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
glColorPointerBounds(GLint size,GLenum type,GLsizei stride,const GLvoid * ptr,GLsizei count)58 void glColorPointerBounds(GLint size, GLenum type, GLsizei stride,
59 const GLvoid *ptr, GLsizei count) {
60 glColorPointer(size, type, stride, ptr);
61 }
glNormalPointerBounds(GLenum type,GLsizei stride,const GLvoid * pointer,GLsizei count)62 void glNormalPointerBounds(GLenum type, GLsizei stride,
63 const GLvoid *pointer, GLsizei count) {
64 glNormalPointer(type, stride, pointer);
65 }
glTexCoordPointerBounds(GLint size,GLenum type,GLsizei stride,const GLvoid * pointer,GLsizei count)66 void glTexCoordPointerBounds(GLint size, GLenum type,
67 GLsizei stride, const GLvoid *pointer, GLsizei count) {
68 glTexCoordPointer(size, type, stride, pointer);
69 }
glVertexPointerBounds(GLint size,GLenum type,GLsizei stride,const GLvoid * pointer,GLsizei count)70 void glVertexPointerBounds(GLint size, GLenum type,
71 GLsizei stride, const GLvoid *pointer, GLsizei count) {
72 glVertexPointer(size, type, stride, pointer);
73 }
74
glPointSizePointerOESBounds(GLenum type,GLsizei stride,const GLvoid * pointer,GLsizei count)75 void GL_APIENTRY glPointSizePointerOESBounds(GLenum type,
76 GLsizei stride, const GLvoid *pointer, GLsizei count) {
77 glPointSizePointerOES(type, stride, pointer);
78 }
79
glMatrixIndexPointerOESBounds(GLint size,GLenum type,GLsizei stride,const GLvoid * pointer,GLsizei count)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
glWeightPointerOESBounds(GLint size,GLenum type,GLsizei stride,const GLvoid * pointer,GLsizei count)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
glGetString(GLenum name)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