GLUtils

Functions

	Name
GLuint	createProgram(const GLuint * shaders)<br>helper function for shader linking - overloaded
GLuint	createProgram(const std::vector< GLuint > & shaderList)<br>helper function for shader linking
GLuint	createShaderFromFile(GLenum eShaderType, const std::string & filename, const std::string & sourceToInject)<br>helper function for shader compiling and loading
GLuint	createShaderFromSource(GLenum eShaderType, const std::string & strShaderText)<br>helper function for shader compiling
GLuint	createTexture(const std::string & fileName, bool mipmap, bool clampToEdge)
void	deleteProgramAndShaders(GLuint program)<br>deletes the shader program and all attached shaders
void	injectSourceIntoShader(std::string & source, const std::string & shaderName, const std::string & sourceToInject)
bool	linkProgram(GLuint program)
bool	linkProgram(GLuint program)
bool	loadTexImage2D(const std::string & fileName, GLenum target)

Functions Documentation

function createProgram

GLuint createProgram(
    const GLuint * shaders
)

helper function for shader linking - overloaded

Parameters:

• shaders zero ended array of shader ids - for example {vsid, fsid, 0}

See: createProgram

Return: opengl shader program id or 0 on failure

This is the overloaded version of createProgram().

function createProgram

GLuint createProgram(
    const std::vector< GLuint > & shaderList
)

helper function for shader linking

Parameters:

• shaderList array of compiled shaders to attach, you can use createShaderFromSource() for example to fill the array

Return: opengl shader program id or 0 on failure

The function internaly uses glCreateProgram, glAttachShader to attach all supplied shaders and finally glLinkProgram. Any GLSL errors and warnings are printed to stderr.

function createShaderFromFile

GLuint createShaderFromFile(
    GLenum eShaderType,
    const std::string & filename,
    const std::string & sourceToInject
)

helper function for shader compiling and loading

Parameters:

• eShaderType we support GL_VERTEX_SHADER, GL_FRAGMENT_SHADER and GL_GEOMETRY_SHADER values
• filename file to use as a shader source
• sourceToInject text to insert right after the glsl version declaration, do nothing if its an empty string

Return: opengl shader id or 0 on failure

This function loads shader source from file named filename and calls createShaderFromSource().

function createShaderFromSource

GLuint createShaderFromSource(
    GLenum eShaderType,
    const std::string & strShaderText
)

helper function for shader compiling

Parameters:

• eShaderType we support GL_VERTEX_SHADER, GL_FRAGMENT_SHADER and GL_GEOMETRY_SHADER values
• strShaderText GLSL code to be used as a glShaderSource argument

Return: opengl shader id or 0 on failure

The function internaly uses glCreateShader, glShaderSource and glCompileShader sequence. glGetShaderiv is used to detect compile errors, the function prints GLSL errors and warnings to stderr.

function createTexture

GLuint createTexture(
    const std::string & fileName,
    bool mipmap,
    bool clampToEdge
)

function deleteProgramAndShaders

void deleteProgramAndShaders(
    GLuint program
)

deletes the shader program and all attached shaders

You should delete all shader programs before your application terminates.

function injectSourceIntoShader

void injectSourceIntoShader(
    std::string & source,
    const std::string & shaderName,
    const std::string & sourceToInject
)

function linkProgram

static bool linkProgram(
    GLuint program
)

function linkProgram

static bool linkProgram(
    GLuint program
)

function loadTexImage2D

bool loadTexImage2D(
    const std::string & fileName,
    GLenum target
)

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Updated on 2026-09-11 at 21:24:25 +0000