gl-renderer: Replace window-create args with struct

gl_rendererer's output_window_create has a lot of arguments now. Add a
structure for the options to make it more clear what is what.
This is in preparation for adding bare-integer arguments which are ripe
for confusion when passing positional arguments.

Signed-off-by: Daniel Stone <daniels@collabora.com>

libweston/backend-drm/drm-gbm.c

@@ -185,7 +185,10 @@ drm_output_init_egl(struct drm_output *output, struct drm_backend *b)
 		output->gbm_format,
 		fallback_format_for(output->gbm_format),
 	};
-	unsigned n_formats = 1;
+	struct gl_renderer_output_options options = {
+		.drm_formats = format,
+		.drm_formats_count = 1,
+	};
 	struct weston_mode *mode = output->base.current_mode;
 	struct drm_plane *plane = output->scanout_plane;
 	unsigned int i;
@@ -231,13 +234,11 @@ drm_output_init_egl(struct drm_output *output, struct drm_backend *b)
 		return -1;
 	}
 
-	if (format[1])
-		n_formats = 2;
-	if (gl_renderer->output_window_create(&output->base,
-					      (EGLNativeWindowType)output->gbm_surface,
-					      output->gbm_surface,
-					      format,
-					      n_formats) < 0) {
+	if (options.drm_formats[1])
+		options.drm_formats_count = 2;
+	options.window_for_legacy = (EGLNativeWindowType) output->gbm_surface;
+	options.window_for_platform = output->gbm_surface;
+	if (gl_renderer->output_window_create(&output->base, &options) < 0) {
 		weston_log("failed to create gl renderer output state\n");
 		gbm_surface_destroy(output->gbm_surface);
 		output->gbm_surface = NULL;

libweston/backend-wayland/wayland.c

@@ -762,6 +762,10 @@ static int
 wayland_output_init_gl_renderer(struct wayland_output *output)
 {
 	int32_t fwidth = 0, fheight = 0;
+	struct gl_renderer_output_options options = {
+		.drm_formats = wayland_formats,
+		.drm_formats_count = ARRAY_LENGTH(wayland_formats),
+	};
 
 	if (output->frame) {
 		fwidth = frame_width(output->frame);
@@ -778,12 +782,10 @@ wayland_output_init_gl_renderer(struct wayland_output *output)
 		weston_log("failure to create wl_egl_window\n");
 		return -1;
 	}
+	options.window_for_legacy = output->gl.egl_window;
+	options.window_for_platform = output->gl.egl_window;
 
-	if (gl_renderer->output_window_create(&output->base,
-					      output->gl.egl_window,
-					      output->gl.egl_window,
-					      wayland_formats,
-					      ARRAY_LENGTH(wayland_formats)) < 0)
+	if (gl_renderer->output_window_create(&output->base, &options) < 0)
 		goto cleanup_window;
 
 	return 0;

libweston/backend-x11/x11.c

@@ -854,14 +854,16 @@ x11_output_switch_mode(struct weston_output *base, struct weston_mode *mode)
 		}
 	} else {
 		Window xid = (Window) output->window;
+		const struct gl_renderer_output_options options = {
+			.window_for_legacy = (EGLNativeWindowType) output->window,
+			.window_for_platform = &xid,
+			.drm_formats = x11_formats,
+			.drm_formats_count = ARRAY_LENGTH(x11_formats),
+		};
 
 		gl_renderer->output_destroy(&output->base);
 
-		ret = gl_renderer->output_window_create(&output->base,
-						        (EGLNativeWindowType) output->window,
-						        &xid,
-						        x11_formats,
-						        ARRAY_LENGTH(x11_formats));
+		ret = gl_renderer->output_window_create(&output->base, &options);
 		if (ret < 0)
 			return -1;
 	}
@@ -1030,13 +1032,15 @@ x11_output_enable(struct weston_output *base)
 		/* eglCreatePlatformWindowSurfaceEXT takes a Window*
 		 * but eglCreateWindowSurface takes a Window. */
 		Window xid = (Window) output->window;
+		const struct gl_renderer_output_options options = {
+			.window_for_legacy = (EGLNativeWindowType) output->window,
+			.window_for_platform = &xid,
+			.drm_formats = x11_formats,
+			.drm_formats_count = ARRAY_LENGTH(x11_formats),
+		};
 
-		ret = gl_renderer->output_window_create(
-					&output->base,
-					(EGLNativeWindowType) output->window,
-					&xid,
-					x11_formats,
-					ARRAY_LENGTH(x11_formats));
+		ret = gl_renderer->output_window_create(&output->base,
+							&options);
 		if (ret < 0)
 			goto err;
 

libweston/renderer-gl/gl-renderer.c

@@ -3172,10 +3172,7 @@ gl_renderer_output_create(struct weston_output *output,
 
 static int
 gl_renderer_output_window_create(struct weston_output *output,
-				 EGLNativeWindowType window_for_legacy,
-				 void *window_for_platform,
-				 const uint32_t *drm_formats,
-				 unsigned drm_formats_count)
+				 const struct gl_renderer_output_options *options)
 {
 	struct weston_compositor *ec = output->compositor;
 	struct gl_renderer *gr = get_renderer(ec);
@@ -3183,10 +3180,10 @@ gl_renderer_output_window_create(struct weston_output *output,
 	int ret = 0;
 
 	egl_surface = gl_renderer_create_window_surface(gr,
-							window_for_legacy,
-							window_for_platform,
-							drm_formats,
-							drm_formats_count);
+							options->window_for_legacy,
+							options->window_for_platform,
+							options->drm_formats,
+							options->drm_formats_count);
 	if (egl_surface == EGL_NO_SURFACE) {
 		weston_log("failed to create egl surface\n");
 		return -1;

libweston/renderer-gl/gl-renderer.h

@@ -76,6 +76,17 @@ struct gl_renderer_display_options {
 	unsigned drm_formats_count;
 };
 
+struct gl_renderer_output_options {
+	/** Native window handle for \c eglCreateWindowSurface */
+	EGLNativeWindowType window_for_legacy;
+	/** Native window handle for \c eglCreatePlatformWindowSurface */
+	void *window_for_platform;
+	/** Array of DRM pixel formats acceptable for the window */
+	const uint32_t *drm_formats;
+	/** The \c drm_formats array length */
+	unsigned drm_formats_count;
+};
+
 struct gl_renderer_interface {
 	/**
 	 * Initialize GL-renderer with the given EGL platform and native display
@@ -114,12 +125,7 @@ struct gl_renderer_interface {
 	 * Attach GL-renderer to the output with a native window
 	 *
 	 * \param output The output to create a rendering surface for.
-	 * \param window_for_legacy Native window handle for
-	 * eglCreateWindowSurface().
-	 * \param window_for_platform Native window handle for
-	 * eglCreatePlatformWindowSurface().
-	 * \param drm_formats Array of DRM pixel formats that are acceptable.
-	 * \param drm_formats_count The drm_formats array length.
+	 * \param options The options struct describing output configuration
 	 * \return 0 on success, -1 on failure.
 	 *
 	 * This function creates the renderer data structures needed to repaint
@@ -138,10 +144,7 @@ struct gl_renderer_interface {
 	 * with \c EGL_WINDOW_BIT in \c egl_surface_type.
 	 */
 	int (*output_window_create)(struct weston_output *output,
-				    EGLNativeWindowType window_for_legacy,
-				    void *window_for_platform,
-				    const uint32_t *drm_formats,
-				    unsigned drm_formats_count);
+				    const struct gl_renderer_output_options *options);
 
 	/**
 	 * Attach GL-renderer to the output with internal pixel storage