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 32using 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 41extern "C" { 42GL_API void GL_APIENTRY glColorPointerBounds(GLint size, GLenum type, GLsizei stride, 43 const GLvoid *ptr, GLsizei count); 44GL_API void GL_APIENTRY glNormalPointerBounds(GLenum type, GLsizei stride, 45 const GLvoid *pointer, GLsizei count); 46GL_API void GL_APIENTRY glTexCoordPointerBounds(GLint size, GLenum type, 47 GLsizei stride, const GLvoid *pointer, GLsizei count); 48GL_API void GL_APIENTRY glVertexPointerBounds(GLint size, GLenum type, 49 GLsizei stride, const GLvoid *pointer, GLsizei count); 50GL_API void GL_APIENTRY glPointSizePointerOESBounds(GLenum type, 51 GLsizei stride, const GLvoid *pointer, GLsizei count); 52GL_API void GL_APIENTRY glMatrixIndexPointerOESBounds(GLint size, GLenum type, 53 GLsizei stride, const GLvoid *pointer, GLsizei count); 54GL_API void GL_APIENTRY glWeightPointerOESBounds(GLint size, GLenum type, 55 GLsizei stride, const GLvoid *pointer, GLsizei count); 56} 57 58void glColorPointerBounds(GLint size, GLenum type, GLsizei stride, 59 const GLvoid *ptr, GLsizei count) { 60 glColorPointer(size, type, stride, ptr); 61} 62void glNormalPointerBounds(GLenum type, GLsizei stride, 63 const GLvoid *pointer, GLsizei count) { 64 glNormalPointer(type, stride, pointer); 65} 66void glTexCoordPointerBounds(GLint size, GLenum type, 67 GLsizei stride, const GLvoid *pointer, GLsizei count) { 68 glTexCoordPointer(size, type, stride, pointer); 69} 70void glVertexPointerBounds(GLint size, GLenum type, 71 GLsizei stride, const GLvoid *pointer, GLsizei count) { 72 glVertexPointer(size, type, stride, pointer); 73} 74 75void GL_APIENTRY glPointSizePointerOESBounds(GLenum type, 76 GLsizei stride, const GLvoid *pointer, GLsizei count) { 77 glPointSizePointerOES(type, stride, pointer); 78} 79 80GL_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 85GL_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 159extern "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 172extern "C" const GLubyte * __glGetString(GLenum name); 173 174const 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