common.h

#ifndef _COMMON_H
#define _COMMON_H

#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>

#include <gbm.h>
#include <drm_fourcc.h>

#ifndef DRM_FORMAT_MOD_LINEAR
#define DRM_FORMAT_MOD_LINEAR 0
#endif

#ifndef DRM_FORMAT_MOD_INVALID
#define DRM_FORMAT_MOD_INVALID ((((__u64)0) << 56) | ((1ULL << 56) - 1))
#endif

#ifndef EGL_KHR_platform_gbm
#define EGL_KHR_platform_gbm 1
#define EGL_PLATFORM_GBM_KHR              0x31D7
#endif /* EGL_KHR_platform_gbm */

#ifndef EGL_EXT_platform_base
#define EGL_EXT_platform_base 1
typedef EGLDisplay (EGLAPIENTRYP PFNEGLGETPLATFORMDISPLAYEXTPROC) (EGLenum platform, void *native_display, const EGLint *attrib_list);
typedef EGLSurface (EGLAPIENTRYP PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC) (EGLDisplay dpy, EGLConfig config, void *native_window, const EGLint *attrib_list);
typedef EGLSurface (EGLAPIENTRYP PFNEGLCREATEPLATFORMPIXMAPSURFACEEXTPROC) (EGLDisplay dpy, EGLConfig config, void *native_pixmap, const EGLint *attrib_list);
#ifdef EGL_EGLEXT_PROTOTYPES
EGLAPI EGLDisplay EGLAPIENTRY eglGetPlatformDisplayEXT (EGLenum platform, void *native_display, const EGLint *attrib_list);
EGLAPI EGLSurface EGLAPIENTRY eglCreatePlatformWindowSurfaceEXT (EGLDisplay dpy, EGLConfig config, void *native_window, const EGLint *attrib_list);
EGLAPI EGLSurface EGLAPIENTRY eglCreatePlatformPixmapSurfaceEXT (EGLDisplay dpy, EGLConfig config, void *native_pixmap, const EGLint *attrib_list);
#endif
#endif /* EGL_EXT_platform_base */

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, uint64_t modifier);

struct egl {
	EGLDisplay display;
	EGLConfig config;
	EGLContext context;
	EGLSurface surface;

	PFNEGLGETPLATFORMDISPLAYEXTPROC eglGetPlatformDisplayEXT;
	PFNEGLCREATEIMAGEKHRPROC eglCreateImageKHR;
	PFNEGLDESTROYIMAGEKHRPROC eglDestroyImageKHR;
	PFNGLEGLIMAGETARGETTEXTURE2DOESPROC glEGLImageTargetTexture2DOES;
	PFNEGLCREATESYNCKHRPROC eglCreateSyncKHR;
	PFNEGLDESTROYSYNCKHRPROC eglDestroySyncKHR;
	PFNEGLWAITSYNCKHRPROC eglWaitSyncKHR;
	PFNEGLCLIENTWAITSYNCKHRPROC eglClientWaitSyncKHR;
	PFNEGLDUPNATIVEFENCEFDANDROIDPROC eglDupNativeFenceFDANDROID;

	void (*draw)(unsigned i);
};

static inline int __egl_check(void *ptr, const char *name)
{
	if (!ptr) {
		printf("no %s\n", name);
		return -1;
	}
	return 0;
}

#define egl_check(egl, name) __egl_check((egl)->name, #name)

struct egl* egl_init(const struct gbm *gbm);

#endif /* _COMMON_H */