refa Rename graphical engine to BluCat

1 files changed, 204 insertions, 0 deletions

diff --git a/src/blucat/swapchain.cpp b/src/blucat/swapchain.cpp
new file mode 100644
index 0000000..1e521e4
--- /dev/null
+++ b/src/blucat/swapchain.cpp
@@ -0,0 +1,204 @@
+/*
+ * Copyright 2022-2024 Frederico de Oliveira Linhares
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "swapchain.hpp"
+
+#include "../core.hpp"
+
+#include <vector>
+
+namespace
+{
+
+void
+load_swapchain(void *obj)
+{
+  auto self = static_cast<BluCat::Swapchain*>(obj);
+
+  // Surface formats.
+  uint32_t vk_surface_format_count;
+  std::vector<VkSurfaceFormatKHR> vk_surface_formats;
+  vkGetPhysicalDeviceSurfaceFormatsKHR(
+    cg_core.vk_device_with_swapchain->physical_device, cg_core.window_surface,
+    &vk_surface_format_count, nullptr);
+  vk_surface_formats.resize(vk_surface_format_count);
+  vkGetPhysicalDeviceSurfaceFormatsKHR(
+    cg_core.vk_device_with_swapchain->physical_device, cg_core.window_surface,
+    &vk_surface_format_count, vk_surface_formats.data());
+
+  VkSwapchainCreateInfoKHR swapchain_create_info = {};
+  swapchain_create_info.sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR;
+  swapchain_create_info.pNext = nullptr;
+  swapchain_create_info.flags = 0;
+  swapchain_create_info.surface = cg_core.window_surface;
+  swapchain_create_info.minImageCount = 3; // triple buffering.
+
+  self->image_format = vk_surface_formats[0].format;
+  swapchain_create_info.imageFormat = self->image_format;
+  swapchain_create_info.imageColorSpace = vk_surface_formats[0].colorSpace;
+
+  swapchain_create_info.imageExtent = {
+    cg_core.display_width, cg_core.display_height};
+  swapchain_create_info.imageArrayLayers = 1;
+  swapchain_create_info.imageUsage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
+  swapchain_create_info.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE;
+  swapchain_create_info.queueFamilyIndexCount = 0;
+  swapchain_create_info.pQueueFamilyIndices = nullptr;
+  swapchain_create_info.preTransform = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR;
+  swapchain_create_info.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
+  swapchain_create_info.presentMode = VK_PRESENT_MODE_FIFO_KHR;
+  swapchain_create_info.clipped = VK_FALSE;
+  swapchain_create_info.oldSwapchain = VK_NULL_HANDLE;
+
+  if(vkCreateSwapchainKHR(
+       cg_core.vk_device_with_swapchain->device, &swapchain_create_info,
+       nullptr, &self->swapchain) != VK_SUCCESS)
+    throw CommandError{"Vulkan failed to create swapchain."};
+
+  vkGetSwapchainImagesKHR(
+    cg_core.vk_device_with_swapchain->device, self->swapchain,
+    &self->images_count, nullptr);
+  self->images = new VkImage[self->images_count];
+  vkGetSwapchainImagesKHR(
+    cg_core.vk_device_with_swapchain->device, self->swapchain,
+    &self->images_count, self->images);
+}
+
+void
+unload_swapchain(void *obj)
+{
+  auto self = static_cast<BluCat::Swapchain*>(obj);
+
+  delete[] self->images;
+  vkDestroySwapchainKHR(
+    cg_core.vk_device_with_swapchain->device, self->swapchain, nullptr);
+}
+
+void
+load_image_view(void *obj)
+{
+  auto self = static_cast<BluCat::Swapchain*>(obj);
+
+  self->image_views = new VkImageView[self->images_count];
+  for(auto i{0}; i < self->images_count; i++)
+  {
+    VkImageViewCreateInfo create_info = {};
+    create_info.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
+    create_info.image = self->images[i];
+    create_info.viewType = VK_IMAGE_VIEW_TYPE_2D;
+    create_info.format = self->image_format;
+    create_info.components.r = VK_COMPONENT_SWIZZLE_IDENTITY;
+    create_info.components.g = VK_COMPONENT_SWIZZLE_IDENTITY;
+    create_info.components.b = VK_COMPONENT_SWIZZLE_IDENTITY;
+    create_info.components.a = VK_COMPONENT_SWIZZLE_IDENTITY;
+    create_info.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
+    create_info.subresourceRange.baseMipLevel = 0;
+    create_info.subresourceRange.levelCount = 1;
+    create_info.subresourceRange.baseArrayLayer = 0;
+    create_info.subresourceRange.layerCount = 1;
+
+    if(vkCreateImageView(
+	 cg_core.vk_device_with_swapchain->device, &create_info, nullptr,
+	 &self->image_views[i]))
+      throw CommandError{"Could no create Image View for swapchain."};
+  }
+}
+
+void
+unload_image_view(void *obj)
+{
+  auto self = static_cast<BluCat::Swapchain*>(obj);
+
+  for(auto i{0}; i < self->images_count; i++)
+    vkDestroyImageView(
+      cg_core.vk_device_with_swapchain->device, self->image_views[i], nullptr);
+}
+
+void
+load_frame_sync(void *obj)
+{
+  auto self = static_cast<BluCat::Swapchain*>(obj);
+
+  self->image_available_semaphores.resize(self->max_frames_in_flight);
+  self->render_finished_semaphores.resize(self->max_frames_in_flight);
+  self->in_flight_fences.resize(self->max_frames_in_flight);
+
+  VkSemaphoreCreateInfo semaphore_info = {};
+  semaphore_info.sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO;
+  semaphore_info.pNext = nullptr;
+  semaphore_info.flags = 0;
+
+  VkFenceCreateInfo fence_info = {};
+  fence_info.sType = VK_STRUCTURE_TYPE_FENCE_CREATE_INFO;
+  fence_info.pNext = nullptr;
+  fence_info.flags = VK_FENCE_CREATE_SIGNALED_BIT;
+
+  // FIXME: if this loop fails, it will not destroy the semaphores.
+  for(auto i{0}; i < self->max_frames_in_flight; i++)
+  {
+    if(vkCreateSemaphore(
+	 cg_core.vk_device_with_swapchain->device, &semaphore_info,
+	 nullptr, &self->image_available_semaphores[i]) != VK_SUCCESS ||
+       vkCreateSemaphore(
+	 cg_core.vk_device_with_swapchain->device, &semaphore_info,
+	 nullptr, &self->render_finished_semaphores[i]) != VK_SUCCESS ||
+       vkCreateFence(cg_core.vk_device_with_swapchain->device, &fence_info,
+                     nullptr, &self->in_flight_fences[i]) != VK_SUCCESS)
+      throw CommandError{"Failed to create semaphores."};
+  }
+}
+
+void
+unload_frame_sync(void *obj)
+{
+  auto self = static_cast<BluCat::Swapchain*>(obj);
+
+  vkDeviceWaitIdle(cg_core.vk_device_with_swapchain->device);
+
+  for(auto i{0}; i < self->max_frames_in_flight; i++)
+  {
+    vkDestroySemaphore(cg_core.vk_device_with_swapchain->device,
+                       self->render_finished_semaphores[i], nullptr);
+    vkDestroySemaphore(cg_core.vk_device_with_swapchain->device,
+                       self->image_available_semaphores[i], nullptr);
+    vkDestroyFence(cg_core.vk_device_with_swapchain->device,
+		   self->in_flight_fences[i], nullptr);
+  }
+}
+
+const CommandChain loader{
+  {&load_swapchain, &unload_swapchain},
+  {&load_image_view, &unload_image_view},
+  {&load_frame_sync, &unload_frame_sync}
+};
+
+}
+
+namespace BluCat
+{
+
+Swapchain::Swapchain():
+  current_frame{0}
+{
+  loader.execute(this);
+}
+
+Swapchain::~Swapchain()
+{
+  loader.revert(this);
+}
+
+}