implement a real loader for EGL drivers

we now look for a config file in /system/lib/egl/egl.cfg that describes the association of a display to a driver.
these drivers are named: /system/lib/egl/lib{[EGL|GLESv1_CM|GLESv2] | GLES}_$TAG.so

1 files changed, 90 insertions, 0 deletions

diff --git a/opengl/libs/EGL/Loader.h b/opengl/libs/EGL/Loader.h
new file mode 100644
index 0000000..69f6dd5
--- /dev/null
+++ b/opengl/libs/EGL/Loader.h
@@ -0,0 +1,90 @@
+/* 
+ ** Copyright 2009, 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.
+ */
+
+#ifndef ANDROID_EGL_LOADER_H
+#define ANDROID_EGL_LOADER_H
+
+#include <ctype.h>
+#include <string.h>
+#include <errno.h>
+
+#include <utils/Errors.h>
+#include <utils/Singleton.h>
+#include <utils/String8.h>
+#include <utils/Vector.h>
+
+#include <EGL/egl.h>
+
+// ----------------------------------------------------------------------------
+namespace android {
+// ----------------------------------------------------------------------------
+
+struct gl_hooks_t;
+
+class Loader : public Singleton<Loader>
+{
+    friend class Singleton<Loader>;
+
+    typedef __eglMustCastToProperFunctionPointerType (*getProcAddressType)(
+            const char*);
+   
+    enum {
+        EGL         = 0x01,
+        GLESv1_CM   = 0x02,
+        GLESv2      = 0x04
+    };
+    struct driver_t {
+        driver_t(void* gles);
+        ~driver_t();
+        status_t set(void* hnd, int32_t api);
+        void* dso[3];
+    };
+    
+    struct entry_t {
+        entry_t() { }
+        entry_t(int dpy, int impl, const char* tag);
+        int dpy;
+        int impl;
+        String8 tag;
+    };
+
+    Vector<entry_t> gConfig;    
+    getProcAddressType getProcAddress;
+    
+    const char* getTag(int dpy, int impl);
+
+public:
+    ~Loader();
+    
+    void* open(EGLNativeDisplayType display, int impl, gl_hooks_t* hooks);
+    status_t close(void* driver);
+    
+private:
+    Loader();
+    void *load_driver(const char* driver, gl_hooks_t* hooks, uint32_t mask);
+
+    static __attribute__((noinline))
+    void init_api(void* dso, 
+            char const * const * api, 
+            __eglMustCastToProperFunctionPointerType* curr, 
+            getProcAddressType getProcAddress); 
+};
+
+// ----------------------------------------------------------------------------
+}; // namespace android
+// ----------------------------------------------------------------------------
+
+#endif /* ANDROID_EGL_LOADER_H */