diff options
Diffstat (limited to 'opengl/libs/EGL/getProcAddress.cpp')
| -rw-r--r-- | opengl/libs/EGL/getProcAddress.cpp | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/opengl/libs/EGL/getProcAddress.cpp b/opengl/libs/EGL/getProcAddress.cpp new file mode 100644 index 000000000000..dcf8735c634d --- /dev/null +++ b/opengl/libs/EGL/getProcAddress.cpp @@ -0,0 +1,122 @@ +/* + ** 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_EXTENSION_API +#undef GL_EXTENSION +#undef GL_EXTENSION_NAME +#undef GL_EXTENSION_ARRAY +#undef GL_EXTENSION_LIST +#undef GET_TLS + +#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 + +#define GL_EXTENSION_LIST(name) \ + name(0) name(1) name(2) name(3) \ + name(4) name(5) name(6) name(7) \ + name(8) name(9) name(10) name(11) \ + name(12) name(13) name(14) name(15) \ + name(16) name(17) name(18) name(19) \ + name(20) name(21) name(22) name(23) \ + name(24) name(25) name(26) name(27) \ + name(28) name(29) name(30) name(31) \ + name(32) name(33) name(34) name(35) \ + name(36) name(37) name(38) name(39) \ + name(40) name(41) name(42) name(43) \ + name(44) name(45) name(46) name(47) \ + name(48) name(49) name(50) name(51) \ + name(52) name(53) name(54) name(55) \ + name(56) name(57) name(58) name(59) \ + name(60) name(61) name(62) name(63) + + +GL_EXTENSION_LIST( GL_EXTENSION ) + +#define GL_EXTENSION_ARRAY(_n) GL_EXTENSION_NAME(_n), + +extern const __eglMustCastToProperFunctionPointerType gExtensionForwarders[MAX_NUMBER_OF_GL_EXTENSIONS] = { + GL_EXTENSION_LIST( GL_EXTENSION_ARRAY ) + }; + +#undef GET_TLS +#undef GL_EXTENSION_LIST +#undef GL_EXTENSION_ARRAY +#undef GL_EXTENSION_NAME +#undef GL_EXTENSION +#undef API_ENTRY +#undef CALL_GL_EXTENSION_API + +// ---------------------------------------------------------------------------- +}; // namespace android +// ---------------------------------------------------------------------------- + |