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#include <vulkan/vulkan.h>
#include <X11/Xlib.h>
#include <vulkan/vulkan_xlib.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define W 1260
#define H 720
#define CK(x) do { VkResult _r = (x); if (_r != VK_SUCCESS) { \
fprintf(stderr, "FAIL %s -> %d\n", #x, _r); exit(1); } } while (0)
int main()
{
Display *dpy = XOpenDisplay( NULL );
if (!dpy) { fprintf( stderr, "no display\n" ); return 1; }
Window win = XCreateSimpleWindow( dpy, DefaultRootWindow( dpy ), 10, 10, W, H, 0, 0, 0 );
XStoreName( dpy, win, "vktest" );
XMapWindow( dpy, win );
XFlush( dpy );
const char *iexts[] = { "VK_KHR_surface", "VK_KHR_xlib_surface" };
VkApplicationInfo ai = { VK_STRUCTURE_TYPE_APPLICATION_INFO };
ai.apiVersion = VK_API_VERSION_1_1;
VkInstanceCreateInfo ici = { VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO };
ici.pApplicationInfo = &ai;
ici.enabledExtensionCount = 2;
ici.ppEnabledExtensionNames = iexts;
VkInstance inst;
CK( vkCreateInstance(&ici, NULL, &inst ));
uint32_t n = 1;
VkPhysicalDevice phys;
vkEnumeratePhysicalDevices( inst, &n, &phys );
VkSurfaceKHR surf;
VkXlibSurfaceCreateInfoKHR sci = { VK_STRUCTURE_TYPE_XLIB_SURFACE_CREATE_INFO_KHR };
sci.dpy = dpy;
sci.window = win;
CK( vkCreateXlibSurfaceKHR( inst, &sci, NULL, &surf ) );
uint32_t nfam = 0;
vkGetPhysicalDeviceQueueFamilyProperties( phys, &nfam, NULL );
VkQueueFamilyProperties fam[8];
if( nfam > 8 ) nfam = 8;
vkGetPhysicalDeviceQueueFamilyProperties( phys, &nfam, fam );
uint32_t qf = UINT32_MAX;
for( uint32_t i = 0; i < nfam; i++ ) {
VkBool32 pres = VK_FALSE;
vkGetPhysicalDeviceSurfaceSupportKHR( phys, i, surf, &pres );
if( (fam[i].queueFlags & VK_QUEUE_GRAPHICS_BIT) && pres ) { qf = i; break; }
}
if( qf == UINT32_MAX ) { fprintf( stderr, "no queue\n" ); return 1; }
float prio = 1.0f;
VkDeviceQueueCreateInfo qci = { VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO };
qci.queueFamilyIndex = qf;
qci.queueCount = 1;
qci.pQueuePriorities = &prio;
const char *dexts[] = { "VK_KHR_swapchain" };
VkDeviceCreateInfo dci = { VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO };
dci.queueCreateInfoCount = 1;
dci.pQueueCreateInfos = &qci;
dci.enabledExtensionCount = 1;
dci.ppEnabledExtensionNames = dexts;
VkDevice dev;
CK( vkCreateDevice( phys, &dci, NULL, &dev ) );
VkQueue q;
vkGetDeviceQueue( dev, qf, 0, &q );
VkSurfaceFormatKHR fmts[16];
uint32_t nfmt = 16;
vkGetPhysicalDeviceSurfaceFormatsKHR( phys, surf, &nfmt, fmts );
VkSurfaceCapabilitiesKHR caps;
vkGetPhysicalDeviceSurfaceCapabilitiesKHR( phys, surf, &caps );
VkSwapchainCreateInfoKHR scci = { VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR };
scci.surface = surf;
scci.minImageCount = caps.minImageCount;
scci.imageFormat = fmts[0].format;
scci.imageColorSpace = fmts[0].colorSpace;
scci.imageExtent.width = W;
scci.imageExtent.height = H;
scci.imageArrayLayers = 1;
scci.imageUsage = VK_IMAGE_USAGE_TRANSFER_DST_BIT | VK_IMAGE_USAGE_TRANSFER_SRC_BIT;
scci.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE;
scci.preTransform = caps.currentTransform;
scci.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
scci.presentMode = VK_PRESENT_MODE_FIFO_KHR;
scci.clipped = VK_TRUE;
VkSwapchainKHR sc;
CK( vkCreateSwapchainKHR( dev, &scci, NULL, &sc ) );
printf( "swapchain format: %d\n", fmts[0].format );
uint32_t nimg = 8;
VkImage imgs[8];
vkGetSwapchainImagesKHR( dev, sc, &nimg, imgs );
VkCommandPoolCreateInfo cpci = { VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO };
cpci.flags = VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT;
cpci.queueFamilyIndex = qf;
VkCommandPool pool;
CK( vkCreateCommandPool( dev, &cpci, NULL, &pool ));
VkCommandBufferAllocateInfo cbai = { VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO };
cbai.commandPool = pool;
cbai.level = VK_COMMAND_BUFFER_LEVEL_PRIMARY;
cbai.commandBufferCount = 1;
VkCommandBuffer cb;
CK( vkAllocateCommandBuffers( dev, &cbai, &cb ) );
VkSemaphoreCreateInfo semci = { VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO };
VkSemaphore acq, ren;
CK( vkCreateSemaphore( dev, &semci, NULL, &acq ) );
CK( vkCreateSemaphore( dev, &semci, NULL, &ren ) );
VkFenceCreateInfo fci = { VK_STRUCTURE_TYPE_FENCE_CREATE_INFO };
VkFence fence;
CK( vkCreateFence(dev, &fci, NULL, &fence ));
VkBufferCreateInfo bci = { VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO };
bci.size = (VkDeviceSize)W * H * 4;
bci.usage = VK_BUFFER_USAGE_TRANSFER_DST_BIT;
VkBuffer rb;
CK( vkCreateBuffer( dev, &bci, NULL, &rb ) );
VkMemoryRequirements mr;
vkGetBufferMemoryRequirements( dev, rb, &mr );
VkPhysicalDeviceMemoryProperties mp;
vkGetPhysicalDeviceMemoryProperties( phys, &mp );
uint32_t type = 0;
for( uint32_t i = 0; i < mp.memoryTypeCount; i++ ) {
if( (mr.memoryTypeBits & (1u << i)) && (mp.memoryTypes[i].propertyFlags & VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT) ) {
type = i; break;
}
}
VkMemoryAllocateInfo mai = { VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO };
mai.allocationSize = mr.size;
mai.memoryTypeIndex = type;
VkDeviceMemory rmem;
CK( vkAllocateMemory(dev, &mai, NULL, &rmem ) );
CK( vkBindBufferMemory(dev, rb, rmem, 0 ) );
VkImageSubresourceRange range;
memset( &range, 0, sizeof( range ));
range.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
range.levelCount = 1;
range.layerCount = 1;
for( ;; ) {
uint32_t idx;
CK( vkAcquireNextImageKHR(dev, sc, UINT64_MAX, acq, VK_NULL_HANDLE, &idx ) );
VkCommandBufferBeginInfo bi = { VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO };
bi.flags = VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT;
CK( vkBeginCommandBuffer( cb, &bi ) );
VkImageMemoryBarrier b = { VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER };
b.srcAccessMask = 0;
b.dstAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT;
b.oldLayout = VK_IMAGE_LAYOUT_UNDEFINED;
b.newLayout = VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL;
b.srcQueueFamilyIndex = b.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
b.image = imgs[idx];
b.subresourceRange = range;
vkCmdPipelineBarrier(
cb, VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT,
VK_PIPELINE_STAGE_TRANSFER_BIT, 0, 0, NULL,
0, NULL, 1, &b
);
VkClearColorValue col = { { 0.05f, 0.10f, 0.20f, 1.0f } };
vkCmdClearColorImage( cb, imgs[idx], VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, &col, 1, &range );
b.srcAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT;
b.dstAccessMask = 0;
b.oldLayout = VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL;
b.newLayout = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR;
vkCmdPipelineBarrier(
cb, VK_PIPELINE_STAGE_TRANSFER_BIT,
VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT, 0, 0, NULL,
0, NULL, 1, &b
);
CK( vkEndCommandBuffer( cb ) );
VkPipelineStageFlags wait = VK_PIPELINE_STAGE_TRANSFER_BIT;
VkSubmitInfo si = { VK_STRUCTURE_TYPE_SUBMIT_INFO };
si.waitSemaphoreCount = 1;
si.pWaitSemaphores = &acq;
si.pWaitDstStageMask = &wait;
si.commandBufferCount = 1;
si.pCommandBuffers = &cb;
si.signalSemaphoreCount = 1;
si.pSignalSemaphores = &ren;
CK( vkQueueSubmit(q, 1, &si, VK_NULL_HANDLE ) );
VkPresentInfoKHR pi = { VK_STRUCTURE_TYPE_PRESENT_INFO_KHR };
pi.waitSemaphoreCount = 1;
pi.pWaitSemaphores = &ren;
pi.swapchainCount = 1;
pi.pSwapchains = ≻
pi.pImageIndices = &idx;
CK( vkQueuePresentKHR( q, &pi ) );
vkQueueWaitIdle( q );
usleep( 1 );
}
return 0;
}
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