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 <errno.h>
19#include <string.h>
20#include <sys/ioctl.h>
21
22#include <log/log.h>
23#include <cutils/properties.h>
24
25#include <GLES/gl.h>
26#include <GLES/glext.h>
27
28#include "../hooks.h"
29#include "../egl_impl.h"
30
31using namespace android;
32
33// ----------------------------------------------------------------------------
34// extensions for the framework
35// ----------------------------------------------------------------------------
36
37extern "C" {
38GL_API void GL_APIENTRY glColorPointerBounds(GLint size, GLenum type, GLsizei stride,
39        const GLvoid *ptr, GLsizei count);
40GL_API void GL_APIENTRY glNormalPointerBounds(GLenum type, GLsizei stride,
41        const GLvoid *pointer, GLsizei count);
42GL_API void GL_APIENTRY glTexCoordPointerBounds(GLint size, GLenum type,
43        GLsizei stride, const GLvoid *pointer, GLsizei count);
44GL_API void GL_APIENTRY glVertexPointerBounds(GLint size, GLenum type,
45        GLsizei stride, const GLvoid *pointer, GLsizei count);
46GL_API void GL_APIENTRY glPointSizePointerOESBounds(GLenum type,
47        GLsizei stride, const GLvoid *pointer, GLsizei count);
48GL_API void GL_APIENTRY glMatrixIndexPointerOESBounds(GLint size, GLenum type,
49        GLsizei stride, const GLvoid *pointer, GLsizei count);
50GL_API void GL_APIENTRY glWeightPointerOESBounds(GLint size, GLenum type,
51        GLsizei stride, const GLvoid *pointer, GLsizei count);
52}
53
54void glColorPointerBounds(GLint size, GLenum type, GLsizei stride,
55        const GLvoid *ptr, GLsizei /*count*/) {
56    glColorPointer(size, type, stride, ptr);
57}
58void glNormalPointerBounds(GLenum type, GLsizei stride,
59        const GLvoid *pointer, GLsizei /*count*/) {
60    glNormalPointer(type, stride, pointer);
61}
62void glTexCoordPointerBounds(GLint size, GLenum type,
63        GLsizei stride, const GLvoid *pointer, GLsizei /*count*/) {
64    glTexCoordPointer(size, type, stride, pointer);
65}
66void glVertexPointerBounds(GLint size, GLenum type,
67        GLsizei stride, const GLvoid *pointer, GLsizei /*count*/) {
68    glVertexPointer(size, type, stride, pointer);
69}
70
71void GL_APIENTRY glPointSizePointerOESBounds(GLenum type,
72        GLsizei stride, const GLvoid *pointer, GLsizei /*count*/) {
73    glPointSizePointerOES(type, stride, pointer);
74}
75
76GL_API void GL_APIENTRY glMatrixIndexPointerOESBounds(GLint size, GLenum type,
77        GLsizei stride, const GLvoid *pointer, GLsizei /*count*/) {
78    glMatrixIndexPointerOES(size, type, stride, pointer);
79}
80
81GL_API void GL_APIENTRY glWeightPointerOESBounds(GLint size, GLenum type,
82        GLsizei stride, const GLvoid *pointer, GLsizei /*count*/) {
83    glWeightPointerOES(size, type, stride, pointer);
84}
85
86// ----------------------------------------------------------------------------
87// Actual GL entry-points
88// ----------------------------------------------------------------------------
89
90#undef API_ENTRY
91#undef CALL_GL_API
92#undef CALL_GL_API_INTERNAL_CALL
93#undef CALL_GL_API_INTERNAL_SET_RETURN_VALUE
94#undef CALL_GL_API_INTERNAL_DO_RETURN
95#undef CALL_GL_API_RETURN
96
97#if USE_SLOW_BINDING
98
99    #define API_ENTRY(_api) _api
100
101    #define CALL_GL_API_INTERNAL_CALL(_api, ...)                         \
102        gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl;  \
103        if (_c) return _c->_api(__VA_ARGS__);
104
105    #define CALL_GL_API_INTERNAL_SET_RETURN_VALUE return 0;
106
107    // This stays blank, since void functions will implicitly return, and
108    // all of the other functions will return 0 based on the previous macro.
109    #define CALL_GL_API_INTERNAL_DO_RETURN
110
111#elif defined(__arm__)
112
113    #define GET_TLS(reg) "mrc p15, 0, " #reg ", c13, c0, 3 \n"
114
115    #define API_ENTRY(_api) __attribute__((naked,noinline)) _api
116
117    #define CALL_GL_API_INTERNAL_CALL(_api, ...)                 \
118        asm volatile(                                            \
119            GET_TLS(r12)                                         \
120            "ldr   r12, [r12, %[tls]] \n"                        \
121            "cmp   r12, #0            \n"                        \
122            "ldrne pc,  [r12, %[api]] \n"                        \
123            :                                                    \
124            : [tls] "J"(TLS_SLOT_OPENGL_API*4),                  \
125              [api] "J"(__builtin_offsetof(gl_hooks_t, gl._api)) \
126            : "r0", "r1", "r2", "r3", "r12"                      \
127        );
128
129    #define CALL_GL_API_INTERNAL_SET_RETURN_VALUE \
130        asm volatile(                             \
131            "mov r0, #0 \n"                       \
132            :                                     \
133            :                                     \
134            : "r0"                                \
135        );
136
137
138    #define CALL_GL_API_INTERNAL_DO_RETURN \
139        asm volatile(                      \
140            "bx lr \n"                     \
141            :                              \
142            :                              \
143            : "r0"                         \
144        );
145
146#elif defined(__aarch64__)
147
148    #define API_ENTRY(_api) __attribute__((naked,noinline)) _api
149
150    #define CALL_GL_API_INTERNAL_CALL(_api, ...)                    \
151        asm volatile(                                               \
152            "mrs x16, tpidr_el0\n"                                  \
153            "ldr x16, [x16, %[tls]]\n"                              \
154            "cbz x16, 1f\n"                                         \
155            "ldr x16, [x16, %[api]]\n"                              \
156            "br  x16\n"                                             \
157            "1:\n"                                                  \
158            :                                                       \
159            : [tls] "i" (TLS_SLOT_OPENGL_API * sizeof(void*)),      \
160              [api] "i" (__builtin_offsetof(gl_hooks_t, gl._api))   \
161            : "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7", "x16" \
162        );
163
164    #define CALL_GL_API_INTERNAL_SET_RETURN_VALUE \
165        asm volatile(                             \
166            "mov w0, wzr \n"                      \
167            :                                     \
168            :                                     \
169            : "w0"                                \
170        );
171
172    #define CALL_GL_API_INTERNAL_DO_RETURN \
173        asm volatile(                      \
174            "ret \n"                       \
175            :                              \
176            :                              \
177            :                              \
178        );
179
180#elif defined(__i386__)
181
182    #define API_ENTRY(_api) __attribute__((naked,noinline)) _api
183
184    #define CALL_GL_API_INTERNAL_CALL(_api, ...)                    \
185        __asm__ volatile(                                           \
186            "mov %%gs:0, %%eax\n"                                   \
187            "mov %P[tls](%%eax), %%eax\n"                           \
188            "test %%eax, %%eax\n"                                   \
189            "je 1f\n"                                               \
190            "jmp *%P[api](%%eax)\n"                                 \
191            "1:\n"                                                  \
192            :                                                       \
193            : [tls] "i" (TLS_SLOT_OPENGL_API*sizeof(void*)),        \
194              [api] "i" (__builtin_offsetof(gl_hooks_t, gl._api))   \
195            : "cc", "%eax"                                          \
196        );
197
198    #define CALL_GL_API_INTERNAL_SET_RETURN_VALUE \
199        __asm__ volatile(                         \
200            "xor %%eax, %%eax\n"                  \
201            :                                     \
202            :                                     \
203            : "%eax"                              \
204        );
205
206    #define CALL_GL_API_INTERNAL_DO_RETURN \
207        __asm__ volatile(                  \
208            "ret\n"                        \
209            :                              \
210            :                              \
211            :                              \
212        );
213
214#elif defined(__x86_64__)
215
216    #define API_ENTRY(_api) __attribute__((naked,noinline)) _api
217
218    #define CALL_GL_API_INTERNAL_CALL(_api, ...)                    \
219        __asm__ volatile(                                           \
220            "mov %%fs:0, %%rax\n"                                   \
221            "mov %P[tls](%%rax), %%rax\n"                           \
222            "test %%rax, %%rax\n"                                   \
223            "je 1f\n"                                               \
224            "jmp *%P[api](%%rax)\n"                                 \
225            "1:\n"                                                  \
226            :                                                       \
227            : [tls] "i" (TLS_SLOT_OPENGL_API*sizeof(void*)),        \
228              [api] "i" (__builtin_offsetof(gl_hooks_t, gl._api))   \
229            : "cc", "%rdi", "%rsi", "%rdx", "%rcx", "%r8", "%r9",   \
230              "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", \
231              "%xmm6", "%xmm7"                                      \
232        );
233
234    #define CALL_GL_API_INTERNAL_SET_RETURN_VALUE \
235        __asm__ volatile(                         \
236            "xor %%eax, %%eax\n"                  \
237            :                                     \
238            :                                     \
239            : "%eax"                              \
240        );
241
242    #define CALL_GL_API_INTERNAL_DO_RETURN \
243        __asm__ volatile(                  \
244            "retq\n"                       \
245            :                              \
246            :                              \
247            :                              \
248        );
249
250#elif defined(__mips64)
251
252    #define API_ENTRY(_api) __attribute__((naked,noinline)) _api
253
254    // t0:  $12
255    // fn:  $25
256    // tls: $3
257    // v0:  $2
258    #define CALL_GL_API_INTERNAL_CALL(_api, ...)                  \
259        asm volatile(                                             \
260            ".set  push\n\t"                                      \
261            ".set  noreorder\n\t"                                 \
262            "rdhwr $3, $29\n\t"                                   \
263            "ld    $12, %[OPENGL_API]($3)\n\t"                    \
264            "beqz  $12, 1f\n\t"                                   \
265            " move $25, $ra\n\t"                                  \
266            "ld    $12, %[API]($12)\n\t"                          \
267            "beqz  $12, 1f\n\t"                                   \
268            " nop\n\t"                                            \
269            "move  $25, $12\n\t"                                  \
270            "1:\n\t"                                              \
271            "jalr  $0, $25\n\t"                                   \
272            " move $2, $0\n\t"                                    \
273            ".set  pop\n\t"                                       \
274            :                                                     \
275            : [OPENGL_API] "I"(TLS_SLOT_OPENGL_API*sizeof(void*)),\
276              [API] "I"(__builtin_offsetof(gl_hooks_t, gl._api))  \
277            : "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9",     \
278              "$10", "$11", "$12", "$25"                          \
279        );
280
281    #define CALL_GL_API_INTERNAL_SET_RETURN_VALUE
282    #define CALL_GL_API_INTERNAL_DO_RETURN
283
284#elif defined(__mips__)
285
286    #define API_ENTRY(_api) __attribute__((naked,noinline)) _api
287
288    // t0:  $8
289    // fn:  $25
290    // tls: $3
291    // v0:  $2
292    #define CALL_GL_API_INTERNAL_CALL(_api, ...)                 \
293        asm volatile(                                            \
294            ".set  push\n\t"                                     \
295            ".set  noreorder\n\t"                                \
296            ".set  mips32r2\n\t"                                 \
297            "rdhwr $3, $29\n\t"                                  \
298            "lw    $3, %[OPENGL_API]($3)\n\t"                    \
299            "beqz  $3, 1f\n\t"                                   \
300            " move $25,$ra\n\t"                                  \
301            "lw    $3, %[API]($3)\n\t"                           \
302            "beqz  $3, 1f\n\t"                                   \
303            " nop\n\t"                                           \
304            "move  $25, $3\n\t"                                  \
305            "1:\n\t"                                             \
306            "jalr  $0, $25\n\t"                                  \
307            " move $2, $0\n\t"                                   \
308            ".set  pop\n\t"                                      \
309            :                                                    \
310            : [OPENGL_API] "I"(TLS_SLOT_OPENGL_API*4),           \
311              [API] "I"(__builtin_offsetof(gl_hooks_t, gl._api)) \
312            : "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$25"    \
313        );
314
315    #define CALL_GL_API_INTERNAL_SET_RETURN_VALUE
316    #define CALL_GL_API_INTERNAL_DO_RETURN
317
318#endif
319
320#define CALL_GL_API(_api, ...) \
321    CALL_GL_API_INTERNAL_CALL(_api, __VA_ARGS__) \
322    CALL_GL_API_INTERNAL_DO_RETURN
323
324#define CALL_GL_API_RETURN(_api, ...) \
325    CALL_GL_API_INTERNAL_CALL(_api, __VA_ARGS__) \
326    CALL_GL_API_INTERNAL_SET_RETURN_VALUE \
327    CALL_GL_API_INTERNAL_DO_RETURN
328
329extern "C" {
330#pragma GCC diagnostic ignored "-Wunused-parameter"
331#include "gl_api.in"
332#include "glext_api.in"
333#pragma GCC diagnostic warning "-Wunused-parameter"
334}
335
336#undef API_ENTRY
337#undef CALL_GL_API
338#undef CALL_GL_API_INTERNAL_CALL
339#undef CALL_GL_API_INTERNAL_SET_RETURN_VALUE
340#undef CALL_GL_API_INTERNAL_DO_RETURN
341#undef CALL_GL_API_RETURN
342
343/*
344 * glGetString() is special because we expose some extensions in the wrapper
345 */
346
347extern "C" const GLubyte * __glGetString(GLenum name);
348
349const GLubyte * glGetString(GLenum name) {
350    const GLubyte * ret = egl_get_string_for_current_context(name);
351    if (ret == NULL) {
352        gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl;
353        ret = _c->glGetString(name);
354    }
355    return ret;
356}
357