1/*
2 ** Copyright 2009, 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 <stdlib.h>
19#include <errno.h>
20
21#include <cutils/log.h>
22
23#include "egldefs.h"
24#include "hooks.h"
25
26// ----------------------------------------------------------------------------
27namespace android {
28// ----------------------------------------------------------------------------
29
30#undef API_ENTRY
31#undef CALL_GL_EXTENSION_API
32#undef GL_EXTENSION
33#undef GL_EXTENSION_NAME
34#undef GL_EXTENSION_ARRAY
35#undef GL_EXTENSION_LIST
36#undef GET_TLS
37
38#if USE_FAST_TLS_KEY
39
40    #ifdef HAVE_ARM_TLS_REGISTER
41        #define GET_TLS(reg) \
42            "mrc p15, 0, " #reg ", c13, c0, 3 \n"
43    #else
44        #define GET_TLS(reg) \
45            "mov   " #reg ", #0xFFFF0FFF      \n"  \
46            "ldr   " #reg ", [" #reg ", #-15] \n"
47    #endif
48
49    #define API_ENTRY(_api) __attribute__((naked)) _api
50
51    #define CALL_GL_EXTENSION_API(_api)                         \
52         asm volatile(                                          \
53            GET_TLS(r12)                                        \
54            "ldr   r12, [r12, %[tls]] \n"                       \
55            "cmp   r12, #0            \n"                       \
56            "ldrne r12, [r12, %[api]] \n"                       \
57            "cmpne r12, #0            \n"                       \
58            "bxne  r12                \n"                       \
59            "bx    lr                 \n"                       \
60            :                                                   \
61            : [tls] "J"(TLS_SLOT_OPENGL_API*4),                 \
62              [api] "J"(__builtin_offsetof(gl_hooks_t,          \
63                                      ext.extensions[_api]))    \
64            :                                                   \
65            );
66
67    #define GL_EXTENSION_NAME(_n)   __glExtFwd##_n
68
69    #define GL_EXTENSION(_n)                         \
70        void API_ENTRY(GL_EXTENSION_NAME(_n))() {    \
71            CALL_GL_EXTENSION_API(_n);               \
72        }
73
74
75#else
76
77    #define GL_EXTENSION_NAME(_n) NULL
78
79    #define GL_EXTENSION(_n)
80
81    #warning "eglGetProcAddress() partially supported"
82
83#endif
84
85
86#define GL_EXTENSION_LIST(name) \
87    name(0)   name(1)   name(2)   name(3)   name(4)   name(5)   name(6)   name(7)  \
88    name(8)   name(9)   name(10)  name(11)  name(12)  name(13)  name(14)  name(15) \
89    name(16)  name(17)  name(18)  name(19)  name(20)  name(21)  name(22)  name(23) \
90    name(24)  name(25)  name(26)  name(27)  name(28)  name(29)  name(30)  name(31) \
91    name(32)  name(33)  name(34)  name(35)  name(36)  name(37)  name(38)  name(39) \
92    name(40)  name(41)  name(42)  name(43)  name(44)  name(45)  name(46)  name(47) \
93    name(48)  name(49)  name(50)  name(51)  name(52)  name(53)  name(54)  name(55) \
94    name(56)  name(57)  name(58)  name(59)  name(60)  name(61)  name(62)  name(63) \
95    name(64)  name(65)  name(66)  name(67)  name(68)  name(69)  name(70)  name(71) \
96    name(72)  name(73)  name(74)  name(75)  name(76)  name(77)  name(78)  name(79) \
97    name(80)  name(81)  name(82)  name(83)  name(84)  name(85)  name(86)  name(87) \
98    name(88)  name(89)  name(90)  name(91)  name(92)  name(93)  name(94)  name(95) \
99    name(96)  name(97)  name(98)  name(99)  \
100    name(100) name(101) name(102) name(103) name(104) name(105) name(106) name(107) \
101    name(108) name(109) name(110) name(111) name(112) name(113) name(114) name(115) \
102    name(116) name(117) name(118) name(119) name(120) name(121) name(122) name(123) \
103    name(124) name(125) name(126) name(127) name(128) name(129) name(130) name(131) \
104    name(132) name(133) name(134) name(135) name(136) name(137) name(138) name(139) \
105    name(140) name(141) name(142) name(143) name(144) name(145) name(146) name(147) \
106    name(148) name(149) name(150) name(151) name(152) name(153) name(154) name(155) \
107    name(156) name(157) name(158) name(159) name(160) name(161) name(162) name(163) \
108    name(164) name(165) name(166) name(167) name(168) name(169) name(170) name(171) \
109    name(172) name(173) name(174) name(175) name(176) name(177) name(178) name(179) \
110    name(180) name(181) name(182) name(183) name(184) name(185) name(186) name(187) \
111    name(188) name(189) name(190) name(191) name(192) name(193) name(194) name(195) \
112    name(196) name(197) name(198) name(199) \
113    name(200) name(201) name(202) name(203) name(204) name(205) name(206) name(207) \
114    name(208) name(209) name(210) name(211) name(212) name(213) name(214) name(215) \
115    name(216) name(217) name(218) name(219) name(220) name(221) name(222) name(223) \
116    name(224) name(225) name(226) name(227) name(228) name(229) name(230) name(231) \
117    name(232) name(233) name(234) name(235) name(236) name(237) name(238) name(239) \
118    name(240) name(241) name(242) name(243) name(244) name(245) name(246) name(247) \
119    name(248) name(249) name(250) name(251) name(252) name(253) name(254) name(255)
120
121
122GL_EXTENSION_LIST( GL_EXTENSION )
123
124#define GL_EXTENSION_ARRAY(_n)  GL_EXTENSION_NAME(_n),
125
126extern const __eglMustCastToProperFunctionPointerType gExtensionForwarders[MAX_NUMBER_OF_GL_EXTENSIONS] = {
127        GL_EXTENSION_LIST( GL_EXTENSION_ARRAY )
128 };
129
130#undef GET_TLS
131#undef GL_EXTENSION_LIST
132#undef GL_EXTENSION_ARRAY
133#undef GL_EXTENSION_NAME
134#undef GL_EXTENSION
135#undef API_ENTRY
136#undef CALL_GL_EXTENSION_API
137
138// ----------------------------------------------------------------------------
139}; // namespace android
140// ----------------------------------------------------------------------------
141
142