mir::examples::DemoRenderer Class Reference

#include <demo_renderer.h>

Inheritance diagram for mir::examples::DemoRenderer:

Public Member Functions
	DemoRenderer (geometry::Rectangle const &display_area)
	~DemoRenderer ()
void	begin () const override
void	tessellate (std::vector< Primitive > &primitives, graphics::Renderable const &renderable, geometry::Size const &buf_size) const override
	tessellate defines the list of triangles that will be used to render the surface. More...
void	tessellate_shadow (std::vector< Primitive > &primitives, graphics::Renderable const &renderable, float radius) const
void	tessellate_frame (std::vector< Primitive > &primitives, graphics::Renderable const &renderable, float titlebar_height) const
Public Member Functions inherited from mir::compositor::GLRenderer
	GLRenderer (geometry::Rectangle const &display_area)
virtual	~GLRenderer () noexcept
void	set_viewport (geometry::Rectangle const &rect) override
void	set_rotation (float degrees) override
void	begin () const override
void	render (graphics::Renderable const &renderable, graphics::Buffer &buffer) const override
void	end () const override
void	suspend () override
virtual GLuint	load_texture (graphics::Renderable const &renderable, graphics::Buffer &buffer) const
	Load the texture for a surface any which way you like. More...
Public Member Functions inherited from mir::compositor::Renderer
virtual	~Renderer ()=default

Additional Inherited Members
Protected Member Functions inherited from mir::compositor::Renderer
	Renderer ()=default
	Renderer (const Renderer &)=delete
Renderer &	operator= (const Renderer &)=delete

Constructor & Destructor Documentation

DemoRenderer::DemoRenderer

(

geometry::Rectangle const &

display_area

)

DemoRenderer::~DemoRenderer

(

)

Member Function Documentation

void DemoRenderer::begin ( ) const

overridevirtual

Implements mir::compositor::Renderer.

void DemoRenderer::tessellate ( std::vector< Primitive > &  primitives, graphics::Renderable const &  renderable, geometry::Size const &  buf_size  ) const

overridevirtual

tessellate defines the list of triangles that will be used to render the surface.

By default it just returns 4 vertices for a rectangle. However you can override its behaviour to tessellate more finely and deform freely for effects like wobbly windows.

Parameters

[in,out]	primitives	The list of rendering primitives to be grown and/or modified.
[in]	renderable	The renderable surface being tessellated.
[in]	buf_size	The dimensions of the buffer being rendered, which can be particularly useful in calculating texcoords for a surface being actively resized (as the buf_size doesn't yet match renderable.size()).

Note

The cohesion of this function to GLRenderer is quite loose and it does not strictly need to reside here. However it seems a good choice under GLRenderer while this remains the only OpenGL-specific class in the display server, and tessellation is very much OpenGL-specific.

Reimplemented from mir::compositor::GLRenderer.

void DemoRenderer::tessellate_frame	(	std::vector< Primitive > &	primitives,
		graphics::Renderable const &	renderable,
		float	titlebar_height
	)		const

void DemoRenderer::tessellate_shadow	(	std::vector< Primitive > &	primitives,
		graphics::Renderable const &	renderable,
		float	radius
	)		const

---

The documentation for this class was generated from the following files:

• examples/demo-shell/demo_renderer.h
• examples/demo-shell/demo_renderer.cpp