123 lines
4.1 KiB
C++
123 lines
4.1 KiB
C++
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/*
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** Copyright 2009, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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#include <ctype.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <cutils/log.h>
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#include "hooks.h"
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// ----------------------------------------------------------------------------
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namespace android {
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// ----------------------------------------------------------------------------
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#undef API_ENTRY
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#undef CALL_GL_EXTENSION_API
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#undef GL_EXTENSION
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#undef GL_EXTENSION_NAME
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#undef GL_EXTENSION_ARRAY
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#undef GL_EXTENSION_LIST
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#undef GET_TLS
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#if defined(__arm__)
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#ifdef HAVE_ARM_TLS_REGISTER
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#define GET_TLS(reg) \
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"mrc p15, 0, " #reg ", c13, c0, 3 \n"
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#else
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#define GET_TLS(reg) \
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"mov " #reg ", #0xFFFF0FFF \n" \
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"ldr " #reg ", [" #reg ", #-15] \n"
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#endif
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#define API_ENTRY(_api) __attribute__((naked)) _api
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#define CALL_GL_EXTENSION_API(_api) \
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asm volatile( \
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GET_TLS(r12) \
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"ldr r12, [r12, %[tls]] \n" \
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"cmp r12, #0 \n" \
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"ldrne r12, [r12, %[api]] \n" \
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"cmpne r12, #0 \n" \
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"bxne r12 \n" \
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"bx lr \n" \
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: \
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: [tls] "J"(TLS_SLOT_OPENGL_API*4), \
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[api] "J"(__builtin_offsetof(gl_hooks_t, \
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ext.extensions[_api])) \
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: \
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);
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#define GL_EXTENSION_NAME(_n) __glExtFwd##_n
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#define GL_EXTENSION(_n) \
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void API_ENTRY(GL_EXTENSION_NAME(_n))() { \
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CALL_GL_EXTENSION_API(_n); \
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}
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#else
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#define GL_EXTENSION_NAME(_n) NULL
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#define GL_EXTENSION(_n)
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#warning "eglGetProcAddress() partially supported on this architecture"
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#endif
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#define GL_EXTENSION_LIST(name) \
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name(0) name(1) name(2) name(3) \
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name(4) name(5) name(6) name(7) \
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name(8) name(9) name(10) name(11) \
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name(12) name(13) name(14) name(15) \
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name(16) name(17) name(18) name(19) \
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name(20) name(21) name(22) name(23) \
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name(24) name(25) name(26) name(27) \
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name(28) name(29) name(30) name(31) \
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name(32) name(33) name(34) name(35) \
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name(36) name(37) name(38) name(39) \
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name(40) name(41) name(42) name(43) \
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name(44) name(45) name(46) name(47) \
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name(48) name(49) name(50) name(51) \
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name(52) name(53) name(54) name(55) \
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name(56) name(57) name(58) name(59) \
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name(60) name(61) name(62) name(63)
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GL_EXTENSION_LIST( GL_EXTENSION )
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#define GL_EXTENSION_ARRAY(_n) GL_EXTENSION_NAME(_n),
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extern const __eglMustCastToProperFunctionPointerType gExtensionForwarders[MAX_NUMBER_OF_GL_EXTENSIONS] = {
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GL_EXTENSION_LIST( GL_EXTENSION_ARRAY )
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};
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#undef GET_TLS
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#undef GL_EXTENSION_LIST
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#undef GL_EXTENSION_ARRAY
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#undef GL_EXTENSION_NAME
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#undef GL_EXTENSION
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#undef API_ENTRY
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#undef CALL_GL_EXTENSION_API
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// ----------------------------------------------------------------------------
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}; // namespace android
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// ----------------------------------------------------------------------------
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