Opengl Renderer implementation. More...

#include <ember_gl.h>

Inheritance diagram for OpenglRenderer:

Public Member Functions
	OpenglRenderer ()

	~OpenglRenderer () override

void	setup_shaders (Shader default_shader, Shader framebuffer_shader)

void	initialize () override
	Initialize the renderer and its resources. More...

void	resize_viewport (int view_width, int view_height) override
	Resize the rendering context. More...

void	set_context (const void *ctx) override
	Set the platform-specific rendering context. More...

void *	get_context () override
	Get the platform-specific rendering context. More...

void	destroy () override
	Destroy rendering resources. More...

std::shared_ptr< Texture >	load_texture (const std::string &file_path) override
	Load a texture from disk. More...

std::shared_ptr< Texture >	get_texture (const std::string &path) override
	Get a previously loaded texture. More...

bool	load_font (const std::string &file_path, const std::string &font_alias, int font_size) override
	Load a font. More...

void	set_default_font (const std::string &font_name) override
	Set the current font to use for rendering. More...

void	unload_font (const Font &font) override
	Unload a loaded font. More...

void	unload_texture (Uint32 id) override
	Unload a texture by its ID. More...

void	draw_texture (const Texture *texture, const Rect2 &dest_rect, float rotation, const glm::vec4 &color, const Rect2 &src_rect, int z_index, bool flip_h, bool flip_v, const UberShader &uber_shader) override
	Draw a textured quad. More...

void	draw_rect (Rect2 rect, float rotation, const glm::vec4 &color, bool filled, int z_index) override
	Draw a rectangle (filled or outlined). More...

void	draw_text (const std::string &text, float x, float y, float rotation, float scale, const glm::vec4 &color, const std::string &font_alias, int z_index, const UberShader &uber_shader, int ft_size) override
	Draw text to screen. More...

void	draw_line (float x1, float y1, float x2, float y2, float width, float rotation, const glm::vec4 &color, int z_index) override
	Draw a line. More...

void	draw_triangle (float x1, float y1, float x2, float y2, float x3, float y3, float rotation, const glm::vec4 &color, bool filled, int z_index) override
	Draw a triangle. More...

void	draw_circle (float center_x, float center_y, float rotation, float radius, const glm::vec4 &color, bool filled, int segments, int z_index) override
	Draw a circle. More...

void	draw_polygon (const std::vector< glm::vec2 > &points, float rotation, const glm::vec4 &color, bool filled, int z_index) override
	Draw a polygon. More...

void	flush () override
	Submit all batched draw calls. More...

void	present () override
	Swap buffers to present the rendered frame. More...

void	clear (glm::vec4 color) override
	Clear the screen to the given color. More...

Uint32	get_framebuffer_texture () const override

Public Member Functions inherited from Renderer
virtual	~Renderer ()=default

void	set_view_matrix (const glm::mat4 &view_matrix=glm::mat4(1.f))

glm::mat4	get_view_matrix () const

virtual HashMap< std::string, std::shared_ptr< Texture > > &	get_loaded_textures ()

virtual std::vector< std::string > &	get_loaded_fonts_name ()

Additional Inherited Members
Public Attributes inherited from Renderer
int	Viewport [2] = {800, 600}
	Viewport size. More...

SDL_Window *	Window = nullptr
	SDL Window. More...

Backend	Type = Backend::GL_COMPATIBILITY
	Default Type of renderer. More...

Protected Member Functions inherited from Renderer
glm::vec2	rotate_point (const glm::vec2 &point, const glm::vec2 &center, float radians)
	Rotate a point around a center point. More...

Recti	calc_display ()
	Calculate the display rectangle for rendering based on the viewport and window size. More...

void	submit (const BatchKey &key, float x, float y, float w, float h, float u0, float v0, float u1, float v1, const glm::vec4 &color, float rotation=0.0f, bool is_filled=true)
	Add a quad (textured or untextured) to the appropriate batch. More...

Protected Attributes inherited from Renderer
HashMap< BatchKey, Batch >	_batches
	All batches by key. More...

FT_Library	_ft = {}
	FreeType library instance. More...

HashMap< std::string, Font >	fonts
	Loaded fonts. More...

std::string	current_font_name
	Currently selected font alias. More...

glm::mat4	_projection = glm::mat4(1.f)
	Projection matrix. More...

glm::mat4	_view = glm::mat4(1.f)
	View matrix. More...

HashMap< std::string, std::shared_ptr< Texture > >	_textures
	Cached textures. More...

HashMap< Uint32, glm::vec2 >	_texture_sizes
	HACK_FIX: Cached texture sizes by ID. More...

Detailed Description

Opengl Renderer implementation.

Opengl 3.3
Opengl ES 3.0

Constructor & Destructor Documentation

◆ OpenglRenderer()

OpenglRenderer::OpenglRenderer ( )

◆ ~OpenglRenderer()

OpenglRenderer::~OpenglRenderer ( )

overridedefault

Member Function Documentation

◆ clear()

void OpenglRenderer::clear ( glm::vec4 color )

overridevirtual

Clear the screen to the given color.

Parameters

color Color to clear the screen with (default is black).

Implements Renderer.

◆ destroy()

void OpenglRenderer::destroy ( )

overridevirtual

Destroy rendering resources.

Implements Renderer.

◆ draw_circle()

void OpenglRenderer::draw_circle	(	float	center_x,
		float	center_y,
		float	rotation,
		float	radius,
		const glm::vec4 &	color,
		bool	filled,
		int	segments,
		int	z_index
	)

overridevirtual

Draw a circle.

Implements Renderer.

◆ draw_line()

void OpenglRenderer::draw_line	(	float	x1,
		float	y1,
		float	x2,
		float	y2,
		float	thickness,
		float	rotation,
		const glm::vec4 &	color,
		int	z_index
	)

overridevirtual

Draw a line.

Implements Renderer.

◆ draw_polygon()

void OpenglRenderer::draw_polygon	(	const std::vector< glm::vec2 > &	points,
		float	rotation,
		const glm::vec4 &	color,
		bool	filled,
		int	z_index
	)

overridevirtual

Draw a polygon.

Implements Renderer.

◆ draw_rect()

void OpenglRenderer::draw_rect	(	Rect2	rect,
		float	rotation,
		const glm::vec4 &	color,
		bool	filled,
		int	z_index
	)

overridevirtual

Draw a rectangle (filled or outlined).

Implements Renderer.

◆ draw_text()

void OpenglRenderer::draw_text	(	const std::string &	text,
		float	x,
		float	y,
		float	rotation,
		float	scale,
		const glm::vec4 &	color,
		const std::string &	font_alias,
		int	z_index,
		const UberShader &	uber_shader,
		int	ft_size
	)

overridevirtual

Draw text to screen.

Implements Renderer.

◆ draw_texture()

void OpenglRenderer::draw_texture	(	const Texture *	texture,
		const Rect2 &	dest_rect,
		float	rotation,
		const glm::vec4 &	color,
		const Rect2 &	src_rect,
		int	z_index,
		bool	flip_h,
		bool	flip_v,
		const UberShader &	uber_shader
	)

overridevirtual

Draw a textured quad.

Implements Renderer.

◆ draw_triangle()

void OpenglRenderer::draw_triangle	(	float	x1,
		float	y1,
		float	x2,
		float	y2,
		float	x3,
		float	y3,
		float	rotation,
		const glm::vec4 &	color,
		bool	filled,
		int	z_index
	)

overridevirtual

Draw a triangle.

Implements Renderer.

◆ flush()

void OpenglRenderer::flush ( )

overridevirtual

Submit all batched draw calls.

Implements Renderer.

◆ get_context()

void * OpenglRenderer::get_context ( )

overridevirtual

Get the platform-specific rendering context.

Implements Renderer.

◆ get_framebuffer_texture()

Uint32 OpenglRenderer::get_framebuffer_texture ( ) const

inlineoverridevirtual

Reimplemented from Renderer.

◆ get_texture()

std::shared_ptr< Texture > OpenglRenderer::get_texture ( const std::string & path )

overridevirtual

Get a previously loaded texture.

Parameters

path	Path or alias of the texture.

Returns: Reference to the Texture.

Implements Renderer.

◆ initialize()

void OpenglRenderer::initialize ( )

overridevirtual

Initialize the renderer and its resources.

Implements Renderer.

◆ load_font()

bool OpenglRenderer::load_font	(	const std::string &	font_path,
		const std::string &	font_alias,
		int	font_size
	)

overridevirtual

Load a font.

Parameters

font_path	Path to TTF file.
font_alias	Alias name to refer to this font.
font_size	Size of font in pixels.

Returns: true if loaded successfully.

Implements Renderer.

◆ load_texture()

std::shared_ptr< Texture > OpenglRenderer::load_texture ( const std::string & path )

overridevirtual

Load a texture from disk.

Parameters

path	Path to image file.

Returns: Reference to the loaded Texture.

Implements Renderer.

◆ present()

void OpenglRenderer::present ( )

overridevirtual

Swap buffers to present the rendered frame.

This function is called to display the rendered content on the screen.

Implements Renderer.

◆ resize_viewport()

void OpenglRenderer::resize_viewport	(	int	view_width,
		int	view_height
	)

overridevirtual

Resize the rendering context.

Parameters

view_width	Width of the view.
view_height	Height of the view.

Implements Renderer.

◆ set_context()

void OpenglRenderer::set_context ( const void * ctx )

overridevirtual

Set the platform-specific rendering context.

Implements Renderer.

◆ set_default_font()

void OpenglRenderer::set_default_font ( const std::string & font_name )

overridevirtual

Set the current font to use for rendering.

Parameters

font_name Alias of the font to use.

Implements Renderer.

◆ setup_shaders()

void OpenglRenderer::setup_shaders	(	Shader *	default_shader,
		Shader *	framebuffer_shader
	)

◆ unload_font()

void OpenglRenderer::unload_font ( const Font & font )

overridevirtual

Unload a loaded font.

Implements Renderer.

◆ unload_texture()

void OpenglRenderer::unload_texture ( Uint32 id )

overridevirtual

Unload a texture by its ID.

Implements Renderer.

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

engine/public/core/renderer/opengl/ember_gl.h
engine/private/core/renderer/opengl/ember_gl.cpp

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ OpenglRenderer()

◆ ~OpenglRenderer()

Member Function Documentation

◆ clear()

◆ destroy()

◆ draw_circle()

◆ draw_line()

◆ draw_polygon()

◆ draw_rect()

◆ draw_text()

◆ draw_texture()

◆ draw_triangle()

◆ flush()

◆ get_context()

◆ get_framebuffer_texture()

◆ get_texture()

◆ initialize()

◆ load_font()

◆ load_texture()

◆ present()

◆ resize_viewport()

◆ set_context()

◆ set_default_font()

◆ setup_shaders()

◆ unload_font()

◆ unload_texture()