1 /*
2 * Copyright (C) 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
18 #ifndef ANDROID_UI_EGLUTILS_H
19 #define ANDROID_UI_EGLUTILS_H
20
21 #include <stdint.h>
22 #include <stdlib.h>
23
24 #include <system/window.h>
25 #include <utils/Errors.h>
26 #include <EGL/egl.h>
27
28
29 // ----------------------------------------------------------------------------
30 namespace android {
31 // ----------------------------------------------------------------------------
32
33 class EGLUtils
34 {
35 public:
36
37 static inline const char *strerror(EGLint err);
38
39 static inline status_t selectConfigForPixelFormat(
40 EGLDisplay dpy,
41 EGLint const* attrs,
42 int32_t format,
43 EGLConfig* outConfig);
44
45 static inline status_t selectConfigForNativeWindow(
46 EGLDisplay dpy,
47 EGLint const* attrs,
48 EGLNativeWindowType window,
49 EGLConfig* outConfig);
50 };
51
52 // ----------------------------------------------------------------------------
53
strerror(EGLint err)54 const char *EGLUtils::strerror(EGLint err)
55 {
56 switch (err){
57 case EGL_SUCCESS: return "EGL_SUCCESS";
58 case EGL_NOT_INITIALIZED: return "EGL_NOT_INITIALIZED";
59 case EGL_BAD_ACCESS: return "EGL_BAD_ACCESS";
60 case EGL_BAD_ALLOC: return "EGL_BAD_ALLOC";
61 case EGL_BAD_ATTRIBUTE: return "EGL_BAD_ATTRIBUTE";
62 case EGL_BAD_CONFIG: return "EGL_BAD_CONFIG";
63 case EGL_BAD_CONTEXT: return "EGL_BAD_CONTEXT";
64 case EGL_BAD_CURRENT_SURFACE: return "EGL_BAD_CURRENT_SURFACE";
65 case EGL_BAD_DISPLAY: return "EGL_BAD_DISPLAY";
66 case EGL_BAD_MATCH: return "EGL_BAD_MATCH";
67 case EGL_BAD_NATIVE_PIXMAP: return "EGL_BAD_NATIVE_PIXMAP";
68 case EGL_BAD_NATIVE_WINDOW: return "EGL_BAD_NATIVE_WINDOW";
69 case EGL_BAD_PARAMETER: return "EGL_BAD_PARAMETER";
70 case EGL_BAD_SURFACE: return "EGL_BAD_SURFACE";
71 case EGL_CONTEXT_LOST: return "EGL_CONTEXT_LOST";
72 default: return "UNKNOWN";
73 }
74 }
75
selectConfigForPixelFormat(EGLDisplay dpy,EGLint const * attrs,int32_t format,EGLConfig * outConfig)76 status_t EGLUtils::selectConfigForPixelFormat(
77 EGLDisplay dpy,
78 EGLint const* attrs,
79 int32_t format,
80 EGLConfig* outConfig)
81 {
82 EGLint numConfigs = -1, n=0;
83
84 if (!attrs)
85 return BAD_VALUE;
86
87 if (outConfig == NULL)
88 return BAD_VALUE;
89
90 // Get all the "potential match" configs...
91 if (eglGetConfigs(dpy, NULL, 0, &numConfigs) == EGL_FALSE)
92 return BAD_VALUE;
93
94 EGLConfig* const configs = (EGLConfig*)malloc(sizeof(EGLConfig)*numConfigs);
95 if (eglChooseConfig(dpy, attrs, configs, numConfigs, &n) == EGL_FALSE) {
96 free(configs);
97 return BAD_VALUE;
98 }
99
100 int i;
101 EGLConfig config = NULL;
102 for (i=0 ; i<n ; i++) {
103 EGLint nativeVisualId = 0;
104 eglGetConfigAttrib(dpy, configs[i], EGL_NATIVE_VISUAL_ID, &nativeVisualId);
105 if (nativeVisualId>0 && format == nativeVisualId) {
106 config = configs[i];
107 break;
108 }
109 }
110
111 free(configs);
112
113 if (i<n) {
114 *outConfig = config;
115 return NO_ERROR;
116 }
117
118 return NAME_NOT_FOUND;
119 }
120
selectConfigForNativeWindow(EGLDisplay dpy,EGLint const * attrs,EGLNativeWindowType window,EGLConfig * outConfig)121 status_t EGLUtils::selectConfigForNativeWindow(
122 EGLDisplay dpy,
123 EGLint const* attrs,
124 EGLNativeWindowType window,
125 EGLConfig* outConfig)
126 {
127 int err;
128 int format;
129
130 if (!window)
131 return BAD_VALUE;
132
133 if ((err = window->query(window, NATIVE_WINDOW_FORMAT, &format)) < 0) {
134 return err;
135 }
136
137 return selectConfigForPixelFormat(dpy, attrs, format, outConfig);
138 }
139
140 // ----------------------------------------------------------------------------
141 }; // namespace android
142 // ----------------------------------------------------------------------------
143
144 #endif /* ANDROID_UI_EGLUTILS_H */
145