split out smooth-shaded cube

Makefile.am

@@ -42,5 +42,6 @@ kmscube_CFLAGS = \
 kmscube_SOURCES = \
 	common.c \
 	common.h \
+	cube-smooth.c \
 	kmscube.c \
 	esTransform.c

common.c

@@ -40,10 +40,89 @@ const struct gbm * init_gbm(int drm_fd, int w, int h)
 		return NULL;
 	}
 
+	gbm.width = w;
+	gbm.height = h;
+
 	return &gbm;
 }
 
 
+int init_egl(struct egl *egl, const struct gbm *gbm)
+{
+	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, 1,
+		EGL_GREEN_SIZE, 1,
+		EGL_BLUE_SIZE, 1,
+		EGL_ALPHA_SIZE, 0,
+		EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
+		EGL_NONE
+	};
+
+#define get_proc(name) do { \
+		egl->name = (void *)eglGetProcAddress(#name); \
+	} while (0)
+
+	get_proc(eglGetPlatformDisplayEXT);
+
+	if (egl->eglGetPlatformDisplayEXT) {
+		egl->display = egl->eglGetPlatformDisplayEXT(EGL_PLATFORM_GBM_KHR,
+				gbm->dev, NULL);
+	} else {
+		egl->display = eglGetDisplay((void *)gbm->dev);
+	}
+
+	if (!eglInitialize(egl->display, &major, &minor)) {
+		printf("failed to initialize\n");
+		return -1;
+	}
+
+	printf("Using display %p with EGL version %d.%d\n",
+			egl->display, major, minor);
+
+	printf("EGL Version \"%s\"\n", eglQueryString(egl->display, EGL_VERSION));
+	printf("EGL Vendor \"%s\"\n", eglQueryString(egl->display, EGL_VENDOR));
+	printf("EGL Extensions \"%s\"\n", eglQueryString(egl->display, EGL_EXTENSIONS));
+
+	if (!eglBindAPI(EGL_OPENGL_ES_API)) {
+		printf("failed to bind api EGL_OPENGL_ES_API\n");
+		return -1;
+	}
+
+	if (!eglChooseConfig(egl->display, config_attribs, &egl->config, 1, &n) || n != 1) {
+		printf("failed to choose config: %d\n", n);
+		return -1;
+	}
+
+	egl->context = eglCreateContext(egl->display, egl->config,
+			EGL_NO_CONTEXT, context_attribs);
+	if (egl->context == NULL) {
+		printf("failed to create context\n");
+		return -1;
+	}
+
+	egl->surface = eglCreateWindowSurface(egl->display, egl->config,
+			(EGLNativeWindowType)gbm->surface, NULL);
+	if (egl->surface == EGL_NO_SURFACE) {
+		printf("failed to create egl surface\n");
+		return -1;
+	}
+
+	/* connect the context to the surface */
+	eglMakeCurrent(egl->display, egl->surface, egl->surface, egl->context);
+
+	printf("GL Extensions: \"%s\"\n", glGetString(GL_EXTENSIONS));
+
+	return 0;
+}
+
 int create_program(const char *vs_src, const char *fs_src)
 {
 	GLuint vertex_shader, fragment_shader, program;

common.h

@@ -24,6 +24,12 @@
 #ifndef _COMMON_H
 #define _COMMON_H
 
+#define GL_GLEXT_PROTOTYPES 1
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+
 #include <gbm.h>
 
 #define GL_GLEXT_PROTOTYPES 1
@@ -35,12 +41,28 @@
 struct gbm {
 	struct gbm_device *dev;
 	struct gbm_surface *surface;
+	int width, height;
 };
 
 const struct gbm * init_gbm(int drm_fd, int w, int h);
 
 
+struct egl {
+	EGLDisplay display;
+	EGLConfig config;
+	EGLContext context;
+	EGLSurface surface;
+
+	PFNEGLGETPLATFORMDISPLAYEXTPROC eglGetPlatformDisplayEXT;
+
+	void (*draw)(unsigned i);
+};
+
+int init_egl(struct egl *egl, const struct gbm *gbm);
 int create_program(const char *vs_src, const char *fs_src);
 int link_program(unsigned program);
 
+
+const struct egl * init_cube_smooth(const struct gbm *gbm);
+
 #endif /* _COMMON_H */