1 files changed, 95 insertions, 0 deletions
diff --git a/kmscube/cube-egl.cpp b/kmscube/cube-egl.cpp
new file mode 100644
index 0000000..4213536
--- /dev/null
+++ b/kmscube/cube-egl.cpp
@@ -0,0 +1,95 @@
+#include "cube-egl.h"
+#include "cube.h"
+
+#include "test.h"
+
+using namespace std;
+
+EglState::EglState(void *native_display)
+{
+	EGLBoolean b;
+	EGLint major, minor, n;
+
+	static const EGLint context_attribs[] = {
+		EGL_CONTEXT_CLIENT_VERSION, 2,
+		EGL_NONE
+	};
+
+	static const EGLint config_attribs[] = {
+		EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
+		EGL_RED_SIZE, 8,
+		EGL_GREEN_SIZE, 8,
+		EGL_BLUE_SIZE, 8,
+		EGL_ALPHA_SIZE, 0,
+		EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
+		EGL_NONE
+	};
+
+	m_display = eglGetDisplay((EGLNativeDisplayType)native_display);
+	FAIL_IF(!m_display, "failed to get egl display");
+
+	b = eglInitialize(m_display, &major, &minor);
+	FAIL_IF(!b, "failed to initialize");
+
+	if (s_verbose) {
+		printf("Using display %p with EGL version %d.%d\n", m_display, major, minor);
+
+		printf("EGL_VENDOR:      %s\n", eglQueryString(m_display, EGL_VENDOR));
+		printf("EGL_VERSION:     %s\n", eglQueryString(m_display, EGL_VERSION));
+		printf("EGL_EXTENSIONS:  %s\n", eglQueryString(m_display, EGL_EXTENSIONS));
+		printf("EGL_CLIENT_APIS: %s\n", eglQueryString(m_display, EGL_CLIENT_APIS));
+	}
+
+	b = eglBindAPI(EGL_OPENGL_ES_API);
+	FAIL_IF(!b, "failed to bind api EGL_OPENGL_ES_API");
+
+	b = eglChooseConfig(m_display, config_attribs, &m_config, 1, &n);
+	FAIL_IF(!b || n != 1, "failed to choose config");
+
+	auto getconf = [this](EGLint a) { EGLint v = -1; eglGetConfigAttrib(m_display, m_config, a, &v); return v; };
+
+	if (s_verbose) {
+		printf("EGL Config %d: color buf %d/%d/%d/%d = %d, depth %d, stencil %d\n",
+		       getconf(EGL_CONFIG_ID),
+		       getconf(EGL_ALPHA_SIZE),
+		       getconf(EGL_RED_SIZE),
+		       getconf(EGL_GREEN_SIZE),
+		       getconf(EGL_BLUE_SIZE),
+		       getconf(EGL_BUFFER_SIZE),
+		       getconf(EGL_DEPTH_SIZE),
+		       getconf(EGL_STENCIL_SIZE));
+	}
+
+	m_context = eglCreateContext(m_display, m_config, EGL_NO_CONTEXT, context_attribs);
+	FAIL_IF(!m_context, "failed to create context");
+
+	eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, m_context);
+}
+
+EglState::~EglState()
+{
+	eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+	eglTerminate(m_display);
+}
+
+EglSurface::EglSurface(const EglState &egl, void *native_window)
+	: egl(egl)
+{
+	esurface = eglCreateWindowSurface(egl.display(), egl.config(), (EGLNativeWindowType)native_window, NULL);
+	FAIL_IF(esurface == EGL_NO_SURFACE, "failed to create egl surface");
+}
+
+EglSurface::~EglSurface()
+{
+	eglDestroySurface(egl.display(), esurface);
+}
+
+void EglSurface::make_current()
+{
+	eglMakeCurrent(egl.display(), esurface, esurface, egl.context());
+}
+
+void EglSurface::swap_buffers()
+{
+	eglSwapBuffers(egl.display(), esurface);
+}