[cogl/wip/rib/cogl-1.12: 21/142] Use GL_ARB_sampler_objects
- From: Robert Bragg <rbragg src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [cogl/wip/rib/cogl-1.12: 21/142] Use GL_ARB_sampler_objects
- Date: Wed, 1 Aug 2012 07:04:00 +0000 (UTC)
commit 3603d79628d06598c1ab9dd6bb5a3f2302c4cbfc
Author: Neil Roberts <neil linux intel com>
Date: Wed Apr 4 22:20:04 2012 +0100
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>
(cherry picked from commit c33ce5fc6bbda0f7c2d8f0e4bb3523948acce0da)
cogl/Makefile.am | 2 +
cogl/cogl-context-private.h | 3 +
cogl/cogl-context.c | 3 +
cogl/cogl-internal.h | 3 +-
cogl/cogl-pipeline-layer-private.h | 45 +---
cogl/cogl-pipeline-layer-state-private.h | 13 +-
cogl/cogl-pipeline-layer-state.c | 331 +++++++++++++---------------
cogl/cogl-pipeline-layer.c | 30 +--
cogl/cogl-pipeline-opengl.c | 27 ++-
cogl/cogl-pipeline.c | 8 +-
cogl/cogl-sampler-cache-private.h | 82 +++++++
cogl/cogl-sampler-cache.c | 360 ++++++++++++++++++++++++++++++
cogl/cogl-util.h | 4 +-
cogl/driver/gl/cogl-gl.c | 3 +
cogl/gl-prototypes/cogl-all-functions.h | 19 ++
15 files changed, 669 insertions(+), 264 deletions(-)
---
diff --git a/cogl/Makefile.am b/cogl/Makefile.am
index 21d6676..8b11e76 100644
--- a/cogl/Makefile.am
+++ b/cogl/Makefile.am
@@ -288,6 +288,8 @@ cogl_sources_c = \
$(srcdir)/cogl-material-compat.c \
$(srcdir)/cogl-program.c \
$(srcdir)/cogl-program-private.h \
+ $(srcdir)/cogl-sampler-cache.c \
+ $(srcdir)/cogl-sampler-cache-private.h \
$(srcdir)/cogl-blend-string.c \
$(srcdir)/cogl-blend-string.h \
$(srcdir)/cogl-debug.c \
diff --git a/cogl/cogl-context-private.h b/cogl/cogl-context-private.h
index a79672f..ccc5b6d 100644
--- a/cogl/cogl-context-private.h
+++ b/cogl/cogl-context-private.h
@@ -47,6 +47,7 @@
#include "cogl-texture-2d.h"
#include "cogl-texture-3d.h"
#include "cogl-texture-rectangle.h"
+#include "cogl-sampler-cache-private.h"
typedef struct
{
@@ -252,6 +253,8 @@ struct _CoglContext
CoglWinsysRectangleState rectangle_state;
+ CoglSamplerCache *sampler_cache;
+
/* FIXME: remove these when we remove the last xlib based clutter
* backend. they should be tracked as part of the renderer but e.g.
* the eglx backend doesn't yet have a corresponding Cogl winsys
diff --git a/cogl/cogl-context.c b/cogl/cogl-context.c
index 40d6de0..930f4b8 100644
--- a/cogl/cogl-context.c
+++ b/cogl/cogl-context.c
@@ -252,6 +252,8 @@ cogl_context_new (CoglDisplay *display,
/* Initialise the driver specific state */
_cogl_init_feature_overrides (context);
+ _context->sampler_cache = _cogl_sampler_cache_new (_context);
+
_cogl_pipeline_init_default_pipeline ();
_cogl_pipeline_init_default_layers ();
_cogl_pipeline_init_state_hash_functions ();
@@ -522,6 +524,7 @@ _cogl_context_free (CoglContext *context)
cogl_pipeline_cache_free (context->pipeline_cache);
+ _cogl_sampler_cache_free (context->sampler_cache);
_cogl_destroy_texture_units ();
diff --git a/cogl/cogl-internal.h b/cogl/cogl-internal.h
index 284fc97..89d7258 100644
--- a/cogl/cogl-internal.h
+++ b/cogl/cogl-internal.h
@@ -102,7 +102,8 @@ typedef enum
COGL_PRIVATE_FEATURE_EXT_PACKED_DEPTH_STENCIL = 1L<<7,
COGL_PRIVATE_FEATURE_OES_PACKED_DEPTH_STENCIL = 1L<<8,
COGL_PRIVATE_FEATURE_TEXTURE_FORMAT_BGRA8888 = 1L<<9,
- COGL_PRIVATE_FEATURE_UNPACK_SUBIMAGE = 1L<<10
+ COGL_PRIVATE_FEATURE_UNPACK_SUBIMAGE = 1L<<10,
+ COGL_PRIVATE_FEATURE_SAMPLER_OBJECTS = 1L<<11
} CoglPrivateFeatureFlags;
/* Sometimes when evaluating pipelines, either during comparisons or
diff --git a/cogl/cogl-pipeline-layer-private.h b/cogl/cogl-pipeline-layer-private.h
index 4446224..6925b40 100644
--- a/cogl/cogl-pipeline-layer-private.h
+++ b/cogl/cogl-pipeline-layer-private.h
@@ -35,6 +35,7 @@
#include "cogl-pipeline-layer-state.h"
#include "cogl-internal.h"
#include "cogl-pipeline-snippet-private.h"
+#include "cogl-sampler-cache-private.h"
#include <glib.h>
@@ -49,21 +50,6 @@
typedef struct _CoglPipelineLayer CoglPipelineLayer;
#define COGL_PIPELINE_LAYER(OBJECT) ((CoglPipelineLayer *)OBJECT)
-/* GL_ALWAYS is just used here as a value that is known not to clash
- * with any valid GL wrap modes.
- *
- * XXX: keep the values in sync with the CoglPipelineWrapMode enum
- * so no conversion is actually needed.
- */
-typedef enum _CoglPipelineWrapModeInternal
-{
- COGL_PIPELINE_WRAP_MODE_INTERNAL_REPEAT = GL_REPEAT,
- COGL_PIPELINE_WRAP_MODE_INTERNAL_MIRRORED_REPEAT = GL_MIRRORED_REPEAT,
- COGL_PIPELINE_WRAP_MODE_INTERNAL_CLAMP_TO_EDGE = GL_CLAMP_TO_EDGE,
- COGL_PIPELINE_WRAP_MODE_INTERNAL_CLAMP_TO_BORDER = GL_CLAMP_TO_BORDER,
- COGL_PIPELINE_WRAP_MODE_INTERNAL_AUTOMATIC = GL_ALWAYS
-} CoglPipelineWrapModeInternal;
-
/* XXX: should I rename these as
* COGL_PIPELINE_LAYER_STATE_INDEX_XYZ... ?
*/
@@ -73,8 +59,7 @@ typedef enum
COGL_PIPELINE_LAYER_STATE_UNIT_INDEX,
COGL_PIPELINE_LAYER_STATE_TEXTURE_TYPE_INDEX,
COGL_PIPELINE_LAYER_STATE_TEXTURE_DATA_INDEX,
- COGL_PIPELINE_LAYER_STATE_FILTERS_INDEX,
- COGL_PIPELINE_LAYER_STATE_WRAP_MODES_INDEX,
+ COGL_PIPELINE_LAYER_STATE_SAMPLER_INDEX,
COGL_PIPELINE_LAYER_STATE_COMBINE_INDEX,
COGL_PIPELINE_LAYER_STATE_COMBINE_CONSTANT_INDEX,
COGL_PIPELINE_LAYER_STATE_USER_MATRIX_INDEX,
@@ -103,10 +88,8 @@ typedef enum
1L<<COGL_PIPELINE_LAYER_STATE_TEXTURE_TYPE_INDEX,
COGL_PIPELINE_LAYER_STATE_TEXTURE_DATA =
1L<<COGL_PIPELINE_LAYER_STATE_TEXTURE_DATA_INDEX,
- COGL_PIPELINE_LAYER_STATE_FILTERS =
- 1L<<COGL_PIPELINE_LAYER_STATE_FILTERS_INDEX,
- COGL_PIPELINE_LAYER_STATE_WRAP_MODES =
- 1L<<COGL_PIPELINE_LAYER_STATE_WRAP_MODES_INDEX,
+ COGL_PIPELINE_LAYER_STATE_SAMPLER =
+ 1L<<COGL_PIPELINE_LAYER_STATE_SAMPLER_INDEX,
COGL_PIPELINE_LAYER_STATE_COMBINE =
1L<<COGL_PIPELINE_LAYER_STATE_COMBINE_INDEX,
@@ -146,9 +129,7 @@ typedef enum
COGL_PIPELINE_LAYER_STATE_FRAGMENT_SNIPPETS)
#define COGL_PIPELINE_LAYER_STATE_MULTI_PROPERTY \
- (COGL_PIPELINE_LAYER_STATE_FILTERS | \
- COGL_PIPELINE_LAYER_STATE_WRAP_MODES | \
- COGL_PIPELINE_LAYER_STATE_COMBINE | \
+ (COGL_PIPELINE_LAYER_STATE_COMBINE | \
COGL_PIPELINE_LAYER_STATE_VERTEX_SNIPPETS | \
COGL_PIPELINE_LAYER_STATE_FRAGMENT_SNIPPETS)
@@ -267,12 +248,7 @@ struct _CoglPipelineLayer
backends. */
CoglTextureType texture_type;
- CoglPipelineFilter mag_filter;
- CoglPipelineFilter min_filter;
-
- CoglPipelineWrapModeInternal wrap_mode_s;
- CoglPipelineWrapModeInternal wrap_mode_t;
- CoglPipelineWrapModeInternal wrap_mode_p;
+ const CoglSamplerCacheEntry *sampler_cache_entry;
/* Infrequent differences aren't currently tracked in
* a separate, dynamically allocated structure as they are
@@ -341,15 +317,18 @@ _cogl_pipeline_layer_pre_paint (CoglPipelineLayer *layerr);
void
_cogl_pipeline_layer_get_wrap_modes (CoglPipelineLayer *layer,
- CoglPipelineWrapModeInternal *wrap_mode_s,
- CoglPipelineWrapModeInternal *wrap_mode_t,
- CoglPipelineWrapModeInternal *wrap_mode_r);
+ CoglSamplerCacheWrapMode *wrap_mode_s,
+ CoglSamplerCacheWrapMode *wrap_mode_t,
+ CoglSamplerCacheWrapMode *wrap_mode_r);
void
_cogl_pipeline_layer_get_filters (CoglPipelineLayer *layer,
CoglPipelineFilter *min_filter,
CoglPipelineFilter *mag_filter);
+const CoglSamplerCacheEntry *
+_cogl_pipeline_layer_get_sampler_state (CoglPipelineLayer *layer);
+
void
_cogl_pipeline_get_layer_filters (CoglPipeline *pipeline,
int layer_index,
diff --git a/cogl/cogl-pipeline-layer-state-private.h b/cogl/cogl-pipeline-layer-state-private.h
index 992e889..32fced8 100644
--- a/cogl/cogl-pipeline-layer-state-private.h
+++ b/cogl/cogl-pipeline-layer-state-private.h
@@ -63,14 +63,10 @@ _cogl_pipeline_layer_combine_constant_equal (CoglPipelineLayer *authority0,
CoglPipelineLayer *authority1);
gboolean
-_cogl_pipeline_layer_filters_equal (CoglPipelineLayer *authority0,
+_cogl_pipeline_layer_sampler_equal (CoglPipelineLayer *authority0,
CoglPipelineLayer *authority1);
gboolean
-_cogl_pipeline_layer_wrap_modes_equal (CoglPipelineLayer *authority0,
- CoglPipelineLayer *authority1);
-
-gboolean
_cogl_pipeline_layer_user_matrix_equal (CoglPipelineLayer *authority0,
CoglPipelineLayer *authority1);
@@ -102,16 +98,11 @@ _cogl_pipeline_layer_hash_texture_data_state (CoglPipelineLayer *authority,
CoglPipelineHashState *state);
void
-_cogl_pipeline_layer_hash_filters_state (CoglPipelineLayer *authority,
+_cogl_pipeline_layer_hash_sampler_state (CoglPipelineLayer *authority,
CoglPipelineLayer **authorities,
CoglPipelineHashState *state);
void
-_cogl_pipeline_layer_hash_wrap_modes_state (CoglPipelineLayer *authority,
- CoglPipelineLayer **authorities,
- CoglPipelineHashState *state);
-
-void
_cogl_pipeline_layer_hash_combine_state (CoglPipelineLayer *authority,
CoglPipelineLayer **authorities,
CoglPipelineHashState *state);
diff --git a/cogl/cogl-pipeline-layer-state.c b/cogl/cogl-pipeline-layer-state.c
index 785d1e4..60cf006 100644
--- a/cogl/cogl-pipeline-layer-state.c
+++ b/cogl/cogl-pipeline-layer-state.c
@@ -363,19 +363,15 @@ cogl_pipeline_set_layer_null_texture (CoglPipeline *pipeline,
}
static void
-_cogl_pipeline_set_layer_wrap_modes (CoglPipeline *pipeline,
- CoglPipelineLayer *layer,
- CoglPipelineLayer *authority,
- CoglPipelineWrapModeInternal wrap_mode_s,
- CoglPipelineWrapModeInternal wrap_mode_t,
- CoglPipelineWrapModeInternal wrap_mode_p)
+_cogl_pipeline_set_layer_sampler_state (CoglPipeline *pipeline,
+ CoglPipelineLayer *layer,
+ CoglPipelineLayer *authority,
+ const CoglSamplerCacheEntry *state)
{
- CoglPipelineLayer *new;
- CoglPipelineLayerState change = COGL_PIPELINE_LAYER_STATE_WRAP_MODES;
+ CoglPipelineLayer *new;
+ CoglPipelineLayerState change = COGL_PIPELINE_LAYER_STATE_SAMPLER;
- if (authority->wrap_mode_s == wrap_mode_s &&
- authority->wrap_mode_t == wrap_mode_t &&
- authority->wrap_mode_p == wrap_mode_p)
+ if (authority->sampler_cache_entry == state)
return;
new = _cogl_pipeline_layer_pre_change_notify (pipeline, layer, change);
@@ -394,9 +390,7 @@ _cogl_pipeline_set_layer_wrap_modes (CoglPipeline *pipeline,
CoglPipelineLayer *old_authority =
_cogl_pipeline_layer_get_authority (parent, change);
- if (old_authority->wrap_mode_s == wrap_mode_s &&
- old_authority->wrap_mode_t == wrap_mode_t &&
- old_authority->wrap_mode_p == wrap_mode_p)
+ if (old_authority->sampler_cache_entry == state)
{
layer->differences &= ~change;
@@ -409,9 +403,7 @@ _cogl_pipeline_set_layer_wrap_modes (CoglPipeline *pipeline,
}
}
- layer->wrap_mode_s = wrap_mode_s;
- layer->wrap_mode_t = wrap_mode_t;
- layer->wrap_mode_p = wrap_mode_p;
+ layer->sampler_cache_entry = state;
/* If we weren't previously the authority on this state then we need
* to extended our differences mask and so it's possible that some
@@ -424,17 +416,17 @@ _cogl_pipeline_set_layer_wrap_modes (CoglPipeline *pipeline,
}
}
-static CoglPipelineWrapModeInternal
+static CoglSamplerCacheWrapMode
public_to_internal_wrap_mode (CoglPipelineWrapMode mode)
{
- return (CoglPipelineWrapModeInternal)mode;
+ return (CoglSamplerCacheWrapMode)mode;
}
static CoglPipelineWrapMode
-internal_to_public_wrap_mode (CoglPipelineWrapModeInternal internal_mode)
+internal_to_public_wrap_mode (CoglSamplerCacheWrapMode internal_mode)
{
_COGL_RETURN_VAL_IF_FAIL (internal_mode !=
- COGL_PIPELINE_WRAP_MODE_INTERNAL_CLAMP_TO_BORDER,
+ COGL_SAMPLER_CACHE_WRAP_MODE_CLAMP_TO_BORDER,
COGL_PIPELINE_WRAP_MODE_AUTOMATIC);
return (CoglPipelineWrapMode)internal_mode;
}
@@ -444,11 +436,14 @@ cogl_pipeline_set_layer_wrap_mode_s (CoglPipeline *pipeline,
int layer_index,
CoglPipelineWrapMode mode)
{
- CoglPipelineLayerState change = COGL_PIPELINE_LAYER_STATE_WRAP_MODES;
+ CoglPipelineLayerState change = COGL_PIPELINE_LAYER_STATE_SAMPLER;
CoglPipelineLayer *layer;
CoglPipelineLayer *authority;
- CoglPipelineWrapModeInternal internal_mode =
+ CoglSamplerCacheWrapMode internal_mode =
public_to_internal_wrap_mode (mode);
+ const CoglSamplerCacheEntry *sampler_state;
+
+ _COGL_GET_CONTEXT (ctx, NO_RETVAL);
_COGL_RETURN_IF_FAIL (cogl_is_pipeline (pipeline));
@@ -464,22 +459,33 @@ cogl_pipeline_set_layer_wrap_mode_s (CoglPipeline *pipeline,
* state we want to change */
authority = _cogl_pipeline_layer_get_authority (layer, change);
- _cogl_pipeline_set_layer_wrap_modes (pipeline, layer, authority,
- internal_mode,
- authority->wrap_mode_t,
- authority->wrap_mode_p);
+ sampler_state =
+ _cogl_sampler_cache_update_wrap_modes (ctx->sampler_cache,
+ authority->sampler_cache_entry,
+ internal_mode,
+ authority->sampler_cache_entry->
+ wrap_mode_t,
+ authority->sampler_cache_entry->
+ wrap_mode_p);
+ _cogl_pipeline_set_layer_sampler_state (pipeline,
+ layer,
+ authority,
+ sampler_state);
}
void
-cogl_pipeline_set_layer_wrap_mode_t (CoglPipeline *pipeline,
- int layer_index,
+cogl_pipeline_set_layer_wrap_mode_t (CoglPipeline *pipeline,
+ int layer_index,
CoglPipelineWrapMode mode)
{
- CoglPipelineLayerState change = COGL_PIPELINE_LAYER_STATE_WRAP_MODES;
+ CoglPipelineLayerState change = COGL_PIPELINE_LAYER_STATE_SAMPLER;
CoglPipelineLayer *layer;
CoglPipelineLayer *authority;
- CoglPipelineWrapModeInternal internal_mode =
+ CoglSamplerCacheWrapMode internal_mode =
public_to_internal_wrap_mode (mode);
+ const CoglSamplerCacheEntry *sampler_state;
+
+ _COGL_GET_CONTEXT (ctx, NO_RETVAL);
_COGL_RETURN_IF_FAIL (cogl_is_pipeline (pipeline));
@@ -495,10 +501,18 @@ cogl_pipeline_set_layer_wrap_mode_t (CoglPipeline *pipeline,
* state we want to change */
authority = _cogl_pipeline_layer_get_authority (layer, change);
- _cogl_pipeline_set_layer_wrap_modes (pipeline, layer, authority,
- authority->wrap_mode_s,
- internal_mode,
- authority->wrap_mode_p);
+ sampler_state =
+ _cogl_sampler_cache_update_wrap_modes (ctx->sampler_cache,
+ authority->sampler_cache_entry,
+ authority->sampler_cache_entry->
+ wrap_mode_s,
+ internal_mode,
+ authority->sampler_cache_entry->
+ wrap_mode_p);
+ _cogl_pipeline_set_layer_sampler_state (pipeline,
+ layer,
+ authority,
+ sampler_state);
}
/* The rationale for naming the third texture coordinate 'p' instead
@@ -514,15 +528,18 @@ cogl_pipeline_set_layer_wrap_mode_t (CoglPipeline *pipeline,
the w component conflicts with the w component of a position
vertex. */
void
-cogl_pipeline_set_layer_wrap_mode_p (CoglPipeline *pipeline,
- int layer_index,
+cogl_pipeline_set_layer_wrap_mode_p (CoglPipeline *pipeline,
+ int layer_index,
CoglPipelineWrapMode mode)
{
- CoglPipelineLayerState change = COGL_PIPELINE_LAYER_STATE_WRAP_MODES;
+ CoglPipelineLayerState change = COGL_PIPELINE_LAYER_STATE_SAMPLER;
CoglPipelineLayer *layer;
CoglPipelineLayer *authority;
- CoglPipelineWrapModeInternal internal_mode =
+ CoglSamplerCacheWrapMode internal_mode =
public_to_internal_wrap_mode (mode);
+ const CoglSamplerCacheEntry *sampler_state;
+
+ _COGL_GET_CONTEXT (ctx, NO_RETVAL);
_COGL_RETURN_IF_FAIL (cogl_is_pipeline (pipeline));
@@ -538,22 +555,33 @@ cogl_pipeline_set_layer_wrap_mode_p (CoglPipeline *pipeline,
* state we want to change */
authority = _cogl_pipeline_layer_get_authority (layer, change);
- _cogl_pipeline_set_layer_wrap_modes (pipeline, layer, authority,
- authority->wrap_mode_s,
- authority->wrap_mode_t,
- internal_mode);
+ sampler_state =
+ _cogl_sampler_cache_update_wrap_modes (ctx->sampler_cache,
+ authority->sampler_cache_entry,
+ authority->sampler_cache_entry->
+ wrap_mode_s,
+ authority->sampler_cache_entry->
+ wrap_mode_t,
+ internal_mode);
+ _cogl_pipeline_set_layer_sampler_state (pipeline,
+ layer,
+ authority,
+ sampler_state);
}
void
-cogl_pipeline_set_layer_wrap_mode (CoglPipeline *pipeline,
- int layer_index,
+cogl_pipeline_set_layer_wrap_mode (CoglPipeline *pipeline,
+ int layer_index,
CoglPipelineWrapMode mode)
{
- CoglPipelineLayerState change = COGL_PIPELINE_LAYER_STATE_WRAP_MODES;
+ CoglPipelineLayerState change = COGL_PIPELINE_LAYER_STATE_SAMPLER;
CoglPipelineLayer *layer;
CoglPipelineLayer *authority;
- CoglPipelineWrapModeInternal internal_mode =
+ CoglSamplerCacheWrapMode internal_mode =
public_to_internal_wrap_mode (mode);
+ const CoglSamplerCacheEntry *sampler_state;
+
+ _COGL_GET_CONTEXT (ctx, NO_RETVAL);
_COGL_RETURN_IF_FAIL (cogl_is_pipeline (pipeline));
@@ -569,20 +597,27 @@ cogl_pipeline_set_layer_wrap_mode (CoglPipeline *pipeline,
* state we want to change */
authority = _cogl_pipeline_layer_get_authority (layer, change);
- _cogl_pipeline_set_layer_wrap_modes (pipeline, layer, authority,
- internal_mode,
- internal_mode,
- internal_mode);
+ sampler_state =
+ _cogl_sampler_cache_update_wrap_modes (ctx->sampler_cache,
+ authority->sampler_cache_entry,
+ internal_mode,
+ internal_mode,
+ internal_mode);
+ _cogl_pipeline_set_layer_sampler_state (pipeline,
+ layer,
+ authority,
+ sampler_state);
/* XXX: I wonder if we should really be duplicating the mode into
- * the 'r' wrap mode too? */
+ * the 'p' wrap mode too? */
}
/* FIXME: deprecate this API */
CoglPipelineWrapMode
_cogl_pipeline_layer_get_wrap_mode_s (CoglPipelineLayer *layer)
{
- CoglPipelineLayerState change = COGL_PIPELINE_LAYER_STATE_WRAP_MODES;
+ CoglPipelineLayerState change = COGL_PIPELINE_LAYER_STATE_SAMPLER;
CoglPipelineLayer *authority;
+ const CoglSamplerCacheEntry *sampler_state;
_COGL_RETURN_VAL_IF_FAIL (_cogl_is_pipeline_layer (layer), FALSE);
@@ -590,7 +625,8 @@ _cogl_pipeline_layer_get_wrap_mode_s (CoglPipelineLayer *layer)
* state we want to change */
authority = _cogl_pipeline_layer_get_authority (layer, change);
- return internal_to_public_wrap_mode (authority->wrap_mode_s);
+ sampler_state = authority->sampler_cache_entry;
+ return internal_to_public_wrap_mode (sampler_state->wrap_mode_s);
}
CoglPipelineWrapMode
@@ -616,8 +652,9 @@ cogl_pipeline_get_layer_wrap_mode_s (CoglPipeline *pipeline, int layer_index)
CoglPipelineWrapMode
_cogl_pipeline_layer_get_wrap_mode_t (CoglPipelineLayer *layer)
{
- CoglPipelineLayerState change = COGL_PIPELINE_LAYER_STATE_WRAP_MODES;
+ CoglPipelineLayerState change = COGL_PIPELINE_LAYER_STATE_SAMPLER;
CoglPipelineLayer *authority;
+ const CoglSamplerCacheEntry *sampler_state;
_COGL_RETURN_VAL_IF_FAIL (_cogl_is_pipeline_layer (layer), FALSE);
@@ -625,7 +662,8 @@ _cogl_pipeline_layer_get_wrap_mode_t (CoglPipelineLayer *layer)
* state we want to change */
authority = _cogl_pipeline_layer_get_authority (layer, change);
- return internal_to_public_wrap_mode (authority->wrap_mode_t);
+ sampler_state = authority->sampler_cache_entry;
+ return internal_to_public_wrap_mode (sampler_state->wrap_mode_t);
}
CoglPipelineWrapMode
@@ -650,11 +688,13 @@ cogl_pipeline_get_layer_wrap_mode_t (CoglPipeline *pipeline, int layer_index)
CoglPipelineWrapMode
_cogl_pipeline_layer_get_wrap_mode_p (CoglPipelineLayer *layer)
{
- CoglPipelineLayerState change = COGL_PIPELINE_LAYER_STATE_WRAP_MODES;
+ CoglPipelineLayerState change = COGL_PIPELINE_LAYER_STATE_SAMPLER;
CoglPipelineLayer *authority =
_cogl_pipeline_layer_get_authority (layer, change);
+ const CoglSamplerCacheEntry *sampler_state;
- return internal_to_public_wrap_mode (authority->wrap_mode_p);
+ sampler_state = authority->sampler_cache_entry;
+ return internal_to_public_wrap_mode (sampler_state->wrap_mode_p);
}
CoglPipelineWrapMode
@@ -677,17 +717,17 @@ cogl_pipeline_get_layer_wrap_mode_p (CoglPipeline *pipeline, int layer_index)
void
_cogl_pipeline_layer_get_wrap_modes (CoglPipelineLayer *layer,
- CoglPipelineWrapModeInternal *wrap_mode_s,
- CoglPipelineWrapModeInternal *wrap_mode_t,
- CoglPipelineWrapModeInternal *wrap_mode_p)
+ CoglSamplerCacheWrapMode *wrap_mode_s,
+ CoglSamplerCacheWrapMode *wrap_mode_t,
+ CoglSamplerCacheWrapMode *wrap_mode_p)
{
CoglPipelineLayer *authority =
_cogl_pipeline_layer_get_authority (layer,
- COGL_PIPELINE_LAYER_STATE_WRAP_MODES);
+ COGL_PIPELINE_LAYER_STATE_SAMPLER);
- *wrap_mode_s = authority->wrap_mode_s;
- *wrap_mode_t = authority->wrap_mode_t;
- *wrap_mode_p = authority->wrap_mode_p;
+ *wrap_mode_s = authority->sampler_cache_entry->wrap_mode_s;
+ *wrap_mode_t = authority->sampler_cache_entry->wrap_mode_t;
+ *wrap_mode_p = authority->sampler_cache_entry->wrap_mode_p;
}
gboolean
@@ -989,45 +1029,14 @@ _cogl_pipeline_layer_combine_constant_equal (CoglPipelineLayer *authority0,
}
gboolean
-_cogl_pipeline_layer_filters_equal (CoglPipelineLayer *authority0,
+_cogl_pipeline_layer_sampler_equal (CoglPipelineLayer *authority0,
CoglPipelineLayer *authority1)
{
- if (authority0->mag_filter != authority1->mag_filter)
- return FALSE;
- if (authority0->min_filter != authority1->min_filter)
- return FALSE;
-
- return TRUE;
-}
-
-static gboolean
-compare_wrap_mode_equal (CoglPipelineWrapMode wrap_mode0,
- CoglPipelineWrapMode wrap_mode1)
-{
- /* We consider AUTOMATIC to be equivalent to CLAMP_TO_EDGE because
- the primitives code is expected to override this to something
- else if it wants it to be behave any other way */
- if (wrap_mode0 == COGL_PIPELINE_WRAP_MODE_AUTOMATIC)
- wrap_mode0 = COGL_PIPELINE_WRAP_MODE_CLAMP_TO_EDGE;
- if (wrap_mode1 == COGL_PIPELINE_WRAP_MODE_AUTOMATIC)
- wrap_mode1 = COGL_PIPELINE_WRAP_MODE_CLAMP_TO_EDGE;
-
- return wrap_mode0 == wrap_mode1;
-}
-
-gboolean
-_cogl_pipeline_layer_wrap_modes_equal (CoglPipelineLayer *authority0,
- CoglPipelineLayer *authority1)
-{
- if (!compare_wrap_mode_equal (authority0->wrap_mode_s,
- authority1->wrap_mode_s) ||
- !compare_wrap_mode_equal (authority0->wrap_mode_t,
- authority1->wrap_mode_t) ||
- !compare_wrap_mode_equal (authority0->wrap_mode_p,
- authority1->wrap_mode_p))
- return FALSE;
-
- return TRUE;
+ /* We compare the actual sampler objects rather than just the entry
+ pointers because two states with different values can lead to the
+ same state in GL terms when AUTOMATIC is used as a wrap mode */
+ return (authority0->sampler_cache_entry->sampler_object ==
+ authority1->sampler_cache_entry->sampler_object);
}
gboolean
@@ -1500,10 +1509,10 @@ _cogl_pipeline_layer_get_filters (CoglPipelineLayer *layer,
{
CoglPipelineLayer *authority =
_cogl_pipeline_layer_get_authority (layer,
- COGL_PIPELINE_LAYER_STATE_FILTERS);
+ COGL_PIPELINE_LAYER_STATE_SAMPLER);
- *min_filter = authority->min_filter;
- *mag_filter = authority->mag_filter;
+ *min_filter = authority->sampler_cache_entry->min_filter;
+ *mag_filter = authority->sampler_cache_entry->mag_filter;
}
void
@@ -1521,10 +1530,10 @@ _cogl_pipeline_get_layer_filters (CoglPipeline *pipeline,
authority =
_cogl_pipeline_layer_get_authority (layer,
- COGL_PIPELINE_LAYER_STATE_FILTERS);
+ COGL_PIPELINE_LAYER_STATE_SAMPLER);
- *min_filter = authority->min_filter;
- *mag_filter = authority->mag_filter;
+ *min_filter = authority->sampler_cache_entry->min_filter;
+ *mag_filter = authority->sampler_cache_entry->mag_filter;
}
CoglPipelineFilter
@@ -1560,9 +1569,9 @@ _cogl_pipeline_layer_get_min_filter (CoglPipelineLayer *layer)
authority =
_cogl_pipeline_layer_get_authority (layer,
- COGL_PIPELINE_LAYER_STATE_FILTERS);
+ COGL_PIPELINE_LAYER_STATE_SAMPLER);
- return authority->min_filter;
+ return authority->sampler_cache_entry->min_filter;
}
CoglPipelineFilter
@@ -1574,9 +1583,9 @@ _cogl_pipeline_layer_get_mag_filter (CoglPipelineLayer *layer)
authority =
_cogl_pipeline_layer_get_authority (layer,
- COGL_PIPELINE_LAYER_STATE_FILTERS);
+ COGL_PIPELINE_LAYER_STATE_SAMPLER);
- return authority->mag_filter;
+ return authority->sampler_cache_entry->mag_filter;
}
void
@@ -1585,10 +1594,12 @@ cogl_pipeline_set_layer_filters (CoglPipeline *pipeline,
CoglPipelineFilter min_filter,
CoglPipelineFilter mag_filter)
{
- CoglPipelineLayerState state = COGL_PIPELINE_LAYER_STATE_FILTERS;
- CoglPipelineLayer *layer;
- CoglPipelineLayer *authority;
- CoglPipelineLayer *new;
+ CoglPipelineLayerState state = COGL_PIPELINE_LAYER_STATE_SAMPLER;
+ CoglPipelineLayer *layer;
+ CoglPipelineLayer *authority;
+ const CoglSamplerCacheEntry *sampler_state;
+
+ _COGL_GET_CONTEXT (ctx, NO_RETVAL);
_COGL_RETURN_IF_FAIL (cogl_is_pipeline (pipeline));
@@ -1604,52 +1615,27 @@ cogl_pipeline_set_layer_filters (CoglPipeline *pipeline,
* state we want to change */
authority = _cogl_pipeline_layer_get_authority (layer, state);
- if (authority->min_filter == min_filter &&
- authority->mag_filter == mag_filter)
- return;
-
- new = _cogl_pipeline_layer_pre_change_notify (pipeline, layer, state);
- if (new != layer)
- layer = new;
- else
- {
- /* If the original layer we found is currently the authority on
- * the state we are changing see if we can revert to one of our
- * ancestors being the authority. */
- if (layer == authority &&
- _cogl_pipeline_layer_get_parent (authority) != NULL)
- {
- CoglPipelineLayer *parent =
- _cogl_pipeline_layer_get_parent (authority);
- CoglPipelineLayer *old_authority =
- _cogl_pipeline_layer_get_authority (parent, state);
-
- if (old_authority->min_filter == min_filter &&
- old_authority->mag_filter == mag_filter)
- {
- layer->differences &= ~state;
+ sampler_state =
+ _cogl_sampler_cache_update_filters (ctx->sampler_cache,
+ authority->sampler_cache_entry,
+ min_filter,
+ mag_filter);
+ _cogl_pipeline_set_layer_sampler_state (pipeline,
+ layer,
+ authority,
+ sampler_state);
+}
- g_assert (layer->owner == pipeline);
- if (layer->differences == 0)
- _cogl_pipeline_prune_empty_layer_difference (pipeline,
- layer);
- return;
- }
- }
- }
+const CoglSamplerCacheEntry *
+_cogl_pipeline_layer_get_sampler_state (CoglPipelineLayer *layer)
+{
+ CoglPipelineLayer *authority;
- layer->min_filter = min_filter;
- layer->mag_filter = mag_filter;
+ authority =
+ _cogl_pipeline_layer_get_authority (layer,
+ COGL_PIPELINE_LAYER_STATE_SAMPLER);
- /* If we weren't previously the authority on this state then we need
- * to extended our differences mask and so it's possible that some
- * of our ancestry will now become redundant, so we aim to reparent
- * ourselves if that's true... */
- if (layer != authority)
- {
- layer->differences |= state;
- _cogl_pipeline_layer_prune_redundant_ancestry (layer);
- }
+ return authority->sampler_cache_entry;
}
void
@@ -1688,31 +1674,14 @@ _cogl_pipeline_layer_hash_texture_data_state (CoglPipelineLayer *authority,
}
void
-_cogl_pipeline_layer_hash_filters_state (CoglPipelineLayer *authority,
+_cogl_pipeline_layer_hash_sampler_state (CoglPipelineLayer *authority,
CoglPipelineLayer **authorities,
CoglPipelineHashState *state)
{
- unsigned int hash = state->hash;
- hash = _cogl_util_one_at_a_time_hash (hash, &authority->mag_filter,
- sizeof (authority->mag_filter));
- hash = _cogl_util_one_at_a_time_hash (hash, &authority->min_filter,
- sizeof (authority->min_filter));
- state->hash = hash;
-}
-
-void
-_cogl_pipeline_layer_hash_wrap_modes_state (CoglPipelineLayer *authority,
- CoglPipelineLayer **authorities,
- CoglPipelineHashState *state)
-{
- unsigned int hash = state->hash;
- hash = _cogl_util_one_at_a_time_hash (hash, &authority->wrap_mode_s,
- sizeof (authority->wrap_mode_s));
- hash = _cogl_util_one_at_a_time_hash (hash, &authority->wrap_mode_t,
- sizeof (authority->wrap_mode_t));
- hash = _cogl_util_one_at_a_time_hash (hash, &authority->wrap_mode_p,
- sizeof (authority->wrap_mode_p));
- state->hash = hash;
+ state->hash =
+ _cogl_util_one_at_a_time_hash (state->hash,
+ &authority->sampler_cache_entry,
+ sizeof (authority->sampler_cache_entry));
}
void
diff --git a/cogl/cogl-pipeline-layer.c b/cogl/cogl-pipeline-layer.c
index 558a8b6..9093a04 100644
--- a/cogl/cogl-pipeline-layer.c
+++ b/cogl/cogl-pipeline-layer.c
@@ -170,21 +170,13 @@ _cogl_pipeline_layer_init_multi_property_sparse_state (
case COGL_PIPELINE_LAYER_STATE_POINT_SPRITE_COORDS:
case COGL_PIPELINE_LAYER_STATE_USER_MATRIX:
case COGL_PIPELINE_LAYER_STATE_COMBINE_CONSTANT:
+ case COGL_PIPELINE_LAYER_STATE_SAMPLER:
g_return_if_reached ();
/* XXX: technically we could probably even consider these as
* single property state-groups from the pov that currently the
* corresponding property setters always update all of the values
* at the same time. */
- case COGL_PIPELINE_LAYER_STATE_FILTERS:
- layer->min_filter = authority->min_filter;
- layer->mag_filter = authority->mag_filter;
- break;
- case COGL_PIPELINE_LAYER_STATE_WRAP_MODES:
- layer->wrap_mode_s = authority->wrap_mode_s;
- layer->wrap_mode_t = authority->wrap_mode_t;
- layer->wrap_mode_p = authority->wrap_mode_p;
- break;
case COGL_PIPELINE_LAYER_STATE_COMBINE:
{
int n_args;
@@ -576,16 +568,10 @@ _cogl_pipeline_layer_equal (CoglPipelineLayer *layer0,
_cogl_pipeline_layer_combine_constant_equal))
return FALSE;
- if (layers_difference & COGL_PIPELINE_LAYER_STATE_FILTERS &&
- !layer_state_equal (COGL_PIPELINE_LAYER_STATE_FILTERS_INDEX,
- authorities0, authorities1,
- _cogl_pipeline_layer_filters_equal))
- return FALSE;
-
- if (layers_difference & COGL_PIPELINE_LAYER_STATE_WRAP_MODES &&
- !layer_state_equal (COGL_PIPELINE_LAYER_STATE_WRAP_MODES_INDEX,
+ if (layers_difference & COGL_PIPELINE_LAYER_STATE_SAMPLER &&
+ !layer_state_equal (COGL_PIPELINE_LAYER_STATE_SAMPLER_INDEX,
authorities0, authorities1,
- _cogl_pipeline_layer_wrap_modes_equal))
+ _cogl_pipeline_layer_sampler_equal))
return FALSE;
if (layers_difference & COGL_PIPELINE_LAYER_STATE_USER_MATRIX &&
@@ -657,12 +643,8 @@ _cogl_pipeline_init_default_layers (void)
layer->texture = NULL;
layer->texture_type = COGL_TEXTURE_TYPE_2D;
- layer->mag_filter = COGL_PIPELINE_FILTER_LINEAR;
- layer->min_filter = COGL_PIPELINE_FILTER_LINEAR;
-
- layer->wrap_mode_s = COGL_PIPELINE_WRAP_MODE_AUTOMATIC;
- layer->wrap_mode_t = COGL_PIPELINE_WRAP_MODE_AUTOMATIC;
- layer->wrap_mode_p = COGL_PIPELINE_WRAP_MODE_AUTOMATIC;
+ layer->sampler_cache_entry =
+ _cogl_sampler_cache_get_default_entry (ctx->sampler_cache);
layer->big_state = big_state;
layer->has_big_state = TRUE;
diff --git a/cogl/cogl-pipeline-opengl.c b/cogl/cogl-pipeline-opengl.c
index a763240..fc331d0 100644
--- a/cogl/cogl-pipeline-opengl.c
+++ b/cogl/cogl-pipeline-opengl.c
@@ -844,6 +844,16 @@ flush_layers_common_gl_state_cb (CoglPipelineLayer *layer, void *user_data)
unit->texture_storage_changed = FALSE;
}
+ if ((layers_difference & COGL_PIPELINE_LAYER_STATE_SAMPLER) &&
+ (ctx->private_feature_flags & COGL_PRIVATE_FEATURE_SAMPLER_OBJECTS))
+ {
+ const CoglSamplerCacheEntry *sampler_state;
+
+ sampler_state = _cogl_pipeline_layer_get_sampler_state (layer);
+
+ GE( ctx, glBindSampler (unit_index, sampler_state->sampler_object) );
+ }
+
/* Under GLES2 the fragment shader will use gl_PointCoord instead of
replacing the texture coordinates */
#if defined (HAVE_COGL_GLES) || defined (HAVE_COGL_GL)
@@ -904,7 +914,7 @@ static void
_cogl_pipeline_layer_forward_wrap_modes (CoglPipelineLayer *layer,
CoglTexture *texture)
{
- CoglPipelineWrapModeInternal wrap_mode_s, wrap_mode_t, wrap_mode_p;
+ CoglSamplerCacheWrapMode wrap_mode_s, wrap_mode_t, wrap_mode_p;
GLenum gl_wrap_mode_s, gl_wrap_mode_t, gl_wrap_mode_p;
if (texture == NULL)
@@ -926,17 +936,17 @@ _cogl_pipeline_layer_forward_wrap_modes (CoglPipelineLayer *layer,
will break if the application tries to use different modes in
different layers using the same texture. */
- if (wrap_mode_s == COGL_PIPELINE_WRAP_MODE_INTERNAL_AUTOMATIC)
+ if (wrap_mode_s == COGL_SAMPLER_CACHE_WRAP_MODE_AUTOMATIC)
gl_wrap_mode_s = GL_CLAMP_TO_EDGE;
else
gl_wrap_mode_s = wrap_mode_s;
- if (wrap_mode_t == COGL_PIPELINE_WRAP_MODE_INTERNAL_AUTOMATIC)
+ if (wrap_mode_t == COGL_SAMPLER_CACHE_WRAP_MODE_AUTOMATIC)
gl_wrap_mode_t = GL_CLAMP_TO_EDGE;
else
gl_wrap_mode_t = wrap_mode_t;
- if (wrap_mode_p == COGL_PIPELINE_WRAP_MODE_INTERNAL_AUTOMATIC)
+ if (wrap_mode_p == COGL_SAMPLER_CACHE_WRAP_MODE_AUTOMATIC)
gl_wrap_mode_p = GL_CLAMP_TO_EDGE;
else
gl_wrap_mode_p = wrap_mode_p;
@@ -952,8 +962,10 @@ _cogl_pipeline_layer_forward_wrap_modes (CoglPipelineLayer *layer,
* the filter and repeat modes whenever we use a texture since it may
* be referenced by multiple pipelines with different modes.
*
- * XXX: GL_ARB_sampler_objects fixes this in OpenGL so we should
- * eventually look at using this extension when available.
+ * This function is bypassed in favour of sampler objects if
+ * GL_ARB_sampler_objects is advertised. This fallback won't work if
+ * the same texture is bound to multiple layers with different sampler
+ * state.
*/
static void
foreach_texture_unit_update_filter_and_wrap_modes (void)
@@ -1399,7 +1411,8 @@ done:
/* Handle the fact that OpenGL associates texture filter and wrap
* modes with the texture objects not the texture units... */
- foreach_texture_unit_update_filter_and_wrap_modes ();
+ if (!(ctx->private_feature_flags & COGL_PRIVATE_FEATURE_SAMPLER_OBJECTS))
+ foreach_texture_unit_update_filter_and_wrap_modes ();
/* If this pipeline has more than one layer then we always need
* to make sure we rebind the texture for unit 1.
diff --git a/cogl/cogl-pipeline.c b/cogl/cogl-pipeline.c
index 7ee1b29..a5f938c 100644
--- a/cogl/cogl-pipeline.c
+++ b/cogl/cogl-pipeline.c
@@ -2572,10 +2572,8 @@ _cogl_pipeline_init_layer_state_hash_functions (void)
_cogl_pipeline_layer_hash_texture_type_state;
layer_state_hash_functions[COGL_PIPELINE_LAYER_STATE_TEXTURE_DATA_INDEX] =
_cogl_pipeline_layer_hash_texture_data_state;
- layer_state_hash_functions[COGL_PIPELINE_LAYER_STATE_FILTERS_INDEX] =
- _cogl_pipeline_layer_hash_filters_state;
- layer_state_hash_functions[COGL_PIPELINE_LAYER_STATE_WRAP_MODES_INDEX] =
- _cogl_pipeline_layer_hash_wrap_modes_state;
+ layer_state_hash_functions[COGL_PIPELINE_LAYER_STATE_SAMPLER_INDEX] =
+ _cogl_pipeline_layer_hash_sampler_state;
layer_state_hash_functions[COGL_PIPELINE_LAYER_STATE_COMBINE_INDEX] =
_cogl_pipeline_layer_hash_combine_state;
layer_state_hash_functions[COGL_PIPELINE_LAYER_STATE_COMBINE_CONSTANT_INDEX] =
@@ -2593,7 +2591,7 @@ _cogl_pipeline_init_layer_state_hash_functions (void)
_cogl_pipeline_layer_hash_fragment_snippets_state;
/* So we get a big error if we forget to update this code! */
- g_assert (COGL_PIPELINE_LAYER_STATE_SPARSE_COUNT == 11);
+ g_assert (COGL_PIPELINE_LAYER_STATE_SPARSE_COUNT == 10);
}
static gboolean
diff --git a/cogl/cogl-sampler-cache-private.h b/cogl/cogl-sampler-cache-private.h
new file mode 100644
index 0000000..4eb7503
--- /dev/null
+++ b/cogl/cogl-sampler-cache-private.h
@@ -0,0 +1,82 @@
+/*
+ * 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/>.
+ *
+ *
+ */
+
+#ifndef __COGL_SAMPLER_CACHE_PRIVATE_H
+#define __COGL_SAMPLER_CACHE_PRIVATE_H
+
+#include "cogl-context.h"
+#include "cogl-gl-header.h"
+
+/* GL_ALWAYS is just used here as a value that is known not to clash
+ * with any valid GL wrap modes.
+ *
+ * XXX: keep the values in sync with the CoglPipelineWrapMode enum
+ * so no conversion is actually needed.
+ */
+typedef enum _CoglSamplerCacheWrapMode
+{
+ COGL_SAMPLER_CACHE_WRAP_MODE_REPEAT = GL_REPEAT,
+ COGL_SAMPLER_CACHE_WRAP_MODE_MIRRORED_REPEAT = GL_MIRRORED_REPEAT,
+ COGL_SAMPLER_CACHE_WRAP_MODE_CLAMP_TO_EDGE = GL_CLAMP_TO_EDGE,
+ COGL_SAMPLER_CACHE_WRAP_MODE_CLAMP_TO_BORDER = GL_CLAMP_TO_BORDER,
+ COGL_SAMPLER_CACHE_WRAP_MODE_AUTOMATIC = GL_ALWAYS
+} CoglSamplerCacheWrapMode;
+
+typedef struct _CoglSamplerCache CoglSamplerCache;
+
+typedef struct _CoglSamplerCacheEntry
+{
+ GLuint sampler_object;
+
+ GLenum min_filter;
+ GLenum mag_filter;
+
+ CoglSamplerCacheWrapMode wrap_mode_s;
+ CoglSamplerCacheWrapMode wrap_mode_t;
+ CoglSamplerCacheWrapMode wrap_mode_p;
+} CoglSamplerCacheEntry;
+
+CoglSamplerCache *
+_cogl_sampler_cache_new (CoglContext *context);
+
+const CoglSamplerCacheEntry *
+_cogl_sampler_cache_get_default_entry (CoglSamplerCache *cache);
+
+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);
+
+const CoglSamplerCacheEntry *
+_cogl_sampler_cache_update_filters (CoglSamplerCache *cache,
+ const CoglSamplerCacheEntry *old_entry,
+ GLenum min_filter,
+ GLenum mag_filter);
+
+void
+_cogl_sampler_cache_free (CoglSamplerCache *cache);
+
+#endif /* __COGL_SAMPLER_CACHE_PRIVATE_H */
diff --git a/cogl/cogl-sampler-cache.c b/cogl/cogl-sampler-cache.c
new file mode 100644
index 0000000..aa0d4a4
--- /dev/null
+++ b/cogl/cogl-sampler-cache.c
@@ -0,0 +1,360 @@
+/*
+ * 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"
+
+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);
+}
+
+static gboolean
+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);
+}
+
+static gboolean
+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);
+}
+
+static gboolean
+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);
+
+ if ((context->private_feature_flags &
+ COGL_PRIVATE_FEATURE_SAMPLER_OBJECTS))
+ {
+ 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;
+
+ if ((context->private_feature_flags &
+ COGL_PRIVATE_FEATURE_SAMPLER_OBJECTS))
+ 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);
+}
diff --git a/cogl/cogl-util.h b/cogl/cogl-util.h
index d657c76..2ad3f26 100644
--- a/cogl/cogl-util.h
+++ b/cogl/cogl-util.h
@@ -96,10 +96,10 @@ _cogl_util_is_pot (unsigned int num)
*/
static inline unsigned int
_cogl_util_one_at_a_time_hash (unsigned int hash,
- void *key,
+ const void *key,
size_t bytes)
{
- unsigned char *p = key;
+ const unsigned char *p = key;
int i;
for (i = 0; i < bytes; i++)
diff --git a/cogl/driver/gl/cogl-gl.c b/cogl/driver/gl/cogl-gl.c
index 6d39033..e2674c4 100644
--- a/cogl/driver/gl/cogl-gl.c
+++ b/cogl/driver/gl/cogl-gl.c
@@ -453,6 +453,9 @@ _cogl_driver_update_features (CoglContext *ctx,
if (_cogl_check_extension ("GL_EXT_packed_depth_stencil", gl_extensions))
private_flags |= COGL_PRIVATE_FEATURE_EXT_PACKED_DEPTH_STENCIL;
+ if (ctx->glGenSamplers)
+ private_flags |= COGL_PRIVATE_FEATURE_SAMPLER_OBJECTS;
+
/* Cache features */
ctx->private_feature_flags |= private_flags;
ctx->feature_flags |= flags;
diff --git a/cogl/gl-prototypes/cogl-all-functions.h b/cogl/gl-prototypes/cogl-all-functions.h
index d58b41f..70b54d3 100644
--- a/cogl/gl-prototypes/cogl-all-functions.h
+++ b/cogl/gl-prototypes/cogl-all-functions.h
@@ -210,3 +210,22 @@ COGL_EXT_FUNCTION (void, glFramebufferTexture2DMultisampleIMG,
GLint level,
GLsizei samples))
COGL_EXT_END ()
+
+COGL_EXT_BEGIN (ARB_sampler_objects, 255, 255,
+ 0, /* not in either GLES */
+ "ARB:\0",
+ "sampler_objects\0")
+COGL_EXT_FUNCTION (void, glGenSamplers,
+ (GLsizei count,
+ GLuint *samplers))
+COGL_EXT_FUNCTION (void, glDeleteSamplers,
+ (GLsizei count,
+ const GLuint *samplers))
+COGL_EXT_FUNCTION (void, glBindSampler,
+ (GLuint unit,
+ GLuint sampler))
+COGL_EXT_FUNCTION (void, glSamplerParameteri,
+ (GLuint sampler,
+ GLenum pname,
+ GLint param))
+COGL_EXT_END ()
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