OpenGLSprite Class Reference

Class that encapsulates a RGBA texture together with a paletted remap texture. More...

#include <opengl.h>

Public Member Functions
	OpenGLSprite (uint width, uint height, uint levels, SpriteColourComponent components)
	Create an OpenGL sprite with a palette remap part. More...
void	Update (uint width, uint height, uint level, const SpriteLoader::CommonPixel *data)
	Update a single mip-map level with new pixel data. More...
Dimension	GetSize (ZoomLevel level) const
	Query the sprite size at a certain zoom level. More...

Private Types
enum	Texture { TEX_RGBA , TEX_REMAP , NUM_TEX }
	Enum of all used OpenGL texture objects. More...

Private Member Functions
bool	BindTextures ()
	Bind textures for rendering this sprite. More...

Static Private Member Functions
static bool	Create ()
	Create all common resources for sprite rendering. More...
static void	Destroy ()
	Free all common resources for sprite rendering.

Private Attributes
Dimension	dim
GLuint	tex [NUM_TEX]
	The texture objects.

Static Private Attributes
static GLuint	dummy_tex [NUM_TEX] = { 0, 0 }
	1x1 dummy textures to substitute for unused sprite components.
static GLuint	pal_identity = 0
	Identity texture mapping.
static GLuint	pal_tex = 0
	Texture for palette remap.
static GLuint	pal_pbo = 0
	Pixel buffer object for remap upload.

Friends
class	OpenGLBackend

Detailed Description

Class that encapsulates a RGBA texture together with a paletted remap texture.

Definition at line 115 of file opengl.h.

Member Enumeration Documentation

Texture

enum OpenGLSprite::Texture

private

Enum of all used OpenGL texture objects.

Enumerator
TEX_RGBA	RGBA texture part.
TEX_REMAP	Remap texture part.

Definition at line 118 of file opengl.h.

Constructor & Destructor Documentation

OpenGLSprite()

OpenGLSprite::OpenGLSprite	(	uint	width,
		uint	height,
		uint	levels,
		SpriteColourComponent	components
	)

Create an OpenGL sprite with a palette remap part.

Parameters

width	Width of the top-level texture.
height	Height of the top-level texture.
levels	Number of mip-map levels.
components	Indicates which sprite components are used.

Definition at line 1415 of file opengl.cpp.

References MemSetT(), SCC_PAL, tex, TEX_REMAP, and TEX_RGBA.

Member Function Documentation

BindTextures()

bool OpenGLSprite::BindTextures ( )

private

Bind textures for rendering this sprite.

Returns

True if the sprite has RGBA data.

Definition at line 1526 of file opengl.cpp.

References tex, TEX_REMAP, and TEX_RGBA.

Create()

bool OpenGLSprite::Create ( )

staticprivate

Create all common resources for sprite rendering.

Returns

True if no error occurred.

Definition at line 1339 of file opengl.cpp.

References dummy_tex, pal_identity, pal_pbo, pal_tex, TEX_REMAP, and TEX_RGBA.

GetSize()

Dimension OpenGLSprite::GetSize ( ZoomLevel  level ) const

inline

Query the sprite size at a certain zoom level.

Parameters

level

The zoom level to query.

Returns

Sprite size at the given zoom level.

Definition at line 1516 of file opengl.cpp.

Update()

void OpenGLSprite::Update	(	uint	width,
		uint	height,
		uint	level,
		const SpriteLoader::CommonPixel *	data
	)

Update a single mip-map level with new pixel data.

Parameters

width	Width of the level.
height	Height of the level.
level	Mip-map level.
data	New pixel data.

Definition at line 1468 of file opengl.cpp.

References Colour::a, SpriteLoader::CommonPixel::a, Align(), ReusableBuffer< T >::Allocate(), SpriteLoader::CommonPixel::b, SpriteLoader::CommonPixel::g, SpriteLoader::CommonPixel::r, tex, TEX_REMAP, and TEX_RGBA.

Referenced by OpenGLBackend::Encode().

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

• src/video/opengl.h
• src/video/opengl.cpp