impeller::GLProc< T > Struct Template Reference

#include <proc_table_gles.h>

Public Types
using	GLFunctionType = T

Public Member Functions
template<class... Args>
auto	operator() (Args &&... args) const
	Call the GL function with the appropriate parameters. Lookup the documentation for the GL function being called to understand the arguments and return types. The arguments types must match and will be type checked.
constexpr bool	IsAvailable () const
void	Reset ()

Public Attributes
std::string_view	name = {}
GLFunctionType *	function = nullptr
PFNGLGETERRORPROC	error_fn = nullptr
bool	log_calls = false

Detailed Description

template<class T>
struct impeller::GLProc< T >

Definition at line 79 of file proc_table_gles.h.

Member Typedef Documentation

GLFunctionType

template<class T >

using impeller::GLProc< T >::GLFunctionType = T

Definition at line 80 of file proc_table_gles.h.

Member Function Documentation

IsAvailable()

template<class T >

constexpr bool impeller::GLProc< T >::IsAvailable ( ) const

inlineconstexpr

Definition at line 128 of file proc_table_gles.h.

{ return function != nullptr; }

References impeller::GLProc< T >::function.

Referenced by impeller::GLProc< T >::operator()().

operator()()

template<class T >

template<class... Args>

auto impeller::GLProc< T >::operator() ( Args &&...  args ) const

inline

Call the GL function with the appropriate parameters. Lookup the documentation for the GL function being called to understand the arguments and return types. The arguments types must match and will be type checked.

Definition at line 113 of file proc_table_gles.h.

                                        {
#if defined(IMPELLER_DEBUG) && !defined(NDEBUG)
    AutoErrorCheck error(error_fn, name);
    // We check for the existence of extensions, and reset the function pointer
    // but it's still called unconditionally below, and will segfault. This
    // validation log will at least give us a hint as to what's going on.
    FML_CHECK(IsAvailable()) << "GL function " << name << " is not available. "
                             << "This is likely due to a missing extension.";
    if (log_calls) {
      FML_LOG(IMPORTANT) << name << BuildGLArguments(args...);
    }
#endif  // defined(IMPELLER_DEBUG) && !defined(NDEBUG)
    return function(std::forward<Args>(args)...);
  }

References args, impeller::BuildGLArguments(), error, impeller::GLProc< T >::error_fn, FML_CHECK, FML_LOG, impeller::GLProc< T >::function, impeller::GLProc< T >::IsAvailable(), impeller::GLProc< T >::log_calls, and impeller::GLProc< T >::name.

Reset()

template<class T >

void impeller::GLProc< T >::Reset ( )

inline

Definition at line 130 of file proc_table_gles.h.

               {
    function = nullptr;
    error_fn = nullptr;
  }

References impeller::GLProc< T >::error_fn, and impeller::GLProc< T >::function.

Member Data Documentation

error_fn

template<class T >

PFNGLGETERRORPROC impeller::GLProc< T >::error_fn = nullptr

An optional error function. If present, all calls will be followed by an error check.

Definition at line 96 of file proc_table_gles.h.

Referenced by impeller::GLProc< T >::operator()(), and impeller::GLProc< T >::Reset().

function

template<class T >

GLFunctionType* impeller::GLProc< T >::function = nullptr

The pointer to the GL function.

Definition at line 90 of file proc_table_gles.h.

Referenced by impeller::GLProc< T >::IsAvailable(), impeller::GLProc< T >::operator()(), and impeller::GLProc< T >::Reset().

log_calls

template<class T >

bool impeller::GLProc< T >::log_calls = false

Whether the OpenGL call and its arguments should be logged.

Only works in IMPELLER_DEBUG and for environments where traditional tracing is hard. Expect log spam and only use during development.

Definition at line 104 of file proc_table_gles.h.

Referenced by impeller::GLProc< T >::operator()().

name

template<class T >

std::string_view impeller::GLProc< T >::name = {}

The name of the GL function.

Definition at line 85 of file proc_table_gles.h.

{};

Referenced by impeller::GLProc< T >::operator()(), and impeller::testing::TEST().

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

• impeller/renderer/backend/gles/proc_table_gles.h