-04-04 21:20:04 +00:00
wrap_mode_equal_gl (CoglSamplerCacheWrapMode wrap_mode0,
CoglSamplerCacheWrapMode wrap_mode1)
{
/* We want to compare the actual GLenum that will be used so that if
two different wrap_modes actually use the same GL state we'll
still use the same sampler object */
return get_real_wrap_mode (wrap_mode0) == get_real_wrap_mode (wrap_mode1);
}
Switch use of primitive glib types to c99 equivalents The coding style has for a long time said to avoid using redundant glib data types such as gint or gchar etc because we feel that they make the code look unnecessarily foreign to developers coming from outside of the Gnome developer community. Note: When we tried to find the historical rationale for the types we just found that they were apparently only added for consistent syntax highlighting which didn't seem that compelling. Up until now we have been continuing to use some of the platform specific type such as gint{8,16,32,64} and gsize but this patch switches us over to using the standard c99 equivalents instead so we can further ensure that our code looks familiar to the widest range of C developers who might potentially contribute to Cogl. So instead of using the gint{8,16,32,64} and guint{8,16,32,64} types this switches all Cogl code to instead use the int{8,16,32,64}_t and uint{8,16,32,64}_t c99 types instead. Instead of gsize we now use size_t For now we are not going to use the c99 _Bool type and instead we have introduced a new CoglBool type to use instead of gboolean. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 5967dad2400d32ca6319cef6cb572e81bf2c15f0)
2012-04-16 20:56:40 +00:00
static CoglBool
Use GL_ARB_sampler_objects GL_ARB_sampler_objects provides a GL object which overrides the sampler state part of a texture object with different values. The sampler state that Cogl currently exposes is the wrap modes and filters. Cogl exposes the state as part of the pipeline layer state but without this extension GL only exposes it as part of the texture object state. This means that it won't work to use a single texture multiple times in one primitive with different sampler states. It also makes switching between different sampler states with a single texture not terribly efficient because it has to change the texture object state every time. This patch adds a cache for sampler states in a shared hash table attached to the CoglContext. The entire set of parameters for the sampler state is used as the key for the hash table. When a unique state is encountered the sampler cache will create a new entry, otherwise it will return a const pointer to an existing entry. That means we can have a single pointer to represent any combination of sampler state. Pipeline layers now just store this single pointer rather than storing all of the sampler state. The two separate state flags for wrap modes and filters have now been combined into one. It should be faster to compare the sampler state now because instead of comparing each value it can just compare the pointers to the cached sampler entries. The hash table of cached sampler states should only need to perform its more expensive hash on the state when a property is changed on a pipeline, not every time it is flushed. When the sampler objects extension is available each cached sampler state will also get a sampler object to represent it. The common code to flush the GL state will now simply bind this object to a unit instead of flushing the state though the CoglTexture when possible. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2012-04-04 21:20:04 +00:00
sampler_state_equal_gl (const void *value0,
const void *value1)
{
const CoglSamplerCacheEntry *state0 = value0;
const CoglSamplerCacheEntry *state1 = value1;
return (state0->mag_filter == state1->mag_filter &&
state0->min_filter == state1->min_filter &&
wrap_mode_equal_gl (state0->wrap_mode_s, state1->wrap_mode_s) &&
wrap_mode_equal_gl (state0->wrap_mode_t, state1->wrap_mode_t) &&
wrap_mode_equal_gl (state0->wrap_mode_p, state1->wrap_mode_p));
}
static unsigned int
hash_wrap_mode_gl (unsigned int hash,
CoglSamplerCacheWrapMode wrap_mode)
{
/* We want to hash the actual GLenum that will be used so that if
two different wrap_modes actually use the same GL state we'll
still use the same sampler object */
GLenum real_wrap_mode = get_real_wrap_mode (wrap_mode);
return _cogl_util_one_at_a_time_hash (hash,
&real_wrap_mode,
sizeof (real_wrap_mode));
}
static unsigned int
hash_sampler_state_gl (const void *key)
{
const CoglSamplerCacheEntry *entry = key;
unsigned int hash = 0;
hash = _cogl_util_one_at_a_time_hash (hash, &entry->mag_filter,
sizeof (entry->mag_filter));
hash = _cogl_util_one_at_a_time_hash (hash, &entry->min_filter,
sizeof (entry->min_filter));
hash = hash_wrap_mode_gl (hash, entry->wrap_mode_s);
hash = hash_wrap_mode_gl (hash, entry->wrap_mode_t);
hash = hash_wrap_mode_gl (hash, entry->wrap_mode_p);
return _cogl_util_one_at_a_time_mix (hash);
}
Switch use of primitive glib types to c99 equivalents The coding style has for a long time said to avoid using redundant glib data types such as gint or gchar etc because we feel that they make the code look unnecessarily foreign to developers coming from outside of the Gnome developer community. Note: When we tried to find the historical rationale for the types we just found that they were apparently only added for consistent syntax highlighting which didn't seem that compelling. Up until now we have been continuing to use some of the platform specific type such as gint{8,16,32,64} and gsize but this patch switches us over to using the standard c99 equivalents instead so we can further ensure that our code looks familiar to the widest range of C developers who might potentially contribute to Cogl. So instead of using the gint{8,16,32,64} and guint{8,16,32,64} types this switches all Cogl code to instead use the int{8,16,32,64}_t and uint{8,16,32,64}_t c99 types instead. Instead of gsize we now use size_t For now we are not going to use the c99 _Bool type and instead we have introduced a new CoglBool type to use instead of gboolean. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 5967dad2400d32ca6319cef6cb572e81bf2c15f0)
2012-04-16 20:56:40 +00:00
static CoglBool
Use GL_ARB_sampler_objects GL_ARB_sampler_objects provides a GL object which overrides the sampler state part of a texture object with different values. The sampler state that Cogl currently exposes is the wrap modes and filters. Cogl exposes the state as part of the pipeline layer state but without this extension GL only exposes it as part of the texture object state. This means that it won't work to use a single texture multiple times in one primitive with different sampler states. It also makes switching between different sampler states with a single texture not terribly efficient because it has to change the texture object state every time. This patch adds a cache for sampler states in a shared hash table attached to the CoglContext. The entire set of parameters for the sampler state is used as the key for the hash table. When a unique state is encountered the sampler cache will create a new entry, otherwise it will return a const pointer to an existing entry. That means we can have a single pointer to represent any combination of sampler state. Pipeline layers now just store this single pointer rather than storing all of the sampler state. The two separate state flags for wrap modes and filters have now been combined into one. It should be faster to compare the sampler state now because instead of comparing each value it can just compare the pointers to the cached sampler entries. The hash table of cached sampler states should only need to perform its more expensive hash on the state when a property is changed on a pipeline, not every time it is flushed. When the sampler objects extension is available each cached sampler state will also get a sampler object to represent it. The common code to flush the GL state will now simply bind this object to a unit instead of flushing the state though the CoglTexture when possible. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2012-04-04 21:20:04 +00:00
sampler_state_equal_cogl (const void *value0,
const void *value1)
{
const CoglSamplerCacheEntry *state0 = value0;
const CoglSamplerCacheEntry *state1 = value1;
return (state0->mag_filter == state1->mag_filter &&
state0->min_filter == state1->min_filter &&
state0->wrap_mode_s == state1->wrap_mode_s &&
state0->wrap_mode_t == state1->wrap_mode_t &&
state0->wrap_mode_p == state1->wrap_mode_p);
}
static unsigned int
hash_sampler_state_cogl (const void *key)
{
const CoglSamplerCacheEntry *entry = key;
unsigned int hash = 0;
hash = _cogl_util_one_at_a_time_hash (hash, &entry->mag_filter,
sizeof (entry->mag_filter));
hash = _cogl_util_one_at_a_time_hash (hash, &entry->min_filter,
sizeof (entry->min_filter));
hash = _cogl_util_one_at_a_time_hash (hash, &entry->wrap_mode_s,
sizeof (entry->wrap_mode_s));
hash = _cogl_util_one_at_a_time_hash (hash, &entry->wrap_mode_t,
sizeof (entry->wrap_mode_t));
hash = _cogl_util_one_at_a_time_hash (hash, &entry->wrap_mode_p,
sizeof (entry->wrap_mode_p));
return _cogl_util_one_at_a_time_mix (hash);
}
CoglSamplerCache *
_cogl_sampler_cache_new (CoglContext *context)
{
CoglSamplerCache *cache = g_new (CoglSamplerCache, 1);
/* No reference is taken on the context because it would create a
circular reference */
cache->context = context;
cache->hash_table_gl = g_hash_table_new (hash_sampler_state_gl,
sampler_state_equal_gl);
cache->hash_table_cogl = g_hash_table_new (hash_sampler_state_cogl,
sampler_state_equal_cogl);
cache->next_fake_sampler_object_number = 1;
return cache;
}
static void
set_wrap_mode (CoglContext *context,
GLuint sampler_object,
GLenum param,
CoglSamplerCacheWrapMode wrap_mode)
{
GE( context, glSamplerParameteri (sampler_object,
param,
wrap_mode) );
}
static CoglSamplerCacheEntry *
_cogl_sampler_cache_get_entry_gl (CoglSamplerCache *cache,
const CoglSamplerCacheEntry *key)
{
CoglSamplerCacheEntry *entry;
entry = g_hash_table_lookup (cache->hash_table_gl, key);
if (entry == NULL)
{
CoglContext *context = cache->context;
entry = g_slice_dup (CoglSamplerCacheEntry, key);
Use COGL_FLAGS_* for the context's private feature flags 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
2013-11-25 16:11:36 +00:00
if (_cogl_has_private_feature (context,
COGL_PRIVATE_FEATURE_SAMPLER_OBJECTS))
Use GL_ARB_sampler_objects GL_ARB_sampler_objects provides a GL object which overrides the sampler state part of a texture object with different values. The sampler state that Cogl currently exposes is the wrap modes and filters. Cogl exposes the state as part of the pipeline layer state but without this extension GL only exposes it as part of the texture object state. This means that it won't work to use a single texture multiple times in one primitive with different sampler states. It also makes switching between different sampler states with a single texture not terribly efficient because it has to change the texture object state every time. This patch adds a cache for sampler states in a shared hash table attached to the CoglContext. The entire set of parameters for the sampler state is used as the key for the hash table. When a unique state is encountered the sampler cache will create a new entry, otherwise it will return a const pointer to an existing entry. That means we can have a single pointer to represent any combination of sampler state. Pipeline layers now just store this single pointer rather than storing all of the sampler state. The two separate state flags for wrap modes and filters have now been combined into one. It should be faster to compare the sampler state now because instead of comparing each value it can just compare the pointers to the cached sampler entries. The hash table of cached sampler states should only need to perform its more expensive hash on the state when a property is changed on a pipeline, not every time it is flushed. When the sampler objects extension is available each cached sampler state will also get a sampler object to represent it. The common code to flush the GL state will now simply bind this object to a unit instead of flushing the state though the CoglTexture when possible. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2012-04-04 21:20:04 +00:00
{
GE( context, glGenSamplers (1, &entry->sampler_object) );
GE( context, glSamplerParameteri (entry->sampler_object,
GL_TEXTURE_MIN_FILTER,
entry->min_filter) );
GE( context, glSamplerParameteri (entry->sampler_object,
GL_TEXTURE_MAG_FILTER,
entry->mag_filter) );
set_wrap_mode (context,
entry->sampler_object,
GL_TEXTURE_WRAP_S,
entry->wrap_mode_s);
set_wrap_mode (context,
entry->sampler_object,
GL_TEXTURE_WRAP_T,
entry->wrap_mode_t);
set_wrap_mode (context,
entry->sampler_object,
GL_TEXTURE_WRAP_R,
entry->wrap_mode_p);
}
else
{
/* If sampler objects aren't supported then we'll invent a
unique number so that pipelines can still compare the
unique state just by comparing the sampler object
numbers */
entry->sampler_object = cache->next_fake_sampler_object_number++;
}
g_hash_table_insert (cache->hash_table_gl, entry, entry);
}
return entry;
}
static CoglSamplerCacheEntry *
_cogl_sampler_cache_get_entry_cogl (CoglSamplerCache *cache,
const CoglSamplerCacheEntry *key)
{
CoglSamplerCacheEntry *entry;
entry = g_hash_table_lookup (cache->hash_table_cogl, key);
if (entry == NULL)
{
CoglSamplerCacheEntry canonical_key;
CoglSamplerCacheEntry *gl_entry;
entry = g_slice_dup (CoglSamplerCacheEntry, key);
/* Get the sampler object number from the canonical GL version
of the sampler state cache */
canonical_key = *key;
canonicalize_key (&canonical_key);
gl_entry = _cogl_sampler_cache_get_entry_gl (cache, &canonical_key);
entry->sampler_object = gl_entry->sampler_object;
g_hash_table_insert (cache->hash_table_cogl, entry, entry);
}
return entry;
}
const CoglSamplerCacheEntry *
_cogl_sampler_cache_get_default_entry (CoglSamplerCache *cache)
{
CoglSamplerCacheEntry key;
key.wrap_mode_s = COGL_SAMPLER_CACHE_WRAP_MODE_AUTOMATIC;
key.wrap_mode_t = COGL_SAMPLER_CACHE_WRAP_MODE_AUTOMATIC;
key.wrap_mode_p = COGL_SAMPLER_CACHE_WRAP_MODE_AUTOMATIC;
key.min_filter = GL_LINEAR;
key.mag_filter = GL_LINEAR;
return _cogl_sampler_cache_get_entry_cogl (cache, &key);
}
const CoglSamplerCacheEntry *
_cogl_sampler_cache_update_wrap_modes (CoglSamplerCache *cache,
const CoglSamplerCacheEntry *old_entry,
CoglSamplerCacheWrapMode wrap_mode_s,
CoglSamplerCacheWrapMode wrap_mode_t,
CoglSamplerCacheWrapMode wrap_mode_p)
{
CoglSamplerCacheEntry key = *old_entry;
key.wrap_mode_s = wrap_mode_s;
key.wrap_mode_t = wrap_mode_t;
key.wrap_mode_p = wrap_mode_p;
return _cogl_sampler_cache_get_entry_cogl (cache, &key);
}
const CoglSamplerCacheEntry *
_cogl_sampler_cache_update_filters (CoglSamplerCache *cache,
const CoglSamplerCacheEntry *old_entry,
GLenum min_filter,
GLenum mag_filter)
{
CoglSamplerCacheEntry key = *old_entry;
key.min_filter = min_filter;
key.mag_filter = mag_filter;
return _cogl_sampler_cache_get_entry_cogl (cache, &key);
}
static void
hash_table_free_gl_cb (void *key,
void *value,
void *user_data)
{
CoglContext *context = user_data;
CoglSamplerCacheEntry *entry = value;
Use COGL_FLAGS_* for the context's private feature flags 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
2013-11-25 16:11:36 +00:00
if (_cogl_has_private_feature (context,
COGL_PRIVATE_FEATURE_SAMPLER_OBJECTS))
Use GL_ARB_sampler_objects GL_ARB_sampler_objects provides a GL object which overrides the sampler state part of a texture object with different values. The sampler state that Cogl currently exposes is the wrap modes and filters. Cogl exposes the state as part of the pipeline layer state but without this extension GL only exposes it as part of the texture object state. This means that it won't work to use a single texture multiple times in one primitive with different sampler states. It also makes switching between different sampler states with a single texture not terribly efficient because it has to change the texture object state every time. This patch adds a cache for sampler states in a shared hash table attached to the CoglContext. The entire set of parameters for the sampler state is used as the key for the hash table. When a unique state is encountered the sampler cache will create a new entry, otherwise it will return a const pointer to an existing entry. That means we can have a single pointer to represent any combination of sampler state. Pipeline layers now just store this single pointer rather than storing all of the sampler state. The two separate state flags for wrap modes and filters have now been combined into one. It should be faster to compare the sampler state now because instead of comparing each value it can just compare the pointers to the cached sampler entries. The hash table of cached sampler states should only need to perform its more expensive hash on the state when a property is changed on a pipeline, not every time it is flushed. When the sampler objects extension is available each cached sampler state will also get a sampler object to represent it. The common code to flush the GL state will now simply bind this object to a unit instead of flushing the state though the CoglTexture when possible. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2012-04-04 21:20:04 +00:00
GE( context, glDeleteSamplers (1, &entry->sampler_object) );
g_slice_free (CoglSamplerCacheEntry, entry);
}
static void
hash_table_free_cogl_cb (void *key,
void *value,
void *user_data)
{
CoglSamplerCacheEntry *entry = value;
g_slice_free (CoglSamplerCacheEntry, entry);
}
void
_cogl_sampler_cache_free (CoglSamplerCache *cache)
{
g_hash_table_foreach (cache->hash_table_gl,
hash_table_free_gl_cb,
cache->context);
g_hash_table_destroy (cache->hash_table_gl);
g_hash_table_foreach (cache->hash_table_cogl,
hash_table_free_cogl_cb,
cache->context);
g_hash_table_destroy (cache->hash_table_cogl);
g_free (cache);
}
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