1 #include "cube-egl.h"
2 #include "cube.h"
3
4 #include <kms++util/kms++util.h>
5
6 using namespace std;
7
print_egl_config(EGLDisplay dpy,EGLConfig cfg)8 static void print_egl_config(EGLDisplay dpy, EGLConfig cfg)
9 {
10 auto getconf = [dpy, cfg](EGLint a) { EGLint v = -1; eglGetConfigAttrib(dpy, cfg, a, &v); return v; };
11
12 printf("EGL Config %d: color buf %d/%d/%d/%d = %d, depth %d, stencil %d, native visualid %d, native visualtype %d\n",
13 getconf(EGL_CONFIG_ID),
14 getconf(EGL_ALPHA_SIZE),
15 getconf(EGL_RED_SIZE),
16 getconf(EGL_GREEN_SIZE),
17 getconf(EGL_BLUE_SIZE),
18 getconf(EGL_BUFFER_SIZE),
19 getconf(EGL_DEPTH_SIZE),
20 getconf(EGL_STENCIL_SIZE),
21 getconf(EGL_NATIVE_VISUAL_ID),
22 getconf(EGL_NATIVE_VISUAL_TYPE));
23 }
24
EglState(void * native_display)25 EglState::EglState(void* native_display) : EglState(native_display, 0) {}
26
EglState(void * native_display,EGLint native_visual_id)27 EglState::EglState(void* native_display, EGLint native_visual_id)
28 : m_native_visual_id(native_visual_id)
29 {
30 EGLBoolean b;
31 EGLint major, minor, n;
32
33 static const EGLint context_attribs[] = {
34 EGL_CONTEXT_CLIENT_VERSION, 2,
35 EGL_NONE
36 };
37
38 static const EGLint config_attribs[] = {
39 EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
40 EGL_RED_SIZE, 8,
41 EGL_GREEN_SIZE, 8,
42 EGL_BLUE_SIZE, 8,
43 EGL_ALPHA_SIZE, 0,
44 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
45 EGL_NONE
46 };
47
48 m_display = eglGetDisplay((EGLNativeDisplayType)native_display);
49 FAIL_IF(!m_display, "failed to get egl display");
50
51 b = eglInitialize(m_display, &major, &minor);
52 FAIL_IF(!b, "failed to initialize");
53
54 if (s_verbose) {
55 printf("Using display %p with EGL version %d.%d\n", m_display, major, minor);
56
57 printf("EGL_VENDOR: %s\n", eglQueryString(m_display, EGL_VENDOR));
58 printf("EGL_VERSION: %s\n", eglQueryString(m_display, EGL_VERSION));
59 printf("EGL_EXTENSIONS: %s\n", eglQueryString(m_display, EGL_EXTENSIONS));
60 printf("EGL_CLIENT_APIS: %s\n", eglQueryString(m_display, EGL_CLIENT_APIS));
61 }
62
63 b = eglBindAPI(EGL_OPENGL_ES_API);
64 FAIL_IF(!b, "failed to bind api EGL_OPENGL_ES_API");
65
66 EGLint numConfigs;
67 b = eglGetConfigs(m_display, nullptr, 0, &numConfigs);
68 FAIL_IF(!b, "failed to get number of configs");
69
70 if (s_verbose) {
71 EGLConfig configs[numConfigs];
72 b = eglGetConfigs(m_display, configs, numConfigs, &numConfigs);
73 FAIL_IF(!b, "failed to get configs");
74
75 printf("Available configs:\n");
76
77 for (int i = 0; i < numConfigs; ++i)
78 print_egl_config(m_display, configs[i]);
79 }
80
81 std::vector<EGLConfig> configs(numConfigs);
82 b = eglChooseConfig(m_display, config_attribs, configs.data(), numConfigs, &n);
83 FAIL_IF(!b || n < 1, "failed to choose config");
84
85 // elgChooseConfig does implement matching by EGL_NATIVE_VISUAL_ID, do a manual
86 // loop. Picks the first returned if native_visual_id is not set.
87 for (const auto& config : configs) {
88 EGLint id;
89 b = eglGetConfigAttrib(m_display, config, EGL_NATIVE_VISUAL_ID, &id);
90 if (!b) {
91 printf("failed to get native visual id\n");
92 continue;
93 }
94
95 if (id == native_visual_id || !native_visual_id) {
96 m_config = config;
97 break;
98 }
99 }
100
101 if (s_verbose) {
102 printf("Chosen config:\n");
103 print_egl_config(m_display, m_config);
104 }
105
106 m_context = eglCreateContext(m_display, m_config, EGL_NO_CONTEXT, context_attribs);
107 FAIL_IF(!m_context, "failed to create context");
108
109 EGLBoolean ok = eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, m_context);
110 FAIL_IF(!ok, "eglMakeCurrent() failed");
111 }
112
~EglState()113 EglState::~EglState()
114 {
115 eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
116 eglTerminate(m_display);
117 }
118
EglSurface(const EglState & egl,void * native_window)119 EglSurface::EglSurface(const EglState& egl, void* native_window)
120 : egl(egl)
121 {
122 esurface = eglCreateWindowSurface(egl.display(), egl.config(), (EGLNativeWindowType)native_window, NULL);
123 FAIL_IF(esurface == EGL_NO_SURFACE, "failed to create egl surface");
124 }
125
~EglSurface()126 EglSurface::~EglSurface()
127 {
128 eglDestroySurface(egl.display(), esurface);
129 }
130
make_current()131 void EglSurface::make_current()
132 {
133 EGLBoolean ok = eglMakeCurrent(egl.display(), esurface, esurface, egl.context());
134 FAIL_IF(!ok, "eglMakeCurrent() failed");
135 }
136
swap_buffers()137 void EglSurface::swap_buffers()
138 {
139 EGLBoolean ok = eglSwapBuffers(egl.display(), esurface);
140 FAIL_IF(!ok, "eglMakeCurrent() failed");
141 }
142