nlua_shader.c File Reference

Handles shaders. More...

#include "nlua_shader.h"
#include "array.h"
#include "nlua_tex.h"
#include "nluadef.h"
#include "render.h"

Include dependency graph for nlua_shader.c:

Go to the source code of this file.

Macros
#define	ATTRIB(name)
#define	UNIFORM(name)

Functions
static int	shaderL_gc (lua_State *L)
	Frees a shader.
static int	shaderL_eq (lua_State *L)
	Compares two shaders to see if they are the same.
static int	shaderL_new (lua_State *L)
	Creates a new shader.
static int	shaderL_send (lua_State *L)
	Allows setting values of uniforms for a shader. Errors out if the uniform is unknown or unused (as in optimized out by the compiler).
static int	shaderL_sendRaw (lua_State *L)
	Allows setting values of uniforms for a shader, while ignoring unknown (or unused) uniforms.
static int	shaderL_hasUniform (lua_State *L)
	Checks to see if a shader has a uniform.
static int	shaderL_addPostProcess (lua_State *L)
	Sets a shader as a post-processing shader.
static int	shaderL_rmPostProcess (lua_State *L)
	Removes a shader as a post-processing shader.
static int	shader_compareUniform (const void *a, const void *b)
static int	shader_searchUniform (const void *id, const void *u)
static LuaUniform_t *	shader_getUniform (const LuaShader_t *ls, const char *name)
static int	shaderL_sendHelper (lua_State *L, int ignore_missing)
	Helper to set the uniform while handling unknown/inactive uniforms.
int	nlua_loadShader (nlua_env env)
	Loads the shader library.
LuaShader_t *	lua_toshader (lua_State *L, int ind)
	Lua bindings to interact with shaders.
LuaShader_t *	luaL_checkshader (lua_State *L, int ind)
	Gets shader at index or raises error if there is no shader at index.
LuaShader_t *	lua_pushshader (lua_State *L, LuaShader_t shader)
	Pushes a shader on the stack.
int	lua_isshader (lua_State *L, int ind)
	Checks to see if ind is a shader.
void	shader_parseUniformArgsFloat (GLfloat values[4], lua_State *L, int idx, int n)
	Helper to parse up float vector (or arguments).
void	shader_parseUniformArgsInt (GLint values[4], lua_State *L, int idx, int n)
	Helper to parse up integer vector (or arguments).

Variables
static const luaL_Reg	shaderL_methods []

Detailed Description

Handles shaders.

Definition in file nlua_shader.c.

Macro Definition Documentation

ATTRIB

#define ATTRIB

(

name

)

Value:

   shader.name = glGetAttribLocation( shader.program, #name )

UNIFORM

#define UNIFORM

(

name

)

Value:

   shader.name = glGetUniformLocation( shader.program, #name )

Function Documentation

lua_isshader()

int lua_isshader	(	lua_State *	L,
		int	ind )

Checks to see if ind is a shader.

Parameters

L	Lua state to check.
ind	Index position to check.

Returns

1 if ind is a shader.

Definition at line 112 of file nlua_shader.c.

lua_pushshader()

LuaShader_t * lua_pushshader	(	lua_State *	L,
		LuaShader_t	shader )

Pushes a shader on the stack.

Parameters

L	Lua state to push shader into.
shader	Shader to push.

Returns

Newly pushed shader.

Definition at line 97 of file nlua_shader.c.

lua_toshader()

LuaShader_t * lua_toshader	(	lua_State *	L,
		int	ind )

Lua bindings to interact with shaders.

Lua module: shader

Gets shader at index.

Parameters

L	Lua state to get shader from.
ind	Index position to find the shader.

Returns

Shader found at the index in the state.

Definition at line 72 of file nlua_shader.c.

luaL_checkshader()

LuaShader_t * luaL_checkshader	(	lua_State *	L,
		int	ind )

Gets shader at index or raises error if there is no shader at index.

Parameters

L	Lua state to get shader from.
ind	Index position to find shader.

Returns

Shader found at the index in the state.

Definition at line 83 of file nlua_shader.c.

nlua_loadShader()

int nlua_loadShader

(

nlua_env

env

)

Loads the shader library.

Parameters

env	Environment to load shader library into.

Returns

0 on success.

Definition at line 54 of file nlua_shader.c.

shader_compareUniform()

int shader_compareUniform ( const void * a, const void * b )

static

Definition at line 167 of file nlua_shader.c.

shader_getUniform()

LuaUniform_t * shader_getUniform ( const LuaShader_t * ls, const char * name )

static

Definition at line 180 of file nlua_shader.c.

shader_parseUniformArgsFloat()

void shader_parseUniformArgsFloat	(	GLfloat	values[4],
		lua_State *	L,
		int	idx,
		int	n )

Helper to parse up float vector (or arguments).

Definition at line 271 of file nlua_shader.c.

shader_parseUniformArgsInt()

void shader_parseUniformArgsInt	(	GLint	values[4],
		lua_State *	L,
		int	idx,
		int	n )

Helper to parse up integer vector (or arguments).

Definition at line 290 of file nlua_shader.c.

shader_searchUniform()

int shader_searchUniform ( const void * id, const void * u )

static

Definition at line 175 of file nlua_shader.c.

shaderL_addPostProcess()

int shaderL_addPostProcess ( lua_State * L )

static

Sets a shader as a post-processing shader.

Lua function parameter: Shader shader Shader to set as a post-processing shader. Lua function parameter:[opt="final"] string layer Layer to add the shader to. Lua function parameter:[opt=0] number priority Priority of the shader to set. Higher values mean it is run later. Lua return parameter: boolean true on success.

Parameters

L

Lua State

Returns

Number of variables on the Lua State stack.

Lua function: addPPShader

Definition at line 441 of file nlua_shader.c.

shaderL_eq()

int shaderL_eq ( lua_State * L )

static

Compares two shaders to see if they are the same.

Lua function parameter: Shader f1 Shader 1 to compare. Lua function parameter: Shader f2 Shader 2 to compare. Lua return parameter: boolean true if both shaders are the same.

Parameters

L

Lua State

Returns

Number of variables on the Lua State stack.

Lua function: __eq

Definition at line 155 of file nlua_shader.c.

shaderL_gc()

int shaderL_gc ( lua_State * L )

static

Frees a shader.

Lua function parameter: Shader shader Shader to free.

Parameters

L

Lua State

Returns

Number of variables on the Lua State stack.

Lua function: __gc

Definition at line 134 of file nlua_shader.c.

shaderL_hasUniform()

int shaderL_hasUniform ( lua_State * L )

static

Checks to see if a shader has a uniform.

Lua function parameter: Shader shader Shader to send uniform to. Lua function parameter: string name Name of the uniform to check. Lua return parameter: boolean true if the shader has the uniform.

Parameters

L

Lua State

Returns

Number of variables on the Lua State stack.

Lua function: hasUniform

Definition at line 420 of file nlua_shader.c.

shaderL_new()

int shaderL_new ( lua_State * L )

static

Creates a new shader.

Lua function parameter: string vertex Script containing the vertex shader. Lua function parameter: string fragment String containing the fragment shader. Lua return parameter: Shader A newly created shader.

Parameters

L

Lua State

Returns

Number of variables on the Lua State stack.

Lua function: new

Definition at line 195 of file nlua_shader.c.

shaderL_rmPostProcess()

int shaderL_rmPostProcess ( lua_State * L )

static

Removes a shader as a post-processing shader.

Lua function parameter: Shader shader Shader to disable as post-processing shader. Lua return parameter: boolean True on success.

Parameters

L

Lua State

Returns

Number of variables on the Lua State stack.

Lua function: rmPPShader

Definition at line 475 of file nlua_shader.c.

shaderL_send()

int shaderL_send ( lua_State * L )

static

Allows setting values of uniforms for a shader. Errors out if the uniform is unknown or unused (as in optimized out by the compiler).

Lua function parameter: Shader shader Shader to send uniform to. Lua function parameter: string name Name of the uniform.

Parameters

L

Lua State

Returns

Number of variables on the Lua State stack.

Lua function: send

Definition at line 313 of file nlua_shader.c.

shaderL_sendHelper()

int shaderL_sendHelper ( lua_State * L, int ignore_missing )

static

Helper to set the uniform while handling unknown/inactive uniforms.

Definition at line 334 of file nlua_shader.c.

shaderL_sendRaw()

int shaderL_sendRaw ( lua_State * L )

static

Allows setting values of uniforms for a shader, while ignoring unknown (or unused) uniforms.

Lua function parameter: Shader shader Shader to send uniform to. Lua function parameter: string name Name of the uniform.

Parameters

L

Lua State

Returns

Number of variables on the Lua State stack.

Lua function: send

Definition at line 326 of file nlua_shader.c.

Variable Documentation

shaderL_methods

const luaL_Reg shaderL_methods[]

static

Initial value:

= {
   { "__gc", shaderL_gc },
   { "__eq", shaderL_eq },
   { "new", shaderL_new },
   { "send", shaderL_send },
   { "sendRaw", shaderL_sendRaw },
   { "hasUniform", shaderL_hasUniform },
   { "addPPShader", shaderL_addPostProcess },
   { "rmPPShader", shaderL_rmPostProcess },
   { 0, 0 } }

Shader metatable methods.

Definition at line 30 of file nlua_shader.c.