# HG changeset patch
# User John Tsiombikas <nuclear@member.fsf.org>
# Date 1506091698 -10800
# Node ID cec4b0e7fce81cb19dc9210cd469c7aa411b0cf0
# Parent  c31c4115d44a3c988cd0690c3016520e1ca7b3a6
created swapchain

diff -r c31c4115d44a -r cec4b0e7fce8 src/vku.c
--- a/src/vku.c	Fri Sep 22 15:26:29 2017 +0300
+++ b/src/vku.c	Fri Sep 22 17:48:18 2017 +0300
@@ -99,6 +99,9 @@
 #endif
 		"VK_KHR_surface"
 	};
+	static const char *devext_names[] = {
+		"VK_KHR_swapchain"
+	};
 
 	sel_dev = -1;
 	sel_qfamily = -1;
@@ -189,6 +192,14 @@
 		return -1;
 	}
 
+	for(i=0; i<sizeof devext_names / sizeof *devext_names; i++) {
+		if(!vku_have_device_extension(devext_names[i])) {
+			fprintf(stderr, "required extension (%s) not found on the selected device (%d)\n",
+					ext_names[i], sel_dev);
+			return -1;
+		}
+	}
+
 	/* create device & command queue */
 	memset(&queue_info, 0, sizeof queue_info);
 	queue_info.sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO;
@@ -200,6 +211,8 @@
 	dev_info.sType = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO;
 	dev_info.queueCreateInfoCount = 1;
 	dev_info.pQueueCreateInfos = &queue_info;
+	dev_info.enabledExtensionCount = sizeof devext_names / sizeof *devext_names;
+	dev_info.ppEnabledExtensionNames = devext_names;
 
 	if(vkCreateDevice(phys_devices[sel_dev], &dev_info, 0, &vkdev) != 0) {
 		fprintf(stderr, "failed to create device %d\n", sel_dev);
@@ -298,6 +311,34 @@
 	vkQueueSubmit(q, 1, &info, done_fence);
 }
 
+VkSwapchainKHR vku_create_swapchain(VkSurfaceKHR surf, int xsz, int ysz, int n,
+		VkPresentModeKHR pmode, VkSwapchainKHR prev)
+{
+	VkSwapchainKHR sc;
+	VkSwapchainCreateInfoKHR inf;
+
+	memset(&inf, 0, sizeof inf);
+	inf.sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR;
+	inf.surface = surf;
+	inf.minImageCount = n;
+	inf.imageFormat = VK_FORMAT_B8G8R8A8_UNORM;	/* TODO enumerate and choose */
+	inf.imageColorSpace = VK_COLORSPACE_SRGB_NONLINEAR_KHR;
+	inf.imageExtent.width = xsz;
+	inf.imageExtent.height = ysz;
+	inf.imageArrayLayers = 1;
+	inf.imageUsage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
+	inf.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE;	/* XXX make this an option? */
+	inf.preTransform = VK_SURFACE_TRANSFORM_INHERIT_BIT_KHR;
+	inf.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
+	inf.presentMode = pmode;
+	inf.oldSwapchain = prev;
+
+	if(vkCreateSwapchainKHR(vkdev, &inf, 0, &sc) != 0) {
+		return 0;
+	}
+	return sc;
+}
+
 struct vku_buffer *vku_create_buffer(int sz, unsigned int usage)
 {
 	struct vku_buffer *buf;
@@ -342,11 +383,29 @@
 }
 
 #ifdef VK_USE_PLATFORM_XLIB_KHR
+
 int vku_xlib_usable_visual(Display *dpy, VisualID vid)
 {
 	return vkGetPhysicalDeviceXlibPresentationSupportKHR(phys_devices[sel_dev],
 			sel_qfamily, dpy, vid);
 }
+
+VkSurfaceKHR vku_xlib_create_surface(Display *dpy, Window win)
+{
+	VkSurfaceKHR surf;
+	VkXlibSurfaceCreateInfoKHR inf;
+
+	memset(&inf, 0, sizeof inf);
+	inf.sType = VK_STRUCTURE_TYPE_XLIB_SURFACE_CREATE_INFO_KHR;
+	inf.dpy = dpy;
+	inf.window = win;
+
+	if(vkCreateXlibSurfaceKHR(vk, &inf, 0, &surf) != 0) {
+		return 0;
+	}
+	return surf;
+}
+
 #endif	/* VK_USE_PLATFORM_XLIB_KHR */
 
 static const char *get_device_name(VkPhysicalDeviceType type)
diff -r c31c4115d44a -r cec4b0e7fce8 src/vku.h
--- a/src/vku.h	Fri Sep 22 15:26:29 2017 +0300
+++ b/src/vku.h	Fri Sep 22 17:48:18 2017 +0300
@@ -34,6 +34,9 @@
 
 void vku_submit_cmdbuf(VkQueue q, VkCommandBuffer buf, VkFence done_fence);
 
+VkSwapchainKHR vku_create_swapchain(VkSurfaceKHR surf, int xsz, int ysz, int n,
+		VkPresentModeKHR pmode, VkSwapchainKHR prev);
+
 struct vku_buffer *vku_create_buffer(int sz, unsigned int usage);
 void vku_destroy_buffer(struct vku_buffer *buf);
 
@@ -44,6 +47,7 @@
 #ifdef VK_USE_PLATFORM_XLIB_KHR
 #include <X11/Xlib.h>
 int vku_xlib_usable_visual(Display *dpy, VisualID vid);
+VkSurfaceKHR vku_xlib_create_surface(Display *dpy, Window win);
 #endif
 
 #endif	/* VKU_H_ */
diff -r c31c4115d44a -r cec4b0e7fce8 src/wsys_x11.c
--- a/src/wsys_x11.c	Fri Sep 22 15:26:29 2017 +0300
+++ b/src/wsys_x11.c	Fri Sep 22 17:48:18 2017 +0300
@@ -24,6 +24,8 @@
 
 static Display *dpy;
 static Window win;
+static VkSurfaceKHR surf;
+static VkSwapchainKHR swapchain;
 static Atom xa_wm_delete;
 static int win_width, win_height;
 static int win_mapped;
@@ -87,6 +89,14 @@
 	XSelectInput(dpy, win, evmask);
 	XSetWMProtocols(dpy, win, &xa_wm_delete, 1);
 
+	if(!(surf = vku_xlib_create_surface(dpy, win))) {
+		fprintf(stderr, "failed to create vulkan surface for the window\n");
+		XDestroyWindow(dpy, win);
+		XCloseDisplay(dpy);
+		return -1;
+	}
+	/* swapchain gets created before the first reshape invocation */
+
 	wsys_set_window_title("X11 window");
 	XMapWindow(dpy, win);
 
@@ -206,6 +216,13 @@
 	XEvent xev;
 
 	if(pending & RESHAPE) {
+		VkSwapchainKHR sc;
+		if(!(sc = vku_create_swapchain(surf, win_width, win_height, 2, VK_PRESENT_MODE_FIFO_KHR, swapchain))) {
+			fprintf(stderr, "Failed to create %dx%d double-buffered swapchain\n", win_width, win_height);
+			return -1;
+		}
+		swapchain = sc;
+
 		if(cb.reshape) {
 			cb.reshape(win_width, win_height);
 		}