Style cleanup of gpu rst file.

1 files changed, 316 insertions, 314 deletions

diff --git a/doc/python_api/rst/gpu.rst b/doc/python_api/rst/gpu.rst
index 2400e0476b3..68dc30b6143 100644
--- a/doc/python_api/rst/gpu.rst
+++ b/doc/python_api/rst/gpu.rst
@@ -1,13 +1,14 @@
+*******************
 GPU functions (gpu)
-===================
+*******************
 
 .. module:: gpu
 
 This module provides access to materials GLSL shaders.
 
-*****
+
 Intro
-*****
+=====
 
 Module to provide functions concerning the GPU implementation in Blender, in particular
 the GLSL shaders that blender generates automatically to render materials in the 3D view
@@ -15,16 +16,15 @@ and in the game engine.
 
 .. warning::
 
-    The API provided by this module should be consider unstable. The data exposed by the API 
-    are are closely related to Blender's internal GLSL code and may change if the GLSL code 
-    is modified (e.g. new uniform type). 
+   The API provided by this module should be consider unstable. The data exposed by the API
+   are are closely related to Blender's internal GLSL code and may change if the GLSL code
+   is modified (e.g. new uniform type).
 
 
-*********
 Constants
-*********
+=========
+
 
---------------
 GLSL data type
 --------------
 
@@ -59,15 +59,15 @@ See export_shader_
 .. data:: GPU_DATA_3F
 
    three floats
-   
+
    :value: 4
-   
+
 .. data:: GPU_DATA_4F
 
    four floats
-   
+
    :value: 5
-   
+
 .. data:: GPU_DATA_9F
 
    matrix 3x3 in column-major order
@@ -86,448 +86,450 @@ See export_shader_
 
    :value: 8
 
------------------
+
 GLSL uniform type
 -----------------
 
 .. _uniform-type:
 
-Constants that specify the type of uniform used in a GLSL shader. 
+Constants that specify the type of uniform used in a GLSL shader.
 The uniform type determines the data type, origin and method
-of calculation used by Blender to compute the uniform value. 
+of calculation used by Blender to compute the uniform value.
 
 The calculation of some of the uniforms is based on matrices available in the scene:
 
-    .. _mat4_cam_to_world:
-    .. _mat4_world_to_cam:
-
-    *mat4_cam_to_world*
-      Model matrix of the camera. OpenGL 4x4 matrix that converts 
-      camera local coordinates to world coordinates. In blender this is obtained from the
-      'matrix_world' attribute of the camera object.
-
-      Some uniform will need the *mat4_world_to_cam*
-      matrix computed as the inverse of this matrix.
-
-    .. _mat4_object_to_world:
-    .. _mat4_world_to_object:
-
-    *mat4_object_to_world*
-      Model matrix of the object that is being rendered. OpenGL 4x4 matric that converts
-      object local coordinates to world coordinates. In blender this is obtained from the
-      'matrix_world' attribute of the object.
-  
-      Some uniform will need the *mat4_world_to_object* matrix, computed as the inverse of this matrix.
-  
-    .. _mat4_lamp_to_world:
-    .. _mat4_world_to_lamp:
-
-    *mat4_lamp_to_world*
-      Model matrix of the lamp lighting the object. OpenGL 4x4 matrix that converts lamp
-      local coordinates to world coordinates. In blender this is obtained from the
-      'matrix_world' attribute of the lamp object.
-      
-      Some uniform will need the *mat4_world_to_lamp* matrix
-      computed as the inverse of this matrix.
+   .. _mat4_cam_to_world:
+   .. _mat4_world_to_cam:
+
+   *mat4_cam_to_world*
+     Model matrix of the camera. OpenGL 4x4 matrix that converts
+     camera local coordinates to world coordinates. In blender this is obtained from the
+     'matrix_world' attribute of the camera object.
+
+     Some uniform will need the *mat4_world_to_cam*
+     matrix computed as the inverse of this matrix.
+
+   .. _mat4_object_to_world:
+   .. _mat4_world_to_object:
+
+   *mat4_object_to_world*
+     Model matrix of the object that is being rendered. OpenGL 4x4 matric that converts
+     object local coordinates to world coordinates. In blender this is obtained from the
+     'matrix_world' attribute of the object.
+
+     Some uniform will need the *mat4_world_to_object* matrix, computed as the inverse of this matrix.
+
+   .. _mat4_lamp_to_world:
+   .. _mat4_world_to_lamp:
+
+   *mat4_lamp_to_world*
+     Model matrix of the lamp lighting the object. OpenGL 4x4 matrix that converts lamp
+     local coordinates to world coordinates. In blender this is obtained from the
+     'matrix_world' attribute of the lamp object.
+
+     Some uniform will need the *mat4_world_to_lamp* matrix
+     computed as the inverse of this matrix.
 
 .. data:: GPU_DYNAMIC_OBJECT_VIEWMAT
 
-    The uniform is a 4x4 GL matrix that converts world coordinates to 
-    camera coordinates (see mat4_world_to_cam_). Can be set once per frame.
-    There is at most one uniform of that type per shader.
+   The uniform is a 4x4 GL matrix that converts world coordinates to
+   camera coordinates (see mat4_world_to_cam_). Can be set once per frame.
+   There is at most one uniform of that type per shader.
 
-    :value: 1
+   :value: 1
 
 .. data:: GPU_DYNAMIC_OBJECT_MAT
 
-    The uniform is a 4x4 GL matrix that converts object coordinates 
-    to world coordinates (see mat4_object_to_world_). Must be set before drawing the object.
-    There is at most one uniform of that type per shader.
+   The uniform is a 4x4 GL matrix that converts object coordinates
+   to world coordinates (see mat4_object_to_world_). Must be set before drawing the object.
+   There is at most one uniform of that type per shader.
 
-    :value: 2
+   :value: 2
 
 .. data:: GPU_DYNAMIC_OBJECT_VIEWIMAT
 
-    The uniform is a 4x4 GL matrix that converts coordinates
-    in camera space to world coordinates (see mat4_cam_to_world_).
-    Can be set once per frame. 
-    There is at most one uniform of that type per shader.
+   The uniform is a 4x4 GL matrix that converts coordinates
+   in camera space to world coordinates (see mat4_cam_to_world_).
+   Can be set once per frame.
+   There is at most one uniform of that type per shader.
 
-    :value: 3
+   :value: 3
 
 .. data:: GPU_DYNAMIC_OBJECT_IMAT
 
-    The uniform is a 4x4 GL matrix that converts world coodinates
-    to object coordinates (see mat4_world_to_object_).
-    Must be set before drawing the object.
-    There is at most one uniform of that type per shader.
-   
-    :value: 4
-   
+   The uniform is a 4x4 GL matrix that converts world coodinates
+   to object coordinates (see mat4_world_to_object_).
+   Must be set before drawing the object.
+   There is at most one uniform of that type per shader.
+
+   :value: 4
+
 .. data:: GPU_DYNAMIC_OBJECT_COLOR
 
-    The uniform is a vector of 4 float representing a RGB color + alpha defined at object level.
-    Each values between 0.0 and 1.0. In blender it corresponds to the 'color' attribute of the object.
-    Must be set before drawing the object.
-    There is at most one uniform of that type per shader.
-   
-    :value: 5
-   
+   The uniform is a vector of 4 float representing a RGB color + alpha defined at object level.
+   Each values between 0.0 and 1.0. In blender it corresponds to the 'color' attribute of the object.
+   Must be set before drawing the object.
+   There is at most one uniform of that type per shader.
+
+   :value: 5
+
 .. data:: GPU_DYNAMIC_LAMP_DYNVEC
 
-    The uniform is a vector of 3 float representing the direction of light in camera space.
-    In Blender, this is computed by 
+   The uniform is a vector of 3 float representing the direction of light in camera space.
+   In Blender, this is computed by
+
+   mat4_world_to_cam_ * (-vec3_lamp_Z_axis)
 
-    mat4_world_to_cam_ * (-vec3_lamp_Z_axis) 
+   as the lamp Z axis points to the opposite direction of light.
+   The norm of the vector should be unity. Can be set once per frame.
+   There is one uniform of that type per lamp lighting the material.
 
-    as the lamp Z axis points to the opposite direction of light.
-    The norm of the vector should be unity. Can be set once per frame.
-    There is one uniform of that type per lamp lighting the material.
+   :value: 6
 
-    :value: 6
-   
 .. data:: GPU_DYNAMIC_LAMP_DYNCO
 
-    The uniform is a vector of 3 float representing the position of the light in camera space.
-    Computed as 
-    
-    mat4_world_to_cam_ * vec3_lamp_pos
+   The uniform is a vector of 3 float representing the position of the light in camera space.
+   Computed as
+
+   mat4_world_to_cam_ * vec3_lamp_pos
+
+   Can be set once per frame.
+   There is one uniform of that type per lamp lighting the material.
+
+   :value: 7
 
-    Can be set once per frame.
-    There is one uniform of that type per lamp lighting the material.
-   
-    :value: 7
-   
 .. data:: GPU_DYNAMIC_LAMP_DYNIMAT
 
-    The uniform is a 4x4 GL matrix that converts vector in camera space to lamp space.
-    Computed as 
+   The uniform is a 4x4 GL matrix that converts vector in camera space to lamp space.
+   Computed as
 
-    mat4_world_to_lamp_ * mat4_cam_to_world_
+   mat4_world_to_lamp_ * mat4_cam_to_world_
 
-    Can be set once per frame.
-    There is one uniform of that type per lamp lighting the material.
+   Can be set once per frame.
+   There is one uniform of that type per lamp lighting the material.
 
-    :value: 8
+   :value: 8
 
 .. data:: GPU_DYNAMIC_LAMP_DYNPERSMAT
 
-    The uniform is a 4x4 GL matrix that converts a vector in camera space to shadow buffer depth space.
-    Computed as 
+   The uniform is a 4x4 GL matrix that converts a vector in camera space to shadow buffer depth space.
+   Computed as
 
-    mat4_perspective_to_depth_ * mat4_lamp_to_perspective_ * mat4_world_to_lamp_ * mat4_cam_to_world_.
+   mat4_perspective_to_depth_ * mat4_lamp_to_perspective_ * mat4_world_to_lamp_ * mat4_cam_to_world_.
 
-    .. _mat4_perspective_to_depth:
+   .. _mat4_perspective_to_depth:
 
-    *mat4_perspective_to_depth* is a fixed matrix defined as follow::
+   *mat4_perspective_to_depth* is a fixed matrix defined as follow::
 
-        0.5 0.0 0.0 0.5
-        0.0 0.5 0.0 0.5
-        0.0 0.0 0.5 0.5
-        0.0 0.0 0.0 1.0
+      0.5 0.0 0.0 0.5
+      0.0 0.5 0.0 0.5
+      0.0 0.0 0.5 0.5
+      0.0 0.0 0.0 1.0
 
-    This uniform can be set once per frame. There is one uniform of that type per lamp casting shadow in the scene.
+   This uniform can be set once per frame. There is one uniform of that type per lamp casting shadow in the scene.
 
-    :value: 9
+   :value: 9
 
 .. data:: GPU_DYNAMIC_LAMP_DYNENERGY
 
-    The uniform is a single float representing the lamp energy. In blender it corresponds
-    to the 'energy' attribute of the lamp data block.
-    There is one uniform of that type per lamp lighting the material.
+   The uniform is a single float representing the lamp energy. In blender it corresponds
+   to the 'energy' attribute of the lamp data block.
+   There is one uniform of that type per lamp lighting the material.
 
-    :value: 10
+   :value: 10
 
 .. data:: GPU_DYNAMIC_LAMP_DYNCOL
 
-    The uniform is a vector of 3 float representing the lamp color. 
-    Color elements are between 0.0 and 1.0. In blender it corresponds
-    to the 'color' attribute of the lamp data block.
-    There is one uniform of that type per lamp lighting the material.
+   The uniform is a vector of 3 float representing the lamp color.
+   Color elements are between 0.0 and 1.0. In blender it corresponds
+   to the 'color' attribute of the lamp data block.
+   There is one uniform of that type per lamp lighting the material.
 
-    :value: 11
+   :value: 11
 
 .. data:: GPU_DYNAMIC_SAMPLER_2DBUFFER
 
-    The uniform is an integer representing an internal texture used for certain effect
-    (color band, etc). 
-	
-    :value: 12
+   The uniform is an integer representing an internal texture used for certain effect
+   (color band, etc).
+
+   :value: 12
 
 .. data:: GPU_DYNAMIC_SAMPLER_2DIMAGE
 
-    The uniform is an integer representing a texture loaded from an image file. 
+   The uniform is an integer representing a texture loaded from an image file.
 
-    :value: 13
+   :value: 13
 
 .. data:: GPU_DYNAMIC_SAMPLER_2DSHADOW
 
-    The uniform is an integer representing a shadow buffer corresponding to a lamp
-    casting shadow.
+   The uniform is an integer representing a shadow buffer corresponding to a lamp
+   casting shadow.
+
+   :value: 14
 
-    :value: 14
 
--------------------
 GLSL attribute type
 -------------------
 
 .. _attribute-type:
 
 Type of the vertex attribute used in the GLSL shader. Determines the mesh custom data
-layer that contains the vertex attribute. 
+layer that contains the vertex attribute.
 
 .. data:: CD_MTFACE
 
-    Vertex attribute is a UV Map. Data type is vector of 2 float.
+   Vertex attribute is a UV Map. Data type is vector of 2 float.
 
-    There can be more than one attribute of that type, they are differenciated by name.
-    In blender, you can retrieve the attribute data with:
+   There can be more than one attribute of that type, they are differenciated by name.
+   In blender, you can retrieve the attribute data with:
 
-    .. code-block:: python
+   .. code-block:: python
 
-        mesh.uv_textures[attribute['name']]
+      mesh.uv_textures[attribute["name"]]
 
-    :value: 5
+   :value: 5
 
 .. data:: CD_MCOL
 
-    Vertex attribute is color layer. Data type is vector 4 unsigned byte (RGBA).
+   Vertex attribute is color layer. Data type is vector 4 unsigned byte (RGBA).
 
-    There can be more than one attribute of that type, they are differenciated by name.
-    In blender you can retrieve the attribute data with:
+   There can be more than one attribute of that type, they are differenciated by name.
+   In blender you can retrieve the attribute data with:
 
-    .. code-block:: python
+   .. code-block:: python
 
-        mesh.vertex_colors[attribute['name']]
+      mesh.vertex_colors[attribute["name"]]
 
-    :value: 6
+   :value: 6
 
 .. data:: CD_ORCO
 
-    Vertex attribute is original coordinates. Data type is vector 3 float.
+   Vertex attribute is original coordinates. Data type is vector 3 float.
+
+   There can be only 1 attribute of that type per shader.
+   In blender you can retrieve the attribute data with:
 
-    There can be only 1 attribute of that type per shader.	
-    In blender you can retrieve the attribute data with:
-  
-    .. code-block:: python
+   .. code-block:: python
 
-        mesh.vertices
+      mesh.vertices
 
-    :value: 14
+   :value: 14
 
 .. data:: CD_TANGENT
 
-    Vertex attribute is the tangent vector. Data type is vector 4 float.
+   Vertex attribute is the tangent vector. Data type is vector 4 float.
 
-    There can be only 1 attribute of that type per shader.
-    There is currently no way to retrieve this attribute data via the RNA API but a standalone 
-    C function to compute the tangent layer from the other layers can be obtained from
-    blender.org.
+   There can be only 1 attribute of that type per shader.
+   There is currently no way to retrieve this attribute data via the RNA API but a standalone
+   C function to compute the tangent layer from the other layers can be obtained from
+   blender.org.
+
+   :value: 18
 
-    :value: 18
 
-*********
 Functions
-*********
+=========
 
 .. _export_shader:
 
 .. function:: export_shader(scene,material)
 
-    Extracts the GLSL shader producing the visual effect of material in scene for the purpose of 
-    reusing the shader in an external engine. This function is meant to be used in material exporter 
-    so that the GLSL shader can be exported entirely. The return value is a dictionary containing the
-    shader source code and all associated data. 
+   Extracts the GLSL shader producing the visual effect of material in scene for the purpose of
+   reusing the shader in an external engine. This function is meant to be used in material exporter
+   so that the GLSL shader can be exported entirely. The return value is a dictionary containing the
+   shader source code and all associated data.
 
-    :arg scene: the scene in which the material in rendered.
-    :type scene: :class:`bpy.types.Scene`
-    :arg material: the material that you want to export the GLSL shader
-    :type material: :class:`bpy.types.Material`
-    :return: the shader source code and all associated data in a dictionary
-    :rtype: dictionary
+   :arg scene: the scene in which the material in rendered.
+   :type scene: :class:`bpy.types.Scene`
+   :arg material: the material that you want to export the GLSL shader
+   :type material: :class:`bpy.types.Material`
+   :return: the shader source code and all associated data in a dictionary
+   :rtype: dictionary
 
-    The dictionary contains the following elements:
+   The dictionary contains the following elements:
 
-    * ['fragment'] : string
-        fragment shader source code.
-    
-    * ['vertex'] : string
-        vertex shader source code.
+   * ["fragment"] : string
+      fragment shader source code.
 
-    * ['uniforms'] : sequence
-        list of uniforms used in fragment shader, can be empty list. Each element of the
-        sequence is a dictionary with the following elements:
+   * ["vertex"] : string
+      vertex shader source code.
 
-        * ['varname'] : string
-            name of the uniform in the fragment shader. Always of the form 'unf<number>'.
+   * ["uniforms"] : sequence
+      list of uniforms used in fragment shader, can be empty list. Each element of the
+      sequence is a dictionary with the following elements:
 
-        * ['datatype'] : integer
-            data type of the uniform variable. Can be one of the following:
+      * ["varname"] : string
+         name of the uniform in the fragment shader. Always of the form 'unf<number>'.
 
-            * :data:`gpu.GPU_DATA_1I` : use glUniform1i
-            * :data:`gpu.GPU_DATA_1F` : use glUniform1fv
-            * :data:`gpu.GPU_DATA_2F` : use glUniform2fv
-            * :data:`gpu.GPU_DATA_3F` : use glUniform3fv
-            * :data:`gpu.GPU_DATA_4F` : use glUniform4fv
-            * :data:`gpu.GPU_DATA_9F` : use glUniformMatrix3fv
-            * :data:`gpu.GPU_DATA_16F` : use glUniformMatrix4fv
+      * ["datatype"] : integer
+         data type of the uniform variable. Can be one of the following:
 
-        * ['type'] : integer
-            type of uniform, determines the origin and method of calculation. See uniform-type_.
-            Depending on the type, more elements will be be present.
+         * :data:`gpu.GPU_DATA_1I` : use glUniform1i
+         * :data:`gpu.GPU_DATA_1F` : use glUniform1fv
+         * :data:`gpu.GPU_DATA_2F` : use glUniform2fv
+         * :data:`gpu.GPU_DATA_3F` : use glUniform3fv
+         * :data:`gpu.GPU_DATA_4F` : use glUniform4fv
+         * :data:`gpu.GPU_DATA_9F` : use glUniformMatrix3fv
+         * :data:`gpu.GPU_DATA_16F` : use glUniformMatrix4fv
 
-        * ['lamp'] : :class:`bpy.types.Object`
-            Reference to the lamp object from which the uniforms value are extracted. Set for the following uniforms types:
+      * ["type"] : integer
+         type of uniform, determines the origin and method of calculation. See uniform-type_.
+         Depending on the type, more elements will be be present.
 
-            .. hlist::
-               :columns: 3
+      * ["lamp"] : :class:`bpy.types.Object`
+         Reference to the lamp object from which the uniforms value are extracted. Set for the following uniforms types:
 
-               * :data:`gpu.GPU_DYNAMIC_LAMP_DYNVEC`
-               * :data:`gpu.GPU_DYNAMIC_LAMP_DYNCO`
-               * :data:`gpu.GPU_DYNAMIC_LAMP_DYNIMAT`
-               * :data:`gpu.GPU_DYNAMIC_LAMP_DYNPERSMAT`
-               * :data:`gpu.GPU_DYNAMIC_LAMP_DYNENERGY`
-               * :data:`gpu.GPU_DYNAMIC_LAMP_DYNCOL`
-               * :data:`gpu.GPU_DYNAMIC_SAMPLER_2DSHADOW`
+         .. hlist::
+            :columns: 3
 
-            Notes:
+            * :data:`gpu.GPU_DYNAMIC_LAMP_DYNVEC`
+            * :data:`gpu.GPU_DYNAMIC_LAMP_DYNCO`
+            * :data:`gpu.GPU_DYNAMIC_LAMP_DYNIMAT`
+            * :data:`gpu.GPU_DYNAMIC_LAMP_DYNPERSMAT`
+            * :data:`gpu.GPU_DYNAMIC_LAMP_DYNENERGY`
+            * :data:`gpu.GPU_DYNAMIC_LAMP_DYNCOL`
+            * :data:`gpu.GPU_DYNAMIC_SAMPLER_2DSHADOW`
 
-            * The uniforms :data:`gpu.GPU_DYNAMIC_LAMP_DYNVEC`, :data:`gpu.GPU_DYNAMIC_LAMP_DYNCO`, :data:`gpu.GPU_DYNAMIC_LAMP_DYNIMAT` and :data:`gpu.GPU_DYNAMIC_LAMP_DYNPERSMAT`
-              refer to the lamp object position and orientation, both of can be derived from the object world matrix:
+         Notes:
 
-              .. code-block:: python
+         * The uniforms :data:`gpu.GPU_DYNAMIC_LAMP_DYNVEC`, :data:`gpu.GPU_DYNAMIC_LAMP_DYNCO`, :data:`gpu.GPU_DYNAMIC_LAMP_DYNIMAT` and :data:`gpu.GPU_DYNAMIC_LAMP_DYNPERSMAT`
+            refer to the lamp object position and orientation, both of can be derived from the object world matrix:
 
-                obmat = uniform['lamp'].matrix_world
+            .. code-block:: python
 
-              where obmat is the mat4_lamp_to_world_ matrix of the lamp as a 2 dimensional array,
-              the lamp world location location is in obmat[3].
+               obmat = uniform["lamp"].matrix_world
 
-            * The uniform types :data:`gpu.GPU_DYNAMIC_LAMP_DYNENERGY` and :data:`gpu.GPU_DYNAMIC_LAMP_DYNCOL` refer to the lamp data bloc that you get from:
+            where obmat is the mat4_lamp_to_world_ matrix of the lamp as a 2 dimensional array,
+            the lamp world location location is in obmat[3].
 
-              .. code-block:: python
+         * The uniform types :data:`gpu.GPU_DYNAMIC_LAMP_DYNENERGY` and :data:`gpu.GPU_DYNAMIC_LAMP_DYNCOL` refer to the lamp data bloc that you get from:
 
-                la = uniform['lamp'].data
-          
-              from which you get la.energy and la.color
+            .. code-block:: python
 
-            * Lamp duplication is not supported: if you have duplicated lamps in your scene
-              (i.e. lamp that are instantiated by dupligroup, etc), this element will only 
-              give you a reference to the orignal lamp and you will not know which instance
-              of the lamp it is refering too. You can still handle that case in the exporter
-              by distributing the uniforms amongst the duplicated lamps.
-              
-        * ['image'] : :class:`bpy.types.Image`
-            Reference to the image databloc. Set for uniform type :data:`gpu.GPU_DYNAMIC_SAMPLER_2DIMAGE`. You can get the image data from:
+               la = uniform["lamp"].data
+
+            from which you get la.energy and la.color
+
+         * Lamp duplication is not supported: if you have duplicated lamps in your scene
+            (i.e. lamp that are instantiated by dupligroup, etc), this element will only
+            give you a reference to the orignal lamp and you will not know which instance
+            of the lamp it is refering too. You can still handle that case in the exporter
+            by distributing the uniforms amongst the duplicated lamps.
+
+      * ["image"] : :class:`bpy.types.Image`
+         Reference to the image databloc. Set for uniform type :data:`gpu.GPU_DYNAMIC_SAMPLER_2DIMAGE`. You can get the image data from:
+
+         .. code-block:: python
+
+            # full path to image file
+            uniform["image"].filepath
+            # image size as a 2-dimensional array of int
+            uniform["image"].size
+
+      * ["texnumber"] : integer
+         Channel number to which the texture is bound when drawing the object.
+         Set for uniform types :data:`gpu.GPU_DYNAMIC_SAMPLER_2DBUFFER`, :data:`gpu.GPU_DYNAMIC_SAMPLER_2DIMAGE` and :data:`gpu.GPU_DYNAMIC_SAMPLER_2DSHADOW`.
+
+         This is provided for information only: when reusing the shader outside blencer,
+         you are free to assign the textures to the channel of your choice and to pass
+         that number channel to the GPU in the uniform.
+
+      * ["texpixels"] : byte array
+         texture data for uniform type :data:`gpu.GPU_DYNAMIC_SAMPLER_2DBUFFER`. Although
+         the corresponding uniform is a 2D sampler, the texture is always a 1D texture
+         of n x 1 pixel. The texture size n is provided in ["texsize"] element.
+         These texture are only used for computer generated texture (colorband, etc).
+         The texture data is provided so that you can make a real image out of it in the
+         exporter.
+
+      * ["texsize"] : integer
+         horizontal size of texture for uniform type :data:`gpu.GPU_DYNAMIC_SAMPLER_2DBUFFER`.
+         The texture data is in ["texpixels"].
+
+   * ["attributes"] : sequence
+      list of attributes used in vertex shader, can be empty. Blender doesn't use
+      standard attributes except for vertex position and normal. All other vertex
+      attributes must be passed using the generic glVertexAttrib functions.
+      The attribute data can be found in the derived mesh custom data using RNA.
+      Each element of the sequence is a dictionary containing the following elements:
+
+      * ["varname"] : string
+         name of the uniform in the vertex shader. Always of the form 'att<number>'.
+
+      * ["datatype"] : integer
+         data type of vertex attribute, can be one of the following:
+
+         * :data:`gpu.GPU_DATA_2F` : use glVertexAttrib2fv
+         * :data:`gpu.GPU_DATA_3F` : use glVertexAttrib3fv
+         * :data:`gpu.GPU_DATA_4F` : use glVertexAttrib4fv
+         * :data:`gpu.GPU_DATA_4UB` : use glVertexAttrib4ubv
+
+      * ["number"] : integer
+         generic attribute number. This is provided for information only. Blender
+         doesn't use glBindAttribLocation to place generic attributes at specific location,
+         it lets the shader compiler place the attributes automatically and query the
+         placement with glGetAttribLocation. The result of this placement is returned in
+         this element.
+
+         When using this shader in a render engine, you should either use
+         glBindAttribLocation to force the attribute at this location or use
+         glGetAttribLocation to get the placement chosen by the compiler of your GPU.
+
+      * ["type"] : integer
+         type of the mesh custom data from which the vertex attribute is loaded.
+         See attribute-type_.
+
+      * ["name"] : string or integer
+         custom data layer name, used for attribute type :data:`gpu.CD_MTFACE` and :data:`gpu.CD_MCOL`.
+
+   Example:
+
+   .. code-block:: python
+
+      import gpu
+      # get GLSL shader of material Mat.001 in scene Scene.001
+      scene = bpy.data.scenes["Scene.001"]
+      material = bpy.data.materials["Mat.001"]
+      shader = gpu.export_shader(scene,material)
+      # scan the uniform list and find the images used in the shader
+      for uniform in shader["uniforms"]:
+          if uniform["type"] == gpu.GPU_DYNAMIC_SAMPLER_2DIMAGE:
+              print("uniform {0} is using image {1}".format(uniform["varname"], uniform["image"].filepath))
+      # scan the attribute list and find the UV Map used in the shader
+      for attribute in shader["attributes"]:
+          if attribute["type"] == gpu.CD_MTFACE:
+              print("attribute {0} is using UV Map {1}".format(attribute["varname"], attribute["name"]))
 
-            .. code-block:: python
 
-               # full path to image file
-               uniform['image'].filepath
-               # image size as a 2-dimensional array of int
-               uniform['image'].size
-
-        * ['texnumber'] : integer
-            Channel number to which the texture is bound when drawing the object.
-            Set for uniform types :data:`gpu.GPU_DYNAMIC_SAMPLER_2DBUFFER`, :data:`gpu.GPU_DYNAMIC_SAMPLER_2DIMAGE` and :data:`gpu.GPU_DYNAMIC_SAMPLER_2DSHADOW`.
-
-            This is provided for information only: when reusing the shader outside blencer, 
-            you are free to assign the textures to the channel of your choice and to pass
-            that number channel to the GPU in the uniform.
-
-        * ['texpixels'] : byte array
-            texture data for uniform type :data:`gpu.GPU_DYNAMIC_SAMPLER_2DBUFFER`. Although
-            the corresponding uniform is a 2D sampler, the texture is always a 1D texture
-            of n x 1 pixel. The texture size n is provided in ['texsize'] element. 
-            These texture are only used for computer generated texture (colorband, etc).
-            The texture data is provided so that you can make a real image out of it in the
-            exporter.
-		
-        * ['texsize'] : integer
-            horizontal size of texture for uniform type :data:`gpu.GPU_DYNAMIC_SAMPLER_2DBUFFER`. 
-            The texture data is in ['texpixels'].
-
-    * ['attributes'] : sequence
-        list of attributes used in vertex shader, can be empty. Blender doesn't use
-        standard attributes except for vertex position and normal. All other vertex
-        attributes must be passed using the generic glVertexAttrib functions.
-        The attribute data can be found in the derived mesh custom data using RNA.
-        Each element of the sequence is a dictionary containing the following elements:
-
-        * ['varname'] : string
-            name of the uniform in the vertex shader. Always of the form 'att<number>'.
-
-        * ['datatype'] : integer
-            data type of vertex attribute, can be one of the following:
-
-            * :data:`gpu.GPU_DATA_2F` : use glVertexAttrib2fv
-            * :data:`gpu.GPU_DATA_3F` : use glVertexAttrib3fv
-            * :data:`gpu.GPU_DATA_4F` : use glVertexAttrib4fv
-            * :data:`gpu.GPU_DATA_4UB` : use glVertexAttrib4ubv
-
-        * ['number'] : integer
-            generic attribute number. This is provided for information only. Blender 
-            doesn't use glBindAttribLocation to place generic attributes at specific location,
-            it lets the shader compiler place the attributes automatically and query the 
-            placement with glGetAttribLocation. The result of this placement is returned in 
-            this element. 
-
-            When using this shader in a render engine, you should either use
-            glBindAttribLocation to force the attribute at this location or use 
-            glGetAttribLocation to get the placement chosen by the compiler of your GPU.
-
-        * ['type'] : integer
-            type of the mesh custom data from which the vertex attribute is loaded. 
-            See attribute-type_.
-
-        * ['name'] : string or integer
-            custom data layer name, used for attribute type :data:`gpu.CD_MTFACE` and :data:`gpu.CD_MCOL`.
-
-    Example:
-
-    .. code-block:: python
-
-        import gpu
-        # get GLSL shader of material Mat.001 in scene Scene.001
-        scene = bpy.data.scenes['Scene.001']
-        material = bpy.data.materials['Mat.001']
-        shader = gpu.export_shader(scene,material)
-        # scan the uniform list and find the images used in the shader
-        for uniform in shader['uniforms']:
-            if uniform['type'] == gpu.GPU_DYNAMIC_SAMPLER_2DIMAGE:
-                print("uniform {0} is using image {1}".format(uniform['varname'], uniform['image'].filepath))
-        # scan the attribute list and find the UV Map used in the shader
-        for attribute in shader['attributes']:
-            if attribute['type'] == gpu.CD_MTFACE:
-                print("attribute {0} is using UV Map {1}".format(attribute['varname'], attribute['name']))
-
-*****
 Notes
-*****
+=====
 
 .. _mat4_lamp_to_perspective:
 
 1. Calculation of the *mat4_lamp_to_perspective* matrix for a spot lamp.
 
-   The following pseudo code shows how the *mat4_lamp_to_perspective* matrix is computed 
+   The following pseudo code shows how the *mat4_lamp_to_perspective* matrix is computed
    in blender for uniforms of :data:`gpu.GPU_DYNAMIC_LAMP_DYNPERSMAT` type::
 
-     #Get the lamp datablock with:
-     lamp=bpy.data.objects[uniform['lamp']].data
+   .. code-block:: python
+
+      #Get the lamp datablock with:
+      lamp = bpy.data.objects[uniform["lamp"]].data
 
-     #Compute the projection matrix:
-     #  You will need these lamp attributes:
-     #  lamp.clipsta : near clip plane in world unit
-     #  lamp.clipend : far clip plane in world unit
-     #  lamp.spotsize : angle in degree of the spot light
+      # Compute the projection matrix:
+      #  You will need these lamp attributes:
+      #  lamp.clipsta : near clip plane in world unit
+      #  lamp.clipend : far clip plane in world unit
+      #  lamp.spotsize : angle in degree of the spot light
 
-     #The size of the projection plane is computed with the usual formula:
-     wsize = lamp.clista * tan(lamp.spotsize/2)
+      # The size of the projection plane is computed with the usual formula:
+      wsize = lamp.clista * tan(lamp.spotsize/2)
 
-     #And the projection matrix:
-     mat4_lamp_to_perspective = glFrustum(-wsize,wsize,-wsize,wsize,lamp.clista,lamp.clipend)
+      #And the projection matrix:
+      mat4_lamp_to_perspective = glFrustum(-wsize, wsize, -wsize, wsize, lamp.clista, lamp.clipend)
 
 2. Creation of the shadow map for a spot lamp.
 
    The shadow map is the depth buffer of a render performed by placing the camera at the
-   spot light position. The size of the shadow map is given by the attribute lamp.bufsize : 
+   spot light position. The size of the shadow map is given by the attribute lamp.bufsize :
    shadow map size in pixel, same size in both dimensions.