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graphics: use dummy GLESv1 by default

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Newer Ubuntu systems tend to not provide a libGLESv1_CM.so.1 anymore. As
we're not required to have a GLESv1 implementation (only a few older
Android apps are using GLESv1) we can as easy fix avoid loading a real
GLESv1 implementation and assign dummy functions instead to all relevant
GLESv1 API calls. In the future we want to switch to a GLESv1->GLESv2
translator as the Android emulator does.
This commit is contained in:
Simon Fels 2018-05-15 08:53:21 +02:00
commit 01ef1d23de
2 changed files with 33 additions and 24 deletions
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43
external/android-emugl/host/libs/libOpenGLESDispatch/GLESv1Dispatch.cpp vendored
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@ -25,24 +25,40 @@ extern EGLDispatch s_egl;
static emugl::SharedLibrary *s_gles1_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 driver should be redirected to this function.
static void gles1_unimplemented() {
fprintf(stderr, "Called unimplemented GLESv1 API\n");
}
//
// This function is called only once during initialiation before
// any thread has been created - hence it should NOT be thread safe.
//
static void gles1_dummy() {}
#define ASSIGN_DUMMY(return_type, function_name, signature, call_args) do { \
dispatch_table-> function_name = reinterpret_cast<function_name ## _t>(gles1_dummy); \
} while(0);
#define LOOKUP_SYMBOL(return_type,function_name,signature,callargs) \
dispatch_table-> function_name = reinterpret_cast< function_name ## _t >( \
s_gles1_lib->findSymbol(#function_name));
#define LOOKUP_EXT_SYMBOL(return_type,function_name,signature,callargs) \
dispatch_table-> function_name = reinterpret_cast< function_name ## _t >( \
s_egl.eglGetProcAddress(#function_name));
namespace {
constexpr const char *glesv1_lib_env_var{"ANBOX_GLESv1_LIB"};
}
bool gles1_dispatch_init(const char *path, GLESv1Dispatch* dispatch_table) {
if (!dispatch_table)
return false;
// If no path is given we assign dummy functions to all GL calls
// we would have loaded from a real implementation.
if (!path) {
LIST_GLES1_FUNCTIONS(ASSIGN_DUMMY, ASSIGN_DUMMY);
return true;
}
const char* libName = getenv(glesv1_lib_env_var);
if (!libName)
libName = path;
@ -57,17 +73,6 @@ bool gles1_dispatch_init(const char *path, GLESv1Dispatch* dispatch_table) {
return false;
}
//
// init the GLES dispatch table
//
#define LOOKUP_SYMBOL(return_type,function_name,signature,callargs) \
dispatch_table-> function_name = reinterpret_cast< function_name ## _t >( \
s_gles1_lib->findSymbol(#function_name));
#define LOOKUP_EXT_SYMBOL(return_type,function_name,signature,callargs) \
dispatch_table-> function_name = reinterpret_cast< function_name ## _t >( \
s_egl.eglGetProcAddress(#function_name));
LIST_GLES1_FUNCTIONS(LOOKUP_SYMBOL,LOOKUP_EXT_SYMBOL)
dispatch_table->initialized = true;