Changeset d2d9286 in opengl-game for vulkan-utils.cpp

Timestamp:

Nov 7, 2019, 2:05:17 AM (5 years ago)

Author:

Dmitry Portnoy <dmp1488@…>

Branches:

feature/imgui-sdl, master, points-test

Children:

f985231

Parents:

87c8f1a

Message:

In vulkangame, implement the renderScene function to draw a frame in Vulkan and implement a test UI overlay

File:

• vulkan-utils.cpp (modified) (2 diffs)

vulkan-utils.cpp

@@ -269 +269 @@
    VkDeviceMemory stagingBufferMemory;
 
-   createBuffer(device, physicalDevice, imageSize, VK_BUFFER_USAGE_TRANSFER_SRC_BIT,
+   createBuffer(device, physicalDevice, imageSize,
+      VK_BUFFER_USAGE_TRANSFER_SRC_BIT,
       VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
       stagingBuffer, stagingBufferMemory);
@@ -308 +309 @@
 
    image.imageView = createImageView(device, image.image, VK_FORMAT_R8G8B8A8_UNORM, VK_IMAGE_ASPECT_COLOR_BIT);
+}
+
+void VulkanUtils::populateVulkanImageFromSDLTexture(VkDevice device, VkPhysicalDevice physicalDevice,
+      VkCommandPool commandPool, SDL_Texture* texture, SDL_Renderer* renderer, VulkanImage& image,
+      VkQueue graphicsQueue) {
+   int a, w, h;
+
+   SDL_QueryTexture(texture, nullptr, &a, &w, &h);
+
+   VkDeviceSize imageSize = w * h * 4;
+   unsigned char* pixels = new unsigned char[imageSize];
+
+   SDL_RenderReadPixels(renderer, nullptr, SDL_PIXELFORMAT_ABGR8888, pixels, w * 4);
+
+   VkBuffer stagingBuffer;
+   VkDeviceMemory stagingBufferMemory;
+
+   createBuffer(device, physicalDevice, imageSize,
+      VK_BUFFER_USAGE_TRANSFER_DST_BIT | VK_BUFFER_USAGE_TRANSFER_SRC_BIT,
+      VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT,
+      stagingBuffer, stagingBufferMemory);
+
+   void* data;
+
+   vkMapMemory(device, stagingBufferMemory, 0, VK_WHOLE_SIZE, 0, &data);
+   memcpy(data, pixels, static_cast<size_t>(imageSize));
+
+   VkMappedMemoryRange mappedMemoryRange = {};
+   mappedMemoryRange.sType = VK_STRUCTURE_TYPE_MAPPED_MEMORY_RANGE;
+   mappedMemoryRange.memory = stagingBufferMemory;
+   mappedMemoryRange.offset = 0;
+   mappedMemoryRange.size = VK_WHOLE_SIZE;
+
+   // TODO: Should probably check that the function succeeded
+   vkFlushMappedMemoryRanges(device, 1, &mappedMemoryRange);
+   vkUnmapMemory(device, stagingBufferMemory);
+
+   delete[] pixels;
+
+   transitionImageLayout(device, commandPool, image.image, VK_FORMAT_R8G8B8A8_UNORM,
+      VK_IMAGE_LAYOUT_UNDEFINED, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, graphicsQueue);
+   copyBufferToImage(device, commandPool, stagingBuffer, image.image,
+      static_cast<uint32_t>(w), static_cast<uint32_t>(h), graphicsQueue);
+   transitionImageLayout(device, commandPool, image.image, VK_FORMAT_R8G8B8A8_UNORM,
+      VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL, graphicsQueue);
+
+   vkDestroyBuffer(device, stagingBuffer, nullptr);
+   vkFreeMemory(device, stagingBufferMemory, nullptr);
 }