kmscube/cube-egl.cpp

   1 #include "cube-egl.h"
   2 #include "cube.h"
   3
   4 #include <kms++util.h>
   5
   6 using namespace std;
   7
   8 EglState::EglState(void *native_display)
   9 {
  10         EGLBoolean b;
  11         EGLint major, minor, n;
  12
  13         static const EGLint context_attribs[] = {
  14                 EGL_CONTEXT_CLIENT_VERSION, 2,
  15                 EGL_NONE
  16         };
  17
  18         static const EGLint config_attribs[] = {
  19                 EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
  20                 EGL_RED_SIZE, 8,
  21                 EGL_GREEN_SIZE, 8,
  22                 EGL_BLUE_SIZE, 8,
  23                 EGL_ALPHA_SIZE, 0,
  24                 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
  25                 EGL_NONE
  26         };
  27
  28         m_display = eglGetDisplay((EGLNativeDisplayType)native_display);
  29         FAIL_IF(!m_display, "failed to get egl display");
  30
  31         b = eglInitialize(m_display, &major, &minor);
  32         FAIL_IF(!b, "failed to initialize");
  33
  34         if (s_verbose) {
  35                 printf("Using display %p with EGL version %d.%d\n", m_display, major, minor);
  36
  37                 printf("EGL_VENDOR:      %s\n", eglQueryString(m_display, EGL_VENDOR));
  38                 printf("EGL_VERSION:     %s\n", eglQueryString(m_display, EGL_VERSION));
  39                 printf("EGL_EXTENSIONS:  %s\n", eglQueryString(m_display, EGL_EXTENSIONS));
  40                 printf("EGL_CLIENT_APIS: %s\n", eglQueryString(m_display, EGL_CLIENT_APIS));
  41         }
  42
  43         b = eglBindAPI(EGL_OPENGL_ES_API);
  44         FAIL_IF(!b, "failed to bind api EGL_OPENGL_ES_API");
  45
  46         b = eglChooseConfig(m_display, config_attribs, &m_config, 1, &n);
  47         FAIL_IF(!b || n != 1, "failed to choose config");
  48
  49         auto getconf = [this](EGLint a) { EGLint v = -1; eglGetConfigAttrib(m_display, m_config, a, &v); return v; };
  50
  51         if (s_verbose) {
  52                 printf("EGL Config %d: color buf %d/%d/%d/%d = %d, depth %d, stencil %d\n",
  53                        getconf(EGL_CONFIG_ID),
  54                        getconf(EGL_ALPHA_SIZE),
  55                        getconf(EGL_RED_SIZE),
  56                        getconf(EGL_GREEN_SIZE),
  57                        getconf(EGL_BLUE_SIZE),
  58                        getconf(EGL_BUFFER_SIZE),
  59                        getconf(EGL_DEPTH_SIZE),
  60                        getconf(EGL_STENCIL_SIZE));
  61         }
  62
  63         m_context = eglCreateContext(m_display, m_config, EGL_NO_CONTEXT, context_attribs);
  64         FAIL_IF(!m_context, "failed to create context");
  65
  66         EGLBoolean ok = eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, m_context);
  67         FAIL_IF(!ok, "eglMakeCurrent() failed");
  68 }
  69
  70 EglState::~EglState()
  71 {
  72         eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
  73         eglTerminate(m_display);
  74 }
  75
  76 EglSurface::EglSurface(const EglState &egl, void *native_window)
  77         : egl(egl)
  78 {
  79         esurface = eglCreateWindowSurface(egl.display(), egl.config(), (EGLNativeWindowType)native_window, NULL);
  80         FAIL_IF(esurface == EGL_NO_SURFACE, "failed to create egl surface");
  81 }
  82
  83 EglSurface::~EglSurface()
  84 {
  85         eglDestroySurface(egl.display(), esurface);
  86 }
  87
  88 void EglSurface::make_current()
  89 {
  90         EGLBoolean ok = eglMakeCurrent(egl.display(), esurface, esurface, egl.context());
  91         FAIL_IF(!ok, "eglMakeCurrent() failed");
  92 }
  93
  94 void EglSurface::swap_buffers()
  95 {
  96         EGLBoolean ok = eglSwapBuffers(egl.display(), esurface);
  97         FAIL_IF(!ok, "eglMakeCurrent() failed");
  98 }