1 /*
2 * Copyright (C) 2013 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 #define LOG_TAG "OpenGLRenderer"
18
19 #include <GLES2/gl2.h>
20 #include <GLES2/gl2ext.h>
21
22 #include <EGL/egl.h>
23 #include <EGL/eglext.h>
24
25 #include <utils/Log.h>
26
27 #include "Debug.h"
28 #include "Extensions.h"
29 #include "Properties.h"
30
31 namespace android {
32
33 using namespace uirenderer;
34 ANDROID_SINGLETON_STATIC_INSTANCE(Extensions);
35
36 namespace uirenderer {
37
38 ///////////////////////////////////////////////////////////////////////////////
39 // Defines
40 ///////////////////////////////////////////////////////////////////////////////
41
42 // Debug
43 #if DEBUG_EXTENSIONS
44 #define EXT_LOGD(...) ALOGD(__VA_ARGS__)
45 #else
46 #define EXT_LOGD(...)
47 #endif
48
49 ///////////////////////////////////////////////////////////////////////////////
50 // Constructors
51 ///////////////////////////////////////////////////////////////////////////////
52
Extensions()53 Extensions::Extensions(): Singleton<Extensions>() {
54 // Query GL extensions
55 findExtensions((const char*) glGetString(GL_EXTENSIONS), mGlExtensionList);
56 mHasNPot = hasGlExtension("GL_OES_texture_npot");
57 mHasFramebufferFetch = hasGlExtension("GL_NV_shader_framebuffer_fetch");
58 mHasDiscardFramebuffer = hasGlExtension("GL_EXT_discard_framebuffer");
59 mHasDebugMarker = hasGlExtension("GL_EXT_debug_marker");
60 mHasDebugLabel = hasGlExtension("GL_EXT_debug_label");
61 mHasTiledRendering = hasGlExtension("GL_QCOM_tiled_rendering");
62 mHas1BitStencil = hasGlExtension("GL_OES_stencil1");
63 mHas4BitStencil = hasGlExtension("GL_OES_stencil4");
64
65 // Query EGL extensions
66 findExtensions(eglQueryString(eglGetCurrentDisplay(), EGL_EXTENSIONS), mEglExtensionList);
67
68 char property[PROPERTY_VALUE_MAX];
69 if (property_get(PROPERTY_DEBUG_NV_PROFILING, property, NULL) > 0) {
70 mHasNvSystemTime = !strcmp(property, "true") && hasEglExtension("EGL_NV_system_time");
71 } else {
72 mHasNvSystemTime = false;
73 }
74
75 const char* version = (const char*) glGetString(GL_VERSION);
76
77 // Section 6.1.5 of the OpenGL ES specification indicates the GL version
78 // string strictly follows this format:
79 //
80 // OpenGL<space>ES<space><version number><space><vendor-specific information>
81 //
82 // In addition section 6.1.5 describes the version number thusly:
83 //
84 // "The version number is either of the form major number.minor number or
85 // major number.minor number.release number, where the numbers all have one
86 // or more digits. The release number and vendor specific information are
87 // optional."
88
89 if (sscanf(version, "OpenGL ES %d.%d", &mVersionMajor, &mVersionMinor) != 2) {
90 // If we cannot parse the version number, assume OpenGL ES 2.0
91 mVersionMajor = 2;
92 mVersionMinor = 0;
93 }
94 }
95
~Extensions()96 Extensions::~Extensions() {
97 }
98
99 ///////////////////////////////////////////////////////////////////////////////
100 // Methods
101 ///////////////////////////////////////////////////////////////////////////////
102
hasGlExtension(const char * extension) const103 bool Extensions::hasGlExtension(const char* extension) const {
104 const String8 s(extension);
105 return mGlExtensionList.indexOf(s) >= 0;
106 }
107
hasEglExtension(const char * extension) const108 bool Extensions::hasEglExtension(const char* extension) const {
109 const String8 s(extension);
110 return mEglExtensionList.indexOf(s) >= 0;
111 }
112
findExtensions(const char * extensions,SortedVector<String8> & list) const113 void Extensions::findExtensions(const char* extensions, SortedVector<String8>& list) const {
114 const char* current = extensions;
115 const char* head = current;
116 EXT_LOGD("Available extensions:");
117 do {
118 head = strchr(current, ' ');
119 String8 s(current, head ? head - current : strlen(current));
120 if (s.length()) {
121 list.add(s);
122 EXT_LOGD(" %s", s.string());
123 }
124 current = head + 1;
125 } while (head);
126 }
127
dump() const128 void Extensions::dump() const {
129 ALOGD("%s", (const char*) glGetString(GL_VERSION));
130 ALOGD("Supported GL extensions:\n%s", (const char*) glGetString(GL_EXTENSIONS));
131 ALOGD("Supported EGL extensions:\n%s", eglQueryString(eglGetCurrentDisplay(), EGL_EXTENSIONS));
132 }
133
134 }; // namespace uirenderer
135 }; // namespace android
136