GrGLMakeNativeInterface_webgl.cpp File Reference

#include "include/gpu/ganesh/gl/GrGLMakeWebGLInterface.h"
#include "include/gpu/gl/GrGLAssembleInterface.h"
#include "include/gpu/gl/GrGLInterface.h"
#include <GLES3/gl32.h>

Go to the source code of this file.

Namespaces
namespace	GrGLInterfaces

Macros
#define	M(X)   if (0 == strcmp(#X, name)) { return (GrGLFuncPtr) X; }

Functions
static GrGLFuncPtr	webgl_get_gl_proc (void *ctx, const char name[])
SK_API sk_sp< const GrGLInterface >	GrGLInterfaces::MakeWebGL ()
sk_sp< const GrGLInterface >	GrGLMakeNativeInterface ()

Macro Definition Documentation

M

#define M

(

X

)

if (0 == strcmp(#X, name)) { return (GrGLFuncPtr) X; }

Function Documentation

GrGLMakeNativeInterface()

sk_sp< const GrGLInterface > GrGLMakeNativeInterface

(

)

Rather than depend on platform-specific GL headers and libraries, we require the client to provide a struct of GL function pointers. This struct can be specified per-GrContext as a parameter to GrContext::MakeGL. If no interface is passed to MakeGL then a default GL interface is created using GrGLMakeNativeInterface(). If this returns nullptr then GrContext::MakeGL() will fail.

The implementation of GrGLMakeNativeInterface is platform-specific. Several implementations have been provided (for GLX, WGL, EGL, etc), along with an implementation that simply returns nullptr. Clients should select the most appropriate one to build.

Definition at line 35 of file GrGLMakeNativeInterface_webgl.cpp.

                                                     {
    return GrGLInterfaces::MakeWebGL();
}

webgl_get_gl_proc()

static GrGLFuncPtr webgl_get_gl_proc ( void *  ctx, const char  name[]  )

static

Definition at line 13 of file GrGLMakeNativeInterface_webgl.cpp.

                                                                   {
 
    #define M(X) if (0 == strcmp(#X, name)) { return (GrGLFuncPtr) X; }
    M(glGetString)
    #undef M
 
    // We explicitly do not use GetProcAddress or something similar because
    // its code size is quite large. We shouldn't need GetProcAddress
    // because emscripten provides us all the valid function pointers
    // for WebGL via the included headers.
    // https://github.com/emscripten-core/emscripten/blob/7ba7700902c46734987585409502f3c63beb650f/system/include/emscripten/html5_webgl.h#L93
    SkASSERTF(false, "Can't lookup fn %s\n", name);
    return nullptr;
}