1 files changed, 122 insertions, 0 deletions
diff --git a/src/egl.c b/src/egl.c
new file mode 100644
index 0000000..bd45413
--- /dev/null
+++ b/src/egl.c
@@ -0,0 +1,122 @@
+#include <assert.h>
+#include <string.h>
+#include <wayland-egl.h>
+#include "client.h"
+#include "log.h"
+
+static void egl_log_error();
+static const char *egl_error_string();
+
+void egl_create_window(struct client_state *state)
+{
+	state->egl.window = wl_egl_window_create(
+			state->wl_surface,
+			state->width,
+			state->height);
+
+	if (state->egl.window == EGL_NO_SURFACE) {
+		egl_log_error("Couldn't create EGL window");
+	}
+}
+
+void egl_create_context(struct client_state *state)
+{
+	struct egl *egl = &state->egl;
+	egl->display = eglGetDisplay(state->wl_display);
+	if (egl->display == EGL_NO_DISPLAY) {
+		egl_log_error("Couldn't get EGL display");
+		return;
+	}
+
+	if (!eglInitialize(egl->display, NULL, NULL)) {
+		egl_log_error("Couldn't initialise EGL");
+		return;
+	}
+
+	EGLBoolean result;
+	EGLConfig config;
+	EGLint num_configs;
+	static const EGLint config_attribs[] = {
+		EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
+		EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
+		EGL_RED_SIZE, 8,
+		EGL_GREEN_SIZE, 8,
+		EGL_BLUE_SIZE, 8,
+		EGL_NONE
+	};
+
+	result = eglGetConfigs(egl->display, NULL, 0, &num_configs);
+	if ((result != EGL_TRUE) || (num_configs == 0)) {
+		egl_log_error("No EGL configs available");
+		return;
+	}
+
+	result = eglChooseConfig(egl->display, config_attribs, &config, 1, &num_configs);
+	if ((result != EGL_TRUE) || (num_configs != 1)) {
+		egl_log_error("Failed to choose EGL config");
+		return;
+	}
+
+	egl->surface = eglCreateWindowSurface(egl->display, config, egl->window, NULL);
+	if (egl->surface == EGL_NO_SURFACE) {
+		egl_log_error("Couldn't create EGL window surface");
+		return;
+	}
+
+	static const EGLint context_attribs[] = {
+		EGL_CONTEXT_MAJOR_VERSION, 2,
+		EGL_NONE
+	};
+
+	egl->context = eglCreateContext(egl->display, config, EGL_NO_CONTEXT, context_attribs);
+	if (egl->context == EGL_NO_CONTEXT) {
+		egl_log_error("Couldn't create EGL context");
+		return;
+	}
+
+	result = eglMakeCurrent(egl->display, egl->surface, egl->surface, egl->context);
+	if (!result) {
+		egl_log_error("Couldn't make EGL context current");
+		return;
+	}
+}
+
+void egl_log_error(const char *msg) {
+	log_error("%s: %s\n", msg, egl_error_string());
+}
+
+const char *egl_error_string() {
+	switch(eglGetError()) {
+		case EGL_SUCCESS:
+			return "EGL_SUCCESS";
+		case EGL_NOT_INITIALIZED:
+			return "EGL_NOT_INITIALIZED";
+		case EGL_BAD_ACCESS:
+			return "EGL_BAD_ACCESS";
+		case EGL_BAD_ALLOC:
+			return "EGL_BAD_ALLOC";
+		case EGL_BAD_ATTRIBUTE:
+			return "EGL_BAD_ATTRIBUTE";
+		case EGL_BAD_CONTEXT:
+			return "EGL_BAD_CONTEXT";
+		case EGL_BAD_CONFIG:
+			return "EGL_BAD_CONFIG";
+		case EGL_BAD_CURRENT_SURFACE:
+			return "EGL_BAD_CURRENT_SURFACE";
+		case EGL_BAD_DISPLAY:
+			return "EGL_BAD_DISPLAY";
+		case EGL_BAD_SURFACE:
+			return "EGL_BAD_SURFACE";
+		case EGL_BAD_MATCH:
+			return "EGL_BAD_MATCH";
+		case EGL_BAD_PARAMETER:
+			return "EGL_BAD_PARAMETER";
+		case EGL_BAD_NATIVE_PIXMAP:
+			return "EGL_BAD_NATIVE_PIXMAP";
+		case EGL_BAD_NATIVE_WINDOW:
+			return "EGL_BAD_NATIVE_WINDOW";
+		case EGL_CONTEXT_LOST:
+			return "EGL_CONTEXT_LOST";
+	}
+	return "Unknown EGL error";
+}