mirror of
https://github.com/brl/mutter.git
synced 2024-11-29 19:40:43 -05:00
09c2e4abe7
Instead of specifying the hook point when adding to the pipeline using a separate function for each hook, the hook is now a property of the snippet. The hook is set on construction and is then read-only. Reviewed-by: Robert Bragg <robert@linux.intel.com>
526 lines
19 KiB
C
526 lines
19 KiB
C
/*
|
|
* Cogl
|
|
*
|
|
* An object oriented GL/GLES Abstraction/Utility Layer
|
|
*
|
|
* Copyright (C) 2007,2008,2009 Intel Corporation.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*
|
|
*/
|
|
|
|
#if !defined(__COGL_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
|
|
#error "Only <cogl/cogl.h> can be included directly."
|
|
#endif
|
|
|
|
#ifndef __COGL_PIPELINE_LAYER_STATE_H__
|
|
#define __COGL_PIPELINE_LAYER_STATE_H__
|
|
|
|
#include <cogl/cogl-pipeline.h>
|
|
#include <cogl/cogl-color.h>
|
|
#include <cogl/cogl-matrix.h>
|
|
#include <cogl/cogl-texture.h>
|
|
#include <glib.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
#ifdef COGL_ENABLE_EXPERIMENTAL_API
|
|
|
|
/**
|
|
* CoglPipelineFilter:
|
|
* @COGL_PIPELINE_FILTER_NEAREST: Measuring in manhatten distance from the,
|
|
* current pixel center, use the nearest texture texel
|
|
* @COGL_PIPELINE_FILTER_LINEAR: Use the weighted average of the 4 texels
|
|
* nearest the current pixel center
|
|
* @COGL_PIPELINE_FILTER_NEAREST_MIPMAP_NEAREST: Select the mimap level whose
|
|
* texel size most closely matches the current pixel, and use the
|
|
* %COGL_PIPELINE_FILTER_NEAREST criterion
|
|
* @COGL_PIPELINE_FILTER_LINEAR_MIPMAP_NEAREST: Select the mimap level whose
|
|
* texel size most closely matches the current pixel, and use the
|
|
* %COGL_PIPELINE_FILTER_LINEAR criterion
|
|
* @COGL_PIPELINE_FILTER_NEAREST_MIPMAP_LINEAR: Select the two mimap levels
|
|
* whose texel size most closely matches the current pixel, use
|
|
* the %COGL_PIPELINE_FILTER_NEAREST criterion on each one and take
|
|
* their weighted average
|
|
* @COGL_PIPELINE_FILTER_LINEAR_MIPMAP_LINEAR: Select the two mimap levels
|
|
* whose texel size most closely matches the current pixel, use
|
|
* the %COGL_PIPELINE_FILTER_LINEAR criterion on each one and take
|
|
* their weighted average
|
|
*
|
|
* Texture filtering is used whenever the current pixel maps either to more
|
|
* than one texture element (texel) or less than one. These filter enums
|
|
* correspond to different strategies used to come up with a pixel color, by
|
|
* possibly referring to multiple neighbouring texels and taking a weighted
|
|
* average or simply using the nearest texel.
|
|
*/
|
|
typedef enum {
|
|
COGL_PIPELINE_FILTER_NEAREST = 0x2600,
|
|
COGL_PIPELINE_FILTER_LINEAR = 0x2601,
|
|
COGL_PIPELINE_FILTER_NEAREST_MIPMAP_NEAREST = 0x2700,
|
|
COGL_PIPELINE_FILTER_LINEAR_MIPMAP_NEAREST = 0x2701,
|
|
COGL_PIPELINE_FILTER_NEAREST_MIPMAP_LINEAR = 0x2702,
|
|
COGL_PIPELINE_FILTER_LINEAR_MIPMAP_LINEAR = 0x2703
|
|
} CoglPipelineFilter;
|
|
/* NB: these values come from the equivalents in gl.h */
|
|
|
|
/**
|
|
* CoglPipelineWrapMode:
|
|
* @COGL_PIPELINE_WRAP_MODE_REPEAT: The texture will be repeated. This
|
|
* is useful for example to draw a tiled background.
|
|
* @COGL_PIPELINE_WRAP_MODE_CLAMP_TO_EDGE: The coordinates outside the
|
|
* range 0→1 will sample copies of the edge pixels of the
|
|
* texture. This is useful to avoid artifacts if only one copy of
|
|
* the texture is being rendered.
|
|
* @COGL_PIPELINE_WRAP_MODE_AUTOMATIC: Cogl will try to automatically
|
|
* decide which of the above two to use. For cogl_rectangle(), it
|
|
* will use repeat mode if any of the texture coordinates are
|
|
* outside the range 0→1, otherwise it will use clamp to edge. For
|
|
* cogl_polygon() it will always use repeat mode. For
|
|
* cogl_vertex_buffer_draw() it will use repeat mode except for
|
|
* layers that have point sprite coordinate generation enabled. This
|
|
* is the default value.
|
|
*
|
|
* The wrap mode specifies what happens when texture coordinates
|
|
* outside the range 0→1 are used. Note that if the filter mode is
|
|
* anything but %COGL_PIPELINE_FILTER_NEAREST then texels outside the
|
|
* range 0→1 might be used even when the coordinate is exactly 0 or 1
|
|
* because OpenGL will try to sample neighbouring pixels. For example
|
|
* if you are trying to render the full texture then you may get
|
|
* artifacts around the edges when the pixels from the other side are
|
|
* merged in if the wrap mode is set to repeat.
|
|
*
|
|
* Since: 2.0
|
|
*/
|
|
/* 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 CoglPipelineWrapModeInternal
|
|
* enum so no conversion is actually needed.
|
|
*/
|
|
typedef enum {
|
|
COGL_PIPELINE_WRAP_MODE_REPEAT = 0x2901,
|
|
COGL_PIPELINE_WRAP_MODE_MIRRORED_REPEAT = 0x8370,
|
|
COGL_PIPELINE_WRAP_MODE_CLAMP_TO_EDGE = 0x812F,
|
|
COGL_PIPELINE_WRAP_MODE_AUTOMATIC = 0x0207 /* GL_ALWAYS */
|
|
} CoglPipelineWrapMode;
|
|
/* NB: these values come from the equivalents in gl.h */
|
|
|
|
#define cogl_pipeline_set_layer_texture cogl_pipeline_set_layer_texture_EXP
|
|
/**
|
|
* cogl_pipeline_set_layer:
|
|
* @pipeline: A #CoglPipeline object
|
|
* @layer_index: the index of the layer
|
|
* @texture: a #CoglTexture for the layer object
|
|
*
|
|
* In addition to the standard OpenGL lighting model a Cogl pipeline may have
|
|
* one or more layers comprised of textures that can be blended together in
|
|
* order, with a number of different texture combine modes. This function
|
|
* defines a new texture layer.
|
|
*
|
|
* The index values of multiple layers do not have to be consecutive; it is
|
|
* only their relative order that is important.
|
|
*
|
|
* <note>In the future, we may define other types of pipeline layers, such
|
|
* as purely GLSL based layers.</note>
|
|
*
|
|
* Since: 2.0
|
|
*/
|
|
void
|
|
cogl_pipeline_set_layer_texture (CoglPipeline *pipeline,
|
|
int layer_index,
|
|
CoglTexture *texture);
|
|
|
|
#define cogl_pipeline_remove_layer cogl_pipeline_remove_layer_EXP
|
|
/**
|
|
* cogl_pipeline_remove_layer:
|
|
* @pipeline: A #CoglPipeline object
|
|
* @layer_index: Specifies the layer you want to remove
|
|
*
|
|
* This function removes a layer from your pipeline
|
|
*/
|
|
void
|
|
cogl_pipeline_remove_layer (CoglPipeline *pipeline,
|
|
int layer_index);
|
|
|
|
#define cogl_pipeline_set_layer_combine cogl_pipeline_set_layer_combine_EXP
|
|
/**
|
|
* cogl_pipeline_set_layer_combine:
|
|
* @pipeline: A #CoglPipeline object
|
|
* @layer_index: Specifies the layer you want define a combine function for
|
|
* @blend_string: A <link linkend="cogl-Blend-Strings">Cogl blend string</link>
|
|
* describing the desired texture combine function.
|
|
* @error: A #GError that may report parse errors or lack of GPU/driver
|
|
* support. May be %NULL, in which case a warning will be printed out if an
|
|
* error is encountered.
|
|
*
|
|
* If not already familiar; you can refer
|
|
* <link linkend="cogl-Blend-Strings">here</link> for an overview of what blend
|
|
* strings are and there syntax.
|
|
*
|
|
* These are all the functions available for texture combining:
|
|
* <itemizedlist>
|
|
* <listitem>REPLACE(arg0) = arg0</listitem>
|
|
* <listitem>MODULATE(arg0, arg1) = arg0 x arg1</listitem>
|
|
* <listitem>ADD(arg0, arg1) = arg0 + arg1</listitem>
|
|
* <listitem>ADD_SIGNED(arg0, arg1) = arg0 + arg1 - 0.5</listitem>
|
|
* <listitem>INTERPOLATE(arg0, arg1, arg2) = arg0 x arg2 + arg1 x (1 - arg2)</listitem>
|
|
* <listitem>SUBTRACT(arg0, arg1) = arg0 - arg1</listitem>
|
|
* <listitem>
|
|
* <programlisting>
|
|
* DOT3_RGB(arg0, arg1) = 4 x ((arg0[R] - 0.5)) * (arg1[R] - 0.5) +
|
|
* (arg0[G] - 0.5)) * (arg1[G] - 0.5) +
|
|
* (arg0[B] - 0.5)) * (arg1[B] - 0.5))
|
|
* </programlisting>
|
|
* </listitem>
|
|
* <listitem>
|
|
* <programlisting>
|
|
* DOT3_RGBA(arg0, arg1) = 4 x ((arg0[R] - 0.5)) * (arg1[R] - 0.5) +
|
|
* (arg0[G] - 0.5)) * (arg1[G] - 0.5) +
|
|
* (arg0[B] - 0.5)) * (arg1[B] - 0.5))
|
|
* </programlisting>
|
|
* </listitem>
|
|
* </itemizedlist>
|
|
*
|
|
* Refer to the
|
|
* <link linkend="cogl-Blend-String-syntax">color-source syntax</link> for
|
|
* describing the arguments. The valid source names for texture combining
|
|
* are:
|
|
* <variablelist>
|
|
* <varlistentry>
|
|
* <term>TEXTURE</term>
|
|
* <listitem>Use the color from the current texture layer</listitem>
|
|
* </varlistentry>
|
|
* <varlistentry>
|
|
* <term>TEXTURE_0, TEXTURE_1, etc</term>
|
|
* <listitem>Use the color from the specified texture layer</listitem>
|
|
* </varlistentry>
|
|
* <varlistentry>
|
|
* <term>CONSTANT</term>
|
|
* <listitem>Use the color from the constant given with
|
|
* cogl_pipeline_set_layer_constant()</listitem>
|
|
* </varlistentry>
|
|
* <varlistentry>
|
|
* <term>PRIMARY</term>
|
|
* <listitem>Use the color of the pipeline as set with
|
|
* cogl_pipeline_set_color()</listitem>
|
|
* </varlistentry>
|
|
* <varlistentry>
|
|
* <term>PREVIOUS</term>
|
|
* <listitem>Either use the texture color from the previous layer, or
|
|
* if this is layer 0, use the color of the pipeline as set with
|
|
* cogl_pipeline_set_color()</listitem>
|
|
* </varlistentry>
|
|
* </variablelist>
|
|
*
|
|
* <refsect2 id="cogl-Layer-Combine-Examples">
|
|
* <title>Layer Combine Examples</title>
|
|
* <para>This is effectively what the default blending is:</para>
|
|
* <informalexample><programlisting>
|
|
* RGBA = MODULATE (PREVIOUS, TEXTURE)
|
|
* </programlisting></informalexample>
|
|
* <para>This could be used to cross-fade between two images, using
|
|
* the alpha component of a constant as the interpolator. The constant
|
|
* color is given by calling cogl_pipeline_set_layer_constant.</para>
|
|
* <informalexample><programlisting>
|
|
* RGBA = INTERPOLATE (PREVIOUS, TEXTURE, CONSTANT[A])
|
|
* </programlisting></informalexample>
|
|
* </refsect2>
|
|
*
|
|
* <note>You can't give a multiplication factor for arguments as you can
|
|
* with blending.</note>
|
|
*
|
|
* Return value: %TRUE if the blend string was successfully parsed, and the
|
|
* described texture combining is supported by the underlying driver and
|
|
* or hardware. On failure, %FALSE is returned and @error is set
|
|
*
|
|
* Since: 2.0
|
|
*/
|
|
gboolean
|
|
cogl_pipeline_set_layer_combine (CoglPipeline *pipeline,
|
|
int layer_index,
|
|
const char *blend_string,
|
|
GError **error);
|
|
|
|
#define cogl_pipeline_set_layer_combine_constant \
|
|
cogl_pipeline_set_layer_combine_constant_EXP
|
|
/**
|
|
* cogl_pipeline_set_layer_combine_constant:
|
|
* @pipeline: A #CoglPipeline object
|
|
* @layer_index: Specifies the layer you want to specify a constant used
|
|
* for texture combining
|
|
* @constant: The constant color you want
|
|
*
|
|
* When you are using the 'CONSTANT' color source in a layer combine
|
|
* description then you can use this function to define its value.
|
|
*
|
|
* Since: 2.0
|
|
*/
|
|
void
|
|
cogl_pipeline_set_layer_combine_constant (CoglPipeline *pipeline,
|
|
int layer_index,
|
|
const CoglColor *constant);
|
|
|
|
#define cogl_pipeline_set_layer_matrix cogl_pipeline_set_layer_matrix_EXP
|
|
/**
|
|
* cogl_pipeline_set_layer_matrix:
|
|
* @pipeline: A #CoglPipeline object
|
|
* @layer_index: the index for the layer inside @pipeline
|
|
* @matrix: the transformation matrix for the layer
|
|
*
|
|
* This function lets you set a matrix that can be used to e.g. translate
|
|
* and rotate a single layer of a pipeline used to fill your geometry.
|
|
*/
|
|
void
|
|
cogl_pipeline_set_layer_matrix (CoglPipeline *pipeline,
|
|
int layer_index,
|
|
const CoglMatrix *matrix);
|
|
|
|
#define cogl_pipeline_get_n_layers cogl_pipeline_get_n_layers_EXP
|
|
/**
|
|
* cogl_pipeline_get_n_layers:
|
|
* @pipeline: A #CoglPipeline object
|
|
*
|
|
* Retrieves the number of layers defined for the given @pipeline
|
|
*
|
|
* Return value: the number of layers
|
|
*
|
|
* Since: 2.0
|
|
*/
|
|
int
|
|
cogl_pipeline_get_n_layers (CoglPipeline *pipeline);
|
|
|
|
#define cogl_pipeline_set_layer_filters cogl_pipeline_set_layer_filters_EXP
|
|
/**
|
|
* cogl_pipeline_set_layer_filters:
|
|
* @pipeline: A #CoglPipeline object
|
|
* @layer_index: the layer number to change.
|
|
* @min_filter: the filter used when scaling a texture down.
|
|
* @mag_filter: the filter used when magnifying a texture.
|
|
*
|
|
* Changes the decimation and interpolation filters used when a texture is
|
|
* drawn at other scales than 100%.
|
|
*/
|
|
void
|
|
cogl_pipeline_set_layer_filters (CoglPipeline *pipeline,
|
|
int layer_index,
|
|
CoglPipelineFilter min_filter,
|
|
CoglPipelineFilter mag_filter);
|
|
|
|
#define cogl_pipeline_set_layer_point_sprite_coords_enabled \
|
|
cogl_pipeline_set_layer_point_sprite_coords_enabled_EXP
|
|
/**
|
|
* cogl_pipeline_set_layer_point_sprite_coords_enabled:
|
|
* @pipeline: a #CoglHandle to a pipeline.
|
|
* @layer_index: the layer number to change.
|
|
* @enable: whether to enable point sprite coord generation.
|
|
* @error: A return location for a GError, or NULL to ignore errors.
|
|
*
|
|
* When rendering points, if @enable is %TRUE then the texture
|
|
* coordinates for this layer will be replaced with coordinates that
|
|
* vary from 0.0 to 1.0 across the primitive. The top left of the
|
|
* point will have the coordinates 0.0,0.0 and the bottom right will
|
|
* have 1.0,1.0. If @enable is %FALSE then the coordinates will be
|
|
* fixed for the entire point.
|
|
*
|
|
* This function will only work if %COGL_FEATURE_POINT_SPRITE is
|
|
* available. If the feature is not available then the function will
|
|
* return %FALSE and set @error.
|
|
*
|
|
* Return value: %TRUE if the function succeeds, %FALSE otherwise.
|
|
* Since: 2.0
|
|
*/
|
|
gboolean
|
|
cogl_pipeline_set_layer_point_sprite_coords_enabled (CoglPipeline *pipeline,
|
|
int layer_index,
|
|
gboolean enable,
|
|
GError **error);
|
|
|
|
#define cogl_pipeline_get_layer_point_sprite_coords_enabled \
|
|
cogl_pipeline_get_layer_point_sprite_coords_enabled_EXP
|
|
/**
|
|
* cogl_pipeline_get_layer_point_sprite_coords_enabled:
|
|
* @pipeline: a #CoglHandle to a pipeline.
|
|
* @layer_index: the layer number to check.
|
|
*
|
|
* Gets whether point sprite coordinate generation is enabled for this
|
|
* texture layer.
|
|
*
|
|
* Return value: whether the texture coordinates will be replaced with
|
|
* point sprite coordinates.
|
|
*
|
|
* Since: 2.0
|
|
*/
|
|
gboolean
|
|
cogl_pipeline_get_layer_point_sprite_coords_enabled (CoglPipeline *pipeline,
|
|
int layer_index);
|
|
|
|
#define cogl_pipeline_get_layer_wrap_mode_s \
|
|
cogl_pipeline_get_layer_wrap_mode_s_EXP
|
|
/**
|
|
* cogl_pipeline_get_layer_wrap_mode_s:
|
|
* @pipeline: A #CoglPipeline object
|
|
* @layer_index: the layer number to change.
|
|
*
|
|
* Returns the wrap mode for the 's' coordinate of texture lookups on this
|
|
* layer.
|
|
*
|
|
* Return value: the wrap mode for the 's' coordinate of texture lookups on
|
|
* this layer.
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
CoglPipelineWrapMode
|
|
cogl_pipeline_get_layer_wrap_mode_s (CoglPipeline *pipeline,
|
|
int layer_index);
|
|
|
|
#define cogl_pipeline_set_layer_wrap_mode_s \
|
|
cogl_pipeline_set_layer_wrap_mode_s_EXP
|
|
/**
|
|
* cogl_pipeline_set_layer_wrap_mode_s:
|
|
* @pipeline: A #CoglPipeline object
|
|
* @layer_index: the layer number to change.
|
|
* @mode: the new wrap mode
|
|
*
|
|
* Sets the wrap mode for the 's' coordinate of texture lookups on this layer.
|
|
*
|
|
* Since: 2.0
|
|
*/
|
|
void
|
|
cogl_pipeline_set_layer_wrap_mode_s (CoglPipeline *pipeline,
|
|
int layer_index,
|
|
CoglPipelineWrapMode mode);
|
|
|
|
#define cogl_pipeline_get_layer_wrap_mode_t \
|
|
cogl_pipeline_get_layer_wrap_mode_t_EXP
|
|
/**
|
|
* cogl_pipeline_get_layer_wrap_mode_t:
|
|
* @pipeline: A #CoglPipeline object
|
|
* @layer_index: the layer number to change.
|
|
*
|
|
* Returns the wrap mode for the 't' coordinate of texture lookups on this
|
|
* layer.
|
|
*
|
|
* Return value: the wrap mode for the 't' coordinate of texture lookups on
|
|
* this layer.
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
CoglPipelineWrapMode
|
|
cogl_pipeline_get_layer_wrap_mode_t (CoglPipeline *pipeline,
|
|
int layer_index);
|
|
|
|
|
|
#define cogl_pipeline_set_layer_wrap_mode_t \
|
|
cogl_pipeline_set_layer_wrap_mode_t_EXP
|
|
/**
|
|
* cogl_pipeline_set_layer_wrap_mode_t:
|
|
* @pipeline: A #CoglPipeline object
|
|
* @layer_index: the layer number to change.
|
|
* @mode: the new wrap mode
|
|
*
|
|
* Sets the wrap mode for the 't' coordinate of texture lookups on this layer.
|
|
*
|
|
* Since: 2.0
|
|
*/
|
|
void
|
|
cogl_pipeline_set_layer_wrap_mode_t (CoglPipeline *pipeline,
|
|
int layer_index,
|
|
CoglPipelineWrapMode mode);
|
|
|
|
#define cogl_pipeline_get_layer_wrap_mode_p \
|
|
cogl_pipeline_get_layer_wrap_mode_p_EXP
|
|
/**
|
|
* cogl_pipeline_get_layer_wrap_mode_p:
|
|
* @pipeline: A #CoglPipeline object
|
|
* @layer_index: the layer number to change.
|
|
*
|
|
* Returns the wrap mode for the 'p' coordinate of texture lookups on this
|
|
* layer.
|
|
*
|
|
* Return value: the wrap mode for the 'p' coordinate of texture lookups on
|
|
* this layer.
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
CoglPipelineWrapMode
|
|
cogl_pipeline_get_layer_wrap_mode_p (CoglPipeline *pipeline,
|
|
int layer_index);
|
|
|
|
#define cogl_pipeline_set_layer_wrap_mode_p \
|
|
cogl_pipeline_set_layer_wrap_mode_p_EXP
|
|
/**
|
|
* cogl_pipeline_set_layer_wrap_mode_p:
|
|
* @pipeline: A #CoglPipeline object
|
|
* @layer_index: the layer number to change.
|
|
* @mode: the new wrap mode
|
|
*
|
|
* Sets the wrap mode for the 'p' coordinate of texture lookups on
|
|
* this layer. 'p' is the third coordinate.
|
|
*
|
|
* Since: 2.0
|
|
*/
|
|
void
|
|
cogl_pipeline_set_layer_wrap_mode_p (CoglPipeline *pipeline,
|
|
int layer_index,
|
|
CoglPipelineWrapMode mode);
|
|
|
|
#define cogl_pipeline_set_layer_wrap_mode \
|
|
cogl_pipeline_set_layer_wrap_mode_EXP
|
|
/**
|
|
* cogl_pipeline_set_layer_wrap_mode:
|
|
* @pipeline: A #CoglPipeline object
|
|
* @layer_index: the layer number to change.
|
|
* @mode: the new wrap mode
|
|
*
|
|
* Sets the wrap mode for all three coordinates of texture lookups on
|
|
* this layer. This is equivalent to calling
|
|
* cogl_pipeline_set_layer_wrap_mode_s(),
|
|
* cogl_pipeline_set_layer_wrap_mode_t() and
|
|
* cogl_pipeline_set_layer_wrap_mode_p() separately.
|
|
*
|
|
* Since: 2.0
|
|
*/
|
|
void
|
|
cogl_pipeline_set_layer_wrap_mode (CoglPipeline *pipeline,
|
|
int layer_index,
|
|
CoglPipelineWrapMode mode);
|
|
|
|
#define cogl_pipeline_add_layer_snippet cogl_pipeline_add_layer_snippet_EXP
|
|
/**
|
|
* cogl_pipeline_add_layer_snippet:
|
|
* @pipeline: A #CoglPipeline
|
|
* @layer: The layer to hook the snippet to
|
|
* @snippet: A #CoglSnippet
|
|
*
|
|
* Adds a shader snippet that will hook on to the given layer of the
|
|
* pipeline. The exact part of the pipeline that the snippet wraps
|
|
* around depends on the hook that is given to
|
|
* cogl_snippet_new(). Note that some hooks can't be used with a layer
|
|
* and need to be added with cogl_pipeline_add_snippet() instead.
|
|
*
|
|
* Since: 1.10
|
|
* Stability: Unstable
|
|
*/
|
|
void
|
|
cogl_pipeline_add_layer_snippet (CoglPipeline *pipeline,
|
|
int layer,
|
|
CoglSnippet *snippet);
|
|
|
|
#endif /* COGL_ENABLE_EXPERIMENTAL_API */
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __COGL_PIPELINE_LAYER_STATE_H__ */
|