fix [2421247] implement eglGetProcAddress(), needed in the ndk

Change-Id: I5027a27b43c0dd449a404024087853ca05bb8e4e

1 files changed, 176 insertions, 0 deletions

diff --git a/opengl/libs/EGL/getProcAddress.cpp b/opengl/libs/EGL/getProcAddress.cpp
new file mode 100644
index 0000000..23837ef
--- /dev/null
+++ b/opengl/libs/EGL/getProcAddress.cpp
@@ -0,0 +1,176 @@
+/*
+ ** 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.
+ */
+
+#include <ctype.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include <cutils/log.h>
+
+#include "hooks.h"
+
+// ----------------------------------------------------------------------------
+namespace android {
+// ----------------------------------------------------------------------------
+
+#undef API_ENTRY
+#undef CALL_GL_API
+#undef GL_EXTENSION
+#undef GL_EXTENSION_NAME
+
+#if defined(__arm__)
+
+    #ifdef HAVE_ARM_TLS_REGISTER
+        #define GET_TLS(reg) \
+            "mrc p15, 0, " #reg ", c13, c0, 3 \n"
+    #else
+        #define GET_TLS(reg) \
+            "mov   " #reg ", #0xFFFF0FFF      \n"  \
+            "ldr   " #reg ", [" #reg ", #-15] \n"
+    #endif
+
+    #define API_ENTRY(_api) __attribute__((naked)) _api
+
+    #define CALL_GL_EXTENSION_API(_api)                         \
+         asm volatile(                                          \
+            GET_TLS(r12)                                        \
+            "ldr   r12, [r12, %[tls]] \n"                       \
+            "cmp   r12, #0            \n"                       \
+            "ldrne r12, [r12, %[api]] \n"                       \
+            "cmpne r12, #0            \n"                       \
+            "bxne  r12                \n"                       \
+            "bx    lr                 \n"                       \
+            :                                                   \
+            : [tls] "J"(TLS_SLOT_OPENGL_API*4),                 \
+              [api] "J"(__builtin_offsetof(gl_hooks_t,          \
+                                      ext.extensions[_api]))    \
+            :                                                   \
+            );
+
+    #define GL_EXTENSION_NAME(_n)  __glExtFwd##_n
+
+    #define GL_EXTENSION(_n)                         \
+        void API_ENTRY(GL_EXTENSION_NAME(_n))() {    \
+            CALL_GL_EXTENSION_API(_n);               \
+        }
+
+
+#else
+
+    #define GL_EXTENSION_NAME(_n) NULL
+
+    #define GL_EXTENSION(_n)
+
+    #warning "eglGetProcAddress() partially supported on this architecture"
+
+#endif
+
+GL_EXTENSION(0)
+GL_EXTENSION(1)
+GL_EXTENSION(2)
+GL_EXTENSION(3)
+GL_EXTENSION(4)
+GL_EXTENSION(5)
+GL_EXTENSION(6)
+GL_EXTENSION(7)
+GL_EXTENSION(8)
+GL_EXTENSION(9)
+GL_EXTENSION(10)
+GL_EXTENSION(11)
+GL_EXTENSION(12)
+GL_EXTENSION(13)
+GL_EXTENSION(14)
+GL_EXTENSION(15)
+
+GL_EXTENSION(16)
+GL_EXTENSION(17)
+GL_EXTENSION(18)
+GL_EXTENSION(19)
+GL_EXTENSION(20)
+GL_EXTENSION(21)
+GL_EXTENSION(22)
+GL_EXTENSION(23)
+GL_EXTENSION(24)
+GL_EXTENSION(25)
+GL_EXTENSION(26)
+GL_EXTENSION(27)
+GL_EXTENSION(28)
+GL_EXTENSION(29)
+GL_EXTENSION(30)
+GL_EXTENSION(31)
+
+GL_EXTENSION(32)
+GL_EXTENSION(33)
+GL_EXTENSION(34)
+GL_EXTENSION(35)
+GL_EXTENSION(36)
+GL_EXTENSION(37)
+GL_EXTENSION(38)
+GL_EXTENSION(39)
+GL_EXTENSION(40)
+GL_EXTENSION(41)
+GL_EXTENSION(42)
+GL_EXTENSION(43)
+GL_EXTENSION(44)
+GL_EXTENSION(45)
+GL_EXTENSION(46)
+GL_EXTENSION(47)
+
+GL_EXTENSION(48)
+GL_EXTENSION(49)
+GL_EXTENSION(50)
+GL_EXTENSION(51)
+GL_EXTENSION(52)
+GL_EXTENSION(53)
+GL_EXTENSION(54)
+GL_EXTENSION(55)
+GL_EXTENSION(56)
+GL_EXTENSION(57)
+GL_EXTENSION(58)
+GL_EXTENSION(59)
+GL_EXTENSION(60)
+GL_EXTENSION(61)
+GL_EXTENSION(62)
+GL_EXTENSION(63)
+
+extern const __eglMustCastToProperFunctionPointerType gExtensionForwarders[MAX_NUMBER_OF_GL_EXTENSIONS] = {
+     GL_EXTENSION_NAME(0),  GL_EXTENSION_NAME(1),  GL_EXTENSION_NAME(2),  GL_EXTENSION_NAME(3),
+     GL_EXTENSION_NAME(4),  GL_EXTENSION_NAME(5),  GL_EXTENSION_NAME(6),  GL_EXTENSION_NAME(7),
+     GL_EXTENSION_NAME(8),  GL_EXTENSION_NAME(9),  GL_EXTENSION_NAME(10), GL_EXTENSION_NAME(11),
+     GL_EXTENSION_NAME(12), GL_EXTENSION_NAME(13), GL_EXTENSION_NAME(14), GL_EXTENSION_NAME(15),
+     GL_EXTENSION_NAME(16), GL_EXTENSION_NAME(17), GL_EXTENSION_NAME(18), GL_EXTENSION_NAME(19),
+     GL_EXTENSION_NAME(20), GL_EXTENSION_NAME(21), GL_EXTENSION_NAME(22), GL_EXTENSION_NAME(23),
+     GL_EXTENSION_NAME(24), GL_EXTENSION_NAME(25), GL_EXTENSION_NAME(26), GL_EXTENSION_NAME(27),
+     GL_EXTENSION_NAME(28), GL_EXTENSION_NAME(29), GL_EXTENSION_NAME(30), GL_EXTENSION_NAME(31),
+     GL_EXTENSION_NAME(32), GL_EXTENSION_NAME(33), GL_EXTENSION_NAME(34), GL_EXTENSION_NAME(35),
+     GL_EXTENSION_NAME(36), GL_EXTENSION_NAME(37), GL_EXTENSION_NAME(38), GL_EXTENSION_NAME(39),
+     GL_EXTENSION_NAME(40), GL_EXTENSION_NAME(41), GL_EXTENSION_NAME(42), GL_EXTENSION_NAME(43),
+     GL_EXTENSION_NAME(44), GL_EXTENSION_NAME(45), GL_EXTENSION_NAME(46), GL_EXTENSION_NAME(47),
+     GL_EXTENSION_NAME(48), GL_EXTENSION_NAME(49), GL_EXTENSION_NAME(50), GL_EXTENSION_NAME(51),
+     GL_EXTENSION_NAME(52), GL_EXTENSION_NAME(53), GL_EXTENSION_NAME(54), GL_EXTENSION_NAME(55),
+     GL_EXTENSION_NAME(56), GL_EXTENSION_NAME(57), GL_EXTENSION_NAME(58), GL_EXTENSION_NAME(59),
+     GL_EXTENSION_NAME(60), GL_EXTENSION_NAME(61), GL_EXTENSION_NAME(62), GL_EXTENSION_NAME(63)
+ };
+
+#undef GL_EXTENSION_NAME
+#undef GL_EXTENSION
+#undef API_ENTRY
+#undef CALL_GL_API
+
+// ----------------------------------------------------------------------------
+}; // namespace android
+// ----------------------------------------------------------------------------
+