feat create method Rectangle#draw

20 files changed, 1083 insertions, 90 deletions

diff --git a/src/vk/destination_buffer.cpp b/src/vk/destination_buffer.cpp
index 872f8a8..5c55fd2 100644
--- a/src/vk/destination_buffer.cpp
+++ b/src/vk/destination_buffer.cpp
@@ -34,39 +34,7 @@ DestinationBuffer::DestinationBuffer(
 
   BaseBuffer::loader.execute(dynamic_cast<BaseBuffer*>(this));
 
-  // Load command
-  {
-    CommandPool command_pool(this->queue_family, 1);
-    Queue transfer_queue{this->queue_family->get_queue()};
-
-    this->vk_command_buffer = command_pool.command_buffers[0];
-
-    VkCommandBufferBeginInfo begin_info = {};
-    begin_info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
-    begin_info.flags = VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT;
-
-    VkBufferCopy copy_region = {};
-    copy_region.srcOffset = 0;
-    copy_region.dstOffset = 0;
-    copy_region.size = this->device_size;
-
-    vkBeginCommandBuffer(this->vk_command_buffer, &begin_info);
-
-    vkCmdCopyBuffer(
-      this->vk_command_buffer, this->source_buffer->buffer, this->buffer, 1,
-      &copy_region);
-
-    vkEndCommandBuffer(this->vk_command_buffer);
-
-    VkSubmitInfo submit_info = {};
-    submit_info.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
-    submit_info.commandBufferCount = 1;
-    submit_info.pCommandBuffers = &this->vk_command_buffer;
-
-    vkQueueSubmit(transfer_queue.queue, 1, &submit_info, VK_NULL_HANDLE);
-
-    vkQueueWaitIdle(transfer_queue.queue);
-  }
+  this->copy_data();
 }
 
 DestinationBuffer::DestinationBuffer(
@@ -102,4 +70,40 @@ DestinationBuffer::~DestinationBuffer()
   BaseBuffer::loader.revert(dynamic_cast<BaseBuffer*>(this));
 }
 
+void
+DestinationBuffer::copy_data()
+{
+  CommandPool command_pool(this->queue_family, 1);
+  Queue transfer_queue{this->queue_family->get_queue()};
+  this->device_size = source_buffer->device_size;
+
+  this->vk_command_buffer = command_pool.command_buffers[0];
+
+  VkCommandBufferBeginInfo begin_info = {};
+  begin_info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
+  begin_info.flags = VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT;
+
+  VkBufferCopy copy_region = {};
+  copy_region.srcOffset = 0;
+  copy_region.dstOffset = 0;
+  copy_region.size = this->device_size;
+
+  vkBeginCommandBuffer(this->vk_command_buffer, &begin_info);
+
+  vkCmdCopyBuffer(
+    this->vk_command_buffer, this->source_buffer->buffer, this->buffer, 1,
+    &copy_region);
+
+  vkEndCommandBuffer(this->vk_command_buffer);
+
+  VkSubmitInfo submit_info = {};
+  submit_info.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
+  submit_info.commandBufferCount = 1;
+  submit_info.pCommandBuffers = &this->vk_command_buffer;
+
+  vkQueueSubmit(transfer_queue.queue, 1, &submit_info, VK_NULL_HANDLE);
+
+  vkQueueWaitIdle(transfer_queue.queue);
+}
+
 }
diff --git a/src/vk/destination_buffer.hpp b/src/vk/destination_buffer.hpp
index e856f4d..9b42af3 100644
--- a/src/vk/destination_buffer.hpp
+++ b/src/vk/destination_buffer.hpp
@@ -44,6 +44,9 @@ struct DestinationBuffer: public BaseBuffer
   operator=(DestinationBuffer &&that);
 
   ~DestinationBuffer();
+
+  void
+  copy_data();
 };
 
 }
diff --git a/src/vk/device.cpp b/src/vk/device.cpp
index 74727f9..957ae6d 100644
--- a/src/vk/device.cpp
+++ b/src/vk/device.cpp
@@ -126,6 +126,7 @@ Device::Device(VkPhysicalDevice vk_physical_device, bool with_swapchain)
 
     VkPhysicalDeviceFeatures required_features = {};
     required_features.multiDrawIndirect = supported_features.multiDrawIndirect;
+    required_features.fillModeNonSolid = VK_TRUE;
     required_features.geometryShader = VK_TRUE;
     required_features.tessellationShader = VK_TRUE;
     required_features.samplerAnisotropy = VK_TRUE;
@@ -165,6 +166,10 @@ Device::Device(VkPhysicalDevice vk_physical_device, bool with_swapchain)
       this->device, DATA_DIR "/glsl/shader_2d.vert.spv");
     this->frag2d_shader_module = create_shader_module(
       this->device, DATA_DIR "/glsl/shader_2d.frag.spv");
+    this->vert2d_wired_shader_module = create_shader_module(
+      this->device, DATA_DIR "/glsl/shader_2d_wired.vert.spv");
+    this->frag2d_wired_shader_module = create_shader_module(
+      this->device, DATA_DIR "/glsl/shader_2d_wired.frag.spv");
   }
 
   this->queue_families = static_cast<QueueFamily*>(
@@ -202,6 +207,8 @@ Device::~Device()
   vkDestroyShaderModule(this->device, this->frag3d_shader_module, nullptr);
   vkDestroyShaderModule(this->device, this->vert2d_shader_module, nullptr);
   vkDestroyShaderModule(this->device, this->frag2d_shader_module, nullptr);
+  vkDestroyShaderModule(this->device, this->vert2d_wired_shader_module, nullptr);
+  vkDestroyShaderModule(this->device, this->frag2d_wired_shader_module, nullptr);
 
   vkDeviceWaitIdle(this->device);
   vkDestroyDevice(this->device, nullptr);
diff --git a/src/vk/device.hpp b/src/vk/device.hpp
index cc5df82..9f5a776 100644
--- a/src/vk/device.hpp
+++ b/src/vk/device.hpp
@@ -41,6 +41,8 @@ public:
   VkShaderModule frag3d_shader_module;
   VkShaderModule vert2d_shader_module;
   VkShaderModule frag2d_shader_module;
+  VkShaderModule vert2d_wired_shader_module;
+  VkShaderModule frag2d_wired_shader_module;
 
   bool with_swapchain;
 
diff --git a/src/vk/graphics_pipeline_2d.cpp b/src/vk/graphics_pipeline_2d_solid.cpp
index 734a509..3906cc7 100644
--- a/src/vk/graphics_pipeline_2d.cpp
+++ b/src/vk/graphics_pipeline_2d_solid.cpp
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#include "graphics_pipeline_2d.hpp"
+#include "graphics_pipeline_2d_solid.hpp"
 
 #include <array>
 
@@ -27,7 +27,7 @@ namespace
 void
 load_framebuffer(void *obj)
 {
-  auto self = static_cast<VK::GraphicsPipeline2D*>(obj);
+  auto self = static_cast<VK::GraphicsPipeline2DSolid*>(obj);
 
   self->swapchain_framebuffers.resize(cg_core.vk_swapchain->images_count);
   for (auto i{0}; i < cg_core.vk_swapchain->images_count; i++)
@@ -39,7 +39,7 @@ load_framebuffer(void *obj)
     VkFramebufferCreateInfo framebuffer_info{};
     framebuffer_info.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO;
     framebuffer_info.renderPass =
-      cg_core.vk_graphics_pipeline_2d_layout->render_pass;
+      cg_core.vk_graphics_pipeline_2d_solid_layout->render_pass;
     framebuffer_info.attachmentCount = attachments.size();
     framebuffer_info.pAttachments = attachments.data();
     framebuffer_info.width = cg_core.display_width;
@@ -57,7 +57,7 @@ load_framebuffer(void *obj)
 void
 unload_framebuffer(void *obj)
 {
-  auto self = static_cast<VK::GraphicsPipeline2D*>(obj);
+  auto self = static_cast<VK::GraphicsPipeline2DSolid*>(obj);
 
   for(auto framebuffer: self->swapchain_framebuffers)
     vkDestroyFramebuffer(
@@ -67,7 +67,7 @@ unload_framebuffer(void *obj)
 void
 load_pipeline(void *obj)
 {
-  auto self = static_cast<VK::GraphicsPipeline2D*>(obj);
+  auto self = static_cast<VK::GraphicsPipeline2DSolid*>(obj);
 
   VkPipelineShaderStageCreateInfo vert_shader_stage_info{};
   vert_shader_stage_info.sType =
@@ -227,9 +227,10 @@ load_pipeline(void *obj)
   pipeline_info.pDepthStencilState = nullptr;
   pipeline_info.pColorBlendState = &color_blending;
   pipeline_info.pDynamicState = &dynamic_state_info;
-  pipeline_info.layout = cg_core.vk_graphics_pipeline_2d_layout->pipeline;
+  pipeline_info.layout =
+    cg_core.vk_graphics_pipeline_2d_solid_layout->pipeline;
   pipeline_info.renderPass =
-    cg_core.vk_graphics_pipeline_2d_layout->render_pass;
+    cg_core.vk_graphics_pipeline_2d_solid_layout->render_pass;
   pipeline_info.subpass = 0;
   pipeline_info.basePipelineHandle = VK_NULL_HANDLE;
   pipeline_info.basePipelineIndex = -1;
@@ -244,7 +245,7 @@ load_pipeline(void *obj)
 void
 unload_pipeline(void *obj)
 {
-  auto self = static_cast<VK::GraphicsPipeline2D*>(obj);
+  auto self = static_cast<VK::GraphicsPipeline2DSolid*>(obj);
 
   vkDestroyPipeline(
     cg_core.vk_device_with_swapchain->device, self->graphic_pipeline, nullptr);
@@ -260,18 +261,18 @@ const CommandChain loader{
 namespace VK
 {
 
-GraphicsPipeline2D::GraphicsPipeline2D()
+GraphicsPipeline2DSolid::GraphicsPipeline2DSolid()
 {
   loader.execute(this);
 }
 
-GraphicsPipeline2D::~GraphicsPipeline2D()
+GraphicsPipeline2DSolid::~GraphicsPipeline2DSolid()
 {
   loader.revert(this);
 }
 
 void
-GraphicsPipeline2D::draw(
+GraphicsPipeline2DSolid::draw(
   std::shared_ptr<View2D> view, const VkCommandBuffer draw_command_buffer,
   const size_t current_frame, const size_t next_frame,
   const uint32_t image_index)
@@ -307,7 +308,7 @@ GraphicsPipeline2D::draw(
 
       vkCmdBindDescriptorSets(
         draw_command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS,
-        cg_core.vk_graphics_pipeline_2d_layout->pipeline, 0,
+        cg_core.vk_graphics_pipeline_2d_solid_layout->pipeline, 0,
         vk_descriptor_sets.size(), vk_descriptor_sets.data(), 0, nullptr);
       vkCmdBindPipeline(
         draw_command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS,
diff --git a/src/vk/graphics_pipeline_2d.hpp b/src/vk/graphics_pipeline_2d_solid.hpp
index ffa373a..ec3c744 100644
--- a/src/vk/graphics_pipeline_2d.hpp
+++ b/src/vk/graphics_pipeline_2d_solid.hpp
@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-#ifndef CANDY_GEAR_VK_GRAPHICS_PIPELINE_2D_H
-#define CANDY_GEAR_VK_GRAPHICS_PIPELINE_2D_H 1
+#ifndef CANDY_GEAR_VK_GRAPHICS_PIPELINE_2D_SOLID_H
+#define CANDY_GEAR_VK_GRAPHICS_PIPELINE_2D_SOLID_H 1
 
 #include <memory>
 #include <unordered_map>
@@ -28,13 +28,13 @@
 namespace VK
 {
 
-struct GraphicsPipeline2D
+struct GraphicsPipeline2DSolid
 {
   std::vector<VkFramebuffer> swapchain_framebuffers;
   VkPipeline graphic_pipeline;
 
-  GraphicsPipeline2D();
-  ~GraphicsPipeline2D();
+  GraphicsPipeline2DSolid();
+  ~GraphicsPipeline2DSolid();
 
   void
   draw(std::shared_ptr<View2D> view, const VkCommandBuffer draw_command_buffer,
@@ -44,4 +44,4 @@ struct GraphicsPipeline2D
 
 }
 
-#endif /* CANDY_GEAR_VK_GRAPHICS_PIPELINE_2D_H */
+#endif /* CANDY_GEAR_VK_GRAPHICS_PIPELINE_2D_SOLID_H */
diff --git a/src/vk/graphics_pipeline_2d_layout.cpp b/src/vk/graphics_pipeline_2d_solid_layout.cpp
index 6840f2c..6f0da0e 100644
--- a/src/vk/graphics_pipeline_2d_layout.cpp
+++ b/src/vk/graphics_pipeline_2d_solid_layout.cpp
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#include "graphics_pipeline_2d_layout.hpp"
+#include "graphics_pipeline_2d_solid_layout.hpp"
 
 #include <array>
 
@@ -26,7 +26,7 @@ namespace
 void
 load_descriptor_set_view(void *obj)
 {
-  auto self = static_cast<VK::GraphicsPipeline2DLayout*>(obj);
+  auto self = static_cast<VK::GraphicsPipeline2DSolidLayout*>(obj);
 
   std::array<VkDescriptorSetLayoutBinding, 1> layout_bindings{};
 
@@ -53,7 +53,7 @@ load_descriptor_set_view(void *obj)
 void
 unload_descriptor_set_view(void *obj)
 {
-  auto self = static_cast<VK::GraphicsPipeline2DLayout*>(obj);
+  auto self = static_cast<VK::GraphicsPipeline2DSolidLayout*>(obj);
 
   vkDestroyDescriptorSetLayout(
     cg_core.vk_device_with_swapchain->device, self->descriptor_set_view,
@@ -63,7 +63,7 @@ unload_descriptor_set_view(void *obj)
 void
 load_descriptor_set_sprite(void *obj)
 {
-  auto self = static_cast<VK::GraphicsPipeline2DLayout*>(obj);
+  auto self = static_cast<VK::GraphicsPipeline2DSolidLayout*>(obj);
 
   std::array<VkDescriptorSetLayoutBinding, 2> layout_bindings{};
 
@@ -97,7 +97,7 @@ load_descriptor_set_sprite(void *obj)
 void
 unload_descriptor_set_sprite(void *obj)
 {
-  auto self = static_cast<VK::GraphicsPipeline2DLayout*>(obj);
+  auto self = static_cast<VK::GraphicsPipeline2DSolidLayout*>(obj);
 
   vkDestroyDescriptorSetLayout(
     cg_core.vk_device_with_swapchain->device, self->descriptor_set_sprite,
@@ -107,7 +107,7 @@ unload_descriptor_set_sprite(void *obj)
 void
 load_pipeline(void *obj)
 {
-  auto self = static_cast<VK::GraphicsPipeline2DLayout*>(obj);
+  auto self = static_cast<VK::GraphicsPipeline2DSolidLayout*>(obj);
 
   std::array<VkDescriptorSetLayout, 2> set_layouts{
     self->descriptor_set_view, self->descriptor_set_sprite
@@ -129,7 +129,7 @@ load_pipeline(void *obj)
 void
 unload_pipeline(void *obj)
 {
-  auto self = static_cast<VK::GraphicsPipeline2DLayout*>(obj);
+  auto self = static_cast<VK::GraphicsPipeline2DSolidLayout*>(obj);
 
   vkDestroyPipelineLayout(
     cg_core.vk_device_with_swapchain->device, self->pipeline, nullptr);
@@ -138,7 +138,7 @@ unload_pipeline(void *obj)
 void
 load_render_pass(void *obj)
 {
-  auto self = static_cast<VK::GraphicsPipeline2DLayout*>(obj);
+  auto self = static_cast<VK::GraphicsPipeline2DSolidLayout*>(obj);
 
   std::array<VkAttachmentDescription, 1> attachments{};
   // Color attachment.
@@ -150,7 +150,7 @@ load_render_pass(void *obj)
   attachments[0].stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
   attachments[0].stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
   attachments[0].initialLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
-  attachments[0].finalLayout = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR;
+  attachments[0].finalLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
 
   VkAttachmentReference color_attachment_ref{};
   color_attachment_ref.attachment = 0;
@@ -200,7 +200,7 @@ load_render_pass(void *obj)
 static void
 unload_render_pass(void *obj)
 {
-  auto self = static_cast<VK::GraphicsPipeline2DLayout*>(obj);
+  auto self = static_cast<VK::GraphicsPipeline2DSolidLayout*>(obj);
 
   vkDestroyRenderPass(
     cg_core.vk_device_with_swapchain->device, self->render_pass, nullptr);
@@ -218,12 +218,12 @@ const CommandChain loader{
 namespace VK
 {
 
-GraphicsPipeline2DLayout::GraphicsPipeline2DLayout()
+GraphicsPipeline2DSolidLayout::GraphicsPipeline2DSolidLayout()
 {
   loader.execute(this);
 }
 
-GraphicsPipeline2DLayout::~GraphicsPipeline2DLayout()
+GraphicsPipeline2DSolidLayout::~GraphicsPipeline2DSolidLayout()
 {
   loader.revert(this);
 }
diff --git a/src/vk/graphics_pipeline_2d_layout.hpp b/src/vk/graphics_pipeline_2d_solid_layout.hpp
index 1e0a794..121ddaa 100644
--- a/src/vk/graphics_pipeline_2d_layout.hpp
+++ b/src/vk/graphics_pipeline_2d_solid_layout.hpp
@@ -32,15 +32,15 @@ struct UBOSpritePositions
   glm::vec4 positions[128];
 };
 
-struct GraphicsPipeline2DLayout
+struct GraphicsPipeline2DSolidLayout
 {
   VkDescriptorSetLayout descriptor_set_view;
   VkDescriptorSetLayout descriptor_set_sprite;
   VkPipelineLayout pipeline;
   VkRenderPass render_pass;
 
-  GraphicsPipeline2DLayout();
-  ~GraphicsPipeline2DLayout();
+  GraphicsPipeline2DSolidLayout();
+  ~GraphicsPipeline2DSolidLayout();
 };
 
 }
diff --git a/src/vk/graphics_pipeline_2d_wired.cpp b/src/vk/graphics_pipeline_2d_wired.cpp
new file mode 100644
index 0000000..2b416c2
--- /dev/null
+++ b/src/vk/graphics_pipeline_2d_wired.cpp
@@ -0,0 +1,324 @@
+/*
+ * Copyright 2022 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 "graphics_pipeline_2d_wired.hpp"
+
+#include <array>
+
+#include "../core.hpp"
+#include "rectangle.hpp"
+#include "sprite.hpp"
+
+namespace
+{
+
+void
+load_framebuffer(void *obj)
+{
+  auto self = static_cast<VK::GraphicsPipeline2DWired*>(obj);
+
+  self->swapchain_framebuffers.resize(
+    cg_core.vk_swapchain->images_count);
+  for (auto i{0}; i < cg_core.vk_swapchain->images_count; i++)
+  {
+    std::array<VkImageView, 1> attachments = {
+      cg_core.vk_swapchain->image_views[i]
+    };
+
+    VkFramebufferCreateInfo framebuffer_info{};
+    framebuffer_info.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO;
+    framebuffer_info.renderPass =
+      cg_core.vk_graphics_pipeline_2d_wired_layout->render_pass;
+    framebuffer_info.attachmentCount = attachments.size();
+    framebuffer_info.pAttachments = attachments.data();
+    framebuffer_info.width = cg_core.display_width;
+    framebuffer_info.height = cg_core.display_height;
+    framebuffer_info.layers = 1;
+
+    if(vkCreateFramebuffer(
+         cg_core.vk_device_with_swapchain->device, &framebuffer_info, nullptr,
+         &self->swapchain_framebuffers[i]) != VK_SUCCESS)
+      throw CommandError{"Failed to create Vulkan Framebuffer."};
+  }
+}
+
+void
+unload_framebuffer(void *obj)
+{
+  auto self = static_cast<VK::GraphicsPipeline2DWired*>(obj);
+
+  for(auto framebuffer: self->swapchain_framebuffers)
+    vkDestroyFramebuffer(
+      cg_core.vk_device_with_swapchain->device, framebuffer, nullptr);
+}
+
+void
+load_pipeline(void *obj)
+{
+  auto self = static_cast<VK::GraphicsPipeline2DWired*>(obj);
+
+  VkPipelineShaderStageCreateInfo vert_shader_stage_info{};
+  vert_shader_stage_info.sType =
+      VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO;
+  vert_shader_stage_info.pNext = nullptr;
+  vert_shader_stage_info.flags = 0;
+  vert_shader_stage_info.stage = VK_SHADER_STAGE_VERTEX_BIT;
+  vert_shader_stage_info.module =
+    cg_core.vk_device_with_swapchain->vert2d_wired_shader_module;
+  vert_shader_stage_info.pName = "main";
+  vert_shader_stage_info.pSpecializationInfo = nullptr;
+
+  VkPipelineShaderStageCreateInfo frag_shader_stage_info{};
+  frag_shader_stage_info.sType =
+      VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO;
+  frag_shader_stage_info.pNext = nullptr;
+  frag_shader_stage_info.flags = 0;
+  frag_shader_stage_info.stage = VK_SHADER_STAGE_FRAGMENT_BIT;
+  frag_shader_stage_info.module =
+    cg_core.vk_device_with_swapchain->frag2d_wired_shader_module;
+  frag_shader_stage_info.pName = "main";
+  frag_shader_stage_info.pSpecializationInfo = nullptr;
+
+  VkPipelineShaderStageCreateInfo shader_stages[] = {
+    vert_shader_stage_info,
+    frag_shader_stage_info
+  };
+
+  VkVertexInputBindingDescription vertex_input_binding{};
+  vertex_input_binding.binding = 0;
+  vertex_input_binding.stride = sizeof(glm::vec2);
+  vertex_input_binding.inputRate = VK_VERTEX_INPUT_RATE_VERTEX;
+
+  std::array<VkVertexInputAttributeDescription, 1> vertex_attribute{};
+  vertex_attribute[0].location = 0;
+  vertex_attribute[0].binding = 0;
+  vertex_attribute[0].format = VK_FORMAT_R32G32_SFLOAT;
+  vertex_attribute[0].offset = 0;
+
+  VkPipelineVertexInputStateCreateInfo vertex_input_info = {};
+  vertex_input_info.sType =
+      VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO;
+  vertex_input_info.pNext = nullptr;
+  vertex_input_info.flags = 0;
+  vertex_input_info.vertexBindingDescriptionCount = 1;
+  vertex_input_info.pVertexBindingDescriptions = &vertex_input_binding;
+  vertex_input_info.vertexAttributeDescriptionCount =
+      static_cast<uint32_t>(vertex_attribute.size());
+  vertex_input_info.pVertexAttributeDescriptions = vertex_attribute.data();
+
+  VkPipelineInputAssemblyStateCreateInfo input_assembly = {};
+  input_assembly.sType =
+      VK_STRUCTURE_TYPE_PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO;
+  input_assembly.pNext = nullptr;
+  input_assembly.flags = 0;
+  input_assembly.topology = VK_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP;
+  input_assembly.primitiveRestartEnable = VK_FALSE;
+
+  VkViewport viewport = {};
+  viewport.x = 0;
+  viewport.y = 0;
+  viewport.width = cg_core.display_width;
+  viewport.height = cg_core.display_height;
+  viewport.minDepth = 0.0f;
+  viewport.maxDepth = 1.0f;
+
+  VkRect2D scissor = {};
+  scissor.offset = {0, 0};
+  scissor.extent = {cg_core.display_width, cg_core.display_height};
+
+  VkPipelineViewportStateCreateInfo viewport_state = {};
+  viewport_state.sType =
+      VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO;
+  viewport_state.pNext = nullptr;
+  viewport_state.flags = 0;
+  viewport_state.viewportCount = 1;
+  viewport_state.pViewports = &viewport;
+  viewport_state.scissorCount = 1;
+  viewport_state.pScissors = &scissor;
+
+  VkPipelineRasterizationStateCreateInfo rasterizer = {};
+  rasterizer.sType =
+      VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_CREATE_INFO;
+  rasterizer.pNext = nullptr;
+  rasterizer.flags = 0;
+  rasterizer.depthClampEnable = VK_FALSE;
+  rasterizer.rasterizerDiscardEnable = VK_FALSE;
+  rasterizer.polygonMode = VK_POLYGON_MODE_LINE;
+  rasterizer.cullMode = VK_CULL_MODE_NONE;
+  rasterizer.frontFace = VK_FRONT_FACE_COUNTER_CLOCKWISE;
+  rasterizer.depthBiasEnable = VK_FALSE;
+  rasterizer.depthBiasConstantFactor = 0.0f;
+  rasterizer.depthBiasClamp = 0.0f;
+  rasterizer.depthBiasSlopeFactor = 0.0f;
+  rasterizer.lineWidth = 1.0f;
+
+  VkPipelineMultisampleStateCreateInfo multisampling = {};
+  multisampling.sType =
+      VK_STRUCTURE_TYPE_PIPELINE_MULTISAMPLE_STATE_CREATE_INFO;
+  multisampling.rasterizationSamples = VK_SAMPLE_COUNT_1_BIT;
+  multisampling.sampleShadingEnable = VK_FALSE;
+  multisampling.minSampleShading = 1.0f;
+  multisampling.pSampleMask = nullptr;
+  multisampling.alphaToCoverageEnable = VK_FALSE;
+  multisampling.alphaToOneEnable = VK_FALSE;
+
+  VkPipelineColorBlendAttachmentState color_blend_attachment = {};
+  color_blend_attachment.blendEnable = VK_FALSE;
+  color_blend_attachment.srcColorBlendFactor = VK_BLEND_FACTOR_ONE;
+  color_blend_attachment.dstColorBlendFactor = VK_BLEND_FACTOR_ZERO;
+  color_blend_attachment.colorBlendOp = VK_BLEND_OP_ADD;
+  color_blend_attachment.srcAlphaBlendFactor = VK_BLEND_FACTOR_ONE;
+  color_blend_attachment.dstAlphaBlendFactor = VK_BLEND_FACTOR_ZERO;
+  color_blend_attachment.alphaBlendOp = VK_BLEND_OP_ADD;
+  color_blend_attachment.colorWriteMask =
+      VK_COLOR_COMPONENT_R_BIT | VK_COLOR_COMPONENT_G_BIT |
+      VK_COLOR_COMPONENT_B_BIT | VK_COLOR_COMPONENT_A_BIT;
+
+  VkPipelineColorBlendStateCreateInfo color_blending = {};
+  color_blending.sType =
+      VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO;
+  color_blending.pNext = nullptr;
+  color_blending.flags = 0;
+  color_blending.logicOpEnable = VK_FALSE;
+  color_blending.logicOp = VK_LOGIC_OP_COPY;
+  color_blending.attachmentCount = 1;
+  color_blending.pAttachments = &color_blend_attachment;
+  color_blending.blendConstants[0] = 0.0f;
+  color_blending.blendConstants[1] = 0.0f;
+  color_blending.blendConstants[2] = 0.0f;
+  color_blending.blendConstants[3] = 0.0f;
+
+  VkDynamicState dynamic_states[] = {
+    VK_DYNAMIC_STATE_VIEWPORT,
+    VK_DYNAMIC_STATE_LINE_WIDTH
+  };
+
+  VkPipelineDynamicStateCreateInfo dynamic_state_info = {};
+  dynamic_state_info.sType =
+      VK_STRUCTURE_TYPE_PIPELINE_DYNAMIC_STATE_CREATE_INFO;
+  dynamic_state_info.dynamicStateCount = 2;
+  dynamic_state_info.pDynamicStates = dynamic_states;
+
+  VkGraphicsPipelineCreateInfo pipeline_info{};
+  pipeline_info.sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO;
+  pipeline_info.pNext = nullptr;
+  pipeline_info.flags = 0;
+  pipeline_info.stageCount = 2;
+  pipeline_info.pStages = shader_stages;
+  pipeline_info.pVertexInputState = &vertex_input_info;
+  pipeline_info.pInputAssemblyState = &input_assembly;
+  pipeline_info.pTessellationState = nullptr;
+  pipeline_info.pViewportState = &viewport_state;
+  pipeline_info.pRasterizationState = &rasterizer;
+  pipeline_info.pMultisampleState = &multisampling;
+  pipeline_info.pDepthStencilState = nullptr;
+  pipeline_info.pColorBlendState = &color_blending;
+  pipeline_info.pDynamicState = &dynamic_state_info;
+  pipeline_info.layout =
+    cg_core.vk_graphics_pipeline_2d_wired_layout->pipeline;
+  pipeline_info.renderPass =
+    cg_core.vk_graphics_pipeline_2d_wired_layout->render_pass;
+  pipeline_info.subpass = 0;
+  pipeline_info.basePipelineHandle = VK_NULL_HANDLE;
+  pipeline_info.basePipelineIndex = -1;
+
+  if(vkCreateGraphicsPipelines(
+       cg_core.vk_device_with_swapchain->device, VK_NULL_HANDLE, 1,
+       &pipeline_info, nullptr, &self->graphic_pipeline) != VK_SUCCESS)
+    throw CommandError{"Failed to create graphics pipeline."};
+}
+
+void
+unload_pipeline(void *obj)
+{
+  auto self = static_cast<VK::GraphicsPipeline2DWired*>(obj);
+
+  vkDestroyPipeline(
+    cg_core.vk_device_with_swapchain->device, self->graphic_pipeline, nullptr);
+}
+
+const CommandChain loader{
+  {&load_framebuffer, &unload_framebuffer},
+  {&load_pipeline, &unload_pipeline}
+};
+
+}
+
+namespace VK
+{
+
+GraphicsPipeline2DWired::GraphicsPipeline2DWired()
+{
+  loader.execute(this);
+}
+
+GraphicsPipeline2DWired::~GraphicsPipeline2DWired()
+{
+  loader.revert(this);
+}
+
+void
+GraphicsPipeline2DWired::draw(
+  std::shared_ptr<View2D> view, const VkCommandBuffer draw_command_buffer,
+  const size_t current_frame, const size_t next_frame,
+  const uint32_t image_index)
+{
+  // Set viewport
+  {
+    VkViewport vk_viewport{};
+    vk_viewport.x = view->region.x;
+    vk_viewport.y = view->region.y;
+    vk_viewport.width = view->region.z;
+    vk_viewport.height = view->region.w;
+    vk_viewport.minDepth = 0.0f;
+    vk_viewport.maxDepth = 1.0f;
+    vkCmdSetViewport(draw_command_buffer, 0, 1, &vk_viewport);
+
+    VkRect2D vk_scissor{};
+    vk_scissor.offset.x = static_cast<int32_t>(view->region.x);
+    vk_scissor.offset.y = static_cast<int32_t>(view->region.y);
+    vk_scissor.extent.width = static_cast<uint32_t>(view->region.z);
+    vk_scissor.extent.height = static_cast<uint32_t>(view->region.w);
+    vkCmdSetScissor(draw_command_buffer, 0, 1, &vk_scissor);
+  }
+
+  // Draw rectangles
+  for(auto& rectangle: view->rectangles_to_draw[current_frame])
+  {
+    std::array<VkDescriptorSet, 2> vk_descriptor_sets{
+      view->descriptor_sets_2d[image_index],
+      rectangle->descriptor_sets[image_index]};
+    VkDeviceSize offsets[]{0};
+
+    vkCmdBindDescriptorSets(
+      draw_command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS,
+      cg_core.vk_graphics_pipeline_2d_wired_layout->pipeline, 0,
+      vk_descriptor_sets.size(), vk_descriptor_sets.data(), 0, nullptr);
+    vkCmdBindPipeline(
+      draw_command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS,
+      this->graphic_pipeline);
+    vkCmdBindVertexBuffers(
+      draw_command_buffer, 0, 1,
+      &rectangle->vertex_buffers[image_index].buffer, offsets);
+    vkCmdDraw(
+      draw_command_buffer, Rectangle::vertex_count, 1, 0, 0);
+  }
+
+  // Prepare for the next frame.
+  view->rectangles_to_draw[next_frame].clear();
+}
+
+}
diff --git a/src/vk/graphics_pipeline_2d_wired.hpp b/src/vk/graphics_pipeline_2d_wired.hpp
new file mode 100644
index 0000000..e6c40de
--- /dev/null
+++ b/src/vk/graphics_pipeline_2d_wired.hpp
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2022 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.
+ */
+
+#ifndef CANDY_GEAR_VK_GRAPHICS_PIPELINE_2D_WIRED_H
+#define CANDY_GEAR_VK_GRAPHICS_PIPELINE_2D_WIRED_H 1
+
+#include <memory>
+#include <unordered_map>
+#include <vector>
+
+#include "core.hpp"
+#include "view_2d.hpp"
+
+namespace VK
+{
+
+struct GraphicsPipeline2DWired
+{
+  std::vector<VkFramebuffer> swapchain_framebuffers;
+  VkPipeline graphic_pipeline;
+
+  GraphicsPipeline2DWired();
+  ~GraphicsPipeline2DWired();
+
+  void
+  draw(std::shared_ptr<View2D> view, const VkCommandBuffer draw_command_buffer,
+       const size_t current_frame, const size_t next_frame,
+       const uint32_t image_index);
+};
+
+}
+
+#endif /* CANDY_GEAR_VK_GRAPHICS_PIPELINE_2D_WIRED_H */
diff --git a/src/vk/graphics_pipeline_2d_wired_layout.cpp b/src/vk/graphics_pipeline_2d_wired_layout.cpp
new file mode 100644
index 0000000..c523bc7
--- /dev/null
+++ b/src/vk/graphics_pipeline_2d_wired_layout.cpp
@@ -0,0 +1,225 @@
+/*
+ * Copyright 2022 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 "graphics_pipeline_2d_wired_layout.hpp"
+
+#include <array>
+
+#include "../core.hpp"
+#include "graphics_pipeline_2d_solid_layout.hpp"
+
+namespace
+{
+
+void
+load_descriptor_set_view(void *obj)
+{
+  auto self = static_cast<VK::GraphicsPipeline2DWiredLayout*>(obj);
+
+  std::array<VkDescriptorSetLayoutBinding, 1> layout_bindings{};
+
+  layout_bindings[0].binding = 0;
+  layout_bindings[0].descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
+  layout_bindings[0].descriptorCount = 1;
+  layout_bindings[0].stageFlags = VK_SHADER_STAGE_VERTEX_BIT;
+  layout_bindings[0].pImmutableSamplers = nullptr;
+
+  VkDescriptorSetLayoutCreateInfo layout_info{};
+  layout_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO;
+  layout_info.pNext = nullptr;
+  layout_info.flags = 0;
+  layout_info.bindingCount = static_cast<uint32_t>(layout_bindings.size());
+  layout_info.pBindings = layout_bindings.data();
+
+  if(vkCreateDescriptorSetLayout(
+       cg_core.vk_device_with_swapchain->device, &layout_info, nullptr,
+       &self->descriptor_set_view) != VK_SUCCESS)
+    throw CommandError{
+      "Failed to create Vulkan descriptor set layout for projection."};
+}
+
+void
+unload_descriptor_set_view(void *obj)
+{
+  auto self = static_cast<VK::GraphicsPipeline2DWiredLayout*>(obj);
+
+  vkDestroyDescriptorSetLayout(
+    cg_core.vk_device_with_swapchain->device, self->descriptor_set_view,
+    nullptr);
+}
+
+void
+load_descriptor_set_instance(void *obj)
+{
+  auto self = static_cast<VK::GraphicsPipeline2DWiredLayout*>(obj);
+
+  std::array<VkDescriptorSetLayoutBinding, 1> layout_bindings{};
+
+  layout_bindings[0].binding = 0;
+  layout_bindings[0].descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
+  layout_bindings[0].descriptorCount = 1;
+  layout_bindings[0].stageFlags = VK_SHADER_STAGE_FRAGMENT_BIT;
+  layout_bindings[0].pImmutableSamplers = nullptr;
+
+  VkDescriptorSetLayoutCreateInfo layout_info{};
+  layout_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO;
+  layout_info.pNext = nullptr;
+  layout_info.flags = 0;
+  layout_info.bindingCount = static_cast<uint32_t>(layout_bindings.size());
+  layout_info.pBindings = layout_bindings.data();
+
+  if(vkCreateDescriptorSetLayout(
+       cg_core.vk_device_with_swapchain->device, &layout_info, nullptr,
+       &self->descriptor_set_instance) != VK_SUCCESS)
+    throw CommandError{
+      "Failed to create Vulkan descriptor set layout for rectangles."};
+}
+
+void
+unload_descriptor_set_instance(void *obj)
+{
+  auto self = static_cast<VK::GraphicsPipeline2DWiredLayout*>(obj);
+
+  vkDestroyDescriptorSetLayout(
+    cg_core.vk_device_with_swapchain->device, self->descriptor_set_instance,
+    nullptr);
+}
+
+void
+load_pipeline(void *obj)
+{
+  auto self = static_cast<VK::GraphicsPipeline2DWiredLayout*>(obj);
+
+  std::array<VkDescriptorSetLayout, 2> set_layouts{
+    self->descriptor_set_view, self->descriptor_set_instance
+  };
+
+  VkPipelineLayoutCreateInfo pipeline_layout_info{};
+  pipeline_layout_info.sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO;
+  pipeline_layout_info.setLayoutCount = set_layouts.size();
+  pipeline_layout_info.pSetLayouts = set_layouts.data();
+  pipeline_layout_info.pushConstantRangeCount = 0;
+  pipeline_layout_info.pPushConstantRanges = nullptr;
+
+  if(vkCreatePipelineLayout(
+       cg_core.vk_device_with_swapchain->device, &pipeline_layout_info,
+       nullptr, &self->pipeline) != VK_SUCCESS)
+    throw CommandError{"Failed to create Vulkan pipeline layout."};
+}
+
+void
+unload_pipeline(void *obj)
+{
+  auto self = static_cast<VK::GraphicsPipeline2DWiredLayout*>(obj);
+
+  vkDestroyPipelineLayout(
+    cg_core.vk_device_with_swapchain->device, self->pipeline, nullptr);
+}
+
+void
+load_render_pass(void *obj)
+{
+  auto self = static_cast<VK::GraphicsPipeline2DWiredLayout*>(obj);
+
+  std::array<VkAttachmentDescription, 1> attachments{};
+  // Color attachment.
+  attachments[0].flags = 0;
+  attachments[0].format = cg_core.vk_swapchain->image_format;
+  attachments[0].samples = VK_SAMPLE_COUNT_1_BIT;
+  attachments[0].loadOp = VK_ATTACHMENT_LOAD_OP_LOAD;
+  attachments[0].storeOp = VK_ATTACHMENT_STORE_OP_STORE;
+  attachments[0].stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
+  attachments[0].stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
+  attachments[0].initialLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
+  attachments[0].finalLayout = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR;
+
+  VkAttachmentReference color_attachment_ref{};
+  color_attachment_ref.attachment = 0;
+  color_attachment_ref.layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
+
+  VkSubpassDescription subpass{};
+  subpass.flags = 0;
+  subpass.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
+  subpass.inputAttachmentCount = 0;
+  subpass.pInputAttachments = nullptr;
+  subpass.colorAttachmentCount = 1;
+  subpass.pColorAttachments = &color_attachment_ref;
+  subpass.pResolveAttachments = nullptr;
+  subpass.pDepthStencilAttachment = nullptr;
+  subpass.preserveAttachmentCount = 0;
+  subpass.pPreserveAttachments = nullptr;
+
+  VkSubpassDependency dependency{};
+  dependency.srcSubpass = VK_SUBPASS_EXTERNAL;
+  dependency.dstSubpass = 0;
+  dependency.srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT |
+    VK_PIPELINE_STAGE_EARLY_FRAGMENT_TESTS_BIT;
+  dependency.srcAccessMask = 0;
+  dependency.dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT |
+    VK_PIPELINE_STAGE_EARLY_FRAGMENT_TESTS_BIT;
+  dependency.dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_READ_BIT |
+    VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT |
+    VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
+
+  VkRenderPassCreateInfo render_pass_info{};
+  render_pass_info.sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO;
+  render_pass_info.pNext = nullptr;
+  render_pass_info.flags = 0;
+  render_pass_info.attachmentCount = attachments.size();
+  render_pass_info.pAttachments = attachments.data();
+  render_pass_info.subpassCount = 1;
+  render_pass_info.pSubpasses = &subpass;
+  render_pass_info.dependencyCount = 1;
+  render_pass_info.pDependencies = &dependency;
+
+  if(vkCreateRenderPass(
+       cg_core.vk_device_with_swapchain->device, &render_pass_info,
+       nullptr, &self->render_pass) != VK_SUCCESS)
+    throw CommandError{"Failed to create Vulkan Render Pass 2D."};
+}
+
+static void
+unload_render_pass(void *obj)
+{
+  auto self = static_cast<VK::GraphicsPipeline2DWiredLayout*>(obj);
+
+  vkDestroyRenderPass(
+    cg_core.vk_device_with_swapchain->device, self->render_pass, nullptr);
+}
+
+const CommandChain loader{
+  {&load_descriptor_set_view, &unload_descriptor_set_view},
+  {&load_descriptor_set_instance, &unload_descriptor_set_instance},
+  {&load_pipeline, &unload_pipeline},
+  {&load_render_pass, &unload_render_pass}
+};
+
+}
+
+namespace VK
+{
+
+GraphicsPipeline2DWiredLayout::GraphicsPipeline2DWiredLayout()
+{
+  loader.execute(this);
+}
+
+GraphicsPipeline2DWiredLayout::~GraphicsPipeline2DWiredLayout()
+{
+  loader.revert(this);
+}
+
+}
diff --git a/src/vk/graphics_pipeline_2d_wired_layout.hpp b/src/vk/graphics_pipeline_2d_wired_layout.hpp
new file mode 100644
index 0000000..3d0268e
--- /dev/null
+++ b/src/vk/graphics_pipeline_2d_wired_layout.hpp
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2022 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.
+ */
+
+#ifndef CANDY_GEAR_VK_GRAPHICS_PIPELINE_2D_WIRED_LAYOUT_H
+#define CANDY_GEAR_VK_GRAPHICS_PIPELINE_2D_WIRED_LAYOUT_H 1
+
+#include "core.hpp"
+
+namespace VK
+{
+
+struct UBOModel2D
+{
+  glm::vec3 color;
+};
+
+struct GraphicsPipeline2DWiredLayout
+{
+  VkDescriptorSetLayout descriptor_set_view;
+  VkDescriptorSetLayout descriptor_set_instance;
+  VkPipelineLayout pipeline;
+  VkRenderPass render_pass;
+
+  GraphicsPipeline2DWiredLayout();
+  ~GraphicsPipeline2DWiredLayout();
+};
+
+}
+
+#endif /* CANDY_GEAR_VK_GRAPHICS_PIPELINE_2D_LAYOUT_H */
diff --git a/src/vk/rectangle.cpp b/src/vk/rectangle.cpp
new file mode 100644
index 0000000..b0925f1
--- /dev/null
+++ b/src/vk/rectangle.cpp
@@ -0,0 +1,245 @@
+/*
+ * Copyright 2022 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 "rectangle.hpp"
+
+#include <array>
+
+#include "../core.hpp"
+#include "graphics_pipeline_2d_wired_layout.hpp"
+
+namespace
+{
+
+void
+load_mesh(void *obj)
+{
+  auto self = static_cast<VK::Rectangle*>(obj);
+
+  self->queue_family =
+    cg_core.vk_device_with_swapchain->get_queue_family_with_graphics();
+
+  glm::vec2 rect[4]{
+    glm::vec2{self->x, self->y},
+    glm::vec2{self->x, self->y + self->height},
+    glm::vec2{self->x + self->width, self->y},
+    glm::vec2{self->x + self->width, self->y + self->height}
+  };
+
+  void *vertexes_data{&rect};
+  static const size_t vertexes_size =
+    sizeof(glm::vec2) * VK::Rectangle::vertex_count;
+  self->source_buffers.reserve(cg_core.vk_swapchain->images_count);
+  self->vertex_buffers.reserve(cg_core.vk_swapchain->images_count);
+  for(int i{0}; i < cg_core.vk_swapchain->images_count; i++)
+  {
+    self->source_buffers.emplace_back(
+      self->queue_family->device, vertexes_data, vertexes_size);
+    self->vertex_buffers.emplace_back(
+      self->queue_family, &self->source_buffers[i],
+      VK_BUFFER_USAGE_VERTEX_BUFFER_BIT);
+  }
+}
+
+void
+unload_mesh(void *obj)
+{
+  auto self = static_cast<VK::Rectangle*>(obj);
+
+  self->vertex_buffers.clear();
+  self->source_buffers.clear();
+}
+
+void
+load_uniform_buffer(void *obj)
+{
+  auto self = static_cast<VK::Rectangle*>(obj);
+
+  self->ub_rectangle.reserve(cg_core.vk_swapchain->images_count);
+  for(auto i{0}; i < cg_core.vk_swapchain->images_count; i++)
+    self->ub_rectangle.emplace_back(
+      cg_core.vk_device_with_swapchain, sizeof(VK::UBOModel2D));
+}
+
+void
+unload_uniform_buffer(void *obj)
+{
+  auto self = static_cast<VK::Rectangle*>(obj);
+
+  self->ub_rectangle.clear();
+}
+
+void
+load_descriptor_set_pool(void *obj)
+{
+  auto self = static_cast<VK::Rectangle*>(obj);
+
+  std::array<VkDescriptorPoolSize, 1> descriptor_pool_sizes{};
+  descriptor_pool_sizes[0].type = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
+  descriptor_pool_sizes[0].descriptorCount = self->ub_rectangle.size();
+
+  VkDescriptorPoolCreateInfo pool_info{};
+  pool_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO;
+  pool_info.pNext = nullptr;
+  pool_info.flags = 0;
+  pool_info.maxSets = self->ub_rectangle.size();
+  pool_info.poolSizeCount = descriptor_pool_sizes.size();
+  pool_info.pPoolSizes = descriptor_pool_sizes.data();
+
+  if(vkCreateDescriptorPool(
+       self->queue_family->device->device, &pool_info, nullptr,
+       &self->descriptor_pool) != VK_SUCCESS)
+    throw CommandError{"Failed to create a Vulkan descriptor pool."};
+}
+
+void
+unload_descriptor_set_pool(void *obj)
+{
+  auto self = static_cast<VK::Rectangle*>(obj);
+
+  vkDestroyDescriptorPool(
+    self->queue_family->device->device, self->descriptor_pool, nullptr);
+}
+
+void
+load_descriptor_sets(void *obj)
+{
+  auto self = static_cast<VK::Rectangle*>(obj);
+
+  std::vector<VkDescriptorSetLayout> layouts(
+    cg_core.vk_swapchain->images_count,
+    cg_core.vk_graphics_pipeline_2d_wired_layout->descriptor_set_instance);
+
+  VkDescriptorSetAllocateInfo alloc_info{};
+  alloc_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO;
+  alloc_info.descriptorPool = self->descriptor_pool;
+  alloc_info.descriptorSetCount = layouts.size();
+  alloc_info.pSetLayouts = layouts.data();
+
+  self->descriptor_sets.resize(layouts.size());
+  if(vkAllocateDescriptorSets(
+       self->queue_family->device->device, &alloc_info,
+       self->descriptor_sets.data()) != VK_SUCCESS)
+    CommandError{"Failed to create Vulkan descriptor set."};
+}
+
+void
+load_data_to_descriptor_sets(void *obj)
+{
+  auto self = static_cast<VK::Rectangle*>(obj);
+
+  for(auto i{0}; i < self->ub_rectangle.size(); i++)
+  {
+    VkDescriptorBufferInfo buffer_info{};
+    buffer_info.buffer = self->ub_rectangle[i].buffer;
+    buffer_info.offset = 0;
+    buffer_info.range = sizeof(VK::UBOModel2D);
+
+    std::array<VkWriteDescriptorSet, 1> write_descriptors{};
+    write_descriptors[0].sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
+    write_descriptors[0].dstSet = self->descriptor_sets[i];
+    write_descriptors[0].dstBinding = 0;
+    write_descriptors[0].dstArrayElement = 0;
+    write_descriptors[0].descriptorCount = 1;
+    write_descriptors[0].descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
+    write_descriptors[0].pBufferInfo = &buffer_info;
+    write_descriptors[0].pImageInfo = nullptr;
+    write_descriptors[0].pTexelBufferView = nullptr;
+
+    vkUpdateDescriptorSets(
+      cg_core.vk_device_with_swapchain->device, write_descriptors.size(),
+      write_descriptors.data(), 0, nullptr);
+  }
+}
+
+static const CommandChain loader{
+  {&load_mesh, &unload_mesh},
+  {&load_uniform_buffer, &unload_uniform_buffer},
+  {&load_descriptor_set_pool, &unload_descriptor_set_pool},
+  {&load_descriptor_sets, nullptr},
+  {&load_data_to_descriptor_sets, nullptr},
+};
+
+constexpr bool
+_align_vertically(const float a_x, const float a_width,
+                 const float b_x, const float b_width)
+{
+  return a_x <= b_x + b_width && a_x + a_width >= b_x;
+}
+
+constexpr bool
+_align_horizontally(const float a_y, const float a_height,
+                   const float b_y, const float b_height)
+{
+  return a_y <= b_y + b_height && a_y + a_height >= b_y;
+}
+
+}
+
+namespace VK
+{
+
+Rectangle::Rectangle(float x, float y, float width, float height):
+  x{x},
+  y{y},
+  width{width},
+  height{height}
+{
+  loader.execute(this);
+}
+
+Rectangle::~Rectangle()
+{
+  loader.revert(this);
+}
+
+bool
+Rectangle::align_vertically(const Rectangle &that) const
+{
+  return _align_vertically(this->x, this->width, that.x, that.width);
+}
+
+bool
+Rectangle::align_horizontally(const Rectangle &that) const
+{
+  return _align_horizontally(this->y, this->height, that.y, that.height);
+}
+
+bool
+Rectangle::collide(const Rectangle &that) const
+{
+  return
+    _align_vertically(this->x, this->width, that.x, that.width) &&
+    _align_horizontally(this->y, this->height, that.y, that.height);
+}
+
+void
+Rectangle::update_vertex_buffer()
+{
+  glm::vec2 rect[4]{
+    glm::vec2{this->x, this->y},
+    glm::vec2{this->x, this->y + this->height},
+    glm::vec2{this->x + this->width, this->y},
+    glm::vec2{this->x + this->width, this->y + this->height}
+  };
+
+  void *vertexes_data{&rect};
+  this->source_buffers[cg_core.vk_swapchain->current_frame].copy_data(
+    vertexes_data);
+  this->vertex_buffers[cg_core.vk_swapchain->current_frame].copy_data();
+}
+
+}
diff --git a/src/vk/rectangle.hpp b/src/vk/rectangle.hpp
new file mode 100644
index 0000000..fc21135
--- /dev/null
+++ b/src/vk/rectangle.hpp
@@ -0,0 +1,66 @@
+/*
+ * Copyright 2022 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.
+ */
+
+#ifndef CANDY_GEAR_VK_RECTANGLE_H
+#define CANDY_GEAR_VK_RECTANGLE_H 1
+
+#include <vector>
+
+#include "core.hpp"
+#include "destination_buffer.hpp"
+#include "queue_family.hpp"
+#include "uniform_buffer.hpp"
+
+namespace VK
+{
+
+struct Rectangle
+{
+  static const uint32_t vertex_count{4};
+
+  float x{0};
+  float y{0};
+  float width{1};
+  float height{1};
+
+  QueueFamily *queue_family;
+
+  std::vector<SourceBuffer> source_buffers;
+  std::vector<DestinationBuffer> vertex_buffers;
+
+  std::vector<UniformBuffer> ub_rectangle;
+
+  VkDescriptorPool descriptor_pool;
+  std::vector<VkDescriptorSet> descriptor_sets;
+
+  Rectangle() = default;
+  Rectangle(float x, float y, float width, float height);
+  ~Rectangle();
+
+  bool
+  align_vertically(const Rectangle &that) const;
+  bool
+  align_horizontally(const Rectangle &that) const;
+  bool
+  collide(const Rectangle &that) const;
+
+  void
+  update_vertex_buffer();
+};
+
+}
+
+#endif /* CANDY_GEAR_VK_RECTANGLE_H */
diff --git a/src/vk/renderer.cpp b/src/vk/renderer.cpp
index 8d82b00..a7e5f35 100644
--- a/src/vk/renderer.cpp
+++ b/src/vk/renderer.cpp
@@ -231,15 +231,16 @@ Renderer::draw()
       vkCmdEndRenderPass(draw_command_buffer);
     }
 
-    // 2D drawing
+    // 2D solid drawing
     {
       VkRenderPassBeginInfo render_pass_begin{};
       render_pass_begin.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
       render_pass_begin.pNext = nullptr;
       render_pass_begin.renderPass =
-        cg_core.vk_graphics_pipeline_2d_layout->render_pass;
+        cg_core.vk_graphics_pipeline_2d_solid_layout->render_pass;
       render_pass_begin.framebuffer =
-        cg_core.vk_graphics_pipeline_2d->swapchain_framebuffers[image_index];
+        cg_core.vk_graphics_pipeline_2d_solid->swapchain_framebuffers[
+          image_index];
       render_pass_begin.renderArea.offset = {0, 0};
       render_pass_begin.renderArea.extent = {
         static_cast<uint32_t>(cg_core.display_width),
@@ -251,12 +252,45 @@ Renderer::draw()
         draw_command_buffer, &render_pass_begin, VK_SUBPASS_CONTENTS_INLINE);
 
       for(auto &view: this->views_2d)
-        cg_core.vk_graphics_pipeline_2d->draw(
+        cg_core.vk_graphics_pipeline_2d_solid->draw(
           view, draw_command_buffer, cg_core.vk_swapchain->current_frame,
           next_frame, image_index);
 
       for(auto &view: this->views_3d)
-        cg_core.vk_graphics_pipeline_2d->draw(
+        cg_core.vk_graphics_pipeline_2d_solid->draw(
+          view, draw_command_buffer, cg_core.vk_swapchain->current_frame,
+          next_frame, image_index);
+
+      vkCmdEndRenderPass(draw_command_buffer);
+    }
+
+    // 2D wired drawing
+    {
+      VkRenderPassBeginInfo render_pass_begin{};
+      render_pass_begin.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
+      render_pass_begin.pNext = nullptr;
+      render_pass_begin.renderPass =
+        cg_core.vk_graphics_pipeline_2d_wired_layout->render_pass;
+      render_pass_begin.framebuffer =
+        cg_core.vk_graphics_pipeline_2d_wired->swapchain_framebuffers[
+          image_index];
+      render_pass_begin.renderArea.offset = {0, 0};
+      render_pass_begin.renderArea.extent = {
+        static_cast<uint32_t>(cg_core.display_width),
+        static_cast<uint32_t>(cg_core.display_height)};
+      render_pass_begin.clearValueCount = 0;
+      render_pass_begin.pClearValues = nullptr;
+
+      vkCmdBeginRenderPass(
+        draw_command_buffer, &render_pass_begin, VK_SUBPASS_CONTENTS_INLINE);
+
+      for(auto &view: this->views_2d)
+        cg_core.vk_graphics_pipeline_2d_wired->draw(
+          view, draw_command_buffer, cg_core.vk_swapchain->current_frame,
+          next_frame, image_index);
+
+      for(auto &view: this->views_3d)
+        cg_core.vk_graphics_pipeline_2d_wired->draw(
           view, draw_command_buffer, cg_core.vk_swapchain->current_frame,
           next_frame, image_index);
 
@@ -313,11 +347,8 @@ Renderer::draw()
 
     // Prepare for the next frame.
     {
-    this->models_to_draw[next_frame].clear();
-    for(auto &view: this->views_2d) view->sprites_to_draw[next_frame].clear();
-    for(auto &view: this->views_3d) view->sprites_to_draw[next_frame].clear();
-
-    cg_core.vk_swapchain->current_frame = next_frame;
+      this->models_to_draw[next_frame].clear();
+      cg_core.vk_swapchain->current_frame = next_frame;
     }
   }
   else
diff --git a/src/vk/source_buffer.cpp b/src/vk/source_buffer.cpp
index 7e6c570..f8f1aee 100644
--- a/src/vk/source_buffer.cpp
+++ b/src/vk/source_buffer.cpp
@@ -21,8 +21,7 @@
 namespace VK
 {
 
-SourceBuffer::SourceBuffer(Device *device, void *data, size_t data_size):
-  data{data}
+SourceBuffer::SourceBuffer(Device *device, void *data, size_t data_size)
 {
   this->device = device;
   this->device_size = data_size;
@@ -40,7 +39,7 @@ SourceBuffer::SourceBuffer(Device *device, void *data, size_t data_size):
     error += command_error.what();
     throw std::runtime_error{error};
   }
-  this->copy_data();
+  this->copy_data(data);
 }
 
 SourceBuffer::SourceBuffer(SourceBuffer &&that)
@@ -50,11 +49,9 @@ SourceBuffer::SourceBuffer(SourceBuffer &&that)
   this->device_size = that.device_size;
   this->buffer_usage = that.buffer_usage;
   this->memory_properties = that.memory_properties;
-  this->data = that.data;
 
   that.buffer = VK_NULL_HANDLE;
   that.device_memory = VK_NULL_HANDLE;
-  that.data = nullptr;
 }
 
 SourceBuffer&
@@ -65,11 +62,9 @@ SourceBuffer::operator=(SourceBuffer &&that)
   this->device_size = that.device_size;
   this->buffer_usage = that.buffer_usage;
   this->memory_properties = that.memory_properties;
-  this->data = that.data;
 
   that.buffer = VK_NULL_HANDLE;
   that.device_memory = VK_NULL_HANDLE;
-  that.data = nullptr;
 
   return *this;
 }
@@ -80,12 +75,12 @@ SourceBuffer::~SourceBuffer()
 }
 
 void
-SourceBuffer::copy_data()
+SourceBuffer::copy_data(void *src_data)
 {
   void *dst_data;
   vkMapMemory(this->device->device, this->device_memory, 0, this->device_size,
 	      0, &dst_data);
-  memcpy(dst_data, this->data, static_cast<size_t>(this->device_size));
+  memcpy(dst_data, src_data, static_cast<size_t>(this->device_size));
   vkUnmapMemory(this->device->device, this->device_memory);
 }
 
diff --git a/src/vk/source_buffer.hpp b/src/vk/source_buffer.hpp
index 713d708..440e561 100644
--- a/src/vk/source_buffer.hpp
+++ b/src/vk/source_buffer.hpp
@@ -28,8 +28,6 @@ struct SourceBuffer: public BaseBuffer
   SourceBuffer&
   operator=(const SourceBuffer &t) = delete;
 
-  void *data;
-
   SourceBuffer(Device *device, void *data, size_t data_size);
 
   SourceBuffer(SourceBuffer &&that);
@@ -39,7 +37,7 @@ struct SourceBuffer: public BaseBuffer
   ~SourceBuffer();
 
   void
-  copy_data();
+  copy_data(void *src_data);
 };
 
 }
diff --git a/src/vk/sprite.cpp b/src/vk/sprite.cpp
index 9a718d7..a7b802a 100644
--- a/src/vk/sprite.cpp
+++ b/src/vk/sprite.cpp
@@ -137,7 +137,7 @@ load_descriptor_sets(void *obj)
 
   std::vector<VkDescriptorSetLayout> layouts(
     cg_core.vk_swapchain->images_count,
-    cg_core.vk_graphics_pipeline_2d_layout->descriptor_set_sprite);
+    cg_core.vk_graphics_pipeline_2d_solid_layout->descriptor_set_sprite);
 
   VkDescriptorSetAllocateInfo alloc_info{};
   alloc_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO;
diff --git a/src/vk/view_2d.cpp b/src/vk/view_2d.cpp
index 623aa63..011fb1a 100644
--- a/src/vk/view_2d.cpp
+++ b/src/vk/view_2d.cpp
@@ -56,7 +56,7 @@ load_descriptor_sets_2d(void *obj)
 
   std::vector<VkDescriptorSetLayout> layouts(
     cg_core.vk_swapchain->images_count,
-    cg_core.vk_graphics_pipeline_2d_layout->descriptor_set_view);
+    cg_core.vk_graphics_pipeline_2d_solid_layout->descriptor_set_view);
 
   VkDescriptorSetAllocateInfo alloc_info{};
   alloc_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO;
@@ -124,6 +124,7 @@ const CommandChain View2D::descriptor_sets_loader{
 View2D::View2D(glm::vec4 region):
   region{region},
   descriptor_pool{VK_NULL_HANDLE},
+  rectangles_to_draw{cg_core.vk_swapchain->images_count},
   sprites_to_draw{cg_core.vk_swapchain->images_count}
 {
   loader.execute(this);
diff --git a/src/vk/view_2d.hpp b/src/vk/view_2d.hpp
index f6741cc..ec7225f 100644
--- a/src/vk/view_2d.hpp
+++ b/src/vk/view_2d.hpp
@@ -23,6 +23,7 @@
 
 #include "core.hpp"
 #include "sprite.hpp"
+#include "rectangle.hpp"
 
 namespace VK
 {
@@ -37,6 +38,7 @@ struct View2D
   VkDescriptorPool descriptor_pool;
   std::vector<VkDescriptorSet> descriptor_sets_2d;
 
+  std::vector<std::vector<std::shared_ptr<Rectangle>>> rectangles_to_draw;
   std::vector<
     std::unordered_map<std::shared_ptr<Sprite>, std::vector<glm::vec4>>>
   sprites_to_draw;