kmscube/cube-egl.cpp

   1 #include "cube-egl.h"
   2 #include "cube.h"
   3
   4 #include <kms++util/kms++util.h>
   5
   6 using namespace std;
   7
   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
  25 EglState::EglState(void *native_display)
  26 {
  27         EGLBoolean b;
  28         EGLint major, minor, n;
  29
  30         static const EGLint context_attribs[] = {
  31                 EGL_CONTEXT_CLIENT_VERSION, 2,
  32                 EGL_NONE
  33         };
  34
  35         static const EGLint config_attribs[] = {
  36                 EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
  37                 EGL_RED_SIZE, 8,
  38                 EGL_GREEN_SIZE, 8,
  39                 EGL_BLUE_SIZE, 8,
  40                 EGL_ALPHA_SIZE, 0,
  41                 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
  42                 EGL_NONE
  43         };
  44
  45         m_display = eglGetDisplay((EGLNativeDisplayType)native_display);
  46         FAIL_IF(!m_display, "failed to get egl display");
  47
  48         b = eglInitialize(m_display, &major, &minor);
  49         FAIL_IF(!b, "failed to initialize");
  50
  51         if (s_verbose) {
  52                 printf("Using display %p with EGL version %d.%d\n", m_display, major, minor);
  53
  54                 printf("EGL_VENDOR:      %s\n", eglQueryString(m_display, EGL_VENDOR));
  55                 printf("EGL_VERSION:     %s\n", eglQueryString(m_display, EGL_VERSION));
  56                 printf("EGL_EXTENSIONS:  %s\n", eglQueryString(m_display, EGL_EXTENSIONS));
  57                 printf("EGL_CLIENT_APIS: %s\n", eglQueryString(m_display, EGL_CLIENT_APIS));
  58         }
  59
  60         b = eglBindAPI(EGL_OPENGL_ES_API);
  61         FAIL_IF(!b, "failed to bind api EGL_OPENGL_ES_API");
  62
  63
  64         if (s_verbose) {
  65                 EGLint numConfigs;
  66                 b = eglGetConfigs(m_display, nullptr, 0, &numConfigs);
  67                 FAIL_IF(!b, "failed to get number of configs");
  68
  69                 EGLConfig configs[numConfigs];
  70                 b = eglGetConfigs(m_display, configs, numConfigs, &numConfigs);
  71
  72                 printf("Available configs:\n");
  73
  74                 for (int i = 0; i < numConfigs; ++i)
  75                         print_egl_config(m_display, configs[i]);
  76         }
  77
  78         b = eglChooseConfig(m_display, config_attribs, &m_config, 1, &n);
  79         FAIL_IF(!b || n != 1, "failed to choose config");
  80
  81         if (s_verbose) {
  82                 printf("Chosen config:\n");
  83                 print_egl_config(m_display, m_config);
  84         }
  85
  86         m_context = eglCreateContext(m_display, m_config, EGL_NO_CONTEXT, context_attribs);
  87         FAIL_IF(!m_context, "failed to create context");
  88
  89         EGLBoolean ok = eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, m_context);
  90         FAIL_IF(!ok, "eglMakeCurrent() failed");
  91 }
  92
  93 EglState::~EglState()
  94 {
  95         eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
  96         eglTerminate(m_display);
  97 }
  98
  99 EglSurface::EglSurface(const EglState &egl, void *native_window)
 100         : egl(egl)
 101 {
 102         esurface = eglCreateWindowSurface(egl.display(), egl.config(), (EGLNativeWindowType)native_window, NULL);
 103         FAIL_IF(esurface == EGL_NO_SURFACE, "failed to create egl surface");
 104 }
 105
 106 EglSurface::~EglSurface()
 107 {
 108         eglDestroySurface(egl.display(), esurface);
 109 }
 110
 111 void EglSurface::make_current()
 112 {
 113         EGLBoolean ok = eglMakeCurrent(egl.display(), esurface, esurface, egl.context());
 114         FAIL_IF(!ok, "eglMakeCurrent() failed");
 115 }
 116
 117 void EglSurface::swap_buffers()
 118 {
 119         EGLBoolean ok = eglSwapBuffers(egl.display(), esurface);
 120         FAIL_IF(!ok, "eglMakeCurrent() failed");
 121 }