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 #if defined(__arm__) 101 102 #define GET_TLS(reg) "mrc p15, 0, " #reg ", c13, c0, 3 \n" 103 104 #define API_ENTRY(_api) __attribute__((naked)) _api 105 106 #define CALL_GL_API(_api, ...) \ 107 asm volatile( \ 108 GET_TLS(r12) \ 109 "ldr r12, [r12, %[tls]] \n" \ 110 "cmp r12, #0 \n" \ 111 "ldrne pc, [r12, %[api]] \n" \ 112 "mov r0, #0 \n" \ 113 "bx lr \n" \ 114 : \ 115 : [tls] "J"(TLS_SLOT_OPENGL_API*4), \ 116 [api] "J"(__builtin_offsetof(gl_hooks_t, gl._api)) \ 117 : \ 118 ); 119 120 #elif defined(__mips__) 121 122 #define API_ENTRY(_api) __attribute__((noinline)) _api 123 124 #define CALL_GL_API(_api, ...) \ 125 register unsigned int _t0 asm("t0"); \ 126 register unsigned int _fn asm("t1"); \ 127 register unsigned int _tls asm("v1"); \ 128 register unsigned int _v0 asm("v0"); \ 129 asm volatile( \ 130 ".set push\n\t" \ 131 ".set noreorder\n\t" \ 132 ".set mips32r2\n\t" \ 133 "rdhwr %[tls], $29\n\t" \ 134 "lw %[t0], %[OPENGL_API](%[tls])\n\t" \ 135 "beqz %[t0], 1f\n\t" \ 136 " move %[fn], $ra\n\t" \ 137 "lw %[fn], %[API](%[t0])\n\t" \ 138 "movz %[fn], $ra, %[fn]\n\t" \ 139 "1:\n\t" \ 140 "j %[fn]\n\t" \ 141 " move %[v0], $0\n\t" \ 142 ".set pop\n\t" \ 143 : [fn] "=c"(_fn), \ 144 [tls] "=&r"(_tls), \ 145 [t0] "=&r"(_t0), \ 146 [v0] "=&r"(_v0) \ 147 : [OPENGL_API] "I"(TLS_SLOT_OPENGL_API*4), \ 148 [API] "I"(__builtin_offsetof(gl_hooks_t, gl._api)) \ 149 : \ 150 ); 151 152 #else 153 #error Unsupported architecture 154 #endif 155 156 #define CALL_GL_API_RETURN(_api, ...) \ 157 CALL_GL_API(_api, __VA_ARGS__) \ 158 return 0; // placate gcc's warnings. never reached. 159 160 #else 161 162 #if CHECK_FOR_GL_ERRORS 163 164 #define CHECK_GL_ERRORS(_api) \ 165 do { GLint err = glGetError(); \ 166 ALOGE_IF(err != GL_NO_ERROR, "%s failed (0x%04X)", #_api, err); \ 167 } while(false); 168 169 #else 170 171 #define CHECK_GL_ERRORS(_api) do { } while(false); 172 173 #endif 174 175 176 #define API_ENTRY(_api) _api 177 178 #define CALL_GL_API(_api, ...) \ 179 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \ 180 _c->_api(__VA_ARGS__); \ 181 CHECK_GL_ERRORS(_api) 182 183 #define CALL_GL_API_RETURN(_api, ...) \ 184 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \ 185 return _c->_api(__VA_ARGS__) 186 187 #endif 188 189 190 extern "C" { 191 #include "gl_api.in" 192 #include "glext_api.in" 193 } 194 195 #undef API_ENTRY 196 #undef CALL_GL_API 197 #undef CALL_GL_API_RETURN 198 199 /* 200 * glGetString() is special because we expose some extensions in the wrapper 201 */ 202 203 extern "C" const GLubyte * __glGetString(GLenum name); 204 205 const GLubyte * glGetString(GLenum name) 206 { 207 const GLubyte * ret = egl_get_string_for_current_context(name); 208 if (ret == NULL) { 209 ret = __glGetString(name); 210 } 211 return ret; 212 } 213
