backend: gl: use libepoxy's has_*_extension

So we don't need maintain our own version.

(cherry picked from commit 755996a42c)
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>

src/backend/gl/egl.c

@@ -395,40 +395,6 @@ struct backend_operations egl_ops = {
     .max_buffer_age = 5,        // Why?
 };
 
-/**
- * Check if a EGL extension exists.
- */
-static inline bool egl_has_extension(EGLDisplay dpy, const char *ext) {
-	const char *egl_exts = eglQueryString(dpy, EGL_EXTENSIONS);
-	if (!egl_exts) {
-		log_error("Failed get EGL extension list.");
-		return false;
-	}
-
-	auto inlen = strlen(ext);
-	const char *curr = egl_exts;
-	bool match = false;
-	while (curr && !match) {
-		const char *end = strchr(curr, ' ');
-		if (!end) {
-			// Last extension string
-			match = strcmp(ext, curr) == 0;
-		} else if (curr + inlen == end) {
-			// Length match, do match string
-			match = strncmp(ext, curr, (unsigned long)(end - curr)) == 0;
-		}
-		curr = end ? end + 1 : NULL;
-	}
-
-	if (!match) {
-		log_info("Missing EGL extension %s.", ext);
-	} else {
-		log_info("Found EGL extension %s.", ext);
-	}
-
-	return match;
-}
-
 struct eglext_info eglext = {0};
 
 void eglext_init(EGLDisplay dpy) {
@@ -436,7 +402,10 @@ void eglext_init(EGLDisplay dpy) {
 		return;
 	}
 	eglext.initialized = true;
-#define check_ext(name) eglext.has_##name = egl_has_extension(dpy, #name)
+#define check_ext(name)                                                                  \
+	eglext.has_##name = epoxy_has_egl_extension(dpy, #name);                         \
+	log_info("Extension " #name " - %s", eglext.has_##name ? "present" : "absent")
+
 	check_ext(EGL_EXT_buffer_age);
 	check_ext(EGL_EXT_create_context_robustness);
 	check_ext(EGL_KHR_image_pixmap);

src/backend/gl/gl_common.c

@@ -960,8 +960,8 @@ bool gl_init(struct gl_data *gd, session_t *ps) {
 	} else {
 		gd->is_nvidia = false;
 	}
-	gd->has_robustness = gl_has_extension("GL_ARB_robustness");
-	gd->has_egl_image_storage = gl_has_extension("GL_EXT_EGL_image_storage");
+	gd->has_robustness = epoxy_has_gl_extension("GL_ARB_robustness");
+	gd->has_egl_image_storage = epoxy_has_gl_extension("GL_EXT_EGL_image_storage");
 	gl_check_err();
 
 	return true;

src/backend/gl/gl_common.h

@@ -264,26 +264,6 @@ static inline bool gl_check_fb_complete_(const char *func, int line, GLenum fb)
 
 #define gl_check_fb_complete(fb) gl_check_fb_complete_(__func__, __LINE__, (fb))
 
-/**
- * Check if a GL extension exists.
- */
-static inline bool gl_has_extension(const char *ext) {
-	int nexts = 0;
-	glGetIntegerv(GL_NUM_EXTENSIONS, &nexts);
-	for (int i = 0; i < nexts || !nexts; i++) {
-		const char *exti = (const char *)glGetStringi(GL_EXTENSIONS, (GLuint)i);
-		if (exti == NULL) {
-			break;
-		}
-		if (strcmp(ext, exti) == 0) {
-			return true;
-		}
-	}
-	gl_clear_err();
-	log_info("Missing GL extension %s.", ext);
-	return false;
-}
-
 static const GLuint vert_coord_loc = 0;
 static const GLuint vert_in_texcoord_loc = 1;
 

src/backend/gl/glx.c

@@ -545,52 +545,17 @@ struct backend_operations glx_ops = {
     .max_buffer_age = 5,        // Why?
 };
 
-/**
- * Check if a GLX extension exists.
- */
-static inline bool glx_has_extension(Display *dpy, int screen, const char *ext) {
-	const char *glx_exts = glXQueryExtensionsString(dpy, screen);
-	if (!glx_exts) {
-		log_error("Failed get GLX extension list.");
-		return false;
-	}
-
-	auto inlen = strlen(ext);
-	const char *curr = glx_exts;
-	bool match = false;
-	while (curr && !match) {
-		const char *end = strchr(curr, ' ');
-		if (!end) {
-			// Last extension string
-			match = strcmp(ext, curr) == 0;
-		} else if (curr + inlen == end) {
-			// Length match, do match string
-			match = strncmp(ext, curr, (unsigned long)(end - curr)) == 0;
-		}
-		curr = end ? end + 1 : NULL;
-	}
-
-	if (!match) {
-		log_info("Missing GLX extension %s.", ext);
-	} else {
-		log_info("Found GLX extension %s.", ext);
-	}
-
-	return match;
-}
-
 struct glxext_info glxext = {0};
 
-#ifdef GLX_MESA_query_renderer
-PFNGLXQUERYCURRENTRENDERERINTEGERMESAPROC glXQueryCurrentRendererIntegerMESA;
-#endif
-
 void glxext_init(Display *dpy, int screen) {
 	if (glxext.initialized) {
 		return;
 	}
 	glxext.initialized = true;
-#define check_ext(name) glxext.has_##name = glx_has_extension(dpy, screen, #name)
+#define check_ext(name)                                                                  \
+	glxext.has_##name = epoxy_has_glx_extension(dpy, screen, #name);                 \
+	log_info("Extension " #name " - %s", glxext.has_##name ? "present" : "absent")
+
 	check_ext(GLX_SGI_video_sync);
 	check_ext(GLX_SGI_swap_control);
 	check_ext(GLX_OML_sync_control);

src/log.c

@@ -357,7 +357,7 @@ static const struct log_ops gl_string_marker_logger_ops = {
 /// Create an opengl logger that can be used for logging into opengl debugging tools,
 /// such as apitrace
 struct log_target *gl_string_marker_logger_new(void) {
-	if (!gl_has_extension("GL_GREMEDY_string_marker")) {
+	if (!epoxy_has_gl_extension("GL_GREMEDY_string_marker")) {
 		return NULL;
 	}
 

src/opengl.c

@@ -181,7 +181,7 @@ bool glx_init(session_t *ps, bool need_render) {
 	// must precede FBConfig fetching
 	if (need_render) {
 		psglx->has_texture_non_power_of_two =
-		    gl_has_extension("GL_ARB_texture_non_power_of_two");
+		    epoxy_has_gl_extension("GL_ARB_texture_non_power_of_two");
 	}
 
 	// Render preparations