Shaders: link to the bind*Buffer() functions from UBO usage docs.

With skinning the TransformationUniform*D structure will be reused for
two different UBOs and referencing it without the corresponding
bind*Buffer() API would be confusing. So just do that for all.

src/Magnum/Shaders/DistanceFieldVectorGL.h

@@ -88,12 +88,15 @@ See @ref shaders-usage-ubo for a high-level overview that applies to all
 shaders. In this particular case, because the shader doesn't need a separate
 projection and transformation matrix, a combined one is supplied via a
 @ref TransformationProjectionUniform2D / @ref TransformationProjectionUniform3D
-buffer. To maximize use of the limited uniform buffer memory, materials are
-supplied separately in a @ref DistanceFieldVectorMaterialUniform buffer and
-then referenced via @relativeref{DistanceFieldVectorDrawUniform,materialId}
-from a @ref DistanceFieldVectorDrawUniform; for optional texture transformation
-a per-draw @ref TextureTransformationUniform can be supplied as well. A uniform
-buffer setup equivalent to the above would look like this:
+buffer bound with @ref bindTransformationProjectionBuffer(). To maximize use of
+the limited uniform buffer memory, materials are supplied separately in a
+@ref DistanceFieldVectorMaterialUniform buffer bound with
+@ref bindMaterialBuffer() and then referenced via
+@relativeref{DistanceFieldVectorDrawUniform,materialId} from a
+@ref DistanceFieldVectorDrawUniform bound with @ref bindDrawBuffer(); for
+optional texture transformation a per-draw @ref TextureTransformationUniform
+buffer bound with @ref bindTextureTransformationBuffer() can be supplied as
+well. A uniform buffer setup equivalent to the above would look like this:
 
 @snippet MagnumShaders-gl.cpp DistanceFieldVectorGL-ubo
 

src/Magnum/Shaders/FlatGL.h

@@ -170,12 +170,15 @@ See @ref shaders-usage-ubo for a high-level overview that applies to all
 shaders. In this particular case, because the shader doesn't need a separate
 projection and transformation matrix, a combined one is supplied via a
 @ref TransformationProjectionUniform2D / @ref TransformationProjectionUniform3D
-buffer. To maximize use of the limited uniform buffer memory, materials are
-supplied separately in a @ref FlatMaterialUniform buffer and then referenced
-via @relativeref{FlatDrawUniform,materialId} from a @ref FlatDrawUniform; for
-optional texture transformation a per-draw @ref TextureTransformationUniform
-can be supplied as well. A uniform buffer setup equivalent to the
-@ref Shaders-FlatGL-colored "colored case at the top" would look like this:
+buffer bound with @ref bindTransformationProjectionBuffer(). To maximize use of
+the limited uniform buffer memory, materials are supplied separately in a
+@ref FlatMaterialUniform buffer bound with @ref bindMaterialBuffer() and then
+referenced via @relativeref{FlatDrawUniform,materialId} from a
+@ref FlatDrawUniform bound with @ref bindDrawBuffer(); for optional texture
+transformation a per-draw @ref TextureTransformationUniform buffer bound with
+@ref bindTextureTransformationBuffer() can be supplied as well. A uniform
+buffer setup equivalent to
+the @ref Shaders-FlatGL-colored "colored case at the top" would look like this:
 
 @snippet MagnumShaders-gl.cpp FlatGL-ubo
 

src/Magnum/Shaders/MeshVisualizerGL.h

@@ -177,6 +177,15 @@ texture offset (or offset and layer).
     in OpenGL ES 2.0.
 @requires_webgl20 Extension @webgl_extension{ANGLE,instanced_arrays} in WebGL
     1.0.
+
+@section Shaders-MeshVisualizerGL2D-ubo Uniform buffers
+
+Unlike with @ref Shaders-MeshVisualizerGL2D-ubo "uniform buffers in the 3D variant",
+because the shader doesn't need a separate projection and transformation
+matrix, a combined one is supplied via a @ref TransformationProjectionUniform2D
+buffer bound with @ref bindTransformationProjectionBuffer(), and
+a trimmed-down @ref MeshVisualizerDrawUniform2D is used instead of
+@ref MeshVisualizerDrawUniform3D. The rest is the same.
 */
 class MAGNUM_SHADERS_EXPORT MeshVisualizerGL2D: public Implementation::MeshVisualizerGLBase {
     public:
@@ -1192,11 +1201,16 @@ texture offset (or offset and layer).
 
 See @ref shaders-usage-ubo for a high-level overview that applies to all
 shaders. In this particular case, the shader needs a separate
-@ref ProjectionUniform3D and @ref TransformationUniform3D buffer. To maximize
-use of the limited uniform buffer memory, materials are supplied separately in
-a @ref MeshVisualizerMaterialUniform and then referenced via
+@ref ProjectionUniform3D and @ref TransformationUniform3D buffer bound with
+@ref bindProjectionBuffer() and @ref bindTransformationBuffer(), respectively.
+To maximize use of the limited uniform buffer memory, materials are supplied
+separately in a @ref MeshVisualizerMaterialUniform buffer bound with
+@ref bindMaterialBuffer() and then referenced via
 @relativeref{MeshVisualizerDrawUniform3D,materialId} from a
-@ref MeshVisualizerDrawUniform3D. A uniform buffer setup equivalent to the
+@ref MeshVisualizerDrawUniform3D buffer bound with @ref bindDrawBuffer(); for optional texture transformation a per-draw
+@ref TextureTransformationUniform buffer bound with
+@ref bindTextureTransformationBuffer() can be supplied as well. A uniform
+buffer setup equivalent to the
 @ref Shaders-MeshVisualizerGL3D-wireframe "wireframe case at the top" would
 look like this --- note that @ref setViewportSize() is an immediate uniform
 here as well, as it's assumed to be set globally and rarely changed:

src/Magnum/Shaders/PhongGL.h

@@ -259,14 +259,19 @@ well to ensure lighting works:
 
 See @ref shaders-usage-ubo for a high-level overview that applies to all
 shaders. In this particular case, the shader needs a separate
-@ref ProjectionUniform3D and @ref TransformationUniform3D buffer, lights are
-supplied via a @ref PhongLightUniform. To maximize use of the limited uniform
-buffer memory, materials are supplied separately in a @ref PhongMaterialUniform
-buffer and then referenced via @relativeref{PhongDrawUniform,materialId} from a
-@ref PhongDrawUniform; for optional texture transformation a per-draw
-@ref TextureTransformationUniform can be supplied as well. A uniform buffer
-setup equivalent to the @ref Shaders-PhongGL-colored "colored case at the top",
-with one default light, would look like this:
+@ref ProjectionUniform3D and @ref TransformationUniform3D buffer bound with
+@ref bindProjectionBuffer() and @ref bindTransformationBuffer(), respectively,
+lights are supplied via a @ref PhongLightUniform buffer bound with
+@ref bindLightBuffer(). To maximize use of the limited uniform buffer memory,
+materials are supplied separately in a @ref PhongMaterialUniform buffer
+bound with @ref bindMaterialBuffer() and then referenced via
+@relativeref{PhongDrawUniform,materialId} from a @ref PhongDrawUniform bound
+with @ref bindDrawBuffer(); for optional texture transformation a per-draw
+@ref TextureTransformationUniform buffer bound with
+@ref bindTextureTransformationBuffer() can be supplied as well. A uniform
+buffer setup equivalent to the
+@ref Shaders-PhongGL-colored "colored case at the top", with one default light,
+would look like this:
 
 @snippet MagnumShaders-gl.cpp PhongGL-ubo
 

src/Magnum/Shaders/VectorGL.h

@@ -86,12 +86,14 @@ See @ref shaders-usage-ubo for a high-level overview that applies to all
 shaders. In this particular case, because the shader doesn't need a separate
 projection and transformation matrix, a combined one is supplied via a
 @ref TransformationProjectionUniform2D / @ref TransformationProjectionUniform3D
-buffer. To maximize use of the limited uniform buffer memory, materials are
-supplied separately in a @ref VectorMaterialUniform buffer and then referenced
-via @relativeref{VectorDrawUniform,materialId} from a @ref VectorDrawUniform;
-for optional texture transformation a per-draw
-@ref TextureTransformationUniform can be supplied as well. A uniform buffer
-setup equivalent to the above would look like this:
+buffer bound with @ref bindTransformationProjectionBuffer(). To maximize use of
+the limited uniform buffer memory, materials are supplied separately in a
+@ref VectorMaterialUniform buffer bound with @ref bindMaterialBuffer() and then
+referenced via @relativeref{VectorDrawUniform,materialId} from a
+@ref VectorDrawUniform buffer bound with @ref bindDrawBuffer(); for optional
+texture transformation a per-draw @ref TextureTransformationUniform buffer
+bound with @ref bindTextureTransformationBuffer() can be supplied as well. A
+uniform buffer setup equivalent to the above would look like this:
 
 @snippet MagnumShaders-gl.cpp VectorGL-ubo
 

src/Magnum/Shaders/VertexColorGL.h

@@ -87,9 +87,9 @@ See @ref shaders-usage-ubo for a high-level overview that applies to all
 shaders. In this particular case, because the shader doesn't need a separate
 projection and transformation matrix, a combined one is supplied via a
 @ref TransformationProjectionUniform2D / @ref TransformationProjectionUniform3D
-buffer. This is also the only buffer supplied, as there are no other draw
-parameters. A uniform buffer setup equivalent to the above would look like
-this:
+buffer bound with @ref bindTransformationProjectionBuffer(). This is also the
+only buffer supplied, as there are no other draw parameters. A uniform buffer
+setup equivalent to the above would look like this:
 
 @snippet MagnumShaders-gl.cpp VectorGL-ubo