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/*
* 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/GLESv1Dispatch.h"
#include "OpenGLESDispatch/EGLDispatch.h"
#include "android/utils/debug.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "emugl/common/shared_library.h"
#define DEBUG 0
#if DEBUG
#define DPRINT(...) do { \
if (!VERBOSE_CHECK(gles1emu)) VERBOSE_ENABLE(gles1emu); \
VERBOSE_PRINT(gles1emu, __VA_ARGS__); \
} while (0)
#else
#define DPRINT(...)
#endif
static emugl::SharedLibrary *s_gles1_lib = NULL;
static emugl::SharedLibrary *s_underlying_gles2_lib = NULL;
// An unimplemented function which prints out an error message.
// To make it consistent with the guest, all GLES1 functions not supported by
// the guest driver should be redirected to this function.
static void gles1_unimplemented() {
fprintf(stderr, "Called unimplemented GLESv1 API\n");
}
#define DEFAULT_GLES_CM_LIB EMUGL_LIBNAME("GLES_CM_translator")
#define DEFAULT_UNDERLYING_GLES_V2_LIB EMUGL_LIBNAME("GLES_V2_translator")
// This section of code (also in GLDispatch.cpp)
// initializes all GLESv1 functions to dummy ones;
// that is, in case we are using a library that doesn't
// have GLESv1, we will still have stubs available to
// signal that they are unsupported on the host.
#define RETURN_void return
#define RETURN_GLboolean return GL_FALSE
#define RETURN_GLint return 0
#define RETURN_GLuint return 0U
#define RETURN_GLenum return 0
#define RETURN_int return 0
#define RETURN_GLconstubyteptr return NULL
#define RETURN_voidptr return NULL
#define RETURN_(x) RETURN_ ## x
#define DUMMY_MSG "Call to %s: host OpenGL driver does not support OpenGL ES v1. Skipping."
#ifdef _WIN32
#define DEFINE_DUMMY_FUNCTION(return_type, func_name, signature, args) \
static return_type __stdcall gles1_dummy_##func_name signature { \
fprintf(stderr, DUMMY_MSG, #func_name); \
RETURN_(return_type); \
}
#define DEFINE_DUMMY_EXTENSION_FUNCTION(return_type, func_name, signature, args) \
static return_type __stdcall gles1_dummy_##func_name signature { \
fprintf(stderr, DUMMY_MSG, #func_name); \
RETURN_(return_type); \
}
#else
#define DEFINE_DUMMY_FUNCTION(return_type, func_name, signature, args) \
static return_type gles1_dummy_##func_name signature { \
fprintf(stderr, DUMMY_MSG, #func_name); \
RETURN_(return_type); \
}
#define DEFINE_DUMMY_EXTENSION_FUNCTION(return_type, func_name, signature, args) \
static return_type gles1_dummy_##func_name signature { \
fprintf(stderr, DUMMY_MSG, #func_name); \
RETURN_(return_type); \
}
#endif
LIST_GLES1_FUNCTIONS(DEFINE_DUMMY_FUNCTION, DEFINE_DUMMY_EXTENSION_FUNCTION);
LIST_GLES12_TR_FUNCTIONS(DEFINE_DUMMY_FUNCTION);
//
// This function is called only once during initialiation before
// any thread has been created - hence it should NOT be thread safe.
//
//
// init dummy GLESv1 dispatch table
//
#define ASSIGN_DUMMY(return_type,function_name,signature,callargs) do { \
dispatch_table-> function_name = gles1_dummy_##function_name; \
} while(0);
bool gles1_dispatch_init(GLESv1Dispatch* dispatch_table) {
dispatch_table->underlying_gles2_api = NULL;
const char* libName = getenv("ANDROID_GLESv1_LIB");
if (!libName) {
libName = DEFAULT_GLES_CM_LIB;
}
// If emugl_config has detected specifically a backend
// that supports only GLESv2, set GLESv1 entry points
// to the dummy functions.
if (!strcmp(libName, "<gles2_only_backend>")) {
LIST_GLES1_FUNCTIONS(ASSIGN_DUMMY,ASSIGN_DUMMY)
DPRINT("assigning dummies because <gles2_only_backend>");
return true;
} else {
char error[256];
s_gles1_lib = emugl::SharedLibrary::open(libName, error, sizeof(error));
if (!s_gles1_lib) {
fprintf(stderr, "%s: Could not load %s [%s]\n", __FUNCTION__,
libName, error);
return false;
}
//
// init the GLES dispatch table
//
#define LOOKUP_SYMBOL(return_type,function_name,signature,callargs) do { \
dispatch_table-> function_name = reinterpret_cast< function_name ## _t >( \
s_gles1_lib->findSymbol(#function_name)); \
if ((!dispatch_table-> function_name) && s_egl.eglGetProcAddress) \
dispatch_table-> function_name = reinterpret_cast< function_name ## _t >( \
s_egl.eglGetProcAddress(#function_name)); \
} while(0); \
LIST_GLES1_FUNCTIONS(LOOKUP_SYMBOL,LOOKUP_SYMBOL)
DPRINT("successful");
LIST_GLES12_TR_FUNCTIONS(ASSIGN_DUMMY);
// If we are using the translator,
// import the gles1->2 translator dll
if (strstr(libName, "GLES12Translator")) {
DPRINT("trying to assign gles12-specific functions");
LIST_GLES12_TR_FUNCTIONS(LOOKUP_SYMBOL);
DPRINT("hopefully, successfully assigned "
"12tr-specific functions...");
DPRINT("Now creating the underlying api");
UnderlyingApis* gles2api =
(UnderlyingApis*)dispatch_table->create_underlying_api();
dispatch_table->underlying_gles2_api = gles2api;
DPRINT("api ptr:%p", dispatch_table->underlying_gles2_api);
#define SET_UNDERLYING_GLES2_FUNC(rett, function_name, sig, callargs) do { \
dispatch_table->underlying_gles2_api->angle-> function_name = \
reinterpret_cast< function_name ## _t >( \
s_underlying_gles2_lib->findSymbol(#function_name)); \
} while(0);
DPRINT("trying to initialize GLESv1->2 translation");
const char* underlying_gles2_lib_name =
getenv("ANDROID_GLESv2_LIB");
if (!underlying_gles2_lib_name) {
underlying_gles2_lib_name = DEFAULT_UNDERLYING_GLES_V2_LIB;
}
s_underlying_gles2_lib =
emugl::SharedLibrary::open(underlying_gles2_lib_name,
error, sizeof(error));
if (!s_underlying_gles2_lib) {
DPRINT("Could not load underlying gles2 lib %s [%s]",
libName, error);
return false;
}
DPRINT("done trying to get gles2 lib");
LIST_GLES2_FUNCTIONS(SET_UNDERLYING_GLES2_FUNC,
SET_UNDERLYING_GLES2_FUNC);
}
return true;
}
}
//
// This function is called only during initialization of the decoder before
// any thread has been created - hence it should NOT be thread safe.
//
void *gles1_dispatch_get_proc_func(const char *name, void *userData)
{
void* func = NULL;
if (s_gles1_lib) {
func = (void *)s_gles1_lib->findSymbol(name);
}
// To make it consistent with the guest, redirect any unsupported functions
// to gles1_unimplemented.
if (!func) {
func = (void *)gles1_unimplemented;
}
return func;
}
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