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mutter/cogl/cogl-pipeline-private.h
Neil Roberts 55427a18a6 Make _cogl_pipeline_get_layer_texture public 
There was no other way to get a pointer to the texture attached to a
pipeline layer apart from the using the CoglMaterial API but I think
this was just an oversight so we should add this in. It is already
maked in the sections file for the gtk-doc.

Reviewed-by: Robert Bragg <robert@linux.intel.com>
2012-02-07 15:25:35 +00:00

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/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2008,2009,2010,2011 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:
* Robert Bragg <robert@linux.intel.com>
*/
#ifndef __COGL_PIPELINE_PRIVATE_H
#define __COGL_PIPELINE_PRIVATE_H
#include "cogl-node-private.h"
#include "cogl-pipeline-layer-private.h"
#include "cogl-pipeline.h"
#include "cogl-matrix.h"
#include "cogl-object-private.h"
#include "cogl-profile.h"
#include "cogl-queue.h"
#include "cogl-internal.h"
#include "cogl-boxed-value.h"
#include "cogl-pipeline-snippet-private.h"
#include <glib.h>
#ifdef HAVE_COGL_GL
#define COGL_PIPELINE_FRAGEND_ARBFP 0
#define COGL_PIPELINE_FRAGEND_FIXED 1
#define COGL_PIPELINE_FRAGEND_GLSL 2
#define COGL_PIPELINE_N_FRAGENDS 3
#else /* HAVE_COGL_GL */
#ifdef HAVE_COGL_GLES2
#define COGL_PIPELINE_FRAGEND_GLSL 0
#ifdef HAVE_COGL_GLES
#define COGL_PIPELINE_FRAGEND_FIXED 1
#define COGL_PIPELINE_N_FRAGENDS 2
#else
#define COGL_PIPELINE_N_FRAGENDS 1
#endif
#else /* HAVE_COGL_GLES2 */
#ifdef HAVE_COGL_GLES
#define COGL_PIPELINE_FRAGEND_FIXED 0
#define COGL_PIPELINE_N_FRAGENDS 1
#else
#error No drivers defined
#endif
#endif /* HAVE_COGL_GLES2 */
#endif /* HAVE_COGL_GL */
#ifdef COGL_PIPELINE_FRAGEND_ARBFP
#define COGL_PIPELINE_FRAGEND_ARBFP_MASK \
(1 << COGL_PIPELINE_FRAGEND_ARBFP)
#endif
#ifdef COGL_PIPELINE_FRAGEND_FIXED
#define COGL_PIPELINE_FRAGEND_FIXED_MASK \
(1 << COGL_PIPELINE_FRAGEND_FIXED)
#endif
#ifdef COGL_PIPELINE_FRAGEND_GLSL
#define COGL_PIPELINE_FRAGEND_GLSL_MASK \
(1 << COGL_PIPELINE_FRAGEND_GLSL)
#endif
#define COGL_PIPELINE_FRAGEND_DEFAULT 0
#define COGL_PIPELINE_FRAGEND_UNDEFINED 3
#ifdef HAVE_COGL_GL
#define COGL_PIPELINE_VERTEND_FIXED 0
#define COGL_PIPELINE_VERTEND_GLSL 1
#define COGL_PIPELINE_N_VERTENDS 2
#else /* HAVE_COGL_GL */
#ifdef HAVE_COGL_GLES2
#define COGL_PIPELINE_VERTEND_GLSL 0
#ifdef HAVE_COGL_GLES
#define COGL_PIPELINE_VERTEND_FIXED 1
#define COGL_PIPELINE_N_VERTENDS 2
#else
#define COGL_PIPELINE_N_VERTENDS 1
#endif
#else /* HAVE_COGL_GLES2 */
#ifdef HAVE_COGL_GLES
#define COGL_PIPELINE_VERTEND_FIXED 0
#define COGL_PIPELINE_N_VERTENDS 1
#else
#error No drivers defined
#endif /* HAVE_COGL_GLES */
#endif /* HAVE_COGL_GLES2 */
#endif /* HAVE_COGL_GL */
#ifdef COGL_PIPELINE_VERTEND_FIXED
#define COGL_PIPELINE_VERTEND_FIXED_MASK \
(1 << COGL_PIPELINE_VERTEND_FIXED)
#endif
#ifdef COGL_PIPELINE_VERTEND_GLSL
#define COGL_PIPELINE_VERTEND_GLSL_MASK \
(1 << COGL_PIPELINE_VERTEND_GLSL)
#endif
#define COGL_PIPELINE_VERTEND_DEFAULT 0
#define COGL_PIPELINE_VERTEND_UNDEFINED 3
#define COGL_PIPELINE_VERTEND_DEFAULT 0
#define COGL_PIPELINE_VERTEND_UNDEFINED 3
/* If we have either of the GLSL backends then we also need a GLSL
progend to combine the shaders generated into a single
program. Same goes for the fixed progends which are used to flush
the matrices */
#ifdef COGL_PIPELINE_FRAGEND_FIXED
#define COGL_PIPELINE_PROGEND_FIXED 0
#ifdef COGL_PIPELINE_FRAGEND_GLSL
#define COGL_PIPELINE_PROGEND_GLSL 1
#define COGL_PIPELINE_N_PROGENDS 2
#else
#define COGL_PIPELINE_N_PROGENDS 1
#endif
#else /* COGL_PIPELINE_FRAGEND_FIXED */
#ifdef COGL_PIPELINE_FRAGEND_GLSL
#define COGL_PIPELINE_PROGEND_GLSL 0
#define COGL_PIPELINE_N_PROGENDS 1
#else
#define COGL_PIPELINE_N_PROGENDS 0
#endif
#endif /* COGL_PIPELINE_FRAGEND_FIXED */
/* XXX: should I rename these as
* COGL_PIPELINE_STATE_INDEX_XYZ... ?
*/
typedef enum
{
/* sparse state */
COGL_PIPELINE_STATE_COLOR_INDEX,
COGL_PIPELINE_STATE_BLEND_ENABLE_INDEX,
COGL_PIPELINE_STATE_LAYERS_INDEX,
COGL_PIPELINE_STATE_LIGHTING_INDEX,
COGL_PIPELINE_STATE_ALPHA_FUNC_INDEX,
COGL_PIPELINE_STATE_ALPHA_FUNC_REFERENCE_INDEX,
COGL_PIPELINE_STATE_BLEND_INDEX,
COGL_PIPELINE_STATE_USER_SHADER_INDEX,
COGL_PIPELINE_STATE_DEPTH_INDEX,
COGL_PIPELINE_STATE_FOG_INDEX,
COGL_PIPELINE_STATE_POINT_SIZE_INDEX,
COGL_PIPELINE_STATE_LOGIC_OPS_INDEX,
COGL_PIPELINE_STATE_CULL_FACE_INDEX,
COGL_PIPELINE_STATE_UNIFORMS_INDEX,
COGL_PIPELINE_STATE_VERTEX_SNIPPETS_INDEX,
COGL_PIPELINE_STATE_FRAGMENT_SNIPPETS_INDEX,
/* non-sparse */
COGL_PIPELINE_STATE_REAL_BLEND_ENABLE_INDEX,
COGL_PIPELINE_STATE_COUNT,
COGL_PIPELINE_STATE_SPARSE_COUNT = COGL_PIPELINE_STATE_COUNT - 1,
} CoglPipelineStateIndex;
/* Used in pipeline->differences masks and for notifying pipeline
* state changes.
*
* XXX: If you add or remove state groups here you may need to update
* some of the state masks following this enum too!
*
* FIXME: perhaps it would be better to rename this enum to
* CoglPipelineStateGroup to better convey the fact that a single enum
* here can map to multiple properties.
*/
typedef enum _CoglPipelineState
{
COGL_PIPELINE_STATE_COLOR =
1L<<COGL_PIPELINE_STATE_COLOR_INDEX,
COGL_PIPELINE_STATE_BLEND_ENABLE =
1L<<COGL_PIPELINE_STATE_BLEND_ENABLE_INDEX,
COGL_PIPELINE_STATE_LAYERS =
1L<<COGL_PIPELINE_STATE_LAYERS_INDEX,
COGL_PIPELINE_STATE_LIGHTING =
1L<<COGL_PIPELINE_STATE_LIGHTING_INDEX,
COGL_PIPELINE_STATE_ALPHA_FUNC =
1L<<COGL_PIPELINE_STATE_ALPHA_FUNC_INDEX,
COGL_PIPELINE_STATE_ALPHA_FUNC_REFERENCE =
1L<<COGL_PIPELINE_STATE_ALPHA_FUNC_REFERENCE_INDEX,
COGL_PIPELINE_STATE_BLEND =
1L<<COGL_PIPELINE_STATE_BLEND_INDEX,
COGL_PIPELINE_STATE_USER_SHADER =
1L<<COGL_PIPELINE_STATE_USER_SHADER_INDEX,
COGL_PIPELINE_STATE_DEPTH =
1L<<COGL_PIPELINE_STATE_DEPTH_INDEX,
COGL_PIPELINE_STATE_FOG =
1L<<COGL_PIPELINE_STATE_FOG_INDEX,
COGL_PIPELINE_STATE_POINT_SIZE =
1L<<COGL_PIPELINE_STATE_POINT_SIZE_INDEX,
COGL_PIPELINE_STATE_LOGIC_OPS =
1L<<COGL_PIPELINE_STATE_LOGIC_OPS_INDEX,
COGL_PIPELINE_STATE_CULL_FACE =
1L<<COGL_PIPELINE_STATE_CULL_FACE_INDEX,
COGL_PIPELINE_STATE_UNIFORMS =
1L<<COGL_PIPELINE_STATE_UNIFORMS_INDEX,
COGL_PIPELINE_STATE_VERTEX_SNIPPETS =
1L<<COGL_PIPELINE_STATE_VERTEX_SNIPPETS_INDEX,
COGL_PIPELINE_STATE_FRAGMENT_SNIPPETS =
1L<<COGL_PIPELINE_STATE_FRAGMENT_SNIPPETS_INDEX,
COGL_PIPELINE_STATE_REAL_BLEND_ENABLE =
1L<<COGL_PIPELINE_STATE_REAL_BLEND_ENABLE_INDEX,
} CoglPipelineState;
/*
* Various special masks that tag state-groups in different ways...
*/
#define COGL_PIPELINE_STATE_ALL \
((1L<<COGL_PIPELINE_STATE_COUNT) - 1)
#define COGL_PIPELINE_STATE_ALL_SPARSE \
(COGL_PIPELINE_STATE_ALL \
& ~COGL_PIPELINE_STATE_REAL_BLEND_ENABLE)
#define COGL_PIPELINE_STATE_AFFECTS_BLENDING \
(COGL_PIPELINE_STATE_COLOR | \
COGL_PIPELINE_STATE_BLEND_ENABLE | \
COGL_PIPELINE_STATE_LAYERS | \
COGL_PIPELINE_STATE_LIGHTING | \
COGL_PIPELINE_STATE_BLEND | \
COGL_PIPELINE_STATE_USER_SHADER | \
COGL_PIPELINE_STATE_VERTEX_SNIPPETS | \
COGL_PIPELINE_STATE_FRAGMENT_SNIPPETS)
#define COGL_PIPELINE_STATE_NEEDS_BIG_STATE \
(COGL_PIPELINE_STATE_LIGHTING | \
COGL_PIPELINE_STATE_ALPHA_FUNC | \
COGL_PIPELINE_STATE_ALPHA_FUNC_REFERENCE | \
COGL_PIPELINE_STATE_BLEND | \
COGL_PIPELINE_STATE_USER_SHADER | \
COGL_PIPELINE_STATE_DEPTH | \
COGL_PIPELINE_STATE_FOG | \
COGL_PIPELINE_STATE_POINT_SIZE | \
COGL_PIPELINE_STATE_LOGIC_OPS | \
COGL_PIPELINE_STATE_CULL_FACE | \
COGL_PIPELINE_STATE_UNIFORMS | \
COGL_PIPELINE_STATE_VERTEX_SNIPPETS | \
COGL_PIPELINE_STATE_FRAGMENT_SNIPPETS)
#define COGL_PIPELINE_STATE_MULTI_PROPERTY \
(COGL_PIPELINE_STATE_LAYERS | \
COGL_PIPELINE_STATE_LIGHTING | \
COGL_PIPELINE_STATE_BLEND | \
COGL_PIPELINE_STATE_DEPTH | \
COGL_PIPELINE_STATE_FOG | \
COGL_PIPELINE_STATE_LOGIC_OPS | \
COGL_PIPELINE_STATE_CULL_FACE | \
COGL_PIPELINE_STATE_UNIFORMS | \
COGL_PIPELINE_STATE_VERTEX_SNIPPETS | \
COGL_PIPELINE_STATE_FRAGMENT_SNIPPETS)
#define COGL_PIPELINE_STATE_AFFECTS_VERTEX_CODEGEN \
(COGL_PIPELINE_STATE_LAYERS | \
COGL_PIPELINE_STATE_USER_SHADER | \
COGL_PIPELINE_STATE_VERTEX_SNIPPETS)
typedef enum
{
COGL_PIPELINE_LIGHTING_STATE_PROPERTY_AMBIENT = 1,
COGL_PIPELINE_LIGHTING_STATE_PROPERTY_DIFFUSE,
COGL_PIPELINE_LIGHTING_STATE_PROPERTY_SPECULAR,
COGL_PIPELINE_LIGHTING_STATE_PROPERTY_EMISSION,
COGL_PIPELINE_LIGHTING_STATE_PROPERTY_SHININESS
} CoglPipelineLightingStateProperty;
typedef struct
{
/* Standard OpenGL lighting model attributes */
float ambient[4];
float diffuse[4];
float specular[4];
float emission[4];
float shininess;
} CoglPipelineLightingState;
typedef struct
{
/* Determines what fragments are discarded based on their alpha */
CoglPipelineAlphaFunc alpha_func;
float alpha_func_reference;
} CoglPipelineAlphaFuncState;
typedef enum _CoglPipelineBlendEnable
{
/* XXX: we want to detect users mistakenly using TRUE or FALSE
* so start the enum at 2. */
COGL_PIPELINE_BLEND_ENABLE_ENABLED = 2,
COGL_PIPELINE_BLEND_ENABLE_DISABLED,
COGL_PIPELINE_BLEND_ENABLE_AUTOMATIC
} CoglPipelineBlendEnable;
typedef struct
{
/* Determines how this pipeline is blended with other primitives */
#if defined(HAVE_COGL_GLES2) || defined(HAVE_COGL_GL)
GLenum blend_equation_rgb;
GLenum blend_equation_alpha;
GLint blend_src_factor_alpha;
GLint blend_dst_factor_alpha;
CoglColor blend_constant;
#endif
GLint blend_src_factor_rgb;
GLint blend_dst_factor_rgb;
} CoglPipelineBlendState;
typedef struct
{
gboolean enabled;
CoglColor color;
CoglFogMode mode;
float density;
float z_near;
float z_far;
} CoglPipelineFogState;
typedef struct
{
CoglColorMask color_mask;
} CoglPipelineLogicOpsState;
typedef struct
{
CoglPipelineCullFaceMode mode;
CoglWinding front_winding;
} CoglPipelineCullFaceState;
typedef struct
{
CoglBitmask override_mask;
/* This is an array of values. Only the uniforms that have a bit set
in override_mask have a corresponding value here. The uniform's
location is implicit from the order in this array */
CoglBoxedValue *override_values;
/* Uniforms that have been modified since this pipeline was last
flushed */
CoglBitmask changed_mask;
} CoglPipelineUniformsState;
typedef struct
{
CoglPipelineLightingState lighting_state;
CoglPipelineAlphaFuncState alpha_state;
CoglPipelineBlendState blend_state;
CoglHandle user_program;
CoglDepthState depth_state;
CoglPipelineFogState fog_state;
float point_size;
CoglPipelineLogicOpsState logic_ops_state;
CoglPipelineCullFaceState cull_face_state;
CoglPipelineUniformsState uniforms_state;
CoglPipelineSnippetList vertex_snippets;
CoglPipelineSnippetList fragment_snippets;
} CoglPipelineBigState;
typedef enum
{
COGL_PIPELINE_FLAG_DIRTY_LAYERS_CACHE = 1L<<0,
COGL_PIPELINE_FLAG_DIRTY_GET_LAYERS_LIST = 1L<<1
} CoglPipelineFlag;
typedef struct
{
CoglPipeline *owner;
CoglPipelineLayer *layer;
} CoglPipelineLayerCacheEntry;
typedef struct _CoglPipelineHashState
{
unsigned long layer_differences;
CoglPipelineEvalFlags flags;
unsigned int hash;
} CoglPipelineHashState;
/*
* CoglPipelineDestroyCallback
* @pipeline: The #CoglPipeline that has been destroyed
* @user_data: The private data associated with the callback
*
* Notifies when a weak pipeline has been destroyed because one
* of its ancestors has been freed or modified.
*/
typedef void (*CoglPipelineDestroyCallback)(CoglPipeline *pipeline,
void *user_data);
struct _CoglPipeline
{
/* XXX: Please think twice about adding members that *have* be
* initialized during a cogl_pipeline_copy. We are aiming to have
* copies be as cheap as possible and copies may be done by the
* primitives APIs which means they may happen in performance
* critical code paths.
*
* XXX: If you are extending the state we track please consider if
* the state is expected to vary frequently across many pipelines or
* if the state can be shared among many derived pipelines instead.
* This will determine if the state should be added directly to this
* structure which will increase the memory overhead for *all*
* pipelines or if instead it can go under ->big_state.
*/
/* Layers represent their state in a tree structure where some of
* the state relating to a given pipeline or layer may actually be
* owned by one if is ancestors in the tree. We have a common data
* type to track the tree heirachy so we can share code... */
CoglNode _parent;
/* We need to track if a pipeline is referenced in the journal
* because we can't allow modification to these pipelines without
* flushing the journal first */
unsigned long journal_ref_count;
/* When weak pipelines are destroyed the user is notified via this
* callback */
CoglPipelineDestroyCallback destroy_callback;
/* When notifying that a weak pipeline has been destroyed this
* private data is passed to the above callback */
void *destroy_data;
/* A mask of which sparse state groups are different in this
* pipeline in comparison to its parent. */
unsigned long differences;
/* Whenever a pipeline is modified we increment the age. There's no
* guarantee that it won't wrap but it can nevertheless be a
* convenient mechanism to determine when a pipeline has been
* changed to you can invalidate some some associated cache that
* depends on the old state. */
unsigned long age;
/* This is the primary color of the pipeline.
*
* This is a sparse property, ref COGL_PIPELINE_STATE_COLOR */
CoglColor color;
/* A pipeline may be made up with multiple layers used to combine
* textures together.
*
* This is sparse state, ref COGL_PIPELINE_STATE_LAYERS */
GList *layer_differences;
unsigned int n_layers;
/* As a basic way to reduce memory usage we divide the pipeline
* state into two groups; the minimal state modified in 90% of
* all pipelines and the rest, so that the second group can
* be allocated dynamically when required... */
CoglPipelineBigState *big_state;
/* For debugging purposes it's possible to associate a static const
* string with a pipeline which can be an aid when trying to trace
* where the pipeline originates from */
const char *static_breadcrumb;
/* Cached state... */
/* A cached, complete list of the layers this pipeline depends
* on sorted by layer->unit_index. */
CoglPipelineLayer **layers_cache;
/* To avoid a separate ->layers_cache allocation for common
* pipelines with only a few layers... */
CoglPipelineLayer *short_layers_cache[3];
/* The deprecated cogl_pipeline_get_layers() API returns a
* const GList of layers, which we track here... */
GList *deprecated_get_layers_list;
/* XXX: consider adding an authorities cache to speed up sparse
* property value lookups:
* CoglPipeline *authorities_cache[COGL_PIPELINE_N_SPARSE_PROPERTIES];
* and corresponding authorities_cache_dirty:1 bitfield
*/
/* bitfields */
/* Weak pipelines don't count as dependants on their parents which
* means that the parent pipeline can be modified without
* considering how the modifications may affect the weak pipeline.
*/
unsigned int is_weak:1;
/* Determines if pipeline->big_state is valid */
unsigned int has_big_state:1;
/* By default blending is enabled automatically depending on the
* unlit color, the lighting colors or the texture format. The user
* can override this to explicitly enable or disable blending.
*
* This is a sparse property */
unsigned int blend_enable:3;
/* There are many factors that can determine if we need to enable
* blending, this holds our final decision */
unsigned int real_blend_enable:1;
unsigned int layers_cache_dirty:1;
unsigned int deprecated_get_layers_list_dirty:1;
/* For debugging purposes it's possible to associate a static const
* string with a pipeline which can be an aid when trying to trace
* where the pipeline originates from */
unsigned int has_static_breadcrumb:1;
/* There are multiple fragment processing backends for CoglPipeline,
* glsl, arbfp and fixed. This identifies the backend being used for
* the pipeline and any private state the backend has associated
* with the pipeline. */
unsigned int fragend:3;
unsigned int vertend:3;
};
typedef struct _CoglPipelineFragend
{
gboolean (*start) (CoglPipeline *pipeline,
int n_layers,
unsigned long pipelines_difference,
int n_tex_coord_attribs);
gboolean (*add_layer) (CoglPipeline *pipeline,
CoglPipelineLayer *layer,
unsigned long layers_difference);
gboolean (*passthrough) (CoglPipeline *pipeline);
gboolean (*end) (CoglPipeline *pipeline,
unsigned long pipelines_difference);
void (*pipeline_pre_change_notify) (CoglPipeline *pipeline,
CoglPipelineState change,
const CoglColor *new_color);
void (*pipeline_set_parent_notify) (CoglPipeline *pipeline);
void (*layer_pre_change_notify) (CoglPipeline *owner,
CoglPipelineLayer *layer,
CoglPipelineLayerState change);
} CoglPipelineFragend;
typedef struct _CoglPipelineVertend
{
gboolean (*start) (CoglPipeline *pipeline,
int n_layers,
unsigned long pipelines_difference,
int n_tex_coord_attribs);
gboolean (*add_layer) (CoglPipeline *pipeline,
CoglPipelineLayer *layer,
unsigned long layers_difference);
gboolean (*end) (CoglPipeline *pipeline,
unsigned long pipelines_difference);
void (*pipeline_pre_change_notify) (CoglPipeline *pipeline,
CoglPipelineState change,
const CoglColor *new_color);
void (*layer_pre_change_notify) (CoglPipeline *owner,
CoglPipelineLayer *layer,
CoglPipelineLayerState change);
} CoglPipelineVertend;
typedef struct
{
void (*end) (CoglPipeline *pipeline,
unsigned long pipelines_difference,
int n_tex_coord_attribs);
void (*pipeline_pre_change_notify) (CoglPipeline *pipeline,
CoglPipelineState change,
const CoglColor *new_color);
void (*layer_pre_change_notify) (CoglPipeline *owner,
CoglPipelineLayer *layer,
CoglPipelineLayerState change);
/* This is called after all of the other functions whenever the
pipeline is flushed, even if the pipeline hasn't changed since
the last flush */
void (* pre_paint) (CoglPipeline *pipeline);
} CoglPipelineProgend;
typedef enum
{
COGL_PIPELINE_PROGRAM_TYPE_GLSL = 1,
COGL_PIPELINE_PROGRAM_TYPE_ARBFP,
COGL_PIPELINE_PROGRAM_TYPE_FIXED
} CoglPipelineProgramType;
extern const CoglPipelineFragend *
_cogl_pipeline_fragends[COGL_PIPELINE_N_FRAGENDS];
extern const CoglPipelineVertend *
_cogl_pipeline_vertends[COGL_PIPELINE_N_VERTENDS];
extern const CoglPipelineProgend *
_cogl_pipeline_progends[];
void
_cogl_pipeline_init_default_pipeline (void);
static inline CoglPipeline *
_cogl_pipeline_get_parent (CoglPipeline *pipeline)
{
CoglNode *parent_node = COGL_NODE (pipeline)->parent;
return COGL_PIPELINE (parent_node);
}
static inline CoglPipeline *
_cogl_pipeline_get_authority (CoglPipeline *pipeline,
unsigned long difference)
{
CoglPipeline *authority = pipeline;
while (!(authority->differences & difference))
authority = _cogl_pipeline_get_parent (authority);
return authority;
}
typedef gboolean (*CoglPipelineStateComparitor) (CoglPipeline *authority0,
CoglPipeline *authority1);
void
_cogl_pipeline_update_authority (CoglPipeline *pipeline,
CoglPipeline *authority,
CoglPipelineState state,
CoglPipelineStateComparitor comparitor);
void
_cogl_pipeline_pre_change_notify (CoglPipeline *pipeline,
CoglPipelineState change,
const CoglColor *new_color,
gboolean from_layer_change);
void
_cogl_pipeline_prune_redundant_ancestry (CoglPipeline *pipeline);
void _cogl_pipeline_update_blend_enable (CoglPipeline *pipeline,
CoglPipelineState changes);
CoglPipelineLayer *
_cogl_pipeline_get_layer (CoglPipeline *pipeline,
int layer_index);
gboolean
_cogl_is_pipeline_layer (void *object);
void
_cogl_pipeline_prune_empty_layer_difference (CoglPipeline *layers_authority,
CoglPipelineLayer *layer);
/*
* SECTION:cogl-pipeline-internals
* @short_description: Functions for creating custom primitives that make use
* of Cogl pipelines for filling.
*
* Normally you shouldn't need to use this API directly, but if you need to
* developing a custom/specialised primitive - probably using raw OpenGL - then
* this API aims to expose enough of the pipeline internals to support being
* able to fill your geometry according to a given Cogl pipeline.
*/
gboolean
_cogl_pipeline_get_real_blend_enabled (CoglPipeline *pipeline);
/*
* Calls the pre_paint method on the layer texture if there is
* one. This will determine whether mipmaps are needed based on the
* filter settings.
*/
void
_cogl_pipeline_pre_paint_for_layer (CoglPipeline *pipeline,
int layer_id);
/*
* CoglPipelineFlushFlag:
* @COGL_PIPELINE_FLUSH_FALLBACK_MASK: The fallback_layers member is set to
* a guint32 mask of the layers that can't be supported with the user
* supplied texture and need to be replaced with fallback textures. (1 =
* fallback, and the least significant bit = layer 0)
* @COGL_PIPELINE_FLUSH_DISABLE_MASK: The disable_layers member is set to
* a guint32 mask of the layers that you want to completly disable
* texturing for (1 = fallback, and the least significant bit = layer 0)
* @COGL_PIPELINE_FLUSH_LAYER0_OVERRIDE: The layer0_override_texture member is
* set to a GLuint OpenGL texture name to override the texture used for
* layer 0 of the pipeline. This is intended for dealing with sliced
* textures where you will need to point to each of the texture slices in
* turn when drawing your geometry. Passing a value of 0 is the same as
* not passing the option at all.
* @COGL_PIPELINE_FLUSH_SKIP_GL_COLOR: When flushing the GL state for the
* pipeline don't call glColor.
*/
typedef enum _CoglPipelineFlushFlag
{
COGL_PIPELINE_FLUSH_FALLBACK_MASK = 1L<<0,
COGL_PIPELINE_FLUSH_DISABLE_MASK = 1L<<1,
COGL_PIPELINE_FLUSH_LAYER0_OVERRIDE = 1L<<2,
COGL_PIPELINE_FLUSH_SKIP_GL_COLOR = 1L<<3
} CoglPipelineFlushFlag;
/*
* CoglPipelineFlushOptions:
*
*/
typedef struct _CoglPipelineFlushOptions
{
CoglPipelineFlushFlag flags;
guint32 fallback_layers;
guint32 disable_layers;
CoglTexture *layer0_override_texture;
} CoglPipelineFlushOptions;
void
_cogl_use_fragment_program (GLuint gl_program, CoglPipelineProgramType type);
void
_cogl_use_vertex_program (GLuint gl_program, CoglPipelineProgramType type);
unsigned int
_cogl_get_n_args_for_combine_func (CoglPipelineCombineFunc func);
/*
* _cogl_pipeline_weak_copy:
* @pipeline: A #CoglPipeline object
* @callback: A callback to notify when your weak pipeline is destroyed
* @user_data: Private data to pass to your given callback.
*
* Returns a weak copy of the given source @pipeline. Unlike a normal
* copy no internal reference is taken on the source @pipeline and you
* can expect that later modifications of the source pipeline (or in
* fact any other pipeline) can result in the weak pipeline being
* destroyed.
*
* To understand this better its good to know a bit about the internal
* design of #CoglPipeline...
*
* Internally #CoglPipeline<!-- -->s are represented as a graph of
* property diff's, where each node is a diff of properties that gets
* applied on top of its parent. Copying a pipeline creates an empty
* diff and a child->parent relationship between the empty diff and
* the source @pipeline, parent.
*
* Because of this internal graph design a single #CoglPipeline may
* indirectly depend on a chain of ancestors to fully define all of
* its properties. Because a node depends on its ancestors it normally
* owns a reference to its parent to stop it from being freed. Also if
* you try to modify a pipeline with children we internally use a
* copy-on-write mechanism to ensure that you don't indirectly change
* the properties those children.
*
* Weak pipelines avoid the use of copy-on-write to preserve the
* integrity of weak dependants and instead weak dependants are
* simply destroyed allowing the parent to be modified directly. Also
* because weak pipelines don't own a reference to their parent they
* won't stop the source @pipeline from being freed when the user
* releases their reference on it.
*
* Because weak pipelines don't own a reference on their parent they
* are the recommended mechanism for creating derived pipelines that you
* want to cache as a private property of the original pipeline
* because they won't result in a circular dependency.
*
* An example use case:
*
* Consider for example you are implementing a custom primitive that is
* not compatible with certain source pipelines. To handle this you
* implement a validation stage that given an arbitrary pipeline as
* input will create a derived pipeline that is suitable for drawing
* your primitive.
*
* Because you don't want to have to repeat this validation every time
* the same incompatible pipeline is given as input you want to cache
* the result as a private property of the original pipeline. If the
* derived pipeline were created using cogl_pipeline_copy that would
* create a circular dependency so the original pipeline can never be
* freed.
*
* If you instead create a weak copy you won't stop the original pipeline
* from being freed if it's no longer needed, and you will instead simply
* be notified that your weak pipeline has been destroyed.
*
* This is the recommended coding pattern for validating an input
* pipeline and caching a derived result:
* |[
* static CoglUserDataKey _cogl_my_cache_key;
*
* typedef struct {
* CoglPipeline *validated_source;
* } MyValidatedMaterialCache;
*
* static void
* destroy_cache_cb (CoglObject *object, void *user_data)
* {
* g_slice_free (MyValidatedMaterialCache, user_data);
* }
*
* static void
* invalidate_cache_cb (CoglPipeline *destroyed, void *user_data)
* {
* MyValidatedMaterialCache *cache = user_data;
* cogl_object_unref (cache->validated_source);
* cache->validated_source = NULL;
* }
*
* static CoglPipeline *
* get_validated_pipeline (CoglPipeline *source)
* {
* MyValidatedMaterialCache *cache =
* cogl_object_get_user_data (COGL_OBJECT (source),
* &_cogl_my_cache_key);
* if (G_UNLIKELY (cache == NULL))
* {
* cache = g_slice_new (MyValidatedMaterialCache);
* cogl_object_set_user_data (COGL_OBJECT (source),
* &_cogl_my_cache_key,
* cache, destroy_cache_cb);
* cache->validated_source = source;
* }
*
* if (G_UNLIKELY (cache->validated_source == NULL))
* {
* cache->validated_source = source;
*
* /&nbsp;* Start validating source... *&nbsp;/
*
* /&nbsp;* If you find you need to change something... *&nbsp;/
* if (cache->validated_source == source)
* cache->validated_source =
* cogl_pipeline_weak_copy (source,
* invalidate_cache_cb,
* cache);
*
* /&nbsp;* Modify cache->validated_source *&nbsp;/
* }
*
* return cache->validated_source;
* }
* ]|
*/
CoglPipeline *
_cogl_pipeline_weak_copy (CoglPipeline *pipeline,
CoglPipelineDestroyCallback callback,
void *user_data);
void
_cogl_pipeline_set_fragend (CoglPipeline *pipeline, int fragend);
void
_cogl_pipeline_set_vertend (CoglPipeline *pipeline, int vertend);
CoglPipeline *
_cogl_pipeline_get_parent (CoglPipeline *pipeline);
void
_cogl_pipeline_get_colorubv (CoglPipeline *pipeline,
guint8 *color);
/* XXX: At some point it could be good for this to accept a mask of
* the state groups we are interested in comparing since we can
* probably use that information in a number situations to reduce
* the work we do. */
unsigned long
_cogl_pipeline_compare_differences (CoglPipeline *pipeline0,
CoglPipeline *pipeline1);
gboolean
_cogl_pipeline_equal (CoglPipeline *pipeline0,
CoglPipeline *pipeline1,
unsigned long differences,
unsigned long layer_differences,
CoglPipelineEvalFlags flags);
unsigned int
_cogl_pipeline_hash (CoglPipeline *pipeline,
unsigned long differences,
unsigned long layer_differences,
CoglPipelineEvalFlags flags);
CoglPipeline *
_cogl_pipeline_journal_ref (CoglPipeline *pipeline);
void
_cogl_pipeline_journal_unref (CoglPipeline *pipeline);
const CoglMatrix *
_cogl_pipeline_get_layer_matrix (CoglPipeline *pipeline,
int layer_index);
void
_cogl_pipeline_texture_storage_change_notify (CoglTexture *texture);
void
_cogl_pipeline_apply_legacy_state (CoglPipeline *pipeline);
void
_cogl_pipeline_apply_overrides (CoglPipeline *pipeline,
CoglPipelineFlushOptions *options);
CoglPipelineBlendEnable
_cogl_pipeline_get_blend_enabled (CoglPipeline *pipeline);
void
_cogl_pipeline_set_blend_enabled (CoglPipeline *pipeline,
CoglPipelineBlendEnable enable);
gboolean
_cogl_pipeline_get_fog_enabled (CoglPipeline *pipeline);
void
_cogl_pipeline_set_static_breadcrumb (CoglPipeline *pipeline,
const char *breadcrumb);
unsigned long
_cogl_pipeline_get_age (CoglPipeline *pipeline);
CoglPipeline *
_cogl_pipeline_get_authority (CoglPipeline *pipeline,
unsigned long difference);
void
_cogl_pipeline_add_layer_difference (CoglPipeline *pipeline,
CoglPipelineLayer *layer,
gboolean inc_n_layers);
void
_cogl_pipeline_remove_layer_difference (CoglPipeline *pipeline,
CoglPipelineLayer *layer,
gboolean dec_n_layers);
CoglPipeline *
_cogl_pipeline_find_equivalent_parent (CoglPipeline *pipeline,
CoglPipelineState pipeline_state,
CoglPipelineLayerState layer_state);
void
_cogl_pipeline_get_layer_combine_constant (CoglPipeline *pipeline,
int layer_index,
float *constant);
void
_cogl_pipeline_prune_to_n_layers (CoglPipeline *pipeline, int n);
/*
* API to support the deprecate cogl_pipeline_layer_xyz functions...
*/
const GList *
_cogl_pipeline_get_layers (CoglPipeline *pipeline);
typedef gboolean (*CoglPipelineInternalLayerCallback) (CoglPipelineLayer *layer,
void *user_data);
void
_cogl_pipeline_foreach_layer_internal (CoglPipeline *pipeline,
CoglPipelineInternalLayerCallback callback,
void *user_data);
gboolean
_cogl_pipeline_need_texture_combine_separate
(CoglPipelineLayer *combine_authority);
void
_cogl_pipeline_init_state_hash_functions (void);
void
_cogl_pipeline_init_layer_state_hash_functions (void);
void
_cogl_pipeline_fragend_layer_change_notify (CoglPipeline *owner,
CoglPipelineLayer *layer,
CoglPipelineLayerState change);
CoglPipelineLayerState
_cogl_pipeline_get_layer_state_for_fragment_codegen (CoglContext *context);
CoglPipelineState
_cogl_pipeline_get_state_for_fragment_codegen (CoglContext *context);
void
_cogl_pipeline_vertend_layer_change_notify (CoglPipeline *owner,
CoglPipelineLayer *layer,
CoglPipelineLayerState change);
void
_cogl_pipeline_progend_layer_change_notify (CoglPipeline *owner,
CoglPipelineLayer *layer,
CoglPipelineLayerState change);
#endif /* __COGL_PIPELINE_PRIVATE_H */
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