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 // ----------------------------------------------------------------------------
35 // extensions for the framework
36 // ----------------------------------------------------------------------------
37
38 extern "C" {
39 GL_API void GL_APIENTRY glColorPointerBounds(GLint size, GLenum type, GLsizei stride,
40 const GLvoid *ptr, GLsizei count);
41 GL_API void GL_APIENTRY glNormalPointerBounds(GLenum type, GLsizei stride,
42 const GLvoid *pointer, GLsizei count);
43 GL_API void GL_APIENTRY glTexCoordPointerBounds(GLint size, GLenum type,
44 GLsizei stride, const GLvoid *pointer, GLsizei count);
45 GL_API void GL_APIENTRY glVertexPointerBounds(GLint size, GLenum type,
46 GLsizei stride, const GLvoid *pointer, GLsizei count);
47 GL_API void GL_APIENTRY glPointSizePointerOESBounds(GLenum type,
48 GLsizei stride, const GLvoid *pointer, GLsizei count);
49 GL_API void GL_APIENTRY glMatrixIndexPointerOESBounds(GLint size, GLenum type,
50 GLsizei stride, const GLvoid *pointer, GLsizei count);
51 GL_API void GL_APIENTRY glWeightPointerOESBounds(GLint size, GLenum type,
52 GLsizei stride, const GLvoid *pointer, GLsizei count);
53 }
54
glColorPointerBounds(GLint size,GLenum type,GLsizei stride,const GLvoid * ptr,GLsizei count)55 void glColorPointerBounds(GLint size, GLenum type, GLsizei stride,
56 const GLvoid *ptr, GLsizei count) {
57 glColorPointer(size, type, stride, ptr);
58 }
glNormalPointerBounds(GLenum type,GLsizei stride,const GLvoid * pointer,GLsizei count)59 void glNormalPointerBounds(GLenum type, GLsizei stride,
60 const GLvoid *pointer, GLsizei count) {
61 glNormalPointer(type, stride, pointer);
62 }
glTexCoordPointerBounds(GLint size,GLenum type,GLsizei stride,const GLvoid * pointer,GLsizei count)63 void glTexCoordPointerBounds(GLint size, GLenum type,
64 GLsizei stride, const GLvoid *pointer, GLsizei count) {
65 glTexCoordPointer(size, type, stride, pointer);
66 }
glVertexPointerBounds(GLint size,GLenum type,GLsizei stride,const GLvoid * pointer,GLsizei count)67 void glVertexPointerBounds(GLint size, GLenum type,
68 GLsizei stride, const GLvoid *pointer, GLsizei count) {
69 glVertexPointer(size, type, stride, pointer);
70 }
71
glPointSizePointerOESBounds(GLenum type,GLsizei stride,const GLvoid * pointer,GLsizei count)72 void GL_APIENTRY glPointSizePointerOESBounds(GLenum type,
73 GLsizei stride, const GLvoid *pointer, GLsizei count) {
74 glPointSizePointerOES(type, stride, pointer);
75 }
76
glMatrixIndexPointerOESBounds(GLint size,GLenum type,GLsizei stride,const GLvoid * pointer,GLsizei count)77 GL_API void GL_APIENTRY glMatrixIndexPointerOESBounds(GLint size, GLenum type,
78 GLsizei stride, const GLvoid *pointer, GLsizei count) {
79 glMatrixIndexPointerOES(size, type, stride, pointer);
80 }
81
glWeightPointerOESBounds(GLint size,GLenum type,GLsizei stride,const GLvoid * pointer,GLsizei count)82 GL_API void GL_APIENTRY glWeightPointerOESBounds(GLint size, GLenum type,
83 GLsizei stride, const GLvoid *pointer, GLsizei count) {
84 glWeightPointerOES(size, type, stride, pointer);
85 }
86
87 // ----------------------------------------------------------------------------
88 // Actual GL entry-points
89 // ----------------------------------------------------------------------------
90
91 #undef API_ENTRY
92 #undef CALL_GL_API
93 #undef CALL_GL_API_RETURN
94
95 #if defined(__arm__) && !USE_SLOW_BINDING
96
97 #define GET_TLS(reg) "mrc p15, 0, " #reg ", c13, c0, 3 \n"
98
99 #define API_ENTRY(_api) __attribute__((noinline)) _api
100
101 #define CALL_GL_API(_api, ...) \
102 asm volatile( \
103 GET_TLS(r12) \
104 "ldr r12, [r12, %[tls]] \n" \
105 "cmp r12, #0 \n" \
106 "ldrne pc, [r12, %[api]] \n" \
107 : \
108 : [tls] "J"(TLS_SLOT_OPENGL_API*4), \
109 [api] "J"(__builtin_offsetof(gl_hooks_t, gl._api)) \
110 : \
111 );
112
113 #elif defined(__mips__) && !USE_SLOW_BINDING
114
115 #define API_ENTRY(_api) __attribute__((noinline)) _api
116
117 #define CALL_GL_API(_api, ...) \
118 register unsigned int _t0 asm("t0"); \
119 register unsigned int _fn asm("t1"); \
120 register unsigned int _tls asm("v1"); \
121 register unsigned int _v0 asm("v0"); \
122 asm volatile( \
123 ".set push\n\t" \
124 ".set noreorder\n\t" \
125 ".set mips32r2\n\t" \
126 "rdhwr %[tls], $29\n\t" \
127 "lw %[t0], %[OPENGL_API](%[tls])\n\t" \
128 "beqz %[t0], 1f\n\t" \
129 " move %[fn], $ra\n\t" \
130 "lw %[fn], %[API](%[t0])\n\t" \
131 "movz %[fn], $ra, %[fn]\n\t" \
132 "1:\n\t" \
133 "j %[fn]\n\t" \
134 " move %[v0], $0\n\t" \
135 ".set pop\n\t" \
136 : [fn] "=c"(_fn), \
137 [tls] "=&r"(_tls), \
138 [t0] "=&r"(_t0), \
139 [v0] "=&r"(_v0) \
140 : [OPENGL_API] "I"(TLS_SLOT_OPENGL_API*4), \
141 [API] "I"(__builtin_offsetof(gl_hooks_t, gl._api)) \
142 : \
143 );
144
145 #else
146
147 #define API_ENTRY(_api) _api
148
149 #define CALL_GL_API(_api, ...) \
150 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \
151 if (_c) return _c->_api(__VA_ARGS__);
152
153 #endif
154
155 #define CALL_GL_API_RETURN(_api, ...) \
156 CALL_GL_API(_api, __VA_ARGS__) \
157 return 0;
158
159
160 extern "C" {
161 #include "gl_api.in"
162 #include "glext_api.in"
163 }
164
165 #undef API_ENTRY
166 #undef CALL_GL_API
167 #undef CALL_GL_API_RETURN
168
169 /*
170 * glGetString() is special because we expose some extensions in the wrapper
171 */
172
173 extern "C" const GLubyte * __glGetString(GLenum name);
174
glGetString(GLenum name)175 const GLubyte * glGetString(GLenum name) {
176 const GLubyte * ret = egl_get_string_for_current_context(name);
177 if (ret == NULL) {
178 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl;
179 ret = _c->glGetString(name);
180 }
181 return ret;
182 }
183