1 /* 2 ** Copyright 2007, The Android Open Source Project 3 ** 4 ** Licensed under the Apache License, Version 2.0 (the "License"); 5 ** you may not use this file except in compliance with the License. 6 ** You may obtain a copy of the License at 7 ** 8 ** http://www.apache.org/licenses/LICENSE-2.0 9 ** 10 ** Unless required by applicable law or agreed to in writing, software 11 ** distributed under the License is distributed on an "AS IS" BASIS, 12 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 ** See the License for the specific language governing permissions and 14 ** limitations under the License. 15 */ 16 17 #include <ctype.h> 18 #include <string.h> 19 #include <errno.h> 20 21 #include <sys/ioctl.h> 22 23 #include <GLES/gl.h> 24 #include <GLES/glext.h> 25 26 #include <cutils/log.h> 27 #include <cutils/properties.h> 28 29 #include "hooks.h" 30 #include "egl_impl.h" 31 32 using namespace android; 33 34 // set this to 1 for crude GL debugging 35 #define CHECK_FOR_GL_ERRORS 0 36 37 // ---------------------------------------------------------------------------- 38 // extensions for the framework 39 // ---------------------------------------------------------------------------- 40 41 extern "C" { 42 GL_API void GL_APIENTRY glColorPointerBounds(GLint size, GLenum type, GLsizei stride, 43 const GLvoid *ptr, GLsizei count); 44 GL_API void GL_APIENTRY glNormalPointerBounds(GLenum type, GLsizei stride, 45 const GLvoid *pointer, GLsizei count); 46 GL_API void GL_APIENTRY glTexCoordPointerBounds(GLint size, GLenum type, 47 GLsizei stride, const GLvoid *pointer, GLsizei count); 48 GL_API void GL_APIENTRY glVertexPointerBounds(GLint size, GLenum type, 49 GLsizei stride, const GLvoid *pointer, GLsizei count); 50 GL_API void GL_APIENTRY glPointSizePointerOESBounds(GLenum type, 51 GLsizei stride, const GLvoid *pointer, GLsizei count); 52 GL_API void GL_APIENTRY glMatrixIndexPointerOESBounds(GLint size, GLenum type, 53 GLsizei stride, const GLvoid *pointer, GLsizei count); 54 GL_API void GL_APIENTRY glWeightPointerOESBounds(GLint size, GLenum type, 55 GLsizei stride, const GLvoid *pointer, GLsizei count); 56 } 57 58 void glColorPointerBounds(GLint size, GLenum type, GLsizei stride, 59 const GLvoid *ptr, GLsizei count) { 60 glColorPointer(size, type, stride, ptr); 61 } 62 void glNormalPointerBounds(GLenum type, GLsizei stride, 63 const GLvoid *pointer, GLsizei count) { 64 glNormalPointer(type, stride, pointer); 65 } 66 void glTexCoordPointerBounds(GLint size, GLenum type, 67 GLsizei stride, const GLvoid *pointer, GLsizei count) { 68 glTexCoordPointer(size, type, stride, pointer); 69 } 70 void glVertexPointerBounds(GLint size, GLenum type, 71 GLsizei stride, const GLvoid *pointer, GLsizei count) { 72 glVertexPointer(size, type, stride, pointer); 73 } 74 75 void GL_APIENTRY glPointSizePointerOESBounds(GLenum type, 76 GLsizei stride, const GLvoid *pointer, GLsizei count) { 77 glPointSizePointerOES(type, stride, pointer); 78 } 79 80 GL_API void GL_APIENTRY glMatrixIndexPointerOESBounds(GLint size, GLenum type, 81 GLsizei stride, const GLvoid *pointer, GLsizei count) { 82 glMatrixIndexPointerOES(size, type, stride, pointer); 83 } 84 85 GL_API void GL_APIENTRY glWeightPointerOESBounds(GLint size, GLenum type, 86 GLsizei stride, const GLvoid *pointer, GLsizei count) { 87 glWeightPointerOES(size, type, stride, pointer); 88 } 89 90 // ---------------------------------------------------------------------------- 91 // Actual GL entry-points 92 // ---------------------------------------------------------------------------- 93 94 #undef API_ENTRY 95 #undef CALL_GL_API 96 #undef CALL_GL_API_RETURN 97 98 #if USE_FAST_TLS_KEY && !CHECK_FOR_GL_ERRORS 99 100 #ifdef HAVE_ARM_TLS_REGISTER 101 #define GET_TLS(reg) \ 102 "mrc p15, 0, " #reg ", c13, c0, 3 \n" 103 #else 104 #define GET_TLS(reg) \ 105 "mov " #reg ", #0xFFFF0FFF \n" \ 106 "ldr " #reg ", [" #reg ", #-15] \n" 107 #endif 108 109 #define API_ENTRY(_api) __attribute__((naked)) _api 110 111 #define CALL_GL_API(_api, ...) \ 112 asm volatile( \ 113 GET_TLS(r12) \ 114 "ldr r12, [r12, %[tls]] \n" \ 115 "cmp r12, #0 \n" \ 116 "ldrne pc, [r12, %[api]] \n" \ 117 "mov r0, #0 \n" \ 118 "bx lr \n" \ 119 : \ 120 : [tls] "J"(TLS_SLOT_OPENGL_API*4), \ 121 [api] "J"(__builtin_offsetof(gl_hooks_t, gl._api)) \ 122 : \ 123 ); 124 125 #define CALL_GL_API_RETURN(_api, ...) \ 126 CALL_GL_API(_api, __VA_ARGS__) \ 127 return 0; // placate gcc's warnings. never reached. 128 129 #else 130 131 #if CHECK_FOR_GL_ERRORS 132 133 #define CHECK_GL_ERRORS(_api) \ 134 do { GLint err = glGetError(); \ 135 ALOGE_IF(err != GL_NO_ERROR, "%s failed (0x%04X)", #_api, err); \ 136 } while(false); 137 138 #else 139 140 #define CHECK_GL_ERRORS(_api) do { } while(false); 141 142 #endif 143 144 145 #define API_ENTRY(_api) _api 146 147 #define CALL_GL_API(_api, ...) \ 148 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \ 149 _c->_api(__VA_ARGS__); \ 150 CHECK_GL_ERRORS(_api) 151 152 #define CALL_GL_API_RETURN(_api, ...) \ 153 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \ 154 return _c->_api(__VA_ARGS__) 155 156 #endif 157 158 159 extern "C" { 160 #include "gl_api.in" 161 #include "glext_api.in" 162 } 163 164 #undef API_ENTRY 165 #undef CALL_GL_API 166 #undef CALL_GL_API_RETURN 167 168 /* 169 * glGetString() is special because we expose some extensions in the wrapper 170 */ 171 172 extern "C" const GLubyte * __glGetString(GLenum name); 173 174 const GLubyte * glGetString(GLenum name) 175 { 176 const GLubyte * ret = egl_get_string_for_current_context(name); 177 if (ret == NULL) { 178 ret = __glGetString(name); 179 } 180 return ret; 181 } 182
