From f88712a929ee3543f8e1d45c6071f676df339cdb Mon Sep 17 00:00:00 2001
From: Frederico Linhares <fred@linhares.blue>
Date: Tue, 2 Aug 2022 16:52:33 -0300
Subject: refa Use Vulkan for graphics

This is a partial refactory. Some functionalities implemented in
SDL were removed and need reimplementation.
---
 src/vk/source_buffer.cpp | 92 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 src/vk/source_buffer.cpp

(limited to 'src/vk/source_buffer.cpp')

diff --git a/src/vk/source_buffer.cpp b/src/vk/source_buffer.cpp
new file mode 100644
index 0000000..7e6c570
--- /dev/null
+++ b/src/vk/source_buffer.cpp
@@ -0,0 +1,92 @@
+/*
+ * 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 "source_buffer.hpp"
+
+#include <cstring>
+
+namespace VK
+{
+
+SourceBuffer::SourceBuffer(Device *device, void *data, size_t data_size):
+  data{data}
+{
+  this->device = device;
+  this->device_size = data_size;
+  this->buffer_usage = VK_BUFFER_USAGE_TRANSFER_SRC_BIT;
+  this->memory_properties = VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT |
+    VK_MEMORY_PROPERTY_HOST_COHERENT_BIT;
+
+  try
+  {
+    VK::BaseBuffer::loader.execute(static_cast<VK::BaseBuffer*>(this));
+  }
+  catch(const CommandError &command_error)
+  {
+    std::string error{"Could not initialize Vulkan source buffer → "};
+    error += command_error.what();
+    throw std::runtime_error{error};
+  }
+  this->copy_data();
+}
+
+SourceBuffer::SourceBuffer(SourceBuffer &&that)
+{
+  this->buffer = that.buffer;
+  this->device_memory = that.device_memory;
+  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&
+SourceBuffer::operator=(SourceBuffer &&that)
+{
+  this->buffer = that.buffer;
+  this->device_memory = that.device_memory;
+  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;
+}
+
+SourceBuffer::~SourceBuffer()
+{
+  VK::BaseBuffer::loader.revert(static_cast<VK::BaseBuffer*>(this));
+}
+
+void
+SourceBuffer::copy_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));
+  vkUnmapMemory(this->device->device, this->device_memory);
+}
+
+}
-- 
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