A simple shader cache class that gives us the correct shader depending on desired configuration. More...

#include <ShaderManager.hpp>

Public Types
enum	ATTLOC { ATTLOC_VERTEX, ATTLOC_NORMAL, ATTLOC_TEXCOORD, ATTLOC_TANGENT, ATTLOC_BITANGENT }
	Enum for OpenGL shader attribute locations. More...

enum	UNIFORM { UNIFORM_MAT_MODELVIEW, UNIFORM_MAT_PROJECTION, UNIFORM_MAT_MVP, UNIFORM_MAT_NORMAL, UNIFORM_MAT_SHADOW0, UNIFORM_MAT_SHADOW1, UNIFORM_MAT_SHADOW2, UNIFORM_MAT_SHADOW3, UNIFORM_MAT_CUBEMVP, UNIFORM_TEX_DIFFUSE, UNIFORM_TEX_EMISSIVE, UNIFORM_TEX_BUMP, UNIFORM_TEX_HEIGHT, UNIFORM_TEX_SHADOW0, UNIFORM_TEX_SHADOW1, UNIFORM_TEX_SHADOW2, UNIFORM_TEX_SHADOW3, UNIFORM_MTL_SHININESS, UNIFORM_MTL_ALPHA, UNIFORM_MIX_AMBIENT, UNIFORM_MIX_DIFFUSE, UNIFORM_MIX_SPECULAR, UNIFORM_MIX_TORCHDIFFUSE, UNIFORM_MIX_EMISSIVE, UNIFORM_LIGHT_DIRECTION_VIEW, UNIFORM_TORCH_ATTENUATION, UNIFORM_VEC_COLOR, UNIFORM_VEC_SPLITDATA, UNIFORM_VEC_LIGHTORTHOSCALE, UNIFORM_FLOAT_ALPHA_THRESH }
	Enum for OpenGL shader uniform locations (faster than accessing by string each time) More...

Public Member Functions
QOpenGLShaderProgram *	getShader (const GlobalShaderParameters &globals, const OBJ::Material *mat=NULL)
	Returns a shader that supports the specified operations. Must be called within a GL context. More...

QOpenGLShaderProgram *	getDebugShader ()
	Returns the Frustum/Boundingbox Debug shader. More...

QOpenGLShaderProgram *	getCubeShader ()
	Returns the cubemapping shader. More...

QOpenGLShaderProgram *	getTextureShader ()
	Returns the basic texturing shader. More...

GLint	uniformLocation (const QOpenGLShaderProgram *shad, UNIFORM uni)
	Returns the location of this uniform for this shader, or -1 if this uniform does not exist. More...

void	clearCache ()
	Clears the shaders that have been created by this manager. Must be called within a GL context. More...

Detailed Description

A simple shader cache class that gives us the correct shader depending on desired configuration.

It also contains a uniform cache to avoid unnecessary glUniformLocation calls

Definition at line 50 of file ShaderManager.hpp.

Member Enumeration Documentation

enum ShaderMgr::ATTLOC

Enum for OpenGL shader attribute locations.

Enumerator
ATTLOC_VERTEX	This is the OpenGL attribute location where vertex positions are mapped to.
ATTLOC_NORMAL	This is the OpenGL attribute location where vertex normals are mapped to.
ATTLOC_TEXCOORD	This is the OpenGL attribute location where vertex texture coordinates are mapped to.
ATTLOC_TANGENT	This is the OpenGL attribute location where vertex tangents are mapped to.
ATTLOC_BITANGENT	This is the OpenGL attribute location where vertex bitangents are mapped to.

Definition at line 57 of file ShaderManager.hpp.

enum ShaderMgr::UNIFORM

Enum for OpenGL shader uniform locations (faster than accessing by string each time)

Enumerator
UNIFORM_MAT_MODELVIEW	Defines the ModelView matrix.
UNIFORM_MAT_PROJECTION	Defines the Projection matrix.
UNIFORM_MAT_MVP	Defines the combined ModelViewProjection matrix, used if shader needs no separation of the 2 for a bit of a speedup.
UNIFORM_MAT_NORMAL	Defines the 3x3 Normal matrix (transpose of the inverse MV matrix)
UNIFORM_MAT_SHADOW0	The shadow matrices (4x 4x4 Matrices)
UNIFORM_MAT_CUBEMVP	The first cube MVP (array mat4, total 6)
UNIFORM_TEX_DIFFUSE	Defines the Diffuse texture slot.
UNIFORM_TEX_EMISSIVE	Defines the emissive texture slot.
UNIFORM_TEX_BUMP	Defines the Bump texture slot.
UNIFORM_TEX_HEIGHT	Defines the Height texture slot.
UNIFORM_TEX_SHADOW0	Shadow maps, 4x.
UNIFORM_MTL_SHININESS	Material specular shininess (exponent)
UNIFORM_MTL_ALPHA	Material global transparency.
UNIFORM_MIX_AMBIENT	(Light ambient + const factor) * Material ambient or diffuse, depending on Illum model
UNIFORM_MIX_DIFFUSE	Light directional * Material diffuse.
UNIFORM_MIX_SPECULAR	Light specular * Material specular color.
UNIFORM_MIX_TORCHDIFFUSE	Torch color * mat diffuse.
UNIFORM_MIX_EMISSIVE	Material emissive color * light emissive.
UNIFORM_LIGHT_DIRECTION_VIEW	Light direction vector (view space)
UNIFORM_TORCH_ATTENUATION	Torchlight attenuation factor (1 float, like in the second model at http://framebunker.com/blog/lighting-2-attenuation/)
UNIFORM_VEC_COLOR	simple color vec4
UNIFORM_VEC_SPLITDATA	Squared frustum splits (vec4)
UNIFORM_VEC_LIGHTORTHOSCALE	Scaling of each frustum's light ortho projection (4xvec2)
UNIFORM_FLOAT_ALPHA_THRESH	Alpha test threshold.

Definition at line 72 of file ShaderManager.hpp.

Member Function Documentation

void ShaderMgr::clearCache ( )

Clears the shaders that have been created by this manager. Must be called within a GL context.

QOpenGLShaderProgram * ShaderMgr::getCubeShader ( )

inline

Returns the cubemapping shader.

Definition at line 281 of file ShaderManager.hpp.

QOpenGLShaderProgram * ShaderMgr::getDebugShader ( )

inline

Returns the Frustum/Boundingbox Debug shader.

Definition at line 276 of file ShaderManager.hpp.

QOpenGLShaderProgram * ShaderMgr::getShader	(	const GlobalShaderParameters &	globals,
		const OBJ::Material *	mat = `NULL`
	)

inline

Returns a shader that supports the specified operations. Must be called within a GL context.

Definition at line 231 of file ShaderManager.hpp.

QOpenGLShaderProgram * ShaderMgr::getTextureShader ( )

inline

Returns the basic texturing shader.

Definition at line 286 of file ShaderManager.hpp.

GLint ShaderMgr::uniformLocation	(	const QOpenGLShaderProgram *	shad,
		UNIFORM	uni
	)

inline

Returns the location of this uniform for this shader, or -1 if this uniform does not exist.

This is cached to elimate the overhead of the glGet calls

Definition at line 291 of file ShaderManager.hpp.

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

/home/aw/devel/stellarium/0.15/plugins/Scenery3d/src/ShaderManager.hpp

Public Types

Public Member Functions

Detailed Description

Member Enumeration Documentation

Member Function Documentation