host/gl/OpenGLESDispatch/GLESv2Dispatch.cpp

/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "OpenGLESDispatch/GLESv2Dispatch.h"

#include "OpenGLESDispatch/EGLDispatch.h"
#include "OpenGLESDispatch/StaticDispatch.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define DEFAULT_GLES_V2_LIB EMUGL_LIBNAME("GLES_V2_translator")

namespace gfxstream {
namespace gl {

// An unimplemented function which prints out an error message.
// To make it consistent with the guest, all GLES2 functions not supported by
// the driver should be redirected to this function.

void gles2_unimplemented() {
    fprintf(stderr, "Called unimplemented GLES API\n");
}

#define LOOKUP_SYMBOL_STATIC(return_type, function_name, signature, callargs)    \
    dispatch_table->function_name =                                              \
        reinterpret_cast<function_name##_t>(::translator::gles2::function_name); \
    if ((!dispatch_table->function_name) && s_egl.eglGetProcAddress)             \
        dispatch_table->function_name =                                          \
            reinterpret_cast<function_name##_t>(s_egl.eglGetProcAddress(#function_name));

bool gles2_dispatch_init(GLESv2Dispatch* dispatch_table) {
    if (dispatch_table->initialized) return true;

    LIST_GLES2_FUNCTIONS(LOOKUP_SYMBOL_STATIC,LOOKUP_SYMBOL_STATIC)

    dispatch_table->initialized = true;
    return true;
}


void *gles2_dispatch_get_proc_func(const char *name, void *userData)
{
    void* func = NULL;
    func = gles2_dispatch_get_proc_func_static(name);

    // To make it consistent with the guest, redirect any unsupported functions
    // to gles2_unimplemented.
    if (!func) {
        func = (void *)gles2_unimplemented;
    }
    return func;
}

}  // namespace gl
}  // namespace gfxstream